| 1 | /* tc-mips.c -- assemble code for a MIPS chip. |
| 2 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
| 3 | 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 |
| 4 | Free Software Foundation, Inc. |
| 5 | Contributed by the OSF and Ralph Campbell. |
| 6 | Written by Keith Knowles and Ralph Campbell, working independently. |
| 7 | Modified for ECOFF and R4000 support by Ian Lance Taylor of Cygnus |
| 8 | Support. |
| 9 | |
| 10 | This file is part of GAS. |
| 11 | |
| 12 | GAS is free software; you can redistribute it and/or modify |
| 13 | it under the terms of the GNU General Public License as published by |
| 14 | the Free Software Foundation; either version 3, or (at your option) |
| 15 | any later version. |
| 16 | |
| 17 | GAS is distributed in the hope that it will be useful, |
| 18 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | GNU General Public License for more details. |
| 21 | |
| 22 | You should have received a copy of the GNU General Public License |
| 23 | along with GAS; see the file COPYING. If not, write to the Free |
| 24 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
| 25 | 02110-1301, USA. */ |
| 26 | |
| 27 | #include "as.h" |
| 28 | #include "config.h" |
| 29 | #include "subsegs.h" |
| 30 | #include "safe-ctype.h" |
| 31 | |
| 32 | #include "opcode/mips.h" |
| 33 | #include "itbl-ops.h" |
| 34 | #include "dwarf2dbg.h" |
| 35 | #include "dw2gencfi.h" |
| 36 | |
| 37 | /* Check assumptions made in this file. */ |
| 38 | typedef char static_assert1[sizeof (offsetT) < 8 ? -1 : 1]; |
| 39 | typedef char static_assert2[sizeof (valueT) < 8 ? -1 : 1]; |
| 40 | |
| 41 | #ifdef DEBUG |
| 42 | #define DBG(x) printf x |
| 43 | #else |
| 44 | #define DBG(x) |
| 45 | #endif |
| 46 | |
| 47 | #define SKIP_SPACE_TABS(S) \ |
| 48 | do { while (*(S) == ' ' || *(S) == '\t') ++(S); } while (0) |
| 49 | |
| 50 | /* Clean up namespace so we can include obj-elf.h too. */ |
| 51 | static int mips_output_flavor (void); |
| 52 | static int mips_output_flavor (void) { return OUTPUT_FLAVOR; } |
| 53 | #undef OBJ_PROCESS_STAB |
| 54 | #undef OUTPUT_FLAVOR |
| 55 | #undef S_GET_ALIGN |
| 56 | #undef S_GET_SIZE |
| 57 | #undef S_SET_ALIGN |
| 58 | #undef S_SET_SIZE |
| 59 | #undef obj_frob_file |
| 60 | #undef obj_frob_file_after_relocs |
| 61 | #undef obj_frob_symbol |
| 62 | #undef obj_pop_insert |
| 63 | #undef obj_sec_sym_ok_for_reloc |
| 64 | #undef OBJ_COPY_SYMBOL_ATTRIBUTES |
| 65 | |
| 66 | #include "obj-elf.h" |
| 67 | /* Fix any of them that we actually care about. */ |
| 68 | #undef OUTPUT_FLAVOR |
| 69 | #define OUTPUT_FLAVOR mips_output_flavor() |
| 70 | |
| 71 | #include "elf/mips.h" |
| 72 | |
| 73 | #ifndef ECOFF_DEBUGGING |
| 74 | #define NO_ECOFF_DEBUGGING |
| 75 | #define ECOFF_DEBUGGING 0 |
| 76 | #endif |
| 77 | |
| 78 | int mips_flag_mdebug = -1; |
| 79 | |
| 80 | /* Control generation of .pdr sections. Off by default on IRIX: the native |
| 81 | linker doesn't know about and discards them, but relocations against them |
| 82 | remain, leading to rld crashes. */ |
| 83 | #ifdef TE_IRIX |
| 84 | int mips_flag_pdr = FALSE; |
| 85 | #else |
| 86 | int mips_flag_pdr = TRUE; |
| 87 | #endif |
| 88 | |
| 89 | #include "ecoff.h" |
| 90 | |
| 91 | static char *mips_regmask_frag; |
| 92 | |
| 93 | #define ZERO 0 |
| 94 | #define ATREG 1 |
| 95 | #define S0 16 |
| 96 | #define S7 23 |
| 97 | #define TREG 24 |
| 98 | #define PIC_CALL_REG 25 |
| 99 | #define KT0 26 |
| 100 | #define KT1 27 |
| 101 | #define GP 28 |
| 102 | #define SP 29 |
| 103 | #define FP 30 |
| 104 | #define RA 31 |
| 105 | |
| 106 | #define ILLEGAL_REG (32) |
| 107 | |
| 108 | #define AT mips_opts.at |
| 109 | |
| 110 | extern int target_big_endian; |
| 111 | |
| 112 | /* The name of the readonly data section. */ |
| 113 | #define RDATA_SECTION_NAME ".rodata" |
| 114 | |
| 115 | /* Ways in which an instruction can be "appended" to the output. */ |
| 116 | enum append_method { |
| 117 | /* Just add it normally. */ |
| 118 | APPEND_ADD, |
| 119 | |
| 120 | /* Add it normally and then add a nop. */ |
| 121 | APPEND_ADD_WITH_NOP, |
| 122 | |
| 123 | /* Turn an instruction with a delay slot into a "compact" version. */ |
| 124 | APPEND_ADD_COMPACT, |
| 125 | |
| 126 | /* Insert the instruction before the last one. */ |
| 127 | APPEND_SWAP |
| 128 | }; |
| 129 | |
| 130 | /* Information about an instruction, including its format, operands |
| 131 | and fixups. */ |
| 132 | struct mips_cl_insn |
| 133 | { |
| 134 | /* The opcode's entry in mips_opcodes or mips16_opcodes. */ |
| 135 | const struct mips_opcode *insn_mo; |
| 136 | |
| 137 | /* The 16-bit or 32-bit bitstring of the instruction itself. This is |
| 138 | a copy of INSN_MO->match with the operands filled in. If we have |
| 139 | decided to use an extended MIPS16 instruction, this includes the |
| 140 | extension. */ |
| 141 | unsigned long insn_opcode; |
| 142 | |
| 143 | /* The frag that contains the instruction. */ |
| 144 | struct frag *frag; |
| 145 | |
| 146 | /* The offset into FRAG of the first instruction byte. */ |
| 147 | long where; |
| 148 | |
| 149 | /* The relocs associated with the instruction, if any. */ |
| 150 | fixS *fixp[3]; |
| 151 | |
| 152 | /* True if this entry cannot be moved from its current position. */ |
| 153 | unsigned int fixed_p : 1; |
| 154 | |
| 155 | /* True if this instruction occurred in a .set noreorder block. */ |
| 156 | unsigned int noreorder_p : 1; |
| 157 | |
| 158 | /* True for mips16 instructions that jump to an absolute address. */ |
| 159 | unsigned int mips16_absolute_jump_p : 1; |
| 160 | |
| 161 | /* True if this instruction is complete. */ |
| 162 | unsigned int complete_p : 1; |
| 163 | |
| 164 | /* True if this instruction is cleared from history by unconditional |
| 165 | branch. */ |
| 166 | unsigned int cleared_p : 1; |
| 167 | }; |
| 168 | |
| 169 | /* The ABI to use. */ |
| 170 | enum mips_abi_level |
| 171 | { |
| 172 | NO_ABI = 0, |
| 173 | O32_ABI, |
| 174 | O64_ABI, |
| 175 | N32_ABI, |
| 176 | N64_ABI, |
| 177 | EABI_ABI |
| 178 | }; |
| 179 | |
| 180 | /* MIPS ABI we are using for this output file. */ |
| 181 | static enum mips_abi_level mips_abi = NO_ABI; |
| 182 | |
| 183 | /* Whether or not we have code that can call pic code. */ |
| 184 | int mips_abicalls = FALSE; |
| 185 | |
| 186 | /* Whether or not we have code which can be put into a shared |
| 187 | library. */ |
| 188 | static bfd_boolean mips_in_shared = TRUE; |
| 189 | |
| 190 | /* This is the set of options which may be modified by the .set |
| 191 | pseudo-op. We use a struct so that .set push and .set pop are more |
| 192 | reliable. */ |
| 193 | |
| 194 | struct mips_set_options |
| 195 | { |
| 196 | /* MIPS ISA (Instruction Set Architecture) level. This is set to -1 |
| 197 | if it has not been initialized. Changed by `.set mipsN', and the |
| 198 | -mipsN command line option, and the default CPU. */ |
| 199 | int isa; |
| 200 | /* Enabled Application Specific Extensions (ASEs). Changed by `.set |
| 201 | <asename>', by command line options, and based on the default |
| 202 | architecture. */ |
| 203 | int ase; |
| 204 | /* Whether we are assembling for the mips16 processor. 0 if we are |
| 205 | not, 1 if we are, and -1 if the value has not been initialized. |
| 206 | Changed by `.set mips16' and `.set nomips16', and the -mips16 and |
| 207 | -nomips16 command line options, and the default CPU. */ |
| 208 | int mips16; |
| 209 | /* Whether we are assembling for the mipsMIPS ASE. 0 if we are not, |
| 210 | 1 if we are, and -1 if the value has not been initialized. Changed |
| 211 | by `.set micromips' and `.set nomicromips', and the -mmicromips |
| 212 | and -mno-micromips command line options, and the default CPU. */ |
| 213 | int micromips; |
| 214 | /* Non-zero if we should not reorder instructions. Changed by `.set |
| 215 | reorder' and `.set noreorder'. */ |
| 216 | int noreorder; |
| 217 | /* Non-zero if we should not permit the register designated "assembler |
| 218 | temporary" to be used in instructions. The value is the register |
| 219 | number, normally $at ($1). Changed by `.set at=REG', `.set noat' |
| 220 | (same as `.set at=$0') and `.set at' (same as `.set at=$1'). */ |
| 221 | unsigned int at; |
| 222 | /* Non-zero if we should warn when a macro instruction expands into |
| 223 | more than one machine instruction. Changed by `.set nomacro' and |
| 224 | `.set macro'. */ |
| 225 | int warn_about_macros; |
| 226 | /* Non-zero if we should not move instructions. Changed by `.set |
| 227 | move', `.set volatile', `.set nomove', and `.set novolatile'. */ |
| 228 | int nomove; |
| 229 | /* Non-zero if we should not optimize branches by moving the target |
| 230 | of the branch into the delay slot. Actually, we don't perform |
| 231 | this optimization anyhow. Changed by `.set bopt' and `.set |
| 232 | nobopt'. */ |
| 233 | int nobopt; |
| 234 | /* Non-zero if we should not autoextend mips16 instructions. |
| 235 | Changed by `.set autoextend' and `.set noautoextend'. */ |
| 236 | int noautoextend; |
| 237 | /* True if we should only emit 32-bit microMIPS instructions. |
| 238 | Changed by `.set insn32' and `.set noinsn32', and the -minsn32 |
| 239 | and -mno-insn32 command line options. */ |
| 240 | bfd_boolean insn32; |
| 241 | /* Restrict general purpose registers and floating point registers |
| 242 | to 32 bit. This is initially determined when -mgp32 or -mfp32 |
| 243 | is passed but can changed if the assembler code uses .set mipsN. */ |
| 244 | int gp32; |
| 245 | int fp32; |
| 246 | /* MIPS architecture (CPU) type. Changed by .set arch=FOO, the -march |
| 247 | command line option, and the default CPU. */ |
| 248 | int arch; |
| 249 | /* True if ".set sym32" is in effect. */ |
| 250 | bfd_boolean sym32; |
| 251 | /* True if floating-point operations are not allowed. Changed by .set |
| 252 | softfloat or .set hardfloat, by command line options -msoft-float or |
| 253 | -mhard-float. The default is false. */ |
| 254 | bfd_boolean soft_float; |
| 255 | |
| 256 | /* True if only single-precision floating-point operations are allowed. |
| 257 | Changed by .set singlefloat or .set doublefloat, command-line options |
| 258 | -msingle-float or -mdouble-float. The default is false. */ |
| 259 | bfd_boolean single_float; |
| 260 | }; |
| 261 | |
| 262 | /* This is the struct we use to hold the current set of options. Note |
| 263 | that we must set the isa field to ISA_UNKNOWN and the ASE fields to |
| 264 | -1 to indicate that they have not been initialized. */ |
| 265 | |
| 266 | /* True if -mgp32 was passed. */ |
| 267 | static int file_mips_gp32 = -1; |
| 268 | |
| 269 | /* True if -mfp32 was passed. */ |
| 270 | static int file_mips_fp32 = -1; |
| 271 | |
| 272 | /* 1 if -msoft-float, 0 if -mhard-float. The default is 0. */ |
| 273 | static int file_mips_soft_float = 0; |
| 274 | |
| 275 | /* 1 if -msingle-float, 0 if -mdouble-float. The default is 0. */ |
| 276 | static int file_mips_single_float = 0; |
| 277 | |
| 278 | /* True if -mnan=2008, false if -mnan=legacy. */ |
| 279 | static bfd_boolean mips_flag_nan2008 = FALSE; |
| 280 | |
| 281 | static struct mips_set_options mips_opts = |
| 282 | { |
| 283 | /* isa */ ISA_UNKNOWN, /* ase */ 0, /* mips16 */ -1, /* micromips */ -1, |
| 284 | /* noreorder */ 0, /* at */ ATREG, /* warn_about_macros */ 0, |
| 285 | /* nomove */ 0, /* nobopt */ 0, /* noautoextend */ 0, /* insn32 */ FALSE, |
| 286 | /* gp32 */ 0, /* fp32 */ 0, /* arch */ CPU_UNKNOWN, /* sym32 */ FALSE, |
| 287 | /* soft_float */ FALSE, /* single_float */ FALSE |
| 288 | }; |
| 289 | |
| 290 | /* The set of ASEs that were selected on the command line, either |
| 291 | explicitly via ASE options or implicitly through things like -march. */ |
| 292 | static unsigned int file_ase; |
| 293 | |
| 294 | /* Which bits of file_ase were explicitly set or cleared by ASE options. */ |
| 295 | static unsigned int file_ase_explicit; |
| 296 | |
| 297 | /* These variables are filled in with the masks of registers used. |
| 298 | The object format code reads them and puts them in the appropriate |
| 299 | place. */ |
| 300 | unsigned long mips_gprmask; |
| 301 | unsigned long mips_cprmask[4]; |
| 302 | |
| 303 | /* MIPS ISA we are using for this output file. */ |
| 304 | static int file_mips_isa = ISA_UNKNOWN; |
| 305 | |
| 306 | /* True if any MIPS16 code was produced. */ |
| 307 | static int file_ase_mips16; |
| 308 | |
| 309 | #define ISA_SUPPORTS_MIPS16E (mips_opts.isa == ISA_MIPS32 \ |
| 310 | || mips_opts.isa == ISA_MIPS32R2 \ |
| 311 | || mips_opts.isa == ISA_MIPS64 \ |
| 312 | || mips_opts.isa == ISA_MIPS64R2) |
| 313 | |
| 314 | /* True if any microMIPS code was produced. */ |
| 315 | static int file_ase_micromips; |
| 316 | |
| 317 | /* True if we want to create R_MIPS_JALR for jalr $25. */ |
| 318 | #ifdef TE_IRIX |
| 319 | #define MIPS_JALR_HINT_P(EXPR) HAVE_NEWABI |
| 320 | #else |
| 321 | /* As a GNU extension, we use R_MIPS_JALR for o32 too. However, |
| 322 | because there's no place for any addend, the only acceptable |
| 323 | expression is a bare symbol. */ |
| 324 | #define MIPS_JALR_HINT_P(EXPR) \ |
| 325 | (!HAVE_IN_PLACE_ADDENDS \ |
| 326 | || ((EXPR)->X_op == O_symbol && (EXPR)->X_add_number == 0)) |
| 327 | #endif |
| 328 | |
| 329 | /* The argument of the -march= flag. The architecture we are assembling. */ |
| 330 | static int file_mips_arch = CPU_UNKNOWN; |
| 331 | static const char *mips_arch_string; |
| 332 | |
| 333 | /* The argument of the -mtune= flag. The architecture for which we |
| 334 | are optimizing. */ |
| 335 | static int mips_tune = CPU_UNKNOWN; |
| 336 | static const char *mips_tune_string; |
| 337 | |
| 338 | /* True when generating 32-bit code for a 64-bit processor. */ |
| 339 | static int mips_32bitmode = 0; |
| 340 | |
| 341 | /* True if the given ABI requires 32-bit registers. */ |
| 342 | #define ABI_NEEDS_32BIT_REGS(ABI) ((ABI) == O32_ABI) |
| 343 | |
| 344 | /* Likewise 64-bit registers. */ |
| 345 | #define ABI_NEEDS_64BIT_REGS(ABI) \ |
| 346 | ((ABI) == N32_ABI \ |
| 347 | || (ABI) == N64_ABI \ |
| 348 | || (ABI) == O64_ABI) |
| 349 | |
| 350 | /* Return true if ISA supports 64 bit wide gp registers. */ |
| 351 | #define ISA_HAS_64BIT_REGS(ISA) \ |
| 352 | ((ISA) == ISA_MIPS3 \ |
| 353 | || (ISA) == ISA_MIPS4 \ |
| 354 | || (ISA) == ISA_MIPS5 \ |
| 355 | || (ISA) == ISA_MIPS64 \ |
| 356 | || (ISA) == ISA_MIPS64R2) |
| 357 | |
| 358 | /* Return true if ISA supports 64 bit wide float registers. */ |
| 359 | #define ISA_HAS_64BIT_FPRS(ISA) \ |
| 360 | ((ISA) == ISA_MIPS3 \ |
| 361 | || (ISA) == ISA_MIPS4 \ |
| 362 | || (ISA) == ISA_MIPS5 \ |
| 363 | || (ISA) == ISA_MIPS32R2 \ |
| 364 | || (ISA) == ISA_MIPS64 \ |
| 365 | || (ISA) == ISA_MIPS64R2) |
| 366 | |
| 367 | /* Return true if ISA supports 64-bit right rotate (dror et al.) |
| 368 | instructions. */ |
| 369 | #define ISA_HAS_DROR(ISA) \ |
| 370 | ((ISA) == ISA_MIPS64R2 \ |
| 371 | || (mips_opts.micromips \ |
| 372 | && ISA_HAS_64BIT_REGS (ISA)) \ |
| 373 | ) |
| 374 | |
| 375 | /* Return true if ISA supports 32-bit right rotate (ror et al.) |
| 376 | instructions. */ |
| 377 | #define ISA_HAS_ROR(ISA) \ |
| 378 | ((ISA) == ISA_MIPS32R2 \ |
| 379 | || (ISA) == ISA_MIPS64R2 \ |
| 380 | || (mips_opts.ase & ASE_SMARTMIPS) \ |
| 381 | || mips_opts.micromips \ |
| 382 | ) |
| 383 | |
| 384 | /* Return true if ISA supports single-precision floats in odd registers. */ |
| 385 | #define ISA_HAS_ODD_SINGLE_FPR(ISA) \ |
| 386 | ((ISA) == ISA_MIPS32 \ |
| 387 | || (ISA) == ISA_MIPS32R2 \ |
| 388 | || (ISA) == ISA_MIPS64 \ |
| 389 | || (ISA) == ISA_MIPS64R2) |
| 390 | |
| 391 | /* Return true if ISA supports move to/from high part of a 64-bit |
| 392 | floating-point register. */ |
| 393 | #define ISA_HAS_MXHC1(ISA) \ |
| 394 | ((ISA) == ISA_MIPS32R2 \ |
| 395 | || (ISA) == ISA_MIPS64R2) |
| 396 | |
| 397 | #define HAVE_32BIT_GPRS \ |
| 398 | (mips_opts.gp32 || !ISA_HAS_64BIT_REGS (mips_opts.isa)) |
| 399 | |
| 400 | #define HAVE_32BIT_FPRS \ |
| 401 | (mips_opts.fp32 || !ISA_HAS_64BIT_FPRS (mips_opts.isa)) |
| 402 | |
| 403 | #define HAVE_64BIT_GPRS (!HAVE_32BIT_GPRS) |
| 404 | #define HAVE_64BIT_FPRS (!HAVE_32BIT_FPRS) |
| 405 | |
| 406 | #define HAVE_NEWABI (mips_abi == N32_ABI || mips_abi == N64_ABI) |
| 407 | |
| 408 | #define HAVE_64BIT_OBJECTS (mips_abi == N64_ABI) |
| 409 | |
| 410 | /* True if relocations are stored in-place. */ |
| 411 | #define HAVE_IN_PLACE_ADDENDS (!HAVE_NEWABI) |
| 412 | |
| 413 | /* The ABI-derived address size. */ |
| 414 | #define HAVE_64BIT_ADDRESSES \ |
| 415 | (HAVE_64BIT_GPRS && (mips_abi == EABI_ABI || mips_abi == N64_ABI)) |
| 416 | #define HAVE_32BIT_ADDRESSES (!HAVE_64BIT_ADDRESSES) |
| 417 | |
| 418 | /* The size of symbolic constants (i.e., expressions of the form |
| 419 | "SYMBOL" or "SYMBOL + OFFSET"). */ |
| 420 | #define HAVE_32BIT_SYMBOLS \ |
| 421 | (HAVE_32BIT_ADDRESSES || !HAVE_64BIT_OBJECTS || mips_opts.sym32) |
| 422 | #define HAVE_64BIT_SYMBOLS (!HAVE_32BIT_SYMBOLS) |
| 423 | |
| 424 | /* Addresses are loaded in different ways, depending on the address size |
| 425 | in use. The n32 ABI Documentation also mandates the use of additions |
| 426 | with overflow checking, but existing implementations don't follow it. */ |
| 427 | #define ADDRESS_ADD_INSN \ |
| 428 | (HAVE_32BIT_ADDRESSES ? "addu" : "daddu") |
| 429 | |
| 430 | #define ADDRESS_ADDI_INSN \ |
| 431 | (HAVE_32BIT_ADDRESSES ? "addiu" : "daddiu") |
| 432 | |
| 433 | #define ADDRESS_LOAD_INSN \ |
| 434 | (HAVE_32BIT_ADDRESSES ? "lw" : "ld") |
| 435 | |
| 436 | #define ADDRESS_STORE_INSN \ |
| 437 | (HAVE_32BIT_ADDRESSES ? "sw" : "sd") |
| 438 | |
| 439 | /* Return true if the given CPU supports the MIPS16 ASE. */ |
| 440 | #define CPU_HAS_MIPS16(cpu) \ |
| 441 | (strncmp (TARGET_CPU, "mips16", sizeof ("mips16") - 1) == 0 \ |
| 442 | || strncmp (TARGET_CANONICAL, "mips-lsi-elf", sizeof ("mips-lsi-elf") - 1) == 0) |
| 443 | |
| 444 | /* Return true if the given CPU supports the microMIPS ASE. */ |
| 445 | #define CPU_HAS_MICROMIPS(cpu) 0 |
| 446 | |
| 447 | /* True if CPU has a dror instruction. */ |
| 448 | #define CPU_HAS_DROR(CPU) ((CPU) == CPU_VR5400 || (CPU) == CPU_VR5500) |
| 449 | |
| 450 | /* True if CPU has a ror instruction. */ |
| 451 | #define CPU_HAS_ROR(CPU) CPU_HAS_DROR (CPU) |
| 452 | |
| 453 | /* True if CPU is in the Octeon family */ |
| 454 | #define CPU_IS_OCTEON(CPU) ((CPU) == CPU_OCTEON || (CPU) == CPU_OCTEONP || (CPU) == CPU_OCTEON2) |
| 455 | |
| 456 | /* True if CPU has seq/sne and seqi/snei instructions. */ |
| 457 | #define CPU_HAS_SEQ(CPU) (CPU_IS_OCTEON (CPU)) |
| 458 | |
| 459 | /* True, if CPU has support for ldc1 and sdc1. */ |
| 460 | #define CPU_HAS_LDC1_SDC1(CPU) \ |
| 461 | ((mips_opts.isa != ISA_MIPS1) && ((CPU) != CPU_R5900)) |
| 462 | |
| 463 | /* True if mflo and mfhi can be immediately followed by instructions |
| 464 | which write to the HI and LO registers. |
| 465 | |
| 466 | According to MIPS specifications, MIPS ISAs I, II, and III need |
| 467 | (at least) two instructions between the reads of HI/LO and |
| 468 | instructions which write them, and later ISAs do not. Contradicting |
| 469 | the MIPS specifications, some MIPS IV processor user manuals (e.g. |
| 470 | the UM for the NEC Vr5000) document needing the instructions between |
| 471 | HI/LO reads and writes, as well. Therefore, we declare only MIPS32, |
| 472 | MIPS64 and later ISAs to have the interlocks, plus any specific |
| 473 | earlier-ISA CPUs for which CPU documentation declares that the |
| 474 | instructions are really interlocked. */ |
| 475 | #define hilo_interlocks \ |
| 476 | (mips_opts.isa == ISA_MIPS32 \ |
| 477 | || mips_opts.isa == ISA_MIPS32R2 \ |
| 478 | || mips_opts.isa == ISA_MIPS64 \ |
| 479 | || mips_opts.isa == ISA_MIPS64R2 \ |
| 480 | || mips_opts.arch == CPU_R4010 \ |
| 481 | || mips_opts.arch == CPU_R5900 \ |
| 482 | || mips_opts.arch == CPU_R10000 \ |
| 483 | || mips_opts.arch == CPU_R12000 \ |
| 484 | || mips_opts.arch == CPU_R14000 \ |
| 485 | || mips_opts.arch == CPU_R16000 \ |
| 486 | || mips_opts.arch == CPU_RM7000 \ |
| 487 | || mips_opts.arch == CPU_VR5500 \ |
| 488 | || mips_opts.micromips \ |
| 489 | ) |
| 490 | |
| 491 | /* Whether the processor uses hardware interlocks to protect reads |
| 492 | from the GPRs after they are loaded from memory, and thus does not |
| 493 | require nops to be inserted. This applies to instructions marked |
| 494 | INSN_LOAD_MEMORY_DELAY. These nops are only required at MIPS ISA |
| 495 | level I and microMIPS mode instructions are always interlocked. */ |
| 496 | #define gpr_interlocks \ |
| 497 | (mips_opts.isa != ISA_MIPS1 \ |
| 498 | || mips_opts.arch == CPU_R3900 \ |
| 499 | || mips_opts.arch == CPU_R5900 \ |
| 500 | || mips_opts.micromips \ |
| 501 | ) |
| 502 | |
| 503 | /* Whether the processor uses hardware interlocks to avoid delays |
| 504 | required by coprocessor instructions, and thus does not require |
| 505 | nops to be inserted. This applies to instructions marked |
| 506 | INSN_LOAD_COPROC_DELAY, INSN_COPROC_MOVE_DELAY, and to delays |
| 507 | between instructions marked INSN_WRITE_COND_CODE and ones marked |
| 508 | INSN_READ_COND_CODE. These nops are only required at MIPS ISA |
| 509 | levels I, II, and III and microMIPS mode instructions are always |
| 510 | interlocked. */ |
| 511 | /* Itbl support may require additional care here. */ |
| 512 | #define cop_interlocks \ |
| 513 | ((mips_opts.isa != ISA_MIPS1 \ |
| 514 | && mips_opts.isa != ISA_MIPS2 \ |
| 515 | && mips_opts.isa != ISA_MIPS3) \ |
| 516 | || mips_opts.arch == CPU_R4300 \ |
| 517 | || mips_opts.micromips \ |
| 518 | ) |
| 519 | |
| 520 | /* Whether the processor uses hardware interlocks to protect reads |
| 521 | from coprocessor registers after they are loaded from memory, and |
| 522 | thus does not require nops to be inserted. This applies to |
| 523 | instructions marked INSN_COPROC_MEMORY_DELAY. These nops are only |
| 524 | requires at MIPS ISA level I and microMIPS mode instructions are |
| 525 | always interlocked. */ |
| 526 | #define cop_mem_interlocks \ |
| 527 | (mips_opts.isa != ISA_MIPS1 \ |
| 528 | || mips_opts.micromips \ |
| 529 | ) |
| 530 | |
| 531 | /* Is this a mfhi or mflo instruction? */ |
| 532 | #define MF_HILO_INSN(PINFO) \ |
| 533 | ((PINFO & INSN_READ_HI) || (PINFO & INSN_READ_LO)) |
| 534 | |
| 535 | /* Whether code compression (either of the MIPS16 or the microMIPS ASEs) |
| 536 | has been selected. This implies, in particular, that addresses of text |
| 537 | labels have their LSB set. */ |
| 538 | #define HAVE_CODE_COMPRESSION \ |
| 539 | ((mips_opts.mips16 | mips_opts.micromips) != 0) |
| 540 | |
| 541 | /* The minimum and maximum signed values that can be stored in a GPR. */ |
| 542 | #define GPR_SMAX ((offsetT) (((valueT) 1 << (HAVE_64BIT_GPRS ? 63 : 31)) - 1)) |
| 543 | #define GPR_SMIN (-GPR_SMAX - 1) |
| 544 | |
| 545 | /* MIPS PIC level. */ |
| 546 | |
| 547 | enum mips_pic_level mips_pic; |
| 548 | |
| 549 | /* 1 if we should generate 32 bit offsets from the $gp register in |
| 550 | SVR4_PIC mode. Currently has no meaning in other modes. */ |
| 551 | static int mips_big_got = 0; |
| 552 | |
| 553 | /* 1 if trap instructions should used for overflow rather than break |
| 554 | instructions. */ |
| 555 | static int mips_trap = 0; |
| 556 | |
| 557 | /* 1 if double width floating point constants should not be constructed |
| 558 | by assembling two single width halves into two single width floating |
| 559 | point registers which just happen to alias the double width destination |
| 560 | register. On some architectures this aliasing can be disabled by a bit |
| 561 | in the status register, and the setting of this bit cannot be determined |
| 562 | automatically at assemble time. */ |
| 563 | static int mips_disable_float_construction; |
| 564 | |
| 565 | /* Non-zero if any .set noreorder directives were used. */ |
| 566 | |
| 567 | static int mips_any_noreorder; |
| 568 | |
| 569 | /* Non-zero if nops should be inserted when the register referenced in |
| 570 | an mfhi/mflo instruction is read in the next two instructions. */ |
| 571 | static int mips_7000_hilo_fix; |
| 572 | |
| 573 | /* The size of objects in the small data section. */ |
| 574 | static unsigned int g_switch_value = 8; |
| 575 | /* Whether the -G option was used. */ |
| 576 | static int g_switch_seen = 0; |
| 577 | |
| 578 | #define N_RMASK 0xc4 |
| 579 | #define N_VFP 0xd4 |
| 580 | |
| 581 | /* If we can determine in advance that GP optimization won't be |
| 582 | possible, we can skip the relaxation stuff that tries to produce |
| 583 | GP-relative references. This makes delay slot optimization work |
| 584 | better. |
| 585 | |
| 586 | This function can only provide a guess, but it seems to work for |
| 587 | gcc output. It needs to guess right for gcc, otherwise gcc |
| 588 | will put what it thinks is a GP-relative instruction in a branch |
| 589 | delay slot. |
| 590 | |
| 591 | I don't know if a fix is needed for the SVR4_PIC mode. I've only |
| 592 | fixed it for the non-PIC mode. KR 95/04/07 */ |
| 593 | static int nopic_need_relax (symbolS *, int); |
| 594 | |
| 595 | /* handle of the OPCODE hash table */ |
| 596 | static struct hash_control *op_hash = NULL; |
| 597 | |
| 598 | /* The opcode hash table we use for the mips16. */ |
| 599 | static struct hash_control *mips16_op_hash = NULL; |
| 600 | |
| 601 | /* The opcode hash table we use for the microMIPS ASE. */ |
| 602 | static struct hash_control *micromips_op_hash = NULL; |
| 603 | |
| 604 | /* This array holds the chars that always start a comment. If the |
| 605 | pre-processor is disabled, these aren't very useful */ |
| 606 | const char comment_chars[] = "#"; |
| 607 | |
| 608 | /* This array holds the chars that only start a comment at the beginning of |
| 609 | a line. If the line seems to have the form '# 123 filename' |
| 610 | .line and .file directives will appear in the pre-processed output */ |
| 611 | /* Note that input_file.c hand checks for '#' at the beginning of the |
| 612 | first line of the input file. This is because the compiler outputs |
| 613 | #NO_APP at the beginning of its output. */ |
| 614 | /* Also note that C style comments are always supported. */ |
| 615 | const char line_comment_chars[] = "#"; |
| 616 | |
| 617 | /* This array holds machine specific line separator characters. */ |
| 618 | const char line_separator_chars[] = ";"; |
| 619 | |
| 620 | /* Chars that can be used to separate mant from exp in floating point nums */ |
| 621 | const char EXP_CHARS[] = "eE"; |
| 622 | |
| 623 | /* Chars that mean this number is a floating point constant */ |
| 624 | /* As in 0f12.456 */ |
| 625 | /* or 0d1.2345e12 */ |
| 626 | const char FLT_CHARS[] = "rRsSfFdDxXpP"; |
| 627 | |
| 628 | /* Also be aware that MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT may have to be |
| 629 | changed in read.c . Ideally it shouldn't have to know about it at all, |
| 630 | but nothing is ideal around here. |
| 631 | */ |
| 632 | |
| 633 | /* Types of printf format used for instruction-related error messages. |
| 634 | "I" means int ("%d") and "S" means string ("%s"). */ |
| 635 | enum mips_insn_error_format { |
| 636 | ERR_FMT_PLAIN, |
| 637 | ERR_FMT_I, |
| 638 | ERR_FMT_SS, |
| 639 | }; |
| 640 | |
| 641 | /* Information about an error that was found while assembling the current |
| 642 | instruction. */ |
| 643 | struct mips_insn_error { |
| 644 | /* We sometimes need to match an instruction against more than one |
| 645 | opcode table entry. Errors found during this matching are reported |
| 646 | against a particular syntactic argument rather than against the |
| 647 | instruction as a whole. We grade these messages so that errors |
| 648 | against argument N have a greater priority than an error against |
| 649 | any argument < N, since the former implies that arguments up to N |
| 650 | were acceptable and that the opcode entry was therefore a closer match. |
| 651 | If several matches report an error against the same argument, |
| 652 | we only use that error if it is the same in all cases. |
| 653 | |
| 654 | min_argnum is the minimum argument number for which an error message |
| 655 | should be accepted. It is 0 if MSG is against the instruction as |
| 656 | a whole. */ |
| 657 | int min_argnum; |
| 658 | |
| 659 | /* The printf()-style message, including its format and arguments. */ |
| 660 | enum mips_insn_error_format format; |
| 661 | const char *msg; |
| 662 | union { |
| 663 | int i; |
| 664 | const char *ss[2]; |
| 665 | } u; |
| 666 | }; |
| 667 | |
| 668 | /* The error that should be reported for the current instruction. */ |
| 669 | static struct mips_insn_error insn_error; |
| 670 | |
| 671 | static int auto_align = 1; |
| 672 | |
| 673 | /* When outputting SVR4 PIC code, the assembler needs to know the |
| 674 | offset in the stack frame from which to restore the $gp register. |
| 675 | This is set by the .cprestore pseudo-op, and saved in this |
| 676 | variable. */ |
| 677 | static offsetT mips_cprestore_offset = -1; |
| 678 | |
| 679 | /* Similar for NewABI PIC code, where $gp is callee-saved. NewABI has some |
| 680 | more optimizations, it can use a register value instead of a memory-saved |
| 681 | offset and even an other register than $gp as global pointer. */ |
| 682 | static offsetT mips_cpreturn_offset = -1; |
| 683 | static int mips_cpreturn_register = -1; |
| 684 | static int mips_gp_register = GP; |
| 685 | static int mips_gprel_offset = 0; |
| 686 | |
| 687 | /* Whether mips_cprestore_offset has been set in the current function |
| 688 | (or whether it has already been warned about, if not). */ |
| 689 | static int mips_cprestore_valid = 0; |
| 690 | |
| 691 | /* This is the register which holds the stack frame, as set by the |
| 692 | .frame pseudo-op. This is needed to implement .cprestore. */ |
| 693 | static int mips_frame_reg = SP; |
| 694 | |
| 695 | /* Whether mips_frame_reg has been set in the current function |
| 696 | (or whether it has already been warned about, if not). */ |
| 697 | static int mips_frame_reg_valid = 0; |
| 698 | |
| 699 | /* To output NOP instructions correctly, we need to keep information |
| 700 | about the previous two instructions. */ |
| 701 | |
| 702 | /* Whether we are optimizing. The default value of 2 means to remove |
| 703 | unneeded NOPs and swap branch instructions when possible. A value |
| 704 | of 1 means to not swap branches. A value of 0 means to always |
| 705 | insert NOPs. */ |
| 706 | static int mips_optimize = 2; |
| 707 | |
| 708 | /* Debugging level. -g sets this to 2. -gN sets this to N. -g0 is |
| 709 | equivalent to seeing no -g option at all. */ |
| 710 | static int mips_debug = 0; |
| 711 | |
| 712 | /* The maximum number of NOPs needed to avoid the VR4130 mflo/mfhi errata. */ |
| 713 | #define MAX_VR4130_NOPS 4 |
| 714 | |
| 715 | /* The maximum number of NOPs needed to fill delay slots. */ |
| 716 | #define MAX_DELAY_NOPS 2 |
| 717 | |
| 718 | /* The maximum number of NOPs needed for any purpose. */ |
| 719 | #define MAX_NOPS 4 |
| 720 | |
| 721 | /* A list of previous instructions, with index 0 being the most recent. |
| 722 | We need to look back MAX_NOPS instructions when filling delay slots |
| 723 | or working around processor errata. We need to look back one |
| 724 | instruction further if we're thinking about using history[0] to |
| 725 | fill a branch delay slot. */ |
| 726 | static struct mips_cl_insn history[1 + MAX_NOPS]; |
| 727 | |
| 728 | /* Arrays of operands for each instruction. */ |
| 729 | #define MAX_OPERANDS 6 |
| 730 | struct mips_operand_array { |
| 731 | const struct mips_operand *operand[MAX_OPERANDS]; |
| 732 | }; |
| 733 | static struct mips_operand_array *mips_operands; |
| 734 | static struct mips_operand_array *mips16_operands; |
| 735 | static struct mips_operand_array *micromips_operands; |
| 736 | |
| 737 | /* Nop instructions used by emit_nop. */ |
| 738 | static struct mips_cl_insn nop_insn; |
| 739 | static struct mips_cl_insn mips16_nop_insn; |
| 740 | static struct mips_cl_insn micromips_nop16_insn; |
| 741 | static struct mips_cl_insn micromips_nop32_insn; |
| 742 | |
| 743 | /* The appropriate nop for the current mode. */ |
| 744 | #define NOP_INSN (mips_opts.mips16 \ |
| 745 | ? &mips16_nop_insn \ |
| 746 | : (mips_opts.micromips \ |
| 747 | ? (mips_opts.insn32 \ |
| 748 | ? µmips_nop32_insn \ |
| 749 | : µmips_nop16_insn) \ |
| 750 | : &nop_insn)) |
| 751 | |
| 752 | /* The size of NOP_INSN in bytes. */ |
| 753 | #define NOP_INSN_SIZE ((mips_opts.mips16 \ |
| 754 | || (mips_opts.micromips && !mips_opts.insn32)) \ |
| 755 | ? 2 : 4) |
| 756 | |
| 757 | /* If this is set, it points to a frag holding nop instructions which |
| 758 | were inserted before the start of a noreorder section. If those |
| 759 | nops turn out to be unnecessary, the size of the frag can be |
| 760 | decreased. */ |
| 761 | static fragS *prev_nop_frag; |
| 762 | |
| 763 | /* The number of nop instructions we created in prev_nop_frag. */ |
| 764 | static int prev_nop_frag_holds; |
| 765 | |
| 766 | /* The number of nop instructions that we know we need in |
| 767 | prev_nop_frag. */ |
| 768 | static int prev_nop_frag_required; |
| 769 | |
| 770 | /* The number of instructions we've seen since prev_nop_frag. */ |
| 771 | static int prev_nop_frag_since; |
| 772 | |
| 773 | /* Relocations against symbols are sometimes done in two parts, with a HI |
| 774 | relocation and a LO relocation. Each relocation has only 16 bits of |
| 775 | space to store an addend. This means that in order for the linker to |
| 776 | handle carries correctly, it must be able to locate both the HI and |
| 777 | the LO relocation. This means that the relocations must appear in |
| 778 | order in the relocation table. |
| 779 | |
| 780 | In order to implement this, we keep track of each unmatched HI |
| 781 | relocation. We then sort them so that they immediately precede the |
| 782 | corresponding LO relocation. */ |
| 783 | |
| 784 | struct mips_hi_fixup |
| 785 | { |
| 786 | /* Next HI fixup. */ |
| 787 | struct mips_hi_fixup *next; |
| 788 | /* This fixup. */ |
| 789 | fixS *fixp; |
| 790 | /* The section this fixup is in. */ |
| 791 | segT seg; |
| 792 | }; |
| 793 | |
| 794 | /* The list of unmatched HI relocs. */ |
| 795 | |
| 796 | static struct mips_hi_fixup *mips_hi_fixup_list; |
| 797 | |
| 798 | /* The frag containing the last explicit relocation operator. |
| 799 | Null if explicit relocations have not been used. */ |
| 800 | |
| 801 | static fragS *prev_reloc_op_frag; |
| 802 | |
| 803 | /* Map mips16 register numbers to normal MIPS register numbers. */ |
| 804 | |
| 805 | static const unsigned int mips16_to_32_reg_map[] = |
| 806 | { |
| 807 | 16, 17, 2, 3, 4, 5, 6, 7 |
| 808 | }; |
| 809 | |
| 810 | /* Map microMIPS register numbers to normal MIPS register numbers. */ |
| 811 | |
| 812 | #define micromips_to_32_reg_d_map mips16_to_32_reg_map |
| 813 | |
| 814 | /* The microMIPS registers with type h. */ |
| 815 | static const unsigned int micromips_to_32_reg_h_map1[] = |
| 816 | { |
| 817 | 5, 5, 6, 4, 4, 4, 4, 4 |
| 818 | }; |
| 819 | static const unsigned int micromips_to_32_reg_h_map2[] = |
| 820 | { |
| 821 | 6, 7, 7, 21, 22, 5, 6, 7 |
| 822 | }; |
| 823 | |
| 824 | /* The microMIPS registers with type m. */ |
| 825 | static const unsigned int micromips_to_32_reg_m_map[] = |
| 826 | { |
| 827 | 0, 17, 2, 3, 16, 18, 19, 20 |
| 828 | }; |
| 829 | |
| 830 | #define micromips_to_32_reg_n_map micromips_to_32_reg_m_map |
| 831 | |
| 832 | /* Classifies the kind of instructions we're interested in when |
| 833 | implementing -mfix-vr4120. */ |
| 834 | enum fix_vr4120_class |
| 835 | { |
| 836 | FIX_VR4120_MACC, |
| 837 | FIX_VR4120_DMACC, |
| 838 | FIX_VR4120_MULT, |
| 839 | FIX_VR4120_DMULT, |
| 840 | FIX_VR4120_DIV, |
| 841 | FIX_VR4120_MTHILO, |
| 842 | NUM_FIX_VR4120_CLASSES |
| 843 | }; |
| 844 | |
| 845 | /* ...likewise -mfix-loongson2f-jump. */ |
| 846 | static bfd_boolean mips_fix_loongson2f_jump; |
| 847 | |
| 848 | /* ...likewise -mfix-loongson2f-nop. */ |
| 849 | static bfd_boolean mips_fix_loongson2f_nop; |
| 850 | |
| 851 | /* True if -mfix-loongson2f-nop or -mfix-loongson2f-jump passed. */ |
| 852 | static bfd_boolean mips_fix_loongson2f; |
| 853 | |
| 854 | /* Given two FIX_VR4120_* values X and Y, bit Y of element X is set if |
| 855 | there must be at least one other instruction between an instruction |
| 856 | of type X and an instruction of type Y. */ |
| 857 | static unsigned int vr4120_conflicts[NUM_FIX_VR4120_CLASSES]; |
| 858 | |
| 859 | /* True if -mfix-vr4120 is in force. */ |
| 860 | static int mips_fix_vr4120; |
| 861 | |
| 862 | /* ...likewise -mfix-vr4130. */ |
| 863 | static int mips_fix_vr4130; |
| 864 | |
| 865 | /* ...likewise -mfix-24k. */ |
| 866 | static int mips_fix_24k; |
| 867 | |
| 868 | /* ...likewise -mfix-cn63xxp1 */ |
| 869 | static bfd_boolean mips_fix_cn63xxp1; |
| 870 | |
| 871 | /* We don't relax branches by default, since this causes us to expand |
| 872 | `la .l2 - .l1' if there's a branch between .l1 and .l2, because we |
| 873 | fail to compute the offset before expanding the macro to the most |
| 874 | efficient expansion. */ |
| 875 | |
| 876 | static int mips_relax_branch; |
| 877 | \f |
| 878 | /* The expansion of many macros depends on the type of symbol that |
| 879 | they refer to. For example, when generating position-dependent code, |
| 880 | a macro that refers to a symbol may have two different expansions, |
| 881 | one which uses GP-relative addresses and one which uses absolute |
| 882 | addresses. When generating SVR4-style PIC, a macro may have |
| 883 | different expansions for local and global symbols. |
| 884 | |
| 885 | We handle these situations by generating both sequences and putting |
| 886 | them in variant frags. In position-dependent code, the first sequence |
| 887 | will be the GP-relative one and the second sequence will be the |
| 888 | absolute one. In SVR4 PIC, the first sequence will be for global |
| 889 | symbols and the second will be for local symbols. |
| 890 | |
| 891 | The frag's "subtype" is RELAX_ENCODE (FIRST, SECOND), where FIRST and |
| 892 | SECOND are the lengths of the two sequences in bytes. These fields |
| 893 | can be extracted using RELAX_FIRST() and RELAX_SECOND(). In addition, |
| 894 | the subtype has the following flags: |
| 895 | |
| 896 | RELAX_USE_SECOND |
| 897 | Set if it has been decided that we should use the second |
| 898 | sequence instead of the first. |
| 899 | |
| 900 | RELAX_SECOND_LONGER |
| 901 | Set in the first variant frag if the macro's second implementation |
| 902 | is longer than its first. This refers to the macro as a whole, |
| 903 | not an individual relaxation. |
| 904 | |
| 905 | RELAX_NOMACRO |
| 906 | Set in the first variant frag if the macro appeared in a .set nomacro |
| 907 | block and if one alternative requires a warning but the other does not. |
| 908 | |
| 909 | RELAX_DELAY_SLOT |
| 910 | Like RELAX_NOMACRO, but indicates that the macro appears in a branch |
| 911 | delay slot. |
| 912 | |
| 913 | RELAX_DELAY_SLOT_16BIT |
| 914 | Like RELAX_DELAY_SLOT, but indicates that the delay slot requires a |
| 915 | 16-bit instruction. |
| 916 | |
| 917 | RELAX_DELAY_SLOT_SIZE_FIRST |
| 918 | Like RELAX_DELAY_SLOT, but indicates that the first implementation of |
| 919 | the macro is of the wrong size for the branch delay slot. |
| 920 | |
| 921 | RELAX_DELAY_SLOT_SIZE_SECOND |
| 922 | Like RELAX_DELAY_SLOT, but indicates that the second implementation of |
| 923 | the macro is of the wrong size for the branch delay slot. |
| 924 | |
| 925 | The frag's "opcode" points to the first fixup for relaxable code. |
| 926 | |
| 927 | Relaxable macros are generated using a sequence such as: |
| 928 | |
| 929 | relax_start (SYMBOL); |
| 930 | ... generate first expansion ... |
| 931 | relax_switch (); |
| 932 | ... generate second expansion ... |
| 933 | relax_end (); |
| 934 | |
| 935 | The code and fixups for the unwanted alternative are discarded |
| 936 | by md_convert_frag. */ |
| 937 | #define RELAX_ENCODE(FIRST, SECOND) (((FIRST) << 8) | (SECOND)) |
| 938 | |
| 939 | #define RELAX_FIRST(X) (((X) >> 8) & 0xff) |
| 940 | #define RELAX_SECOND(X) ((X) & 0xff) |
| 941 | #define RELAX_USE_SECOND 0x10000 |
| 942 | #define RELAX_SECOND_LONGER 0x20000 |
| 943 | #define RELAX_NOMACRO 0x40000 |
| 944 | #define RELAX_DELAY_SLOT 0x80000 |
| 945 | #define RELAX_DELAY_SLOT_16BIT 0x100000 |
| 946 | #define RELAX_DELAY_SLOT_SIZE_FIRST 0x200000 |
| 947 | #define RELAX_DELAY_SLOT_SIZE_SECOND 0x400000 |
| 948 | |
| 949 | /* Branch without likely bit. If label is out of range, we turn: |
| 950 | |
| 951 | beq reg1, reg2, label |
| 952 | delay slot |
| 953 | |
| 954 | into |
| 955 | |
| 956 | bne reg1, reg2, 0f |
| 957 | nop |
| 958 | j label |
| 959 | 0: delay slot |
| 960 | |
| 961 | with the following opcode replacements: |
| 962 | |
| 963 | beq <-> bne |
| 964 | blez <-> bgtz |
| 965 | bltz <-> bgez |
| 966 | bc1f <-> bc1t |
| 967 | |
| 968 | bltzal <-> bgezal (with jal label instead of j label) |
| 969 | |
| 970 | Even though keeping the delay slot instruction in the delay slot of |
| 971 | the branch would be more efficient, it would be very tricky to do |
| 972 | correctly, because we'd have to introduce a variable frag *after* |
| 973 | the delay slot instruction, and expand that instead. Let's do it |
| 974 | the easy way for now, even if the branch-not-taken case now costs |
| 975 | one additional instruction. Out-of-range branches are not supposed |
| 976 | to be common, anyway. |
| 977 | |
| 978 | Branch likely. If label is out of range, we turn: |
| 979 | |
| 980 | beql reg1, reg2, label |
| 981 | delay slot (annulled if branch not taken) |
| 982 | |
| 983 | into |
| 984 | |
| 985 | beql reg1, reg2, 1f |
| 986 | nop |
| 987 | beql $0, $0, 2f |
| 988 | nop |
| 989 | 1: j[al] label |
| 990 | delay slot (executed only if branch taken) |
| 991 | 2: |
| 992 | |
| 993 | It would be possible to generate a shorter sequence by losing the |
| 994 | likely bit, generating something like: |
| 995 | |
| 996 | bne reg1, reg2, 0f |
| 997 | nop |
| 998 | j[al] label |
| 999 | delay slot (executed only if branch taken) |
| 1000 | 0: |
| 1001 | |
| 1002 | beql -> bne |
| 1003 | bnel -> beq |
| 1004 | blezl -> bgtz |
| 1005 | bgtzl -> blez |
| 1006 | bltzl -> bgez |
| 1007 | bgezl -> bltz |
| 1008 | bc1fl -> bc1t |
| 1009 | bc1tl -> bc1f |
| 1010 | |
| 1011 | bltzall -> bgezal (with jal label instead of j label) |
| 1012 | bgezall -> bltzal (ditto) |
| 1013 | |
| 1014 | |
| 1015 | but it's not clear that it would actually improve performance. */ |
| 1016 | #define RELAX_BRANCH_ENCODE(at, uncond, likely, link, toofar) \ |
| 1017 | ((relax_substateT) \ |
| 1018 | (0xc0000000 \ |
| 1019 | | ((at) & 0x1f) \ |
| 1020 | | ((toofar) ? 0x20 : 0) \ |
| 1021 | | ((link) ? 0x40 : 0) \ |
| 1022 | | ((likely) ? 0x80 : 0) \ |
| 1023 | | ((uncond) ? 0x100 : 0))) |
| 1024 | #define RELAX_BRANCH_P(i) (((i) & 0xf0000000) == 0xc0000000) |
| 1025 | #define RELAX_BRANCH_UNCOND(i) (((i) & 0x100) != 0) |
| 1026 | #define RELAX_BRANCH_LIKELY(i) (((i) & 0x80) != 0) |
| 1027 | #define RELAX_BRANCH_LINK(i) (((i) & 0x40) != 0) |
| 1028 | #define RELAX_BRANCH_TOOFAR(i) (((i) & 0x20) != 0) |
| 1029 | #define RELAX_BRANCH_AT(i) ((i) & 0x1f) |
| 1030 | |
| 1031 | /* For mips16 code, we use an entirely different form of relaxation. |
| 1032 | mips16 supports two versions of most instructions which take |
| 1033 | immediate values: a small one which takes some small value, and a |
| 1034 | larger one which takes a 16 bit value. Since branches also follow |
| 1035 | this pattern, relaxing these values is required. |
| 1036 | |
| 1037 | We can assemble both mips16 and normal MIPS code in a single |
| 1038 | object. Therefore, we need to support this type of relaxation at |
| 1039 | the same time that we support the relaxation described above. We |
| 1040 | use the high bit of the subtype field to distinguish these cases. |
| 1041 | |
| 1042 | The information we store for this type of relaxation is the |
| 1043 | argument code found in the opcode file for this relocation, whether |
| 1044 | the user explicitly requested a small or extended form, and whether |
| 1045 | the relocation is in a jump or jal delay slot. That tells us the |
| 1046 | size of the value, and how it should be stored. We also store |
| 1047 | whether the fragment is considered to be extended or not. We also |
| 1048 | store whether this is known to be a branch to a different section, |
| 1049 | whether we have tried to relax this frag yet, and whether we have |
| 1050 | ever extended a PC relative fragment because of a shift count. */ |
| 1051 | #define RELAX_MIPS16_ENCODE(type, small, ext, dslot, jal_dslot) \ |
| 1052 | (0x80000000 \ |
| 1053 | | ((type) & 0xff) \ |
| 1054 | | ((small) ? 0x100 : 0) \ |
| 1055 | | ((ext) ? 0x200 : 0) \ |
| 1056 | | ((dslot) ? 0x400 : 0) \ |
| 1057 | | ((jal_dslot) ? 0x800 : 0)) |
| 1058 | #define RELAX_MIPS16_P(i) (((i) & 0xc0000000) == 0x80000000) |
| 1059 | #define RELAX_MIPS16_TYPE(i) ((i) & 0xff) |
| 1060 | #define RELAX_MIPS16_USER_SMALL(i) (((i) & 0x100) != 0) |
| 1061 | #define RELAX_MIPS16_USER_EXT(i) (((i) & 0x200) != 0) |
| 1062 | #define RELAX_MIPS16_DSLOT(i) (((i) & 0x400) != 0) |
| 1063 | #define RELAX_MIPS16_JAL_DSLOT(i) (((i) & 0x800) != 0) |
| 1064 | #define RELAX_MIPS16_EXTENDED(i) (((i) & 0x1000) != 0) |
| 1065 | #define RELAX_MIPS16_MARK_EXTENDED(i) ((i) | 0x1000) |
| 1066 | #define RELAX_MIPS16_CLEAR_EXTENDED(i) ((i) &~ 0x1000) |
| 1067 | #define RELAX_MIPS16_LONG_BRANCH(i) (((i) & 0x2000) != 0) |
| 1068 | #define RELAX_MIPS16_MARK_LONG_BRANCH(i) ((i) | 0x2000) |
| 1069 | #define RELAX_MIPS16_CLEAR_LONG_BRANCH(i) ((i) &~ 0x2000) |
| 1070 | |
| 1071 | /* For microMIPS code, we use relaxation similar to one we use for |
| 1072 | MIPS16 code. Some instructions that take immediate values support |
| 1073 | two encodings: a small one which takes some small value, and a |
| 1074 | larger one which takes a 16 bit value. As some branches also follow |
| 1075 | this pattern, relaxing these values is required. |
| 1076 | |
| 1077 | We can assemble both microMIPS and normal MIPS code in a single |
| 1078 | object. Therefore, we need to support this type of relaxation at |
| 1079 | the same time that we support the relaxation described above. We |
| 1080 | use one of the high bits of the subtype field to distinguish these |
| 1081 | cases. |
| 1082 | |
| 1083 | The information we store for this type of relaxation is the argument |
| 1084 | code found in the opcode file for this relocation, the register |
| 1085 | selected as the assembler temporary, whether the branch is |
| 1086 | unconditional, whether it is compact, whether it stores the link |
| 1087 | address implicitly in $ra, whether relaxation of out-of-range 32-bit |
| 1088 | branches to a sequence of instructions is enabled, and whether the |
| 1089 | displacement of a branch is too large to fit as an immediate argument |
| 1090 | of a 16-bit and a 32-bit branch, respectively. */ |
| 1091 | #define RELAX_MICROMIPS_ENCODE(type, at, uncond, compact, link, \ |
| 1092 | relax32, toofar16, toofar32) \ |
| 1093 | (0x40000000 \ |
| 1094 | | ((type) & 0xff) \ |
| 1095 | | (((at) & 0x1f) << 8) \ |
| 1096 | | ((uncond) ? 0x2000 : 0) \ |
| 1097 | | ((compact) ? 0x4000 : 0) \ |
| 1098 | | ((link) ? 0x8000 : 0) \ |
| 1099 | | ((relax32) ? 0x10000 : 0) \ |
| 1100 | | ((toofar16) ? 0x20000 : 0) \ |
| 1101 | | ((toofar32) ? 0x40000 : 0)) |
| 1102 | #define RELAX_MICROMIPS_P(i) (((i) & 0xc0000000) == 0x40000000) |
| 1103 | #define RELAX_MICROMIPS_TYPE(i) ((i) & 0xff) |
| 1104 | #define RELAX_MICROMIPS_AT(i) (((i) >> 8) & 0x1f) |
| 1105 | #define RELAX_MICROMIPS_UNCOND(i) (((i) & 0x2000) != 0) |
| 1106 | #define RELAX_MICROMIPS_COMPACT(i) (((i) & 0x4000) != 0) |
| 1107 | #define RELAX_MICROMIPS_LINK(i) (((i) & 0x8000) != 0) |
| 1108 | #define RELAX_MICROMIPS_RELAX32(i) (((i) & 0x10000) != 0) |
| 1109 | |
| 1110 | #define RELAX_MICROMIPS_TOOFAR16(i) (((i) & 0x20000) != 0) |
| 1111 | #define RELAX_MICROMIPS_MARK_TOOFAR16(i) ((i) | 0x20000) |
| 1112 | #define RELAX_MICROMIPS_CLEAR_TOOFAR16(i) ((i) & ~0x20000) |
| 1113 | #define RELAX_MICROMIPS_TOOFAR32(i) (((i) & 0x40000) != 0) |
| 1114 | #define RELAX_MICROMIPS_MARK_TOOFAR32(i) ((i) | 0x40000) |
| 1115 | #define RELAX_MICROMIPS_CLEAR_TOOFAR32(i) ((i) & ~0x40000) |
| 1116 | |
| 1117 | /* Sign-extend 16-bit value X. */ |
| 1118 | #define SEXT_16BIT(X) ((((X) + 0x8000) & 0xffff) - 0x8000) |
| 1119 | |
| 1120 | /* Is the given value a sign-extended 32-bit value? */ |
| 1121 | #define IS_SEXT_32BIT_NUM(x) \ |
| 1122 | (((x) &~ (offsetT) 0x7fffffff) == 0 \ |
| 1123 | || (((x) &~ (offsetT) 0x7fffffff) == ~ (offsetT) 0x7fffffff)) |
| 1124 | |
| 1125 | /* Is the given value a sign-extended 16-bit value? */ |
| 1126 | #define IS_SEXT_16BIT_NUM(x) \ |
| 1127 | (((x) &~ (offsetT) 0x7fff) == 0 \ |
| 1128 | || (((x) &~ (offsetT) 0x7fff) == ~ (offsetT) 0x7fff)) |
| 1129 | |
| 1130 | /* Is the given value a sign-extended 12-bit value? */ |
| 1131 | #define IS_SEXT_12BIT_NUM(x) \ |
| 1132 | (((((x) & 0xfff) ^ 0x800LL) - 0x800LL) == (x)) |
| 1133 | |
| 1134 | /* Is the given value a sign-extended 9-bit value? */ |
| 1135 | #define IS_SEXT_9BIT_NUM(x) \ |
| 1136 | (((((x) & 0x1ff) ^ 0x100LL) - 0x100LL) == (x)) |
| 1137 | |
| 1138 | /* Is the given value a zero-extended 32-bit value? Or a negated one? */ |
| 1139 | #define IS_ZEXT_32BIT_NUM(x) \ |
| 1140 | (((x) &~ (offsetT) 0xffffffff) == 0 \ |
| 1141 | || (((x) &~ (offsetT) 0xffffffff) == ~ (offsetT) 0xffffffff)) |
| 1142 | |
| 1143 | /* Extract bits MASK << SHIFT from STRUCT and shift them right |
| 1144 | SHIFT places. */ |
| 1145 | #define EXTRACT_BITS(STRUCT, MASK, SHIFT) \ |
| 1146 | (((STRUCT) >> (SHIFT)) & (MASK)) |
| 1147 | |
| 1148 | /* Extract the operand given by FIELD from mips_cl_insn INSN. */ |
| 1149 | #define EXTRACT_OPERAND(MICROMIPS, FIELD, INSN) \ |
| 1150 | (!(MICROMIPS) \ |
| 1151 | ? EXTRACT_BITS ((INSN).insn_opcode, OP_MASK_##FIELD, OP_SH_##FIELD) \ |
| 1152 | : EXTRACT_BITS ((INSN).insn_opcode, \ |
| 1153 | MICROMIPSOP_MASK_##FIELD, MICROMIPSOP_SH_##FIELD)) |
| 1154 | #define MIPS16_EXTRACT_OPERAND(FIELD, INSN) \ |
| 1155 | EXTRACT_BITS ((INSN).insn_opcode, \ |
| 1156 | MIPS16OP_MASK_##FIELD, \ |
| 1157 | MIPS16OP_SH_##FIELD) |
| 1158 | |
| 1159 | /* The MIPS16 EXTEND opcode, shifted left 16 places. */ |
| 1160 | #define MIPS16_EXTEND (0xf000U << 16) |
| 1161 | \f |
| 1162 | /* Whether or not we are emitting a branch-likely macro. */ |
| 1163 | static bfd_boolean emit_branch_likely_macro = FALSE; |
| 1164 | |
| 1165 | /* Global variables used when generating relaxable macros. See the |
| 1166 | comment above RELAX_ENCODE for more details about how relaxation |
| 1167 | is used. */ |
| 1168 | static struct { |
| 1169 | /* 0 if we're not emitting a relaxable macro. |
| 1170 | 1 if we're emitting the first of the two relaxation alternatives. |
| 1171 | 2 if we're emitting the second alternative. */ |
| 1172 | int sequence; |
| 1173 | |
| 1174 | /* The first relaxable fixup in the current frag. (In other words, |
| 1175 | the first fixup that refers to relaxable code.) */ |
| 1176 | fixS *first_fixup; |
| 1177 | |
| 1178 | /* sizes[0] says how many bytes of the first alternative are stored in |
| 1179 | the current frag. Likewise sizes[1] for the second alternative. */ |
| 1180 | unsigned int sizes[2]; |
| 1181 | |
| 1182 | /* The symbol on which the choice of sequence depends. */ |
| 1183 | symbolS *symbol; |
| 1184 | } mips_relax; |
| 1185 | \f |
| 1186 | /* Global variables used to decide whether a macro needs a warning. */ |
| 1187 | static struct { |
| 1188 | /* True if the macro is in a branch delay slot. */ |
| 1189 | bfd_boolean delay_slot_p; |
| 1190 | |
| 1191 | /* Set to the length in bytes required if the macro is in a delay slot |
| 1192 | that requires a specific length of instruction, otherwise zero. */ |
| 1193 | unsigned int delay_slot_length; |
| 1194 | |
| 1195 | /* For relaxable macros, sizes[0] is the length of the first alternative |
| 1196 | in bytes and sizes[1] is the length of the second alternative. |
| 1197 | For non-relaxable macros, both elements give the length of the |
| 1198 | macro in bytes. */ |
| 1199 | unsigned int sizes[2]; |
| 1200 | |
| 1201 | /* For relaxable macros, first_insn_sizes[0] is the length of the first |
| 1202 | instruction of the first alternative in bytes and first_insn_sizes[1] |
| 1203 | is the length of the first instruction of the second alternative. |
| 1204 | For non-relaxable macros, both elements give the length of the first |
| 1205 | instruction in bytes. |
| 1206 | |
| 1207 | Set to zero if we haven't yet seen the first instruction. */ |
| 1208 | unsigned int first_insn_sizes[2]; |
| 1209 | |
| 1210 | /* For relaxable macros, insns[0] is the number of instructions for the |
| 1211 | first alternative and insns[1] is the number of instructions for the |
| 1212 | second alternative. |
| 1213 | |
| 1214 | For non-relaxable macros, both elements give the number of |
| 1215 | instructions for the macro. */ |
| 1216 | unsigned int insns[2]; |
| 1217 | |
| 1218 | /* The first variant frag for this macro. */ |
| 1219 | fragS *first_frag; |
| 1220 | } mips_macro_warning; |
| 1221 | \f |
| 1222 | /* Prototypes for static functions. */ |
| 1223 | |
| 1224 | enum mips_regclass { MIPS_GR_REG, MIPS_FP_REG, MIPS16_REG }; |
| 1225 | |
| 1226 | static void append_insn |
| 1227 | (struct mips_cl_insn *, expressionS *, bfd_reloc_code_real_type *, |
| 1228 | bfd_boolean expansionp); |
| 1229 | static void mips_no_prev_insn (void); |
| 1230 | static void macro_build (expressionS *, const char *, const char *, ...); |
| 1231 | static void mips16_macro_build |
| 1232 | (expressionS *, const char *, const char *, va_list *); |
| 1233 | static void load_register (int, expressionS *, int); |
| 1234 | static void macro_start (void); |
| 1235 | static void macro_end (void); |
| 1236 | static void macro (struct mips_cl_insn *ip, char *str); |
| 1237 | static void mips16_macro (struct mips_cl_insn * ip); |
| 1238 | static void mips_ip (char *str, struct mips_cl_insn * ip); |
| 1239 | static void mips16_ip (char *str, struct mips_cl_insn * ip); |
| 1240 | static void mips16_immed |
| 1241 | (char *, unsigned int, int, bfd_reloc_code_real_type, offsetT, |
| 1242 | unsigned int, unsigned long *); |
| 1243 | static size_t my_getSmallExpression |
| 1244 | (expressionS *, bfd_reloc_code_real_type *, char *); |
| 1245 | static void my_getExpression (expressionS *, char *); |
| 1246 | static void s_align (int); |
| 1247 | static void s_change_sec (int); |
| 1248 | static void s_change_section (int); |
| 1249 | static void s_cons (int); |
| 1250 | static void s_float_cons (int); |
| 1251 | static void s_mips_globl (int); |
| 1252 | static void s_option (int); |
| 1253 | static void s_mipsset (int); |
| 1254 | static void s_abicalls (int); |
| 1255 | static void s_cpload (int); |
| 1256 | static void s_cpsetup (int); |
| 1257 | static void s_cplocal (int); |
| 1258 | static void s_cprestore (int); |
| 1259 | static void s_cpreturn (int); |
| 1260 | static void s_dtprelword (int); |
| 1261 | static void s_dtpreldword (int); |
| 1262 | static void s_tprelword (int); |
| 1263 | static void s_tpreldword (int); |
| 1264 | static void s_gpvalue (int); |
| 1265 | static void s_gpword (int); |
| 1266 | static void s_gpdword (int); |
| 1267 | static void s_ehword (int); |
| 1268 | static void s_cpadd (int); |
| 1269 | static void s_insn (int); |
| 1270 | static void s_nan (int); |
| 1271 | static void md_obj_begin (void); |
| 1272 | static void md_obj_end (void); |
| 1273 | static void s_mips_ent (int); |
| 1274 | static void s_mips_end (int); |
| 1275 | static void s_mips_frame (int); |
| 1276 | static void s_mips_mask (int reg_type); |
| 1277 | static void s_mips_stab (int); |
| 1278 | static void s_mips_weakext (int); |
| 1279 | static void s_mips_file (int); |
| 1280 | static void s_mips_loc (int); |
| 1281 | static bfd_boolean pic_need_relax (symbolS *, asection *); |
| 1282 | static int relaxed_branch_length (fragS *, asection *, int); |
| 1283 | static int relaxed_micromips_16bit_branch_length (fragS *, asection *, int); |
| 1284 | static int relaxed_micromips_32bit_branch_length (fragS *, asection *, int); |
| 1285 | |
| 1286 | /* Table and functions used to map between CPU/ISA names, and |
| 1287 | ISA levels, and CPU numbers. */ |
| 1288 | |
| 1289 | struct mips_cpu_info |
| 1290 | { |
| 1291 | const char *name; /* CPU or ISA name. */ |
| 1292 | int flags; /* MIPS_CPU_* flags. */ |
| 1293 | int ase; /* Set of ASEs implemented by the CPU. */ |
| 1294 | int isa; /* ISA level. */ |
| 1295 | int cpu; /* CPU number (default CPU if ISA). */ |
| 1296 | }; |
| 1297 | |
| 1298 | #define MIPS_CPU_IS_ISA 0x0001 /* Is this an ISA? (If 0, a CPU.) */ |
| 1299 | |
| 1300 | static const struct mips_cpu_info *mips_parse_cpu (const char *, const char *); |
| 1301 | static const struct mips_cpu_info *mips_cpu_info_from_isa (int); |
| 1302 | static const struct mips_cpu_info *mips_cpu_info_from_arch (int); |
| 1303 | \f |
| 1304 | /* Command-line options. */ |
| 1305 | const char *md_shortopts = "O::g::G:"; |
| 1306 | |
| 1307 | enum options |
| 1308 | { |
| 1309 | OPTION_MARCH = OPTION_MD_BASE, |
| 1310 | OPTION_MTUNE, |
| 1311 | OPTION_MIPS1, |
| 1312 | OPTION_MIPS2, |
| 1313 | OPTION_MIPS3, |
| 1314 | OPTION_MIPS4, |
| 1315 | OPTION_MIPS5, |
| 1316 | OPTION_MIPS32, |
| 1317 | OPTION_MIPS64, |
| 1318 | OPTION_MIPS32R2, |
| 1319 | OPTION_MIPS64R2, |
| 1320 | OPTION_MIPS16, |
| 1321 | OPTION_NO_MIPS16, |
| 1322 | OPTION_MIPS3D, |
| 1323 | OPTION_NO_MIPS3D, |
| 1324 | OPTION_MDMX, |
| 1325 | OPTION_NO_MDMX, |
| 1326 | OPTION_DSP, |
| 1327 | OPTION_NO_DSP, |
| 1328 | OPTION_MT, |
| 1329 | OPTION_NO_MT, |
| 1330 | OPTION_VIRT, |
| 1331 | OPTION_NO_VIRT, |
| 1332 | OPTION_SMARTMIPS, |
| 1333 | OPTION_NO_SMARTMIPS, |
| 1334 | OPTION_DSPR2, |
| 1335 | OPTION_NO_DSPR2, |
| 1336 | OPTION_EVA, |
| 1337 | OPTION_NO_EVA, |
| 1338 | OPTION_MICROMIPS, |
| 1339 | OPTION_NO_MICROMIPS, |
| 1340 | OPTION_MCU, |
| 1341 | OPTION_NO_MCU, |
| 1342 | OPTION_COMPAT_ARCH_BASE, |
| 1343 | OPTION_M4650, |
| 1344 | OPTION_NO_M4650, |
| 1345 | OPTION_M4010, |
| 1346 | OPTION_NO_M4010, |
| 1347 | OPTION_M4100, |
| 1348 | OPTION_NO_M4100, |
| 1349 | OPTION_M3900, |
| 1350 | OPTION_NO_M3900, |
| 1351 | OPTION_M7000_HILO_FIX, |
| 1352 | OPTION_MNO_7000_HILO_FIX, |
| 1353 | OPTION_FIX_24K, |
| 1354 | OPTION_NO_FIX_24K, |
| 1355 | OPTION_FIX_LOONGSON2F_JUMP, |
| 1356 | OPTION_NO_FIX_LOONGSON2F_JUMP, |
| 1357 | OPTION_FIX_LOONGSON2F_NOP, |
| 1358 | OPTION_NO_FIX_LOONGSON2F_NOP, |
| 1359 | OPTION_FIX_VR4120, |
| 1360 | OPTION_NO_FIX_VR4120, |
| 1361 | OPTION_FIX_VR4130, |
| 1362 | OPTION_NO_FIX_VR4130, |
| 1363 | OPTION_FIX_CN63XXP1, |
| 1364 | OPTION_NO_FIX_CN63XXP1, |
| 1365 | OPTION_TRAP, |
| 1366 | OPTION_BREAK, |
| 1367 | OPTION_EB, |
| 1368 | OPTION_EL, |
| 1369 | OPTION_FP32, |
| 1370 | OPTION_GP32, |
| 1371 | OPTION_CONSTRUCT_FLOATS, |
| 1372 | OPTION_NO_CONSTRUCT_FLOATS, |
| 1373 | OPTION_FP64, |
| 1374 | OPTION_GP64, |
| 1375 | OPTION_RELAX_BRANCH, |
| 1376 | OPTION_NO_RELAX_BRANCH, |
| 1377 | OPTION_INSN32, |
| 1378 | OPTION_NO_INSN32, |
| 1379 | OPTION_MSHARED, |
| 1380 | OPTION_MNO_SHARED, |
| 1381 | OPTION_MSYM32, |
| 1382 | OPTION_MNO_SYM32, |
| 1383 | OPTION_SOFT_FLOAT, |
| 1384 | OPTION_HARD_FLOAT, |
| 1385 | OPTION_SINGLE_FLOAT, |
| 1386 | OPTION_DOUBLE_FLOAT, |
| 1387 | OPTION_32, |
| 1388 | OPTION_CALL_SHARED, |
| 1389 | OPTION_CALL_NONPIC, |
| 1390 | OPTION_NON_SHARED, |
| 1391 | OPTION_XGOT, |
| 1392 | OPTION_MABI, |
| 1393 | OPTION_N32, |
| 1394 | OPTION_64, |
| 1395 | OPTION_MDEBUG, |
| 1396 | OPTION_NO_MDEBUG, |
| 1397 | OPTION_PDR, |
| 1398 | OPTION_NO_PDR, |
| 1399 | OPTION_MVXWORKS_PIC, |
| 1400 | OPTION_NAN, |
| 1401 | OPTION_END_OF_ENUM |
| 1402 | }; |
| 1403 | |
| 1404 | struct option md_longopts[] = |
| 1405 | { |
| 1406 | /* Options which specify architecture. */ |
| 1407 | {"march", required_argument, NULL, OPTION_MARCH}, |
| 1408 | {"mtune", required_argument, NULL, OPTION_MTUNE}, |
| 1409 | {"mips0", no_argument, NULL, OPTION_MIPS1}, |
| 1410 | {"mips1", no_argument, NULL, OPTION_MIPS1}, |
| 1411 | {"mips2", no_argument, NULL, OPTION_MIPS2}, |
| 1412 | {"mips3", no_argument, NULL, OPTION_MIPS3}, |
| 1413 | {"mips4", no_argument, NULL, OPTION_MIPS4}, |
| 1414 | {"mips5", no_argument, NULL, OPTION_MIPS5}, |
| 1415 | {"mips32", no_argument, NULL, OPTION_MIPS32}, |
| 1416 | {"mips64", no_argument, NULL, OPTION_MIPS64}, |
| 1417 | {"mips32r2", no_argument, NULL, OPTION_MIPS32R2}, |
| 1418 | {"mips64r2", no_argument, NULL, OPTION_MIPS64R2}, |
| 1419 | |
| 1420 | /* Options which specify Application Specific Extensions (ASEs). */ |
| 1421 | {"mips16", no_argument, NULL, OPTION_MIPS16}, |
| 1422 | {"no-mips16", no_argument, NULL, OPTION_NO_MIPS16}, |
| 1423 | {"mips3d", no_argument, NULL, OPTION_MIPS3D}, |
| 1424 | {"no-mips3d", no_argument, NULL, OPTION_NO_MIPS3D}, |
| 1425 | {"mdmx", no_argument, NULL, OPTION_MDMX}, |
| 1426 | {"no-mdmx", no_argument, NULL, OPTION_NO_MDMX}, |
| 1427 | {"mdsp", no_argument, NULL, OPTION_DSP}, |
| 1428 | {"mno-dsp", no_argument, NULL, OPTION_NO_DSP}, |
| 1429 | {"mmt", no_argument, NULL, OPTION_MT}, |
| 1430 | {"mno-mt", no_argument, NULL, OPTION_NO_MT}, |
| 1431 | {"msmartmips", no_argument, NULL, OPTION_SMARTMIPS}, |
| 1432 | {"mno-smartmips", no_argument, NULL, OPTION_NO_SMARTMIPS}, |
| 1433 | {"mdspr2", no_argument, NULL, OPTION_DSPR2}, |
| 1434 | {"mno-dspr2", no_argument, NULL, OPTION_NO_DSPR2}, |
| 1435 | {"meva", no_argument, NULL, OPTION_EVA}, |
| 1436 | {"mno-eva", no_argument, NULL, OPTION_NO_EVA}, |
| 1437 | {"mmicromips", no_argument, NULL, OPTION_MICROMIPS}, |
| 1438 | {"mno-micromips", no_argument, NULL, OPTION_NO_MICROMIPS}, |
| 1439 | {"mmcu", no_argument, NULL, OPTION_MCU}, |
| 1440 | {"mno-mcu", no_argument, NULL, OPTION_NO_MCU}, |
| 1441 | {"mvirt", no_argument, NULL, OPTION_VIRT}, |
| 1442 | {"mno-virt", no_argument, NULL, OPTION_NO_VIRT}, |
| 1443 | |
| 1444 | /* Old-style architecture options. Don't add more of these. */ |
| 1445 | {"m4650", no_argument, NULL, OPTION_M4650}, |
| 1446 | {"no-m4650", no_argument, NULL, OPTION_NO_M4650}, |
| 1447 | {"m4010", no_argument, NULL, OPTION_M4010}, |
| 1448 | {"no-m4010", no_argument, NULL, OPTION_NO_M4010}, |
| 1449 | {"m4100", no_argument, NULL, OPTION_M4100}, |
| 1450 | {"no-m4100", no_argument, NULL, OPTION_NO_M4100}, |
| 1451 | {"m3900", no_argument, NULL, OPTION_M3900}, |
| 1452 | {"no-m3900", no_argument, NULL, OPTION_NO_M3900}, |
| 1453 | |
| 1454 | /* Options which enable bug fixes. */ |
| 1455 | {"mfix7000", no_argument, NULL, OPTION_M7000_HILO_FIX}, |
| 1456 | {"no-fix-7000", no_argument, NULL, OPTION_MNO_7000_HILO_FIX}, |
| 1457 | {"mno-fix7000", no_argument, NULL, OPTION_MNO_7000_HILO_FIX}, |
| 1458 | {"mfix-loongson2f-jump", no_argument, NULL, OPTION_FIX_LOONGSON2F_JUMP}, |
| 1459 | {"mno-fix-loongson2f-jump", no_argument, NULL, OPTION_NO_FIX_LOONGSON2F_JUMP}, |
| 1460 | {"mfix-loongson2f-nop", no_argument, NULL, OPTION_FIX_LOONGSON2F_NOP}, |
| 1461 | {"mno-fix-loongson2f-nop", no_argument, NULL, OPTION_NO_FIX_LOONGSON2F_NOP}, |
| 1462 | {"mfix-vr4120", no_argument, NULL, OPTION_FIX_VR4120}, |
| 1463 | {"mno-fix-vr4120", no_argument, NULL, OPTION_NO_FIX_VR4120}, |
| 1464 | {"mfix-vr4130", no_argument, NULL, OPTION_FIX_VR4130}, |
| 1465 | {"mno-fix-vr4130", no_argument, NULL, OPTION_NO_FIX_VR4130}, |
| 1466 | {"mfix-24k", no_argument, NULL, OPTION_FIX_24K}, |
| 1467 | {"mno-fix-24k", no_argument, NULL, OPTION_NO_FIX_24K}, |
| 1468 | {"mfix-cn63xxp1", no_argument, NULL, OPTION_FIX_CN63XXP1}, |
| 1469 | {"mno-fix-cn63xxp1", no_argument, NULL, OPTION_NO_FIX_CN63XXP1}, |
| 1470 | |
| 1471 | /* Miscellaneous options. */ |
| 1472 | {"trap", no_argument, NULL, OPTION_TRAP}, |
| 1473 | {"no-break", no_argument, NULL, OPTION_TRAP}, |
| 1474 | {"break", no_argument, NULL, OPTION_BREAK}, |
| 1475 | {"no-trap", no_argument, NULL, OPTION_BREAK}, |
| 1476 | {"EB", no_argument, NULL, OPTION_EB}, |
| 1477 | {"EL", no_argument, NULL, OPTION_EL}, |
| 1478 | {"mfp32", no_argument, NULL, OPTION_FP32}, |
| 1479 | {"mgp32", no_argument, NULL, OPTION_GP32}, |
| 1480 | {"construct-floats", no_argument, NULL, OPTION_CONSTRUCT_FLOATS}, |
| 1481 | {"no-construct-floats", no_argument, NULL, OPTION_NO_CONSTRUCT_FLOATS}, |
| 1482 | {"mfp64", no_argument, NULL, OPTION_FP64}, |
| 1483 | {"mgp64", no_argument, NULL, OPTION_GP64}, |
| 1484 | {"relax-branch", no_argument, NULL, OPTION_RELAX_BRANCH}, |
| 1485 | {"no-relax-branch", no_argument, NULL, OPTION_NO_RELAX_BRANCH}, |
| 1486 | {"minsn32", no_argument, NULL, OPTION_INSN32}, |
| 1487 | {"mno-insn32", no_argument, NULL, OPTION_NO_INSN32}, |
| 1488 | {"mshared", no_argument, NULL, OPTION_MSHARED}, |
| 1489 | {"mno-shared", no_argument, NULL, OPTION_MNO_SHARED}, |
| 1490 | {"msym32", no_argument, NULL, OPTION_MSYM32}, |
| 1491 | {"mno-sym32", no_argument, NULL, OPTION_MNO_SYM32}, |
| 1492 | {"msoft-float", no_argument, NULL, OPTION_SOFT_FLOAT}, |
| 1493 | {"mhard-float", no_argument, NULL, OPTION_HARD_FLOAT}, |
| 1494 | {"msingle-float", no_argument, NULL, OPTION_SINGLE_FLOAT}, |
| 1495 | {"mdouble-float", no_argument, NULL, OPTION_DOUBLE_FLOAT}, |
| 1496 | |
| 1497 | /* Strictly speaking this next option is ELF specific, |
| 1498 | but we allow it for other ports as well in order to |
| 1499 | make testing easier. */ |
| 1500 | {"32", no_argument, NULL, OPTION_32}, |
| 1501 | |
| 1502 | /* ELF-specific options. */ |
| 1503 | {"KPIC", no_argument, NULL, OPTION_CALL_SHARED}, |
| 1504 | {"call_shared", no_argument, NULL, OPTION_CALL_SHARED}, |
| 1505 | {"call_nonpic", no_argument, NULL, OPTION_CALL_NONPIC}, |
| 1506 | {"non_shared", no_argument, NULL, OPTION_NON_SHARED}, |
| 1507 | {"xgot", no_argument, NULL, OPTION_XGOT}, |
| 1508 | {"mabi", required_argument, NULL, OPTION_MABI}, |
| 1509 | {"n32", no_argument, NULL, OPTION_N32}, |
| 1510 | {"64", no_argument, NULL, OPTION_64}, |
| 1511 | {"mdebug", no_argument, NULL, OPTION_MDEBUG}, |
| 1512 | {"no-mdebug", no_argument, NULL, OPTION_NO_MDEBUG}, |
| 1513 | {"mpdr", no_argument, NULL, OPTION_PDR}, |
| 1514 | {"mno-pdr", no_argument, NULL, OPTION_NO_PDR}, |
| 1515 | {"mvxworks-pic", no_argument, NULL, OPTION_MVXWORKS_PIC}, |
| 1516 | {"mnan", required_argument, NULL, OPTION_NAN}, |
| 1517 | |
| 1518 | {NULL, no_argument, NULL, 0} |
| 1519 | }; |
| 1520 | size_t md_longopts_size = sizeof (md_longopts); |
| 1521 | \f |
| 1522 | /* Information about either an Application Specific Extension or an |
| 1523 | optional architecture feature that, for simplicity, we treat in the |
| 1524 | same way as an ASE. */ |
| 1525 | struct mips_ase |
| 1526 | { |
| 1527 | /* The name of the ASE, used in both the command-line and .set options. */ |
| 1528 | const char *name; |
| 1529 | |
| 1530 | /* The associated ASE_* flags. If the ASE is available on both 32-bit |
| 1531 | and 64-bit architectures, the flags here refer to the subset that |
| 1532 | is available on both. */ |
| 1533 | unsigned int flags; |
| 1534 | |
| 1535 | /* The ASE_* flag used for instructions that are available on 64-bit |
| 1536 | architectures but that are not included in FLAGS. */ |
| 1537 | unsigned int flags64; |
| 1538 | |
| 1539 | /* The command-line options that turn the ASE on and off. */ |
| 1540 | int option_on; |
| 1541 | int option_off; |
| 1542 | |
| 1543 | /* The minimum required architecture revisions for MIPS32, MIPS64, |
| 1544 | microMIPS32 and microMIPS64, or -1 if the extension isn't supported. */ |
| 1545 | int mips32_rev; |
| 1546 | int mips64_rev; |
| 1547 | int micromips32_rev; |
| 1548 | int micromips64_rev; |
| 1549 | }; |
| 1550 | |
| 1551 | /* A table of all supported ASEs. */ |
| 1552 | static const struct mips_ase mips_ases[] = { |
| 1553 | { "dsp", ASE_DSP, ASE_DSP64, |
| 1554 | OPTION_DSP, OPTION_NO_DSP, |
| 1555 | 2, 2, 2, 2 }, |
| 1556 | |
| 1557 | { "dspr2", ASE_DSP | ASE_DSPR2, 0, |
| 1558 | OPTION_DSPR2, OPTION_NO_DSPR2, |
| 1559 | 2, 2, 2, 2 }, |
| 1560 | |
| 1561 | { "eva", ASE_EVA, 0, |
| 1562 | OPTION_EVA, OPTION_NO_EVA, |
| 1563 | 2, 2, 2, 2 }, |
| 1564 | |
| 1565 | { "mcu", ASE_MCU, 0, |
| 1566 | OPTION_MCU, OPTION_NO_MCU, |
| 1567 | 2, 2, 2, 2 }, |
| 1568 | |
| 1569 | /* Deprecated in MIPS64r5, but we don't implement that yet. */ |
| 1570 | { "mdmx", ASE_MDMX, 0, |
| 1571 | OPTION_MDMX, OPTION_NO_MDMX, |
| 1572 | -1, 1, -1, -1 }, |
| 1573 | |
| 1574 | /* Requires 64-bit FPRs, so the minimum MIPS32 revision is 2. */ |
| 1575 | { "mips3d", ASE_MIPS3D, 0, |
| 1576 | OPTION_MIPS3D, OPTION_NO_MIPS3D, |
| 1577 | 2, 1, -1, -1 }, |
| 1578 | |
| 1579 | { "mt", ASE_MT, 0, |
| 1580 | OPTION_MT, OPTION_NO_MT, |
| 1581 | 2, 2, -1, -1 }, |
| 1582 | |
| 1583 | { "smartmips", ASE_SMARTMIPS, 0, |
| 1584 | OPTION_SMARTMIPS, OPTION_NO_SMARTMIPS, |
| 1585 | 1, -1, -1, -1 }, |
| 1586 | |
| 1587 | { "virt", ASE_VIRT, ASE_VIRT64, |
| 1588 | OPTION_VIRT, OPTION_NO_VIRT, |
| 1589 | 2, 2, 2, 2 } |
| 1590 | }; |
| 1591 | |
| 1592 | /* The set of ASEs that require -mfp64. */ |
| 1593 | #define FP64_ASES (ASE_MIPS3D | ASE_MDMX) |
| 1594 | |
| 1595 | /* Groups of ASE_* flags that represent different revisions of an ASE. */ |
| 1596 | static const unsigned int mips_ase_groups[] = { |
| 1597 | ASE_DSP | ASE_DSPR2 |
| 1598 | }; |
| 1599 | \f |
| 1600 | /* Pseudo-op table. |
| 1601 | |
| 1602 | The following pseudo-ops from the Kane and Heinrich MIPS book |
| 1603 | should be defined here, but are currently unsupported: .alias, |
| 1604 | .galive, .gjaldef, .gjrlive, .livereg, .noalias. |
| 1605 | |
| 1606 | The following pseudo-ops from the Kane and Heinrich MIPS book are |
| 1607 | specific to the type of debugging information being generated, and |
| 1608 | should be defined by the object format: .aent, .begin, .bend, |
| 1609 | .bgnb, .end, .endb, .ent, .fmask, .frame, .loc, .mask, .verstamp, |
| 1610 | .vreg. |
| 1611 | |
| 1612 | The following pseudo-ops from the Kane and Heinrich MIPS book are |
| 1613 | not MIPS CPU specific, but are also not specific to the object file |
| 1614 | format. This file is probably the best place to define them, but |
| 1615 | they are not currently supported: .asm0, .endr, .lab, .struct. */ |
| 1616 | |
| 1617 | static const pseudo_typeS mips_pseudo_table[] = |
| 1618 | { |
| 1619 | /* MIPS specific pseudo-ops. */ |
| 1620 | {"option", s_option, 0}, |
| 1621 | {"set", s_mipsset, 0}, |
| 1622 | {"rdata", s_change_sec, 'r'}, |
| 1623 | {"sdata", s_change_sec, 's'}, |
| 1624 | {"livereg", s_ignore, 0}, |
| 1625 | {"abicalls", s_abicalls, 0}, |
| 1626 | {"cpload", s_cpload, 0}, |
| 1627 | {"cpsetup", s_cpsetup, 0}, |
| 1628 | {"cplocal", s_cplocal, 0}, |
| 1629 | {"cprestore", s_cprestore, 0}, |
| 1630 | {"cpreturn", s_cpreturn, 0}, |
| 1631 | {"dtprelword", s_dtprelword, 0}, |
| 1632 | {"dtpreldword", s_dtpreldword, 0}, |
| 1633 | {"tprelword", s_tprelword, 0}, |
| 1634 | {"tpreldword", s_tpreldword, 0}, |
| 1635 | {"gpvalue", s_gpvalue, 0}, |
| 1636 | {"gpword", s_gpword, 0}, |
| 1637 | {"gpdword", s_gpdword, 0}, |
| 1638 | {"ehword", s_ehword, 0}, |
| 1639 | {"cpadd", s_cpadd, 0}, |
| 1640 | {"insn", s_insn, 0}, |
| 1641 | {"nan", s_nan, 0}, |
| 1642 | |
| 1643 | /* Relatively generic pseudo-ops that happen to be used on MIPS |
| 1644 | chips. */ |
| 1645 | {"asciiz", stringer, 8 + 1}, |
| 1646 | {"bss", s_change_sec, 'b'}, |
| 1647 | {"err", s_err, 0}, |
| 1648 | {"half", s_cons, 1}, |
| 1649 | {"dword", s_cons, 3}, |
| 1650 | {"weakext", s_mips_weakext, 0}, |
| 1651 | {"origin", s_org, 0}, |
| 1652 | {"repeat", s_rept, 0}, |
| 1653 | |
| 1654 | /* For MIPS this is non-standard, but we define it for consistency. */ |
| 1655 | {"sbss", s_change_sec, 'B'}, |
| 1656 | |
| 1657 | /* These pseudo-ops are defined in read.c, but must be overridden |
| 1658 | here for one reason or another. */ |
| 1659 | {"align", s_align, 0}, |
| 1660 | {"byte", s_cons, 0}, |
| 1661 | {"data", s_change_sec, 'd'}, |
| 1662 | {"double", s_float_cons, 'd'}, |
| 1663 | {"float", s_float_cons, 'f'}, |
| 1664 | {"globl", s_mips_globl, 0}, |
| 1665 | {"global", s_mips_globl, 0}, |
| 1666 | {"hword", s_cons, 1}, |
| 1667 | {"int", s_cons, 2}, |
| 1668 | {"long", s_cons, 2}, |
| 1669 | {"octa", s_cons, 4}, |
| 1670 | {"quad", s_cons, 3}, |
| 1671 | {"section", s_change_section, 0}, |
| 1672 | {"short", s_cons, 1}, |
| 1673 | {"single", s_float_cons, 'f'}, |
| 1674 | {"stabd", s_mips_stab, 'd'}, |
| 1675 | {"stabn", s_mips_stab, 'n'}, |
| 1676 | {"stabs", s_mips_stab, 's'}, |
| 1677 | {"text", s_change_sec, 't'}, |
| 1678 | {"word", s_cons, 2}, |
| 1679 | |
| 1680 | { "extern", ecoff_directive_extern, 0}, |
| 1681 | |
| 1682 | { NULL, NULL, 0 }, |
| 1683 | }; |
| 1684 | |
| 1685 | static const pseudo_typeS mips_nonecoff_pseudo_table[] = |
| 1686 | { |
| 1687 | /* These pseudo-ops should be defined by the object file format. |
| 1688 | However, a.out doesn't support them, so we have versions here. */ |
| 1689 | {"aent", s_mips_ent, 1}, |
| 1690 | {"bgnb", s_ignore, 0}, |
| 1691 | {"end", s_mips_end, 0}, |
| 1692 | {"endb", s_ignore, 0}, |
| 1693 | {"ent", s_mips_ent, 0}, |
| 1694 | {"file", s_mips_file, 0}, |
| 1695 | {"fmask", s_mips_mask, 'F'}, |
| 1696 | {"frame", s_mips_frame, 0}, |
| 1697 | {"loc", s_mips_loc, 0}, |
| 1698 | {"mask", s_mips_mask, 'R'}, |
| 1699 | {"verstamp", s_ignore, 0}, |
| 1700 | { NULL, NULL, 0 }, |
| 1701 | }; |
| 1702 | |
| 1703 | /* Export the ABI address size for use by TC_ADDRESS_BYTES for the |
| 1704 | purpose of the `.dc.a' internal pseudo-op. */ |
| 1705 | |
| 1706 | int |
| 1707 | mips_address_bytes (void) |
| 1708 | { |
| 1709 | return HAVE_64BIT_ADDRESSES ? 8 : 4; |
| 1710 | } |
| 1711 | |
| 1712 | extern void pop_insert (const pseudo_typeS *); |
| 1713 | |
| 1714 | void |
| 1715 | mips_pop_insert (void) |
| 1716 | { |
| 1717 | pop_insert (mips_pseudo_table); |
| 1718 | if (! ECOFF_DEBUGGING) |
| 1719 | pop_insert (mips_nonecoff_pseudo_table); |
| 1720 | } |
| 1721 | \f |
| 1722 | /* Symbols labelling the current insn. */ |
| 1723 | |
| 1724 | struct insn_label_list |
| 1725 | { |
| 1726 | struct insn_label_list *next; |
| 1727 | symbolS *label; |
| 1728 | }; |
| 1729 | |
| 1730 | static struct insn_label_list *free_insn_labels; |
| 1731 | #define label_list tc_segment_info_data.labels |
| 1732 | |
| 1733 | static void mips_clear_insn_labels (void); |
| 1734 | static void mips_mark_labels (void); |
| 1735 | static void mips_compressed_mark_labels (void); |
| 1736 | |
| 1737 | static inline void |
| 1738 | mips_clear_insn_labels (void) |
| 1739 | { |
| 1740 | register struct insn_label_list **pl; |
| 1741 | segment_info_type *si; |
| 1742 | |
| 1743 | if (now_seg) |
| 1744 | { |
| 1745 | for (pl = &free_insn_labels; *pl != NULL; pl = &(*pl)->next) |
| 1746 | ; |
| 1747 | |
| 1748 | si = seg_info (now_seg); |
| 1749 | *pl = si->label_list; |
| 1750 | si->label_list = NULL; |
| 1751 | } |
| 1752 | } |
| 1753 | |
| 1754 | /* Mark instruction labels in MIPS16/microMIPS mode. */ |
| 1755 | |
| 1756 | static inline void |
| 1757 | mips_mark_labels (void) |
| 1758 | { |
| 1759 | if (HAVE_CODE_COMPRESSION) |
| 1760 | mips_compressed_mark_labels (); |
| 1761 | } |
| 1762 | \f |
| 1763 | static char *expr_end; |
| 1764 | |
| 1765 | /* An expression in a macro instruction. This is set by mips_ip and |
| 1766 | mips16_ip and when populated is always an O_constant. */ |
| 1767 | |
| 1768 | static expressionS imm_expr; |
| 1769 | |
| 1770 | /* The relocatable field in an instruction and the relocs associated |
| 1771 | with it. These variables are used for instructions like LUI and |
| 1772 | JAL as well as true offsets. They are also used for address |
| 1773 | operands in macros. */ |
| 1774 | |
| 1775 | static expressionS offset_expr; |
| 1776 | static bfd_reloc_code_real_type offset_reloc[3] |
| 1777 | = {BFD_RELOC_UNUSED, BFD_RELOC_UNUSED, BFD_RELOC_UNUSED}; |
| 1778 | |
| 1779 | /* This is set to the resulting size of the instruction to be produced |
| 1780 | by mips16_ip if an explicit extension is used or by mips_ip if an |
| 1781 | explicit size is supplied. */ |
| 1782 | |
| 1783 | static unsigned int forced_insn_length; |
| 1784 | |
| 1785 | /* True if we are assembling an instruction. All dot symbols defined during |
| 1786 | this time should be treated as code labels. */ |
| 1787 | |
| 1788 | static bfd_boolean mips_assembling_insn; |
| 1789 | |
| 1790 | /* The pdr segment for per procedure frame/regmask info. Not used for |
| 1791 | ECOFF debugging. */ |
| 1792 | |
| 1793 | static segT pdr_seg; |
| 1794 | |
| 1795 | /* The default target format to use. */ |
| 1796 | |
| 1797 | #if defined (TE_FreeBSD) |
| 1798 | #define ELF_TARGET(PREFIX, ENDIAN) PREFIX "trad" ENDIAN "mips-freebsd" |
| 1799 | #elif defined (TE_TMIPS) |
| 1800 | #define ELF_TARGET(PREFIX, ENDIAN) PREFIX "trad" ENDIAN "mips" |
| 1801 | #else |
| 1802 | #define ELF_TARGET(PREFIX, ENDIAN) PREFIX ENDIAN "mips" |
| 1803 | #endif |
| 1804 | |
| 1805 | const char * |
| 1806 | mips_target_format (void) |
| 1807 | { |
| 1808 | switch (OUTPUT_FLAVOR) |
| 1809 | { |
| 1810 | case bfd_target_elf_flavour: |
| 1811 | #ifdef TE_VXWORKS |
| 1812 | if (!HAVE_64BIT_OBJECTS && !HAVE_NEWABI) |
| 1813 | return (target_big_endian |
| 1814 | ? "elf32-bigmips-vxworks" |
| 1815 | : "elf32-littlemips-vxworks"); |
| 1816 | #endif |
| 1817 | return (target_big_endian |
| 1818 | ? (HAVE_64BIT_OBJECTS |
| 1819 | ? ELF_TARGET ("elf64-", "big") |
| 1820 | : (HAVE_NEWABI |
| 1821 | ? ELF_TARGET ("elf32-n", "big") |
| 1822 | : ELF_TARGET ("elf32-", "big"))) |
| 1823 | : (HAVE_64BIT_OBJECTS |
| 1824 | ? ELF_TARGET ("elf64-", "little") |
| 1825 | : (HAVE_NEWABI |
| 1826 | ? ELF_TARGET ("elf32-n", "little") |
| 1827 | : ELF_TARGET ("elf32-", "little")))); |
| 1828 | default: |
| 1829 | abort (); |
| 1830 | return NULL; |
| 1831 | } |
| 1832 | } |
| 1833 | |
| 1834 | /* Return the ISA revision that is currently in use, or 0 if we are |
| 1835 | generating code for MIPS V or below. */ |
| 1836 | |
| 1837 | static int |
| 1838 | mips_isa_rev (void) |
| 1839 | { |
| 1840 | if (mips_opts.isa == ISA_MIPS32R2 || mips_opts.isa == ISA_MIPS64R2) |
| 1841 | return 2; |
| 1842 | |
| 1843 | /* microMIPS implies revision 2 or above. */ |
| 1844 | if (mips_opts.micromips) |
| 1845 | return 2; |
| 1846 | |
| 1847 | if (mips_opts.isa == ISA_MIPS32 || mips_opts.isa == ISA_MIPS64) |
| 1848 | return 1; |
| 1849 | |
| 1850 | return 0; |
| 1851 | } |
| 1852 | |
| 1853 | /* Return the mask of all ASEs that are revisions of those in FLAGS. */ |
| 1854 | |
| 1855 | static unsigned int |
| 1856 | mips_ase_mask (unsigned int flags) |
| 1857 | { |
| 1858 | unsigned int i; |
| 1859 | |
| 1860 | for (i = 0; i < ARRAY_SIZE (mips_ase_groups); i++) |
| 1861 | if (flags & mips_ase_groups[i]) |
| 1862 | flags |= mips_ase_groups[i]; |
| 1863 | return flags; |
| 1864 | } |
| 1865 | |
| 1866 | /* Check whether the current ISA supports ASE. Issue a warning if |
| 1867 | appropriate. */ |
| 1868 | |
| 1869 | static void |
| 1870 | mips_check_isa_supports_ase (const struct mips_ase *ase) |
| 1871 | { |
| 1872 | const char *base; |
| 1873 | int min_rev, size; |
| 1874 | static unsigned int warned_isa; |
| 1875 | static unsigned int warned_fp32; |
| 1876 | |
| 1877 | if (ISA_HAS_64BIT_REGS (mips_opts.isa)) |
| 1878 | min_rev = mips_opts.micromips ? ase->micromips64_rev : ase->mips64_rev; |
| 1879 | else |
| 1880 | min_rev = mips_opts.micromips ? ase->micromips32_rev : ase->mips32_rev; |
| 1881 | if ((min_rev < 0 || mips_isa_rev () < min_rev) |
| 1882 | && (warned_isa & ase->flags) != ase->flags) |
| 1883 | { |
| 1884 | warned_isa |= ase->flags; |
| 1885 | base = mips_opts.micromips ? "microMIPS" : "MIPS"; |
| 1886 | size = ISA_HAS_64BIT_REGS (mips_opts.isa) ? 64 : 32; |
| 1887 | if (min_rev < 0) |
| 1888 | as_warn (_("the %d-bit %s architecture does not support the" |
| 1889 | " `%s' extension"), size, base, ase->name); |
| 1890 | else |
| 1891 | as_warn (_("the `%s' extension requires %s%d revision %d or greater"), |
| 1892 | ase->name, base, size, min_rev); |
| 1893 | } |
| 1894 | if ((ase->flags & FP64_ASES) |
| 1895 | && mips_opts.fp32 |
| 1896 | && (warned_fp32 & ase->flags) != ase->flags) |
| 1897 | { |
| 1898 | warned_fp32 |= ase->flags; |
| 1899 | as_warn (_("the `%s' extension requires 64-bit FPRs"), ase->name); |
| 1900 | } |
| 1901 | } |
| 1902 | |
| 1903 | /* Check all enabled ASEs to see whether they are supported by the |
| 1904 | chosen architecture. */ |
| 1905 | |
| 1906 | static void |
| 1907 | mips_check_isa_supports_ases (void) |
| 1908 | { |
| 1909 | unsigned int i, mask; |
| 1910 | |
| 1911 | for (i = 0; i < ARRAY_SIZE (mips_ases); i++) |
| 1912 | { |
| 1913 | mask = mips_ase_mask (mips_ases[i].flags); |
| 1914 | if ((mips_opts.ase & mask) == mips_ases[i].flags) |
| 1915 | mips_check_isa_supports_ase (&mips_ases[i]); |
| 1916 | } |
| 1917 | } |
| 1918 | |
| 1919 | /* Set the state of ASE to ENABLED_P. Return the mask of ASE_* flags |
| 1920 | that were affected. */ |
| 1921 | |
| 1922 | static unsigned int |
| 1923 | mips_set_ase (const struct mips_ase *ase, bfd_boolean enabled_p) |
| 1924 | { |
| 1925 | unsigned int mask; |
| 1926 | |
| 1927 | mask = mips_ase_mask (ase->flags); |
| 1928 | mips_opts.ase &= ~mask; |
| 1929 | if (enabled_p) |
| 1930 | mips_opts.ase |= ase->flags; |
| 1931 | return mask; |
| 1932 | } |
| 1933 | |
| 1934 | /* Return the ASE called NAME, or null if none. */ |
| 1935 | |
| 1936 | static const struct mips_ase * |
| 1937 | mips_lookup_ase (const char *name) |
| 1938 | { |
| 1939 | unsigned int i; |
| 1940 | |
| 1941 | for (i = 0; i < ARRAY_SIZE (mips_ases); i++) |
| 1942 | if (strcmp (name, mips_ases[i].name) == 0) |
| 1943 | return &mips_ases[i]; |
| 1944 | return NULL; |
| 1945 | } |
| 1946 | |
| 1947 | /* Return the length of a microMIPS instruction in bytes. If bits of |
| 1948 | the mask beyond the low 16 are 0, then it is a 16-bit instruction. |
| 1949 | Otherwise assume a 32-bit instruction; 48-bit instructions (0x1f |
| 1950 | major opcode) will require further modifications to the opcode |
| 1951 | table. */ |
| 1952 | |
| 1953 | static inline unsigned int |
| 1954 | micromips_insn_length (const struct mips_opcode *mo) |
| 1955 | { |
| 1956 | return (mo->mask >> 16) == 0 ? 2 : 4; |
| 1957 | } |
| 1958 | |
| 1959 | /* Return the length of MIPS16 instruction OPCODE. */ |
| 1960 | |
| 1961 | static inline unsigned int |
| 1962 | mips16_opcode_length (unsigned long opcode) |
| 1963 | { |
| 1964 | return (opcode >> 16) == 0 ? 2 : 4; |
| 1965 | } |
| 1966 | |
| 1967 | /* Return the length of instruction INSN. */ |
| 1968 | |
| 1969 | static inline unsigned int |
| 1970 | insn_length (const struct mips_cl_insn *insn) |
| 1971 | { |
| 1972 | if (mips_opts.micromips) |
| 1973 | return micromips_insn_length (insn->insn_mo); |
| 1974 | else if (mips_opts.mips16) |
| 1975 | return mips16_opcode_length (insn->insn_opcode); |
| 1976 | else |
| 1977 | return 4; |
| 1978 | } |
| 1979 | |
| 1980 | /* Initialise INSN from opcode entry MO. Leave its position unspecified. */ |
| 1981 | |
| 1982 | static void |
| 1983 | create_insn (struct mips_cl_insn *insn, const struct mips_opcode *mo) |
| 1984 | { |
| 1985 | size_t i; |
| 1986 | |
| 1987 | insn->insn_mo = mo; |
| 1988 | insn->insn_opcode = mo->match; |
| 1989 | insn->frag = NULL; |
| 1990 | insn->where = 0; |
| 1991 | for (i = 0; i < ARRAY_SIZE (insn->fixp); i++) |
| 1992 | insn->fixp[i] = NULL; |
| 1993 | insn->fixed_p = (mips_opts.noreorder > 0); |
| 1994 | insn->noreorder_p = (mips_opts.noreorder > 0); |
| 1995 | insn->mips16_absolute_jump_p = 0; |
| 1996 | insn->complete_p = 0; |
| 1997 | insn->cleared_p = 0; |
| 1998 | } |
| 1999 | |
| 2000 | /* Get a list of all the operands in INSN. */ |
| 2001 | |
| 2002 | static const struct mips_operand_array * |
| 2003 | insn_operands (const struct mips_cl_insn *insn) |
| 2004 | { |
| 2005 | if (insn->insn_mo >= &mips_opcodes[0] |
| 2006 | && insn->insn_mo < &mips_opcodes[NUMOPCODES]) |
| 2007 | return &mips_operands[insn->insn_mo - &mips_opcodes[0]]; |
| 2008 | |
| 2009 | if (insn->insn_mo >= &mips16_opcodes[0] |
| 2010 | && insn->insn_mo < &mips16_opcodes[bfd_mips16_num_opcodes]) |
| 2011 | return &mips16_operands[insn->insn_mo - &mips16_opcodes[0]]; |
| 2012 | |
| 2013 | if (insn->insn_mo >= µmips_opcodes[0] |
| 2014 | && insn->insn_mo < µmips_opcodes[bfd_micromips_num_opcodes]) |
| 2015 | return µmips_operands[insn->insn_mo - µmips_opcodes[0]]; |
| 2016 | |
| 2017 | abort (); |
| 2018 | } |
| 2019 | |
| 2020 | /* Get a description of operand OPNO of INSN. */ |
| 2021 | |
| 2022 | static const struct mips_operand * |
| 2023 | insn_opno (const struct mips_cl_insn *insn, unsigned opno) |
| 2024 | { |
| 2025 | const struct mips_operand_array *operands; |
| 2026 | |
| 2027 | operands = insn_operands (insn); |
| 2028 | if (opno >= MAX_OPERANDS || !operands->operand[opno]) |
| 2029 | abort (); |
| 2030 | return operands->operand[opno]; |
| 2031 | } |
| 2032 | |
| 2033 | /* Install UVAL as the value of OPERAND in INSN. */ |
| 2034 | |
| 2035 | static inline void |
| 2036 | insn_insert_operand (struct mips_cl_insn *insn, |
| 2037 | const struct mips_operand *operand, unsigned int uval) |
| 2038 | { |
| 2039 | insn->insn_opcode = mips_insert_operand (operand, insn->insn_opcode, uval); |
| 2040 | } |
| 2041 | |
| 2042 | /* Extract the value of OPERAND from INSN. */ |
| 2043 | |
| 2044 | static inline unsigned |
| 2045 | insn_extract_operand (const struct mips_cl_insn *insn, |
| 2046 | const struct mips_operand *operand) |
| 2047 | { |
| 2048 | return mips_extract_operand (operand, insn->insn_opcode); |
| 2049 | } |
| 2050 | |
| 2051 | /* Record the current MIPS16/microMIPS mode in now_seg. */ |
| 2052 | |
| 2053 | static void |
| 2054 | mips_record_compressed_mode (void) |
| 2055 | { |
| 2056 | segment_info_type *si; |
| 2057 | |
| 2058 | si = seg_info (now_seg); |
| 2059 | if (si->tc_segment_info_data.mips16 != mips_opts.mips16) |
| 2060 | si->tc_segment_info_data.mips16 = mips_opts.mips16; |
| 2061 | if (si->tc_segment_info_data.micromips != mips_opts.micromips) |
| 2062 | si->tc_segment_info_data.micromips = mips_opts.micromips; |
| 2063 | } |
| 2064 | |
| 2065 | /* Read a standard MIPS instruction from BUF. */ |
| 2066 | |
| 2067 | static unsigned long |
| 2068 | read_insn (char *buf) |
| 2069 | { |
| 2070 | if (target_big_endian) |
| 2071 | return bfd_getb32 ((bfd_byte *) buf); |
| 2072 | else |
| 2073 | return bfd_getl32 ((bfd_byte *) buf); |
| 2074 | } |
| 2075 | |
| 2076 | /* Write standard MIPS instruction INSN to BUF. Return a pointer to |
| 2077 | the next byte. */ |
| 2078 | |
| 2079 | static char * |
| 2080 | write_insn (char *buf, unsigned int insn) |
| 2081 | { |
| 2082 | md_number_to_chars (buf, insn, 4); |
| 2083 | return buf + 4; |
| 2084 | } |
| 2085 | |
| 2086 | /* Read a microMIPS or MIPS16 opcode from BUF, given that it |
| 2087 | has length LENGTH. */ |
| 2088 | |
| 2089 | static unsigned long |
| 2090 | read_compressed_insn (char *buf, unsigned int length) |
| 2091 | { |
| 2092 | unsigned long insn; |
| 2093 | unsigned int i; |
| 2094 | |
| 2095 | insn = 0; |
| 2096 | for (i = 0; i < length; i += 2) |
| 2097 | { |
| 2098 | insn <<= 16; |
| 2099 | if (target_big_endian) |
| 2100 | insn |= bfd_getb16 ((char *) buf); |
| 2101 | else |
| 2102 | insn |= bfd_getl16 ((char *) buf); |
| 2103 | buf += 2; |
| 2104 | } |
| 2105 | return insn; |
| 2106 | } |
| 2107 | |
| 2108 | /* Write microMIPS or MIPS16 instruction INSN to BUF, given that the |
| 2109 | instruction is LENGTH bytes long. Return a pointer to the next byte. */ |
| 2110 | |
| 2111 | static char * |
| 2112 | write_compressed_insn (char *buf, unsigned int insn, unsigned int length) |
| 2113 | { |
| 2114 | unsigned int i; |
| 2115 | |
| 2116 | for (i = 0; i < length; i += 2) |
| 2117 | md_number_to_chars (buf + i, insn >> ((length - i - 2) * 8), 2); |
| 2118 | return buf + length; |
| 2119 | } |
| 2120 | |
| 2121 | /* Install INSN at the location specified by its "frag" and "where" fields. */ |
| 2122 | |
| 2123 | static void |
| 2124 | install_insn (const struct mips_cl_insn *insn) |
| 2125 | { |
| 2126 | char *f = insn->frag->fr_literal + insn->where; |
| 2127 | if (HAVE_CODE_COMPRESSION) |
| 2128 | write_compressed_insn (f, insn->insn_opcode, insn_length (insn)); |
| 2129 | else |
| 2130 | write_insn (f, insn->insn_opcode); |
| 2131 | mips_record_compressed_mode (); |
| 2132 | } |
| 2133 | |
| 2134 | /* Move INSN to offset WHERE in FRAG. Adjust the fixups accordingly |
| 2135 | and install the opcode in the new location. */ |
| 2136 | |
| 2137 | static void |
| 2138 | move_insn (struct mips_cl_insn *insn, fragS *frag, long where) |
| 2139 | { |
| 2140 | size_t i; |
| 2141 | |
| 2142 | insn->frag = frag; |
| 2143 | insn->where = where; |
| 2144 | for (i = 0; i < ARRAY_SIZE (insn->fixp); i++) |
| 2145 | if (insn->fixp[i] != NULL) |
| 2146 | { |
| 2147 | insn->fixp[i]->fx_frag = frag; |
| 2148 | insn->fixp[i]->fx_where = where; |
| 2149 | } |
| 2150 | install_insn (insn); |
| 2151 | } |
| 2152 | |
| 2153 | /* Add INSN to the end of the output. */ |
| 2154 | |
| 2155 | static void |
| 2156 | add_fixed_insn (struct mips_cl_insn *insn) |
| 2157 | { |
| 2158 | char *f = frag_more (insn_length (insn)); |
| 2159 | move_insn (insn, frag_now, f - frag_now->fr_literal); |
| 2160 | } |
| 2161 | |
| 2162 | /* Start a variant frag and move INSN to the start of the variant part, |
| 2163 | marking it as fixed. The other arguments are as for frag_var. */ |
| 2164 | |
| 2165 | static void |
| 2166 | add_relaxed_insn (struct mips_cl_insn *insn, int max_chars, int var, |
| 2167 | relax_substateT subtype, symbolS *symbol, offsetT offset) |
| 2168 | { |
| 2169 | frag_grow (max_chars); |
| 2170 | move_insn (insn, frag_now, frag_more (0) - frag_now->fr_literal); |
| 2171 | insn->fixed_p = 1; |
| 2172 | frag_var (rs_machine_dependent, max_chars, var, |
| 2173 | subtype, symbol, offset, NULL); |
| 2174 | } |
| 2175 | |
| 2176 | /* Insert N copies of INSN into the history buffer, starting at |
| 2177 | position FIRST. Neither FIRST nor N need to be clipped. */ |
| 2178 | |
| 2179 | static void |
| 2180 | insert_into_history (unsigned int first, unsigned int n, |
| 2181 | const struct mips_cl_insn *insn) |
| 2182 | { |
| 2183 | if (mips_relax.sequence != 2) |
| 2184 | { |
| 2185 | unsigned int i; |
| 2186 | |
| 2187 | for (i = ARRAY_SIZE (history); i-- > first;) |
| 2188 | if (i >= first + n) |
| 2189 | history[i] = history[i - n]; |
| 2190 | else |
| 2191 | history[i] = *insn; |
| 2192 | } |
| 2193 | } |
| 2194 | |
| 2195 | /* Clear the error in insn_error. */ |
| 2196 | |
| 2197 | static void |
| 2198 | clear_insn_error (void) |
| 2199 | { |
| 2200 | memset (&insn_error, 0, sizeof (insn_error)); |
| 2201 | } |
| 2202 | |
| 2203 | /* Possibly record error message MSG for the current instruction. |
| 2204 | If the error is about a particular argument, ARGNUM is the 1-based |
| 2205 | number of that argument, otherwise it is 0. FORMAT is the format |
| 2206 | of MSG. Return true if MSG was used, false if the current message |
| 2207 | was kept. */ |
| 2208 | |
| 2209 | static bfd_boolean |
| 2210 | set_insn_error_format (int argnum, enum mips_insn_error_format format, |
| 2211 | const char *msg) |
| 2212 | { |
| 2213 | if (argnum == 0) |
| 2214 | { |
| 2215 | /* Give priority to errors against specific arguments, and to |
| 2216 | the first whole-instruction message. */ |
| 2217 | if (insn_error.msg) |
| 2218 | return FALSE; |
| 2219 | } |
| 2220 | else |
| 2221 | { |
| 2222 | /* Keep insn_error if it is against a later argument. */ |
| 2223 | if (argnum < insn_error.min_argnum) |
| 2224 | return FALSE; |
| 2225 | |
| 2226 | /* If both errors are against the same argument but are different, |
| 2227 | give up on reporting a specific error for this argument. |
| 2228 | See the comment about mips_insn_error for details. */ |
| 2229 | if (argnum == insn_error.min_argnum |
| 2230 | && insn_error.msg |
| 2231 | && strcmp (insn_error.msg, msg) != 0) |
| 2232 | { |
| 2233 | insn_error.msg = 0; |
| 2234 | insn_error.min_argnum += 1; |
| 2235 | return FALSE; |
| 2236 | } |
| 2237 | } |
| 2238 | insn_error.min_argnum = argnum; |
| 2239 | insn_error.format = format; |
| 2240 | insn_error.msg = msg; |
| 2241 | return TRUE; |
| 2242 | } |
| 2243 | |
| 2244 | /* Record an instruction error with no % format fields. ARGNUM and MSG are |
| 2245 | as for set_insn_error_format. */ |
| 2246 | |
| 2247 | static void |
| 2248 | set_insn_error (int argnum, const char *msg) |
| 2249 | { |
| 2250 | set_insn_error_format (argnum, ERR_FMT_PLAIN, msg); |
| 2251 | } |
| 2252 | |
| 2253 | /* Record an instruction error with one %d field I. ARGNUM and MSG are |
| 2254 | as for set_insn_error_format. */ |
| 2255 | |
| 2256 | static void |
| 2257 | set_insn_error_i (int argnum, const char *msg, int i) |
| 2258 | { |
| 2259 | if (set_insn_error_format (argnum, ERR_FMT_I, msg)) |
| 2260 | insn_error.u.i = i; |
| 2261 | } |
| 2262 | |
| 2263 | /* Record an instruction error with two %s fields S1 and S2. ARGNUM and MSG |
| 2264 | are as for set_insn_error_format. */ |
| 2265 | |
| 2266 | static void |
| 2267 | set_insn_error_ss (int argnum, const char *msg, const char *s1, const char *s2) |
| 2268 | { |
| 2269 | if (set_insn_error_format (argnum, ERR_FMT_SS, msg)) |
| 2270 | { |
| 2271 | insn_error.u.ss[0] = s1; |
| 2272 | insn_error.u.ss[1] = s2; |
| 2273 | } |
| 2274 | } |
| 2275 | |
| 2276 | /* Report the error in insn_error, which is against assembly code STR. */ |
| 2277 | |
| 2278 | static void |
| 2279 | report_insn_error (const char *str) |
| 2280 | { |
| 2281 | const char *msg; |
| 2282 | |
| 2283 | msg = ACONCAT ((insn_error.msg, " `%s'", NULL)); |
| 2284 | switch (insn_error.format) |
| 2285 | { |
| 2286 | case ERR_FMT_PLAIN: |
| 2287 | as_bad (msg, str); |
| 2288 | break; |
| 2289 | |
| 2290 | case ERR_FMT_I: |
| 2291 | as_bad (msg, insn_error.u.i, str); |
| 2292 | break; |
| 2293 | |
| 2294 | case ERR_FMT_SS: |
| 2295 | as_bad (msg, insn_error.u.ss[0], insn_error.u.ss[1], str); |
| 2296 | break; |
| 2297 | } |
| 2298 | } |
| 2299 | |
| 2300 | /* Initialize vr4120_conflicts. There is a bit of duplication here: |
| 2301 | the idea is to make it obvious at a glance that each errata is |
| 2302 | included. */ |
| 2303 | |
| 2304 | static void |
| 2305 | init_vr4120_conflicts (void) |
| 2306 | { |
| 2307 | #define CONFLICT(FIRST, SECOND) \ |
| 2308 | vr4120_conflicts[FIX_VR4120_##FIRST] |= 1 << FIX_VR4120_##SECOND |
| 2309 | |
| 2310 | /* Errata 21 - [D]DIV[U] after [D]MACC */ |
| 2311 | CONFLICT (MACC, DIV); |
| 2312 | CONFLICT (DMACC, DIV); |
| 2313 | |
| 2314 | /* Errata 23 - Continuous DMULT[U]/DMACC instructions. */ |
| 2315 | CONFLICT (DMULT, DMULT); |
| 2316 | CONFLICT (DMULT, DMACC); |
| 2317 | CONFLICT (DMACC, DMULT); |
| 2318 | CONFLICT (DMACC, DMACC); |
| 2319 | |
| 2320 | /* Errata 24 - MT{LO,HI} after [D]MACC */ |
| 2321 | CONFLICT (MACC, MTHILO); |
| 2322 | CONFLICT (DMACC, MTHILO); |
| 2323 | |
| 2324 | /* VR4181A errata MD(1): "If a MULT, MULTU, DMULT or DMULTU |
| 2325 | instruction is executed immediately after a MACC or DMACC |
| 2326 | instruction, the result of [either instruction] is incorrect." */ |
| 2327 | CONFLICT (MACC, MULT); |
| 2328 | CONFLICT (MACC, DMULT); |
| 2329 | CONFLICT (DMACC, MULT); |
| 2330 | CONFLICT (DMACC, DMULT); |
| 2331 | |
| 2332 | /* VR4181A errata MD(4): "If a MACC or DMACC instruction is |
| 2333 | executed immediately after a DMULT, DMULTU, DIV, DIVU, |
| 2334 | DDIV or DDIVU instruction, the result of the MACC or |
| 2335 | DMACC instruction is incorrect.". */ |
| 2336 | CONFLICT (DMULT, MACC); |
| 2337 | CONFLICT (DMULT, DMACC); |
| 2338 | CONFLICT (DIV, MACC); |
| 2339 | CONFLICT (DIV, DMACC); |
| 2340 | |
| 2341 | #undef CONFLICT |
| 2342 | } |
| 2343 | |
| 2344 | struct regname { |
| 2345 | const char *name; |
| 2346 | unsigned int num; |
| 2347 | }; |
| 2348 | |
| 2349 | #define RNUM_MASK 0x00000ff |
| 2350 | #define RTYPE_MASK 0x0efff00 |
| 2351 | #define RTYPE_NUM 0x0000100 |
| 2352 | #define RTYPE_FPU 0x0000200 |
| 2353 | #define RTYPE_FCC 0x0000400 |
| 2354 | #define RTYPE_VEC 0x0000800 |
| 2355 | #define RTYPE_GP 0x0001000 |
| 2356 | #define RTYPE_CP0 0x0002000 |
| 2357 | #define RTYPE_PC 0x0004000 |
| 2358 | #define RTYPE_ACC 0x0008000 |
| 2359 | #define RTYPE_CCC 0x0010000 |
| 2360 | #define RTYPE_VI 0x0020000 |
| 2361 | #define RTYPE_VF 0x0040000 |
| 2362 | #define RTYPE_R5900_I 0x0080000 |
| 2363 | #define RTYPE_R5900_Q 0x0100000 |
| 2364 | #define RTYPE_R5900_R 0x0200000 |
| 2365 | #define RTYPE_R5900_ACC 0x0400000 |
| 2366 | #define RWARN 0x8000000 |
| 2367 | |
| 2368 | #define GENERIC_REGISTER_NUMBERS \ |
| 2369 | {"$0", RTYPE_NUM | 0}, \ |
| 2370 | {"$1", RTYPE_NUM | 1}, \ |
| 2371 | {"$2", RTYPE_NUM | 2}, \ |
| 2372 | {"$3", RTYPE_NUM | 3}, \ |
| 2373 | {"$4", RTYPE_NUM | 4}, \ |
| 2374 | {"$5", RTYPE_NUM | 5}, \ |
| 2375 | {"$6", RTYPE_NUM | 6}, \ |
| 2376 | {"$7", RTYPE_NUM | 7}, \ |
| 2377 | {"$8", RTYPE_NUM | 8}, \ |
| 2378 | {"$9", RTYPE_NUM | 9}, \ |
| 2379 | {"$10", RTYPE_NUM | 10}, \ |
| 2380 | {"$11", RTYPE_NUM | 11}, \ |
| 2381 | {"$12", RTYPE_NUM | 12}, \ |
| 2382 | {"$13", RTYPE_NUM | 13}, \ |
| 2383 | {"$14", RTYPE_NUM | 14}, \ |
| 2384 | {"$15", RTYPE_NUM | 15}, \ |
| 2385 | {"$16", RTYPE_NUM | 16}, \ |
| 2386 | {"$17", RTYPE_NUM | 17}, \ |
| 2387 | {"$18", RTYPE_NUM | 18}, \ |
| 2388 | {"$19", RTYPE_NUM | 19}, \ |
| 2389 | {"$20", RTYPE_NUM | 20}, \ |
| 2390 | {"$21", RTYPE_NUM | 21}, \ |
| 2391 | {"$22", RTYPE_NUM | 22}, \ |
| 2392 | {"$23", RTYPE_NUM | 23}, \ |
| 2393 | {"$24", RTYPE_NUM | 24}, \ |
| 2394 | {"$25", RTYPE_NUM | 25}, \ |
| 2395 | {"$26", RTYPE_NUM | 26}, \ |
| 2396 | {"$27", RTYPE_NUM | 27}, \ |
| 2397 | {"$28", RTYPE_NUM | 28}, \ |
| 2398 | {"$29", RTYPE_NUM | 29}, \ |
| 2399 | {"$30", RTYPE_NUM | 30}, \ |
| 2400 | {"$31", RTYPE_NUM | 31} |
| 2401 | |
| 2402 | #define FPU_REGISTER_NAMES \ |
| 2403 | {"$f0", RTYPE_FPU | 0}, \ |
| 2404 | {"$f1", RTYPE_FPU | 1}, \ |
| 2405 | {"$f2", RTYPE_FPU | 2}, \ |
| 2406 | {"$f3", RTYPE_FPU | 3}, \ |
| 2407 | {"$f4", RTYPE_FPU | 4}, \ |
| 2408 | {"$f5", RTYPE_FPU | 5}, \ |
| 2409 | {"$f6", RTYPE_FPU | 6}, \ |
| 2410 | {"$f7", RTYPE_FPU | 7}, \ |
| 2411 | {"$f8", RTYPE_FPU | 8}, \ |
| 2412 | {"$f9", RTYPE_FPU | 9}, \ |
| 2413 | {"$f10", RTYPE_FPU | 10}, \ |
| 2414 | {"$f11", RTYPE_FPU | 11}, \ |
| 2415 | {"$f12", RTYPE_FPU | 12}, \ |
| 2416 | {"$f13", RTYPE_FPU | 13}, \ |
| 2417 | {"$f14", RTYPE_FPU | 14}, \ |
| 2418 | {"$f15", RTYPE_FPU | 15}, \ |
| 2419 | {"$f16", RTYPE_FPU | 16}, \ |
| 2420 | {"$f17", RTYPE_FPU | 17}, \ |
| 2421 | {"$f18", RTYPE_FPU | 18}, \ |
| 2422 | {"$f19", RTYPE_FPU | 19}, \ |
| 2423 | {"$f20", RTYPE_FPU | 20}, \ |
| 2424 | {"$f21", RTYPE_FPU | 21}, \ |
| 2425 | {"$f22", RTYPE_FPU | 22}, \ |
| 2426 | {"$f23", RTYPE_FPU | 23}, \ |
| 2427 | {"$f24", RTYPE_FPU | 24}, \ |
| 2428 | {"$f25", RTYPE_FPU | 25}, \ |
| 2429 | {"$f26", RTYPE_FPU | 26}, \ |
| 2430 | {"$f27", RTYPE_FPU | 27}, \ |
| 2431 | {"$f28", RTYPE_FPU | 28}, \ |
| 2432 | {"$f29", RTYPE_FPU | 29}, \ |
| 2433 | {"$f30", RTYPE_FPU | 30}, \ |
| 2434 | {"$f31", RTYPE_FPU | 31} |
| 2435 | |
| 2436 | #define FPU_CONDITION_CODE_NAMES \ |
| 2437 | {"$fcc0", RTYPE_FCC | 0}, \ |
| 2438 | {"$fcc1", RTYPE_FCC | 1}, \ |
| 2439 | {"$fcc2", RTYPE_FCC | 2}, \ |
| 2440 | {"$fcc3", RTYPE_FCC | 3}, \ |
| 2441 | {"$fcc4", RTYPE_FCC | 4}, \ |
| 2442 | {"$fcc5", RTYPE_FCC | 5}, \ |
| 2443 | {"$fcc6", RTYPE_FCC | 6}, \ |
| 2444 | {"$fcc7", RTYPE_FCC | 7} |
| 2445 | |
| 2446 | #define COPROC_CONDITION_CODE_NAMES \ |
| 2447 | {"$cc0", RTYPE_FCC | RTYPE_CCC | 0}, \ |
| 2448 | {"$cc1", RTYPE_FCC | RTYPE_CCC | 1}, \ |
| 2449 | {"$cc2", RTYPE_FCC | RTYPE_CCC | 2}, \ |
| 2450 | {"$cc3", RTYPE_FCC | RTYPE_CCC | 3}, \ |
| 2451 | {"$cc4", RTYPE_FCC | RTYPE_CCC | 4}, \ |
| 2452 | {"$cc5", RTYPE_FCC | RTYPE_CCC | 5}, \ |
| 2453 | {"$cc6", RTYPE_FCC | RTYPE_CCC | 6}, \ |
| 2454 | {"$cc7", RTYPE_FCC | RTYPE_CCC | 7} |
| 2455 | |
| 2456 | #define N32N64_SYMBOLIC_REGISTER_NAMES \ |
| 2457 | {"$a4", RTYPE_GP | 8}, \ |
| 2458 | {"$a5", RTYPE_GP | 9}, \ |
| 2459 | {"$a6", RTYPE_GP | 10}, \ |
| 2460 | {"$a7", RTYPE_GP | 11}, \ |
| 2461 | {"$ta0", RTYPE_GP | 8}, /* alias for $a4 */ \ |
| 2462 | {"$ta1", RTYPE_GP | 9}, /* alias for $a5 */ \ |
| 2463 | {"$ta2", RTYPE_GP | 10}, /* alias for $a6 */ \ |
| 2464 | {"$ta3", RTYPE_GP | 11}, /* alias for $a7 */ \ |
| 2465 | {"$t0", RTYPE_GP | 12}, \ |
| 2466 | {"$t1", RTYPE_GP | 13}, \ |
| 2467 | {"$t2", RTYPE_GP | 14}, \ |
| 2468 | {"$t3", RTYPE_GP | 15} |
| 2469 | |
| 2470 | #define O32_SYMBOLIC_REGISTER_NAMES \ |
| 2471 | {"$t0", RTYPE_GP | 8}, \ |
| 2472 | {"$t1", RTYPE_GP | 9}, \ |
| 2473 | {"$t2", RTYPE_GP | 10}, \ |
| 2474 | {"$t3", RTYPE_GP | 11}, \ |
| 2475 | {"$t4", RTYPE_GP | 12}, \ |
| 2476 | {"$t5", RTYPE_GP | 13}, \ |
| 2477 | {"$t6", RTYPE_GP | 14}, \ |
| 2478 | {"$t7", RTYPE_GP | 15}, \ |
| 2479 | {"$ta0", RTYPE_GP | 12}, /* alias for $t4 */ \ |
| 2480 | {"$ta1", RTYPE_GP | 13}, /* alias for $t5 */ \ |
| 2481 | {"$ta2", RTYPE_GP | 14}, /* alias for $t6 */ \ |
| 2482 | {"$ta3", RTYPE_GP | 15} /* alias for $t7 */ |
| 2483 | |
| 2484 | /* Remaining symbolic register names */ |
| 2485 | #define SYMBOLIC_REGISTER_NAMES \ |
| 2486 | {"$zero", RTYPE_GP | 0}, \ |
| 2487 | {"$at", RTYPE_GP | 1}, \ |
| 2488 | {"$AT", RTYPE_GP | 1}, \ |
| 2489 | {"$v0", RTYPE_GP | 2}, \ |
| 2490 | {"$v1", RTYPE_GP | 3}, \ |
| 2491 | {"$a0", RTYPE_GP | 4}, \ |
| 2492 | {"$a1", RTYPE_GP | 5}, \ |
| 2493 | {"$a2", RTYPE_GP | 6}, \ |
| 2494 | {"$a3", RTYPE_GP | 7}, \ |
| 2495 | {"$s0", RTYPE_GP | 16}, \ |
| 2496 | {"$s1", RTYPE_GP | 17}, \ |
| 2497 | {"$s2", RTYPE_GP | 18}, \ |
| 2498 | {"$s3", RTYPE_GP | 19}, \ |
| 2499 | {"$s4", RTYPE_GP | 20}, \ |
| 2500 | {"$s5", RTYPE_GP | 21}, \ |
| 2501 | {"$s6", RTYPE_GP | 22}, \ |
| 2502 | {"$s7", RTYPE_GP | 23}, \ |
| 2503 | {"$t8", RTYPE_GP | 24}, \ |
| 2504 | {"$t9", RTYPE_GP | 25}, \ |
| 2505 | {"$k0", RTYPE_GP | 26}, \ |
| 2506 | {"$kt0", RTYPE_GP | 26}, \ |
| 2507 | {"$k1", RTYPE_GP | 27}, \ |
| 2508 | {"$kt1", RTYPE_GP | 27}, \ |
| 2509 | {"$gp", RTYPE_GP | 28}, \ |
| 2510 | {"$sp", RTYPE_GP | 29}, \ |
| 2511 | {"$s8", RTYPE_GP | 30}, \ |
| 2512 | {"$fp", RTYPE_GP | 30}, \ |
| 2513 | {"$ra", RTYPE_GP | 31} |
| 2514 | |
| 2515 | #define MIPS16_SPECIAL_REGISTER_NAMES \ |
| 2516 | {"$pc", RTYPE_PC | 0} |
| 2517 | |
| 2518 | #define MDMX_VECTOR_REGISTER_NAMES \ |
| 2519 | /* {"$v0", RTYPE_VEC | 0}, clash with REG 2 above */ \ |
| 2520 | /* {"$v1", RTYPE_VEC | 1}, clash with REG 3 above */ \ |
| 2521 | {"$v2", RTYPE_VEC | 2}, \ |
| 2522 | {"$v3", RTYPE_VEC | 3}, \ |
| 2523 | {"$v4", RTYPE_VEC | 4}, \ |
| 2524 | {"$v5", RTYPE_VEC | 5}, \ |
| 2525 | {"$v6", RTYPE_VEC | 6}, \ |
| 2526 | {"$v7", RTYPE_VEC | 7}, \ |
| 2527 | {"$v8", RTYPE_VEC | 8}, \ |
| 2528 | {"$v9", RTYPE_VEC | 9}, \ |
| 2529 | {"$v10", RTYPE_VEC | 10}, \ |
| 2530 | {"$v11", RTYPE_VEC | 11}, \ |
| 2531 | {"$v12", RTYPE_VEC | 12}, \ |
| 2532 | {"$v13", RTYPE_VEC | 13}, \ |
| 2533 | {"$v14", RTYPE_VEC | 14}, \ |
| 2534 | {"$v15", RTYPE_VEC | 15}, \ |
| 2535 | {"$v16", RTYPE_VEC | 16}, \ |
| 2536 | {"$v17", RTYPE_VEC | 17}, \ |
| 2537 | {"$v18", RTYPE_VEC | 18}, \ |
| 2538 | {"$v19", RTYPE_VEC | 19}, \ |
| 2539 | {"$v20", RTYPE_VEC | 20}, \ |
| 2540 | {"$v21", RTYPE_VEC | 21}, \ |
| 2541 | {"$v22", RTYPE_VEC | 22}, \ |
| 2542 | {"$v23", RTYPE_VEC | 23}, \ |
| 2543 | {"$v24", RTYPE_VEC | 24}, \ |
| 2544 | {"$v25", RTYPE_VEC | 25}, \ |
| 2545 | {"$v26", RTYPE_VEC | 26}, \ |
| 2546 | {"$v27", RTYPE_VEC | 27}, \ |
| 2547 | {"$v28", RTYPE_VEC | 28}, \ |
| 2548 | {"$v29", RTYPE_VEC | 29}, \ |
| 2549 | {"$v30", RTYPE_VEC | 30}, \ |
| 2550 | {"$v31", RTYPE_VEC | 31} |
| 2551 | |
| 2552 | #define R5900_I_NAMES \ |
| 2553 | {"$I", RTYPE_R5900_I | 0} |
| 2554 | |
| 2555 | #define R5900_Q_NAMES \ |
| 2556 | {"$Q", RTYPE_R5900_Q | 0} |
| 2557 | |
| 2558 | #define R5900_R_NAMES \ |
| 2559 | {"$R", RTYPE_R5900_R | 0} |
| 2560 | |
| 2561 | #define R5900_ACC_NAMES \ |
| 2562 | {"$ACC", RTYPE_R5900_ACC | 0 } |
| 2563 | |
| 2564 | #define MIPS_DSP_ACCUMULATOR_NAMES \ |
| 2565 | {"$ac0", RTYPE_ACC | 0}, \ |
| 2566 | {"$ac1", RTYPE_ACC | 1}, \ |
| 2567 | {"$ac2", RTYPE_ACC | 2}, \ |
| 2568 | {"$ac3", RTYPE_ACC | 3} |
| 2569 | |
| 2570 | static const struct regname reg_names[] = { |
| 2571 | GENERIC_REGISTER_NUMBERS, |
| 2572 | FPU_REGISTER_NAMES, |
| 2573 | FPU_CONDITION_CODE_NAMES, |
| 2574 | COPROC_CONDITION_CODE_NAMES, |
| 2575 | |
| 2576 | /* The $txx registers depends on the abi, |
| 2577 | these will be added later into the symbol table from |
| 2578 | one of the tables below once mips_abi is set after |
| 2579 | parsing of arguments from the command line. */ |
| 2580 | SYMBOLIC_REGISTER_NAMES, |
| 2581 | |
| 2582 | MIPS16_SPECIAL_REGISTER_NAMES, |
| 2583 | MDMX_VECTOR_REGISTER_NAMES, |
| 2584 | R5900_I_NAMES, |
| 2585 | R5900_Q_NAMES, |
| 2586 | R5900_R_NAMES, |
| 2587 | R5900_ACC_NAMES, |
| 2588 | MIPS_DSP_ACCUMULATOR_NAMES, |
| 2589 | {0, 0} |
| 2590 | }; |
| 2591 | |
| 2592 | static const struct regname reg_names_o32[] = { |
| 2593 | O32_SYMBOLIC_REGISTER_NAMES, |
| 2594 | {0, 0} |
| 2595 | }; |
| 2596 | |
| 2597 | static const struct regname reg_names_n32n64[] = { |
| 2598 | N32N64_SYMBOLIC_REGISTER_NAMES, |
| 2599 | {0, 0} |
| 2600 | }; |
| 2601 | |
| 2602 | /* Register symbols $v0 and $v1 map to GPRs 2 and 3, but they can also be |
| 2603 | interpreted as vector registers 0 and 1. If SYMVAL is the value of one |
| 2604 | of these register symbols, return the associated vector register, |
| 2605 | otherwise return SYMVAL itself. */ |
| 2606 | |
| 2607 | static unsigned int |
| 2608 | mips_prefer_vec_regno (unsigned int symval) |
| 2609 | { |
| 2610 | if ((symval & -2) == (RTYPE_GP | 2)) |
| 2611 | return RTYPE_VEC | (symval & 1); |
| 2612 | return symval; |
| 2613 | } |
| 2614 | |
| 2615 | /* Return true if string [S, E) is a valid register name, storing its |
| 2616 | symbol value in *SYMVAL_PTR if so. */ |
| 2617 | |
| 2618 | static bfd_boolean |
| 2619 | mips_parse_register_1 (char *s, char *e, unsigned int *symval_ptr) |
| 2620 | { |
| 2621 | char save_c; |
| 2622 | symbolS *symbol; |
| 2623 | |
| 2624 | /* Terminate name. */ |
| 2625 | save_c = *e; |
| 2626 | *e = '\0'; |
| 2627 | |
| 2628 | /* Look up the name. */ |
| 2629 | symbol = symbol_find (s); |
| 2630 | *e = save_c; |
| 2631 | |
| 2632 | if (!symbol || S_GET_SEGMENT (symbol) != reg_section) |
| 2633 | return FALSE; |
| 2634 | |
| 2635 | *symval_ptr = S_GET_VALUE (symbol); |
| 2636 | return TRUE; |
| 2637 | } |
| 2638 | |
| 2639 | /* Return true if the string at *SPTR is a valid register name. Allow it |
| 2640 | to have a VU0-style channel suffix of the form x?y?z?w? if CHANNELS_PTR |
| 2641 | is nonnull. |
| 2642 | |
| 2643 | When returning true, move *SPTR past the register, store the |
| 2644 | register's symbol value in *SYMVAL_PTR and the channel mask in |
| 2645 | *CHANNELS_PTR (if nonnull). The symbol value includes the register |
| 2646 | number (RNUM_MASK) and register type (RTYPE_MASK). The channel mask |
| 2647 | is a 4-bit value of the form XYZW and is 0 if no suffix was given. */ |
| 2648 | |
| 2649 | static bfd_boolean |
| 2650 | mips_parse_register (char **sptr, unsigned int *symval_ptr, |
| 2651 | unsigned int *channels_ptr) |
| 2652 | { |
| 2653 | char *s, *e, *m; |
| 2654 | const char *q; |
| 2655 | unsigned int channels, symval, bit; |
| 2656 | |
| 2657 | /* Find end of name. */ |
| 2658 | s = e = *sptr; |
| 2659 | if (is_name_beginner (*e)) |
| 2660 | ++e; |
| 2661 | while (is_part_of_name (*e)) |
| 2662 | ++e; |
| 2663 | |
| 2664 | channels = 0; |
| 2665 | if (!mips_parse_register_1 (s, e, &symval)) |
| 2666 | { |
| 2667 | if (!channels_ptr) |
| 2668 | return FALSE; |
| 2669 | |
| 2670 | /* Eat characters from the end of the string that are valid |
| 2671 | channel suffixes. The preceding register must be $ACC or |
| 2672 | end with a digit, so there is no ambiguity. */ |
| 2673 | bit = 1; |
| 2674 | m = e; |
| 2675 | for (q = "wzyx"; *q; q++, bit <<= 1) |
| 2676 | if (m > s && m[-1] == *q) |
| 2677 | { |
| 2678 | --m; |
| 2679 | channels |= bit; |
| 2680 | } |
| 2681 | |
| 2682 | if (channels == 0 |
| 2683 | || !mips_parse_register_1 (s, m, &symval) |
| 2684 | || (symval & (RTYPE_VI | RTYPE_VF | RTYPE_R5900_ACC)) == 0) |
| 2685 | return FALSE; |
| 2686 | } |
| 2687 | |
| 2688 | *sptr = e; |
| 2689 | *symval_ptr = symval; |
| 2690 | if (channels_ptr) |
| 2691 | *channels_ptr = channels; |
| 2692 | return TRUE; |
| 2693 | } |
| 2694 | |
| 2695 | /* Check if SPTR points at a valid register specifier according to TYPES. |
| 2696 | If so, then return 1, advance S to consume the specifier and store |
| 2697 | the register's number in REGNOP, otherwise return 0. */ |
| 2698 | |
| 2699 | static int |
| 2700 | reg_lookup (char **s, unsigned int types, unsigned int *regnop) |
| 2701 | { |
| 2702 | unsigned int regno; |
| 2703 | |
| 2704 | if (mips_parse_register (s, ®no, NULL)) |
| 2705 | { |
| 2706 | if (types & RTYPE_VEC) |
| 2707 | regno = mips_prefer_vec_regno (regno); |
| 2708 | if (regno & types) |
| 2709 | regno &= RNUM_MASK; |
| 2710 | else |
| 2711 | regno = ~0; |
| 2712 | } |
| 2713 | else |
| 2714 | { |
| 2715 | if (types & RWARN) |
| 2716 | as_warn (_("unrecognized register name `%s'"), *s); |
| 2717 | regno = ~0; |
| 2718 | } |
| 2719 | if (regnop) |
| 2720 | *regnop = regno; |
| 2721 | return regno <= RNUM_MASK; |
| 2722 | } |
| 2723 | |
| 2724 | /* Parse a VU0 "x?y?z?w?" channel mask at S and store the associated |
| 2725 | mask in *CHANNELS. Return a pointer to the first unconsumed character. */ |
| 2726 | |
| 2727 | static char * |
| 2728 | mips_parse_vu0_channels (char *s, unsigned int *channels) |
| 2729 | { |
| 2730 | unsigned int i; |
| 2731 | |
| 2732 | *channels = 0; |
| 2733 | for (i = 0; i < 4; i++) |
| 2734 | if (*s == "xyzw"[i]) |
| 2735 | { |
| 2736 | *channels |= 1 << (3 - i); |
| 2737 | ++s; |
| 2738 | } |
| 2739 | return s; |
| 2740 | } |
| 2741 | |
| 2742 | /* Token types for parsed operand lists. */ |
| 2743 | enum mips_operand_token_type { |
| 2744 | /* A plain register, e.g. $f2. */ |
| 2745 | OT_REG, |
| 2746 | |
| 2747 | /* A 4-bit XYZW channel mask. */ |
| 2748 | OT_CHANNELS, |
| 2749 | |
| 2750 | /* An element of a vector, e.g. $v0[1]. */ |
| 2751 | OT_REG_ELEMENT, |
| 2752 | |
| 2753 | /* A continuous range of registers, e.g. $s0-$s4. */ |
| 2754 | OT_REG_RANGE, |
| 2755 | |
| 2756 | /* A (possibly relocated) expression. */ |
| 2757 | OT_INTEGER, |
| 2758 | |
| 2759 | /* A floating-point value. */ |
| 2760 | OT_FLOAT, |
| 2761 | |
| 2762 | /* A single character. This can be '(', ')' or ',', but '(' only appears |
| 2763 | before OT_REGs. */ |
| 2764 | OT_CHAR, |
| 2765 | |
| 2766 | /* A doubled character, either "--" or "++". */ |
| 2767 | OT_DOUBLE_CHAR, |
| 2768 | |
| 2769 | /* The end of the operand list. */ |
| 2770 | OT_END |
| 2771 | }; |
| 2772 | |
| 2773 | /* A parsed operand token. */ |
| 2774 | struct mips_operand_token |
| 2775 | { |
| 2776 | /* The type of token. */ |
| 2777 | enum mips_operand_token_type type; |
| 2778 | union |
| 2779 | { |
| 2780 | /* The register symbol value for an OT_REG. */ |
| 2781 | unsigned int regno; |
| 2782 | |
| 2783 | /* The 4-bit channel mask for an OT_CHANNEL_SUFFIX. */ |
| 2784 | unsigned int channels; |
| 2785 | |
| 2786 | /* The register symbol value and index for an OT_REG_ELEMENT. */ |
| 2787 | struct { |
| 2788 | unsigned int regno; |
| 2789 | addressT index; |
| 2790 | } reg_element; |
| 2791 | |
| 2792 | /* The two register symbol values involved in an OT_REG_RANGE. */ |
| 2793 | struct { |
| 2794 | unsigned int regno1; |
| 2795 | unsigned int regno2; |
| 2796 | } reg_range; |
| 2797 | |
| 2798 | /* The value of an OT_INTEGER. The value is represented as an |
| 2799 | expression and the relocation operators that were applied to |
| 2800 | that expression. The reloc entries are BFD_RELOC_UNUSED if no |
| 2801 | relocation operators were used. */ |
| 2802 | struct { |
| 2803 | expressionS value; |
| 2804 | bfd_reloc_code_real_type relocs[3]; |
| 2805 | } integer; |
| 2806 | |
| 2807 | /* The binary data for an OT_FLOAT constant, and the number of bytes |
| 2808 | in the constant. */ |
| 2809 | struct { |
| 2810 | unsigned char data[8]; |
| 2811 | int length; |
| 2812 | } flt; |
| 2813 | |
| 2814 | /* The character represented by an OT_CHAR or OT_DOUBLE_CHAR. */ |
| 2815 | char ch; |
| 2816 | } u; |
| 2817 | }; |
| 2818 | |
| 2819 | /* An obstack used to construct lists of mips_operand_tokens. */ |
| 2820 | static struct obstack mips_operand_tokens; |
| 2821 | |
| 2822 | /* Give TOKEN type TYPE and add it to mips_operand_tokens. */ |
| 2823 | |
| 2824 | static void |
| 2825 | mips_add_token (struct mips_operand_token *token, |
| 2826 | enum mips_operand_token_type type) |
| 2827 | { |
| 2828 | token->type = type; |
| 2829 | obstack_grow (&mips_operand_tokens, token, sizeof (*token)); |
| 2830 | } |
| 2831 | |
| 2832 | /* Check whether S is '(' followed by a register name. Add OT_CHAR |
| 2833 | and OT_REG tokens for them if so, and return a pointer to the first |
| 2834 | unconsumed character. Return null otherwise. */ |
| 2835 | |
| 2836 | static char * |
| 2837 | mips_parse_base_start (char *s) |
| 2838 | { |
| 2839 | struct mips_operand_token token; |
| 2840 | unsigned int regno, channels; |
| 2841 | bfd_boolean decrement_p; |
| 2842 | |
| 2843 | if (*s != '(') |
| 2844 | return 0; |
| 2845 | |
| 2846 | ++s; |
| 2847 | SKIP_SPACE_TABS (s); |
| 2848 | |
| 2849 | /* Only match "--" as part of a base expression. In other contexts "--X" |
| 2850 | is a double negative. */ |
| 2851 | decrement_p = (s[0] == '-' && s[1] == '-'); |
| 2852 | if (decrement_p) |
| 2853 | { |
| 2854 | s += 2; |
| 2855 | SKIP_SPACE_TABS (s); |
| 2856 | } |
| 2857 | |
| 2858 | /* Allow a channel specifier because that leads to better error messages |
| 2859 | than treating something like "$vf0x++" as an expression. */ |
| 2860 | if (!mips_parse_register (&s, ®no, &channels)) |
| 2861 | return 0; |
| 2862 | |
| 2863 | token.u.ch = '('; |
| 2864 | mips_add_token (&token, OT_CHAR); |
| 2865 | |
| 2866 | if (decrement_p) |
| 2867 | { |
| 2868 | token.u.ch = '-'; |
| 2869 | mips_add_token (&token, OT_DOUBLE_CHAR); |
| 2870 | } |
| 2871 | |
| 2872 | token.u.regno = regno; |
| 2873 | mips_add_token (&token, OT_REG); |
| 2874 | |
| 2875 | if (channels) |
| 2876 | { |
| 2877 | token.u.channels = channels; |
| 2878 | mips_add_token (&token, OT_CHANNELS); |
| 2879 | } |
| 2880 | |
| 2881 | /* For consistency, only match "++" as part of base expressions too. */ |
| 2882 | SKIP_SPACE_TABS (s); |
| 2883 | if (s[0] == '+' && s[1] == '+') |
| 2884 | { |
| 2885 | s += 2; |
| 2886 | token.u.ch = '+'; |
| 2887 | mips_add_token (&token, OT_DOUBLE_CHAR); |
| 2888 | } |
| 2889 | |
| 2890 | return s; |
| 2891 | } |
| 2892 | |
| 2893 | /* Parse one or more tokens from S. Return a pointer to the first |
| 2894 | unconsumed character on success. Return null if an error was found |
| 2895 | and store the error text in insn_error. FLOAT_FORMAT is as for |
| 2896 | mips_parse_arguments. */ |
| 2897 | |
| 2898 | static char * |
| 2899 | mips_parse_argument_token (char *s, char float_format) |
| 2900 | { |
| 2901 | char *end, *save_in, *err; |
| 2902 | unsigned int regno1, regno2, channels; |
| 2903 | struct mips_operand_token token; |
| 2904 | |
| 2905 | /* First look for "($reg", since we want to treat that as an |
| 2906 | OT_CHAR and OT_REG rather than an expression. */ |
| 2907 | end = mips_parse_base_start (s); |
| 2908 | if (end) |
| 2909 | return end; |
| 2910 | |
| 2911 | /* Handle other characters that end up as OT_CHARs. */ |
| 2912 | if (*s == ')' || *s == ',') |
| 2913 | { |
| 2914 | token.u.ch = *s; |
| 2915 | mips_add_token (&token, OT_CHAR); |
| 2916 | ++s; |
| 2917 | return s; |
| 2918 | } |
| 2919 | |
| 2920 | /* Handle tokens that start with a register. */ |
| 2921 | if (mips_parse_register (&s, ®no1, &channels)) |
| 2922 | { |
| 2923 | if (channels) |
| 2924 | { |
| 2925 | /* A register and a VU0 channel suffix. */ |
| 2926 | token.u.regno = regno1; |
| 2927 | mips_add_token (&token, OT_REG); |
| 2928 | |
| 2929 | token.u.channels = channels; |
| 2930 | mips_add_token (&token, OT_CHANNELS); |
| 2931 | return s; |
| 2932 | } |
| 2933 | |
| 2934 | SKIP_SPACE_TABS (s); |
| 2935 | if (*s == '-') |
| 2936 | { |
| 2937 | /* A register range. */ |
| 2938 | ++s; |
| 2939 | SKIP_SPACE_TABS (s); |
| 2940 | if (!mips_parse_register (&s, ®no2, NULL)) |
| 2941 | { |
| 2942 | set_insn_error (0, _("invalid register range")); |
| 2943 | return 0; |
| 2944 | } |
| 2945 | |
| 2946 | token.u.reg_range.regno1 = regno1; |
| 2947 | token.u.reg_range.regno2 = regno2; |
| 2948 | mips_add_token (&token, OT_REG_RANGE); |
| 2949 | return s; |
| 2950 | } |
| 2951 | else if (*s == '[') |
| 2952 | { |
| 2953 | /* A vector element. */ |
| 2954 | expressionS element; |
| 2955 | |
| 2956 | ++s; |
| 2957 | SKIP_SPACE_TABS (s); |
| 2958 | my_getExpression (&element, s); |
| 2959 | if (element.X_op != O_constant) |
| 2960 | { |
| 2961 | set_insn_error (0, _("vector element must be constant")); |
| 2962 | return 0; |
| 2963 | } |
| 2964 | s = expr_end; |
| 2965 | SKIP_SPACE_TABS (s); |
| 2966 | if (*s != ']') |
| 2967 | { |
| 2968 | set_insn_error (0, _("missing `]'")); |
| 2969 | return 0; |
| 2970 | } |
| 2971 | ++s; |
| 2972 | |
| 2973 | token.u.reg_element.regno = regno1; |
| 2974 | token.u.reg_element.index = element.X_add_number; |
| 2975 | mips_add_token (&token, OT_REG_ELEMENT); |
| 2976 | return s; |
| 2977 | } |
| 2978 | |
| 2979 | /* Looks like just a plain register. */ |
| 2980 | token.u.regno = regno1; |
| 2981 | mips_add_token (&token, OT_REG); |
| 2982 | return s; |
| 2983 | } |
| 2984 | |
| 2985 | if (float_format) |
| 2986 | { |
| 2987 | /* First try to treat expressions as floats. */ |
| 2988 | save_in = input_line_pointer; |
| 2989 | input_line_pointer = s; |
| 2990 | err = md_atof (float_format, (char *) token.u.flt.data, |
| 2991 | &token.u.flt.length); |
| 2992 | end = input_line_pointer; |
| 2993 | input_line_pointer = save_in; |
| 2994 | if (err && *err) |
| 2995 | { |
| 2996 | set_insn_error (0, err); |
| 2997 | return 0; |
| 2998 | } |
| 2999 | if (s != end) |
| 3000 | { |
| 3001 | mips_add_token (&token, OT_FLOAT); |
| 3002 | return end; |
| 3003 | } |
| 3004 | } |
| 3005 | |
| 3006 | /* Treat everything else as an integer expression. */ |
| 3007 | token.u.integer.relocs[0] = BFD_RELOC_UNUSED; |
| 3008 | token.u.integer.relocs[1] = BFD_RELOC_UNUSED; |
| 3009 | token.u.integer.relocs[2] = BFD_RELOC_UNUSED; |
| 3010 | my_getSmallExpression (&token.u.integer.value, token.u.integer.relocs, s); |
| 3011 | s = expr_end; |
| 3012 | mips_add_token (&token, OT_INTEGER); |
| 3013 | return s; |
| 3014 | } |
| 3015 | |
| 3016 | /* S points to the operand list for an instruction. FLOAT_FORMAT is 'f' |
| 3017 | if expressions should be treated as 32-bit floating-point constants, |
| 3018 | 'd' if they should be treated as 64-bit floating-point constants, |
| 3019 | or 0 if they should be treated as integer expressions (the usual case). |
| 3020 | |
| 3021 | Return a list of tokens on success, otherwise return 0. The caller |
| 3022 | must obstack_free the list after use. */ |
| 3023 | |
| 3024 | static struct mips_operand_token * |
| 3025 | mips_parse_arguments (char *s, char float_format) |
| 3026 | { |
| 3027 | struct mips_operand_token token; |
| 3028 | |
| 3029 | SKIP_SPACE_TABS (s); |
| 3030 | while (*s) |
| 3031 | { |
| 3032 | s = mips_parse_argument_token (s, float_format); |
| 3033 | if (!s) |
| 3034 | { |
| 3035 | obstack_free (&mips_operand_tokens, |
| 3036 | obstack_finish (&mips_operand_tokens)); |
| 3037 | return 0; |
| 3038 | } |
| 3039 | SKIP_SPACE_TABS (s); |
| 3040 | } |
| 3041 | mips_add_token (&token, OT_END); |
| 3042 | return (struct mips_operand_token *) obstack_finish (&mips_operand_tokens); |
| 3043 | } |
| 3044 | |
| 3045 | /* Return TRUE if opcode MO is valid on the currently selected ISA, ASE |
| 3046 | and architecture. Use is_opcode_valid_16 for MIPS16 opcodes. */ |
| 3047 | |
| 3048 | static bfd_boolean |
| 3049 | is_opcode_valid (const struct mips_opcode *mo) |
| 3050 | { |
| 3051 | int isa = mips_opts.isa; |
| 3052 | int ase = mips_opts.ase; |
| 3053 | int fp_s, fp_d; |
| 3054 | unsigned int i; |
| 3055 | |
| 3056 | if (ISA_HAS_64BIT_REGS (mips_opts.isa)) |
| 3057 | for (i = 0; i < ARRAY_SIZE (mips_ases); i++) |
| 3058 | if ((ase & mips_ases[i].flags) == mips_ases[i].flags) |
| 3059 | ase |= mips_ases[i].flags64; |
| 3060 | |
| 3061 | if (!opcode_is_member (mo, isa, ase, mips_opts.arch)) |
| 3062 | return FALSE; |
| 3063 | |
| 3064 | /* Check whether the instruction or macro requires single-precision or |
| 3065 | double-precision floating-point support. Note that this information is |
| 3066 | stored differently in the opcode table for insns and macros. */ |
| 3067 | if (mo->pinfo == INSN_MACRO) |
| 3068 | { |
| 3069 | fp_s = mo->pinfo2 & INSN2_M_FP_S; |
| 3070 | fp_d = mo->pinfo2 & INSN2_M_FP_D; |
| 3071 | } |
| 3072 | else |
| 3073 | { |
| 3074 | fp_s = mo->pinfo & FP_S; |
| 3075 | fp_d = mo->pinfo & FP_D; |
| 3076 | } |
| 3077 | |
| 3078 | if (fp_d && (mips_opts.soft_float || mips_opts.single_float)) |
| 3079 | return FALSE; |
| 3080 | |
| 3081 | if (fp_s && mips_opts.soft_float) |
| 3082 | return FALSE; |
| 3083 | |
| 3084 | return TRUE; |
| 3085 | } |
| 3086 | |
| 3087 | /* Return TRUE if the MIPS16 opcode MO is valid on the currently |
| 3088 | selected ISA and architecture. */ |
| 3089 | |
| 3090 | static bfd_boolean |
| 3091 | is_opcode_valid_16 (const struct mips_opcode *mo) |
| 3092 | { |
| 3093 | return opcode_is_member (mo, mips_opts.isa, 0, mips_opts.arch); |
| 3094 | } |
| 3095 | |
| 3096 | /* Return TRUE if the size of the microMIPS opcode MO matches one |
| 3097 | explicitly requested. Always TRUE in the standard MIPS mode. */ |
| 3098 | |
| 3099 | static bfd_boolean |
| 3100 | is_size_valid (const struct mips_opcode *mo) |
| 3101 | { |
| 3102 | if (!mips_opts.micromips) |
| 3103 | return TRUE; |
| 3104 | |
| 3105 | if (mips_opts.insn32) |
| 3106 | { |
| 3107 | if (mo->pinfo != INSN_MACRO && micromips_insn_length (mo) != 4) |
| 3108 | return FALSE; |
| 3109 | if ((mo->pinfo2 & INSN2_BRANCH_DELAY_16BIT) != 0) |
| 3110 | return FALSE; |
| 3111 | } |
| 3112 | if (!forced_insn_length) |
| 3113 | return TRUE; |
| 3114 | if (mo->pinfo == INSN_MACRO) |
| 3115 | return FALSE; |
| 3116 | return forced_insn_length == micromips_insn_length (mo); |
| 3117 | } |
| 3118 | |
| 3119 | /* Return TRUE if the microMIPS opcode MO is valid for the delay slot |
| 3120 | of the preceding instruction. Always TRUE in the standard MIPS mode. |
| 3121 | |
| 3122 | We don't accept macros in 16-bit delay slots to avoid a case where |
| 3123 | a macro expansion fails because it relies on a preceding 32-bit real |
| 3124 | instruction to have matched and does not handle the operands correctly. |
| 3125 | The only macros that may expand to 16-bit instructions are JAL that |
| 3126 | cannot be placed in a delay slot anyway, and corner cases of BALIGN |
| 3127 | and BGT (that likewise cannot be placed in a delay slot) that decay to |
| 3128 | a NOP. In all these cases the macros precede any corresponding real |
| 3129 | instruction definitions in the opcode table, so they will match in the |
| 3130 | second pass where the size of the delay slot is ignored and therefore |
| 3131 | produce correct code. */ |
| 3132 | |
| 3133 | static bfd_boolean |
| 3134 | is_delay_slot_valid (const struct mips_opcode *mo) |
| 3135 | { |
| 3136 | if (!mips_opts.micromips) |
| 3137 | return TRUE; |
| 3138 | |
| 3139 | if (mo->pinfo == INSN_MACRO) |
| 3140 | return (history[0].insn_mo->pinfo2 & INSN2_BRANCH_DELAY_16BIT) == 0; |
| 3141 | if ((history[0].insn_mo->pinfo2 & INSN2_BRANCH_DELAY_32BIT) != 0 |
| 3142 | && micromips_insn_length (mo) != 4) |
| 3143 | return FALSE; |
| 3144 | if ((history[0].insn_mo->pinfo2 & INSN2_BRANCH_DELAY_16BIT) != 0 |
| 3145 | && micromips_insn_length (mo) != 2) |
| 3146 | return FALSE; |
| 3147 | |
| 3148 | return TRUE; |
| 3149 | } |
| 3150 | |
| 3151 | /* For consistency checking, verify that all bits of OPCODE are specified |
| 3152 | either by the match/mask part of the instruction definition, or by the |
| 3153 | operand list. Also build up a list of operands in OPERANDS. |
| 3154 | |
| 3155 | INSN_BITS says which bits of the instruction are significant. |
| 3156 | If OPCODE is a standard or microMIPS instruction, DECODE_OPERAND |
| 3157 | provides the mips_operand description of each operand. DECODE_OPERAND |
| 3158 | is null for MIPS16 instructions. */ |
| 3159 | |
| 3160 | static int |
| 3161 | validate_mips_insn (const struct mips_opcode *opcode, |
| 3162 | unsigned long insn_bits, |
| 3163 | const struct mips_operand *(*decode_operand) (const char *), |
| 3164 | struct mips_operand_array *operands) |
| 3165 | { |
| 3166 | const char *s; |
| 3167 | unsigned long used_bits, doubled, undefined, opno, mask; |
| 3168 | const struct mips_operand *operand; |
| 3169 | |
| 3170 | mask = (opcode->pinfo == INSN_MACRO ? 0 : opcode->mask); |
| 3171 | if ((mask & opcode->match) != opcode->match) |
| 3172 | { |
| 3173 | as_bad (_("internal: bad mips opcode (mask error): %s %s"), |
| 3174 | opcode->name, opcode->args); |
| 3175 | return 0; |
| 3176 | } |
| 3177 | used_bits = 0; |
| 3178 | opno = 0; |
| 3179 | if (opcode->pinfo2 & INSN2_VU0_CHANNEL_SUFFIX) |
| 3180 | used_bits = mips_insert_operand (&mips_vu0_channel_mask, used_bits, -1); |
| 3181 | for (s = opcode->args; *s; ++s) |
| 3182 | switch (*s) |
| 3183 | { |
| 3184 | case ',': |
| 3185 | case '(': |
| 3186 | case ')': |
| 3187 | break; |
| 3188 | |
| 3189 | case '#': |
| 3190 | s++; |
| 3191 | break; |
| 3192 | |
| 3193 | default: |
| 3194 | if (!decode_operand) |
| 3195 | operand = decode_mips16_operand (*s, FALSE); |
| 3196 | else |
| 3197 | operand = decode_operand (s); |
| 3198 | if (!operand && opcode->pinfo != INSN_MACRO) |
| 3199 | { |
| 3200 | as_bad (_("internal: unknown operand type: %s %s"), |
| 3201 | opcode->name, opcode->args); |
| 3202 | return 0; |
| 3203 | } |
| 3204 | gas_assert (opno < MAX_OPERANDS); |
| 3205 | operands->operand[opno] = operand; |
| 3206 | if (operand && operand->type != OP_VU0_MATCH_SUFFIX) |
| 3207 | { |
| 3208 | used_bits = mips_insert_operand (operand, used_bits, -1); |
| 3209 | if (operand->type == OP_MDMX_IMM_REG) |
| 3210 | /* Bit 5 is the format selector (OB vs QH). The opcode table |
| 3211 | has separate entries for each format. */ |
| 3212 | used_bits &= ~(1 << (operand->lsb + 5)); |
| 3213 | if (operand->type == OP_ENTRY_EXIT_LIST) |
| 3214 | used_bits &= ~(mask & 0x700); |
| 3215 | } |
| 3216 | /* Skip prefix characters. */ |
| 3217 | if (decode_operand && (*s == '+' || *s == 'm')) |
| 3218 | ++s; |
| 3219 | opno += 1; |
| 3220 | break; |
| 3221 | } |
| 3222 | doubled = used_bits & mask & insn_bits; |
| 3223 | if (doubled) |
| 3224 | { |
| 3225 | as_bad (_("internal: bad mips opcode (bits 0x%08lx doubly defined):" |
| 3226 | " %s %s"), doubled, opcode->name, opcode->args); |
| 3227 | return 0; |
| 3228 | } |
| 3229 | used_bits |= mask; |
| 3230 | undefined = ~used_bits & insn_bits; |
| 3231 | if (opcode->pinfo != INSN_MACRO && undefined) |
| 3232 | { |
| 3233 | as_bad (_("internal: bad mips opcode (bits 0x%08lx undefined): %s %s"), |
| 3234 | undefined, opcode->name, opcode->args); |
| 3235 | return 0; |
| 3236 | } |
| 3237 | used_bits &= ~insn_bits; |
| 3238 | if (used_bits) |
| 3239 | { |
| 3240 | as_bad (_("internal: bad mips opcode (bits 0x%08lx defined): %s %s"), |
| 3241 | used_bits, opcode->name, opcode->args); |
| 3242 | return 0; |
| 3243 | } |
| 3244 | return 1; |
| 3245 | } |
| 3246 | |
| 3247 | /* The MIPS16 version of validate_mips_insn. */ |
| 3248 | |
| 3249 | static int |
| 3250 | validate_mips16_insn (const struct mips_opcode *opcode, |
| 3251 | struct mips_operand_array *operands) |
| 3252 | { |
| 3253 | if (opcode->args[0] == 'a' || opcode->args[0] == 'i') |
| 3254 | { |
| 3255 | /* In this case OPCODE defines the first 16 bits in a 32-bit jump |
| 3256 | instruction. Use TMP to describe the full instruction. */ |
| 3257 | struct mips_opcode tmp; |
| 3258 | |
| 3259 | tmp = *opcode; |
| 3260 | tmp.match <<= 16; |
| 3261 | tmp.mask <<= 16; |
| 3262 | return validate_mips_insn (&tmp, 0xffffffff, 0, operands); |
| 3263 | } |
| 3264 | return validate_mips_insn (opcode, 0xffff, 0, operands); |
| 3265 | } |
| 3266 | |
| 3267 | /* The microMIPS version of validate_mips_insn. */ |
| 3268 | |
| 3269 | static int |
| 3270 | validate_micromips_insn (const struct mips_opcode *opc, |
| 3271 | struct mips_operand_array *operands) |
| 3272 | { |
| 3273 | unsigned long insn_bits; |
| 3274 | unsigned long major; |
| 3275 | unsigned int length; |
| 3276 | |
| 3277 | if (opc->pinfo == INSN_MACRO) |
| 3278 | return validate_mips_insn (opc, 0xffffffff, decode_micromips_operand, |
| 3279 | operands); |
| 3280 | |
| 3281 | length = micromips_insn_length (opc); |
| 3282 | if (length != 2 && length != 4) |
| 3283 | { |
| 3284 | as_bad (_("internal error: bad microMIPS opcode (incorrect length: %u): " |
| 3285 | "%s %s"), length, opc->name, opc->args); |
| 3286 | return 0; |
| 3287 | } |
| 3288 | major = opc->match >> (10 + 8 * (length - 2)); |
| 3289 | if ((length == 2 && (major & 7) != 1 && (major & 6) != 2) |
| 3290 | || (length == 4 && (major & 7) != 0 && (major & 4) != 4)) |
| 3291 | { |
| 3292 | as_bad (_("internal error: bad microMIPS opcode " |
| 3293 | "(opcode/length mismatch): %s %s"), opc->name, opc->args); |
| 3294 | return 0; |
| 3295 | } |
| 3296 | |
| 3297 | /* Shift piecewise to avoid an overflow where unsigned long is 32-bit. */ |
| 3298 | insn_bits = 1 << 4 * length; |
| 3299 | insn_bits <<= 4 * length; |
| 3300 | insn_bits -= 1; |
| 3301 | return validate_mips_insn (opc, insn_bits, decode_micromips_operand, |
| 3302 | operands); |
| 3303 | } |
| 3304 | |
| 3305 | /* This function is called once, at assembler startup time. It should set up |
| 3306 | all the tables, etc. that the MD part of the assembler will need. */ |
| 3307 | |
| 3308 | void |
| 3309 | md_begin (void) |
| 3310 | { |
| 3311 | const char *retval = NULL; |
| 3312 | int i = 0; |
| 3313 | int broken = 0; |
| 3314 | |
| 3315 | if (mips_pic != NO_PIC) |
| 3316 | { |
| 3317 | if (g_switch_seen && g_switch_value != 0) |
| 3318 | as_bad (_("-G may not be used in position-independent code")); |
| 3319 | g_switch_value = 0; |
| 3320 | } |
| 3321 | |
| 3322 | if (! bfd_set_arch_mach (stdoutput, bfd_arch_mips, file_mips_arch)) |
| 3323 | as_warn (_("could not set architecture and machine")); |
| 3324 | |
| 3325 | op_hash = hash_new (); |
| 3326 | |
| 3327 | mips_operands = XCNEWVEC (struct mips_operand_array, NUMOPCODES); |
| 3328 | for (i = 0; i < NUMOPCODES;) |
| 3329 | { |
| 3330 | const char *name = mips_opcodes[i].name; |
| 3331 | |
| 3332 | retval = hash_insert (op_hash, name, (void *) &mips_opcodes[i]); |
| 3333 | if (retval != NULL) |
| 3334 | { |
| 3335 | fprintf (stderr, _("internal error: can't hash `%s': %s\n"), |
| 3336 | mips_opcodes[i].name, retval); |
| 3337 | /* Probably a memory allocation problem? Give up now. */ |
| 3338 | as_fatal (_("broken assembler, no assembly attempted")); |
| 3339 | } |
| 3340 | do |
| 3341 | { |
| 3342 | if (!validate_mips_insn (&mips_opcodes[i], 0xffffffff, |
| 3343 | decode_mips_operand, &mips_operands[i])) |
| 3344 | broken = 1; |
| 3345 | if (nop_insn.insn_mo == NULL && strcmp (name, "nop") == 0) |
| 3346 | { |
| 3347 | create_insn (&nop_insn, mips_opcodes + i); |
| 3348 | if (mips_fix_loongson2f_nop) |
| 3349 | nop_insn.insn_opcode = LOONGSON2F_NOP_INSN; |
| 3350 | nop_insn.fixed_p = 1; |
| 3351 | } |
| 3352 | ++i; |
| 3353 | } |
| 3354 | while ((i < NUMOPCODES) && !strcmp (mips_opcodes[i].name, name)); |
| 3355 | } |
| 3356 | |
| 3357 | mips16_op_hash = hash_new (); |
| 3358 | mips16_operands = XCNEWVEC (struct mips_operand_array, |
| 3359 | bfd_mips16_num_opcodes); |
| 3360 | |
| 3361 | i = 0; |
| 3362 | while (i < bfd_mips16_num_opcodes) |
| 3363 | { |
| 3364 | const char *name = mips16_opcodes[i].name; |
| 3365 | |
| 3366 | retval = hash_insert (mips16_op_hash, name, (void *) &mips16_opcodes[i]); |
| 3367 | if (retval != NULL) |
| 3368 | as_fatal (_("internal: can't hash `%s': %s"), |
| 3369 | mips16_opcodes[i].name, retval); |
| 3370 | do |
| 3371 | { |
| 3372 | if (!validate_mips16_insn (&mips16_opcodes[i], &mips16_operands[i])) |
| 3373 | broken = 1; |
| 3374 | if (mips16_nop_insn.insn_mo == NULL && strcmp (name, "nop") == 0) |
| 3375 | { |
| 3376 | create_insn (&mips16_nop_insn, mips16_opcodes + i); |
| 3377 | mips16_nop_insn.fixed_p = 1; |
| 3378 | } |
| 3379 | ++i; |
| 3380 | } |
| 3381 | while (i < bfd_mips16_num_opcodes |
| 3382 | && strcmp (mips16_opcodes[i].name, name) == 0); |
| 3383 | } |
| 3384 | |
| 3385 | micromips_op_hash = hash_new (); |
| 3386 | micromips_operands = XCNEWVEC (struct mips_operand_array, |
| 3387 | bfd_micromips_num_opcodes); |
| 3388 | |
| 3389 | i = 0; |
| 3390 | while (i < bfd_micromips_num_opcodes) |
| 3391 | { |
| 3392 | const char *name = micromips_opcodes[i].name; |
| 3393 | |
| 3394 | retval = hash_insert (micromips_op_hash, name, |
| 3395 | (void *) µmips_opcodes[i]); |
| 3396 | if (retval != NULL) |
| 3397 | as_fatal (_("internal: can't hash `%s': %s"), |
| 3398 | micromips_opcodes[i].name, retval); |
| 3399 | do |
| 3400 | { |
| 3401 | struct mips_cl_insn *micromips_nop_insn; |
| 3402 | |
| 3403 | if (!validate_micromips_insn (µmips_opcodes[i], |
| 3404 | µmips_operands[i])) |
| 3405 | broken = 1; |
| 3406 | |
| 3407 | if (micromips_opcodes[i].pinfo != INSN_MACRO) |
| 3408 | { |
| 3409 | if (micromips_insn_length (micromips_opcodes + i) == 2) |
| 3410 | micromips_nop_insn = µmips_nop16_insn; |
| 3411 | else if (micromips_insn_length (micromips_opcodes + i) == 4) |
| 3412 | micromips_nop_insn = µmips_nop32_insn; |
| 3413 | else |
| 3414 | continue; |
| 3415 | |
| 3416 | if (micromips_nop_insn->insn_mo == NULL |
| 3417 | && strcmp (name, "nop") == 0) |
| 3418 | { |
| 3419 | create_insn (micromips_nop_insn, micromips_opcodes + i); |
| 3420 | micromips_nop_insn->fixed_p = 1; |
| 3421 | } |
| 3422 | } |
| 3423 | } |
| 3424 | while (++i < bfd_micromips_num_opcodes |
| 3425 | && strcmp (micromips_opcodes[i].name, name) == 0); |
| 3426 | } |
| 3427 | |
| 3428 | if (broken) |
| 3429 | as_fatal (_("broken assembler, no assembly attempted")); |
| 3430 | |
| 3431 | /* We add all the general register names to the symbol table. This |
| 3432 | helps us detect invalid uses of them. */ |
| 3433 | for (i = 0; reg_names[i].name; i++) |
| 3434 | symbol_table_insert (symbol_new (reg_names[i].name, reg_section, |
| 3435 | reg_names[i].num, /* & RNUM_MASK, */ |
| 3436 | &zero_address_frag)); |
| 3437 | if (HAVE_NEWABI) |
| 3438 | for (i = 0; reg_names_n32n64[i].name; i++) |
| 3439 | symbol_table_insert (symbol_new (reg_names_n32n64[i].name, reg_section, |
| 3440 | reg_names_n32n64[i].num, /* & RNUM_MASK, */ |
| 3441 | &zero_address_frag)); |
| 3442 | else |
| 3443 | for (i = 0; reg_names_o32[i].name; i++) |
| 3444 | symbol_table_insert (symbol_new (reg_names_o32[i].name, reg_section, |
| 3445 | reg_names_o32[i].num, /* & RNUM_MASK, */ |
| 3446 | &zero_address_frag)); |
| 3447 | |
| 3448 | for (i = 0; i < 32; i++) |
| 3449 | { |
| 3450 | char regname[7]; |
| 3451 | |
| 3452 | /* R5900 VU0 floating-point register. */ |
| 3453 | regname[sizeof (rename) - 1] = 0; |
| 3454 | snprintf (regname, sizeof (regname) - 1, "$vf%d", i); |
| 3455 | symbol_table_insert (symbol_new (regname, reg_section, |
| 3456 | RTYPE_VF | i, &zero_address_frag)); |
| 3457 | |
| 3458 | /* R5900 VU0 integer register. */ |
| 3459 | snprintf (regname, sizeof (regname) - 1, "$vi%d", i); |
| 3460 | symbol_table_insert (symbol_new (regname, reg_section, |
| 3461 | RTYPE_VI | i, &zero_address_frag)); |
| 3462 | |
| 3463 | } |
| 3464 | |
| 3465 | obstack_init (&mips_operand_tokens); |
| 3466 | |
| 3467 | mips_no_prev_insn (); |
| 3468 | |
| 3469 | mips_gprmask = 0; |
| 3470 | mips_cprmask[0] = 0; |
| 3471 | mips_cprmask[1] = 0; |
| 3472 | mips_cprmask[2] = 0; |
| 3473 | mips_cprmask[3] = 0; |
| 3474 | |
| 3475 | /* set the default alignment for the text section (2**2) */ |
| 3476 | record_alignment (text_section, 2); |
| 3477 | |
| 3478 | bfd_set_gp_size (stdoutput, g_switch_value); |
| 3479 | |
| 3480 | /* On a native system other than VxWorks, sections must be aligned |
| 3481 | to 16 byte boundaries. When configured for an embedded ELF |
| 3482 | target, we don't bother. */ |
| 3483 | if (strncmp (TARGET_OS, "elf", 3) != 0 |
| 3484 | && strncmp (TARGET_OS, "vxworks", 7) != 0) |
| 3485 | { |
| 3486 | (void) bfd_set_section_alignment (stdoutput, text_section, 4); |
| 3487 | (void) bfd_set_section_alignment (stdoutput, data_section, 4); |
| 3488 | (void) bfd_set_section_alignment (stdoutput, bss_section, 4); |
| 3489 | } |
| 3490 | |
| 3491 | /* Create a .reginfo section for register masks and a .mdebug |
| 3492 | section for debugging information. */ |
| 3493 | { |
| 3494 | segT seg; |
| 3495 | subsegT subseg; |
| 3496 | flagword flags; |
| 3497 | segT sec; |
| 3498 | |
| 3499 | seg = now_seg; |
| 3500 | subseg = now_subseg; |
| 3501 | |
| 3502 | /* The ABI says this section should be loaded so that the |
| 3503 | running program can access it. However, we don't load it |
| 3504 | if we are configured for an embedded target */ |
| 3505 | flags = SEC_READONLY | SEC_DATA; |
| 3506 | if (strncmp (TARGET_OS, "elf", 3) != 0) |
| 3507 | flags |= SEC_ALLOC | SEC_LOAD; |
| 3508 | |
| 3509 | if (mips_abi != N64_ABI) |
| 3510 | { |
| 3511 | sec = subseg_new (".reginfo", (subsegT) 0); |
| 3512 | |
| 3513 | bfd_set_section_flags (stdoutput, sec, flags); |
| 3514 | bfd_set_section_alignment (stdoutput, sec, HAVE_NEWABI ? 3 : 2); |
| 3515 | |
| 3516 | mips_regmask_frag = frag_more (sizeof (Elf32_External_RegInfo)); |
| 3517 | } |
| 3518 | else |
| 3519 | { |
| 3520 | /* The 64-bit ABI uses a .MIPS.options section rather than |
| 3521 | .reginfo section. */ |
| 3522 | sec = subseg_new (".MIPS.options", (subsegT) 0); |
| 3523 | bfd_set_section_flags (stdoutput, sec, flags); |
| 3524 | bfd_set_section_alignment (stdoutput, sec, 3); |
| 3525 | |
| 3526 | /* Set up the option header. */ |
| 3527 | { |
| 3528 | Elf_Internal_Options opthdr; |
| 3529 | char *f; |
| 3530 | |
| 3531 | opthdr.kind = ODK_REGINFO; |
| 3532 | opthdr.size = (sizeof (Elf_External_Options) |
| 3533 | + sizeof (Elf64_External_RegInfo)); |
| 3534 | opthdr.section = 0; |
| 3535 | opthdr.info = 0; |
| 3536 | f = frag_more (sizeof (Elf_External_Options)); |
| 3537 | bfd_mips_elf_swap_options_out (stdoutput, &opthdr, |
| 3538 | (Elf_External_Options *) f); |
| 3539 | |
| 3540 | mips_regmask_frag = frag_more (sizeof (Elf64_External_RegInfo)); |
| 3541 | } |
| 3542 | } |
| 3543 | |
| 3544 | if (ECOFF_DEBUGGING) |
| 3545 | { |
| 3546 | sec = subseg_new (".mdebug", (subsegT) 0); |
| 3547 | (void) bfd_set_section_flags (stdoutput, sec, |
| 3548 | SEC_HAS_CONTENTS | SEC_READONLY); |
| 3549 | (void) bfd_set_section_alignment (stdoutput, sec, 2); |
| 3550 | } |
| 3551 | else if (mips_flag_pdr) |
| 3552 | { |
| 3553 | pdr_seg = subseg_new (".pdr", (subsegT) 0); |
| 3554 | (void) bfd_set_section_flags (stdoutput, pdr_seg, |
| 3555 | SEC_READONLY | SEC_RELOC |
| 3556 | | SEC_DEBUGGING); |
| 3557 | (void) bfd_set_section_alignment (stdoutput, pdr_seg, 2); |
| 3558 | } |
| 3559 | |
| 3560 | subseg_set (seg, subseg); |
| 3561 | } |
| 3562 | |
| 3563 | if (! ECOFF_DEBUGGING) |
| 3564 | md_obj_begin (); |
| 3565 | |
| 3566 | if (mips_fix_vr4120) |
| 3567 | init_vr4120_conflicts (); |
| 3568 | } |
| 3569 | |
| 3570 | void |
| 3571 | md_mips_end (void) |
| 3572 | { |
| 3573 | mips_emit_delays (); |
| 3574 | if (! ECOFF_DEBUGGING) |
| 3575 | md_obj_end (); |
| 3576 | } |
| 3577 | |
| 3578 | void |
| 3579 | md_assemble (char *str) |
| 3580 | { |
| 3581 | struct mips_cl_insn insn; |
| 3582 | bfd_reloc_code_real_type unused_reloc[3] |
| 3583 | = {BFD_RELOC_UNUSED, BFD_RELOC_UNUSED, BFD_RELOC_UNUSED}; |
| 3584 | |
| 3585 | imm_expr.X_op = O_absent; |
| 3586 | offset_expr.X_op = O_absent; |
| 3587 | offset_reloc[0] = BFD_RELOC_UNUSED; |
| 3588 | offset_reloc[1] = BFD_RELOC_UNUSED; |
| 3589 | offset_reloc[2] = BFD_RELOC_UNUSED; |
| 3590 | |
| 3591 | mips_mark_labels (); |
| 3592 | mips_assembling_insn = TRUE; |
| 3593 | clear_insn_error (); |
| 3594 | |
| 3595 | if (mips_opts.mips16) |
| 3596 | mips16_ip (str, &insn); |
| 3597 | else |
| 3598 | { |
| 3599 | mips_ip (str, &insn); |
| 3600 | DBG ((_("returned from mips_ip(%s) insn_opcode = 0x%x\n"), |
| 3601 | str, insn.insn_opcode)); |
| 3602 | } |
| 3603 | |
| 3604 | if (insn_error.msg) |
| 3605 | report_insn_error (str); |
| 3606 | else if (insn.insn_mo->pinfo == INSN_MACRO) |
| 3607 | { |
| 3608 | macro_start (); |
| 3609 | if (mips_opts.mips16) |
| 3610 | mips16_macro (&insn); |
| 3611 | else |
| 3612 | macro (&insn, str); |
| 3613 | macro_end (); |
| 3614 | } |
| 3615 | else |
| 3616 | { |
| 3617 | if (offset_expr.X_op != O_absent) |
| 3618 | append_insn (&insn, &offset_expr, offset_reloc, FALSE); |
| 3619 | else |
| 3620 | append_insn (&insn, NULL, unused_reloc, FALSE); |
| 3621 | } |
| 3622 | |
| 3623 | mips_assembling_insn = FALSE; |
| 3624 | } |
| 3625 | |
| 3626 | /* Convenience functions for abstracting away the differences between |
| 3627 | MIPS16 and non-MIPS16 relocations. */ |
| 3628 | |
| 3629 | static inline bfd_boolean |
| 3630 | mips16_reloc_p (bfd_reloc_code_real_type reloc) |
| 3631 | { |
| 3632 | switch (reloc) |
| 3633 | { |
| 3634 | case BFD_RELOC_MIPS16_JMP: |
| 3635 | case BFD_RELOC_MIPS16_GPREL: |
| 3636 | case BFD_RELOC_MIPS16_GOT16: |
| 3637 | case BFD_RELOC_MIPS16_CALL16: |
| 3638 | case BFD_RELOC_MIPS16_HI16_S: |
| 3639 | case BFD_RELOC_MIPS16_HI16: |
| 3640 | case BFD_RELOC_MIPS16_LO16: |
| 3641 | return TRUE; |
| 3642 | |
| 3643 | default: |
| 3644 | return FALSE; |
| 3645 | } |
| 3646 | } |
| 3647 | |
| 3648 | static inline bfd_boolean |
| 3649 | micromips_reloc_p (bfd_reloc_code_real_type reloc) |
| 3650 | { |
| 3651 | switch (reloc) |
| 3652 | { |
| 3653 | case BFD_RELOC_MICROMIPS_7_PCREL_S1: |
| 3654 | case BFD_RELOC_MICROMIPS_10_PCREL_S1: |
| 3655 | case BFD_RELOC_MICROMIPS_16_PCREL_S1: |
| 3656 | case BFD_RELOC_MICROMIPS_GPREL16: |
| 3657 | case BFD_RELOC_MICROMIPS_JMP: |
| 3658 | case BFD_RELOC_MICROMIPS_HI16: |
| 3659 | case BFD_RELOC_MICROMIPS_HI16_S: |
| 3660 | case BFD_RELOC_MICROMIPS_LO16: |
| 3661 | case BFD_RELOC_MICROMIPS_LITERAL: |
| 3662 | case BFD_RELOC_MICROMIPS_GOT16: |
| 3663 | case BFD_RELOC_MICROMIPS_CALL16: |
| 3664 | case BFD_RELOC_MICROMIPS_GOT_HI16: |
| 3665 | case BFD_RELOC_MICROMIPS_GOT_LO16: |
| 3666 | case BFD_RELOC_MICROMIPS_CALL_HI16: |
| 3667 | case BFD_RELOC_MICROMIPS_CALL_LO16: |
| 3668 | case BFD_RELOC_MICROMIPS_SUB: |
| 3669 | case BFD_RELOC_MICROMIPS_GOT_PAGE: |
| 3670 | case BFD_RELOC_MICROMIPS_GOT_OFST: |
| 3671 | case BFD_RELOC_MICROMIPS_GOT_DISP: |
| 3672 | case BFD_RELOC_MICROMIPS_HIGHEST: |
| 3673 | case BFD_RELOC_MICROMIPS_HIGHER: |
| 3674 | case BFD_RELOC_MICROMIPS_SCN_DISP: |
| 3675 | case BFD_RELOC_MICROMIPS_JALR: |
| 3676 | return TRUE; |
| 3677 | |
| 3678 | default: |
| 3679 | return FALSE; |
| 3680 | } |
| 3681 | } |
| 3682 | |
| 3683 | static inline bfd_boolean |
| 3684 | jmp_reloc_p (bfd_reloc_code_real_type reloc) |
| 3685 | { |
| 3686 | return reloc == BFD_RELOC_MIPS_JMP || reloc == BFD_RELOC_MICROMIPS_JMP; |
| 3687 | } |
| 3688 | |
| 3689 | static inline bfd_boolean |
| 3690 | got16_reloc_p (bfd_reloc_code_real_type reloc) |
| 3691 | { |
| 3692 | return (reloc == BFD_RELOC_MIPS_GOT16 || reloc == BFD_RELOC_MIPS16_GOT16 |
| 3693 | || reloc == BFD_RELOC_MICROMIPS_GOT16); |
| 3694 | } |
| 3695 | |
| 3696 | static inline bfd_boolean |
| 3697 | hi16_reloc_p (bfd_reloc_code_real_type reloc) |
| 3698 | { |
| 3699 | return (reloc == BFD_RELOC_HI16_S || reloc == BFD_RELOC_MIPS16_HI16_S |
| 3700 | || reloc == BFD_RELOC_MICROMIPS_HI16_S); |
| 3701 | } |
| 3702 | |
| 3703 | static inline bfd_boolean |
| 3704 | lo16_reloc_p (bfd_reloc_code_real_type reloc) |
| 3705 | { |
| 3706 | return (reloc == BFD_RELOC_LO16 || reloc == BFD_RELOC_MIPS16_LO16 |
| 3707 | || reloc == BFD_RELOC_MICROMIPS_LO16); |
| 3708 | } |
| 3709 | |
| 3710 | static inline bfd_boolean |
| 3711 | jalr_reloc_p (bfd_reloc_code_real_type reloc) |
| 3712 | { |
| 3713 | return reloc == BFD_RELOC_MIPS_JALR || reloc == BFD_RELOC_MICROMIPS_JALR; |
| 3714 | } |
| 3715 | |
| 3716 | static inline bfd_boolean |
| 3717 | gprel16_reloc_p (bfd_reloc_code_real_type reloc) |
| 3718 | { |
| 3719 | return (reloc == BFD_RELOC_GPREL16 || reloc == BFD_RELOC_MIPS16_GPREL |
| 3720 | || reloc == BFD_RELOC_MICROMIPS_GPREL16); |
| 3721 | } |
| 3722 | |
| 3723 | /* Return true if RELOC is a PC-relative relocation that does not have |
| 3724 | full address range. */ |
| 3725 | |
| 3726 | static inline bfd_boolean |
| 3727 | limited_pcrel_reloc_p (bfd_reloc_code_real_type reloc) |
| 3728 | { |
| 3729 | switch (reloc) |
| 3730 | { |
| 3731 | case BFD_RELOC_16_PCREL_S2: |
| 3732 | case BFD_RELOC_MICROMIPS_7_PCREL_S1: |
| 3733 | case BFD_RELOC_MICROMIPS_10_PCREL_S1: |
| 3734 | case BFD_RELOC_MICROMIPS_16_PCREL_S1: |
| 3735 | return TRUE; |
| 3736 | |
| 3737 | case BFD_RELOC_32_PCREL: |
| 3738 | return HAVE_64BIT_ADDRESSES; |
| 3739 | |
| 3740 | default: |
| 3741 | return FALSE; |
| 3742 | } |
| 3743 | } |
| 3744 | |
| 3745 | /* Return true if the given relocation might need a matching %lo(). |
| 3746 | This is only "might" because SVR4 R_MIPS_GOT16 relocations only |
| 3747 | need a matching %lo() when applied to local symbols. */ |
| 3748 | |
| 3749 | static inline bfd_boolean |
| 3750 | reloc_needs_lo_p (bfd_reloc_code_real_type reloc) |
| 3751 | { |
| 3752 | return (HAVE_IN_PLACE_ADDENDS |
| 3753 | && (hi16_reloc_p (reloc) |
| 3754 | /* VxWorks R_MIPS_GOT16 relocs never need a matching %lo(); |
| 3755 | all GOT16 relocations evaluate to "G". */ |
| 3756 | || (got16_reloc_p (reloc) && mips_pic != VXWORKS_PIC))); |
| 3757 | } |
| 3758 | |
| 3759 | /* Return the type of %lo() reloc needed by RELOC, given that |
| 3760 | reloc_needs_lo_p. */ |
| 3761 | |
| 3762 | static inline bfd_reloc_code_real_type |
| 3763 | matching_lo_reloc (bfd_reloc_code_real_type reloc) |
| 3764 | { |
| 3765 | return (mips16_reloc_p (reloc) ? BFD_RELOC_MIPS16_LO16 |
| 3766 | : (micromips_reloc_p (reloc) ? BFD_RELOC_MICROMIPS_LO16 |
| 3767 | : BFD_RELOC_LO16)); |
| 3768 | } |
| 3769 | |
| 3770 | /* Return true if the given fixup is followed by a matching R_MIPS_LO16 |
| 3771 | relocation. */ |
| 3772 | |
| 3773 | static inline bfd_boolean |
| 3774 | fixup_has_matching_lo_p (fixS *fixp) |
| 3775 | { |
| 3776 | return (fixp->fx_next != NULL |
| 3777 | && fixp->fx_next->fx_r_type == matching_lo_reloc (fixp->fx_r_type) |
| 3778 | && fixp->fx_addsy == fixp->fx_next->fx_addsy |
| 3779 | && fixp->fx_offset == fixp->fx_next->fx_offset); |
| 3780 | } |
| 3781 | |
| 3782 | /* Move all labels in LABELS to the current insertion point. TEXT_P |
| 3783 | says whether the labels refer to text or data. */ |
| 3784 | |
| 3785 | static void |
| 3786 | mips_move_labels (struct insn_label_list *labels, bfd_boolean text_p) |
| 3787 | { |
| 3788 | struct insn_label_list *l; |
| 3789 | valueT val; |
| 3790 | |
| 3791 | for (l = labels; l != NULL; l = l->next) |
| 3792 | { |
| 3793 | gas_assert (S_GET_SEGMENT (l->label) == now_seg); |
| 3794 | symbol_set_frag (l->label, frag_now); |
| 3795 | val = (valueT) frag_now_fix (); |
| 3796 | /* MIPS16/microMIPS text labels are stored as odd. */ |
| 3797 | if (text_p && HAVE_CODE_COMPRESSION) |
| 3798 | ++val; |
| 3799 | S_SET_VALUE (l->label, val); |
| 3800 | } |
| 3801 | } |
| 3802 | |
| 3803 | /* Move all labels in insn_labels to the current insertion point |
| 3804 | and treat them as text labels. */ |
| 3805 | |
| 3806 | static void |
| 3807 | mips_move_text_labels (void) |
| 3808 | { |
| 3809 | mips_move_labels (seg_info (now_seg)->label_list, TRUE); |
| 3810 | } |
| 3811 | |
| 3812 | static bfd_boolean |
| 3813 | s_is_linkonce (symbolS *sym, segT from_seg) |
| 3814 | { |
| 3815 | bfd_boolean linkonce = FALSE; |
| 3816 | segT symseg = S_GET_SEGMENT (sym); |
| 3817 | |
| 3818 | if (symseg != from_seg && !S_IS_LOCAL (sym)) |
| 3819 | { |
| 3820 | if ((bfd_get_section_flags (stdoutput, symseg) & SEC_LINK_ONCE)) |
| 3821 | linkonce = TRUE; |
| 3822 | /* The GNU toolchain uses an extension for ELF: a section |
| 3823 | beginning with the magic string .gnu.linkonce is a |
| 3824 | linkonce section. */ |
| 3825 | if (strncmp (segment_name (symseg), ".gnu.linkonce", |
| 3826 | sizeof ".gnu.linkonce" - 1) == 0) |
| 3827 | linkonce = TRUE; |
| 3828 | } |
| 3829 | return linkonce; |
| 3830 | } |
| 3831 | |
| 3832 | /* Mark MIPS16 or microMIPS instruction label LABEL. This permits the |
| 3833 | linker to handle them specially, such as generating jalx instructions |
| 3834 | when needed. We also make them odd for the duration of the assembly, |
| 3835 | in order to generate the right sort of code. We will make them even |
| 3836 | in the adjust_symtab routine, while leaving them marked. This is |
| 3837 | convenient for the debugger and the disassembler. The linker knows |
| 3838 | to make them odd again. */ |
| 3839 | |
| 3840 | static void |
| 3841 | mips_compressed_mark_label (symbolS *label) |
| 3842 | { |
| 3843 | gas_assert (HAVE_CODE_COMPRESSION); |
| 3844 | |
| 3845 | if (mips_opts.mips16) |
| 3846 | S_SET_OTHER (label, ELF_ST_SET_MIPS16 (S_GET_OTHER (label))); |
| 3847 | else |
| 3848 | S_SET_OTHER (label, ELF_ST_SET_MICROMIPS (S_GET_OTHER (label))); |
| 3849 | if ((S_GET_VALUE (label) & 1) == 0 |
| 3850 | /* Don't adjust the address if the label is global or weak, or |
| 3851 | in a link-once section, since we'll be emitting symbol reloc |
| 3852 | references to it which will be patched up by the linker, and |
| 3853 | the final value of the symbol may or may not be MIPS16/microMIPS. */ |
| 3854 | && !S_IS_WEAK (label) |
| 3855 | && !S_IS_EXTERNAL (label) |
| 3856 | && !s_is_linkonce (label, now_seg)) |
| 3857 | S_SET_VALUE (label, S_GET_VALUE (label) | 1); |
| 3858 | } |
| 3859 | |
| 3860 | /* Mark preceding MIPS16 or microMIPS instruction labels. */ |
| 3861 | |
| 3862 | static void |
| 3863 | mips_compressed_mark_labels (void) |
| 3864 | { |
| 3865 | struct insn_label_list *l; |
| 3866 | |
| 3867 | for (l = seg_info (now_seg)->label_list; l != NULL; l = l->next) |
| 3868 | mips_compressed_mark_label (l->label); |
| 3869 | } |
| 3870 | |
| 3871 | /* End the current frag. Make it a variant frag and record the |
| 3872 | relaxation info. */ |
| 3873 | |
| 3874 | static void |
| 3875 | relax_close_frag (void) |
| 3876 | { |
| 3877 | mips_macro_warning.first_frag = frag_now; |
| 3878 | frag_var (rs_machine_dependent, 0, 0, |
| 3879 | RELAX_ENCODE (mips_relax.sizes[0], mips_relax.sizes[1]), |
| 3880 | mips_relax.symbol, 0, (char *) mips_relax.first_fixup); |
| 3881 | |
| 3882 | memset (&mips_relax.sizes, 0, sizeof (mips_relax.sizes)); |
| 3883 | mips_relax.first_fixup = 0; |
| 3884 | } |
| 3885 | |
| 3886 | /* Start a new relaxation sequence whose expansion depends on SYMBOL. |
| 3887 | See the comment above RELAX_ENCODE for more details. */ |
| 3888 | |
| 3889 | static void |
| 3890 | relax_start (symbolS *symbol) |
| 3891 | { |
| 3892 | gas_assert (mips_relax.sequence == 0); |
| 3893 | mips_relax.sequence = 1; |
| 3894 | mips_relax.symbol = symbol; |
| 3895 | } |
| 3896 | |
| 3897 | /* Start generating the second version of a relaxable sequence. |
| 3898 | See the comment above RELAX_ENCODE for more details. */ |
| 3899 | |
| 3900 | static void |
| 3901 | relax_switch (void) |
| 3902 | { |
| 3903 | gas_assert (mips_relax.sequence == 1); |
| 3904 | mips_relax.sequence = 2; |
| 3905 | } |
| 3906 | |
| 3907 | /* End the current relaxable sequence. */ |
| 3908 | |
| 3909 | static void |
| 3910 | relax_end (void) |
| 3911 | { |
| 3912 | gas_assert (mips_relax.sequence == 2); |
| 3913 | relax_close_frag (); |
| 3914 | mips_relax.sequence = 0; |
| 3915 | } |
| 3916 | |
| 3917 | /* Return true if IP is a delayed branch or jump. */ |
| 3918 | |
| 3919 | static inline bfd_boolean |
| 3920 | delayed_branch_p (const struct mips_cl_insn *ip) |
| 3921 | { |
| 3922 | return (ip->insn_mo->pinfo & (INSN_UNCOND_BRANCH_DELAY |
| 3923 | | INSN_COND_BRANCH_DELAY |
| 3924 | | INSN_COND_BRANCH_LIKELY)) != 0; |
| 3925 | } |
| 3926 | |
| 3927 | /* Return true if IP is a compact branch or jump. */ |
| 3928 | |
| 3929 | static inline bfd_boolean |
| 3930 | compact_branch_p (const struct mips_cl_insn *ip) |
| 3931 | { |
| 3932 | return (ip->insn_mo->pinfo2 & (INSN2_UNCOND_BRANCH |
| 3933 | | INSN2_COND_BRANCH)) != 0; |
| 3934 | } |
| 3935 | |
| 3936 | /* Return true if IP is an unconditional branch or jump. */ |
| 3937 | |
| 3938 | static inline bfd_boolean |
| 3939 | uncond_branch_p (const struct mips_cl_insn *ip) |
| 3940 | { |
| 3941 | return ((ip->insn_mo->pinfo & INSN_UNCOND_BRANCH_DELAY) != 0 |
| 3942 | || (ip->insn_mo->pinfo2 & INSN2_UNCOND_BRANCH) != 0); |
| 3943 | } |
| 3944 | |
| 3945 | /* Return true if IP is a branch-likely instruction. */ |
| 3946 | |
| 3947 | static inline bfd_boolean |
| 3948 | branch_likely_p (const struct mips_cl_insn *ip) |
| 3949 | { |
| 3950 | return (ip->insn_mo->pinfo & INSN_COND_BRANCH_LIKELY) != 0; |
| 3951 | } |
| 3952 | |
| 3953 | /* Return the type of nop that should be used to fill the delay slot |
| 3954 | of delayed branch IP. */ |
| 3955 | |
| 3956 | static struct mips_cl_insn * |
| 3957 | get_delay_slot_nop (const struct mips_cl_insn *ip) |
| 3958 | { |
| 3959 | if (mips_opts.micromips |
| 3960 | && (ip->insn_mo->pinfo2 & INSN2_BRANCH_DELAY_32BIT)) |
| 3961 | return µmips_nop32_insn; |
| 3962 | return NOP_INSN; |
| 3963 | } |
| 3964 | |
| 3965 | /* Return a mask that has bit N set if OPCODE reads the register(s) |
| 3966 | in operand N. */ |
| 3967 | |
| 3968 | static unsigned int |
| 3969 | insn_read_mask (const struct mips_opcode *opcode) |
| 3970 | { |
| 3971 | return (opcode->pinfo & INSN_READ_ALL) >> INSN_READ_SHIFT; |
| 3972 | } |
| 3973 | |
| 3974 | /* Return a mask that has bit N set if OPCODE writes to the register(s) |
| 3975 | in operand N. */ |
| 3976 | |
| 3977 | static unsigned int |
| 3978 | insn_write_mask (const struct mips_opcode *opcode) |
| 3979 | { |
| 3980 | return (opcode->pinfo & INSN_WRITE_ALL) >> INSN_WRITE_SHIFT; |
| 3981 | } |
| 3982 | |
| 3983 | /* Return a mask of the registers specified by operand OPERAND of INSN. |
| 3984 | Ignore registers of type OP_REG_<t> unless bit OP_REG_<t> of TYPE_MASK |
| 3985 | is set. */ |
| 3986 | |
| 3987 | static unsigned int |
| 3988 | operand_reg_mask (const struct mips_cl_insn *insn, |
| 3989 | const struct mips_operand *operand, |
| 3990 | unsigned int type_mask) |
| 3991 | { |
| 3992 | unsigned int uval, vsel; |
| 3993 | |
| 3994 | switch (operand->type) |
| 3995 | { |
| 3996 | case OP_INT: |
| 3997 | case OP_MAPPED_INT: |
| 3998 | case OP_MSB: |
| 3999 | case OP_PCREL: |
| 4000 | case OP_PERF_REG: |
| 4001 | case OP_ADDIUSP_INT: |
| 4002 | case OP_ENTRY_EXIT_LIST: |
| 4003 | case OP_REPEAT_DEST_REG: |
| 4004 | case OP_REPEAT_PREV_REG: |
| 4005 | case OP_PC: |
| 4006 | case OP_VU0_SUFFIX: |
| 4007 | case OP_VU0_MATCH_SUFFIX: |
| 4008 | abort (); |
| 4009 | |
| 4010 | case OP_REG: |
| 4011 | case OP_OPTIONAL_REG: |
| 4012 | { |
| 4013 | const struct mips_reg_operand *reg_op; |
| 4014 | |
| 4015 | reg_op = (const struct mips_reg_operand *) operand; |
| 4016 | if (!(type_mask & (1 << reg_op->reg_type))) |
| 4017 | return 0; |
| 4018 | uval = insn_extract_operand (insn, operand); |
| 4019 | return 1 << mips_decode_reg_operand (reg_op, uval); |
| 4020 | } |
| 4021 | |
| 4022 | case OP_REG_PAIR: |
| 4023 | { |
| 4024 | const struct mips_reg_pair_operand *pair_op; |
| 4025 | |
| 4026 | pair_op = (const struct mips_reg_pair_operand *) operand; |
| 4027 | if (!(type_mask & (1 << pair_op->reg_type))) |
| 4028 | return 0; |
| 4029 | uval = insn_extract_operand (insn, operand); |
| 4030 | return (1 << pair_op->reg1_map[uval]) | (1 << pair_op->reg2_map[uval]); |
| 4031 | } |
| 4032 | |
| 4033 | case OP_CLO_CLZ_DEST: |
| 4034 | if (!(type_mask & (1 << OP_REG_GP))) |
| 4035 | return 0; |
| 4036 | uval = insn_extract_operand (insn, operand); |
| 4037 | return (1 << (uval & 31)) | (1 << (uval >> 5)); |
| 4038 | |
| 4039 | case OP_LWM_SWM_LIST: |
| 4040 | abort (); |
| 4041 | |
| 4042 | case OP_SAVE_RESTORE_LIST: |
| 4043 | abort (); |
| 4044 | |
| 4045 | case OP_MDMX_IMM_REG: |
| 4046 | if (!(type_mask & (1 << OP_REG_VEC))) |
| 4047 | return 0; |
| 4048 | uval = insn_extract_operand (insn, operand); |
| 4049 | vsel = uval >> 5; |
| 4050 | if ((vsel & 0x18) == 0x18) |
| 4051 | return 0; |
| 4052 | return 1 << (uval & 31); |
| 4053 | } |
| 4054 | abort (); |
| 4055 | } |
| 4056 | |
| 4057 | /* Return a mask of the registers specified by operands OPNO_MASK of INSN, |
| 4058 | where bit N of OPNO_MASK is set if operand N should be included. |
| 4059 | Ignore registers of type OP_REG_<t> unless bit OP_REG_<t> of TYPE_MASK |
| 4060 | is set. */ |
| 4061 | |
| 4062 | static unsigned int |
| 4063 | insn_reg_mask (const struct mips_cl_insn *insn, |
| 4064 | unsigned int type_mask, unsigned int opno_mask) |
| 4065 | { |
| 4066 | unsigned int opno, reg_mask; |
| 4067 | |
| 4068 | opno = 0; |
| 4069 | reg_mask = 0; |
| 4070 | while (opno_mask != 0) |
| 4071 | { |
| 4072 | if (opno_mask & 1) |
| 4073 | reg_mask |= operand_reg_mask (insn, insn_opno (insn, opno), type_mask); |
| 4074 | opno_mask >>= 1; |
| 4075 | opno += 1; |
| 4076 | } |
| 4077 | return reg_mask; |
| 4078 | } |
| 4079 | |
| 4080 | /* Return the mask of core registers that IP reads. */ |
| 4081 | |
| 4082 | static unsigned int |
| 4083 | gpr_read_mask (const struct mips_cl_insn *ip) |
| 4084 | { |
| 4085 | unsigned long pinfo, pinfo2; |
| 4086 | unsigned int mask; |
| 4087 | |
| 4088 | mask = insn_reg_mask (ip, 1 << OP_REG_GP, insn_read_mask (ip->insn_mo)); |
| 4089 | pinfo = ip->insn_mo->pinfo; |
| 4090 | pinfo2 = ip->insn_mo->pinfo2; |
| 4091 | if (pinfo & INSN_UDI) |
| 4092 | { |
| 4093 | /* UDI instructions have traditionally been assumed to read RS |
| 4094 | and RT. */ |
| 4095 | mask |= 1 << EXTRACT_OPERAND (mips_opts.micromips, RT, *ip); |
| 4096 | mask |= 1 << EXTRACT_OPERAND (mips_opts.micromips, RS, *ip); |
| 4097 | } |
| 4098 | if (pinfo & INSN_READ_GPR_24) |
| 4099 | mask |= 1 << 24; |
| 4100 | if (pinfo2 & INSN2_READ_GPR_16) |
| 4101 | mask |= 1 << 16; |
| 4102 | if (pinfo2 & INSN2_READ_SP) |
| 4103 | mask |= 1 << SP; |
| 4104 | if (pinfo2 & INSN2_READ_GPR_31) |
| 4105 | mask |= 1 << 31; |
| 4106 | /* Don't include register 0. */ |
| 4107 | return mask & ~1; |
| 4108 | } |
| 4109 | |
| 4110 | /* Return the mask of core registers that IP writes. */ |
| 4111 | |
| 4112 | static unsigned int |
| 4113 | gpr_write_mask (const struct mips_cl_insn *ip) |
| 4114 | { |
| 4115 | unsigned long pinfo, pinfo2; |
| 4116 | unsigned int mask; |
| 4117 | |
| 4118 | mask = insn_reg_mask (ip, 1 << OP_REG_GP, insn_write_mask (ip->insn_mo)); |
| 4119 | pinfo = ip->insn_mo->pinfo; |
| 4120 | pinfo2 = ip->insn_mo->pinfo2; |
| 4121 | if (pinfo & INSN_WRITE_GPR_24) |
| 4122 | mask |= 1 << 24; |
| 4123 | if (pinfo & INSN_WRITE_GPR_31) |
| 4124 | mask |= 1 << 31; |
| 4125 | if (pinfo & INSN_UDI) |
| 4126 | /* UDI instructions have traditionally been assumed to write to RD. */ |
| 4127 | mask |= 1 << EXTRACT_OPERAND (mips_opts.micromips, RD, *ip); |
| 4128 | if (pinfo2 & INSN2_WRITE_SP) |
| 4129 | mask |= 1 << SP; |
| 4130 | /* Don't include register 0. */ |
| 4131 | return mask & ~1; |
| 4132 | } |
| 4133 | |
| 4134 | /* Return the mask of floating-point registers that IP reads. */ |
| 4135 | |
| 4136 | static unsigned int |
| 4137 | fpr_read_mask (const struct mips_cl_insn *ip) |
| 4138 | { |
| 4139 | unsigned long pinfo; |
| 4140 | unsigned int mask; |
| 4141 | |
| 4142 | mask = insn_reg_mask (ip, (1 << OP_REG_FP) | (1 << OP_REG_VEC), |
| 4143 | insn_read_mask (ip->insn_mo)); |
| 4144 | pinfo = ip->insn_mo->pinfo; |
| 4145 | /* Conservatively treat all operands to an FP_D instruction are doubles. |
| 4146 | (This is overly pessimistic for things like cvt.d.s.) */ |
| 4147 | if (HAVE_32BIT_FPRS && (pinfo & FP_D)) |
| 4148 | mask |= mask << 1; |
| 4149 | return mask; |
| 4150 | } |
| 4151 | |
| 4152 | /* Return the mask of floating-point registers that IP writes. */ |
| 4153 | |
| 4154 | static unsigned int |
| 4155 | fpr_write_mask (const struct mips_cl_insn *ip) |
| 4156 | { |
| 4157 | unsigned long pinfo; |
| 4158 | unsigned int mask; |
| 4159 | |
| 4160 | mask = insn_reg_mask (ip, (1 << OP_REG_FP) | (1 << OP_REG_VEC), |
| 4161 | insn_write_mask (ip->insn_mo)); |
| 4162 | pinfo = ip->insn_mo->pinfo; |
| 4163 | /* Conservatively treat all operands to an FP_D instruction are doubles. |
| 4164 | (This is overly pessimistic for things like cvt.s.d.) */ |
| 4165 | if (HAVE_32BIT_FPRS && (pinfo & FP_D)) |
| 4166 | mask |= mask << 1; |
| 4167 | return mask; |
| 4168 | } |
| 4169 | |
| 4170 | /* Operand OPNUM of INSN is an odd-numbered floating-point register. |
| 4171 | Check whether that is allowed. */ |
| 4172 | |
| 4173 | static bfd_boolean |
| 4174 | mips_oddfpreg_ok (const struct mips_opcode *insn, int opnum) |
| 4175 | { |
| 4176 | const char *s = insn->name; |
| 4177 | |
| 4178 | if (insn->pinfo == INSN_MACRO) |
| 4179 | /* Let a macro pass, we'll catch it later when it is expanded. */ |
| 4180 | return TRUE; |
| 4181 | |
| 4182 | if (ISA_HAS_ODD_SINGLE_FPR (mips_opts.isa) || mips_opts.arch == CPU_R5900) |
| 4183 | { |
| 4184 | /* Allow odd registers for single-precision ops. */ |
| 4185 | switch (insn->pinfo & (FP_S | FP_D)) |
| 4186 | { |
| 4187 | case FP_S: |
| 4188 | case 0: |
| 4189 | return TRUE; |
| 4190 | case FP_D: |
| 4191 | return FALSE; |
| 4192 | default: |
| 4193 | break; |
| 4194 | } |
| 4195 | |
| 4196 | /* Cvt.w.x and cvt.x.w allow an odd register for a 'w' or 's' operand. */ |
| 4197 | s = strchr (insn->name, '.'); |
| 4198 | if (s != NULL && opnum == 2) |
| 4199 | s = strchr (s + 1, '.'); |
| 4200 | return (s != NULL && (s[1] == 'w' || s[1] == 's')); |
| 4201 | } |
| 4202 | |
| 4203 | /* Single-precision coprocessor loads and moves are OK too. */ |
| 4204 | if ((insn->pinfo & FP_S) |
| 4205 | && (insn->pinfo & (INSN_COPROC_MEMORY_DELAY | INSN_STORE_MEMORY |
| 4206 | | INSN_LOAD_COPROC_DELAY | INSN_COPROC_MOVE_DELAY))) |
| 4207 | return TRUE; |
| 4208 | |
| 4209 | return FALSE; |
| 4210 | } |
| 4211 | |
| 4212 | /* Information about an instruction argument that we're trying to match. */ |
| 4213 | struct mips_arg_info |
| 4214 | { |
| 4215 | /* The instruction so far. */ |
| 4216 | struct mips_cl_insn *insn; |
| 4217 | |
| 4218 | /* The first unconsumed operand token. */ |
| 4219 | struct mips_operand_token *token; |
| 4220 | |
| 4221 | /* The 1-based operand number, in terms of insn->insn_mo->args. */ |
| 4222 | int opnum; |
| 4223 | |
| 4224 | /* The 1-based argument number, for error reporting. This does not |
| 4225 | count elided optional registers, etc.. */ |
| 4226 | int argnum; |
| 4227 | |
| 4228 | /* The last OP_REG operand seen, or ILLEGAL_REG if none. */ |
| 4229 | unsigned int last_regno; |
| 4230 | |
| 4231 | /* If the first operand was an OP_REG, this is the register that it |
| 4232 | specified, otherwise it is ILLEGAL_REG. */ |
| 4233 | unsigned int dest_regno; |
| 4234 | |
| 4235 | /* The value of the last OP_INT operand. Only used for OP_MSB, |
| 4236 | where it gives the lsb position. */ |
| 4237 | unsigned int last_op_int; |
| 4238 | |
| 4239 | /* If true, match routines should assume that no later instruction |
| 4240 | alternative matches and should therefore be as accomodating as |
| 4241 | possible. Match routines should not report errors if something |
| 4242 | is only invalid for !LAX_MATCH. */ |
| 4243 | bfd_boolean lax_match; |
| 4244 | |
| 4245 | /* True if a reference to the current AT register was seen. */ |
| 4246 | bfd_boolean seen_at; |
| 4247 | }; |
| 4248 | |
| 4249 | /* Record that the argument is out of range. */ |
| 4250 | |
| 4251 | static void |
| 4252 | match_out_of_range (struct mips_arg_info *arg) |
| 4253 | { |
| 4254 | set_insn_error_i (arg->argnum, _("operand %d out of range"), arg->argnum); |
| 4255 | } |
| 4256 | |
| 4257 | /* Record that the argument isn't constant but needs to be. */ |
| 4258 | |
| 4259 | static void |
| 4260 | match_not_constant (struct mips_arg_info *arg) |
| 4261 | { |
| 4262 | set_insn_error_i (arg->argnum, _("operand %d must be constant"), |
| 4263 | arg->argnum); |
| 4264 | } |
| 4265 | |
| 4266 | /* Try to match an OT_CHAR token for character CH. Consume the token |
| 4267 | and return true on success, otherwise return false. */ |
| 4268 | |
| 4269 | static bfd_boolean |
| 4270 | match_char (struct mips_arg_info *arg, char ch) |
| 4271 | { |
| 4272 | if (arg->token->type == OT_CHAR && arg->token->u.ch == ch) |
| 4273 | { |
| 4274 | ++arg->token; |
| 4275 | if (ch == ',') |
| 4276 | arg->argnum += 1; |
| 4277 | return TRUE; |
| 4278 | } |
| 4279 | return FALSE; |
| 4280 | } |
| 4281 | |
| 4282 | /* Try to get an expression from the next tokens in ARG. Consume the |
| 4283 | tokens and return true on success, storing the expression value in |
| 4284 | VALUE and relocation types in R. */ |
| 4285 | |
| 4286 | static bfd_boolean |
| 4287 | match_expression (struct mips_arg_info *arg, expressionS *value, |
| 4288 | bfd_reloc_code_real_type *r) |
| 4289 | { |
| 4290 | /* If the next token is a '(' that was parsed as being part of a base |
| 4291 | expression, assume we have an elided offset. The later match will fail |
| 4292 | if this turns out to be wrong. */ |
| 4293 | if (arg->token->type == OT_CHAR && arg->token->u.ch == '(') |
| 4294 | { |
| 4295 | value->X_op = O_constant; |
| 4296 | value->X_add_number = 0; |
| 4297 | r[0] = r[1] = r[2] = BFD_RELOC_UNUSED; |
| 4298 | return TRUE; |
| 4299 | } |
| 4300 | |
| 4301 | /* Reject register-based expressions such as "0+$2" and "(($2))". |
| 4302 | For plain registers the default error seems more appropriate. */ |
| 4303 | if (arg->token->type == OT_INTEGER |
| 4304 | && arg->token->u.integer.value.X_op == O_register) |
| 4305 | { |
| 4306 | set_insn_error (arg->argnum, _("register value used as expression")); |
| 4307 | return FALSE; |
| 4308 | } |
| 4309 | |
| 4310 | if (arg->token->type == OT_INTEGER) |
| 4311 | { |
| 4312 | *value = arg->token->u.integer.value; |
| 4313 | memcpy (r, arg->token->u.integer.relocs, 3 * sizeof (*r)); |
| 4314 | ++arg->token; |
| 4315 | return TRUE; |
| 4316 | } |
| 4317 | |
| 4318 | set_insn_error_i |
| 4319 | (arg->argnum, _("operand %d must be an immediate expression"), |
| 4320 | arg->argnum); |
| 4321 | return FALSE; |
| 4322 | } |
| 4323 | |
| 4324 | /* Try to get a constant expression from the next tokens in ARG. Consume |
| 4325 | the tokens and return return true on success, storing the constant value |
| 4326 | in *VALUE. Use FALLBACK as the value if the match succeeded with an |
| 4327 | error. */ |
| 4328 | |
| 4329 | static bfd_boolean |
| 4330 | match_const_int (struct mips_arg_info *arg, offsetT *value) |
| 4331 | { |
| 4332 | expressionS ex; |
| 4333 | bfd_reloc_code_real_type r[3]; |
| 4334 | |
| 4335 | if (!match_expression (arg, &ex, r)) |
| 4336 | return FALSE; |
| 4337 | |
| 4338 | if (r[0] == BFD_RELOC_UNUSED && ex.X_op == O_constant) |
| 4339 | *value = ex.X_add_number; |
| 4340 | else |
| 4341 | { |
| 4342 | match_not_constant (arg); |
| 4343 | return FALSE; |
| 4344 | } |
| 4345 | return TRUE; |
| 4346 | } |
| 4347 | |
| 4348 | /* Return the RTYPE_* flags for a register operand of type TYPE that |
| 4349 | appears in instruction OPCODE. */ |
| 4350 | |
| 4351 | static unsigned int |
| 4352 | convert_reg_type (const struct mips_opcode *opcode, |
| 4353 | enum mips_reg_operand_type type) |
| 4354 | { |
| 4355 | switch (type) |
| 4356 | { |
| 4357 | case OP_REG_GP: |
| 4358 | return RTYPE_NUM | RTYPE_GP; |
| 4359 | |
| 4360 | case OP_REG_FP: |
| 4361 | /* Allow vector register names for MDMX if the instruction is a 64-bit |
| 4362 | FPR load, store or move (including moves to and from GPRs). */ |
| 4363 | if ((mips_opts.ase & ASE_MDMX) |
| 4364 | && (opcode->pinfo & FP_D) |
| 4365 | && (opcode->pinfo & (INSN_COPROC_MOVE_DELAY |
| 4366 | | INSN_COPROC_MEMORY_DELAY |
| 4367 | | INSN_LOAD_COPROC_DELAY |
| 4368 | | INSN_LOAD_MEMORY_DELAY |
| 4369 | | INSN_STORE_MEMORY))) |
| 4370 | return RTYPE_FPU | RTYPE_VEC; |
| 4371 | return RTYPE_FPU; |
| 4372 | |
| 4373 | case OP_REG_CCC: |
| 4374 | if (opcode->pinfo & (FP_D | FP_S)) |
| 4375 | return RTYPE_CCC | RTYPE_FCC; |
| 4376 | return RTYPE_CCC; |
| 4377 | |
| 4378 | case OP_REG_VEC: |
| 4379 | if (opcode->membership & INSN_5400) |
| 4380 | return RTYPE_FPU; |
| 4381 | return RTYPE_FPU | RTYPE_VEC; |
| 4382 | |
| 4383 | case OP_REG_ACC: |
| 4384 | return RTYPE_ACC; |
| 4385 | |
| 4386 | case OP_REG_COPRO: |
| 4387 | if (opcode->name[strlen (opcode->name) - 1] == '0') |
| 4388 | return RTYPE_NUM | RTYPE_CP0; |
| 4389 | return RTYPE_NUM; |
| 4390 | |
| 4391 | case OP_REG_HW: |
| 4392 | return RTYPE_NUM; |
| 4393 | |
| 4394 | case OP_REG_VI: |
| 4395 | return RTYPE_NUM | RTYPE_VI; |
| 4396 | |
| 4397 | case OP_REG_VF: |
| 4398 | return RTYPE_NUM | RTYPE_VF; |
| 4399 | |
| 4400 | case OP_REG_R5900_I: |
| 4401 | return RTYPE_R5900_I; |
| 4402 | |
| 4403 | case OP_REG_R5900_Q: |
| 4404 | return RTYPE_R5900_Q; |
| 4405 | |
| 4406 | case OP_REG_R5900_R: |
| 4407 | return RTYPE_R5900_R; |
| 4408 | |
| 4409 | case OP_REG_R5900_ACC: |
| 4410 | return RTYPE_R5900_ACC; |
| 4411 | } |
| 4412 | abort (); |
| 4413 | } |
| 4414 | |
| 4415 | /* ARG is register REGNO, of type TYPE. Warn about any dubious registers. */ |
| 4416 | |
| 4417 | static void |
| 4418 | check_regno (struct mips_arg_info *arg, |
| 4419 | enum mips_reg_operand_type type, unsigned int regno) |
| 4420 | { |
| 4421 | if (AT && type == OP_REG_GP && regno == AT) |
| 4422 | arg->seen_at = TRUE; |
| 4423 | |
| 4424 | if (type == OP_REG_FP |
| 4425 | && (regno & 1) != 0 |
| 4426 | && HAVE_32BIT_FPRS |
| 4427 | && !mips_oddfpreg_ok (arg->insn->insn_mo, arg->opnum)) |
| 4428 | as_warn (_("float register should be even, was %d"), regno); |
| 4429 | |
| 4430 | if (type == OP_REG_CCC) |
| 4431 | { |
| 4432 | const char *name; |
| 4433 | size_t length; |
| 4434 | |
| 4435 | name = arg->insn->insn_mo->name; |
| 4436 | length = strlen (name); |
| 4437 | if ((regno & 1) != 0 |
| 4438 | && ((length >= 3 && strcmp (name + length - 3, ".ps") == 0) |
| 4439 | || (length >= 5 && strncmp (name + length - 5, "any2", 4) == 0))) |
| 4440 | as_warn (_("condition code register should be even for %s, was %d"), |
| 4441 | name, regno); |
| 4442 | |
| 4443 | if ((regno & 3) != 0 |
| 4444 | && (length >= 5 && strncmp (name + length - 5, "any4", 4) == 0)) |
| 4445 | as_warn (_("condition code register should be 0 or 4 for %s, was %d"), |
| 4446 | name, regno); |
| 4447 | } |
| 4448 | } |
| 4449 | |
| 4450 | /* ARG is a register with symbol value SYMVAL. Try to interpret it as |
| 4451 | a register of type TYPE. Return true on success, storing the register |
| 4452 | number in *REGNO and warning about any dubious uses. */ |
| 4453 | |
| 4454 | static bfd_boolean |
| 4455 | match_regno (struct mips_arg_info *arg, enum mips_reg_operand_type type, |
| 4456 | unsigned int symval, unsigned int *regno) |
| 4457 | { |
| 4458 | if (type == OP_REG_VEC) |
| 4459 | symval = mips_prefer_vec_regno (symval); |
| 4460 | if (!(symval & convert_reg_type (arg->insn->insn_mo, type))) |
| 4461 | return FALSE; |
| 4462 | |
| 4463 | *regno = symval & RNUM_MASK; |
| 4464 | check_regno (arg, type, *regno); |
| 4465 | return TRUE; |
| 4466 | } |
| 4467 | |
| 4468 | /* Try to interpret the next token in ARG as a register of type TYPE. |
| 4469 | Consume the token and return true on success, storing the register |
| 4470 | number in *REGNO. Return false on failure. */ |
| 4471 | |
| 4472 | static bfd_boolean |
| 4473 | match_reg (struct mips_arg_info *arg, enum mips_reg_operand_type type, |
| 4474 | unsigned int *regno) |
| 4475 | { |
| 4476 | if (arg->token->type == OT_REG |
| 4477 | && match_regno (arg, type, arg->token->u.regno, regno)) |
| 4478 | { |
| 4479 | ++arg->token; |
| 4480 | return TRUE; |
| 4481 | } |
| 4482 | return FALSE; |
| 4483 | } |
| 4484 | |
| 4485 | /* Try to interpret the next token in ARG as a range of registers of type TYPE. |
| 4486 | Consume the token and return true on success, storing the register numbers |
| 4487 | in *REGNO1 and *REGNO2. Return false on failure. */ |
| 4488 | |
| 4489 | static bfd_boolean |
| 4490 | match_reg_range (struct mips_arg_info *arg, enum mips_reg_operand_type type, |
| 4491 | unsigned int *regno1, unsigned int *regno2) |
| 4492 | { |
| 4493 | if (match_reg (arg, type, regno1)) |
| 4494 | { |
| 4495 | *regno2 = *regno1; |
| 4496 | return TRUE; |
| 4497 | } |
| 4498 | if (arg->token->type == OT_REG_RANGE |
| 4499 | && match_regno (arg, type, arg->token->u.reg_range.regno1, regno1) |
| 4500 | && match_regno (arg, type, arg->token->u.reg_range.regno2, regno2) |
| 4501 | && *regno1 <= *regno2) |
| 4502 | { |
| 4503 | ++arg->token; |
| 4504 | return TRUE; |
| 4505 | } |
| 4506 | return FALSE; |
| 4507 | } |
| 4508 | |
| 4509 | /* OP_INT matcher. */ |
| 4510 | |
| 4511 | static bfd_boolean |
| 4512 | match_int_operand (struct mips_arg_info *arg, |
| 4513 | const struct mips_operand *operand_base) |
| 4514 | { |
| 4515 | const struct mips_int_operand *operand; |
| 4516 | unsigned int uval; |
| 4517 | int min_val, max_val, factor; |
| 4518 | offsetT sval; |
| 4519 | |
| 4520 | operand = (const struct mips_int_operand *) operand_base; |
| 4521 | factor = 1 << operand->shift; |
| 4522 | min_val = mips_int_operand_min (operand); |
| 4523 | max_val = mips_int_operand_max (operand); |
| 4524 | |
| 4525 | if (operand_base->lsb == 0 |
| 4526 | && operand_base->size == 16 |
| 4527 | && operand->shift == 0 |
| 4528 | && operand->bias == 0 |
| 4529 | && (operand->max_val == 32767 || operand->max_val == 65535)) |
| 4530 | { |
| 4531 | /* The operand can be relocated. */ |
| 4532 | if (!match_expression (arg, &offset_expr, offset_reloc)) |
| 4533 | return FALSE; |
| 4534 | |
| 4535 | if (offset_reloc[0] != BFD_RELOC_UNUSED) |
| 4536 | /* Relocation operators were used. Accept the arguent and |
| 4537 | leave the relocation value in offset_expr and offset_relocs |
| 4538 | for the caller to process. */ |
| 4539 | return TRUE; |
| 4540 | |
| 4541 | if (offset_expr.X_op != O_constant) |
| 4542 | { |
| 4543 | /* Accept non-constant operands if no later alternative matches, |
| 4544 | leaving it for the caller to process. */ |
| 4545 | if (!arg->lax_match) |
| 4546 | return FALSE; |
| 4547 | offset_reloc[0] = BFD_RELOC_LO16; |
| 4548 | return TRUE; |
| 4549 | } |
| 4550 | |
| 4551 | /* Clear the global state; we're going to install the operand |
| 4552 | ourselves. */ |
| 4553 | sval = offset_expr.X_add_number; |
| 4554 | offset_expr.X_op = O_absent; |
| 4555 | |
| 4556 | /* For compatibility with older assemblers, we accept |
| 4557 | 0x8000-0xffff as signed 16-bit numbers when only |
| 4558 | signed numbers are allowed. */ |
| 4559 | if (sval > max_val) |
| 4560 | { |
| 4561 | max_val = ((1 << operand_base->size) - 1) << operand->shift; |
| 4562 | if (!arg->lax_match && sval <= max_val) |
| 4563 | return FALSE; |
| 4564 | } |
| 4565 | } |
| 4566 | else |
| 4567 | { |
| 4568 | if (!match_const_int (arg, &sval)) |
| 4569 | return FALSE; |
| 4570 | } |
| 4571 | |
| 4572 | arg->last_op_int = sval; |
| 4573 | |
| 4574 | if (sval < min_val || sval > max_val || sval % factor) |
| 4575 | { |
| 4576 | match_out_of_range (arg); |
| 4577 | return FALSE; |
| 4578 | } |
| 4579 | |
| 4580 | uval = (unsigned int) sval >> operand->shift; |
| 4581 | uval -= operand->bias; |
| 4582 | |
| 4583 | /* Handle -mfix-cn63xxp1. */ |
| 4584 | if (arg->opnum == 1 |
| 4585 | && mips_fix_cn63xxp1 |
| 4586 | && !mips_opts.micromips |
| 4587 | && strcmp ("pref", arg->insn->insn_mo->name) == 0) |
| 4588 | switch (uval) |
| 4589 | { |
| 4590 | case 5: |
| 4591 | case 25: |
| 4592 | case 26: |
| 4593 | case 27: |
| 4594 | case 28: |
| 4595 | case 29: |
| 4596 | case 30: |
| 4597 | case 31: |
| 4598 | /* These are ok. */ |
| 4599 | break; |
| 4600 | |
| 4601 | default: |
| 4602 | /* The rest must be changed to 28. */ |
| 4603 | uval = 28; |
| 4604 | break; |
| 4605 | } |
| 4606 | |
| 4607 | insn_insert_operand (arg->insn, operand_base, uval); |
| 4608 | return TRUE; |
| 4609 | } |
| 4610 | |
| 4611 | /* OP_MAPPED_INT matcher. */ |
| 4612 | |
| 4613 | static bfd_boolean |
| 4614 | match_mapped_int_operand (struct mips_arg_info *arg, |
| 4615 | const struct mips_operand *operand_base) |
| 4616 | { |
| 4617 | const struct mips_mapped_int_operand *operand; |
| 4618 | unsigned int uval, num_vals; |
| 4619 | offsetT sval; |
| 4620 | |
| 4621 | operand = (const struct mips_mapped_int_operand *) operand_base; |
| 4622 | if (!match_const_int (arg, &sval)) |
| 4623 | return FALSE; |
| 4624 | |
| 4625 | num_vals = 1 << operand_base->size; |
| 4626 | for (uval = 0; uval < num_vals; uval++) |
| 4627 | if (operand->int_map[uval] == sval) |
| 4628 | break; |
| 4629 | if (uval == num_vals) |
| 4630 | { |
| 4631 | match_out_of_range (arg); |
| 4632 | return FALSE; |
| 4633 | } |
| 4634 | |
| 4635 | insn_insert_operand (arg->insn, operand_base, uval); |
| 4636 | return TRUE; |
| 4637 | } |
| 4638 | |
| 4639 | /* OP_MSB matcher. */ |
| 4640 | |
| 4641 | static bfd_boolean |
| 4642 | match_msb_operand (struct mips_arg_info *arg, |
| 4643 | const struct mips_operand *operand_base) |
| 4644 | { |
| 4645 | const struct mips_msb_operand *operand; |
| 4646 | int min_val, max_val, max_high; |
| 4647 | offsetT size, sval, high; |
| 4648 | |
| 4649 | operand = (const struct mips_msb_operand *) operand_base; |
| 4650 | min_val = operand->bias; |
| 4651 | max_val = min_val + (1 << operand_base->size) - 1; |
| 4652 | max_high = operand->opsize; |
| 4653 | |
| 4654 | if (!match_const_int (arg, &size)) |
| 4655 | return FALSE; |
| 4656 | |
| 4657 | high = size + arg->last_op_int; |
| 4658 | sval = operand->add_lsb ? high : size; |
| 4659 | |
| 4660 | if (size < 0 || high > max_high || sval < min_val || sval > max_val) |
| 4661 | { |
| 4662 | match_out_of_range (arg); |
| 4663 | return FALSE; |
| 4664 | } |
| 4665 | insn_insert_operand (arg->insn, operand_base, sval - min_val); |
| 4666 | return TRUE; |
| 4667 | } |
| 4668 | |
| 4669 | /* OP_REG matcher. */ |
| 4670 | |
| 4671 | static bfd_boolean |
| 4672 | match_reg_operand (struct mips_arg_info *arg, |
| 4673 | const struct mips_operand *operand_base) |
| 4674 | { |
| 4675 | const struct mips_reg_operand *operand; |
| 4676 | unsigned int regno, uval, num_vals; |
| 4677 | |
| 4678 | operand = (const struct mips_reg_operand *) operand_base; |
| 4679 | if (!match_reg (arg, operand->reg_type, ®no)) |
| 4680 | return FALSE; |
| 4681 | |
| 4682 | if (operand->reg_map) |
| 4683 | { |
| 4684 | num_vals = 1 << operand->root.size; |
| 4685 | for (uval = 0; uval < num_vals; uval++) |
| 4686 | if (operand->reg_map[uval] == regno) |
| 4687 | break; |
| 4688 | if (num_vals == uval) |
| 4689 | return FALSE; |
| 4690 | } |
| 4691 | else |
| 4692 | uval = regno; |
| 4693 | |
| 4694 | arg->last_regno = regno; |
| 4695 | if (arg->opnum == 1) |
| 4696 | arg->dest_regno = regno; |
| 4697 | insn_insert_operand (arg->insn, operand_base, uval); |
| 4698 | return TRUE; |
| 4699 | } |
| 4700 | |
| 4701 | /* OP_REG_PAIR matcher. */ |
| 4702 | |
| 4703 | static bfd_boolean |
| 4704 | match_reg_pair_operand (struct mips_arg_info *arg, |
| 4705 | const struct mips_operand *operand_base) |
| 4706 | { |
| 4707 | const struct mips_reg_pair_operand *operand; |
| 4708 | unsigned int regno1, regno2, uval, num_vals; |
| 4709 | |
| 4710 | operand = (const struct mips_reg_pair_operand *) operand_base; |
| 4711 | if (!match_reg (arg, operand->reg_type, ®no1) |
| 4712 | || !match_char (arg, ',') |
| 4713 | || !match_reg (arg, operand->reg_type, ®no2)) |
| 4714 | return FALSE; |
| 4715 | |
| 4716 | num_vals = 1 << operand_base->size; |
| 4717 | for (uval = 0; uval < num_vals; uval++) |
| 4718 | if (operand->reg1_map[uval] == regno1 && operand->reg2_map[uval] == regno2) |
| 4719 | break; |
| 4720 | if (uval == num_vals) |
| 4721 | return FALSE; |
| 4722 | |
| 4723 | insn_insert_operand (arg->insn, operand_base, uval); |
| 4724 | return TRUE; |
| 4725 | } |
| 4726 | |
| 4727 | /* OP_PCREL matcher. The caller chooses the relocation type. */ |
| 4728 | |
| 4729 | static bfd_boolean |
| 4730 | match_pcrel_operand (struct mips_arg_info *arg) |
| 4731 | { |
| 4732 | bfd_reloc_code_real_type r[3]; |
| 4733 | |
| 4734 | return match_expression (arg, &offset_expr, r) && r[0] == BFD_RELOC_UNUSED; |
| 4735 | } |
| 4736 | |
| 4737 | /* OP_PERF_REG matcher. */ |
| 4738 | |
| 4739 | static bfd_boolean |
| 4740 | match_perf_reg_operand (struct mips_arg_info *arg, |
| 4741 | const struct mips_operand *operand) |
| 4742 | { |
| 4743 | offsetT sval; |
| 4744 | |
| 4745 | if (!match_const_int (arg, &sval)) |
| 4746 | return FALSE; |
| 4747 | |
| 4748 | if (sval != 0 |
| 4749 | && (sval != 1 |
| 4750 | || (mips_opts.arch == CPU_R5900 |
| 4751 | && (strcmp (arg->insn->insn_mo->name, "mfps") == 0 |
| 4752 | || strcmp (arg->insn->insn_mo->name, "mtps") == 0)))) |
| 4753 | { |
| 4754 | set_insn_error (arg->argnum, _("invalid performance register")); |
| 4755 | return FALSE; |
| 4756 | } |
| 4757 | |
| 4758 | insn_insert_operand (arg->insn, operand, sval); |
| 4759 | return TRUE; |
| 4760 | } |
| 4761 | |
| 4762 | /* OP_ADDIUSP matcher. */ |
| 4763 | |
| 4764 | static bfd_boolean |
| 4765 | match_addiusp_operand (struct mips_arg_info *arg, |
| 4766 | const struct mips_operand *operand) |
| 4767 | { |
| 4768 | offsetT sval; |
| 4769 | unsigned int uval; |
| 4770 | |
| 4771 | if (!match_const_int (arg, &sval)) |
| 4772 | return FALSE; |
| 4773 | |
| 4774 | if (sval % 4) |
| 4775 | { |
| 4776 | match_out_of_range (arg); |
| 4777 | return FALSE; |
| 4778 | } |
| 4779 | |
| 4780 | sval /= 4; |
| 4781 | if (!(sval >= -258 && sval <= 257) || (sval >= -2 && sval <= 1)) |
| 4782 | { |
| 4783 | match_out_of_range (arg); |
| 4784 | return FALSE; |
| 4785 | } |
| 4786 | |
| 4787 | uval = (unsigned int) sval; |
| 4788 | uval = ((uval >> 1) & ~0xff) | (uval & 0xff); |
| 4789 | insn_insert_operand (arg->insn, operand, uval); |
| 4790 | return TRUE; |
| 4791 | } |
| 4792 | |
| 4793 | /* OP_CLO_CLZ_DEST matcher. */ |
| 4794 | |
| 4795 | static bfd_boolean |
| 4796 | match_clo_clz_dest_operand (struct mips_arg_info *arg, |
| 4797 | const struct mips_operand *operand) |
| 4798 | { |
| 4799 | unsigned int regno; |
| 4800 | |
| 4801 | if (!match_reg (arg, OP_REG_GP, ®no)) |
| 4802 | return FALSE; |
| 4803 | |
| 4804 | insn_insert_operand (arg->insn, operand, regno | (regno << 5)); |
| 4805 | return TRUE; |
| 4806 | } |
| 4807 | |
| 4808 | /* OP_LWM_SWM_LIST matcher. */ |
| 4809 | |
| 4810 | static bfd_boolean |
| 4811 | match_lwm_swm_list_operand (struct mips_arg_info *arg, |
| 4812 | const struct mips_operand *operand) |
| 4813 | { |
| 4814 | unsigned int reglist, sregs, ra, regno1, regno2; |
| 4815 | struct mips_arg_info reset; |
| 4816 | |
| 4817 | reglist = 0; |
| 4818 | if (!match_reg_range (arg, OP_REG_GP, ®no1, ®no2)) |
| 4819 | return FALSE; |
| 4820 | do |
| 4821 | { |
| 4822 | if (regno2 == FP && regno1 >= S0 && regno1 <= S7) |
| 4823 | { |
| 4824 | reglist |= 1 << FP; |
| 4825 | regno2 = S7; |
| 4826 | } |
| 4827 | reglist |= ((1U << regno2 << 1) - 1) & -(1U << regno1); |
| 4828 | reset = *arg; |
| 4829 | } |
| 4830 | while (match_char (arg, ',') |
| 4831 | && match_reg_range (arg, OP_REG_GP, ®no1, ®no2)); |
| 4832 | *arg = reset; |
| 4833 | |
| 4834 | if (operand->size == 2) |
| 4835 | { |
| 4836 | /* The list must include both ra and s0-sN, for 0 <= N <= 3. E.g.: |
| 4837 | |
| 4838 | s0, ra |
| 4839 | s0, s1, ra, s2, s3 |
| 4840 | s0-s2, ra |
| 4841 | |
| 4842 | and any permutations of these. */ |
| 4843 | if ((reglist & 0xfff1ffff) != 0x80010000) |
| 4844 | return FALSE; |
| 4845 | |
| 4846 | sregs = (reglist >> 17) & 7; |
| 4847 | ra = 0; |
| 4848 | } |
| 4849 | else |
| 4850 | { |
| 4851 | /* The list must include at least one of ra and s0-sN, |
| 4852 | for 0 <= N <= 8. (Note that there is a gap between s7 and s8, |
| 4853 | which are $23 and $30 respectively.) E.g.: |
| 4854 | |
| 4855 | ra |
| 4856 | s0 |
| 4857 | ra, s0, s1, s2 |
| 4858 | s0-s8 |
| 4859 | s0-s5, ra |
| 4860 | |
| 4861 | and any permutations of these. */ |
| 4862 | if ((reglist & 0x3f00ffff) != 0) |
| 4863 | return FALSE; |
| 4864 | |
| 4865 | ra = (reglist >> 27) & 0x10; |
| 4866 | sregs = ((reglist >> 22) & 0x100) | ((reglist >> 16) & 0xff); |
| 4867 | } |
| 4868 | sregs += 1; |
| 4869 | if ((sregs & -sregs) != sregs) |
| 4870 | return FALSE; |
| 4871 | |
| 4872 | insn_insert_operand (arg->insn, operand, (ffs (sregs) - 1) | ra); |
| 4873 | return TRUE; |
| 4874 | } |
| 4875 | |
| 4876 | /* OP_ENTRY_EXIT_LIST matcher. */ |
| 4877 | |
| 4878 | static unsigned int |
| 4879 | match_entry_exit_operand (struct mips_arg_info *arg, |
| 4880 | const struct mips_operand *operand) |
| 4881 | { |
| 4882 | unsigned int mask; |
| 4883 | bfd_boolean is_exit; |
| 4884 | |
| 4885 | /* The format is the same for both ENTRY and EXIT, but the constraints |
| 4886 | are different. */ |
| 4887 | is_exit = strcmp (arg->insn->insn_mo->name, "exit") == 0; |
| 4888 | mask = (is_exit ? 7 << 3 : 0); |
| 4889 | do |
| 4890 | { |
| 4891 | unsigned int regno1, regno2; |
| 4892 | bfd_boolean is_freg; |
| 4893 | |
| 4894 | if (match_reg_range (arg, OP_REG_GP, ®no1, ®no2)) |
| 4895 | is_freg = FALSE; |
| 4896 | else if (match_reg_range (arg, OP_REG_FP, ®no1, ®no2)) |
| 4897 | is_freg = TRUE; |
| 4898 | else |
| 4899 | return FALSE; |
| 4900 | |
| 4901 | if (is_exit && is_freg && regno1 == 0 && regno2 < 2) |
| 4902 | { |
| 4903 | mask &= ~(7 << 3); |
| 4904 | mask |= (5 + regno2) << 3; |
| 4905 | } |
| 4906 | else if (!is_exit && regno1 == 4 && regno2 >= 4 && regno2 <= 7) |
| 4907 | mask |= (regno2 - 3) << 3; |
| 4908 | else if (regno1 == 16 && regno2 >= 16 && regno2 <= 17) |
| 4909 | mask |= (regno2 - 15) << 1; |
| 4910 | else if (regno1 == RA && regno2 == RA) |
| 4911 | mask |= 1; |
| 4912 | else |
| 4913 | return FALSE; |
| 4914 | } |
| 4915 | while (match_char (arg, ',')); |
| 4916 | |
| 4917 | insn_insert_operand (arg->insn, operand, mask); |
| 4918 | return TRUE; |
| 4919 | } |
| 4920 | |
| 4921 | /* OP_SAVE_RESTORE_LIST matcher. */ |
| 4922 | |
| 4923 | static bfd_boolean |
| 4924 | match_save_restore_list_operand (struct mips_arg_info *arg) |
| 4925 | { |
| 4926 | unsigned int opcode, args, statics, sregs; |
| 4927 | unsigned int num_frame_sizes, num_args, num_statics, num_sregs; |
| 4928 | offsetT frame_size; |
| 4929 | |
| 4930 | opcode = arg->insn->insn_opcode; |
| 4931 | frame_size = 0; |
| 4932 | num_frame_sizes = 0; |
| 4933 | args = 0; |
| 4934 | statics = 0; |
| 4935 | sregs = 0; |
| 4936 | do |
| 4937 | { |
| 4938 | unsigned int regno1, regno2; |
| 4939 | |
| 4940 | if (arg->token->type == OT_INTEGER) |
| 4941 | { |
| 4942 | /* Handle the frame size. */ |
| 4943 | if (!match_const_int (arg, &frame_size)) |
| 4944 | return FALSE; |
| 4945 | num_frame_sizes += 1; |
| 4946 | } |
| 4947 | else |
| 4948 | { |
| 4949 | if (!match_reg_range (arg, OP_REG_GP, ®no1, ®no2)) |
| 4950 | return FALSE; |
| 4951 | |
| 4952 | while (regno1 <= regno2) |
| 4953 | { |
| 4954 | if (regno1 >= 4 && regno1 <= 7) |
| 4955 | { |
| 4956 | if (num_frame_sizes == 0) |
| 4957 | /* args $a0-$a3 */ |
| 4958 | args |= 1 << (regno1 - 4); |
| 4959 | else |
| 4960 | /* statics $a0-$a3 */ |
| 4961 | statics |= 1 << (regno1 - 4); |
| 4962 | } |
| 4963 | else if (regno1 >= 16 && regno1 <= 23) |
| 4964 | /* $s0-$s7 */ |
| 4965 | sregs |= 1 << (regno1 - 16); |
| 4966 | else if (regno1 == 30) |
| 4967 | /* $s8 */ |
| 4968 | sregs |= 1 << 8; |
| 4969 | else if (regno1 == 31) |
| 4970 | /* Add $ra to insn. */ |
| 4971 | opcode |= 0x40; |
| 4972 | else |
| 4973 | return FALSE; |
| 4974 | regno1 += 1; |
| 4975 | if (regno1 == 24) |
| 4976 | regno1 = 30; |
| 4977 | } |
| 4978 | } |
| 4979 | } |
| 4980 | while (match_char (arg, ',')); |
| 4981 | |
| 4982 | /* Encode args/statics combination. */ |
| 4983 | if (args & statics) |
| 4984 | return FALSE; |
| 4985 | else if (args == 0xf) |
| 4986 | /* All $a0-$a3 are args. */ |
| 4987 | opcode |= MIPS16_ALL_ARGS << 16; |
| 4988 | else if (statics == 0xf) |
| 4989 | /* All $a0-$a3 are statics. */ |
| 4990 | opcode |= MIPS16_ALL_STATICS << 16; |
| 4991 | else |
| 4992 | { |
| 4993 | /* Count arg registers. */ |
| 4994 | num_args = 0; |
| 4995 | while (args & 0x1) |
| 4996 | { |
| 4997 | args >>= 1; |
| 4998 | num_args += 1; |
| 4999 | } |
| 5000 | if (args != 0) |
| 5001 | return FALSE; |
| 5002 | |
| 5003 | /* Count static registers. */ |
| 5004 | num_statics = 0; |
| 5005 | while (statics & 0x8) |
| 5006 | { |
| 5007 | statics = (statics << 1) & 0xf; |
| 5008 | num_statics += 1; |
| 5009 | } |
| 5010 | if (statics != 0) |
| 5011 | return FALSE; |
| 5012 | |
| 5013 | /* Encode args/statics. */ |
| 5014 | opcode |= ((num_args << 2) | num_statics) << 16; |
| 5015 | } |
| 5016 | |
| 5017 | /* Encode $s0/$s1. */ |
| 5018 | if (sregs & (1 << 0)) /* $s0 */ |
| 5019 | opcode |= 0x20; |
| 5020 | if (sregs & (1 << 1)) /* $s1 */ |
| 5021 | opcode |= 0x10; |
| 5022 | sregs >>= 2; |
| 5023 | |
| 5024 | /* Encode $s2-$s8. */ |
| 5025 | num_sregs = 0; |
| 5026 | while (sregs & 1) |
| 5027 | { |
| 5028 | sregs >>= 1; |
| 5029 | num_sregs += 1; |
| 5030 | } |
| 5031 | if (sregs != 0) |
| 5032 | return FALSE; |
| 5033 | opcode |= num_sregs << 24; |
| 5034 | |
| 5035 | /* Encode frame size. */ |
| 5036 | if (num_frame_sizes == 0) |
| 5037 | { |
| 5038 | set_insn_error (arg->argnum, _("missing frame size")); |
| 5039 | return FALSE; |
| 5040 | } |
| 5041 | if (num_frame_sizes > 1) |
| 5042 | { |
| 5043 | set_insn_error (arg->argnum, _("frame size specified twice")); |
| 5044 | return FALSE; |
| 5045 | } |
| 5046 | if ((frame_size & 7) != 0 || frame_size < 0 || frame_size > 0xff * 8) |
| 5047 | { |
| 5048 | set_insn_error (arg->argnum, _("invalid frame size")); |
| 5049 | return FALSE; |
| 5050 | } |
| 5051 | if (frame_size != 128 || (opcode >> 16) != 0) |
| 5052 | { |
| 5053 | frame_size /= 8; |
| 5054 | opcode |= (((frame_size & 0xf0) << 16) |
| 5055 | | (frame_size & 0x0f)); |
| 5056 | } |
| 5057 | |
| 5058 | /* Finally build the instruction. */ |
| 5059 | if ((opcode >> 16) != 0 || frame_size == 0) |
| 5060 | opcode |= MIPS16_EXTEND; |
| 5061 | arg->insn->insn_opcode = opcode; |
| 5062 | return TRUE; |
| 5063 | } |
| 5064 | |
| 5065 | /* OP_MDMX_IMM_REG matcher. */ |
| 5066 | |
| 5067 | static bfd_boolean |
| 5068 | match_mdmx_imm_reg_operand (struct mips_arg_info *arg, |
| 5069 | const struct mips_operand *operand) |
| 5070 | { |
| 5071 | unsigned int regno, uval; |
| 5072 | bfd_boolean is_qh; |
| 5073 | const struct mips_opcode *opcode; |
| 5074 | |
| 5075 | /* The mips_opcode records whether this is an octobyte or quadhalf |
| 5076 | instruction. Start out with that bit in place. */ |
| 5077 | opcode = arg->insn->insn_mo; |
| 5078 | uval = mips_extract_operand (operand, opcode->match); |
| 5079 | is_qh = (uval != 0); |
| 5080 | |
| 5081 | if (arg->token->type == OT_REG || arg->token->type == OT_REG_ELEMENT) |
| 5082 | { |
| 5083 | if ((opcode->membership & INSN_5400) |
| 5084 | && strcmp (opcode->name, "rzu.ob") == 0) |
| 5085 | { |
| 5086 | set_insn_error_i (arg->argnum, _("operand %d must be an immediate"), |
| 5087 | arg->argnum); |
| 5088 | return FALSE; |
| 5089 | } |
| 5090 | |
| 5091 | /* Check whether this is a vector register or a broadcast of |
| 5092 | a single element. */ |
| 5093 | if (arg->token->type == OT_REG_ELEMENT) |
| 5094 | { |
| 5095 | if (!match_regno (arg, OP_REG_VEC, arg->token->u.reg_element.regno, |
| 5096 | ®no)) |
| 5097 | return FALSE; |
| 5098 | if (arg->token->u.reg_element.index > (is_qh ? 3 : 7)) |
| 5099 | { |
| 5100 | set_insn_error (arg->argnum, _("invalid element selector")); |
| 5101 | return FALSE; |
| 5102 | } |
| 5103 | else |
| 5104 | uval |= arg->token->u.reg_element.index << (is_qh ? 2 : 1) << 5; |
| 5105 | } |
| 5106 | else |
| 5107 | { |
| 5108 | /* A full vector. */ |
| 5109 | if ((opcode->membership & INSN_5400) |
| 5110 | && (strcmp (opcode->name, "sll.ob") == 0 |
| 5111 | || strcmp (opcode->name, "srl.ob") == 0)) |
| 5112 | { |
| 5113 | set_insn_error_i (arg->argnum, _("operand %d must be scalar"), |
| 5114 | arg->argnum); |
| 5115 | return FALSE; |
| 5116 | } |
| 5117 | |
| 5118 | if (!match_regno (arg, OP_REG_VEC, arg->token->u.regno, ®no)) |
| 5119 | return FALSE; |
| 5120 | if (is_qh) |
| 5121 | uval |= MDMX_FMTSEL_VEC_QH << 5; |
| 5122 | else |
| 5123 | uval |= MDMX_FMTSEL_VEC_OB << 5; |
| 5124 | } |
| 5125 | uval |= regno; |
| 5126 | ++arg->token; |
| 5127 | } |
| 5128 | else |
| 5129 | { |
| 5130 | offsetT sval; |
| 5131 | |
| 5132 | if (!match_const_int (arg, &sval)) |
| 5133 | return FALSE; |
| 5134 | if (sval < 0 || sval > 31) |
| 5135 | { |
| 5136 | match_out_of_range (arg); |
| 5137 | return FALSE; |
| 5138 | } |
| 5139 | uval |= (sval & 31); |
| 5140 | if (is_qh) |
| 5141 | uval |= MDMX_FMTSEL_IMM_QH << 5; |
| 5142 | else |
| 5143 | uval |= MDMX_FMTSEL_IMM_OB << 5; |
| 5144 | } |
| 5145 | insn_insert_operand (arg->insn, operand, uval); |
| 5146 | return TRUE; |
| 5147 | } |
| 5148 | |
| 5149 | /* OP_PC matcher. */ |
| 5150 | |
| 5151 | static bfd_boolean |
| 5152 | match_pc_operand (struct mips_arg_info *arg) |
| 5153 | { |
| 5154 | if (arg->token->type == OT_REG && (arg->token->u.regno & RTYPE_PC)) |
| 5155 | { |
| 5156 | ++arg->token; |
| 5157 | return TRUE; |
| 5158 | } |
| 5159 | return FALSE; |
| 5160 | } |
| 5161 | |
| 5162 | /* OP_REPEAT_DEST_REG and OP_REPEAT_PREV_REG matcher. OTHER_REGNO is the |
| 5163 | register that we need to match. */ |
| 5164 | |
| 5165 | static bfd_boolean |
| 5166 | match_tied_reg_operand (struct mips_arg_info *arg, unsigned int other_regno) |
| 5167 | { |
| 5168 | unsigned int regno; |
| 5169 | |
| 5170 | return match_reg (arg, OP_REG_GP, ®no) && regno == other_regno; |
| 5171 | } |
| 5172 | |
| 5173 | /* Read a floating-point constant from S for LI.S or LI.D. LENGTH is |
| 5174 | the length of the value in bytes (4 for float, 8 for double) and |
| 5175 | USING_GPRS says whether the destination is a GPR rather than an FPR. |
| 5176 | |
| 5177 | Return the constant in IMM and OFFSET as follows: |
| 5178 | |
| 5179 | - If the constant should be loaded via memory, set IMM to O_absent and |
| 5180 | OFFSET to the memory address. |
| 5181 | |
| 5182 | - Otherwise, if the constant should be loaded into two 32-bit registers, |
| 5183 | set IMM to the O_constant to load into the high register and OFFSET |
| 5184 | to the corresponding value for the low register. |
| 5185 | |
| 5186 | - Otherwise, set IMM to the full O_constant and set OFFSET to O_absent. |
| 5187 | |
| 5188 | These constants only appear as the last operand in an instruction, |
| 5189 | and every instruction that accepts them in any variant accepts them |
| 5190 | in all variants. This means we don't have to worry about backing out |
| 5191 | any changes if the instruction does not match. We just match |
| 5192 | unconditionally and report an error if the constant is invalid. */ |
| 5193 | |
| 5194 | static bfd_boolean |
| 5195 | match_float_constant (struct mips_arg_info *arg, expressionS *imm, |
| 5196 | expressionS *offset, int length, bfd_boolean using_gprs) |
| 5197 | { |
| 5198 | char *p; |
| 5199 | segT seg, new_seg; |
| 5200 | subsegT subseg; |
| 5201 | const char *newname; |
| 5202 | unsigned char *data; |
| 5203 | |
| 5204 | /* Where the constant is placed is based on how the MIPS assembler |
| 5205 | does things: |
| 5206 | |
| 5207 | length == 4 && using_gprs -- immediate value only |
| 5208 | length == 8 && using_gprs -- .rdata or immediate value |
| 5209 | length == 4 && !using_gprs -- .lit4 or immediate value |
| 5210 | length == 8 && !using_gprs -- .lit8 or immediate value |
| 5211 | |
| 5212 | The .lit4 and .lit8 sections are only used if permitted by the |
| 5213 | -G argument. */ |
| 5214 | if (arg->token->type != OT_FLOAT) |
| 5215 | { |
| 5216 | set_insn_error (arg->argnum, _("floating-point expression required")); |
| 5217 | return FALSE; |
| 5218 | } |
| 5219 | |
| 5220 | gas_assert (arg->token->u.flt.length == length); |
| 5221 | data = arg->token->u.flt.data; |
| 5222 | ++arg->token; |
| 5223 | |
| 5224 | /* Handle 32-bit constants for which an immediate value is best. */ |
| 5225 | if (length == 4 |
| 5226 | && (using_gprs |
| 5227 | || g_switch_value < 4 |
| 5228 | || (data[0] == 0 && data[1] == 0) |
| 5229 | || (data[2] == 0 && data[3] == 0))) |
| 5230 | { |
| 5231 | imm->X_op = O_constant; |
| 5232 | if (!target_big_endian) |
| 5233 | imm->X_add_number = bfd_getl32 (data); |
| 5234 | else |
| 5235 | imm->X_add_number = bfd_getb32 (data); |
| 5236 | offset->X_op = O_absent; |
| 5237 | return TRUE; |
| 5238 | } |
| 5239 | |
| 5240 | /* Handle 64-bit constants for which an immediate value is best. */ |
| 5241 | if (length == 8 |
| 5242 | && !mips_disable_float_construction |
| 5243 | /* Constants can only be constructed in GPRs and copied |
| 5244 | to FPRs if the GPRs are at least as wide as the FPRs. |
| 5245 | Force the constant into memory if we are using 64-bit FPRs |
| 5246 | but the GPRs are only 32 bits wide. */ |
| 5247 | /* ??? No longer true with the addition of MTHC1, but this |
| 5248 | is legacy code... */ |
| 5249 | && (using_gprs || !(HAVE_64BIT_FPRS && HAVE_32BIT_GPRS)) |
| 5250 | && ((data[0] == 0 && data[1] == 0) |
| 5251 | || (data[2] == 0 && data[3] == 0)) |
| 5252 | && ((data[4] == 0 && data[5] == 0) |
| 5253 | || (data[6] == 0 && data[7] == 0))) |
| 5254 | { |
| 5255 | /* The value is simple enough to load with a couple of instructions. |
| 5256 | If using 32-bit registers, set IMM to the high order 32 bits and |
| 5257 | OFFSET to the low order 32 bits. Otherwise, set IMM to the entire |
| 5258 | 64 bit constant. */ |
| 5259 | if (using_gprs ? HAVE_32BIT_GPRS : HAVE_32BIT_FPRS) |
| 5260 | { |
| 5261 | imm->X_op = O_constant; |
| 5262 | offset->X_op = O_constant; |
| 5263 | if (!target_big_endian) |
| 5264 | { |
| 5265 | imm->X_add_number = bfd_getl32 (data + 4); |
| 5266 | offset->X_add_number = bfd_getl32 (data); |
| 5267 | } |
| 5268 | else |
| 5269 | { |
| 5270 | imm->X_add_number = bfd_getb32 (data); |
| 5271 | offset->X_add_number = bfd_getb32 (data + 4); |
| 5272 | } |
| 5273 | if (offset->X_add_number == 0) |
| 5274 | offset->X_op = O_absent; |
| 5275 | } |
| 5276 | else |
| 5277 | { |
| 5278 | imm->X_op = O_constant; |
| 5279 | if (!target_big_endian) |
| 5280 | imm->X_add_number = bfd_getl64 (data); |
| 5281 | else |
| 5282 | imm->X_add_number = bfd_getb64 (data); |
| 5283 | offset->X_op = O_absent; |
| 5284 | } |
| 5285 | return TRUE; |
| 5286 | } |
| 5287 | |
| 5288 | /* Switch to the right section. */ |
| 5289 | seg = now_seg; |
| 5290 | subseg = now_subseg; |
| 5291 | if (length == 4) |
| 5292 | { |
| 5293 | gas_assert (!using_gprs && g_switch_value >= 4); |
| 5294 | newname = ".lit4"; |
| 5295 | } |
| 5296 | else |
| 5297 | { |
| 5298 | if (using_gprs || g_switch_value < 8) |
| 5299 | newname = RDATA_SECTION_NAME; |
| 5300 | else |
| 5301 | newname = ".lit8"; |
| 5302 | } |
| 5303 | |
| 5304 | new_seg = subseg_new (newname, (subsegT) 0); |
| 5305 | bfd_set_section_flags (stdoutput, new_seg, |
| 5306 | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA); |
| 5307 | frag_align (length == 4 ? 2 : 3, 0, 0); |
| 5308 | if (strncmp (TARGET_OS, "elf", 3) != 0) |
| 5309 | record_alignment (new_seg, 4); |
| 5310 | else |
| 5311 | record_alignment (new_seg, length == 4 ? 2 : 3); |
| 5312 | if (seg == now_seg) |
| 5313 | as_bad (_("cannot use `%s' in this section"), arg->insn->insn_mo->name); |
| 5314 | |
| 5315 | /* Set the argument to the current address in the section. */ |
| 5316 | imm->X_op = O_absent; |
| 5317 | offset->X_op = O_symbol; |
| 5318 | offset->X_add_symbol = symbol_temp_new_now (); |
| 5319 | offset->X_add_number = 0; |
| 5320 | |
| 5321 | /* Put the floating point number into the section. */ |
| 5322 | p = frag_more (length); |
| 5323 | memcpy (p, data, length); |
| 5324 | |
| 5325 | /* Switch back to the original section. */ |
| 5326 | subseg_set (seg, subseg); |
| 5327 | return TRUE; |
| 5328 | } |
| 5329 | |
| 5330 | /* OP_VU0_SUFFIX and OP_VU0_MATCH_SUFFIX matcher; MATCH_P selects between |
| 5331 | them. */ |
| 5332 | |
| 5333 | static bfd_boolean |
| 5334 | match_vu0_suffix_operand (struct mips_arg_info *arg, |
| 5335 | const struct mips_operand *operand, |
| 5336 | bfd_boolean match_p) |
| 5337 | { |
| 5338 | unsigned int uval; |
| 5339 | |
| 5340 | /* The operand can be an XYZW mask or a single 2-bit channel index |
| 5341 | (with X being 0). */ |
| 5342 | gas_assert (operand->size == 2 || operand->size == 4); |
| 5343 | |
| 5344 | /* The suffix can be omitted when it is already part of the opcode. */ |
| 5345 | if (arg->token->type != OT_CHANNELS) |
| 5346 | return match_p; |
| 5347 | |
| 5348 | uval = arg->token->u.channels; |
| 5349 | if (operand->size == 2) |
| 5350 | { |
| 5351 | /* Check that a single bit is set and convert it into a 2-bit index. */ |
| 5352 | if ((uval & -uval) != uval) |
| 5353 | return FALSE; |
| 5354 | uval = 4 - ffs (uval); |
| 5355 | } |
| 5356 | |
| 5357 | if (match_p && insn_extract_operand (arg->insn, operand) != uval) |
| 5358 | return FALSE; |
| 5359 | |
| 5360 | ++arg->token; |
| 5361 | if (!match_p) |
| 5362 | insn_insert_operand (arg->insn, operand, uval); |
| 5363 | return TRUE; |
| 5364 | } |
| 5365 | |
| 5366 | /* S is the text seen for ARG. Match it against OPERAND. Return the end |
| 5367 | of the argument text if the match is successful, otherwise return null. */ |
| 5368 | |
| 5369 | static bfd_boolean |
| 5370 | match_operand (struct mips_arg_info *arg, |
| 5371 | const struct mips_operand *operand) |
| 5372 | { |
| 5373 | switch (operand->type) |
| 5374 | { |
| 5375 | case OP_INT: |
| 5376 | return match_int_operand (arg, operand); |
| 5377 | |
| 5378 | case OP_MAPPED_INT: |
| 5379 | return match_mapped_int_operand (arg, operand); |
| 5380 | |
| 5381 | case OP_MSB: |
| 5382 | return match_msb_operand (arg, operand); |
| 5383 | |
| 5384 | case OP_REG: |
| 5385 | case OP_OPTIONAL_REG: |
| 5386 | return match_reg_operand (arg, operand); |
| 5387 | |
| 5388 | case OP_REG_PAIR: |
| 5389 | return match_reg_pair_operand (arg, operand); |
| 5390 | |
| 5391 | case OP_PCREL: |
| 5392 | return match_pcrel_operand (arg); |
| 5393 | |
| 5394 | case OP_PERF_REG: |
| 5395 | return match_perf_reg_operand (arg, operand); |
| 5396 | |
| 5397 | case OP_ADDIUSP_INT: |
| 5398 | return match_addiusp_operand (arg, operand); |
| 5399 | |
| 5400 | case OP_CLO_CLZ_DEST: |
| 5401 | return match_clo_clz_dest_operand (arg, operand); |
| 5402 | |
| 5403 | case OP_LWM_SWM_LIST: |
| 5404 | return match_lwm_swm_list_operand (arg, operand); |
| 5405 | |
| 5406 | case OP_ENTRY_EXIT_LIST: |
| 5407 | return match_entry_exit_operand (arg, operand); |
| 5408 | |
| 5409 | case OP_SAVE_RESTORE_LIST: |
| 5410 | return match_save_restore_list_operand (arg); |
| 5411 | |
| 5412 | case OP_MDMX_IMM_REG: |
| 5413 | return match_mdmx_imm_reg_operand (arg, operand); |
| 5414 | |
| 5415 | case OP_REPEAT_DEST_REG: |
| 5416 | return match_tied_reg_operand (arg, arg->dest_regno); |
| 5417 | |
| 5418 | case OP_REPEAT_PREV_REG: |
| 5419 | return match_tied_reg_operand (arg, arg->last_regno); |
| 5420 | |
| 5421 | case OP_PC: |
| 5422 | return match_pc_operand (arg); |
| 5423 | |
| 5424 | case OP_VU0_SUFFIX: |
| 5425 | return match_vu0_suffix_operand (arg, operand, FALSE); |
| 5426 | |
| 5427 | case OP_VU0_MATCH_SUFFIX: |
| 5428 | return match_vu0_suffix_operand (arg, operand, TRUE); |
| 5429 | } |
| 5430 | abort (); |
| 5431 | } |
| 5432 | |
| 5433 | /* ARG is the state after successfully matching an instruction. |
| 5434 | Issue any queued-up warnings. */ |
| 5435 | |
| 5436 | static void |
| 5437 | check_completed_insn (struct mips_arg_info *arg) |
| 5438 | { |
| 5439 | if (arg->seen_at) |
| 5440 | { |
| 5441 | if (AT == ATREG) |
| 5442 | as_warn (_("used $at without \".set noat\"")); |
| 5443 | else |
| 5444 | as_warn (_("used $%u with \".set at=$%u\""), AT, AT); |
| 5445 | } |
| 5446 | } |
| 5447 | |
| 5448 | /* Return true if modifying general-purpose register REG needs a delay. */ |
| 5449 | |
| 5450 | static bfd_boolean |
| 5451 | reg_needs_delay (unsigned int reg) |
| 5452 | { |
| 5453 | unsigned long prev_pinfo; |
| 5454 | |
| 5455 | prev_pinfo = history[0].insn_mo->pinfo; |
| 5456 | if (!mips_opts.noreorder |
| 5457 | && (((prev_pinfo & INSN_LOAD_MEMORY_DELAY) && !gpr_interlocks) |
| 5458 | || ((prev_pinfo & INSN_LOAD_COPROC_DELAY) && !cop_interlocks)) |
| 5459 | && (gpr_write_mask (&history[0]) & (1 << reg))) |
| 5460 | return TRUE; |
| 5461 | |
| 5462 | return FALSE; |
| 5463 | } |
| 5464 | |
| 5465 | /* Classify an instruction according to the FIX_VR4120_* enumeration. |
| 5466 | Return NUM_FIX_VR4120_CLASSES if the instruction isn't affected |
| 5467 | by VR4120 errata. */ |
| 5468 | |
| 5469 | static unsigned int |
| 5470 | classify_vr4120_insn (const char *name) |
| 5471 | { |
| 5472 | if (strncmp (name, "macc", 4) == 0) |
| 5473 | return FIX_VR4120_MACC; |
| 5474 | if (strncmp (name, "dmacc", 5) == 0) |
| 5475 | return FIX_VR4120_DMACC; |
| 5476 | if (strncmp (name, "mult", 4) == 0) |
| 5477 | return FIX_VR4120_MULT; |
| 5478 | if (strncmp (name, "dmult", 5) == 0) |
| 5479 | return FIX_VR4120_DMULT; |
| 5480 | if (strstr (name, "div")) |
| 5481 | return FIX_VR4120_DIV; |
| 5482 | if (strcmp (name, "mtlo") == 0 || strcmp (name, "mthi") == 0) |
| 5483 | return FIX_VR4120_MTHILO; |
| 5484 | return NUM_FIX_VR4120_CLASSES; |
| 5485 | } |
| 5486 | |
| 5487 | #define INSN_ERET 0x42000018 |
| 5488 | #define INSN_DERET 0x4200001f |
| 5489 | |
| 5490 | /* Return the number of instructions that must separate INSN1 and INSN2, |
| 5491 | where INSN1 is the earlier instruction. Return the worst-case value |
| 5492 | for any INSN2 if INSN2 is null. */ |
| 5493 | |
| 5494 | static unsigned int |
| 5495 | insns_between (const struct mips_cl_insn *insn1, |
| 5496 | const struct mips_cl_insn *insn2) |
| 5497 | { |
| 5498 | unsigned long pinfo1, pinfo2; |
| 5499 | unsigned int mask; |
| 5500 | |
| 5501 | /* If INFO2 is null, pessimistically assume that all flags are set for |
| 5502 | the second instruction. */ |
| 5503 | pinfo1 = insn1->insn_mo->pinfo; |
| 5504 | pinfo2 = insn2 ? insn2->insn_mo->pinfo : ~0U; |
| 5505 | |
| 5506 | /* For most targets, write-after-read dependencies on the HI and LO |
| 5507 | registers must be separated by at least two instructions. */ |
| 5508 | if (!hilo_interlocks) |
| 5509 | { |
| 5510 | if ((pinfo1 & INSN_READ_LO) && (pinfo2 & INSN_WRITE_LO)) |
| 5511 | return 2; |
| 5512 | if ((pinfo1 & INSN_READ_HI) && (pinfo2 & INSN_WRITE_HI)) |
| 5513 | return 2; |
| 5514 | } |
| 5515 | |
| 5516 | /* If we're working around r7000 errata, there must be two instructions |
| 5517 | between an mfhi or mflo and any instruction that uses the result. */ |
| 5518 | if (mips_7000_hilo_fix |
| 5519 | && !mips_opts.micromips |
| 5520 | && MF_HILO_INSN (pinfo1) |
| 5521 | && (insn2 == NULL || (gpr_read_mask (insn2) & gpr_write_mask (insn1)))) |
| 5522 | return 2; |
| 5523 | |
| 5524 | /* If we're working around 24K errata, one instruction is required |
| 5525 | if an ERET or DERET is followed by a branch instruction. */ |
| 5526 | if (mips_fix_24k && !mips_opts.micromips) |
| 5527 | { |
| 5528 | if (insn1->insn_opcode == INSN_ERET |
| 5529 | || insn1->insn_opcode == INSN_DERET) |
| 5530 | { |
| 5531 | if (insn2 == NULL |
| 5532 | || insn2->insn_opcode == INSN_ERET |
| 5533 | || insn2->insn_opcode == INSN_DERET |
| 5534 | || delayed_branch_p (insn2)) |
| 5535 | return 1; |
| 5536 | } |
| 5537 | } |
| 5538 | |
| 5539 | /* If working around VR4120 errata, check for combinations that need |
| 5540 | a single intervening instruction. */ |
| 5541 | if (mips_fix_vr4120 && !mips_opts.micromips) |
| 5542 | { |
| 5543 | unsigned int class1, class2; |
| 5544 | |
| 5545 | class1 = classify_vr4120_insn (insn1->insn_mo->name); |
| 5546 | if (class1 != NUM_FIX_VR4120_CLASSES && vr4120_conflicts[class1] != 0) |
| 5547 | { |
| 5548 | if (insn2 == NULL) |
| 5549 | return 1; |
| 5550 | class2 = classify_vr4120_insn (insn2->insn_mo->name); |
| 5551 | if (vr4120_conflicts[class1] & (1 << class2)) |
| 5552 | return 1; |
| 5553 | } |
| 5554 | } |
| 5555 | |
| 5556 | if (!HAVE_CODE_COMPRESSION) |
| 5557 | { |
| 5558 | /* Check for GPR or coprocessor load delays. All such delays |
| 5559 | are on the RT register. */ |
| 5560 | /* Itbl support may require additional care here. */ |
| 5561 | if ((!gpr_interlocks && (pinfo1 & INSN_LOAD_MEMORY_DELAY)) |
| 5562 | || (!cop_interlocks && (pinfo1 & INSN_LOAD_COPROC_DELAY))) |
| 5563 | { |
| 5564 | if (insn2 == NULL || (gpr_read_mask (insn2) & gpr_write_mask (insn1))) |
| 5565 | return 1; |
| 5566 | } |
| 5567 | |
| 5568 | /* Check for generic coprocessor hazards. |
| 5569 | |
| 5570 | This case is not handled very well. There is no special |
| 5571 | knowledge of CP0 handling, and the coprocessors other than |
| 5572 | the floating point unit are not distinguished at all. */ |
| 5573 | /* Itbl support may require additional care here. FIXME! |
| 5574 | Need to modify this to include knowledge about |
| 5575 | user specified delays! */ |
| 5576 | else if ((!cop_interlocks && (pinfo1 & INSN_COPROC_MOVE_DELAY)) |
| 5577 | || (!cop_mem_interlocks && (pinfo1 & INSN_COPROC_MEMORY_DELAY))) |
| 5578 | { |
| 5579 | /* Handle cases where INSN1 writes to a known general coprocessor |
| 5580 | register. There must be a one instruction delay before INSN2 |
| 5581 | if INSN2 reads that register, otherwise no delay is needed. */ |
| 5582 | mask = fpr_write_mask (insn1); |
| 5583 | if (mask != 0) |
| 5584 | { |
| 5585 | if (!insn2 || (mask & fpr_read_mask (insn2)) != 0) |
| 5586 | return 1; |
| 5587 | } |
| 5588 | else |
| 5589 | { |
| 5590 | /* Read-after-write dependencies on the control registers |
| 5591 | require a two-instruction gap. */ |
| 5592 | if ((pinfo1 & INSN_WRITE_COND_CODE) |
| 5593 | && (pinfo2 & INSN_READ_COND_CODE)) |
| 5594 | return 2; |
| 5595 | |
| 5596 | /* We don't know exactly what INSN1 does. If INSN2 is |
| 5597 | also a coprocessor instruction, assume there must be |
| 5598 | a one instruction gap. */ |
| 5599 | if (pinfo2 & INSN_COP) |
| 5600 | return 1; |
| 5601 | } |
| 5602 | } |
| 5603 | |
| 5604 | /* Check for read-after-write dependencies on the coprocessor |
| 5605 | control registers in cases where INSN1 does not need a general |
| 5606 | coprocessor delay. This means that INSN1 is a floating point |
| 5607 | comparison instruction. */ |
| 5608 | /* Itbl support may require additional care here. */ |
| 5609 | else if (!cop_interlocks |
| 5610 | && (pinfo1 & INSN_WRITE_COND_CODE) |
| 5611 | && (pinfo2 & INSN_READ_COND_CODE)) |
| 5612 | return 1; |
| 5613 | } |
| 5614 | |
| 5615 | return 0; |
| 5616 | } |
| 5617 | |
| 5618 | /* Return the number of nops that would be needed to work around the |
| 5619 | VR4130 mflo/mfhi errata if instruction INSN immediately followed |
| 5620 | the MAX_VR4130_NOPS instructions described by HIST. Ignore hazards |
| 5621 | that are contained within the first IGNORE instructions of HIST. */ |
| 5622 | |
| 5623 | static int |
| 5624 | nops_for_vr4130 (int ignore, const struct mips_cl_insn *hist, |
| 5625 | const struct mips_cl_insn *insn) |
| 5626 | { |
| 5627 | int i, j; |
| 5628 | unsigned int mask; |
| 5629 | |
| 5630 | /* Check if the instruction writes to HI or LO. MTHI and MTLO |
| 5631 | are not affected by the errata. */ |
| 5632 | if (insn != 0 |
| 5633 | && ((insn->insn_mo->pinfo & (INSN_WRITE_HI | INSN_WRITE_LO)) == 0 |
| 5634 | || strcmp (insn->insn_mo->name, "mtlo") == 0 |
| 5635 | || strcmp (insn->insn_mo->name, "mthi") == 0)) |
| 5636 | return 0; |
| 5637 | |
| 5638 | /* Search for the first MFLO or MFHI. */ |
| 5639 | for (i = 0; i < MAX_VR4130_NOPS; i++) |
| 5640 | if (MF_HILO_INSN (hist[i].insn_mo->pinfo)) |
| 5641 | { |
| 5642 | /* Extract the destination register. */ |
| 5643 | mask = gpr_write_mask (&hist[i]); |
| 5644 | |
| 5645 | /* No nops are needed if INSN reads that register. */ |
| 5646 | if (insn != NULL && (gpr_read_mask (insn) & mask) != 0) |
| 5647 | return 0; |
| 5648 | |
| 5649 | /* ...or if any of the intervening instructions do. */ |
| 5650 | for (j = 0; j < i; j++) |
| 5651 | if (gpr_read_mask (&hist[j]) & mask) |
| 5652 | return 0; |
| 5653 | |
| 5654 | if (i >= ignore) |
| 5655 | return MAX_VR4130_NOPS - i; |
| 5656 | } |
| 5657 | return 0; |
| 5658 | } |
| 5659 | |
| 5660 | #define BASE_REG_EQ(INSN1, INSN2) \ |
| 5661 | ((((INSN1) >> OP_SH_RS) & OP_MASK_RS) \ |
| 5662 | == (((INSN2) >> OP_SH_RS) & OP_MASK_RS)) |
| 5663 | |
| 5664 | /* Return the minimum alignment for this store instruction. */ |
| 5665 | |
| 5666 | static int |
| 5667 | fix_24k_align_to (const struct mips_opcode *mo) |
| 5668 | { |
| 5669 | if (strcmp (mo->name, "sh") == 0) |
| 5670 | return 2; |
| 5671 | |
| 5672 | if (strcmp (mo->name, "swc1") == 0 |
| 5673 | || strcmp (mo->name, "swc2") == 0 |
| 5674 | || strcmp (mo->name, "sw") == 0 |
| 5675 | || strcmp (mo->name, "sc") == 0 |
| 5676 | || strcmp (mo->name, "s.s") == 0) |
| 5677 | return 4; |
| 5678 | |
| 5679 | if (strcmp (mo->name, "sdc1") == 0 |
| 5680 | || strcmp (mo->name, "sdc2") == 0 |
| 5681 | || strcmp (mo->name, "s.d") == 0) |
| 5682 | return 8; |
| 5683 | |
| 5684 | /* sb, swl, swr */ |
| 5685 | return 1; |
| 5686 | } |
| 5687 | |
| 5688 | struct fix_24k_store_info |
| 5689 | { |
| 5690 | /* Immediate offset, if any, for this store instruction. */ |
| 5691 | short off; |
| 5692 | /* Alignment required by this store instruction. */ |
| 5693 | int align_to; |
| 5694 | /* True for register offsets. */ |
| 5695 | int register_offset; |
| 5696 | }; |
| 5697 | |
| 5698 | /* Comparison function used by qsort. */ |
| 5699 | |
| 5700 | static int |
| 5701 | fix_24k_sort (const void *a, const void *b) |
| 5702 | { |
| 5703 | const struct fix_24k_store_info *pos1 = a; |
| 5704 | const struct fix_24k_store_info *pos2 = b; |
| 5705 | |
| 5706 | return (pos1->off - pos2->off); |
| 5707 | } |
| 5708 | |
| 5709 | /* INSN is a store instruction. Try to record the store information |
| 5710 | in STINFO. Return false if the information isn't known. */ |
| 5711 | |
| 5712 | static bfd_boolean |
| 5713 | fix_24k_record_store_info (struct fix_24k_store_info *stinfo, |
| 5714 | const struct mips_cl_insn *insn) |
| 5715 | { |
| 5716 | /* The instruction must have a known offset. */ |
| 5717 | if (!insn->complete_p || !strstr (insn->insn_mo->args, "o(")) |
| 5718 | return FALSE; |
| 5719 | |
| 5720 | stinfo->off = (insn->insn_opcode >> OP_SH_IMMEDIATE) & OP_MASK_IMMEDIATE; |
| 5721 | stinfo->align_to = fix_24k_align_to (insn->insn_mo); |
| 5722 | return TRUE; |
| 5723 | } |
| 5724 | |
| 5725 | /* Return the number of nops that would be needed to work around the 24k |
| 5726 | "lost data on stores during refill" errata if instruction INSN |
| 5727 | immediately followed the 2 instructions described by HIST. |
| 5728 | Ignore hazards that are contained within the first IGNORE |
| 5729 | instructions of HIST. |
| 5730 | |
| 5731 | Problem: The FSB (fetch store buffer) acts as an intermediate buffer |
| 5732 | for the data cache refills and store data. The following describes |
| 5733 | the scenario where the store data could be lost. |
| 5734 | |
| 5735 | * A data cache miss, due to either a load or a store, causing fill |
| 5736 | data to be supplied by the memory subsystem |
| 5737 | * The first three doublewords of fill data are returned and written |
| 5738 | into the cache |
| 5739 | * A sequence of four stores occurs in consecutive cycles around the |
| 5740 | final doubleword of the fill: |
| 5741 | * Store A |
| 5742 | * Store B |
| 5743 | * Store C |
| 5744 | * Zero, One or more instructions |
| 5745 | * Store D |
| 5746 | |
| 5747 | The four stores A-D must be to different doublewords of the line that |
| 5748 | is being filled. The fourth instruction in the sequence above permits |
| 5749 | the fill of the final doubleword to be transferred from the FSB into |
| 5750 | the cache. In the sequence above, the stores may be either integer |
| 5751 | (sb, sh, sw, swr, swl, sc) or coprocessor (swc1/swc2, sdc1/sdc2, |
| 5752 | swxc1, sdxc1, suxc1) stores, as long as the four stores are to |
| 5753 | different doublewords on the line. If the floating point unit is |
| 5754 | running in 1:2 mode, it is not possible to create the sequence above |
| 5755 | using only floating point store instructions. |
| 5756 | |
| 5757 | In this case, the cache line being filled is incorrectly marked |
| 5758 | invalid, thereby losing the data from any store to the line that |
| 5759 | occurs between the original miss and the completion of the five |
| 5760 | cycle sequence shown above. |
| 5761 | |
| 5762 | The workarounds are: |
| 5763 | |
| 5764 | * Run the data cache in write-through mode. |
| 5765 | * Insert a non-store instruction between |
| 5766 | Store A and Store B or Store B and Store C. */ |
| 5767 | |
| 5768 | static int |
| 5769 | nops_for_24k (int ignore, const struct mips_cl_insn *hist, |
| 5770 | const struct mips_cl_insn *insn) |
| 5771 | { |
| 5772 | struct fix_24k_store_info pos[3]; |
| 5773 | int align, i, base_offset; |
| 5774 | |
| 5775 | if (ignore >= 2) |
| 5776 | return 0; |
| 5777 | |
| 5778 | /* If the previous instruction wasn't a store, there's nothing to |
| 5779 | worry about. */ |
| 5780 | if ((hist[0].insn_mo->pinfo & INSN_STORE_MEMORY) == 0) |
| 5781 | return 0; |
| 5782 | |
| 5783 | /* If the instructions after the previous one are unknown, we have |
| 5784 | to assume the worst. */ |
| 5785 | if (!insn) |
| 5786 | return 1; |
| 5787 | |
| 5788 | /* Check whether we are dealing with three consecutive stores. */ |
| 5789 | if ((insn->insn_mo->pinfo & INSN_STORE_MEMORY) == 0 |
| 5790 | || (hist[1].insn_mo->pinfo & INSN_STORE_MEMORY) == 0) |
| 5791 | return 0; |
| 5792 | |
| 5793 | /* If we don't know the relationship between the store addresses, |
| 5794 | assume the worst. */ |
| 5795 | if (!BASE_REG_EQ (insn->insn_opcode, hist[0].insn_opcode) |
| 5796 | || !BASE_REG_EQ (insn->insn_opcode, hist[1].insn_opcode)) |
| 5797 | return 1; |
| 5798 | |
| 5799 | if (!fix_24k_record_store_info (&pos[0], insn) |
| 5800 | || !fix_24k_record_store_info (&pos[1], &hist[0]) |
| 5801 | || !fix_24k_record_store_info (&pos[2], &hist[1])) |
| 5802 | return 1; |
| 5803 | |
| 5804 | qsort (&pos, 3, sizeof (struct fix_24k_store_info), fix_24k_sort); |
| 5805 | |
| 5806 | /* Pick a value of ALIGN and X such that all offsets are adjusted by |
| 5807 | X bytes and such that the base register + X is known to be aligned |
| 5808 | to align bytes. */ |
| 5809 | |
| 5810 | if (((insn->insn_opcode >> OP_SH_RS) & OP_MASK_RS) == SP) |
| 5811 | align = 8; |
| 5812 | else |
| 5813 | { |
| 5814 | align = pos[0].align_to; |
| 5815 | base_offset = pos[0].off; |
| 5816 | for (i = 1; i < 3; i++) |
| 5817 | if (align < pos[i].align_to) |
| 5818 | { |
| 5819 | align = pos[i].align_to; |
| 5820 | base_offset = pos[i].off; |
| 5821 | } |
| 5822 | for (i = 0; i < 3; i++) |
| 5823 | pos[i].off -= base_offset; |
| 5824 | } |
| 5825 | |
| 5826 | pos[0].off &= ~align + 1; |
| 5827 | pos[1].off &= ~align + 1; |
| 5828 | pos[2].off &= ~align + 1; |
| 5829 | |
| 5830 | /* If any two stores write to the same chunk, they also write to the |
| 5831 | same doubleword. The offsets are still sorted at this point. */ |
| 5832 | if (pos[0].off == pos[1].off || pos[1].off == pos[2].off) |
| 5833 | return 0; |
| 5834 | |
| 5835 | /* A range of at least 9 bytes is needed for the stores to be in |
| 5836 | non-overlapping doublewords. */ |
| 5837 | if (pos[2].off - pos[0].off <= 8) |
| 5838 | return 0; |
| 5839 | |
| 5840 | if (pos[2].off - pos[1].off >= 24 |
| 5841 | || pos[1].off - pos[0].off >= 24 |
| 5842 | || pos[2].off - pos[0].off >= 32) |
| 5843 | return 0; |
| 5844 | |
| 5845 | return 1; |
| 5846 | } |
| 5847 | |
| 5848 | /* Return the number of nops that would be needed if instruction INSN |
| 5849 | immediately followed the MAX_NOPS instructions given by HIST, |
| 5850 | where HIST[0] is the most recent instruction. Ignore hazards |
| 5851 | between INSN and the first IGNORE instructions in HIST. |
| 5852 | |
| 5853 | If INSN is null, return the worse-case number of nops for any |
| 5854 | instruction. */ |
| 5855 | |
| 5856 | static int |
| 5857 | nops_for_insn (int ignore, const struct mips_cl_insn *hist, |
| 5858 | const struct mips_cl_insn *insn) |
| 5859 | { |
| 5860 | int i, nops, tmp_nops; |
| 5861 | |
| 5862 | nops = 0; |
| 5863 | for (i = ignore; i < MAX_DELAY_NOPS; i++) |
| 5864 | { |
| 5865 | tmp_nops = insns_between (hist + i, insn) - i; |
| 5866 | if (tmp_nops > nops) |
| 5867 | nops = tmp_nops; |
| 5868 | } |
| 5869 | |
| 5870 | if (mips_fix_vr4130 && !mips_opts.micromips) |
| 5871 | { |
| 5872 | tmp_nops = nops_for_vr4130 (ignore, hist, insn); |
| 5873 | if (tmp_nops > nops) |
| 5874 | nops = tmp_nops; |
| 5875 | } |
| 5876 | |
| 5877 | if (mips_fix_24k && !mips_opts.micromips) |
| 5878 | { |
| 5879 | tmp_nops = nops_for_24k (ignore, hist, insn); |
| 5880 | if (tmp_nops > nops) |
| 5881 | nops = tmp_nops; |
| 5882 | } |
| 5883 | |
| 5884 | return nops; |
| 5885 | } |
| 5886 | |
| 5887 | /* The variable arguments provide NUM_INSNS extra instructions that |
| 5888 | might be added to HIST. Return the largest number of nops that |
| 5889 | would be needed after the extended sequence, ignoring hazards |
| 5890 | in the first IGNORE instructions. */ |
| 5891 | |
| 5892 | static int |
| 5893 | nops_for_sequence (int num_insns, int ignore, |
| 5894 | const struct mips_cl_insn *hist, ...) |
| 5895 | { |
| 5896 | va_list args; |
| 5897 | struct mips_cl_insn buffer[MAX_NOPS]; |
| 5898 | struct mips_cl_insn *cursor; |
| 5899 | int nops; |
| 5900 | |
| 5901 | va_start (args, hist); |
| 5902 | cursor = buffer + num_insns; |
| 5903 | memcpy (cursor, hist, (MAX_NOPS - num_insns) * sizeof (*cursor)); |
| 5904 | while (cursor > buffer) |
| 5905 | *--cursor = *va_arg (args, const struct mips_cl_insn *); |
| 5906 | |
| 5907 | nops = nops_for_insn (ignore, buffer, NULL); |
| 5908 | va_end (args); |
| 5909 | return nops; |
| 5910 | } |
| 5911 | |
| 5912 | /* Like nops_for_insn, but if INSN is a branch, take into account the |
| 5913 | worst-case delay for the branch target. */ |
| 5914 | |
| 5915 | static int |
| 5916 | nops_for_insn_or_target (int ignore, const struct mips_cl_insn *hist, |
| 5917 | const struct mips_cl_insn *insn) |
| 5918 | { |
| 5919 | int nops, tmp_nops; |
| 5920 | |
| 5921 | nops = nops_for_insn (ignore, hist, insn); |
| 5922 | if (delayed_branch_p (insn)) |
| 5923 | { |
| 5924 | tmp_nops = nops_for_sequence (2, ignore ? ignore + 2 : 0, |
| 5925 | hist, insn, get_delay_slot_nop (insn)); |
| 5926 | if (tmp_nops > nops) |
| 5927 | nops = tmp_nops; |
| 5928 | } |
| 5929 | else if (compact_branch_p (insn)) |
| 5930 | { |
| 5931 | tmp_nops = nops_for_sequence (1, ignore ? ignore + 1 : 0, hist, insn); |
| 5932 | if (tmp_nops > nops) |
| 5933 | nops = tmp_nops; |
| 5934 | } |
| 5935 | return nops; |
| 5936 | } |
| 5937 | |
| 5938 | /* Fix NOP issue: Replace nops by "or at,at,zero". */ |
| 5939 | |
| 5940 | static void |
| 5941 | fix_loongson2f_nop (struct mips_cl_insn * ip) |
| 5942 | { |
| 5943 | gas_assert (!HAVE_CODE_COMPRESSION); |
| 5944 | if (strcmp (ip->insn_mo->name, "nop") == 0) |
| 5945 | ip->insn_opcode = LOONGSON2F_NOP_INSN; |
| 5946 | } |
| 5947 | |
| 5948 | /* Fix Jump Issue: Eliminate instruction fetch from outside 256M region |
| 5949 | jr target pc &= 'hffff_ffff_cfff_ffff. */ |
| 5950 | |
| 5951 | static void |
| 5952 | fix_loongson2f_jump (struct mips_cl_insn * ip) |
| 5953 | { |
| 5954 | gas_assert (!HAVE_CODE_COMPRESSION); |
| 5955 | if (strcmp (ip->insn_mo->name, "j") == 0 |
| 5956 | || strcmp (ip->insn_mo->name, "jr") == 0 |
| 5957 | || strcmp (ip->insn_mo->name, "jalr") == 0) |
| 5958 | { |
| 5959 | int sreg; |
| 5960 | expressionS ep; |
| 5961 | |
| 5962 | if (! mips_opts.at) |
| 5963 | return; |
| 5964 | |
| 5965 | sreg = EXTRACT_OPERAND (0, RS, *ip); |
| 5966 | if (sreg == ZERO || sreg == KT0 || sreg == KT1 || sreg == ATREG) |
| 5967 | return; |
| 5968 | |
| 5969 | ep.X_op = O_constant; |
| 5970 | ep.X_add_number = 0xcfff0000; |
| 5971 | macro_build (&ep, "lui", "t,u", ATREG, BFD_RELOC_HI16); |
| 5972 | ep.X_add_number = 0xffff; |
| 5973 | macro_build (&ep, "ori", "t,r,i", ATREG, ATREG, BFD_RELOC_LO16); |
| 5974 | macro_build (NULL, "and", "d,v,t", sreg, sreg, ATREG); |
| 5975 | } |
| 5976 | } |
| 5977 | |
| 5978 | static void |
| 5979 | fix_loongson2f (struct mips_cl_insn * ip) |
| 5980 | { |
| 5981 | if (mips_fix_loongson2f_nop) |
| 5982 | fix_loongson2f_nop (ip); |
| 5983 | |
| 5984 | if (mips_fix_loongson2f_jump) |
| 5985 | fix_loongson2f_jump (ip); |
| 5986 | } |
| 5987 | |
| 5988 | /* IP is a branch that has a delay slot, and we need to fill it |
| 5989 | automatically. Return true if we can do that by swapping IP |
| 5990 | with the previous instruction. |
| 5991 | ADDRESS_EXPR is an operand of the instruction to be used with |
| 5992 | RELOC_TYPE. */ |
| 5993 | |
| 5994 | static bfd_boolean |
| 5995 | can_swap_branch_p (struct mips_cl_insn *ip, expressionS *address_expr, |
| 5996 | bfd_reloc_code_real_type *reloc_type) |
| 5997 | { |
| 5998 | unsigned long pinfo, pinfo2, prev_pinfo, prev_pinfo2; |
| 5999 | unsigned int gpr_read, gpr_write, prev_gpr_read, prev_gpr_write; |
| 6000 | |
| 6001 | /* -O2 and above is required for this optimization. */ |
| 6002 | if (mips_optimize < 2) |
| 6003 | return FALSE; |
| 6004 | |
| 6005 | /* If we have seen .set volatile or .set nomove, don't optimize. */ |
| 6006 | if (mips_opts.nomove) |
| 6007 | return FALSE; |
| 6008 | |
| 6009 | /* We can't swap if the previous instruction's position is fixed. */ |
| 6010 | if (history[0].fixed_p) |
| 6011 | return FALSE; |
| 6012 | |
| 6013 | /* If the previous previous insn was in a .set noreorder, we can't |
| 6014 | swap. Actually, the MIPS assembler will swap in this situation. |
| 6015 | However, gcc configured -with-gnu-as will generate code like |
| 6016 | |
| 6017 | .set noreorder |
| 6018 | lw $4,XXX |
| 6019 | .set reorder |
| 6020 | INSN |
| 6021 | bne $4,$0,foo |
| 6022 | |
| 6023 | in which we can not swap the bne and INSN. If gcc is not configured |
| 6024 | -with-gnu-as, it does not output the .set pseudo-ops. */ |
| 6025 | if (history[1].noreorder_p) |
| 6026 | return FALSE; |
| 6027 | |
| 6028 | /* If the previous instruction had a fixup in mips16 mode, we can not swap. |
| 6029 | This means that the previous instruction was a 4-byte one anyhow. */ |
| 6030 | if (mips_opts.mips16 && history[0].fixp[0]) |
| 6031 | return FALSE; |
| 6032 | |
| 6033 | /* If the branch is itself the target of a branch, we can not swap. |
| 6034 | We cheat on this; all we check for is whether there is a label on |
| 6035 | this instruction. If there are any branches to anything other than |
| 6036 | a label, users must use .set noreorder. */ |
| 6037 | if (seg_info (now_seg)->label_list) |
| 6038 | return FALSE; |
| 6039 | |
| 6040 | /* If the previous instruction is in a variant frag other than this |
| 6041 | branch's one, we cannot do the swap. This does not apply to |
| 6042 | MIPS16 code, which uses variant frags for different purposes. */ |
| 6043 | if (!mips_opts.mips16 |
| 6044 | && history[0].frag |
| 6045 | && history[0].frag->fr_type == rs_machine_dependent) |
| 6046 | return FALSE; |
| 6047 | |
| 6048 | /* We do not swap with instructions that cannot architecturally |
| 6049 | be placed in a branch delay slot, such as SYNC or ERET. We |
| 6050 | also refrain from swapping with a trap instruction, since it |
| 6051 | complicates trap handlers to have the trap instruction be in |
| 6052 | a delay slot. */ |
| 6053 | prev_pinfo = history[0].insn_mo->pinfo; |
| 6054 | if (prev_pinfo & INSN_NO_DELAY_SLOT) |
| 6055 | return FALSE; |
| 6056 | |
| 6057 | /* Check for conflicts between the branch and the instructions |
| 6058 | before the candidate delay slot. */ |
| 6059 | if (nops_for_insn (0, history + 1, ip) > 0) |
| 6060 | return FALSE; |
| 6061 | |
| 6062 | /* Check for conflicts between the swapped sequence and the |
| 6063 | target of the branch. */ |
| 6064 | if (nops_for_sequence (2, 0, history + 1, ip, history) > 0) |
| 6065 | return FALSE; |
| 6066 | |
| 6067 | /* If the branch reads a register that the previous |
| 6068 | instruction sets, we can not swap. */ |
| 6069 | gpr_read = gpr_read_mask (ip); |
| 6070 | prev_gpr_write = gpr_write_mask (&history[0]); |
| 6071 | if (gpr_read & prev_gpr_write) |
| 6072 | return FALSE; |
| 6073 | |
| 6074 | /* If the branch writes a register that the previous |
| 6075 | instruction sets, we can not swap. */ |
| 6076 | gpr_write = gpr_write_mask (ip); |
| 6077 | if (gpr_write & prev_gpr_write) |
| 6078 | return FALSE; |
| 6079 | |
| 6080 | /* If the branch writes a register that the previous |
| 6081 | instruction reads, we can not swap. */ |
| 6082 | prev_gpr_read = gpr_read_mask (&history[0]); |
| 6083 | if (gpr_write & prev_gpr_read) |
| 6084 | return FALSE; |
| 6085 | |
| 6086 | /* If one instruction sets a condition code and the |
| 6087 | other one uses a condition code, we can not swap. */ |
| 6088 | pinfo = ip->insn_mo->pinfo; |
| 6089 | if ((pinfo & INSN_READ_COND_CODE) |
| 6090 | && (prev_pinfo & INSN_WRITE_COND_CODE)) |
| 6091 | return FALSE; |
| 6092 | if ((pinfo & INSN_WRITE_COND_CODE) |
| 6093 | && (prev_pinfo & INSN_READ_COND_CODE)) |
| 6094 | return FALSE; |
| 6095 | |
| 6096 | /* If the previous instruction uses the PC, we can not swap. */ |
| 6097 | prev_pinfo2 = history[0].insn_mo->pinfo2; |
| 6098 | if (prev_pinfo2 & INSN2_READ_PC) |
| 6099 | return FALSE; |
| 6100 | |
| 6101 | /* If the previous instruction has an incorrect size for a fixed |
| 6102 | branch delay slot in microMIPS mode, we cannot swap. */ |
| 6103 | pinfo2 = ip->insn_mo->pinfo2; |
| 6104 | if (mips_opts.micromips |
| 6105 | && (pinfo2 & INSN2_BRANCH_DELAY_16BIT) |
| 6106 | && insn_length (history) != 2) |
| 6107 | return FALSE; |
| 6108 | if (mips_opts.micromips |
| 6109 | && (pinfo2 & INSN2_BRANCH_DELAY_32BIT) |
| 6110 | && insn_length (history) != 4) |
| 6111 | return FALSE; |
| 6112 | |
| 6113 | /* On R5900 short loops need to be fixed by inserting a nop in |
| 6114 | the branch delay slots. |
| 6115 | A short loop can be terminated too early. */ |
| 6116 | if (mips_opts.arch == CPU_R5900 |
| 6117 | /* Check if instruction has a parameter, ignore "j $31". */ |
| 6118 | && (address_expr != NULL) |
| 6119 | /* Parameter must be 16 bit. */ |
| 6120 | && (*reloc_type == BFD_RELOC_16_PCREL_S2) |
| 6121 | /* Branch to same segment. */ |
| 6122 | && (S_GET_SEGMENT(address_expr->X_add_symbol) == now_seg) |
| 6123 | /* Branch to same code fragment. */ |
| 6124 | && (symbol_get_frag(address_expr->X_add_symbol) == frag_now) |
| 6125 | /* Can only calculate branch offset if value is known. */ |
| 6126 | && symbol_constant_p(address_expr->X_add_symbol) |
| 6127 | /* Check if branch is really conditional. */ |
| 6128 | && !((ip->insn_opcode & 0xffff0000) == 0x10000000 /* beq $0,$0 */ |
| 6129 | || (ip->insn_opcode & 0xffff0000) == 0x04010000 /* bgez $0 */ |
| 6130 | || (ip->insn_opcode & 0xffff0000) == 0x04110000)) /* bgezal $0 */ |
| 6131 | { |
| 6132 | int distance; |
| 6133 | /* Check if loop is shorter than 6 instructions including |
| 6134 | branch and delay slot. */ |
| 6135 | distance = frag_now_fix() - S_GET_VALUE(address_expr->X_add_symbol); |
| 6136 | if (distance <= 20) |
| 6137 | { |
| 6138 | int i; |
| 6139 | int rv; |
| 6140 | |
| 6141 | rv = FALSE; |
| 6142 | /* When the loop includes branches or jumps, |
| 6143 | it is not a short loop. */ |
| 6144 | for (i = 0; i < (distance / 4); i++) |
| 6145 | { |
| 6146 | if ((history[i].cleared_p) |
| 6147 | || delayed_branch_p(&history[i])) |
| 6148 | { |
| 6149 | rv = TRUE; |
| 6150 | break; |
| 6151 | } |
| 6152 | } |
| 6153 | if (rv == FALSE) |
| 6154 | { |
| 6155 | /* Insert nop after branch to fix short loop. */ |
| 6156 | return FALSE; |
| 6157 | } |
| 6158 | } |
| 6159 | } |
| 6160 | |
| 6161 | return TRUE; |
| 6162 | } |
| 6163 | |
| 6164 | /* Decide how we should add IP to the instruction stream. |
| 6165 | ADDRESS_EXPR is an operand of the instruction to be used with |
| 6166 | RELOC_TYPE. */ |
| 6167 | |
| 6168 | static enum append_method |
| 6169 | get_append_method (struct mips_cl_insn *ip, expressionS *address_expr, |
| 6170 | bfd_reloc_code_real_type *reloc_type) |
| 6171 | { |
| 6172 | /* The relaxed version of a macro sequence must be inherently |
| 6173 | hazard-free. */ |
| 6174 | if (mips_relax.sequence == 2) |
| 6175 | return APPEND_ADD; |
| 6176 | |
| 6177 | /* We must not dabble with instructions in a ".set norerorder" block. */ |
| 6178 | if (mips_opts.noreorder) |
| 6179 | return APPEND_ADD; |
| 6180 | |
| 6181 | /* Otherwise, it's our responsibility to fill branch delay slots. */ |
| 6182 | if (delayed_branch_p (ip)) |
| 6183 | { |
| 6184 | if (!branch_likely_p (ip) |
| 6185 | && can_swap_branch_p (ip, address_expr, reloc_type)) |
| 6186 | return APPEND_SWAP; |
| 6187 | |
| 6188 | if (mips_opts.mips16 |
| 6189 | && ISA_SUPPORTS_MIPS16E |
| 6190 | && gpr_read_mask (ip) != 0) |
| 6191 | return APPEND_ADD_COMPACT; |
| 6192 | |
| 6193 | return APPEND_ADD_WITH_NOP; |
| 6194 | } |
| 6195 | |
| 6196 | return APPEND_ADD; |
| 6197 | } |
| 6198 | |
| 6199 | /* IP is a MIPS16 instruction whose opcode we have just changed. |
| 6200 | Point IP->insn_mo to the new opcode's definition. */ |
| 6201 | |
| 6202 | static void |
| 6203 | find_altered_mips16_opcode (struct mips_cl_insn *ip) |
| 6204 | { |
| 6205 | const struct mips_opcode *mo, *end; |
| 6206 | |
| 6207 | end = &mips16_opcodes[bfd_mips16_num_opcodes]; |
| 6208 | for (mo = ip->insn_mo; mo < end; mo++) |
| 6209 | if ((ip->insn_opcode & mo->mask) == mo->match) |
| 6210 | { |
| 6211 | ip->insn_mo = mo; |
| 6212 | return; |
| 6213 | } |
| 6214 | abort (); |
| 6215 | } |
| 6216 | |
| 6217 | /* For microMIPS macros, we need to generate a local number label |
| 6218 | as the target of branches. */ |
| 6219 | #define MICROMIPS_LABEL_CHAR '\037' |
| 6220 | static unsigned long micromips_target_label; |
| 6221 | static char micromips_target_name[32]; |
| 6222 | |
| 6223 | static char * |
| 6224 | micromips_label_name (void) |
| 6225 | { |
| 6226 | char *p = micromips_target_name; |
| 6227 | char symbol_name_temporary[24]; |
| 6228 | unsigned long l; |
| 6229 | int i; |
| 6230 | |
| 6231 | if (*p) |
| 6232 | return p; |
| 6233 | |
| 6234 | i = 0; |
| 6235 | l = micromips_target_label; |
| 6236 | #ifdef LOCAL_LABEL_PREFIX |
| 6237 | *p++ = LOCAL_LABEL_PREFIX; |
| 6238 | #endif |
| 6239 | *p++ = 'L'; |
| 6240 | *p++ = MICROMIPS_LABEL_CHAR; |
| 6241 | do |
| 6242 | { |
| 6243 | symbol_name_temporary[i++] = l % 10 + '0'; |
| 6244 | l /= 10; |
| 6245 | } |
| 6246 | while (l != 0); |
| 6247 | while (i > 0) |
| 6248 | *p++ = symbol_name_temporary[--i]; |
| 6249 | *p = '\0'; |
| 6250 | |
| 6251 | return micromips_target_name; |
| 6252 | } |
| 6253 | |
| 6254 | static void |
| 6255 | micromips_label_expr (expressionS *label_expr) |
| 6256 | { |
| 6257 | label_expr->X_op = O_symbol; |
| 6258 | label_expr->X_add_symbol = symbol_find_or_make (micromips_label_name ()); |
| 6259 | label_expr->X_add_number = 0; |
| 6260 | } |
| 6261 | |
| 6262 | static void |
| 6263 | micromips_label_inc (void) |
| 6264 | { |
| 6265 | micromips_target_label++; |
| 6266 | *micromips_target_name = '\0'; |
| 6267 | } |
| 6268 | |
| 6269 | static void |
| 6270 | micromips_add_label (void) |
| 6271 | { |
| 6272 | symbolS *s; |
| 6273 | |
| 6274 | s = colon (micromips_label_name ()); |
| 6275 | micromips_label_inc (); |
| 6276 | S_SET_OTHER (s, ELF_ST_SET_MICROMIPS (S_GET_OTHER (s))); |
| 6277 | } |
| 6278 | |
| 6279 | /* If assembling microMIPS code, then return the microMIPS reloc |
| 6280 | corresponding to the requested one if any. Otherwise return |
| 6281 | the reloc unchanged. */ |
| 6282 | |
| 6283 | static bfd_reloc_code_real_type |
| 6284 | micromips_map_reloc (bfd_reloc_code_real_type reloc) |
| 6285 | { |
| 6286 | static const bfd_reloc_code_real_type relocs[][2] = |
| 6287 | { |
| 6288 | /* Keep sorted incrementally by the left-hand key. */ |
| 6289 | { BFD_RELOC_16_PCREL_S2, BFD_RELOC_MICROMIPS_16_PCREL_S1 }, |
| 6290 | { BFD_RELOC_GPREL16, BFD_RELOC_MICROMIPS_GPREL16 }, |
| 6291 | { BFD_RELOC_MIPS_JMP, BFD_RELOC_MICROMIPS_JMP }, |
| 6292 | { BFD_RELOC_HI16, BFD_RELOC_MICROMIPS_HI16 }, |
| 6293 | { BFD_RELOC_HI16_S, BFD_RELOC_MICROMIPS_HI16_S }, |
| 6294 | { BFD_RELOC_LO16, BFD_RELOC_MICROMIPS_LO16 }, |
| 6295 | { BFD_RELOC_MIPS_LITERAL, BFD_RELOC_MICROMIPS_LITERAL }, |
| 6296 | { BFD_RELOC_MIPS_GOT16, BFD_RELOC_MICROMIPS_GOT16 }, |
| 6297 | { BFD_RELOC_MIPS_CALL16, BFD_RELOC_MICROMIPS_CALL16 }, |
| 6298 | { BFD_RELOC_MIPS_GOT_HI16, BFD_RELOC_MICROMIPS_GOT_HI16 }, |
| 6299 | { BFD_RELOC_MIPS_GOT_LO16, BFD_RELOC_MICROMIPS_GOT_LO16 }, |
| 6300 | { BFD_RELOC_MIPS_CALL_HI16, BFD_RELOC_MICROMIPS_CALL_HI16 }, |
| 6301 | { BFD_RELOC_MIPS_CALL_LO16, BFD_RELOC_MICROMIPS_CALL_LO16 }, |
| 6302 | { BFD_RELOC_MIPS_SUB, BFD_RELOC_MICROMIPS_SUB }, |
| 6303 | { BFD_RELOC_MIPS_GOT_PAGE, BFD_RELOC_MICROMIPS_GOT_PAGE }, |
| 6304 | { BFD_RELOC_MIPS_GOT_OFST, BFD_RELOC_MICROMIPS_GOT_OFST }, |
| 6305 | { BFD_RELOC_MIPS_GOT_DISP, BFD_RELOC_MICROMIPS_GOT_DISP }, |
| 6306 | { BFD_RELOC_MIPS_HIGHEST, BFD_RELOC_MICROMIPS_HIGHEST }, |
| 6307 | { BFD_RELOC_MIPS_HIGHER, BFD_RELOC_MICROMIPS_HIGHER }, |
| 6308 | { BFD_RELOC_MIPS_SCN_DISP, BFD_RELOC_MICROMIPS_SCN_DISP }, |
| 6309 | { BFD_RELOC_MIPS_TLS_GD, BFD_RELOC_MICROMIPS_TLS_GD }, |
| 6310 | { BFD_RELOC_MIPS_TLS_LDM, BFD_RELOC_MICROMIPS_TLS_LDM }, |
| 6311 | { BFD_RELOC_MIPS_TLS_DTPREL_HI16, BFD_RELOC_MICROMIPS_TLS_DTPREL_HI16 }, |
| 6312 | { BFD_RELOC_MIPS_TLS_DTPREL_LO16, BFD_RELOC_MICROMIPS_TLS_DTPREL_LO16 }, |
| 6313 | { BFD_RELOC_MIPS_TLS_GOTTPREL, BFD_RELOC_MICROMIPS_TLS_GOTTPREL }, |
| 6314 | { BFD_RELOC_MIPS_TLS_TPREL_HI16, BFD_RELOC_MICROMIPS_TLS_TPREL_HI16 }, |
| 6315 | { BFD_RELOC_MIPS_TLS_TPREL_LO16, BFD_RELOC_MICROMIPS_TLS_TPREL_LO16 } |
| 6316 | }; |
| 6317 | bfd_reloc_code_real_type r; |
| 6318 | size_t i; |
| 6319 | |
| 6320 | if (!mips_opts.micromips) |
| 6321 | return reloc; |
| 6322 | for (i = 0; i < ARRAY_SIZE (relocs); i++) |
| 6323 | { |
| 6324 | r = relocs[i][0]; |
| 6325 | if (r > reloc) |
| 6326 | return reloc; |
| 6327 | if (r == reloc) |
| 6328 | return relocs[i][1]; |
| 6329 | } |
| 6330 | return reloc; |
| 6331 | } |
| 6332 | |
| 6333 | /* Try to resolve relocation RELOC against constant OPERAND at assembly time. |
| 6334 | Return true on success, storing the resolved value in RESULT. */ |
| 6335 | |
| 6336 | static bfd_boolean |
| 6337 | calculate_reloc (bfd_reloc_code_real_type reloc, offsetT operand, |
| 6338 | offsetT *result) |
| 6339 | { |
| 6340 | switch (reloc) |
| 6341 | { |
| 6342 | case BFD_RELOC_MIPS_HIGHEST: |
| 6343 | case BFD_RELOC_MICROMIPS_HIGHEST: |
| 6344 | *result = ((operand + 0x800080008000ull) >> 48) & 0xffff; |
| 6345 | return TRUE; |
| 6346 | |
| 6347 | case BFD_RELOC_MIPS_HIGHER: |
| 6348 | case BFD_RELOC_MICROMIPS_HIGHER: |
| 6349 | *result = ((operand + 0x80008000ull) >> 32) & 0xffff; |
| 6350 | return TRUE; |
| 6351 | |
| 6352 | case BFD_RELOC_HI16_S: |
| 6353 | case BFD_RELOC_MICROMIPS_HI16_S: |
| 6354 | case BFD_RELOC_MIPS16_HI16_S: |
| 6355 | *result = ((operand + 0x8000) >> 16) & 0xffff; |
| 6356 | return TRUE; |
| 6357 | |
| 6358 | case BFD_RELOC_HI16: |
| 6359 | case BFD_RELOC_MICROMIPS_HI16: |
| 6360 | case BFD_RELOC_MIPS16_HI16: |
| 6361 | *result = (operand >> 16) & 0xffff; |
| 6362 | return TRUE; |
| 6363 | |
| 6364 | case BFD_RELOC_LO16: |
| 6365 | case BFD_RELOC_MICROMIPS_LO16: |
| 6366 | case BFD_RELOC_MIPS16_LO16: |
| 6367 | *result = operand & 0xffff; |
| 6368 | return TRUE; |
| 6369 | |
| 6370 | case BFD_RELOC_UNUSED: |
| 6371 | *result = operand; |
| 6372 | return TRUE; |
| 6373 | |
| 6374 | default: |
| 6375 | return FALSE; |
| 6376 | } |
| 6377 | } |
| 6378 | |
| 6379 | /* Output an instruction. IP is the instruction information. |
| 6380 | ADDRESS_EXPR is an operand of the instruction to be used with |
| 6381 | RELOC_TYPE. EXPANSIONP is true if the instruction is part of |
| 6382 | a macro expansion. */ |
| 6383 | |
| 6384 | static void |
| 6385 | append_insn (struct mips_cl_insn *ip, expressionS *address_expr, |
| 6386 | bfd_reloc_code_real_type *reloc_type, bfd_boolean expansionp) |
| 6387 | { |
| 6388 | unsigned long prev_pinfo2, pinfo; |
| 6389 | bfd_boolean relaxed_branch = FALSE; |
| 6390 | enum append_method method; |
| 6391 | bfd_boolean relax32; |
| 6392 | int branch_disp; |
| 6393 | |
| 6394 | if (mips_fix_loongson2f && !HAVE_CODE_COMPRESSION) |
| 6395 | fix_loongson2f (ip); |
| 6396 | |
| 6397 | file_ase_mips16 |= mips_opts.mips16; |
| 6398 | file_ase_micromips |= mips_opts.micromips; |
| 6399 | |
| 6400 | prev_pinfo2 = history[0].insn_mo->pinfo2; |
| 6401 | pinfo = ip->insn_mo->pinfo; |
| 6402 | |
| 6403 | if (mips_opts.micromips |
| 6404 | && !expansionp |
| 6405 | && (((prev_pinfo2 & INSN2_BRANCH_DELAY_16BIT) != 0 |
| 6406 | && micromips_insn_length (ip->insn_mo) != 2) |
| 6407 | || ((prev_pinfo2 & INSN2_BRANCH_DELAY_32BIT) != 0 |
| 6408 | && micromips_insn_length (ip->insn_mo) != 4))) |
| 6409 | as_warn (_("wrong size instruction in a %u-bit branch delay slot"), |
| 6410 | (prev_pinfo2 & INSN2_BRANCH_DELAY_16BIT) != 0 ? 16 : 32); |
| 6411 | |
| 6412 | if (address_expr == NULL) |
| 6413 | ip->complete_p = 1; |
| 6414 | else if (reloc_type[0] <= BFD_RELOC_UNUSED |
| 6415 | && reloc_type[1] == BFD_RELOC_UNUSED |
| 6416 | && reloc_type[2] == BFD_RELOC_UNUSED |
| 6417 | && address_expr->X_op == O_constant) |
| 6418 | { |
| 6419 | switch (*reloc_type) |
| 6420 | { |
| 6421 | case BFD_RELOC_MIPS_JMP: |
| 6422 | { |
| 6423 | int shift; |
| 6424 | |
| 6425 | shift = mips_opts.micromips ? 1 : 2; |
| 6426 | if ((address_expr->X_add_number & ((1 << shift) - 1)) != 0) |
| 6427 | as_bad (_("jump to misaligned address (0x%lx)"), |
| 6428 | (unsigned long) address_expr->X_add_number); |
| 6429 | ip->insn_opcode |= ((address_expr->X_add_number >> shift) |
| 6430 | & 0x3ffffff); |
| 6431 | ip->complete_p = 1; |
| 6432 | } |
| 6433 | break; |
| 6434 | |
| 6435 | case BFD_RELOC_MIPS16_JMP: |
| 6436 | if ((address_expr->X_add_number & 3) != 0) |
| 6437 | as_bad (_("jump to misaligned address (0x%lx)"), |
| 6438 | (unsigned long) address_expr->X_add_number); |
| 6439 | ip->insn_opcode |= |
| 6440 | (((address_expr->X_add_number & 0x7c0000) << 3) |
| 6441 | | ((address_expr->X_add_number & 0xf800000) >> 7) |
| 6442 | | ((address_expr->X_add_number & 0x3fffc) >> 2)); |
| 6443 | ip->complete_p = 1; |
| 6444 | break; |
| 6445 | |
| 6446 | case BFD_RELOC_16_PCREL_S2: |
| 6447 | { |
| 6448 | int shift; |
| 6449 | |
| 6450 | shift = mips_opts.micromips ? 1 : 2; |
| 6451 | if ((address_expr->X_add_number & ((1 << shift) - 1)) != 0) |
| 6452 | as_bad (_("branch to misaligned address (0x%lx)"), |
| 6453 | (unsigned long) address_expr->X_add_number); |
| 6454 | if (!mips_relax_branch) |
| 6455 | { |
| 6456 | if ((address_expr->X_add_number + (1 << (shift + 15))) |
| 6457 | & ~((1 << (shift + 16)) - 1)) |
| 6458 | as_bad (_("branch address range overflow (0x%lx)"), |
| 6459 | (unsigned long) address_expr->X_add_number); |
| 6460 | ip->insn_opcode |= ((address_expr->X_add_number >> shift) |
| 6461 | & 0xffff); |
| 6462 | } |
| 6463 | } |
| 6464 | break; |
| 6465 | |
| 6466 | default: |
| 6467 | { |
| 6468 | offsetT value; |
| 6469 | |
| 6470 | if (calculate_reloc (*reloc_type, address_expr->X_add_number, |
| 6471 | &value)) |
| 6472 | { |
| 6473 | ip->insn_opcode |= value & 0xffff; |
| 6474 | ip->complete_p = 1; |
| 6475 | } |
| 6476 | } |
| 6477 | break; |
| 6478 | } |
| 6479 | } |
| 6480 | |
| 6481 | if (mips_relax.sequence != 2 && !mips_opts.noreorder) |
| 6482 | { |
| 6483 | /* There are a lot of optimizations we could do that we don't. |
| 6484 | In particular, we do not, in general, reorder instructions. |
| 6485 | If you use gcc with optimization, it will reorder |
| 6486 | instructions and generally do much more optimization then we |
| 6487 | do here; repeating all that work in the assembler would only |
| 6488 | benefit hand written assembly code, and does not seem worth |
| 6489 | it. */ |
| 6490 | int nops = (mips_optimize == 0 |
| 6491 | ? nops_for_insn (0, history, NULL) |
| 6492 | : nops_for_insn_or_target (0, history, ip)); |
| 6493 | if (nops > 0) |
| 6494 | { |
| 6495 | fragS *old_frag; |
| 6496 | unsigned long old_frag_offset; |
| 6497 | int i; |
| 6498 | |
| 6499 | old_frag = frag_now; |
| 6500 | old_frag_offset = frag_now_fix (); |
| 6501 | |
| 6502 | for (i = 0; i < nops; i++) |
| 6503 | add_fixed_insn (NOP_INSN); |
| 6504 | insert_into_history (0, nops, NOP_INSN); |
| 6505 | |
| 6506 | if (listing) |
| 6507 | { |
| 6508 | listing_prev_line (); |
| 6509 | /* We may be at the start of a variant frag. In case we |
| 6510 | are, make sure there is enough space for the frag |
| 6511 | after the frags created by listing_prev_line. The |
| 6512 | argument to frag_grow here must be at least as large |
| 6513 | as the argument to all other calls to frag_grow in |
| 6514 | this file. We don't have to worry about being in the |
| 6515 | middle of a variant frag, because the variants insert |
| 6516 | all needed nop instructions themselves. */ |
| 6517 | frag_grow (40); |
| 6518 | } |
| 6519 | |
| 6520 | mips_move_text_labels (); |
| 6521 | |
| 6522 | #ifndef NO_ECOFF_DEBUGGING |
| 6523 | if (ECOFF_DEBUGGING) |
| 6524 | ecoff_fix_loc (old_frag, old_frag_offset); |
| 6525 | #endif |
| 6526 | } |
| 6527 | } |
| 6528 | else if (mips_relax.sequence != 2 && prev_nop_frag != NULL) |
| 6529 | { |
| 6530 | int nops; |
| 6531 | |
| 6532 | /* Work out how many nops in prev_nop_frag are needed by IP, |
| 6533 | ignoring hazards generated by the first prev_nop_frag_since |
| 6534 | instructions. */ |
| 6535 | nops = nops_for_insn_or_target (prev_nop_frag_since, history, ip); |
| 6536 | gas_assert (nops <= prev_nop_frag_holds); |
| 6537 | |
| 6538 | /* Enforce NOPS as a minimum. */ |
| 6539 | if (nops > prev_nop_frag_required) |
| 6540 | prev_nop_frag_required = nops; |
| 6541 | |
| 6542 | if (prev_nop_frag_holds == prev_nop_frag_required) |
| 6543 | { |
| 6544 | /* Settle for the current number of nops. Update the history |
| 6545 | accordingly (for the benefit of any future .set reorder code). */ |
| 6546 | prev_nop_frag = NULL; |
| 6547 | insert_into_history (prev_nop_frag_since, |
| 6548 | prev_nop_frag_holds, NOP_INSN); |
| 6549 | } |
| 6550 | else |
| 6551 | { |
| 6552 | /* Allow this instruction to replace one of the nops that was |
| 6553 | tentatively added to prev_nop_frag. */ |
| 6554 | prev_nop_frag->fr_fix -= NOP_INSN_SIZE; |
| 6555 | prev_nop_frag_holds--; |
| 6556 | prev_nop_frag_since++; |
| 6557 | } |
| 6558 | } |
| 6559 | |
| 6560 | method = get_append_method (ip, address_expr, reloc_type); |
| 6561 | branch_disp = method == APPEND_SWAP ? insn_length (history) : 0; |
| 6562 | |
| 6563 | dwarf2_emit_insn (0); |
| 6564 | /* We want MIPS16 and microMIPS debug info to use ISA-encoded addresses, |
| 6565 | so "move" the instruction address accordingly. |
| 6566 | |
| 6567 | Also, it doesn't seem appropriate for the assembler to reorder .loc |
| 6568 | entries. If this instruction is a branch that we are going to swap |
| 6569 | with the previous instruction, the two instructions should be |
| 6570 | treated as a unit, and the debug information for both instructions |
| 6571 | should refer to the start of the branch sequence. Using the |
| 6572 | current position is certainly wrong when swapping a 32-bit branch |
| 6573 | and a 16-bit delay slot, since the current position would then be |
| 6574 | in the middle of a branch. */ |
| 6575 | dwarf2_move_insn ((HAVE_CODE_COMPRESSION ? 1 : 0) - branch_disp); |
| 6576 | |
| 6577 | relax32 = (mips_relax_branch |
| 6578 | /* Don't try branch relaxation within .set nomacro, or within |
| 6579 | .set noat if we use $at for PIC computations. If it turns |
| 6580 | out that the branch was out-of-range, we'll get an error. */ |
| 6581 | && !mips_opts.warn_about_macros |
| 6582 | && (mips_opts.at || mips_pic == NO_PIC) |
| 6583 | /* Don't relax BPOSGE32/64 or BC1ANY2T/F and BC1ANY4T/F |
| 6584 | as they have no complementing branches. */ |
| 6585 | && !(ip->insn_mo->ase & (ASE_MIPS3D | ASE_DSP64 | ASE_DSP))); |
| 6586 | |
| 6587 | if (!HAVE_CODE_COMPRESSION |
| 6588 | && address_expr |
| 6589 | && relax32 |
| 6590 | && *reloc_type == BFD_RELOC_16_PCREL_S2 |
| 6591 | && delayed_branch_p (ip)) |
| 6592 | { |
| 6593 | relaxed_branch = TRUE; |
| 6594 | add_relaxed_insn (ip, (relaxed_branch_length |
| 6595 | (NULL, NULL, |
| 6596 | uncond_branch_p (ip) ? -1 |
| 6597 | : branch_likely_p (ip) ? 1 |
| 6598 | : 0)), 4, |
| 6599 | RELAX_BRANCH_ENCODE |
| 6600 | (AT, |
| 6601 | uncond_branch_p (ip), |
| 6602 | branch_likely_p (ip), |
| 6603 | pinfo & INSN_WRITE_GPR_31, |
| 6604 | 0), |
| 6605 | address_expr->X_add_symbol, |
| 6606 | address_expr->X_add_number); |
| 6607 | *reloc_type = BFD_RELOC_UNUSED; |
| 6608 | } |
| 6609 | else if (mips_opts.micromips |
| 6610 | && address_expr |
| 6611 | && ((relax32 && *reloc_type == BFD_RELOC_16_PCREL_S2) |
| 6612 | || *reloc_type > BFD_RELOC_UNUSED) |
| 6613 | && (delayed_branch_p (ip) || compact_branch_p (ip)) |
| 6614 | /* Don't try branch relaxation when users specify |
| 6615 | 16-bit/32-bit instructions. */ |
| 6616 | && !forced_insn_length) |
| 6617 | { |
| 6618 | bfd_boolean relax16 = *reloc_type > BFD_RELOC_UNUSED; |
| 6619 | int type = relax16 ? *reloc_type - BFD_RELOC_UNUSED : 0; |
| 6620 | int uncond = uncond_branch_p (ip) ? -1 : 0; |
| 6621 | int compact = compact_branch_p (ip); |
| 6622 | int al = pinfo & INSN_WRITE_GPR_31; |
| 6623 | int length32; |
| 6624 | |
| 6625 | gas_assert (address_expr != NULL); |
| 6626 | gas_assert (!mips_relax.sequence); |
| 6627 | |
| 6628 | relaxed_branch = TRUE; |
| 6629 | length32 = relaxed_micromips_32bit_branch_length (NULL, NULL, uncond); |
| 6630 | add_relaxed_insn (ip, relax32 ? length32 : 4, relax16 ? 2 : 4, |
| 6631 | RELAX_MICROMIPS_ENCODE (type, AT, uncond, compact, al, |
| 6632 | relax32, 0, 0), |
| 6633 | address_expr->X_add_symbol, |
| 6634 | address_expr->X_add_number); |
| 6635 | *reloc_type = BFD_RELOC_UNUSED; |
| 6636 | } |
| 6637 | else if (mips_opts.mips16 && *reloc_type > BFD_RELOC_UNUSED) |
| 6638 | { |
| 6639 | /* We need to set up a variant frag. */ |
| 6640 | gas_assert (address_expr != NULL); |
| 6641 | add_relaxed_insn (ip, 4, 0, |
| 6642 | RELAX_MIPS16_ENCODE |
| 6643 | (*reloc_type - BFD_RELOC_UNUSED, |
| 6644 | forced_insn_length == 2, forced_insn_length == 4, |
| 6645 | delayed_branch_p (&history[0]), |
| 6646 | history[0].mips16_absolute_jump_p), |
| 6647 | make_expr_symbol (address_expr), 0); |
| 6648 | } |
| 6649 | else if (mips_opts.mips16 && insn_length (ip) == 2) |
| 6650 | { |
| 6651 | if (!delayed_branch_p (ip)) |
| 6652 | /* Make sure there is enough room to swap this instruction with |
| 6653 | a following jump instruction. */ |
| 6654 | frag_grow (6); |
| 6655 | add_fixed_insn (ip); |
| 6656 | } |
| 6657 | else |
| 6658 | { |
| 6659 | if (mips_opts.mips16 |
| 6660 | && mips_opts.noreorder |
| 6661 | && delayed_branch_p (&history[0])) |
| 6662 | as_warn (_("extended instruction in delay slot")); |
| 6663 | |
| 6664 | if (mips_relax.sequence) |
| 6665 | { |
| 6666 | /* If we've reached the end of this frag, turn it into a variant |
| 6667 | frag and record the information for the instructions we've |
| 6668 | written so far. */ |
| 6669 | if (frag_room () < 4) |
| 6670 | relax_close_frag (); |
| 6671 | mips_relax.sizes[mips_relax.sequence - 1] += insn_length (ip); |
| 6672 | } |
| 6673 | |
| 6674 | if (mips_relax.sequence != 2) |
| 6675 | { |
| 6676 | if (mips_macro_warning.first_insn_sizes[0] == 0) |
| 6677 | mips_macro_warning.first_insn_sizes[0] = insn_length (ip); |
| 6678 | mips_macro_warning.sizes[0] += insn_length (ip); |
| 6679 | mips_macro_warning.insns[0]++; |
| 6680 | } |
| 6681 | if (mips_relax.sequence != 1) |
| 6682 | { |
| 6683 | if (mips_macro_warning.first_insn_sizes[1] == 0) |
| 6684 | mips_macro_warning.first_insn_sizes[1] = insn_length (ip); |
| 6685 | mips_macro_warning.sizes[1] += insn_length (ip); |
| 6686 | mips_macro_warning.insns[1]++; |
| 6687 | } |
| 6688 | |
| 6689 | if (mips_opts.mips16) |
| 6690 | { |
| 6691 | ip->fixed_p = 1; |
| 6692 | ip->mips16_absolute_jump_p = (*reloc_type == BFD_RELOC_MIPS16_JMP); |
| 6693 | } |
| 6694 | add_fixed_insn (ip); |
| 6695 | } |
| 6696 | |
| 6697 | if (!ip->complete_p && *reloc_type < BFD_RELOC_UNUSED) |
| 6698 | { |
| 6699 | bfd_reloc_code_real_type final_type[3]; |
| 6700 | reloc_howto_type *howto0; |
| 6701 | reloc_howto_type *howto; |
| 6702 | int i; |
| 6703 | |
| 6704 | /* Perform any necessary conversion to microMIPS relocations |
| 6705 | and find out how many relocations there actually are. */ |
| 6706 | for (i = 0; i < 3 && reloc_type[i] != BFD_RELOC_UNUSED; i++) |
| 6707 | final_type[i] = micromips_map_reloc (reloc_type[i]); |
| 6708 | |
| 6709 | /* In a compound relocation, it is the final (outermost) |
| 6710 | operator that determines the relocated field. */ |
| 6711 | howto = howto0 = bfd_reloc_type_lookup (stdoutput, final_type[i - 1]); |
| 6712 | if (!howto) |
| 6713 | abort (); |
| 6714 | |
| 6715 | if (i > 1) |
| 6716 | howto0 = bfd_reloc_type_lookup (stdoutput, final_type[0]); |
| 6717 | ip->fixp[0] = fix_new_exp (ip->frag, ip->where, |
| 6718 | bfd_get_reloc_size (howto), |
| 6719 | address_expr, |
| 6720 | howto0 && howto0->pc_relative, |
| 6721 | final_type[0]); |
| 6722 | |
| 6723 | /* Tag symbols that have a R_MIPS16_26 relocation against them. */ |
| 6724 | if (final_type[0] == BFD_RELOC_MIPS16_JMP && ip->fixp[0]->fx_addsy) |
| 6725 | *symbol_get_tc (ip->fixp[0]->fx_addsy) = 1; |
| 6726 | |
| 6727 | /* These relocations can have an addend that won't fit in |
| 6728 | 4 octets for 64bit assembly. */ |
| 6729 | if (HAVE_64BIT_GPRS |
| 6730 | && ! howto->partial_inplace |
| 6731 | && (reloc_type[0] == BFD_RELOC_16 |
| 6732 | || reloc_type[0] == BFD_RELOC_32 |
| 6733 | || reloc_type[0] == BFD_RELOC_MIPS_JMP |
| 6734 | || reloc_type[0] == BFD_RELOC_GPREL16 |
| 6735 | || reloc_type[0] == BFD_RELOC_MIPS_LITERAL |
| 6736 | || reloc_type[0] == BFD_RELOC_GPREL32 |
| 6737 | || reloc_type[0] == BFD_RELOC_64 |
| 6738 | || reloc_type[0] == BFD_RELOC_CTOR |
| 6739 | || reloc_type[0] == BFD_RELOC_MIPS_SUB |
| 6740 | || reloc_type[0] == BFD_RELOC_MIPS_HIGHEST |
| 6741 | || reloc_type[0] == BFD_RELOC_MIPS_HIGHER |
| 6742 | || reloc_type[0] == BFD_RELOC_MIPS_SCN_DISP |
| 6743 | || reloc_type[0] == BFD_RELOC_MIPS_REL16 |
| 6744 | || reloc_type[0] == BFD_RELOC_MIPS_RELGOT |
| 6745 | || reloc_type[0] == BFD_RELOC_MIPS16_GPREL |
| 6746 | || hi16_reloc_p (reloc_type[0]) |
| 6747 | || lo16_reloc_p (reloc_type[0]))) |
| 6748 | ip->fixp[0]->fx_no_overflow = 1; |
| 6749 | |
| 6750 | /* These relocations can have an addend that won't fit in 2 octets. */ |
| 6751 | if (reloc_type[0] == BFD_RELOC_MICROMIPS_7_PCREL_S1 |
| 6752 | || reloc_type[0] == BFD_RELOC_MICROMIPS_10_PCREL_S1) |
| 6753 | ip->fixp[0]->fx_no_overflow = 1; |
| 6754 | |
| 6755 | if (mips_relax.sequence) |
| 6756 | { |
| 6757 | if (mips_relax.first_fixup == 0) |
| 6758 | mips_relax.first_fixup = ip->fixp[0]; |
| 6759 | } |
| 6760 | else if (reloc_needs_lo_p (*reloc_type)) |
| 6761 | { |
| 6762 | struct mips_hi_fixup *hi_fixup; |
| 6763 | |
| 6764 | /* Reuse the last entry if it already has a matching %lo. */ |
| 6765 | hi_fixup = mips_hi_fixup_list; |
| 6766 | if (hi_fixup == 0 |
| 6767 | || !fixup_has_matching_lo_p (hi_fixup->fixp)) |
| 6768 | { |
| 6769 | hi_fixup = ((struct mips_hi_fixup *) |
| 6770 | xmalloc (sizeof (struct mips_hi_fixup))); |
| 6771 | hi_fixup->next = mips_hi_fixup_list; |
| 6772 | mips_hi_fixup_list = hi_fixup; |
| 6773 | } |
| 6774 | hi_fixup->fixp = ip->fixp[0]; |
| 6775 | hi_fixup->seg = now_seg; |
| 6776 | } |
| 6777 | |
| 6778 | /* Add fixups for the second and third relocations, if given. |
| 6779 | Note that the ABI allows the second relocation to be |
| 6780 | against RSS_UNDEF, RSS_GP, RSS_GP0 or RSS_LOC. At the |
| 6781 | moment we only use RSS_UNDEF, but we could add support |
| 6782 | for the others if it ever becomes necessary. */ |
| 6783 | for (i = 1; i < 3; i++) |
| 6784 | if (reloc_type[i] != BFD_RELOC_UNUSED) |
| 6785 | { |
| 6786 | ip->fixp[i] = fix_new (ip->frag, ip->where, |
| 6787 | ip->fixp[0]->fx_size, NULL, 0, |
| 6788 | FALSE, final_type[i]); |
| 6789 | |
| 6790 | /* Use fx_tcbit to mark compound relocs. */ |
| 6791 | ip->fixp[0]->fx_tcbit = 1; |
| 6792 | ip->fixp[i]->fx_tcbit = 1; |
| 6793 | } |
| 6794 | } |
| 6795 | install_insn (ip); |
| 6796 | |
| 6797 | /* Update the register mask information. */ |
| 6798 | mips_gprmask |= gpr_read_mask (ip) | gpr_write_mask (ip); |
| 6799 | mips_cprmask[1] |= fpr_read_mask (ip) | fpr_write_mask (ip); |
| 6800 | |
| 6801 | switch (method) |
| 6802 | { |
| 6803 | case APPEND_ADD: |
| 6804 | insert_into_history (0, 1, ip); |
| 6805 | break; |
| 6806 | |
| 6807 | case APPEND_ADD_WITH_NOP: |
| 6808 | { |
| 6809 | struct mips_cl_insn *nop; |
| 6810 | |
| 6811 | insert_into_history (0, 1, ip); |
| 6812 | nop = get_delay_slot_nop (ip); |
| 6813 | add_fixed_insn (nop); |
| 6814 | insert_into_history (0, 1, nop); |
| 6815 | if (mips_relax.sequence) |
| 6816 | mips_relax.sizes[mips_relax.sequence - 1] += insn_length (nop); |
| 6817 | } |
| 6818 | break; |
| 6819 | |
| 6820 | case APPEND_ADD_COMPACT: |
| 6821 | /* Convert MIPS16 jr/jalr into a "compact" jump. */ |
| 6822 | gas_assert (mips_opts.mips16); |
| 6823 | ip->insn_opcode |= 0x0080; |
| 6824 | find_altered_mips16_opcode (ip); |
| 6825 | install_insn (ip); |
| 6826 | insert_into_history (0, 1, ip); |
| 6827 | break; |
| 6828 | |
| 6829 | case APPEND_SWAP: |
| 6830 | { |
| 6831 | struct mips_cl_insn delay = history[0]; |
| 6832 | if (mips_opts.mips16) |
| 6833 | { |
| 6834 | know (delay.frag == ip->frag); |
| 6835 | move_insn (ip, delay.frag, delay.where); |
| 6836 | move_insn (&delay, ip->frag, ip->where + insn_length (ip)); |
| 6837 | } |
| 6838 | else if (relaxed_branch || delay.frag != ip->frag) |
| 6839 | { |
| 6840 | /* Add the delay slot instruction to the end of the |
| 6841 | current frag and shrink the fixed part of the |
| 6842 | original frag. If the branch occupies the tail of |
| 6843 | the latter, move it backwards to cover the gap. */ |
| 6844 | delay.frag->fr_fix -= branch_disp; |
| 6845 | if (delay.frag == ip->frag) |
| 6846 | move_insn (ip, ip->frag, ip->where - branch_disp); |
| 6847 | add_fixed_insn (&delay); |
| 6848 | } |
| 6849 | else |
| 6850 | { |
| 6851 | move_insn (&delay, ip->frag, |
| 6852 | ip->where - branch_disp + insn_length (ip)); |
| 6853 | move_insn (ip, history[0].frag, history[0].where); |
| 6854 | } |
| 6855 | history[0] = *ip; |
| 6856 | delay.fixed_p = 1; |
| 6857 | insert_into_history (0, 1, &delay); |
| 6858 | } |
| 6859 | break; |
| 6860 | } |
| 6861 | |
| 6862 | /* If we have just completed an unconditional branch, clear the history. */ |
| 6863 | if ((delayed_branch_p (&history[1]) && uncond_branch_p (&history[1])) |
| 6864 | || (compact_branch_p (&history[0]) && uncond_branch_p (&history[0]))) |
| 6865 | { |
| 6866 | unsigned int i; |
| 6867 | |
| 6868 | mips_no_prev_insn (); |
| 6869 | |
| 6870 | for (i = 0; i < ARRAY_SIZE (history); i++) |
| 6871 | history[i].cleared_p = 1; |
| 6872 | } |
| 6873 | |
| 6874 | /* We need to emit a label at the end of branch-likely macros. */ |
| 6875 | if (emit_branch_likely_macro) |
| 6876 | { |
| 6877 | emit_branch_likely_macro = FALSE; |
| 6878 | micromips_add_label (); |
| 6879 | } |
| 6880 | |
| 6881 | /* We just output an insn, so the next one doesn't have a label. */ |
| 6882 | mips_clear_insn_labels (); |
| 6883 | } |
| 6884 | |
| 6885 | /* Forget that there was any previous instruction or label. |
| 6886 | When BRANCH is true, the branch history is also flushed. */ |
| 6887 | |
| 6888 | static void |
| 6889 | mips_no_prev_insn (void) |
| 6890 | { |
| 6891 | prev_nop_frag = NULL; |
| 6892 | insert_into_history (0, ARRAY_SIZE (history), NOP_INSN); |
| 6893 | mips_clear_insn_labels (); |
| 6894 | } |
| 6895 | |
| 6896 | /* This function must be called before we emit something other than |
| 6897 | instructions. It is like mips_no_prev_insn except that it inserts |
| 6898 | any NOPS that might be needed by previous instructions. */ |
| 6899 | |
| 6900 | void |
| 6901 | mips_emit_delays (void) |
| 6902 | { |
| 6903 | if (! mips_opts.noreorder) |
| 6904 | { |
| 6905 | int nops = nops_for_insn (0, history, NULL); |
| 6906 | if (nops > 0) |
| 6907 | { |
| 6908 | while (nops-- > 0) |
| 6909 | add_fixed_insn (NOP_INSN); |
| 6910 | mips_move_text_labels (); |
| 6911 | } |
| 6912 | } |
| 6913 | mips_no_prev_insn (); |
| 6914 | } |
| 6915 | |
| 6916 | /* Start a (possibly nested) noreorder block. */ |
| 6917 | |
| 6918 | static void |
| 6919 | start_noreorder (void) |
| 6920 | { |
| 6921 | if (mips_opts.noreorder == 0) |
| 6922 | { |
| 6923 | unsigned int i; |
| 6924 | int nops; |
| 6925 | |
| 6926 | /* None of the instructions before the .set noreorder can be moved. */ |
| 6927 | for (i = 0; i < ARRAY_SIZE (history); i++) |
| 6928 | history[i].fixed_p = 1; |
| 6929 | |
| 6930 | /* Insert any nops that might be needed between the .set noreorder |
| 6931 | block and the previous instructions. We will later remove any |
| 6932 | nops that turn out not to be needed. */ |
| 6933 | nops = nops_for_insn (0, history, NULL); |
| 6934 | if (nops > 0) |
| 6935 | { |
| 6936 | if (mips_optimize != 0) |
| 6937 | { |
| 6938 | /* Record the frag which holds the nop instructions, so |
| 6939 | that we can remove them if we don't need them. */ |
| 6940 | frag_grow (nops * NOP_INSN_SIZE); |
| 6941 | prev_nop_frag = frag_now; |
| 6942 | prev_nop_frag_holds = nops; |
| 6943 | prev_nop_frag_required = 0; |
| 6944 | prev_nop_frag_since = 0; |
| 6945 | } |
| 6946 | |
| 6947 | for (; nops > 0; --nops) |
| 6948 | add_fixed_insn (NOP_INSN); |
| 6949 | |
| 6950 | /* Move on to a new frag, so that it is safe to simply |
| 6951 | decrease the size of prev_nop_frag. */ |
| 6952 | frag_wane (frag_now); |
| 6953 | frag_new (0); |
| 6954 | mips_move_text_labels (); |
| 6955 | } |
| 6956 | mips_mark_labels (); |
| 6957 | mips_clear_insn_labels (); |
| 6958 | } |
| 6959 | mips_opts.noreorder++; |
| 6960 | mips_any_noreorder = 1; |
| 6961 | } |
| 6962 | |
| 6963 | /* End a nested noreorder block. */ |
| 6964 | |
| 6965 | static void |
| 6966 | end_noreorder (void) |
| 6967 | { |
| 6968 | mips_opts.noreorder--; |
| 6969 | if (mips_opts.noreorder == 0 && prev_nop_frag != NULL) |
| 6970 | { |
| 6971 | /* Commit to inserting prev_nop_frag_required nops and go back to |
| 6972 | handling nop insertion the .set reorder way. */ |
| 6973 | prev_nop_frag->fr_fix -= ((prev_nop_frag_holds - prev_nop_frag_required) |
| 6974 | * NOP_INSN_SIZE); |
| 6975 | insert_into_history (prev_nop_frag_since, |
| 6976 | prev_nop_frag_required, NOP_INSN); |
| 6977 | prev_nop_frag = NULL; |
| 6978 | } |
| 6979 | } |
| 6980 | |
| 6981 | /* Sign-extend 32-bit mode constants that have bit 31 set and all |
| 6982 | higher bits unset. */ |
| 6983 | |
| 6984 | static void |
| 6985 | normalize_constant_expr (expressionS *ex) |
| 6986 | { |
| 6987 | if (ex->X_op == O_constant |
| 6988 | && IS_ZEXT_32BIT_NUM (ex->X_add_number)) |
| 6989 | ex->X_add_number = (((ex->X_add_number & 0xffffffff) ^ 0x80000000) |
| 6990 | - 0x80000000); |
| 6991 | } |
| 6992 | |
| 6993 | /* Sign-extend 32-bit mode address offsets that have bit 31 set and |
| 6994 | all higher bits unset. */ |
| 6995 | |
| 6996 | static void |
| 6997 | normalize_address_expr (expressionS *ex) |
| 6998 | { |
| 6999 | if (((ex->X_op == O_constant && HAVE_32BIT_ADDRESSES) |
| 7000 | || (ex->X_op == O_symbol && HAVE_32BIT_SYMBOLS)) |
| 7001 | && IS_ZEXT_32BIT_NUM (ex->X_add_number)) |
| 7002 | ex->X_add_number = (((ex->X_add_number & 0xffffffff) ^ 0x80000000) |
| 7003 | - 0x80000000); |
| 7004 | } |
| 7005 | |
| 7006 | /* Try to match TOKENS against OPCODE, storing the result in INSN. |
| 7007 | Return true if the match was successful. |
| 7008 | |
| 7009 | OPCODE_EXTRA is a value that should be ORed into the opcode |
| 7010 | (used for VU0 channel suffixes, etc.). MORE_ALTS is true if |
| 7011 | there are more alternatives after OPCODE and SOFT_MATCH is |
| 7012 | as for mips_arg_info. */ |
| 7013 | |
| 7014 | static bfd_boolean |
| 7015 | match_insn (struct mips_cl_insn *insn, const struct mips_opcode *opcode, |
| 7016 | struct mips_operand_token *tokens, unsigned int opcode_extra, |
| 7017 | bfd_boolean lax_match, bfd_boolean complete_p) |
| 7018 | { |
| 7019 | const char *args; |
| 7020 | struct mips_arg_info arg; |
| 7021 | const struct mips_operand *operand; |
| 7022 | char c; |
| 7023 | |
| 7024 | imm_expr.X_op = O_absent; |
| 7025 | offset_expr.X_op = O_absent; |
| 7026 | offset_reloc[0] = BFD_RELOC_UNUSED; |
| 7027 | offset_reloc[1] = BFD_RELOC_UNUSED; |
| 7028 | offset_reloc[2] = BFD_RELOC_UNUSED; |
| 7029 | |
| 7030 | create_insn (insn, opcode); |
| 7031 | /* When no opcode suffix is specified, assume ".xyzw". */ |
| 7032 | if ((opcode->pinfo2 & INSN2_VU0_CHANNEL_SUFFIX) != 0 && opcode_extra == 0) |
| 7033 | insn->insn_opcode |= 0xf << mips_vu0_channel_mask.lsb; |
| 7034 | else |
| 7035 | insn->insn_opcode |= opcode_extra; |
| 7036 | memset (&arg, 0, sizeof (arg)); |
| 7037 | arg.insn = insn; |
| 7038 | arg.token = tokens; |
| 7039 | arg.argnum = 1; |
| 7040 | arg.last_regno = ILLEGAL_REG; |
| 7041 | arg.dest_regno = ILLEGAL_REG; |
| 7042 | arg.lax_match = lax_match; |
| 7043 | for (args = opcode->args;; ++args) |
| 7044 | { |
| 7045 | if (arg.token->type == OT_END) |
| 7046 | { |
| 7047 | /* Handle unary instructions in which only one operand is given. |
| 7048 | The source is then the same as the destination. */ |
| 7049 | if (arg.opnum == 1 && *args == ',') |
| 7050 | { |
| 7051 | operand = (mips_opts.micromips |
| 7052 | ? decode_micromips_operand (args + 1) |
| 7053 | : decode_mips_operand (args + 1)); |
| 7054 | if (operand && mips_optional_operand_p (operand)) |
| 7055 | { |
| 7056 | arg.token = tokens; |
| 7057 | arg.argnum = 1; |
| 7058 | continue; |
| 7059 | } |
| 7060 | } |
| 7061 | |
| 7062 | /* Treat elided base registers as $0. */ |
| 7063 | if (strcmp (args, "(b)") == 0) |
| 7064 | args += 3; |
| 7065 | |
| 7066 | if (args[0] == '+') |
| 7067 | switch (args[1]) |
| 7068 | { |
| 7069 | case 'K': |
| 7070 | case 'N': |
| 7071 | /* The register suffix is optional. */ |
| 7072 | args += 2; |
| 7073 | break; |
| 7074 | } |
| 7075 | |
| 7076 | /* Fail the match if there were too few operands. */ |
| 7077 | if (*args) |
| 7078 | return FALSE; |
| 7079 | |
| 7080 | /* Successful match. */ |
| 7081 | if (!complete_p) |
| 7082 | return TRUE; |
| 7083 | clear_insn_error (); |
| 7084 | if (arg.dest_regno == arg.last_regno |
| 7085 | && strncmp (insn->insn_mo->name, "jalr", 4) == 0) |
| 7086 | { |
| 7087 | if (arg.opnum == 2) |
| 7088 | set_insn_error |
| 7089 | (0, _("source and destination must be different")); |
| 7090 | else if (arg.last_regno == 31) |
| 7091 | set_insn_error |
| 7092 | (0, _("a destination register must be supplied")); |
| 7093 | } |
| 7094 | else if (arg.last_regno == 31 |
| 7095 | && (strncmp (insn->insn_mo->name, "bltzal", 6) == 0 |
| 7096 | || strncmp (insn->insn_mo->name, "bgezal", 6) == 0)) |
| 7097 | set_insn_error (0, _("the source register must not be $31")); |
| 7098 | check_completed_insn (&arg); |
| 7099 | return TRUE; |
| 7100 | } |
| 7101 | |
| 7102 | /* Fail the match if the line has too many operands. */ |
| 7103 | if (*args == 0) |
| 7104 | return FALSE; |
| 7105 | |
| 7106 | /* Handle characters that need to match exactly. */ |
| 7107 | if (*args == '(' || *args == ')' || *args == ',') |
| 7108 | { |
| 7109 | if (match_char (&arg, *args)) |
| 7110 | continue; |
| 7111 | return FALSE; |
| 7112 | } |
| 7113 | if (*args == '#') |
| 7114 | { |
| 7115 | ++args; |
| 7116 | if (arg.token->type == OT_DOUBLE_CHAR |
| 7117 | && arg.token->u.ch == *args) |
| 7118 | { |
| 7119 | ++arg.token; |
| 7120 | continue; |
| 7121 | } |
| 7122 | return FALSE; |
| 7123 | } |
| 7124 | |
| 7125 | /* Handle special macro operands. Work out the properties of |
| 7126 | other operands. */ |
| 7127 | arg.opnum += 1; |
| 7128 | switch (*args) |
| 7129 | { |
| 7130 | case '+': |
| 7131 | switch (args[1]) |
| 7132 | { |
| 7133 | case 'i': |
| 7134 | *offset_reloc = BFD_RELOC_MIPS_JMP; |
| 7135 | break; |
| 7136 | } |
| 7137 | break; |
| 7138 | |
| 7139 | case 'I': |
| 7140 | if (!match_const_int (&arg, &imm_expr.X_add_number)) |
| 7141 | return FALSE; |
| 7142 | imm_expr.X_op = O_constant; |
| 7143 | if (HAVE_32BIT_GPRS) |
| 7144 | normalize_constant_expr (&imm_expr); |
| 7145 | continue; |
| 7146 | |
| 7147 | case 'A': |
| 7148 | if (arg.token->type == OT_CHAR && arg.token->u.ch == '(') |
| 7149 | { |
| 7150 | /* Assume that the offset has been elided and that what |
| 7151 | we saw was a base register. The match will fail later |
| 7152 | if that assumption turns out to be wrong. */ |
| 7153 | offset_expr.X_op = O_constant; |
| 7154 | offset_expr.X_add_number = 0; |
| 7155 | } |
| 7156 | else |
| 7157 | { |
| 7158 | if (!match_expression (&arg, &offset_expr, offset_reloc)) |
| 7159 | return FALSE; |
| 7160 | normalize_address_expr (&offset_expr); |
| 7161 | } |
| 7162 | continue; |
| 7163 | |
| 7164 | case 'F': |
| 7165 | if (!match_float_constant (&arg, &imm_expr, &offset_expr, |
| 7166 | 8, TRUE)) |
| 7167 | return FALSE; |
| 7168 | continue; |
| 7169 | |
| 7170 | case 'L': |
| 7171 | if (!match_float_constant (&arg, &imm_expr, &offset_expr, |
| 7172 | 8, FALSE)) |
| 7173 | return FALSE; |
| 7174 | continue; |
| 7175 | |
| 7176 | case 'f': |
| 7177 | if (!match_float_constant (&arg, &imm_expr, &offset_expr, |
| 7178 | 4, TRUE)) |
| 7179 | return FALSE; |
| 7180 | continue; |
| 7181 | |
| 7182 | case 'l': |
| 7183 | if (!match_float_constant (&arg, &imm_expr, &offset_expr, |
| 7184 | 4, FALSE)) |
| 7185 | return FALSE; |
| 7186 | continue; |
| 7187 | |
| 7188 | case 'p': |
| 7189 | *offset_reloc = BFD_RELOC_16_PCREL_S2; |
| 7190 | break; |
| 7191 | |
| 7192 | case 'a': |
| 7193 | *offset_reloc = BFD_RELOC_MIPS_JMP; |
| 7194 | break; |
| 7195 | |
| 7196 | case 'm': |
| 7197 | gas_assert (mips_opts.micromips); |
| 7198 | c = args[1]; |
| 7199 | switch (c) |
| 7200 | { |
| 7201 | case 'D': |
| 7202 | case 'E': |
| 7203 | if (!forced_insn_length) |
| 7204 | *offset_reloc = (int) BFD_RELOC_UNUSED + c; |
| 7205 | else if (c == 'D') |
| 7206 | *offset_reloc = BFD_RELOC_MICROMIPS_10_PCREL_S1; |
| 7207 | else |
| 7208 | *offset_reloc = BFD_RELOC_MICROMIPS_7_PCREL_S1; |
| 7209 | break; |
| 7210 | } |
| 7211 | break; |
| 7212 | } |
| 7213 | |
| 7214 | operand = (mips_opts.micromips |
| 7215 | ? decode_micromips_operand (args) |
| 7216 | : decode_mips_operand (args)); |
| 7217 | if (!operand) |
| 7218 | abort (); |
| 7219 | |
| 7220 | /* Skip prefixes. */ |
| 7221 | if (*args == '+' || *args == 'm') |
| 7222 | args++; |
| 7223 | |
| 7224 | if (mips_optional_operand_p (operand) |
| 7225 | && args[1] == ',' |
| 7226 | && (arg.token[0].type != OT_REG |
| 7227 | || arg.token[1].type == OT_END)) |
| 7228 | { |
| 7229 | /* Assume that the register has been elided and is the |
| 7230 | same as the first operand. */ |
| 7231 | arg.token = tokens; |
| 7232 | arg.argnum = 1; |
| 7233 | } |
| 7234 | |
| 7235 | if (!match_operand (&arg, operand)) |
| 7236 | return FALSE; |
| 7237 | } |
| 7238 | } |
| 7239 | |
| 7240 | /* Like match_insn, but for MIPS16. */ |
| 7241 | |
| 7242 | static bfd_boolean |
| 7243 | match_mips16_insn (struct mips_cl_insn *insn, const struct mips_opcode *opcode, |
| 7244 | struct mips_operand_token *tokens) |
| 7245 | { |
| 7246 | const char *args; |
| 7247 | const struct mips_operand *operand; |
| 7248 | const struct mips_operand *ext_operand; |
| 7249 | struct mips_arg_info arg; |
| 7250 | int relax_char; |
| 7251 | |
| 7252 | create_insn (insn, opcode); |
| 7253 | imm_expr.X_op = O_absent; |
| 7254 | offset_expr.X_op = O_absent; |
| 7255 | offset_reloc[0] = BFD_RELOC_UNUSED; |
| 7256 | offset_reloc[1] = BFD_RELOC_UNUSED; |
| 7257 | offset_reloc[2] = BFD_RELOC_UNUSED; |
| 7258 | relax_char = 0; |
| 7259 | |
| 7260 | memset (&arg, 0, sizeof (arg)); |
| 7261 | arg.insn = insn; |
| 7262 | arg.token = tokens; |
| 7263 | arg.argnum = 1; |
| 7264 | arg.last_regno = ILLEGAL_REG; |
| 7265 | arg.dest_regno = ILLEGAL_REG; |
| 7266 | relax_char = 0; |
| 7267 | for (args = opcode->args;; ++args) |
| 7268 | { |
| 7269 | int c; |
| 7270 | |
| 7271 | if (arg.token->type == OT_END) |
| 7272 | { |
| 7273 | offsetT value; |
| 7274 | |
| 7275 | /* Handle unary instructions in which only one operand is given. |
| 7276 | The source is then the same as the destination. */ |
| 7277 | if (arg.opnum == 1 && *args == ',') |
| 7278 | { |
| 7279 | operand = decode_mips16_operand (args[1], FALSE); |
| 7280 | if (operand && mips_optional_operand_p (operand)) |
| 7281 | { |
| 7282 | arg.token = tokens; |
| 7283 | arg.argnum = 1; |
| 7284 | continue; |
| 7285 | } |
| 7286 | } |
| 7287 | |
| 7288 | /* Fail the match if there were too few operands. */ |
| 7289 | if (*args) |
| 7290 | return FALSE; |
| 7291 | |
| 7292 | /* Successful match. Stuff the immediate value in now, if |
| 7293 | we can. */ |
| 7294 | clear_insn_error (); |
| 7295 | if (opcode->pinfo == INSN_MACRO) |
| 7296 | { |
| 7297 | gas_assert (relax_char == 0 || relax_char == 'p'); |
| 7298 | gas_assert (*offset_reloc == BFD_RELOC_UNUSED); |
| 7299 | } |
| 7300 | else if (relax_char |
| 7301 | && offset_expr.X_op == O_constant |
| 7302 | && calculate_reloc (*offset_reloc, |
| 7303 | offset_expr.X_add_number, |
| 7304 | &value)) |
| 7305 | { |
| 7306 | mips16_immed (NULL, 0, relax_char, *offset_reloc, value, |
| 7307 | forced_insn_length, &insn->insn_opcode); |
| 7308 | offset_expr.X_op = O_absent; |
| 7309 | *offset_reloc = BFD_RELOC_UNUSED; |
| 7310 | } |
| 7311 | else if (relax_char && *offset_reloc != BFD_RELOC_UNUSED) |
| 7312 | { |
| 7313 | if (forced_insn_length == 2) |
| 7314 | set_insn_error (0, _("invalid unextended operand value")); |
| 7315 | forced_insn_length = 4; |
| 7316 | insn->insn_opcode |= MIPS16_EXTEND; |
| 7317 | } |
| 7318 | else if (relax_char) |
| 7319 | *offset_reloc = (int) BFD_RELOC_UNUSED + relax_char; |
| 7320 | |
| 7321 | check_completed_insn (&arg); |
| 7322 | return TRUE; |
| 7323 | } |
| 7324 | |
| 7325 | /* Fail the match if the line has too many operands. */ |
| 7326 | if (*args == 0) |
| 7327 | return FALSE; |
| 7328 | |
| 7329 | /* Handle characters that need to match exactly. */ |
| 7330 | if (*args == '(' || *args == ')' || *args == ',') |
| 7331 | { |
| 7332 | if (match_char (&arg, *args)) |
| 7333 | continue; |
| 7334 | return FALSE; |
| 7335 | } |
| 7336 | |
| 7337 | arg.opnum += 1; |
| 7338 | c = *args; |
| 7339 | switch (c) |
| 7340 | { |
| 7341 | case 'p': |
| 7342 | case 'q': |
| 7343 | case 'A': |
| 7344 | case 'B': |
| 7345 | case 'E': |
| 7346 | relax_char = c; |
| 7347 | break; |
| 7348 | |
| 7349 | case 'I': |
| 7350 | if (!match_const_int (&arg, &imm_expr.X_add_number)) |
| 7351 | return FALSE; |
| 7352 | imm_expr.X_op = O_constant; |
| 7353 | if (HAVE_32BIT_GPRS) |
| 7354 | normalize_constant_expr (&imm_expr); |
| 7355 | continue; |
| 7356 | |
| 7357 | case 'a': |
| 7358 | case 'i': |
| 7359 | *offset_reloc = BFD_RELOC_MIPS16_JMP; |
| 7360 | insn->insn_opcode <<= 16; |
| 7361 | break; |
| 7362 | } |
| 7363 | |
| 7364 | operand = decode_mips16_operand (c, FALSE); |
| 7365 | if (!operand) |
| 7366 | abort (); |
| 7367 | |
| 7368 | /* '6' is a special case. It is used for BREAK and SDBBP, |
| 7369 | whose operands are only meaningful to the software that decodes |
| 7370 | them. This means that there is no architectural reason why |
| 7371 | they cannot be prefixed by EXTEND, but in practice, |
| 7372 | exception handlers will only look at the instruction |
| 7373 | itself. We therefore allow '6' to be extended when |
| 7374 | disassembling but not when assembling. */ |
| 7375 | if (operand->type != OP_PCREL && c != '6') |
| 7376 | { |
| 7377 | ext_operand = decode_mips16_operand (c, TRUE); |
| 7378 | if (operand != ext_operand) |
| 7379 | { |
| 7380 | if (arg.token->type == OT_CHAR && arg.token->u.ch == '(') |
| 7381 | { |
| 7382 | offset_expr.X_op = O_constant; |
| 7383 | offset_expr.X_add_number = 0; |
| 7384 | relax_char = c; |
| 7385 | continue; |
| 7386 | } |
| 7387 | |
| 7388 | /* We need the OT_INTEGER check because some MIPS16 |
| 7389 | immediate variants are listed before the register ones. */ |
| 7390 | if (arg.token->type != OT_INTEGER |
| 7391 | || !match_expression (&arg, &offset_expr, offset_reloc)) |
| 7392 | return FALSE; |
| 7393 | |
| 7394 | /* '8' is used for SLTI(U) and has traditionally not |
| 7395 | been allowed to take relocation operators. */ |
| 7396 | if (offset_reloc[0] != BFD_RELOC_UNUSED |
| 7397 | && (ext_operand->size != 16 || c == '8')) |
| 7398 | return FALSE; |
| 7399 | |
| 7400 | relax_char = c; |
| 7401 | continue; |
| 7402 | } |
| 7403 | } |
| 7404 | |
| 7405 | if (mips_optional_operand_p (operand) |
| 7406 | && args[1] == ',' |
| 7407 | && (arg.token[0].type != OT_REG |
| 7408 | || arg.token[1].type == OT_END)) |
| 7409 | { |
| 7410 | /* Assume that the register has been elided and is the |
| 7411 | same as the first operand. */ |
| 7412 | arg.token = tokens; |
| 7413 | arg.argnum = 1; |
| 7414 | } |
| 7415 | |
| 7416 | if (!match_operand (&arg, operand)) |
| 7417 | return FALSE; |
| 7418 | } |
| 7419 | } |
| 7420 | |
| 7421 | /* Record that the current instruction is invalid for the current ISA. */ |
| 7422 | |
| 7423 | static void |
| 7424 | match_invalid_for_isa (void) |
| 7425 | { |
| 7426 | set_insn_error_ss |
| 7427 | (0, _("opcode not supported on this processor: %s (%s)"), |
| 7428 | mips_cpu_info_from_arch (mips_opts.arch)->name, |
| 7429 | mips_cpu_info_from_isa (mips_opts.isa)->name); |
| 7430 | } |
| 7431 | |
| 7432 | /* Try to match TOKENS against a series of opcode entries, starting at FIRST. |
| 7433 | Return true if a definite match or failure was found, storing any match |
| 7434 | in INSN. OPCODE_EXTRA is a value that should be ORed into the opcode |
| 7435 | (to handle things like VU0 suffixes). LAX_MATCH is true if we have already |
| 7436 | tried and failed to match under normal conditions and now want to try a |
| 7437 | more relaxed match. */ |
| 7438 | |
| 7439 | static bfd_boolean |
| 7440 | match_insns (struct mips_cl_insn *insn, const struct mips_opcode *first, |
| 7441 | const struct mips_opcode *past, struct mips_operand_token *tokens, |
| 7442 | int opcode_extra, bfd_boolean lax_match) |
| 7443 | { |
| 7444 | const struct mips_opcode *opcode; |
| 7445 | const struct mips_opcode *invalid_delay_slot; |
| 7446 | bfd_boolean seen_valid_for_isa, seen_valid_for_size; |
| 7447 | |
| 7448 | /* Search for a match, ignoring alternatives that don't satisfy the |
| 7449 | current ISA or forced_length. */ |
| 7450 | invalid_delay_slot = 0; |
| 7451 | seen_valid_for_isa = FALSE; |
| 7452 | seen_valid_for_size = FALSE; |
| 7453 | opcode = first; |
| 7454 | do |
| 7455 | { |
| 7456 | gas_assert (strcmp (opcode->name, first->name) == 0); |
| 7457 | if (is_opcode_valid (opcode)) |
| 7458 | { |
| 7459 | seen_valid_for_isa = TRUE; |
| 7460 | if (is_size_valid (opcode)) |
| 7461 | { |
| 7462 | bfd_boolean delay_slot_ok; |
| 7463 | |
| 7464 | seen_valid_for_size = TRUE; |
| 7465 | delay_slot_ok = is_delay_slot_valid (opcode); |
| 7466 | if (match_insn (insn, opcode, tokens, opcode_extra, |
| 7467 | lax_match, delay_slot_ok)) |
| 7468 | { |
| 7469 | if (!delay_slot_ok) |
| 7470 | { |
| 7471 | if (!invalid_delay_slot) |
| 7472 | invalid_delay_slot = opcode; |
| 7473 | } |
| 7474 | else |
| 7475 | return TRUE; |
| 7476 | } |
| 7477 | } |
| 7478 | } |
| 7479 | ++opcode; |
| 7480 | } |
| 7481 | while (opcode < past && strcmp (opcode->name, first->name) == 0); |
| 7482 | |
| 7483 | /* If the only matches we found had the wrong length for the delay slot, |
| 7484 | pick the first such match. We'll issue an appropriate warning later. */ |
| 7485 | if (invalid_delay_slot) |
| 7486 | { |
| 7487 | if (match_insn (insn, invalid_delay_slot, tokens, opcode_extra, |
| 7488 | lax_match, TRUE)) |
| 7489 | return TRUE; |
| 7490 | abort (); |
| 7491 | } |
| 7492 | |
| 7493 | /* Handle the case where we didn't try to match an instruction because |
| 7494 | all the alternatives were incompatible with the current ISA. */ |
| 7495 | if (!seen_valid_for_isa) |
| 7496 | { |
| 7497 | match_invalid_for_isa (); |
| 7498 | return TRUE; |
| 7499 | } |
| 7500 | |
| 7501 | /* Handle the case where we didn't try to match an instruction because |
| 7502 | all the alternatives were of the wrong size. */ |
| 7503 | if (!seen_valid_for_size) |
| 7504 | { |
| 7505 | if (mips_opts.insn32) |
| 7506 | set_insn_error (0, _("opcode not supported in the `insn32' mode")); |
| 7507 | else |
| 7508 | set_insn_error_i |
| 7509 | (0, _("unrecognized %d-bit version of microMIPS opcode"), |
| 7510 | 8 * forced_insn_length); |
| 7511 | return TRUE; |
| 7512 | } |
| 7513 | |
| 7514 | return FALSE; |
| 7515 | } |
| 7516 | |
| 7517 | /* Like match_insns, but for MIPS16. */ |
| 7518 | |
| 7519 | static bfd_boolean |
| 7520 | match_mips16_insns (struct mips_cl_insn *insn, const struct mips_opcode *first, |
| 7521 | struct mips_operand_token *tokens) |
| 7522 | { |
| 7523 | const struct mips_opcode *opcode; |
| 7524 | bfd_boolean seen_valid_for_isa; |
| 7525 | |
| 7526 | /* Search for a match, ignoring alternatives that don't satisfy the |
| 7527 | current ISA. There are no separate entries for extended forms so |
| 7528 | we deal with forced_length later. */ |
| 7529 | seen_valid_for_isa = FALSE; |
| 7530 | opcode = first; |
| 7531 | do |
| 7532 | { |
| 7533 | gas_assert (strcmp (opcode->name, first->name) == 0); |
| 7534 | if (is_opcode_valid_16 (opcode)) |
| 7535 | { |
| 7536 | seen_valid_for_isa = TRUE; |
| 7537 | if (match_mips16_insn (insn, opcode, tokens)) |
| 7538 | return TRUE; |
| 7539 | } |
| 7540 | ++opcode; |
| 7541 | } |
| 7542 | while (opcode < &mips16_opcodes[bfd_mips16_num_opcodes] |
| 7543 | && strcmp (opcode->name, first->name) == 0); |
| 7544 | |
| 7545 | /* Handle the case where we didn't try to match an instruction because |
| 7546 | all the alternatives were incompatible with the current ISA. */ |
| 7547 | if (!seen_valid_for_isa) |
| 7548 | { |
| 7549 | match_invalid_for_isa (); |
| 7550 | return TRUE; |
| 7551 | } |
| 7552 | |
| 7553 | return FALSE; |
| 7554 | } |
| 7555 | |
| 7556 | /* Set up global variables for the start of a new macro. */ |
| 7557 | |
| 7558 | static void |
| 7559 | macro_start (void) |
| 7560 | { |
| 7561 | memset (&mips_macro_warning.sizes, 0, sizeof (mips_macro_warning.sizes)); |
| 7562 | memset (&mips_macro_warning.first_insn_sizes, 0, |
| 7563 | sizeof (mips_macro_warning.first_insn_sizes)); |
| 7564 | memset (&mips_macro_warning.insns, 0, sizeof (mips_macro_warning.insns)); |
| 7565 | mips_macro_warning.delay_slot_p = (mips_opts.noreorder |
| 7566 | && delayed_branch_p (&history[0])); |
| 7567 | switch (history[0].insn_mo->pinfo2 |
| 7568 | & (INSN2_BRANCH_DELAY_32BIT | INSN2_BRANCH_DELAY_16BIT)) |
| 7569 | { |
| 7570 | case INSN2_BRANCH_DELAY_32BIT: |
| 7571 | mips_macro_warning.delay_slot_length = 4; |
| 7572 | break; |
| 7573 | case INSN2_BRANCH_DELAY_16BIT: |
| 7574 | mips_macro_warning.delay_slot_length = 2; |
| 7575 | break; |
| 7576 | default: |
| 7577 | mips_macro_warning.delay_slot_length = 0; |
| 7578 | break; |
| 7579 | } |
| 7580 | mips_macro_warning.first_frag = NULL; |
| 7581 | } |
| 7582 | |
| 7583 | /* Given that a macro is longer than one instruction or of the wrong size, |
| 7584 | return the appropriate warning for it. Return null if no warning is |
| 7585 | needed. SUBTYPE is a bitmask of RELAX_DELAY_SLOT, RELAX_DELAY_SLOT_16BIT, |
| 7586 | RELAX_DELAY_SLOT_SIZE_FIRST, RELAX_DELAY_SLOT_SIZE_SECOND, |
| 7587 | and RELAX_NOMACRO. */ |
| 7588 | |
| 7589 | static const char * |
| 7590 | macro_warning (relax_substateT subtype) |
| 7591 | { |
| 7592 | if (subtype & RELAX_DELAY_SLOT) |
| 7593 | return _("macro instruction expanded into multiple instructions" |
| 7594 | " in a branch delay slot"); |
| 7595 | else if (subtype & RELAX_NOMACRO) |
| 7596 | return _("macro instruction expanded into multiple instructions"); |
| 7597 | else if (subtype & (RELAX_DELAY_SLOT_SIZE_FIRST |
| 7598 | | RELAX_DELAY_SLOT_SIZE_SECOND)) |
| 7599 | return ((subtype & RELAX_DELAY_SLOT_16BIT) |
| 7600 | ? _("macro instruction expanded into a wrong size instruction" |
| 7601 | " in a 16-bit branch delay slot") |
| 7602 | : _("macro instruction expanded into a wrong size instruction" |
| 7603 | " in a 32-bit branch delay slot")); |
| 7604 | else |
| 7605 | return 0; |
| 7606 | } |
| 7607 | |
| 7608 | /* Finish up a macro. Emit warnings as appropriate. */ |
| 7609 | |
| 7610 | static void |
| 7611 | macro_end (void) |
| 7612 | { |
| 7613 | /* Relaxation warning flags. */ |
| 7614 | relax_substateT subtype = 0; |
| 7615 | |
| 7616 | /* Check delay slot size requirements. */ |
| 7617 | if (mips_macro_warning.delay_slot_length == 2) |
| 7618 | subtype |= RELAX_DELAY_SLOT_16BIT; |
| 7619 | if (mips_macro_warning.delay_slot_length != 0) |
| 7620 | { |
| 7621 | if (mips_macro_warning.delay_slot_length |
| 7622 | != mips_macro_warning.first_insn_sizes[0]) |
| 7623 | subtype |= RELAX_DELAY_SLOT_SIZE_FIRST; |
| 7624 | if (mips_macro_warning.delay_slot_length |
| 7625 | != mips_macro_warning.first_insn_sizes[1]) |
| 7626 | subtype |= RELAX_DELAY_SLOT_SIZE_SECOND; |
| 7627 | } |
| 7628 | |
| 7629 | /* Check instruction count requirements. */ |
| 7630 | if (mips_macro_warning.insns[0] > 1 || mips_macro_warning.insns[1] > 1) |
| 7631 | { |
| 7632 | if (mips_macro_warning.insns[1] > mips_macro_warning.insns[0]) |
| 7633 | subtype |= RELAX_SECOND_LONGER; |
| 7634 | if (mips_opts.warn_about_macros) |
| 7635 | subtype |= RELAX_NOMACRO; |
| 7636 | if (mips_macro_warning.delay_slot_p) |
| 7637 | subtype |= RELAX_DELAY_SLOT; |
| 7638 | } |
| 7639 | |
| 7640 | /* If both alternatives fail to fill a delay slot correctly, |
| 7641 | emit the warning now. */ |
| 7642 | if ((subtype & RELAX_DELAY_SLOT_SIZE_FIRST) != 0 |
| 7643 | && (subtype & RELAX_DELAY_SLOT_SIZE_SECOND) != 0) |
| 7644 | { |
| 7645 | relax_substateT s; |
| 7646 | const char *msg; |
| 7647 | |
| 7648 | s = subtype & (RELAX_DELAY_SLOT_16BIT |
| 7649 | | RELAX_DELAY_SLOT_SIZE_FIRST |
| 7650 | | RELAX_DELAY_SLOT_SIZE_SECOND); |
| 7651 | msg = macro_warning (s); |
| 7652 | if (msg != NULL) |
| 7653 | as_warn ("%s", msg); |
| 7654 | subtype &= ~s; |
| 7655 | } |
| 7656 | |
| 7657 | /* If both implementations are longer than 1 instruction, then emit the |
| 7658 | warning now. */ |
| 7659 | if (mips_macro_warning.insns[0] > 1 && mips_macro_warning.insns[1] > 1) |
| 7660 | { |
| 7661 | relax_substateT s; |
| 7662 | const char *msg; |
| 7663 | |
| 7664 | s = subtype & (RELAX_SECOND_LONGER | RELAX_NOMACRO | RELAX_DELAY_SLOT); |
| 7665 | msg = macro_warning (s); |
| 7666 | if (msg != NULL) |
| 7667 | as_warn ("%s", msg); |
| 7668 | subtype &= ~s; |
| 7669 | } |
| 7670 | |
| 7671 | /* If any flags still set, then one implementation might need a warning |
| 7672 | and the other either will need one of a different kind or none at all. |
| 7673 | Pass any remaining flags over to relaxation. */ |
| 7674 | if (mips_macro_warning.first_frag != NULL) |
| 7675 | mips_macro_warning.first_frag->fr_subtype |= subtype; |
| 7676 | } |
| 7677 | |
| 7678 | /* Instruction operand formats used in macros that vary between |
| 7679 | standard MIPS and microMIPS code. */ |
| 7680 | |
| 7681 | static const char * const brk_fmt[2][2] = { { "c", "c" }, { "mF", "c" } }; |
| 7682 | static const char * const cop12_fmt[2] = { "E,o(b)", "E,~(b)" }; |
| 7683 | static const char * const jalr_fmt[2] = { "d,s", "t,s" }; |
| 7684 | static const char * const lui_fmt[2] = { "t,u", "s,u" }; |
| 7685 | static const char * const mem12_fmt[2] = { "t,o(b)", "t,~(b)" }; |
| 7686 | static const char * const mfhl_fmt[2][2] = { { "d", "d" }, { "mj", "s" } }; |
| 7687 | static const char * const shft_fmt[2] = { "d,w,<", "t,r,<" }; |
| 7688 | static const char * const trap_fmt[2] = { "s,t,q", "s,t,|" }; |
| 7689 | |
| 7690 | #define BRK_FMT (brk_fmt[mips_opts.micromips][mips_opts.insn32]) |
| 7691 | #define COP12_FMT (cop12_fmt[mips_opts.micromips]) |
| 7692 | #define JALR_FMT (jalr_fmt[mips_opts.micromips]) |
| 7693 | #define LUI_FMT (lui_fmt[mips_opts.micromips]) |
| 7694 | #define MEM12_FMT (mem12_fmt[mips_opts.micromips]) |
| 7695 | #define MFHL_FMT (mfhl_fmt[mips_opts.micromips][mips_opts.insn32]) |
| 7696 | #define SHFT_FMT (shft_fmt[mips_opts.micromips]) |
| 7697 | #define TRAP_FMT (trap_fmt[mips_opts.micromips]) |
| 7698 | |
| 7699 | /* Read a macro's relocation codes from *ARGS and store them in *R. |
| 7700 | The first argument in *ARGS will be either the code for a single |
| 7701 | relocation or -1 followed by the three codes that make up a |
| 7702 | composite relocation. */ |
| 7703 | |
| 7704 | static void |
| 7705 | macro_read_relocs (va_list *args, bfd_reloc_code_real_type *r) |
| 7706 | { |
| 7707 | int i, next; |
| 7708 | |
| 7709 | next = va_arg (*args, int); |
| 7710 | if (next >= 0) |
| 7711 | r[0] = (bfd_reloc_code_real_type) next; |
| 7712 | else |
| 7713 | { |
| 7714 | for (i = 0; i < 3; i++) |
| 7715 | r[i] = (bfd_reloc_code_real_type) va_arg (*args, int); |
| 7716 | /* This function is only used for 16-bit relocation fields. |
| 7717 | To make the macro code simpler, treat an unrelocated value |
| 7718 | in the same way as BFD_RELOC_LO16. */ |
| 7719 | if (r[0] == BFD_RELOC_UNUSED) |
| 7720 | r[0] = BFD_RELOC_LO16; |
| 7721 | } |
| 7722 | } |
| 7723 | |
| 7724 | /* Build an instruction created by a macro expansion. This is passed |
| 7725 | a pointer to the count of instructions created so far, an |
| 7726 | expression, the name of the instruction to build, an operand format |
| 7727 | string, and corresponding arguments. */ |
| 7728 | |
| 7729 | static void |
| 7730 | macro_build (expressionS *ep, const char *name, const char *fmt, ...) |
| 7731 | { |
| 7732 | const struct mips_opcode *mo = NULL; |
| 7733 | bfd_reloc_code_real_type r[3]; |
| 7734 | const struct mips_opcode *amo; |
| 7735 | const struct mips_operand *operand; |
| 7736 | struct hash_control *hash; |
| 7737 | struct mips_cl_insn insn; |
| 7738 | va_list args; |
| 7739 | unsigned int uval; |
| 7740 | |
| 7741 | va_start (args, fmt); |
| 7742 | |
| 7743 | if (mips_opts.mips16) |
| 7744 | { |
| 7745 | mips16_macro_build (ep, name, fmt, &args); |
| 7746 | va_end (args); |
| 7747 | return; |
| 7748 | } |
| 7749 | |
| 7750 | r[0] = BFD_RELOC_UNUSED; |
| 7751 | r[1] = BFD_RELOC_UNUSED; |
| 7752 | r[2] = BFD_RELOC_UNUSED; |
| 7753 | hash = mips_opts.micromips ? micromips_op_hash : op_hash; |
| 7754 | amo = (struct mips_opcode *) hash_find (hash, name); |
| 7755 | gas_assert (amo); |
| 7756 | gas_assert (strcmp (name, amo->name) == 0); |
| 7757 | |
| 7758 | do |
| 7759 | { |
| 7760 | /* Search until we get a match for NAME. It is assumed here that |
| 7761 | macros will never generate MDMX, MIPS-3D, or MT instructions. |
| 7762 | We try to match an instruction that fulfils the branch delay |
| 7763 | slot instruction length requirement (if any) of the previous |
| 7764 | instruction. While doing this we record the first instruction |
| 7765 | seen that matches all the other conditions and use it anyway |
| 7766 | if the requirement cannot be met; we will issue an appropriate |
| 7767 | warning later on. */ |
| 7768 | if (strcmp (fmt, amo->args) == 0 |
| 7769 | && amo->pinfo != INSN_MACRO |
| 7770 | && is_opcode_valid (amo) |
| 7771 | && is_size_valid (amo)) |
| 7772 | { |
| 7773 | if (is_delay_slot_valid (amo)) |
| 7774 | { |
| 7775 | mo = amo; |
| 7776 | break; |
| 7777 | } |
| 7778 | else if (!mo) |
| 7779 | mo = amo; |
| 7780 | } |
| 7781 | |
| 7782 | ++amo; |
| 7783 | gas_assert (amo->name); |
| 7784 | } |
| 7785 | while (strcmp (name, amo->name) == 0); |
| 7786 | |
| 7787 | gas_assert (mo); |
| 7788 | create_insn (&insn, mo); |
| 7789 | for (; *fmt; ++fmt) |
| 7790 | { |
| 7791 | switch (*fmt) |
| 7792 | { |
| 7793 | case ',': |
| 7794 | case '(': |
| 7795 | case ')': |
| 7796 | case 'z': |
| 7797 | break; |
| 7798 | |
| 7799 | case 'i': |
| 7800 | case 'j': |
| 7801 | macro_read_relocs (&args, r); |
| 7802 | gas_assert (*r == BFD_RELOC_GPREL16 |
| 7803 | || *r == BFD_RELOC_MIPS_HIGHER |
| 7804 | || *r == BFD_RELOC_HI16_S |
| 7805 | || *r == BFD_RELOC_LO16 |
| 7806 | || *r == BFD_RELOC_MIPS_GOT_OFST); |
| 7807 | break; |
| 7808 | |
| 7809 | case 'o': |
| 7810 | macro_read_relocs (&args, r); |
| 7811 | break; |
| 7812 | |
| 7813 | case 'u': |
| 7814 | macro_read_relocs (&args, r); |
| 7815 | gas_assert (ep != NULL |
| 7816 | && (ep->X_op == O_constant |
| 7817 | || (ep->X_op == O_symbol |
| 7818 | && (*r == BFD_RELOC_MIPS_HIGHEST |
| 7819 | || *r == BFD_RELOC_HI16_S |
| 7820 | || *r == BFD_RELOC_HI16 |
| 7821 | || *r == BFD_RELOC_GPREL16 |
| 7822 | || *r == BFD_RELOC_MIPS_GOT_HI16 |
| 7823 | || *r == BFD_RELOC_MIPS_CALL_HI16)))); |
| 7824 | break; |
| 7825 | |
| 7826 | case 'p': |
| 7827 | gas_assert (ep != NULL); |
| 7828 | |
| 7829 | /* |
| 7830 | * This allows macro() to pass an immediate expression for |
| 7831 | * creating short branches without creating a symbol. |
| 7832 | * |
| 7833 | * We don't allow branch relaxation for these branches, as |
| 7834 | * they should only appear in ".set nomacro" anyway. |
| 7835 | */ |
| 7836 | if (ep->X_op == O_constant) |
| 7837 | { |
| 7838 | /* For microMIPS we always use relocations for branches. |
| 7839 | So we should not resolve immediate values. */ |
| 7840 | gas_assert (!mips_opts.micromips); |
| 7841 | |
| 7842 | if ((ep->X_add_number & 3) != 0) |
| 7843 | as_bad (_("branch to misaligned address (0x%lx)"), |
| 7844 | (unsigned long) ep->X_add_number); |
| 7845 | if ((ep->X_add_number + 0x20000) & ~0x3ffff) |
| 7846 | as_bad (_("branch address range overflow (0x%lx)"), |
| 7847 | (unsigned long) ep->X_add_number); |
| 7848 | insn.insn_opcode |= (ep->X_add_number >> 2) & 0xffff; |
| 7849 | ep = NULL; |
| 7850 | } |
| 7851 | else |
| 7852 | *r = BFD_RELOC_16_PCREL_S2; |
| 7853 | break; |
| 7854 | |
| 7855 | case 'a': |
| 7856 | gas_assert (ep != NULL); |
| 7857 | *r = BFD_RELOC_MIPS_JMP; |
| 7858 | break; |
| 7859 | |
| 7860 | default: |
| 7861 | operand = (mips_opts.micromips |
| 7862 | ? decode_micromips_operand (fmt) |
| 7863 | : decode_mips_operand (fmt)); |
| 7864 | if (!operand) |
| 7865 | abort (); |
| 7866 | |
| 7867 | uval = va_arg (args, int); |
| 7868 | if (operand->type == OP_CLO_CLZ_DEST) |
| 7869 | uval |= (uval << 5); |
| 7870 | insn_insert_operand (&insn, operand, uval); |
| 7871 | |
| 7872 | if (*fmt == '+' || *fmt == 'm') |
| 7873 | ++fmt; |
| 7874 | break; |
| 7875 | } |
| 7876 | } |
| 7877 | va_end (args); |
| 7878 | gas_assert (*r == BFD_RELOC_UNUSED ? ep == NULL : ep != NULL); |
| 7879 | |
| 7880 | append_insn (&insn, ep, r, TRUE); |
| 7881 | } |
| 7882 | |
| 7883 | static void |
| 7884 | mips16_macro_build (expressionS *ep, const char *name, const char *fmt, |
| 7885 | va_list *args) |
| 7886 | { |
| 7887 | struct mips_opcode *mo; |
| 7888 | struct mips_cl_insn insn; |
| 7889 | const struct mips_operand *operand; |
| 7890 | bfd_reloc_code_real_type r[3] |
| 7891 | = {BFD_RELOC_UNUSED, BFD_RELOC_UNUSED, BFD_RELOC_UNUSED}; |
| 7892 | |
| 7893 | mo = (struct mips_opcode *) hash_find (mips16_op_hash, name); |
| 7894 | gas_assert (mo); |
| 7895 | gas_assert (strcmp (name, mo->name) == 0); |
| 7896 | |
| 7897 | while (strcmp (fmt, mo->args) != 0 || mo->pinfo == INSN_MACRO) |
| 7898 | { |
| 7899 | ++mo; |
| 7900 | gas_assert (mo->name); |
| 7901 | gas_assert (strcmp (name, mo->name) == 0); |
| 7902 | } |
| 7903 | |
| 7904 | create_insn (&insn, mo); |
| 7905 | for (; *fmt; ++fmt) |
| 7906 | { |
| 7907 | int c; |
| 7908 | |
| 7909 | c = *fmt; |
| 7910 | switch (c) |
| 7911 | { |
| 7912 | case ',': |
| 7913 | case '(': |
| 7914 | case ')': |
| 7915 | break; |
| 7916 | |
| 7917 | case '0': |
| 7918 | case 'S': |
| 7919 | case 'P': |
| 7920 | case 'R': |
| 7921 | break; |
| 7922 | |
| 7923 | case '<': |
| 7924 | case '>': |
| 7925 | case '4': |
| 7926 | case '5': |
| 7927 | case 'H': |
| 7928 | case 'W': |
| 7929 | case 'D': |
| 7930 | case 'j': |
| 7931 | case '8': |
| 7932 | case 'V': |
| 7933 | case 'C': |
| 7934 | case 'U': |
| 7935 | case 'k': |
| 7936 | case 'K': |
| 7937 | case 'p': |
| 7938 | case 'q': |
| 7939 | { |
| 7940 | offsetT value; |
| 7941 | |
| 7942 | gas_assert (ep != NULL); |
| 7943 | |
| 7944 | if (ep->X_op != O_constant) |
| 7945 | *r = (int) BFD_RELOC_UNUSED + c; |
| 7946 | else if (calculate_reloc (*r, ep->X_add_number, &value)) |
| 7947 | { |
| 7948 | mips16_immed (NULL, 0, c, *r, value, 0, &insn.insn_opcode); |
| 7949 | ep = NULL; |
| 7950 | *r = BFD_RELOC_UNUSED; |
| 7951 | } |
| 7952 | } |
| 7953 | break; |
| 7954 | |
| 7955 | default: |
| 7956 | operand = decode_mips16_operand (c, FALSE); |
| 7957 | if (!operand) |
| 7958 | abort (); |
| 7959 | |
| 7960 | insn_insert_operand (&insn, operand, va_arg (*args, int)); |
| 7961 | break; |
| 7962 | } |
| 7963 | } |
| 7964 | |
| 7965 | gas_assert (*r == BFD_RELOC_UNUSED ? ep == NULL : ep != NULL); |
| 7966 | |
| 7967 | append_insn (&insn, ep, r, TRUE); |
| 7968 | } |
| 7969 | |
| 7970 | /* |
| 7971 | * Generate a "jalr" instruction with a relocation hint to the called |
| 7972 | * function. This occurs in NewABI PIC code. |
| 7973 | */ |
| 7974 | static void |
| 7975 | macro_build_jalr (expressionS *ep, int cprestore) |
| 7976 | { |
| 7977 | static const bfd_reloc_code_real_type jalr_relocs[2] |
| 7978 | = { BFD_RELOC_MIPS_JALR, BFD_RELOC_MICROMIPS_JALR }; |
| 7979 | bfd_reloc_code_real_type jalr_reloc = jalr_relocs[mips_opts.micromips]; |
| 7980 | const char *jalr; |
| 7981 | char *f = NULL; |
| 7982 | |
| 7983 | if (MIPS_JALR_HINT_P (ep)) |
| 7984 | { |
| 7985 | frag_grow (8); |
| 7986 | f = frag_more (0); |
| 7987 | } |
| 7988 | if (mips_opts.micromips) |
| 7989 | { |
| 7990 | jalr = ((mips_opts.noreorder && !cprestore) || mips_opts.insn32 |
| 7991 | ? "jalr" : "jalrs"); |
| 7992 | if (MIPS_JALR_HINT_P (ep) |
| 7993 | || mips_opts.insn32 |
| 7994 | || (history[0].insn_mo->pinfo2 & INSN2_BRANCH_DELAY_32BIT)) |
| 7995 | macro_build (NULL, jalr, "t,s", RA, PIC_CALL_REG); |
| 7996 | else |
| 7997 | macro_build (NULL, jalr, "mj", PIC_CALL_REG); |
| 7998 | } |
| 7999 | else |
| 8000 | macro_build (NULL, "jalr", "d,s", RA, PIC_CALL_REG); |
| 8001 | if (MIPS_JALR_HINT_P (ep)) |
| 8002 | fix_new_exp (frag_now, f - frag_now->fr_literal, 4, ep, FALSE, jalr_reloc); |
| 8003 | } |
| 8004 | |
| 8005 | /* |
| 8006 | * Generate a "lui" instruction. |
| 8007 | */ |
| 8008 | static void |
| 8009 | macro_build_lui (expressionS *ep, int regnum) |
| 8010 | { |
| 8011 | gas_assert (! mips_opts.mips16); |
| 8012 | |
| 8013 | if (ep->X_op != O_constant) |
| 8014 | { |
| 8015 | gas_assert (ep->X_op == O_symbol); |
| 8016 | /* _gp_disp is a special case, used from s_cpload. |
| 8017 | __gnu_local_gp is used if mips_no_shared. */ |
| 8018 | gas_assert (mips_pic == NO_PIC |
| 8019 | || (! HAVE_NEWABI |
| 8020 | && strcmp (S_GET_NAME (ep->X_add_symbol), "_gp_disp") == 0) |
| 8021 | || (! mips_in_shared |
| 8022 | && strcmp (S_GET_NAME (ep->X_add_symbol), |
| 8023 | "__gnu_local_gp") == 0)); |
| 8024 | } |
| 8025 | |
| 8026 | macro_build (ep, "lui", LUI_FMT, regnum, BFD_RELOC_HI16_S); |
| 8027 | } |
| 8028 | |
| 8029 | /* Generate a sequence of instructions to do a load or store from a constant |
| 8030 | offset off of a base register (breg) into/from a target register (treg), |
| 8031 | using AT if necessary. */ |
| 8032 | static void |
| 8033 | macro_build_ldst_constoffset (expressionS *ep, const char *op, |
| 8034 | int treg, int breg, int dbl) |
| 8035 | { |
| 8036 | gas_assert (ep->X_op == O_constant); |
| 8037 | |
| 8038 | /* Sign-extending 32-bit constants makes their handling easier. */ |
| 8039 | if (!dbl) |
| 8040 | normalize_constant_expr (ep); |
| 8041 | |
| 8042 | /* Right now, this routine can only handle signed 32-bit constants. */ |
| 8043 | if (! IS_SEXT_32BIT_NUM(ep->X_add_number + 0x8000)) |
| 8044 | as_warn (_("operand overflow")); |
| 8045 | |
| 8046 | if (IS_SEXT_16BIT_NUM(ep->X_add_number)) |
| 8047 | { |
| 8048 | /* Signed 16-bit offset will fit in the op. Easy! */ |
| 8049 | macro_build (ep, op, "t,o(b)", treg, BFD_RELOC_LO16, breg); |
| 8050 | } |
| 8051 | else |
| 8052 | { |
| 8053 | /* 32-bit offset, need multiple instructions and AT, like: |
| 8054 | lui $tempreg,const_hi (BFD_RELOC_HI16_S) |
| 8055 | addu $tempreg,$tempreg,$breg |
| 8056 | <op> $treg,const_lo($tempreg) (BFD_RELOC_LO16) |
| 8057 | to handle the complete offset. */ |
| 8058 | macro_build_lui (ep, AT); |
| 8059 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", AT, AT, breg); |
| 8060 | macro_build (ep, op, "t,o(b)", treg, BFD_RELOC_LO16, AT); |
| 8061 | |
| 8062 | if (!mips_opts.at) |
| 8063 | as_bad (_("macro used $at after \".set noat\"")); |
| 8064 | } |
| 8065 | } |
| 8066 | |
| 8067 | /* set_at() |
| 8068 | * Generates code to set the $at register to true (one) |
| 8069 | * if reg is less than the immediate expression. |
| 8070 | */ |
| 8071 | static void |
| 8072 | set_at (int reg, int unsignedp) |
| 8073 | { |
| 8074 | if (imm_expr.X_add_number >= -0x8000 |
| 8075 | && imm_expr.X_add_number < 0x8000) |
| 8076 | macro_build (&imm_expr, unsignedp ? "sltiu" : "slti", "t,r,j", |
| 8077 | AT, reg, BFD_RELOC_LO16); |
| 8078 | else |
| 8079 | { |
| 8080 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 8081 | macro_build (NULL, unsignedp ? "sltu" : "slt", "d,v,t", AT, reg, AT); |
| 8082 | } |
| 8083 | } |
| 8084 | |
| 8085 | /* Count the leading zeroes by performing a binary chop. This is a |
| 8086 | bulky bit of source, but performance is a LOT better for the |
| 8087 | majority of values than a simple loop to count the bits: |
| 8088 | for (lcnt = 0; (lcnt < 32); lcnt++) |
| 8089 | if ((v) & (1 << (31 - lcnt))) |
| 8090 | break; |
| 8091 | However it is not code size friendly, and the gain will drop a bit |
| 8092 | on certain cached systems. |
| 8093 | */ |
| 8094 | #define COUNT_TOP_ZEROES(v) \ |
| 8095 | (((v) & ~0xffff) == 0 \ |
| 8096 | ? ((v) & ~0xff) == 0 \ |
| 8097 | ? ((v) & ~0xf) == 0 \ |
| 8098 | ? ((v) & ~0x3) == 0 \ |
| 8099 | ? ((v) & ~0x1) == 0 \ |
| 8100 | ? !(v) \ |
| 8101 | ? 32 \ |
| 8102 | : 31 \ |
| 8103 | : 30 \ |
| 8104 | : ((v) & ~0x7) == 0 \ |
| 8105 | ? 29 \ |
| 8106 | : 28 \ |
| 8107 | : ((v) & ~0x3f) == 0 \ |
| 8108 | ? ((v) & ~0x1f) == 0 \ |
| 8109 | ? 27 \ |
| 8110 | : 26 \ |
| 8111 | : ((v) & ~0x7f) == 0 \ |
| 8112 | ? 25 \ |
| 8113 | : 24 \ |
| 8114 | : ((v) & ~0xfff) == 0 \ |
| 8115 | ? ((v) & ~0x3ff) == 0 \ |
| 8116 | ? ((v) & ~0x1ff) == 0 \ |
| 8117 | ? 23 \ |
| 8118 | : 22 \ |
| 8119 | : ((v) & ~0x7ff) == 0 \ |
| 8120 | ? 21 \ |
| 8121 | : 20 \ |
| 8122 | : ((v) & ~0x3fff) == 0 \ |
| 8123 | ? ((v) & ~0x1fff) == 0 \ |
| 8124 | ? 19 \ |
| 8125 | : 18 \ |
| 8126 | : ((v) & ~0x7fff) == 0 \ |
| 8127 | ? 17 \ |
| 8128 | : 16 \ |
| 8129 | : ((v) & ~0xffffff) == 0 \ |
| 8130 | ? ((v) & ~0xfffff) == 0 \ |
| 8131 | ? ((v) & ~0x3ffff) == 0 \ |
| 8132 | ? ((v) & ~0x1ffff) == 0 \ |
| 8133 | ? 15 \ |
| 8134 | : 14 \ |
| 8135 | : ((v) & ~0x7ffff) == 0 \ |
| 8136 | ? 13 \ |
| 8137 | : 12 \ |
| 8138 | : ((v) & ~0x3fffff) == 0 \ |
| 8139 | ? ((v) & ~0x1fffff) == 0 \ |
| 8140 | ? 11 \ |
| 8141 | : 10 \ |
| 8142 | : ((v) & ~0x7fffff) == 0 \ |
| 8143 | ? 9 \ |
| 8144 | : 8 \ |
| 8145 | : ((v) & ~0xfffffff) == 0 \ |
| 8146 | ? ((v) & ~0x3ffffff) == 0 \ |
| 8147 | ? ((v) & ~0x1ffffff) == 0 \ |
| 8148 | ? 7 \ |
| 8149 | : 6 \ |
| 8150 | : ((v) & ~0x7ffffff) == 0 \ |
| 8151 | ? 5 \ |
| 8152 | : 4 \ |
| 8153 | : ((v) & ~0x3fffffff) == 0 \ |
| 8154 | ? ((v) & ~0x1fffffff) == 0 \ |
| 8155 | ? 3 \ |
| 8156 | : 2 \ |
| 8157 | : ((v) & ~0x7fffffff) == 0 \ |
| 8158 | ? 1 \ |
| 8159 | : 0) |
| 8160 | |
| 8161 | /* load_register() |
| 8162 | * This routine generates the least number of instructions necessary to load |
| 8163 | * an absolute expression value into a register. |
| 8164 | */ |
| 8165 | static void |
| 8166 | load_register (int reg, expressionS *ep, int dbl) |
| 8167 | { |
| 8168 | int freg; |
| 8169 | expressionS hi32, lo32; |
| 8170 | |
| 8171 | if (ep->X_op != O_big) |
| 8172 | { |
| 8173 | gas_assert (ep->X_op == O_constant); |
| 8174 | |
| 8175 | /* Sign-extending 32-bit constants makes their handling easier. */ |
| 8176 | if (!dbl) |
| 8177 | normalize_constant_expr (ep); |
| 8178 | |
| 8179 | if (IS_SEXT_16BIT_NUM (ep->X_add_number)) |
| 8180 | { |
| 8181 | /* We can handle 16 bit signed values with an addiu to |
| 8182 | $zero. No need to ever use daddiu here, since $zero and |
| 8183 | the result are always correct in 32 bit mode. */ |
| 8184 | macro_build (ep, "addiu", "t,r,j", reg, 0, BFD_RELOC_LO16); |
| 8185 | return; |
| 8186 | } |
| 8187 | else if (ep->X_add_number >= 0 && ep->X_add_number < 0x10000) |
| 8188 | { |
| 8189 | /* We can handle 16 bit unsigned values with an ori to |
| 8190 | $zero. */ |
| 8191 | macro_build (ep, "ori", "t,r,i", reg, 0, BFD_RELOC_LO16); |
| 8192 | return; |
| 8193 | } |
| 8194 | else if ((IS_SEXT_32BIT_NUM (ep->X_add_number))) |
| 8195 | { |
| 8196 | /* 32 bit values require an lui. */ |
| 8197 | macro_build (ep, "lui", LUI_FMT, reg, BFD_RELOC_HI16); |
| 8198 | if ((ep->X_add_number & 0xffff) != 0) |
| 8199 | macro_build (ep, "ori", "t,r,i", reg, reg, BFD_RELOC_LO16); |
| 8200 | return; |
| 8201 | } |
| 8202 | } |
| 8203 | |
| 8204 | /* The value is larger than 32 bits. */ |
| 8205 | |
| 8206 | if (!dbl || HAVE_32BIT_GPRS) |
| 8207 | { |
| 8208 | char value[32]; |
| 8209 | |
| 8210 | sprintf_vma (value, ep->X_add_number); |
| 8211 | as_bad (_("number (0x%s) larger than 32 bits"), value); |
| 8212 | macro_build (ep, "addiu", "t,r,j", reg, 0, BFD_RELOC_LO16); |
| 8213 | return; |
| 8214 | } |
| 8215 | |
| 8216 | if (ep->X_op != O_big) |
| 8217 | { |
| 8218 | hi32 = *ep; |
| 8219 | hi32.X_add_number = (valueT) hi32.X_add_number >> 16; |
| 8220 | hi32.X_add_number = (valueT) hi32.X_add_number >> 16; |
| 8221 | hi32.X_add_number &= 0xffffffff; |
| 8222 | lo32 = *ep; |
| 8223 | lo32.X_add_number &= 0xffffffff; |
| 8224 | } |
| 8225 | else |
| 8226 | { |
| 8227 | gas_assert (ep->X_add_number > 2); |
| 8228 | if (ep->X_add_number == 3) |
| 8229 | generic_bignum[3] = 0; |
| 8230 | else if (ep->X_add_number > 4) |
| 8231 | as_bad (_("number larger than 64 bits")); |
| 8232 | lo32.X_op = O_constant; |
| 8233 | lo32.X_add_number = generic_bignum[0] + (generic_bignum[1] << 16); |
| 8234 | hi32.X_op = O_constant; |
| 8235 | hi32.X_add_number = generic_bignum[2] + (generic_bignum[3] << 16); |
| 8236 | } |
| 8237 | |
| 8238 | if (hi32.X_add_number == 0) |
| 8239 | freg = 0; |
| 8240 | else |
| 8241 | { |
| 8242 | int shift, bit; |
| 8243 | unsigned long hi, lo; |
| 8244 | |
| 8245 | if (hi32.X_add_number == (offsetT) 0xffffffff) |
| 8246 | { |
| 8247 | if ((lo32.X_add_number & 0xffff8000) == 0xffff8000) |
| 8248 | { |
| 8249 | macro_build (&lo32, "addiu", "t,r,j", reg, 0, BFD_RELOC_LO16); |
| 8250 | return; |
| 8251 | } |
| 8252 | if (lo32.X_add_number & 0x80000000) |
| 8253 | { |
| 8254 | macro_build (&lo32, "lui", LUI_FMT, reg, BFD_RELOC_HI16); |
| 8255 | if (lo32.X_add_number & 0xffff) |
| 8256 | macro_build (&lo32, "ori", "t,r,i", reg, reg, BFD_RELOC_LO16); |
| 8257 | return; |
| 8258 | } |
| 8259 | } |
| 8260 | |
| 8261 | /* Check for 16bit shifted constant. We know that hi32 is |
| 8262 | non-zero, so start the mask on the first bit of the hi32 |
| 8263 | value. */ |
| 8264 | shift = 17; |
| 8265 | do |
| 8266 | { |
| 8267 | unsigned long himask, lomask; |
| 8268 | |
| 8269 | if (shift < 32) |
| 8270 | { |
| 8271 | himask = 0xffff >> (32 - shift); |
| 8272 | lomask = (0xffff << shift) & 0xffffffff; |
| 8273 | } |
| 8274 | else |
| 8275 | { |
| 8276 | himask = 0xffff << (shift - 32); |
| 8277 | lomask = 0; |
| 8278 | } |
| 8279 | if ((hi32.X_add_number & ~(offsetT) himask) == 0 |
| 8280 | && (lo32.X_add_number & ~(offsetT) lomask) == 0) |
| 8281 | { |
| 8282 | expressionS tmp; |
| 8283 | |
| 8284 | tmp.X_op = O_constant; |
| 8285 | if (shift < 32) |
| 8286 | tmp.X_add_number = ((hi32.X_add_number << (32 - shift)) |
| 8287 | | (lo32.X_add_number >> shift)); |
| 8288 | else |
| 8289 | tmp.X_add_number = hi32.X_add_number >> (shift - 32); |
| 8290 | macro_build (&tmp, "ori", "t,r,i", reg, 0, BFD_RELOC_LO16); |
| 8291 | macro_build (NULL, (shift >= 32) ? "dsll32" : "dsll", SHFT_FMT, |
| 8292 | reg, reg, (shift >= 32) ? shift - 32 : shift); |
| 8293 | return; |
| 8294 | } |
| 8295 | ++shift; |
| 8296 | } |
| 8297 | while (shift <= (64 - 16)); |
| 8298 | |
| 8299 | /* Find the bit number of the lowest one bit, and store the |
| 8300 | shifted value in hi/lo. */ |
| 8301 | hi = (unsigned long) (hi32.X_add_number & 0xffffffff); |
| 8302 | lo = (unsigned long) (lo32.X_add_number & 0xffffffff); |
| 8303 | if (lo != 0) |
| 8304 | { |
| 8305 | bit = 0; |
| 8306 | while ((lo & 1) == 0) |
| 8307 | { |
| 8308 | lo >>= 1; |
| 8309 | ++bit; |
| 8310 | } |
| 8311 | lo |= (hi & (((unsigned long) 1 << bit) - 1)) << (32 - bit); |
| 8312 | hi >>= bit; |
| 8313 | } |
| 8314 | else |
| 8315 | { |
| 8316 | bit = 32; |
| 8317 | while ((hi & 1) == 0) |
| 8318 | { |
| 8319 | hi >>= 1; |
| 8320 | ++bit; |
| 8321 | } |
| 8322 | lo = hi; |
| 8323 | hi = 0; |
| 8324 | } |
| 8325 | |
| 8326 | /* Optimize if the shifted value is a (power of 2) - 1. */ |
| 8327 | if ((hi == 0 && ((lo + 1) & lo) == 0) |
| 8328 | || (lo == 0xffffffff && ((hi + 1) & hi) == 0)) |
| 8329 | { |
| 8330 | shift = COUNT_TOP_ZEROES ((unsigned int) hi32.X_add_number); |
| 8331 | if (shift != 0) |
| 8332 | { |
| 8333 | expressionS tmp; |
| 8334 | |
| 8335 | /* This instruction will set the register to be all |
| 8336 | ones. */ |
| 8337 | tmp.X_op = O_constant; |
| 8338 | tmp.X_add_number = (offsetT) -1; |
| 8339 | macro_build (&tmp, "addiu", "t,r,j", reg, 0, BFD_RELOC_LO16); |
| 8340 | if (bit != 0) |
| 8341 | { |
| 8342 | bit += shift; |
| 8343 | macro_build (NULL, (bit >= 32) ? "dsll32" : "dsll", SHFT_FMT, |
| 8344 | reg, reg, (bit >= 32) ? bit - 32 : bit); |
| 8345 | } |
| 8346 | macro_build (NULL, (shift >= 32) ? "dsrl32" : "dsrl", SHFT_FMT, |
| 8347 | reg, reg, (shift >= 32) ? shift - 32 : shift); |
| 8348 | return; |
| 8349 | } |
| 8350 | } |
| 8351 | |
| 8352 | /* Sign extend hi32 before calling load_register, because we can |
| 8353 | generally get better code when we load a sign extended value. */ |
| 8354 | if ((hi32.X_add_number & 0x80000000) != 0) |
| 8355 | hi32.X_add_number |= ~(offsetT) 0xffffffff; |
| 8356 | load_register (reg, &hi32, 0); |
| 8357 | freg = reg; |
| 8358 | } |
| 8359 | if ((lo32.X_add_number & 0xffff0000) == 0) |
| 8360 | { |
| 8361 | if (freg != 0) |
| 8362 | { |
| 8363 | macro_build (NULL, "dsll32", SHFT_FMT, reg, freg, 0); |
| 8364 | freg = reg; |
| 8365 | } |
| 8366 | } |
| 8367 | else |
| 8368 | { |
| 8369 | expressionS mid16; |
| 8370 | |
| 8371 | if ((freg == 0) && (lo32.X_add_number == (offsetT) 0xffffffff)) |
| 8372 | { |
| 8373 | macro_build (&lo32, "lui", LUI_FMT, reg, BFD_RELOC_HI16); |
| 8374 | macro_build (NULL, "dsrl32", SHFT_FMT, reg, reg, 0); |
| 8375 | return; |
| 8376 | } |
| 8377 | |
| 8378 | if (freg != 0) |
| 8379 | { |
| 8380 | macro_build (NULL, "dsll", SHFT_FMT, reg, freg, 16); |
| 8381 | freg = reg; |
| 8382 | } |
| 8383 | mid16 = lo32; |
| 8384 | mid16.X_add_number >>= 16; |
| 8385 | macro_build (&mid16, "ori", "t,r,i", reg, freg, BFD_RELOC_LO16); |
| 8386 | macro_build (NULL, "dsll", SHFT_FMT, reg, reg, 16); |
| 8387 | freg = reg; |
| 8388 | } |
| 8389 | if ((lo32.X_add_number & 0xffff) != 0) |
| 8390 | macro_build (&lo32, "ori", "t,r,i", reg, freg, BFD_RELOC_LO16); |
| 8391 | } |
| 8392 | |
| 8393 | static inline void |
| 8394 | load_delay_nop (void) |
| 8395 | { |
| 8396 | if (!gpr_interlocks) |
| 8397 | macro_build (NULL, "nop", ""); |
| 8398 | } |
| 8399 | |
| 8400 | /* Load an address into a register. */ |
| 8401 | |
| 8402 | static void |
| 8403 | load_address (int reg, expressionS *ep, int *used_at) |
| 8404 | { |
| 8405 | if (ep->X_op != O_constant |
| 8406 | && ep->X_op != O_symbol) |
| 8407 | { |
| 8408 | as_bad (_("expression too complex")); |
| 8409 | ep->X_op = O_constant; |
| 8410 | } |
| 8411 | |
| 8412 | if (ep->X_op == O_constant) |
| 8413 | { |
| 8414 | load_register (reg, ep, HAVE_64BIT_ADDRESSES); |
| 8415 | return; |
| 8416 | } |
| 8417 | |
| 8418 | if (mips_pic == NO_PIC) |
| 8419 | { |
| 8420 | /* If this is a reference to a GP relative symbol, we want |
| 8421 | addiu $reg,$gp,<sym> (BFD_RELOC_GPREL16) |
| 8422 | Otherwise we want |
| 8423 | lui $reg,<sym> (BFD_RELOC_HI16_S) |
| 8424 | addiu $reg,$reg,<sym> (BFD_RELOC_LO16) |
| 8425 | If we have an addend, we always use the latter form. |
| 8426 | |
| 8427 | With 64bit address space and a usable $at we want |
| 8428 | lui $reg,<sym> (BFD_RELOC_MIPS_HIGHEST) |
| 8429 | lui $at,<sym> (BFD_RELOC_HI16_S) |
| 8430 | daddiu $reg,<sym> (BFD_RELOC_MIPS_HIGHER) |
| 8431 | daddiu $at,<sym> (BFD_RELOC_LO16) |
| 8432 | dsll32 $reg,0 |
| 8433 | daddu $reg,$reg,$at |
| 8434 | |
| 8435 | If $at is already in use, we use a path which is suboptimal |
| 8436 | on superscalar processors. |
| 8437 | lui $reg,<sym> (BFD_RELOC_MIPS_HIGHEST) |
| 8438 | daddiu $reg,<sym> (BFD_RELOC_MIPS_HIGHER) |
| 8439 | dsll $reg,16 |
| 8440 | daddiu $reg,<sym> (BFD_RELOC_HI16_S) |
| 8441 | dsll $reg,16 |
| 8442 | daddiu $reg,<sym> (BFD_RELOC_LO16) |
| 8443 | |
| 8444 | For GP relative symbols in 64bit address space we can use |
| 8445 | the same sequence as in 32bit address space. */ |
| 8446 | if (HAVE_64BIT_SYMBOLS) |
| 8447 | { |
| 8448 | if ((valueT) ep->X_add_number <= MAX_GPREL_OFFSET |
| 8449 | && !nopic_need_relax (ep->X_add_symbol, 1)) |
| 8450 | { |
| 8451 | relax_start (ep->X_add_symbol); |
| 8452 | macro_build (ep, ADDRESS_ADDI_INSN, "t,r,j", reg, |
| 8453 | mips_gp_register, BFD_RELOC_GPREL16); |
| 8454 | relax_switch (); |
| 8455 | } |
| 8456 | |
| 8457 | if (*used_at == 0 && mips_opts.at) |
| 8458 | { |
| 8459 | macro_build (ep, "lui", LUI_FMT, reg, BFD_RELOC_MIPS_HIGHEST); |
| 8460 | macro_build (ep, "lui", LUI_FMT, AT, BFD_RELOC_HI16_S); |
| 8461 | macro_build (ep, "daddiu", "t,r,j", reg, reg, |
| 8462 | BFD_RELOC_MIPS_HIGHER); |
| 8463 | macro_build (ep, "daddiu", "t,r,j", AT, AT, BFD_RELOC_LO16); |
| 8464 | macro_build (NULL, "dsll32", SHFT_FMT, reg, reg, 0); |
| 8465 | macro_build (NULL, "daddu", "d,v,t", reg, reg, AT); |
| 8466 | *used_at = 1; |
| 8467 | } |
| 8468 | else |
| 8469 | { |
| 8470 | macro_build (ep, "lui", LUI_FMT, reg, BFD_RELOC_MIPS_HIGHEST); |
| 8471 | macro_build (ep, "daddiu", "t,r,j", reg, reg, |
| 8472 | BFD_RELOC_MIPS_HIGHER); |
| 8473 | macro_build (NULL, "dsll", SHFT_FMT, reg, reg, 16); |
| 8474 | macro_build (ep, "daddiu", "t,r,j", reg, reg, BFD_RELOC_HI16_S); |
| 8475 | macro_build (NULL, "dsll", SHFT_FMT, reg, reg, 16); |
| 8476 | macro_build (ep, "daddiu", "t,r,j", reg, reg, BFD_RELOC_LO16); |
| 8477 | } |
| 8478 | |
| 8479 | if (mips_relax.sequence) |
| 8480 | relax_end (); |
| 8481 | } |
| 8482 | else |
| 8483 | { |
| 8484 | if ((valueT) ep->X_add_number <= MAX_GPREL_OFFSET |
| 8485 | && !nopic_need_relax (ep->X_add_symbol, 1)) |
| 8486 | { |
| 8487 | relax_start (ep->X_add_symbol); |
| 8488 | macro_build (ep, ADDRESS_ADDI_INSN, "t,r,j", reg, |
| 8489 | mips_gp_register, BFD_RELOC_GPREL16); |
| 8490 | relax_switch (); |
| 8491 | } |
| 8492 | macro_build_lui (ep, reg); |
| 8493 | macro_build (ep, ADDRESS_ADDI_INSN, "t,r,j", |
| 8494 | reg, reg, BFD_RELOC_LO16); |
| 8495 | if (mips_relax.sequence) |
| 8496 | relax_end (); |
| 8497 | } |
| 8498 | } |
| 8499 | else if (!mips_big_got) |
| 8500 | { |
| 8501 | expressionS ex; |
| 8502 | |
| 8503 | /* If this is a reference to an external symbol, we want |
| 8504 | lw $reg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 8505 | Otherwise we want |
| 8506 | lw $reg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 8507 | nop |
| 8508 | addiu $reg,$reg,<sym> (BFD_RELOC_LO16) |
| 8509 | If there is a constant, it must be added in after. |
| 8510 | |
| 8511 | If we have NewABI, we want |
| 8512 | lw $reg,<sym+cst>($gp) (BFD_RELOC_MIPS_GOT_DISP) |
| 8513 | unless we're referencing a global symbol with a non-zero |
| 8514 | offset, in which case cst must be added separately. */ |
| 8515 | if (HAVE_NEWABI) |
| 8516 | { |
| 8517 | if (ep->X_add_number) |
| 8518 | { |
| 8519 | ex.X_add_number = ep->X_add_number; |
| 8520 | ep->X_add_number = 0; |
| 8521 | relax_start (ep->X_add_symbol); |
| 8522 | macro_build (ep, ADDRESS_LOAD_INSN, "t,o(b)", reg, |
| 8523 | BFD_RELOC_MIPS_GOT_DISP, mips_gp_register); |
| 8524 | if (ex.X_add_number < -0x8000 || ex.X_add_number >= 0x8000) |
| 8525 | as_bad (_("PIC code offset overflow (max 16 signed bits)")); |
| 8526 | ex.X_op = O_constant; |
| 8527 | macro_build (&ex, ADDRESS_ADDI_INSN, "t,r,j", |
| 8528 | reg, reg, BFD_RELOC_LO16); |
| 8529 | ep->X_add_number = ex.X_add_number; |
| 8530 | relax_switch (); |
| 8531 | } |
| 8532 | macro_build (ep, ADDRESS_LOAD_INSN, "t,o(b)", reg, |
| 8533 | BFD_RELOC_MIPS_GOT_DISP, mips_gp_register); |
| 8534 | if (mips_relax.sequence) |
| 8535 | relax_end (); |
| 8536 | } |
| 8537 | else |
| 8538 | { |
| 8539 | ex.X_add_number = ep->X_add_number; |
| 8540 | ep->X_add_number = 0; |
| 8541 | macro_build (ep, ADDRESS_LOAD_INSN, "t,o(b)", reg, |
| 8542 | BFD_RELOC_MIPS_GOT16, mips_gp_register); |
| 8543 | load_delay_nop (); |
| 8544 | relax_start (ep->X_add_symbol); |
| 8545 | relax_switch (); |
| 8546 | macro_build (ep, ADDRESS_ADDI_INSN, "t,r,j", reg, reg, |
| 8547 | BFD_RELOC_LO16); |
| 8548 | relax_end (); |
| 8549 | |
| 8550 | if (ex.X_add_number != 0) |
| 8551 | { |
| 8552 | if (ex.X_add_number < -0x8000 || ex.X_add_number >= 0x8000) |
| 8553 | as_bad (_("PIC code offset overflow (max 16 signed bits)")); |
| 8554 | ex.X_op = O_constant; |
| 8555 | macro_build (&ex, ADDRESS_ADDI_INSN, "t,r,j", |
| 8556 | reg, reg, BFD_RELOC_LO16); |
| 8557 | } |
| 8558 | } |
| 8559 | } |
| 8560 | else if (mips_big_got) |
| 8561 | { |
| 8562 | expressionS ex; |
| 8563 | |
| 8564 | /* This is the large GOT case. If this is a reference to an |
| 8565 | external symbol, we want |
| 8566 | lui $reg,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 8567 | addu $reg,$reg,$gp |
| 8568 | lw $reg,<sym>($reg) (BFD_RELOC_MIPS_GOT_LO16) |
| 8569 | |
| 8570 | Otherwise, for a reference to a local symbol in old ABI, we want |
| 8571 | lw $reg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 8572 | nop |
| 8573 | addiu $reg,$reg,<sym> (BFD_RELOC_LO16) |
| 8574 | If there is a constant, it must be added in after. |
| 8575 | |
| 8576 | In the NewABI, for local symbols, with or without offsets, we want: |
| 8577 | lw $reg,<sym>($gp) (BFD_RELOC_MIPS_GOT_PAGE) |
| 8578 | addiu $reg,$reg,<sym> (BFD_RELOC_MIPS_GOT_OFST) |
| 8579 | */ |
| 8580 | if (HAVE_NEWABI) |
| 8581 | { |
| 8582 | ex.X_add_number = ep->X_add_number; |
| 8583 | ep->X_add_number = 0; |
| 8584 | relax_start (ep->X_add_symbol); |
| 8585 | macro_build (ep, "lui", LUI_FMT, reg, BFD_RELOC_MIPS_GOT_HI16); |
| 8586 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 8587 | reg, reg, mips_gp_register); |
| 8588 | macro_build (ep, ADDRESS_LOAD_INSN, "t,o(b)", |
| 8589 | reg, BFD_RELOC_MIPS_GOT_LO16, reg); |
| 8590 | if (ex.X_add_number < -0x8000 || ex.X_add_number >= 0x8000) |
| 8591 | as_bad (_("PIC code offset overflow (max 16 signed bits)")); |
| 8592 | else if (ex.X_add_number) |
| 8593 | { |
| 8594 | ex.X_op = O_constant; |
| 8595 | macro_build (&ex, ADDRESS_ADDI_INSN, "t,r,j", reg, reg, |
| 8596 | BFD_RELOC_LO16); |
| 8597 | } |
| 8598 | |
| 8599 | ep->X_add_number = ex.X_add_number; |
| 8600 | relax_switch (); |
| 8601 | macro_build (ep, ADDRESS_LOAD_INSN, "t,o(b)", reg, |
| 8602 | BFD_RELOC_MIPS_GOT_PAGE, mips_gp_register); |
| 8603 | macro_build (ep, ADDRESS_ADDI_INSN, "t,r,j", reg, reg, |
| 8604 | BFD_RELOC_MIPS_GOT_OFST); |
| 8605 | relax_end (); |
| 8606 | } |
| 8607 | else |
| 8608 | { |
| 8609 | ex.X_add_number = ep->X_add_number; |
| 8610 | ep->X_add_number = 0; |
| 8611 | relax_start (ep->X_add_symbol); |
| 8612 | macro_build (ep, "lui", LUI_FMT, reg, BFD_RELOC_MIPS_GOT_HI16); |
| 8613 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 8614 | reg, reg, mips_gp_register); |
| 8615 | macro_build (ep, ADDRESS_LOAD_INSN, "t,o(b)", |
| 8616 | reg, BFD_RELOC_MIPS_GOT_LO16, reg); |
| 8617 | relax_switch (); |
| 8618 | if (reg_needs_delay (mips_gp_register)) |
| 8619 | { |
| 8620 | /* We need a nop before loading from $gp. This special |
| 8621 | check is required because the lui which starts the main |
| 8622 | instruction stream does not refer to $gp, and so will not |
| 8623 | insert the nop which may be required. */ |
| 8624 | macro_build (NULL, "nop", ""); |
| 8625 | } |
| 8626 | macro_build (ep, ADDRESS_LOAD_INSN, "t,o(b)", reg, |
| 8627 | BFD_RELOC_MIPS_GOT16, mips_gp_register); |
| 8628 | load_delay_nop (); |
| 8629 | macro_build (ep, ADDRESS_ADDI_INSN, "t,r,j", reg, reg, |
| 8630 | BFD_RELOC_LO16); |
| 8631 | relax_end (); |
| 8632 | |
| 8633 | if (ex.X_add_number != 0) |
| 8634 | { |
| 8635 | if (ex.X_add_number < -0x8000 || ex.X_add_number >= 0x8000) |
| 8636 | as_bad (_("PIC code offset overflow (max 16 signed bits)")); |
| 8637 | ex.X_op = O_constant; |
| 8638 | macro_build (&ex, ADDRESS_ADDI_INSN, "t,r,j", reg, reg, |
| 8639 | BFD_RELOC_LO16); |
| 8640 | } |
| 8641 | } |
| 8642 | } |
| 8643 | else |
| 8644 | abort (); |
| 8645 | |
| 8646 | if (!mips_opts.at && *used_at == 1) |
| 8647 | as_bad (_("macro used $at after \".set noat\"")); |
| 8648 | } |
| 8649 | |
| 8650 | /* Move the contents of register SOURCE into register DEST. */ |
| 8651 | |
| 8652 | static void |
| 8653 | move_register (int dest, int source) |
| 8654 | { |
| 8655 | /* Prefer to use a 16-bit microMIPS instruction unless the previous |
| 8656 | instruction specifically requires a 32-bit one. */ |
| 8657 | if (mips_opts.micromips |
| 8658 | && !mips_opts.insn32 |
| 8659 | && !(history[0].insn_mo->pinfo2 & INSN2_BRANCH_DELAY_32BIT)) |
| 8660 | macro_build (NULL, "move", "mp,mj", dest, source); |
| 8661 | else |
| 8662 | macro_build (NULL, HAVE_32BIT_GPRS ? "addu" : "daddu", "d,v,t", |
| 8663 | dest, source, 0); |
| 8664 | } |
| 8665 | |
| 8666 | /* Emit an SVR4 PIC sequence to load address LOCAL into DEST, where |
| 8667 | LOCAL is the sum of a symbol and a 16-bit or 32-bit displacement. |
| 8668 | The two alternatives are: |
| 8669 | |
| 8670 | Global symbol Local sybmol |
| 8671 | ------------- ------------ |
| 8672 | lw DEST,%got(SYMBOL) lw DEST,%got(SYMBOL + OFFSET) |
| 8673 | ... ... |
| 8674 | addiu DEST,DEST,OFFSET addiu DEST,DEST,%lo(SYMBOL + OFFSET) |
| 8675 | |
| 8676 | load_got_offset emits the first instruction and add_got_offset |
| 8677 | emits the second for a 16-bit offset or add_got_offset_hilo emits |
| 8678 | a sequence to add a 32-bit offset using a scratch register. */ |
| 8679 | |
| 8680 | static void |
| 8681 | load_got_offset (int dest, expressionS *local) |
| 8682 | { |
| 8683 | expressionS global; |
| 8684 | |
| 8685 | global = *local; |
| 8686 | global.X_add_number = 0; |
| 8687 | |
| 8688 | relax_start (local->X_add_symbol); |
| 8689 | macro_build (&global, ADDRESS_LOAD_INSN, "t,o(b)", dest, |
| 8690 | BFD_RELOC_MIPS_GOT16, mips_gp_register); |
| 8691 | relax_switch (); |
| 8692 | macro_build (local, ADDRESS_LOAD_INSN, "t,o(b)", dest, |
| 8693 | BFD_RELOC_MIPS_GOT16, mips_gp_register); |
| 8694 | relax_end (); |
| 8695 | } |
| 8696 | |
| 8697 | static void |
| 8698 | add_got_offset (int dest, expressionS *local) |
| 8699 | { |
| 8700 | expressionS global; |
| 8701 | |
| 8702 | global.X_op = O_constant; |
| 8703 | global.X_op_symbol = NULL; |
| 8704 | global.X_add_symbol = NULL; |
| 8705 | global.X_add_number = local->X_add_number; |
| 8706 | |
| 8707 | relax_start (local->X_add_symbol); |
| 8708 | macro_build (&global, ADDRESS_ADDI_INSN, "t,r,j", |
| 8709 | dest, dest, BFD_RELOC_LO16); |
| 8710 | relax_switch (); |
| 8711 | macro_build (local, ADDRESS_ADDI_INSN, "t,r,j", dest, dest, BFD_RELOC_LO16); |
| 8712 | relax_end (); |
| 8713 | } |
| 8714 | |
| 8715 | static void |
| 8716 | add_got_offset_hilo (int dest, expressionS *local, int tmp) |
| 8717 | { |
| 8718 | expressionS global; |
| 8719 | int hold_mips_optimize; |
| 8720 | |
| 8721 | global.X_op = O_constant; |
| 8722 | global.X_op_symbol = NULL; |
| 8723 | global.X_add_symbol = NULL; |
| 8724 | global.X_add_number = local->X_add_number; |
| 8725 | |
| 8726 | relax_start (local->X_add_symbol); |
| 8727 | load_register (tmp, &global, HAVE_64BIT_ADDRESSES); |
| 8728 | relax_switch (); |
| 8729 | /* Set mips_optimize around the lui instruction to avoid |
| 8730 | inserting an unnecessary nop after the lw. */ |
| 8731 | hold_mips_optimize = mips_optimize; |
| 8732 | mips_optimize = 2; |
| 8733 | macro_build_lui (&global, tmp); |
| 8734 | mips_optimize = hold_mips_optimize; |
| 8735 | macro_build (local, ADDRESS_ADDI_INSN, "t,r,j", tmp, tmp, BFD_RELOC_LO16); |
| 8736 | relax_end (); |
| 8737 | |
| 8738 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", dest, dest, tmp); |
| 8739 | } |
| 8740 | |
| 8741 | /* Emit a sequence of instructions to emulate a branch likely operation. |
| 8742 | BR is an ordinary branch corresponding to one to be emulated. BRNEG |
| 8743 | is its complementing branch with the original condition negated. |
| 8744 | CALL is set if the original branch specified the link operation. |
| 8745 | EP, FMT, SREG and TREG specify the usual macro_build() parameters. |
| 8746 | |
| 8747 | Code like this is produced in the noreorder mode: |
| 8748 | |
| 8749 | BRNEG <args>, 1f |
| 8750 | nop |
| 8751 | b <sym> |
| 8752 | delay slot (executed only if branch taken) |
| 8753 | 1: |
| 8754 | |
| 8755 | or, if CALL is set: |
| 8756 | |
| 8757 | BRNEG <args>, 1f |
| 8758 | nop |
| 8759 | bal <sym> |
| 8760 | delay slot (executed only if branch taken) |
| 8761 | 1: |
| 8762 | |
| 8763 | In the reorder mode the delay slot would be filled with a nop anyway, |
| 8764 | so code produced is simply: |
| 8765 | |
| 8766 | BR <args>, <sym> |
| 8767 | nop |
| 8768 | |
| 8769 | This function is used when producing code for the microMIPS ASE that |
| 8770 | does not implement branch likely instructions in hardware. */ |
| 8771 | |
| 8772 | static void |
| 8773 | macro_build_branch_likely (const char *br, const char *brneg, |
| 8774 | int call, expressionS *ep, const char *fmt, |
| 8775 | unsigned int sreg, unsigned int treg) |
| 8776 | { |
| 8777 | int noreorder = mips_opts.noreorder; |
| 8778 | expressionS expr1; |
| 8779 | |
| 8780 | gas_assert (mips_opts.micromips); |
| 8781 | start_noreorder (); |
| 8782 | if (noreorder) |
| 8783 | { |
| 8784 | micromips_label_expr (&expr1); |
| 8785 | macro_build (&expr1, brneg, fmt, sreg, treg); |
| 8786 | macro_build (NULL, "nop", ""); |
| 8787 | macro_build (ep, call ? "bal" : "b", "p"); |
| 8788 | |
| 8789 | /* Set to true so that append_insn adds a label. */ |
| 8790 | emit_branch_likely_macro = TRUE; |
| 8791 | } |
| 8792 | else |
| 8793 | { |
| 8794 | macro_build (ep, br, fmt, sreg, treg); |
| 8795 | macro_build (NULL, "nop", ""); |
| 8796 | } |
| 8797 | end_noreorder (); |
| 8798 | } |
| 8799 | |
| 8800 | /* Emit a coprocessor branch-likely macro specified by TYPE, using CC as |
| 8801 | the condition code tested. EP specifies the branch target. */ |
| 8802 | |
| 8803 | static void |
| 8804 | macro_build_branch_ccl (int type, expressionS *ep, unsigned int cc) |
| 8805 | { |
| 8806 | const int call = 0; |
| 8807 | const char *brneg; |
| 8808 | const char *br; |
| 8809 | |
| 8810 | switch (type) |
| 8811 | { |
| 8812 | case M_BC1FL: |
| 8813 | br = "bc1f"; |
| 8814 | brneg = "bc1t"; |
| 8815 | break; |
| 8816 | case M_BC1TL: |
| 8817 | br = "bc1t"; |
| 8818 | brneg = "bc1f"; |
| 8819 | break; |
| 8820 | case M_BC2FL: |
| 8821 | br = "bc2f"; |
| 8822 | brneg = "bc2t"; |
| 8823 | break; |
| 8824 | case M_BC2TL: |
| 8825 | br = "bc2t"; |
| 8826 | brneg = "bc2f"; |
| 8827 | break; |
| 8828 | default: |
| 8829 | abort (); |
| 8830 | } |
| 8831 | macro_build_branch_likely (br, brneg, call, ep, "N,p", cc, ZERO); |
| 8832 | } |
| 8833 | |
| 8834 | /* Emit a two-argument branch macro specified by TYPE, using SREG as |
| 8835 | the register tested. EP specifies the branch target. */ |
| 8836 | |
| 8837 | static void |
| 8838 | macro_build_branch_rs (int type, expressionS *ep, unsigned int sreg) |
| 8839 | { |
| 8840 | const char *brneg = NULL; |
| 8841 | const char *br; |
| 8842 | int call = 0; |
| 8843 | |
| 8844 | switch (type) |
| 8845 | { |
| 8846 | case M_BGEZ: |
| 8847 | br = "bgez"; |
| 8848 | break; |
| 8849 | case M_BGEZL: |
| 8850 | br = mips_opts.micromips ? "bgez" : "bgezl"; |
| 8851 | brneg = "bltz"; |
| 8852 | break; |
| 8853 | case M_BGEZALL: |
| 8854 | gas_assert (mips_opts.micromips); |
| 8855 | br = mips_opts.insn32 ? "bgezal" : "bgezals"; |
| 8856 | brneg = "bltz"; |
| 8857 | call = 1; |
| 8858 | break; |
| 8859 | case M_BGTZ: |
| 8860 | br = "bgtz"; |
| 8861 | break; |
| 8862 | case M_BGTZL: |
| 8863 | br = mips_opts.micromips ? "bgtz" : "bgtzl"; |
| 8864 | brneg = "blez"; |
| 8865 | break; |
| 8866 | case M_BLEZ: |
| 8867 | br = "blez"; |
| 8868 | break; |
| 8869 | case M_BLEZL: |
| 8870 | br = mips_opts.micromips ? "blez" : "blezl"; |
| 8871 | brneg = "bgtz"; |
| 8872 | break; |
| 8873 | case M_BLTZ: |
| 8874 | br = "bltz"; |
| 8875 | break; |
| 8876 | case M_BLTZL: |
| 8877 | br = mips_opts.micromips ? "bltz" : "bltzl"; |
| 8878 | brneg = "bgez"; |
| 8879 | break; |
| 8880 | case M_BLTZALL: |
| 8881 | gas_assert (mips_opts.micromips); |
| 8882 | br = mips_opts.insn32 ? "bltzal" : "bltzals"; |
| 8883 | brneg = "bgez"; |
| 8884 | call = 1; |
| 8885 | break; |
| 8886 | default: |
| 8887 | abort (); |
| 8888 | } |
| 8889 | if (mips_opts.micromips && brneg) |
| 8890 | macro_build_branch_likely (br, brneg, call, ep, "s,p", sreg, ZERO); |
| 8891 | else |
| 8892 | macro_build (ep, br, "s,p", sreg); |
| 8893 | } |
| 8894 | |
| 8895 | /* Emit a three-argument branch macro specified by TYPE, using SREG and |
| 8896 | TREG as the registers tested. EP specifies the branch target. */ |
| 8897 | |
| 8898 | static void |
| 8899 | macro_build_branch_rsrt (int type, expressionS *ep, |
| 8900 | unsigned int sreg, unsigned int treg) |
| 8901 | { |
| 8902 | const char *brneg = NULL; |
| 8903 | const int call = 0; |
| 8904 | const char *br; |
| 8905 | |
| 8906 | switch (type) |
| 8907 | { |
| 8908 | case M_BEQ: |
| 8909 | case M_BEQ_I: |
| 8910 | br = "beq"; |
| 8911 | break; |
| 8912 | case M_BEQL: |
| 8913 | case M_BEQL_I: |
| 8914 | br = mips_opts.micromips ? "beq" : "beql"; |
| 8915 | brneg = "bne"; |
| 8916 | break; |
| 8917 | case M_BNE: |
| 8918 | case M_BNE_I: |
| 8919 | br = "bne"; |
| 8920 | break; |
| 8921 | case M_BNEL: |
| 8922 | case M_BNEL_I: |
| 8923 | br = mips_opts.micromips ? "bne" : "bnel"; |
| 8924 | brneg = "beq"; |
| 8925 | break; |
| 8926 | default: |
| 8927 | abort (); |
| 8928 | } |
| 8929 | if (mips_opts.micromips && brneg) |
| 8930 | macro_build_branch_likely (br, brneg, call, ep, "s,t,p", sreg, treg); |
| 8931 | else |
| 8932 | macro_build (ep, br, "s,t,p", sreg, treg); |
| 8933 | } |
| 8934 | |
| 8935 | /* Return the high part that should be loaded in order to make the low |
| 8936 | part of VALUE accessible using an offset of OFFBITS bits. */ |
| 8937 | |
| 8938 | static offsetT |
| 8939 | offset_high_part (offsetT value, unsigned int offbits) |
| 8940 | { |
| 8941 | offsetT bias; |
| 8942 | addressT low_mask; |
| 8943 | |
| 8944 | if (offbits == 0) |
| 8945 | return value; |
| 8946 | bias = 1 << (offbits - 1); |
| 8947 | low_mask = bias * 2 - 1; |
| 8948 | return (value + bias) & ~low_mask; |
| 8949 | } |
| 8950 | |
| 8951 | /* Return true if the value stored in offset_expr and offset_reloc |
| 8952 | fits into a signed offset of OFFBITS bits. RANGE is the maximum |
| 8953 | amount that the caller wants to add without inducing overflow |
| 8954 | and ALIGN is the known alignment of the value in bytes. */ |
| 8955 | |
| 8956 | static bfd_boolean |
| 8957 | small_offset_p (unsigned int range, unsigned int align, unsigned int offbits) |
| 8958 | { |
| 8959 | if (offbits == 16) |
| 8960 | { |
| 8961 | /* Accept any relocation operator if overflow isn't a concern. */ |
| 8962 | if (range < align && *offset_reloc != BFD_RELOC_UNUSED) |
| 8963 | return TRUE; |
| 8964 | |
| 8965 | /* These relocations are guaranteed not to overflow in correct links. */ |
| 8966 | if (*offset_reloc == BFD_RELOC_MIPS_LITERAL |
| 8967 | || gprel16_reloc_p (*offset_reloc)) |
| 8968 | return TRUE; |
| 8969 | } |
| 8970 | if (offset_expr.X_op == O_constant |
| 8971 | && offset_high_part (offset_expr.X_add_number, offbits) == 0 |
| 8972 | && offset_high_part (offset_expr.X_add_number + range, offbits) == 0) |
| 8973 | return TRUE; |
| 8974 | return FALSE; |
| 8975 | } |
| 8976 | |
| 8977 | /* |
| 8978 | * Build macros |
| 8979 | * This routine implements the seemingly endless macro or synthesized |
| 8980 | * instructions and addressing modes in the mips assembly language. Many |
| 8981 | * of these macros are simple and are similar to each other. These could |
| 8982 | * probably be handled by some kind of table or grammar approach instead of |
| 8983 | * this verbose method. Others are not simple macros but are more like |
| 8984 | * optimizing code generation. |
| 8985 | * One interesting optimization is when several store macros appear |
| 8986 | * consecutively that would load AT with the upper half of the same address. |
| 8987 | * The ensuing load upper instructions are ommited. This implies some kind |
| 8988 | * of global optimization. We currently only optimize within a single macro. |
| 8989 | * For many of the load and store macros if the address is specified as a |
| 8990 | * constant expression in the first 64k of memory (ie ld $2,0x4000c) we |
| 8991 | * first load register 'at' with zero and use it as the base register. The |
| 8992 | * mips assembler simply uses register $zero. Just one tiny optimization |
| 8993 | * we're missing. |
| 8994 | */ |
| 8995 | static void |
| 8996 | macro (struct mips_cl_insn *ip, char *str) |
| 8997 | { |
| 8998 | const struct mips_operand_array *operands; |
| 8999 | unsigned int breg, i; |
| 9000 | unsigned int tempreg; |
| 9001 | int mask; |
| 9002 | int used_at = 0; |
| 9003 | expressionS label_expr; |
| 9004 | expressionS expr1; |
| 9005 | expressionS *ep; |
| 9006 | const char *s; |
| 9007 | const char *s2; |
| 9008 | const char *fmt; |
| 9009 | int likely = 0; |
| 9010 | int coproc = 0; |
| 9011 | int offbits = 16; |
| 9012 | int call = 0; |
| 9013 | int jals = 0; |
| 9014 | int dbl = 0; |
| 9015 | int imm = 0; |
| 9016 | int ust = 0; |
| 9017 | int lp = 0; |
| 9018 | bfd_boolean large_offset; |
| 9019 | int off; |
| 9020 | int hold_mips_optimize; |
| 9021 | unsigned int align; |
| 9022 | unsigned int op[MAX_OPERANDS]; |
| 9023 | |
| 9024 | gas_assert (! mips_opts.mips16); |
| 9025 | |
| 9026 | operands = insn_operands (ip); |
| 9027 | for (i = 0; i < MAX_OPERANDS; i++) |
| 9028 | if (operands->operand[i]) |
| 9029 | op[i] = insn_extract_operand (ip, operands->operand[i]); |
| 9030 | else |
| 9031 | op[i] = -1; |
| 9032 | |
| 9033 | mask = ip->insn_mo->mask; |
| 9034 | |
| 9035 | label_expr.X_op = O_constant; |
| 9036 | label_expr.X_op_symbol = NULL; |
| 9037 | label_expr.X_add_symbol = NULL; |
| 9038 | label_expr.X_add_number = 0; |
| 9039 | |
| 9040 | expr1.X_op = O_constant; |
| 9041 | expr1.X_op_symbol = NULL; |
| 9042 | expr1.X_add_symbol = NULL; |
| 9043 | expr1.X_add_number = 1; |
| 9044 | align = 1; |
| 9045 | |
| 9046 | switch (mask) |
| 9047 | { |
| 9048 | case M_DABS: |
| 9049 | dbl = 1; |
| 9050 | case M_ABS: |
| 9051 | /* bgez $a0,1f |
| 9052 | move v0,$a0 |
| 9053 | sub v0,$zero,$a0 |
| 9054 | 1: |
| 9055 | */ |
| 9056 | |
| 9057 | start_noreorder (); |
| 9058 | |
| 9059 | if (mips_opts.micromips) |
| 9060 | micromips_label_expr (&label_expr); |
| 9061 | else |
| 9062 | label_expr.X_add_number = 8; |
| 9063 | macro_build (&label_expr, "bgez", "s,p", op[1]); |
| 9064 | if (op[0] == op[1]) |
| 9065 | macro_build (NULL, "nop", ""); |
| 9066 | else |
| 9067 | move_register (op[0], op[1]); |
| 9068 | macro_build (NULL, dbl ? "dsub" : "sub", "d,v,t", op[0], 0, op[1]); |
| 9069 | if (mips_opts.micromips) |
| 9070 | micromips_add_label (); |
| 9071 | |
| 9072 | end_noreorder (); |
| 9073 | break; |
| 9074 | |
| 9075 | case M_ADD_I: |
| 9076 | s = "addi"; |
| 9077 | s2 = "add"; |
| 9078 | goto do_addi; |
| 9079 | case M_ADDU_I: |
| 9080 | s = "addiu"; |
| 9081 | s2 = "addu"; |
| 9082 | goto do_addi; |
| 9083 | case M_DADD_I: |
| 9084 | dbl = 1; |
| 9085 | s = "daddi"; |
| 9086 | s2 = "dadd"; |
| 9087 | if (!mips_opts.micromips) |
| 9088 | goto do_addi; |
| 9089 | if (imm_expr.X_add_number >= -0x200 |
| 9090 | && imm_expr.X_add_number < 0x200) |
| 9091 | { |
| 9092 | macro_build (NULL, s, "t,r,.", op[0], op[1], |
| 9093 | (int) imm_expr.X_add_number); |
| 9094 | break; |
| 9095 | } |
| 9096 | goto do_addi_i; |
| 9097 | case M_DADDU_I: |
| 9098 | dbl = 1; |
| 9099 | s = "daddiu"; |
| 9100 | s2 = "daddu"; |
| 9101 | do_addi: |
| 9102 | if (imm_expr.X_add_number >= -0x8000 |
| 9103 | && imm_expr.X_add_number < 0x8000) |
| 9104 | { |
| 9105 | macro_build (&imm_expr, s, "t,r,j", op[0], op[1], BFD_RELOC_LO16); |
| 9106 | break; |
| 9107 | } |
| 9108 | do_addi_i: |
| 9109 | used_at = 1; |
| 9110 | load_register (AT, &imm_expr, dbl); |
| 9111 | macro_build (NULL, s2, "d,v,t", op[0], op[1], AT); |
| 9112 | break; |
| 9113 | |
| 9114 | case M_AND_I: |
| 9115 | s = "andi"; |
| 9116 | s2 = "and"; |
| 9117 | goto do_bit; |
| 9118 | case M_OR_I: |
| 9119 | s = "ori"; |
| 9120 | s2 = "or"; |
| 9121 | goto do_bit; |
| 9122 | case M_NOR_I: |
| 9123 | s = ""; |
| 9124 | s2 = "nor"; |
| 9125 | goto do_bit; |
| 9126 | case M_XOR_I: |
| 9127 | s = "xori"; |
| 9128 | s2 = "xor"; |
| 9129 | do_bit: |
| 9130 | if (imm_expr.X_add_number >= 0 |
| 9131 | && imm_expr.X_add_number < 0x10000) |
| 9132 | { |
| 9133 | if (mask != M_NOR_I) |
| 9134 | macro_build (&imm_expr, s, "t,r,i", op[0], op[1], BFD_RELOC_LO16); |
| 9135 | else |
| 9136 | { |
| 9137 | macro_build (&imm_expr, "ori", "t,r,i", |
| 9138 | op[0], op[1], BFD_RELOC_LO16); |
| 9139 | macro_build (NULL, "nor", "d,v,t", op[0], op[0], 0); |
| 9140 | } |
| 9141 | break; |
| 9142 | } |
| 9143 | |
| 9144 | used_at = 1; |
| 9145 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 9146 | macro_build (NULL, s2, "d,v,t", op[0], op[1], AT); |
| 9147 | break; |
| 9148 | |
| 9149 | case M_BALIGN: |
| 9150 | switch (imm_expr.X_add_number) |
| 9151 | { |
| 9152 | case 0: |
| 9153 | macro_build (NULL, "nop", ""); |
| 9154 | break; |
| 9155 | case 2: |
| 9156 | macro_build (NULL, "packrl.ph", "d,s,t", op[0], op[0], op[1]); |
| 9157 | break; |
| 9158 | case 1: |
| 9159 | case 3: |
| 9160 | macro_build (NULL, "balign", "t,s,2", op[0], op[1], |
| 9161 | (int) imm_expr.X_add_number); |
| 9162 | break; |
| 9163 | default: |
| 9164 | as_bad (_("BALIGN immediate not 0, 1, 2 or 3 (%lu)"), |
| 9165 | (unsigned long) imm_expr.X_add_number); |
| 9166 | break; |
| 9167 | } |
| 9168 | break; |
| 9169 | |
| 9170 | case M_BC1FL: |
| 9171 | case M_BC1TL: |
| 9172 | case M_BC2FL: |
| 9173 | case M_BC2TL: |
| 9174 | gas_assert (mips_opts.micromips); |
| 9175 | macro_build_branch_ccl (mask, &offset_expr, |
| 9176 | EXTRACT_OPERAND (1, BCC, *ip)); |
| 9177 | break; |
| 9178 | |
| 9179 | case M_BEQ_I: |
| 9180 | case M_BEQL_I: |
| 9181 | case M_BNE_I: |
| 9182 | case M_BNEL_I: |
| 9183 | if (imm_expr.X_add_number == 0) |
| 9184 | op[1] = 0; |
| 9185 | else |
| 9186 | { |
| 9187 | op[1] = AT; |
| 9188 | used_at = 1; |
| 9189 | load_register (op[1], &imm_expr, HAVE_64BIT_GPRS); |
| 9190 | } |
| 9191 | /* Fall through. */ |
| 9192 | case M_BEQL: |
| 9193 | case M_BNEL: |
| 9194 | macro_build_branch_rsrt (mask, &offset_expr, op[0], op[1]); |
| 9195 | break; |
| 9196 | |
| 9197 | case M_BGEL: |
| 9198 | likely = 1; |
| 9199 | case M_BGE: |
| 9200 | if (op[1] == 0) |
| 9201 | macro_build_branch_rs (likely ? M_BGEZL : M_BGEZ, &offset_expr, op[0]); |
| 9202 | else if (op[0] == 0) |
| 9203 | macro_build_branch_rs (likely ? M_BLEZL : M_BLEZ, &offset_expr, op[1]); |
| 9204 | else |
| 9205 | { |
| 9206 | used_at = 1; |
| 9207 | macro_build (NULL, "slt", "d,v,t", AT, op[0], op[1]); |
| 9208 | macro_build_branch_rsrt (likely ? M_BEQL : M_BEQ, |
| 9209 | &offset_expr, AT, ZERO); |
| 9210 | } |
| 9211 | break; |
| 9212 | |
| 9213 | case M_BGEZL: |
| 9214 | case M_BGEZALL: |
| 9215 | case M_BGTZL: |
| 9216 | case M_BLEZL: |
| 9217 | case M_BLTZL: |
| 9218 | case M_BLTZALL: |
| 9219 | macro_build_branch_rs (mask, &offset_expr, op[0]); |
| 9220 | break; |
| 9221 | |
| 9222 | case M_BGTL_I: |
| 9223 | likely = 1; |
| 9224 | case M_BGT_I: |
| 9225 | /* Check for > max integer. */ |
| 9226 | if (imm_expr.X_add_number >= GPR_SMAX) |
| 9227 | { |
| 9228 | do_false: |
| 9229 | /* Result is always false. */ |
| 9230 | if (! likely) |
| 9231 | macro_build (NULL, "nop", ""); |
| 9232 | else |
| 9233 | macro_build_branch_rsrt (M_BNEL, &offset_expr, ZERO, ZERO); |
| 9234 | break; |
| 9235 | } |
| 9236 | ++imm_expr.X_add_number; |
| 9237 | /* FALLTHROUGH */ |
| 9238 | case M_BGE_I: |
| 9239 | case M_BGEL_I: |
| 9240 | if (mask == M_BGEL_I) |
| 9241 | likely = 1; |
| 9242 | if (imm_expr.X_add_number == 0) |
| 9243 | { |
| 9244 | macro_build_branch_rs (likely ? M_BGEZL : M_BGEZ, |
| 9245 | &offset_expr, op[0]); |
| 9246 | break; |
| 9247 | } |
| 9248 | if (imm_expr.X_add_number == 1) |
| 9249 | { |
| 9250 | macro_build_branch_rs (likely ? M_BGTZL : M_BGTZ, |
| 9251 | &offset_expr, op[0]); |
| 9252 | break; |
| 9253 | } |
| 9254 | if (imm_expr.X_add_number <= GPR_SMIN) |
| 9255 | { |
| 9256 | do_true: |
| 9257 | /* result is always true */ |
| 9258 | as_warn (_("branch %s is always true"), ip->insn_mo->name); |
| 9259 | macro_build (&offset_expr, "b", "p"); |
| 9260 | break; |
| 9261 | } |
| 9262 | used_at = 1; |
| 9263 | set_at (op[0], 0); |
| 9264 | macro_build_branch_rsrt (likely ? M_BEQL : M_BEQ, |
| 9265 | &offset_expr, AT, ZERO); |
| 9266 | break; |
| 9267 | |
| 9268 | case M_BGEUL: |
| 9269 | likely = 1; |
| 9270 | case M_BGEU: |
| 9271 | if (op[1] == 0) |
| 9272 | goto do_true; |
| 9273 | else if (op[0] == 0) |
| 9274 | macro_build_branch_rsrt (likely ? M_BEQL : M_BEQ, |
| 9275 | &offset_expr, ZERO, op[1]); |
| 9276 | else |
| 9277 | { |
| 9278 | used_at = 1; |
| 9279 | macro_build (NULL, "sltu", "d,v,t", AT, op[0], op[1]); |
| 9280 | macro_build_branch_rsrt (likely ? M_BEQL : M_BEQ, |
| 9281 | &offset_expr, AT, ZERO); |
| 9282 | } |
| 9283 | break; |
| 9284 | |
| 9285 | case M_BGTUL_I: |
| 9286 | likely = 1; |
| 9287 | case M_BGTU_I: |
| 9288 | if (op[0] == 0 |
| 9289 | || (HAVE_32BIT_GPRS |
| 9290 | && imm_expr.X_add_number == -1)) |
| 9291 | goto do_false; |
| 9292 | ++imm_expr.X_add_number; |
| 9293 | /* FALLTHROUGH */ |
| 9294 | case M_BGEU_I: |
| 9295 | case M_BGEUL_I: |
| 9296 | if (mask == M_BGEUL_I) |
| 9297 | likely = 1; |
| 9298 | if (imm_expr.X_add_number == 0) |
| 9299 | goto do_true; |
| 9300 | else if (imm_expr.X_add_number == 1) |
| 9301 | macro_build_branch_rsrt (likely ? M_BNEL : M_BNE, |
| 9302 | &offset_expr, op[0], ZERO); |
| 9303 | else |
| 9304 | { |
| 9305 | used_at = 1; |
| 9306 | set_at (op[0], 1); |
| 9307 | macro_build_branch_rsrt (likely ? M_BEQL : M_BEQ, |
| 9308 | &offset_expr, AT, ZERO); |
| 9309 | } |
| 9310 | break; |
| 9311 | |
| 9312 | case M_BGTL: |
| 9313 | likely = 1; |
| 9314 | case M_BGT: |
| 9315 | if (op[1] == 0) |
| 9316 | macro_build_branch_rs (likely ? M_BGTZL : M_BGTZ, &offset_expr, op[0]); |
| 9317 | else if (op[0] == 0) |
| 9318 | macro_build_branch_rs (likely ? M_BLTZL : M_BLTZ, &offset_expr, op[1]); |
| 9319 | else |
| 9320 | { |
| 9321 | used_at = 1; |
| 9322 | macro_build (NULL, "slt", "d,v,t", AT, op[1], op[0]); |
| 9323 | macro_build_branch_rsrt (likely ? M_BNEL : M_BNE, |
| 9324 | &offset_expr, AT, ZERO); |
| 9325 | } |
| 9326 | break; |
| 9327 | |
| 9328 | case M_BGTUL: |
| 9329 | likely = 1; |
| 9330 | case M_BGTU: |
| 9331 | if (op[1] == 0) |
| 9332 | macro_build_branch_rsrt (likely ? M_BNEL : M_BNE, |
| 9333 | &offset_expr, op[0], ZERO); |
| 9334 | else if (op[0] == 0) |
| 9335 | goto do_false; |
| 9336 | else |
| 9337 | { |
| 9338 | used_at = 1; |
| 9339 | macro_build (NULL, "sltu", "d,v,t", AT, op[1], op[0]); |
| 9340 | macro_build_branch_rsrt (likely ? M_BNEL : M_BNE, |
| 9341 | &offset_expr, AT, ZERO); |
| 9342 | } |
| 9343 | break; |
| 9344 | |
| 9345 | case M_BLEL: |
| 9346 | likely = 1; |
| 9347 | case M_BLE: |
| 9348 | if (op[1] == 0) |
| 9349 | macro_build_branch_rs (likely ? M_BLEZL : M_BLEZ, &offset_expr, op[0]); |
| 9350 | else if (op[0] == 0) |
| 9351 | macro_build_branch_rs (likely ? M_BGEZL : M_BGEZ, &offset_expr, op[1]); |
| 9352 | else |
| 9353 | { |
| 9354 | used_at = 1; |
| 9355 | macro_build (NULL, "slt", "d,v,t", AT, op[1], op[0]); |
| 9356 | macro_build_branch_rsrt (likely ? M_BEQL : M_BEQ, |
| 9357 | &offset_expr, AT, ZERO); |
| 9358 | } |
| 9359 | break; |
| 9360 | |
| 9361 | case M_BLEL_I: |
| 9362 | likely = 1; |
| 9363 | case M_BLE_I: |
| 9364 | if (imm_expr.X_add_number >= GPR_SMAX) |
| 9365 | goto do_true; |
| 9366 | ++imm_expr.X_add_number; |
| 9367 | /* FALLTHROUGH */ |
| 9368 | case M_BLT_I: |
| 9369 | case M_BLTL_I: |
| 9370 | if (mask == M_BLTL_I) |
| 9371 | likely = 1; |
| 9372 | if (imm_expr.X_add_number == 0) |
| 9373 | macro_build_branch_rs (likely ? M_BLTZL : M_BLTZ, &offset_expr, op[0]); |
| 9374 | else if (imm_expr.X_add_number == 1) |
| 9375 | macro_build_branch_rs (likely ? M_BLEZL : M_BLEZ, &offset_expr, op[0]); |
| 9376 | else |
| 9377 | { |
| 9378 | used_at = 1; |
| 9379 | set_at (op[0], 0); |
| 9380 | macro_build_branch_rsrt (likely ? M_BNEL : M_BNE, |
| 9381 | &offset_expr, AT, ZERO); |
| 9382 | } |
| 9383 | break; |
| 9384 | |
| 9385 | case M_BLEUL: |
| 9386 | likely = 1; |
| 9387 | case M_BLEU: |
| 9388 | if (op[1] == 0) |
| 9389 | macro_build_branch_rsrt (likely ? M_BEQL : M_BEQ, |
| 9390 | &offset_expr, op[0], ZERO); |
| 9391 | else if (op[0] == 0) |
| 9392 | goto do_true; |
| 9393 | else |
| 9394 | { |
| 9395 | used_at = 1; |
| 9396 | macro_build (NULL, "sltu", "d,v,t", AT, op[1], op[0]); |
| 9397 | macro_build_branch_rsrt (likely ? M_BEQL : M_BEQ, |
| 9398 | &offset_expr, AT, ZERO); |
| 9399 | } |
| 9400 | break; |
| 9401 | |
| 9402 | case M_BLEUL_I: |
| 9403 | likely = 1; |
| 9404 | case M_BLEU_I: |
| 9405 | if (op[0] == 0 |
| 9406 | || (HAVE_32BIT_GPRS |
| 9407 | && imm_expr.X_add_number == -1)) |
| 9408 | goto do_true; |
| 9409 | ++imm_expr.X_add_number; |
| 9410 | /* FALLTHROUGH */ |
| 9411 | case M_BLTU_I: |
| 9412 | case M_BLTUL_I: |
| 9413 | if (mask == M_BLTUL_I) |
| 9414 | likely = 1; |
| 9415 | if (imm_expr.X_add_number == 0) |
| 9416 | goto do_false; |
| 9417 | else if (imm_expr.X_add_number == 1) |
| 9418 | macro_build_branch_rsrt (likely ? M_BEQL : M_BEQ, |
| 9419 | &offset_expr, op[0], ZERO); |
| 9420 | else |
| 9421 | { |
| 9422 | used_at = 1; |
| 9423 | set_at (op[0], 1); |
| 9424 | macro_build_branch_rsrt (likely ? M_BNEL : M_BNE, |
| 9425 | &offset_expr, AT, ZERO); |
| 9426 | } |
| 9427 | break; |
| 9428 | |
| 9429 | case M_BLTL: |
| 9430 | likely = 1; |
| 9431 | case M_BLT: |
| 9432 | if (op[1] == 0) |
| 9433 | macro_build_branch_rs (likely ? M_BLTZL : M_BLTZ, &offset_expr, op[0]); |
| 9434 | else if (op[0] == 0) |
| 9435 | macro_build_branch_rs (likely ? M_BGTZL : M_BGTZ, &offset_expr, op[1]); |
| 9436 | else |
| 9437 | { |
| 9438 | used_at = 1; |
| 9439 | macro_build (NULL, "slt", "d,v,t", AT, op[0], op[1]); |
| 9440 | macro_build_branch_rsrt (likely ? M_BNEL : M_BNE, |
| 9441 | &offset_expr, AT, ZERO); |
| 9442 | } |
| 9443 | break; |
| 9444 | |
| 9445 | case M_BLTUL: |
| 9446 | likely = 1; |
| 9447 | case M_BLTU: |
| 9448 | if (op[1] == 0) |
| 9449 | goto do_false; |
| 9450 | else if (op[0] == 0) |
| 9451 | macro_build_branch_rsrt (likely ? M_BNEL : M_BNE, |
| 9452 | &offset_expr, ZERO, op[1]); |
| 9453 | else |
| 9454 | { |
| 9455 | used_at = 1; |
| 9456 | macro_build (NULL, "sltu", "d,v,t", AT, op[0], op[1]); |
| 9457 | macro_build_branch_rsrt (likely ? M_BNEL : M_BNE, |
| 9458 | &offset_expr, AT, ZERO); |
| 9459 | } |
| 9460 | break; |
| 9461 | |
| 9462 | case M_DDIV_3: |
| 9463 | dbl = 1; |
| 9464 | case M_DIV_3: |
| 9465 | s = "mflo"; |
| 9466 | goto do_div3; |
| 9467 | case M_DREM_3: |
| 9468 | dbl = 1; |
| 9469 | case M_REM_3: |
| 9470 | s = "mfhi"; |
| 9471 | do_div3: |
| 9472 | if (op[2] == 0) |
| 9473 | { |
| 9474 | as_warn (_("divide by zero")); |
| 9475 | if (mips_trap) |
| 9476 | macro_build (NULL, "teq", TRAP_FMT, ZERO, ZERO, 7); |
| 9477 | else |
| 9478 | macro_build (NULL, "break", BRK_FMT, 7); |
| 9479 | break; |
| 9480 | } |
| 9481 | |
| 9482 | start_noreorder (); |
| 9483 | if (mips_trap) |
| 9484 | { |
| 9485 | macro_build (NULL, "teq", TRAP_FMT, op[2], ZERO, 7); |
| 9486 | macro_build (NULL, dbl ? "ddiv" : "div", "z,s,t", op[1], op[2]); |
| 9487 | } |
| 9488 | else |
| 9489 | { |
| 9490 | if (mips_opts.micromips) |
| 9491 | micromips_label_expr (&label_expr); |
| 9492 | else |
| 9493 | label_expr.X_add_number = 8; |
| 9494 | macro_build (&label_expr, "bne", "s,t,p", op[2], ZERO); |
| 9495 | macro_build (NULL, dbl ? "ddiv" : "div", "z,s,t", op[1], op[2]); |
| 9496 | macro_build (NULL, "break", BRK_FMT, 7); |
| 9497 | if (mips_opts.micromips) |
| 9498 | micromips_add_label (); |
| 9499 | } |
| 9500 | expr1.X_add_number = -1; |
| 9501 | used_at = 1; |
| 9502 | load_register (AT, &expr1, dbl); |
| 9503 | if (mips_opts.micromips) |
| 9504 | micromips_label_expr (&label_expr); |
| 9505 | else |
| 9506 | label_expr.X_add_number = mips_trap ? (dbl ? 12 : 8) : (dbl ? 20 : 16); |
| 9507 | macro_build (&label_expr, "bne", "s,t,p", op[2], AT); |
| 9508 | if (dbl) |
| 9509 | { |
| 9510 | expr1.X_add_number = 1; |
| 9511 | load_register (AT, &expr1, dbl); |
| 9512 | macro_build (NULL, "dsll32", SHFT_FMT, AT, AT, 31); |
| 9513 | } |
| 9514 | else |
| 9515 | { |
| 9516 | expr1.X_add_number = 0x80000000; |
| 9517 | macro_build (&expr1, "lui", LUI_FMT, AT, BFD_RELOC_HI16); |
| 9518 | } |
| 9519 | if (mips_trap) |
| 9520 | { |
| 9521 | macro_build (NULL, "teq", TRAP_FMT, op[1], AT, 6); |
| 9522 | /* We want to close the noreorder block as soon as possible, so |
| 9523 | that later insns are available for delay slot filling. */ |
| 9524 | end_noreorder (); |
| 9525 | } |
| 9526 | else |
| 9527 | { |
| 9528 | if (mips_opts.micromips) |
| 9529 | micromips_label_expr (&label_expr); |
| 9530 | else |
| 9531 | label_expr.X_add_number = 8; |
| 9532 | macro_build (&label_expr, "bne", "s,t,p", op[1], AT); |
| 9533 | macro_build (NULL, "nop", ""); |
| 9534 | |
| 9535 | /* We want to close the noreorder block as soon as possible, so |
| 9536 | that later insns are available for delay slot filling. */ |
| 9537 | end_noreorder (); |
| 9538 | |
| 9539 | macro_build (NULL, "break", BRK_FMT, 6); |
| 9540 | } |
| 9541 | if (mips_opts.micromips) |
| 9542 | micromips_add_label (); |
| 9543 | macro_build (NULL, s, MFHL_FMT, op[0]); |
| 9544 | break; |
| 9545 | |
| 9546 | case M_DIV_3I: |
| 9547 | s = "div"; |
| 9548 | s2 = "mflo"; |
| 9549 | goto do_divi; |
| 9550 | case M_DIVU_3I: |
| 9551 | s = "divu"; |
| 9552 | s2 = "mflo"; |
| 9553 | goto do_divi; |
| 9554 | case M_REM_3I: |
| 9555 | s = "div"; |
| 9556 | s2 = "mfhi"; |
| 9557 | goto do_divi; |
| 9558 | case M_REMU_3I: |
| 9559 | s = "divu"; |
| 9560 | s2 = "mfhi"; |
| 9561 | goto do_divi; |
| 9562 | case M_DDIV_3I: |
| 9563 | dbl = 1; |
| 9564 | s = "ddiv"; |
| 9565 | s2 = "mflo"; |
| 9566 | goto do_divi; |
| 9567 | case M_DDIVU_3I: |
| 9568 | dbl = 1; |
| 9569 | s = "ddivu"; |
| 9570 | s2 = "mflo"; |
| 9571 | goto do_divi; |
| 9572 | case M_DREM_3I: |
| 9573 | dbl = 1; |
| 9574 | s = "ddiv"; |
| 9575 | s2 = "mfhi"; |
| 9576 | goto do_divi; |
| 9577 | case M_DREMU_3I: |
| 9578 | dbl = 1; |
| 9579 | s = "ddivu"; |
| 9580 | s2 = "mfhi"; |
| 9581 | do_divi: |
| 9582 | if (imm_expr.X_add_number == 0) |
| 9583 | { |
| 9584 | as_warn (_("divide by zero")); |
| 9585 | if (mips_trap) |
| 9586 | macro_build (NULL, "teq", TRAP_FMT, ZERO, ZERO, 7); |
| 9587 | else |
| 9588 | macro_build (NULL, "break", BRK_FMT, 7); |
| 9589 | break; |
| 9590 | } |
| 9591 | if (imm_expr.X_add_number == 1) |
| 9592 | { |
| 9593 | if (strcmp (s2, "mflo") == 0) |
| 9594 | move_register (op[0], op[1]); |
| 9595 | else |
| 9596 | move_register (op[0], ZERO); |
| 9597 | break; |
| 9598 | } |
| 9599 | if (imm_expr.X_add_number == -1 && s[strlen (s) - 1] != 'u') |
| 9600 | { |
| 9601 | if (strcmp (s2, "mflo") == 0) |
| 9602 | macro_build (NULL, dbl ? "dneg" : "neg", "d,w", op[0], op[1]); |
| 9603 | else |
| 9604 | move_register (op[0], ZERO); |
| 9605 | break; |
| 9606 | } |
| 9607 | |
| 9608 | used_at = 1; |
| 9609 | load_register (AT, &imm_expr, dbl); |
| 9610 | macro_build (NULL, s, "z,s,t", op[1], AT); |
| 9611 | macro_build (NULL, s2, MFHL_FMT, op[0]); |
| 9612 | break; |
| 9613 | |
| 9614 | case M_DIVU_3: |
| 9615 | s = "divu"; |
| 9616 | s2 = "mflo"; |
| 9617 | goto do_divu3; |
| 9618 | case M_REMU_3: |
| 9619 | s = "divu"; |
| 9620 | s2 = "mfhi"; |
| 9621 | goto do_divu3; |
| 9622 | case M_DDIVU_3: |
| 9623 | s = "ddivu"; |
| 9624 | s2 = "mflo"; |
| 9625 | goto do_divu3; |
| 9626 | case M_DREMU_3: |
| 9627 | s = "ddivu"; |
| 9628 | s2 = "mfhi"; |
| 9629 | do_divu3: |
| 9630 | start_noreorder (); |
| 9631 | if (mips_trap) |
| 9632 | { |
| 9633 | macro_build (NULL, "teq", TRAP_FMT, op[2], ZERO, 7); |
| 9634 | macro_build (NULL, s, "z,s,t", op[1], op[2]); |
| 9635 | /* We want to close the noreorder block as soon as possible, so |
| 9636 | that later insns are available for delay slot filling. */ |
| 9637 | end_noreorder (); |
| 9638 | } |
| 9639 | else |
| 9640 | { |
| 9641 | if (mips_opts.micromips) |
| 9642 | micromips_label_expr (&label_expr); |
| 9643 | else |
| 9644 | label_expr.X_add_number = 8; |
| 9645 | macro_build (&label_expr, "bne", "s,t,p", op[2], ZERO); |
| 9646 | macro_build (NULL, s, "z,s,t", op[1], op[2]); |
| 9647 | |
| 9648 | /* We want to close the noreorder block as soon as possible, so |
| 9649 | that later insns are available for delay slot filling. */ |
| 9650 | end_noreorder (); |
| 9651 | macro_build (NULL, "break", BRK_FMT, 7); |
| 9652 | if (mips_opts.micromips) |
| 9653 | micromips_add_label (); |
| 9654 | } |
| 9655 | macro_build (NULL, s2, MFHL_FMT, op[0]); |
| 9656 | break; |
| 9657 | |
| 9658 | case M_DLCA_AB: |
| 9659 | dbl = 1; |
| 9660 | case M_LCA_AB: |
| 9661 | call = 1; |
| 9662 | goto do_la; |
| 9663 | case M_DLA_AB: |
| 9664 | dbl = 1; |
| 9665 | case M_LA_AB: |
| 9666 | do_la: |
| 9667 | /* Load the address of a symbol into a register. If breg is not |
| 9668 | zero, we then add a base register to it. */ |
| 9669 | |
| 9670 | breg = op[2]; |
| 9671 | if (dbl && HAVE_32BIT_GPRS) |
| 9672 | as_warn (_("dla used to load 32-bit register")); |
| 9673 | |
| 9674 | if (!dbl && HAVE_64BIT_OBJECTS) |
| 9675 | as_warn (_("la used to load 64-bit address")); |
| 9676 | |
| 9677 | if (small_offset_p (0, align, 16)) |
| 9678 | { |
| 9679 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", op[0], breg, |
| 9680 | -1, offset_reloc[0], offset_reloc[1], offset_reloc[2]); |
| 9681 | break; |
| 9682 | } |
| 9683 | |
| 9684 | if (mips_opts.at && (op[0] == breg)) |
| 9685 | { |
| 9686 | tempreg = AT; |
| 9687 | used_at = 1; |
| 9688 | } |
| 9689 | else |
| 9690 | tempreg = op[0]; |
| 9691 | |
| 9692 | if (offset_expr.X_op != O_symbol |
| 9693 | && offset_expr.X_op != O_constant) |
| 9694 | { |
| 9695 | as_bad (_("expression too complex")); |
| 9696 | offset_expr.X_op = O_constant; |
| 9697 | } |
| 9698 | |
| 9699 | if (offset_expr.X_op == O_constant) |
| 9700 | load_register (tempreg, &offset_expr, HAVE_64BIT_ADDRESSES); |
| 9701 | else if (mips_pic == NO_PIC) |
| 9702 | { |
| 9703 | /* If this is a reference to a GP relative symbol, we want |
| 9704 | addiu $tempreg,$gp,<sym> (BFD_RELOC_GPREL16) |
| 9705 | Otherwise we want |
| 9706 | lui $tempreg,<sym> (BFD_RELOC_HI16_S) |
| 9707 | addiu $tempreg,$tempreg,<sym> (BFD_RELOC_LO16) |
| 9708 | If we have a constant, we need two instructions anyhow, |
| 9709 | so we may as well always use the latter form. |
| 9710 | |
| 9711 | With 64bit address space and a usable $at we want |
| 9712 | lui $tempreg,<sym> (BFD_RELOC_MIPS_HIGHEST) |
| 9713 | lui $at,<sym> (BFD_RELOC_HI16_S) |
| 9714 | daddiu $tempreg,<sym> (BFD_RELOC_MIPS_HIGHER) |
| 9715 | daddiu $at,<sym> (BFD_RELOC_LO16) |
| 9716 | dsll32 $tempreg,0 |
| 9717 | daddu $tempreg,$tempreg,$at |
| 9718 | |
| 9719 | If $at is already in use, we use a path which is suboptimal |
| 9720 | on superscalar processors. |
| 9721 | lui $tempreg,<sym> (BFD_RELOC_MIPS_HIGHEST) |
| 9722 | daddiu $tempreg,<sym> (BFD_RELOC_MIPS_HIGHER) |
| 9723 | dsll $tempreg,16 |
| 9724 | daddiu $tempreg,<sym> (BFD_RELOC_HI16_S) |
| 9725 | dsll $tempreg,16 |
| 9726 | daddiu $tempreg,<sym> (BFD_RELOC_LO16) |
| 9727 | |
| 9728 | For GP relative symbols in 64bit address space we can use |
| 9729 | the same sequence as in 32bit address space. */ |
| 9730 | if (HAVE_64BIT_SYMBOLS) |
| 9731 | { |
| 9732 | if ((valueT) offset_expr.X_add_number <= MAX_GPREL_OFFSET |
| 9733 | && !nopic_need_relax (offset_expr.X_add_symbol, 1)) |
| 9734 | { |
| 9735 | relax_start (offset_expr.X_add_symbol); |
| 9736 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", |
| 9737 | tempreg, mips_gp_register, BFD_RELOC_GPREL16); |
| 9738 | relax_switch (); |
| 9739 | } |
| 9740 | |
| 9741 | if (used_at == 0 && mips_opts.at) |
| 9742 | { |
| 9743 | macro_build (&offset_expr, "lui", LUI_FMT, |
| 9744 | tempreg, BFD_RELOC_MIPS_HIGHEST); |
| 9745 | macro_build (&offset_expr, "lui", LUI_FMT, |
| 9746 | AT, BFD_RELOC_HI16_S); |
| 9747 | macro_build (&offset_expr, "daddiu", "t,r,j", |
| 9748 | tempreg, tempreg, BFD_RELOC_MIPS_HIGHER); |
| 9749 | macro_build (&offset_expr, "daddiu", "t,r,j", |
| 9750 | AT, AT, BFD_RELOC_LO16); |
| 9751 | macro_build (NULL, "dsll32", SHFT_FMT, tempreg, tempreg, 0); |
| 9752 | macro_build (NULL, "daddu", "d,v,t", tempreg, tempreg, AT); |
| 9753 | used_at = 1; |
| 9754 | } |
| 9755 | else |
| 9756 | { |
| 9757 | macro_build (&offset_expr, "lui", LUI_FMT, |
| 9758 | tempreg, BFD_RELOC_MIPS_HIGHEST); |
| 9759 | macro_build (&offset_expr, "daddiu", "t,r,j", |
| 9760 | tempreg, tempreg, BFD_RELOC_MIPS_HIGHER); |
| 9761 | macro_build (NULL, "dsll", SHFT_FMT, tempreg, tempreg, 16); |
| 9762 | macro_build (&offset_expr, "daddiu", "t,r,j", |
| 9763 | tempreg, tempreg, BFD_RELOC_HI16_S); |
| 9764 | macro_build (NULL, "dsll", SHFT_FMT, tempreg, tempreg, 16); |
| 9765 | macro_build (&offset_expr, "daddiu", "t,r,j", |
| 9766 | tempreg, tempreg, BFD_RELOC_LO16); |
| 9767 | } |
| 9768 | |
| 9769 | if (mips_relax.sequence) |
| 9770 | relax_end (); |
| 9771 | } |
| 9772 | else |
| 9773 | { |
| 9774 | if ((valueT) offset_expr.X_add_number <= MAX_GPREL_OFFSET |
| 9775 | && !nopic_need_relax (offset_expr.X_add_symbol, 1)) |
| 9776 | { |
| 9777 | relax_start (offset_expr.X_add_symbol); |
| 9778 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", |
| 9779 | tempreg, mips_gp_register, BFD_RELOC_GPREL16); |
| 9780 | relax_switch (); |
| 9781 | } |
| 9782 | if (!IS_SEXT_32BIT_NUM (offset_expr.X_add_number)) |
| 9783 | as_bad (_("offset too large")); |
| 9784 | macro_build_lui (&offset_expr, tempreg); |
| 9785 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", |
| 9786 | tempreg, tempreg, BFD_RELOC_LO16); |
| 9787 | if (mips_relax.sequence) |
| 9788 | relax_end (); |
| 9789 | } |
| 9790 | } |
| 9791 | else if (!mips_big_got && !HAVE_NEWABI) |
| 9792 | { |
| 9793 | int lw_reloc_type = (int) BFD_RELOC_MIPS_GOT16; |
| 9794 | |
| 9795 | /* If this is a reference to an external symbol, and there |
| 9796 | is no constant, we want |
| 9797 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 9798 | or for lca or if tempreg is PIC_CALL_REG |
| 9799 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_CALL16) |
| 9800 | For a local symbol, we want |
| 9801 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 9802 | nop |
| 9803 | addiu $tempreg,$tempreg,<sym> (BFD_RELOC_LO16) |
| 9804 | |
| 9805 | If we have a small constant, and this is a reference to |
| 9806 | an external symbol, we want |
| 9807 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 9808 | nop |
| 9809 | addiu $tempreg,$tempreg,<constant> |
| 9810 | For a local symbol, we want the same instruction |
| 9811 | sequence, but we output a BFD_RELOC_LO16 reloc on the |
| 9812 | addiu instruction. |
| 9813 | |
| 9814 | If we have a large constant, and this is a reference to |
| 9815 | an external symbol, we want |
| 9816 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 9817 | lui $at,<hiconstant> |
| 9818 | addiu $at,$at,<loconstant> |
| 9819 | addu $tempreg,$tempreg,$at |
| 9820 | For a local symbol, we want the same instruction |
| 9821 | sequence, but we output a BFD_RELOC_LO16 reloc on the |
| 9822 | addiu instruction. |
| 9823 | */ |
| 9824 | |
| 9825 | if (offset_expr.X_add_number == 0) |
| 9826 | { |
| 9827 | if (mips_pic == SVR4_PIC |
| 9828 | && breg == 0 |
| 9829 | && (call || tempreg == PIC_CALL_REG)) |
| 9830 | lw_reloc_type = (int) BFD_RELOC_MIPS_CALL16; |
| 9831 | |
| 9832 | relax_start (offset_expr.X_add_symbol); |
| 9833 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 9834 | lw_reloc_type, mips_gp_register); |
| 9835 | if (breg != 0) |
| 9836 | { |
| 9837 | /* We're going to put in an addu instruction using |
| 9838 | tempreg, so we may as well insert the nop right |
| 9839 | now. */ |
| 9840 | load_delay_nop (); |
| 9841 | } |
| 9842 | relax_switch (); |
| 9843 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 9844 | tempreg, BFD_RELOC_MIPS_GOT16, mips_gp_register); |
| 9845 | load_delay_nop (); |
| 9846 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", |
| 9847 | tempreg, tempreg, BFD_RELOC_LO16); |
| 9848 | relax_end (); |
| 9849 | /* FIXME: If breg == 0, and the next instruction uses |
| 9850 | $tempreg, then if this variant case is used an extra |
| 9851 | nop will be generated. */ |
| 9852 | } |
| 9853 | else if (offset_expr.X_add_number >= -0x8000 |
| 9854 | && offset_expr.X_add_number < 0x8000) |
| 9855 | { |
| 9856 | load_got_offset (tempreg, &offset_expr); |
| 9857 | load_delay_nop (); |
| 9858 | add_got_offset (tempreg, &offset_expr); |
| 9859 | } |
| 9860 | else |
| 9861 | { |
| 9862 | expr1.X_add_number = offset_expr.X_add_number; |
| 9863 | offset_expr.X_add_number = |
| 9864 | SEXT_16BIT (offset_expr.X_add_number); |
| 9865 | load_got_offset (tempreg, &offset_expr); |
| 9866 | offset_expr.X_add_number = expr1.X_add_number; |
| 9867 | /* If we are going to add in a base register, and the |
| 9868 | target register and the base register are the same, |
| 9869 | then we are using AT as a temporary register. Since |
| 9870 | we want to load the constant into AT, we add our |
| 9871 | current AT (from the global offset table) and the |
| 9872 | register into the register now, and pretend we were |
| 9873 | not using a base register. */ |
| 9874 | if (breg == op[0]) |
| 9875 | { |
| 9876 | load_delay_nop (); |
| 9877 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 9878 | op[0], AT, breg); |
| 9879 | breg = 0; |
| 9880 | tempreg = op[0]; |
| 9881 | } |
| 9882 | add_got_offset_hilo (tempreg, &offset_expr, AT); |
| 9883 | used_at = 1; |
| 9884 | } |
| 9885 | } |
| 9886 | else if (!mips_big_got && HAVE_NEWABI) |
| 9887 | { |
| 9888 | int add_breg_early = 0; |
| 9889 | |
| 9890 | /* If this is a reference to an external, and there is no |
| 9891 | constant, or local symbol (*), with or without a |
| 9892 | constant, we want |
| 9893 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT_DISP) |
| 9894 | or for lca or if tempreg is PIC_CALL_REG |
| 9895 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_CALL16) |
| 9896 | |
| 9897 | If we have a small constant, and this is a reference to |
| 9898 | an external symbol, we want |
| 9899 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT_DISP) |
| 9900 | addiu $tempreg,$tempreg,<constant> |
| 9901 | |
| 9902 | If we have a large constant, and this is a reference to |
| 9903 | an external symbol, we want |
| 9904 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT_DISP) |
| 9905 | lui $at,<hiconstant> |
| 9906 | addiu $at,$at,<loconstant> |
| 9907 | addu $tempreg,$tempreg,$at |
| 9908 | |
| 9909 | (*) Other assemblers seem to prefer GOT_PAGE/GOT_OFST for |
| 9910 | local symbols, even though it introduces an additional |
| 9911 | instruction. */ |
| 9912 | |
| 9913 | if (offset_expr.X_add_number) |
| 9914 | { |
| 9915 | expr1.X_add_number = offset_expr.X_add_number; |
| 9916 | offset_expr.X_add_number = 0; |
| 9917 | |
| 9918 | relax_start (offset_expr.X_add_symbol); |
| 9919 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 9920 | BFD_RELOC_MIPS_GOT_DISP, mips_gp_register); |
| 9921 | |
| 9922 | if (expr1.X_add_number >= -0x8000 |
| 9923 | && expr1.X_add_number < 0x8000) |
| 9924 | { |
| 9925 | macro_build (&expr1, ADDRESS_ADDI_INSN, "t,r,j", |
| 9926 | tempreg, tempreg, BFD_RELOC_LO16); |
| 9927 | } |
| 9928 | else if (IS_SEXT_32BIT_NUM (expr1.X_add_number + 0x8000)) |
| 9929 | { |
| 9930 | unsigned int dreg; |
| 9931 | |
| 9932 | /* If we are going to add in a base register, and the |
| 9933 | target register and the base register are the same, |
| 9934 | then we are using AT as a temporary register. Since |
| 9935 | we want to load the constant into AT, we add our |
| 9936 | current AT (from the global offset table) and the |
| 9937 | register into the register now, and pretend we were |
| 9938 | not using a base register. */ |
| 9939 | if (breg != op[0]) |
| 9940 | dreg = tempreg; |
| 9941 | else |
| 9942 | { |
| 9943 | gas_assert (tempreg == AT); |
| 9944 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 9945 | op[0], AT, breg); |
| 9946 | dreg = op[0]; |
| 9947 | add_breg_early = 1; |
| 9948 | } |
| 9949 | |
| 9950 | load_register (AT, &expr1, HAVE_64BIT_ADDRESSES); |
| 9951 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 9952 | dreg, dreg, AT); |
| 9953 | |
| 9954 | used_at = 1; |
| 9955 | } |
| 9956 | else |
| 9957 | as_bad (_("PIC code offset overflow (max 32 signed bits)")); |
| 9958 | |
| 9959 | relax_switch (); |
| 9960 | offset_expr.X_add_number = expr1.X_add_number; |
| 9961 | |
| 9962 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 9963 | BFD_RELOC_MIPS_GOT_DISP, mips_gp_register); |
| 9964 | if (add_breg_early) |
| 9965 | { |
| 9966 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 9967 | op[0], tempreg, breg); |
| 9968 | breg = 0; |
| 9969 | tempreg = op[0]; |
| 9970 | } |
| 9971 | relax_end (); |
| 9972 | } |
| 9973 | else if (breg == 0 && (call || tempreg == PIC_CALL_REG)) |
| 9974 | { |
| 9975 | relax_start (offset_expr.X_add_symbol); |
| 9976 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 9977 | BFD_RELOC_MIPS_CALL16, mips_gp_register); |
| 9978 | relax_switch (); |
| 9979 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 9980 | BFD_RELOC_MIPS_GOT_DISP, mips_gp_register); |
| 9981 | relax_end (); |
| 9982 | } |
| 9983 | else |
| 9984 | { |
| 9985 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 9986 | BFD_RELOC_MIPS_GOT_DISP, mips_gp_register); |
| 9987 | } |
| 9988 | } |
| 9989 | else if (mips_big_got && !HAVE_NEWABI) |
| 9990 | { |
| 9991 | int gpdelay; |
| 9992 | int lui_reloc_type = (int) BFD_RELOC_MIPS_GOT_HI16; |
| 9993 | int lw_reloc_type = (int) BFD_RELOC_MIPS_GOT_LO16; |
| 9994 | int local_reloc_type = (int) BFD_RELOC_MIPS_GOT16; |
| 9995 | |
| 9996 | /* This is the large GOT case. If this is a reference to an |
| 9997 | external symbol, and there is no constant, we want |
| 9998 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 9999 | addu $tempreg,$tempreg,$gp |
| 10000 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) |
| 10001 | or for lca or if tempreg is PIC_CALL_REG |
| 10002 | lui $tempreg,<sym> (BFD_RELOC_MIPS_CALL_HI16) |
| 10003 | addu $tempreg,$tempreg,$gp |
| 10004 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_CALL_LO16) |
| 10005 | For a local symbol, we want |
| 10006 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 10007 | nop |
| 10008 | addiu $tempreg,$tempreg,<sym> (BFD_RELOC_LO16) |
| 10009 | |
| 10010 | If we have a small constant, and this is a reference to |
| 10011 | an external symbol, we want |
| 10012 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 10013 | addu $tempreg,$tempreg,$gp |
| 10014 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) |
| 10015 | nop |
| 10016 | addiu $tempreg,$tempreg,<constant> |
| 10017 | For a local symbol, we want |
| 10018 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 10019 | nop |
| 10020 | addiu $tempreg,$tempreg,<constant> (BFD_RELOC_LO16) |
| 10021 | |
| 10022 | If we have a large constant, and this is a reference to |
| 10023 | an external symbol, we want |
| 10024 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 10025 | addu $tempreg,$tempreg,$gp |
| 10026 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) |
| 10027 | lui $at,<hiconstant> |
| 10028 | addiu $at,$at,<loconstant> |
| 10029 | addu $tempreg,$tempreg,$at |
| 10030 | For a local symbol, we want |
| 10031 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 10032 | lui $at,<hiconstant> |
| 10033 | addiu $at,$at,<loconstant> (BFD_RELOC_LO16) |
| 10034 | addu $tempreg,$tempreg,$at |
| 10035 | */ |
| 10036 | |
| 10037 | expr1.X_add_number = offset_expr.X_add_number; |
| 10038 | offset_expr.X_add_number = 0; |
| 10039 | relax_start (offset_expr.X_add_symbol); |
| 10040 | gpdelay = reg_needs_delay (mips_gp_register); |
| 10041 | if (expr1.X_add_number == 0 && breg == 0 |
| 10042 | && (call || tempreg == PIC_CALL_REG)) |
| 10043 | { |
| 10044 | lui_reloc_type = (int) BFD_RELOC_MIPS_CALL_HI16; |
| 10045 | lw_reloc_type = (int) BFD_RELOC_MIPS_CALL_LO16; |
| 10046 | } |
| 10047 | macro_build (&offset_expr, "lui", LUI_FMT, tempreg, lui_reloc_type); |
| 10048 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 10049 | tempreg, tempreg, mips_gp_register); |
| 10050 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 10051 | tempreg, lw_reloc_type, tempreg); |
| 10052 | if (expr1.X_add_number == 0) |
| 10053 | { |
| 10054 | if (breg != 0) |
| 10055 | { |
| 10056 | /* We're going to put in an addu instruction using |
| 10057 | tempreg, so we may as well insert the nop right |
| 10058 | now. */ |
| 10059 | load_delay_nop (); |
| 10060 | } |
| 10061 | } |
| 10062 | else if (expr1.X_add_number >= -0x8000 |
| 10063 | && expr1.X_add_number < 0x8000) |
| 10064 | { |
| 10065 | load_delay_nop (); |
| 10066 | macro_build (&expr1, ADDRESS_ADDI_INSN, "t,r,j", |
| 10067 | tempreg, tempreg, BFD_RELOC_LO16); |
| 10068 | } |
| 10069 | else |
| 10070 | { |
| 10071 | unsigned int dreg; |
| 10072 | |
| 10073 | /* If we are going to add in a base register, and the |
| 10074 | target register and the base register are the same, |
| 10075 | then we are using AT as a temporary register. Since |
| 10076 | we want to load the constant into AT, we add our |
| 10077 | current AT (from the global offset table) and the |
| 10078 | register into the register now, and pretend we were |
| 10079 | not using a base register. */ |
| 10080 | if (breg != op[0]) |
| 10081 | dreg = tempreg; |
| 10082 | else |
| 10083 | { |
| 10084 | gas_assert (tempreg == AT); |
| 10085 | load_delay_nop (); |
| 10086 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 10087 | op[0], AT, breg); |
| 10088 | dreg = op[0]; |
| 10089 | } |
| 10090 | |
| 10091 | load_register (AT, &expr1, HAVE_64BIT_ADDRESSES); |
| 10092 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", dreg, dreg, AT); |
| 10093 | |
| 10094 | used_at = 1; |
| 10095 | } |
| 10096 | offset_expr.X_add_number = SEXT_16BIT (expr1.X_add_number); |
| 10097 | relax_switch (); |
| 10098 | |
| 10099 | if (gpdelay) |
| 10100 | { |
| 10101 | /* This is needed because this instruction uses $gp, but |
| 10102 | the first instruction on the main stream does not. */ |
| 10103 | macro_build (NULL, "nop", ""); |
| 10104 | } |
| 10105 | |
| 10106 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 10107 | local_reloc_type, mips_gp_register); |
| 10108 | if (expr1.X_add_number >= -0x8000 |
| 10109 | && expr1.X_add_number < 0x8000) |
| 10110 | { |
| 10111 | load_delay_nop (); |
| 10112 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", |
| 10113 | tempreg, tempreg, BFD_RELOC_LO16); |
| 10114 | /* FIXME: If add_number is 0, and there was no base |
| 10115 | register, the external symbol case ended with a load, |
| 10116 | so if the symbol turns out to not be external, and |
| 10117 | the next instruction uses tempreg, an unnecessary nop |
| 10118 | will be inserted. */ |
| 10119 | } |
| 10120 | else |
| 10121 | { |
| 10122 | if (breg == op[0]) |
| 10123 | { |
| 10124 | /* We must add in the base register now, as in the |
| 10125 | external symbol case. */ |
| 10126 | gas_assert (tempreg == AT); |
| 10127 | load_delay_nop (); |
| 10128 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 10129 | op[0], AT, breg); |
| 10130 | tempreg = op[0]; |
| 10131 | /* We set breg to 0 because we have arranged to add |
| 10132 | it in in both cases. */ |
| 10133 | breg = 0; |
| 10134 | } |
| 10135 | |
| 10136 | macro_build_lui (&expr1, AT); |
| 10137 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", |
| 10138 | AT, AT, BFD_RELOC_LO16); |
| 10139 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 10140 | tempreg, tempreg, AT); |
| 10141 | used_at = 1; |
| 10142 | } |
| 10143 | relax_end (); |
| 10144 | } |
| 10145 | else if (mips_big_got && HAVE_NEWABI) |
| 10146 | { |
| 10147 | int lui_reloc_type = (int) BFD_RELOC_MIPS_GOT_HI16; |
| 10148 | int lw_reloc_type = (int) BFD_RELOC_MIPS_GOT_LO16; |
| 10149 | int add_breg_early = 0; |
| 10150 | |
| 10151 | /* This is the large GOT case. If this is a reference to an |
| 10152 | external symbol, and there is no constant, we want |
| 10153 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 10154 | add $tempreg,$tempreg,$gp |
| 10155 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) |
| 10156 | or for lca or if tempreg is PIC_CALL_REG |
| 10157 | lui $tempreg,<sym> (BFD_RELOC_MIPS_CALL_HI16) |
| 10158 | add $tempreg,$tempreg,$gp |
| 10159 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_CALL_LO16) |
| 10160 | |
| 10161 | If we have a small constant, and this is a reference to |
| 10162 | an external symbol, we want |
| 10163 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 10164 | add $tempreg,$tempreg,$gp |
| 10165 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) |
| 10166 | addi $tempreg,$tempreg,<constant> |
| 10167 | |
| 10168 | If we have a large constant, and this is a reference to |
| 10169 | an external symbol, we want |
| 10170 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 10171 | addu $tempreg,$tempreg,$gp |
| 10172 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) |
| 10173 | lui $at,<hiconstant> |
| 10174 | addi $at,$at,<loconstant> |
| 10175 | add $tempreg,$tempreg,$at |
| 10176 | |
| 10177 | If we have NewABI, and we know it's a local symbol, we want |
| 10178 | lw $reg,<sym>($gp) (BFD_RELOC_MIPS_GOT_PAGE) |
| 10179 | addiu $reg,$reg,<sym> (BFD_RELOC_MIPS_GOT_OFST) |
| 10180 | otherwise we have to resort to GOT_HI16/GOT_LO16. */ |
| 10181 | |
| 10182 | relax_start (offset_expr.X_add_symbol); |
| 10183 | |
| 10184 | expr1.X_add_number = offset_expr.X_add_number; |
| 10185 | offset_expr.X_add_number = 0; |
| 10186 | |
| 10187 | if (expr1.X_add_number == 0 && breg == 0 |
| 10188 | && (call || tempreg == PIC_CALL_REG)) |
| 10189 | { |
| 10190 | lui_reloc_type = (int) BFD_RELOC_MIPS_CALL_HI16; |
| 10191 | lw_reloc_type = (int) BFD_RELOC_MIPS_CALL_LO16; |
| 10192 | } |
| 10193 | macro_build (&offset_expr, "lui", LUI_FMT, tempreg, lui_reloc_type); |
| 10194 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 10195 | tempreg, tempreg, mips_gp_register); |
| 10196 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 10197 | tempreg, lw_reloc_type, tempreg); |
| 10198 | |
| 10199 | if (expr1.X_add_number == 0) |
| 10200 | ; |
| 10201 | else if (expr1.X_add_number >= -0x8000 |
| 10202 | && expr1.X_add_number < 0x8000) |
| 10203 | { |
| 10204 | macro_build (&expr1, ADDRESS_ADDI_INSN, "t,r,j", |
| 10205 | tempreg, tempreg, BFD_RELOC_LO16); |
| 10206 | } |
| 10207 | else if (IS_SEXT_32BIT_NUM (expr1.X_add_number + 0x8000)) |
| 10208 | { |
| 10209 | unsigned int dreg; |
| 10210 | |
| 10211 | /* If we are going to add in a base register, and the |
| 10212 | target register and the base register are the same, |
| 10213 | then we are using AT as a temporary register. Since |
| 10214 | we want to load the constant into AT, we add our |
| 10215 | current AT (from the global offset table) and the |
| 10216 | register into the register now, and pretend we were |
| 10217 | not using a base register. */ |
| 10218 | if (breg != op[0]) |
| 10219 | dreg = tempreg; |
| 10220 | else |
| 10221 | { |
| 10222 | gas_assert (tempreg == AT); |
| 10223 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 10224 | op[0], AT, breg); |
| 10225 | dreg = op[0]; |
| 10226 | add_breg_early = 1; |
| 10227 | } |
| 10228 | |
| 10229 | load_register (AT, &expr1, HAVE_64BIT_ADDRESSES); |
| 10230 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", dreg, dreg, AT); |
| 10231 | |
| 10232 | used_at = 1; |
| 10233 | } |
| 10234 | else |
| 10235 | as_bad (_("PIC code offset overflow (max 32 signed bits)")); |
| 10236 | |
| 10237 | relax_switch (); |
| 10238 | offset_expr.X_add_number = expr1.X_add_number; |
| 10239 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 10240 | BFD_RELOC_MIPS_GOT_PAGE, mips_gp_register); |
| 10241 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", tempreg, |
| 10242 | tempreg, BFD_RELOC_MIPS_GOT_OFST); |
| 10243 | if (add_breg_early) |
| 10244 | { |
| 10245 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 10246 | op[0], tempreg, breg); |
| 10247 | breg = 0; |
| 10248 | tempreg = op[0]; |
| 10249 | } |
| 10250 | relax_end (); |
| 10251 | } |
| 10252 | else |
| 10253 | abort (); |
| 10254 | |
| 10255 | if (breg != 0) |
| 10256 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", op[0], tempreg, breg); |
| 10257 | break; |
| 10258 | |
| 10259 | case M_MSGSND: |
| 10260 | gas_assert (!mips_opts.micromips); |
| 10261 | macro_build (NULL, "c2", "C", (op[0] << 16) | 0x01); |
| 10262 | break; |
| 10263 | |
| 10264 | case M_MSGLD: |
| 10265 | gas_assert (!mips_opts.micromips); |
| 10266 | macro_build (NULL, "c2", "C", 0x02); |
| 10267 | break; |
| 10268 | |
| 10269 | case M_MSGLD_T: |
| 10270 | gas_assert (!mips_opts.micromips); |
| 10271 | macro_build (NULL, "c2", "C", (op[0] << 16) | 0x02); |
| 10272 | break; |
| 10273 | |
| 10274 | case M_MSGWAIT: |
| 10275 | gas_assert (!mips_opts.micromips); |
| 10276 | macro_build (NULL, "c2", "C", 3); |
| 10277 | break; |
| 10278 | |
| 10279 | case M_MSGWAIT_T: |
| 10280 | gas_assert (!mips_opts.micromips); |
| 10281 | macro_build (NULL, "c2", "C", (op[0] << 16) | 0x03); |
| 10282 | break; |
| 10283 | |
| 10284 | case M_J_A: |
| 10285 | /* The j instruction may not be used in PIC code, since it |
| 10286 | requires an absolute address. We convert it to a b |
| 10287 | instruction. */ |
| 10288 | if (mips_pic == NO_PIC) |
| 10289 | macro_build (&offset_expr, "j", "a"); |
| 10290 | else |
| 10291 | macro_build (&offset_expr, "b", "p"); |
| 10292 | break; |
| 10293 | |
| 10294 | /* The jal instructions must be handled as macros because when |
| 10295 | generating PIC code they expand to multi-instruction |
| 10296 | sequences. Normally they are simple instructions. */ |
| 10297 | case M_JALS_1: |
| 10298 | op[1] = op[0]; |
| 10299 | op[0] = RA; |
| 10300 | /* Fall through. */ |
| 10301 | case M_JALS_2: |
| 10302 | gas_assert (mips_opts.micromips); |
| 10303 | if (mips_opts.insn32) |
| 10304 | { |
| 10305 | as_bad (_("opcode not supported in the `insn32' mode `%s'"), str); |
| 10306 | break; |
| 10307 | } |
| 10308 | jals = 1; |
| 10309 | goto jal; |
| 10310 | case M_JAL_1: |
| 10311 | op[1] = op[0]; |
| 10312 | op[0] = RA; |
| 10313 | /* Fall through. */ |
| 10314 | case M_JAL_2: |
| 10315 | jal: |
| 10316 | if (mips_pic == NO_PIC) |
| 10317 | { |
| 10318 | s = jals ? "jalrs" : "jalr"; |
| 10319 | if (mips_opts.micromips |
| 10320 | && !mips_opts.insn32 |
| 10321 | && op[0] == RA |
| 10322 | && !(history[0].insn_mo->pinfo2 & INSN2_BRANCH_DELAY_32BIT)) |
| 10323 | macro_build (NULL, s, "mj", op[1]); |
| 10324 | else |
| 10325 | macro_build (NULL, s, JALR_FMT, op[0], op[1]); |
| 10326 | } |
| 10327 | else |
| 10328 | { |
| 10329 | int cprestore = (mips_pic == SVR4_PIC && !HAVE_NEWABI |
| 10330 | && mips_cprestore_offset >= 0); |
| 10331 | |
| 10332 | if (op[1] != PIC_CALL_REG) |
| 10333 | as_warn (_("MIPS PIC call to register other than $25")); |
| 10334 | |
| 10335 | s = ((mips_opts.micromips |
| 10336 | && !mips_opts.insn32 |
| 10337 | && (!mips_opts.noreorder || cprestore)) |
| 10338 | ? "jalrs" : "jalr"); |
| 10339 | if (mips_opts.micromips |
| 10340 | && !mips_opts.insn32 |
| 10341 | && op[0] == RA |
| 10342 | && !(history[0].insn_mo->pinfo2 & INSN2_BRANCH_DELAY_32BIT)) |
| 10343 | macro_build (NULL, s, "mj", op[1]); |
| 10344 | else |
| 10345 | macro_build (NULL, s, JALR_FMT, op[0], op[1]); |
| 10346 | if (mips_pic == SVR4_PIC && !HAVE_NEWABI) |
| 10347 | { |
| 10348 | if (mips_cprestore_offset < 0) |
| 10349 | as_warn (_("no .cprestore pseudo-op used in PIC code")); |
| 10350 | else |
| 10351 | { |
| 10352 | if (!mips_frame_reg_valid) |
| 10353 | { |
| 10354 | as_warn (_("no .frame pseudo-op used in PIC code")); |
| 10355 | /* Quiet this warning. */ |
| 10356 | mips_frame_reg_valid = 1; |
| 10357 | } |
| 10358 | if (!mips_cprestore_valid) |
| 10359 | { |
| 10360 | as_warn (_("no .cprestore pseudo-op used in PIC code")); |
| 10361 | /* Quiet this warning. */ |
| 10362 | mips_cprestore_valid = 1; |
| 10363 | } |
| 10364 | if (mips_opts.noreorder) |
| 10365 | macro_build (NULL, "nop", ""); |
| 10366 | expr1.X_add_number = mips_cprestore_offset; |
| 10367 | macro_build_ldst_constoffset (&expr1, ADDRESS_LOAD_INSN, |
| 10368 | mips_gp_register, |
| 10369 | mips_frame_reg, |
| 10370 | HAVE_64BIT_ADDRESSES); |
| 10371 | } |
| 10372 | } |
| 10373 | } |
| 10374 | |
| 10375 | break; |
| 10376 | |
| 10377 | case M_JALS_A: |
| 10378 | gas_assert (mips_opts.micromips); |
| 10379 | if (mips_opts.insn32) |
| 10380 | { |
| 10381 | as_bad (_("opcode not supported in the `insn32' mode `%s'"), str); |
| 10382 | break; |
| 10383 | } |
| 10384 | jals = 1; |
| 10385 | /* Fall through. */ |
| 10386 | case M_JAL_A: |
| 10387 | if (mips_pic == NO_PIC) |
| 10388 | macro_build (&offset_expr, jals ? "jals" : "jal", "a"); |
| 10389 | else if (mips_pic == SVR4_PIC) |
| 10390 | { |
| 10391 | /* If this is a reference to an external symbol, and we are |
| 10392 | using a small GOT, we want |
| 10393 | lw $25,<sym>($gp) (BFD_RELOC_MIPS_CALL16) |
| 10394 | nop |
| 10395 | jalr $ra,$25 |
| 10396 | nop |
| 10397 | lw $gp,cprestore($sp) |
| 10398 | The cprestore value is set using the .cprestore |
| 10399 | pseudo-op. If we are using a big GOT, we want |
| 10400 | lui $25,<sym> (BFD_RELOC_MIPS_CALL_HI16) |
| 10401 | addu $25,$25,$gp |
| 10402 | lw $25,<sym>($25) (BFD_RELOC_MIPS_CALL_LO16) |
| 10403 | nop |
| 10404 | jalr $ra,$25 |
| 10405 | nop |
| 10406 | lw $gp,cprestore($sp) |
| 10407 | If the symbol is not external, we want |
| 10408 | lw $25,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 10409 | nop |
| 10410 | addiu $25,$25,<sym> (BFD_RELOC_LO16) |
| 10411 | jalr $ra,$25 |
| 10412 | nop |
| 10413 | lw $gp,cprestore($sp) |
| 10414 | |
| 10415 | For NewABI, we use the same CALL16 or CALL_HI16/CALL_LO16 |
| 10416 | sequences above, minus nops, unless the symbol is local, |
| 10417 | which enables us to use GOT_PAGE/GOT_OFST (big got) or |
| 10418 | GOT_DISP. */ |
| 10419 | if (HAVE_NEWABI) |
| 10420 | { |
| 10421 | if (!mips_big_got) |
| 10422 | { |
| 10423 | relax_start (offset_expr.X_add_symbol); |
| 10424 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 10425 | PIC_CALL_REG, BFD_RELOC_MIPS_CALL16, |
| 10426 | mips_gp_register); |
| 10427 | relax_switch (); |
| 10428 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 10429 | PIC_CALL_REG, BFD_RELOC_MIPS_GOT_DISP, |
| 10430 | mips_gp_register); |
| 10431 | relax_end (); |
| 10432 | } |
| 10433 | else |
| 10434 | { |
| 10435 | relax_start (offset_expr.X_add_symbol); |
| 10436 | macro_build (&offset_expr, "lui", LUI_FMT, PIC_CALL_REG, |
| 10437 | BFD_RELOC_MIPS_CALL_HI16); |
| 10438 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", PIC_CALL_REG, |
| 10439 | PIC_CALL_REG, mips_gp_register); |
| 10440 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 10441 | PIC_CALL_REG, BFD_RELOC_MIPS_CALL_LO16, |
| 10442 | PIC_CALL_REG); |
| 10443 | relax_switch (); |
| 10444 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 10445 | PIC_CALL_REG, BFD_RELOC_MIPS_GOT_PAGE, |
| 10446 | mips_gp_register); |
| 10447 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", |
| 10448 | PIC_CALL_REG, PIC_CALL_REG, |
| 10449 | BFD_RELOC_MIPS_GOT_OFST); |
| 10450 | relax_end (); |
| 10451 | } |
| 10452 | |
| 10453 | macro_build_jalr (&offset_expr, 0); |
| 10454 | } |
| 10455 | else |
| 10456 | { |
| 10457 | relax_start (offset_expr.X_add_symbol); |
| 10458 | if (!mips_big_got) |
| 10459 | { |
| 10460 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 10461 | PIC_CALL_REG, BFD_RELOC_MIPS_CALL16, |
| 10462 | mips_gp_register); |
| 10463 | load_delay_nop (); |
| 10464 | relax_switch (); |
| 10465 | } |
| 10466 | else |
| 10467 | { |
| 10468 | int gpdelay; |
| 10469 | |
| 10470 | gpdelay = reg_needs_delay (mips_gp_register); |
| 10471 | macro_build (&offset_expr, "lui", LUI_FMT, PIC_CALL_REG, |
| 10472 | BFD_RELOC_MIPS_CALL_HI16); |
| 10473 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", PIC_CALL_REG, |
| 10474 | PIC_CALL_REG, mips_gp_register); |
| 10475 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 10476 | PIC_CALL_REG, BFD_RELOC_MIPS_CALL_LO16, |
| 10477 | PIC_CALL_REG); |
| 10478 | load_delay_nop (); |
| 10479 | relax_switch (); |
| 10480 | if (gpdelay) |
| 10481 | macro_build (NULL, "nop", ""); |
| 10482 | } |
| 10483 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 10484 | PIC_CALL_REG, BFD_RELOC_MIPS_GOT16, |
| 10485 | mips_gp_register); |
| 10486 | load_delay_nop (); |
| 10487 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", |
| 10488 | PIC_CALL_REG, PIC_CALL_REG, BFD_RELOC_LO16); |
| 10489 | relax_end (); |
| 10490 | macro_build_jalr (&offset_expr, mips_cprestore_offset >= 0); |
| 10491 | |
| 10492 | if (mips_cprestore_offset < 0) |
| 10493 | as_warn (_("no .cprestore pseudo-op used in PIC code")); |
| 10494 | else |
| 10495 | { |
| 10496 | if (!mips_frame_reg_valid) |
| 10497 | { |
| 10498 | as_warn (_("no .frame pseudo-op used in PIC code")); |
| 10499 | /* Quiet this warning. */ |
| 10500 | mips_frame_reg_valid = 1; |
| 10501 | } |
| 10502 | if (!mips_cprestore_valid) |
| 10503 | { |
| 10504 | as_warn (_("no .cprestore pseudo-op used in PIC code")); |
| 10505 | /* Quiet this warning. */ |
| 10506 | mips_cprestore_valid = 1; |
| 10507 | } |
| 10508 | if (mips_opts.noreorder) |
| 10509 | macro_build (NULL, "nop", ""); |
| 10510 | expr1.X_add_number = mips_cprestore_offset; |
| 10511 | macro_build_ldst_constoffset (&expr1, ADDRESS_LOAD_INSN, |
| 10512 | mips_gp_register, |
| 10513 | mips_frame_reg, |
| 10514 | HAVE_64BIT_ADDRESSES); |
| 10515 | } |
| 10516 | } |
| 10517 | } |
| 10518 | else if (mips_pic == VXWORKS_PIC) |
| 10519 | as_bad (_("non-PIC jump used in PIC library")); |
| 10520 | else |
| 10521 | abort (); |
| 10522 | |
| 10523 | break; |
| 10524 | |
| 10525 | case M_LBUE_AB: |
| 10526 | s = "lbue"; |
| 10527 | fmt = "t,+j(b)"; |
| 10528 | offbits = 9; |
| 10529 | goto ld_st; |
| 10530 | case M_LHUE_AB: |
| 10531 | s = "lhue"; |
| 10532 | fmt = "t,+j(b)"; |
| 10533 | offbits = 9; |
| 10534 | goto ld_st; |
| 10535 | case M_LBE_AB: |
| 10536 | s = "lbe"; |
| 10537 | fmt = "t,+j(b)"; |
| 10538 | offbits = 9; |
| 10539 | goto ld_st; |
| 10540 | case M_LHE_AB: |
| 10541 | s = "lhe"; |
| 10542 | fmt = "t,+j(b)"; |
| 10543 | offbits = 9; |
| 10544 | goto ld_st; |
| 10545 | case M_LLE_AB: |
| 10546 | s = "lle"; |
| 10547 | fmt = "t,+j(b)"; |
| 10548 | offbits = 9; |
| 10549 | goto ld_st; |
| 10550 | case M_LWE_AB: |
| 10551 | s = "lwe"; |
| 10552 | fmt = "t,+j(b)"; |
| 10553 | offbits = 9; |
| 10554 | goto ld_st; |
| 10555 | case M_LWLE_AB: |
| 10556 | s = "lwle"; |
| 10557 | fmt = "t,+j(b)"; |
| 10558 | offbits = 9; |
| 10559 | goto ld_st; |
| 10560 | case M_LWRE_AB: |
| 10561 | s = "lwre"; |
| 10562 | fmt = "t,+j(b)"; |
| 10563 | offbits = 9; |
| 10564 | goto ld_st; |
| 10565 | case M_SBE_AB: |
| 10566 | s = "sbe"; |
| 10567 | fmt = "t,+j(b)"; |
| 10568 | offbits = 9; |
| 10569 | goto ld_st; |
| 10570 | case M_SCE_AB: |
| 10571 | s = "sce"; |
| 10572 | fmt = "t,+j(b)"; |
| 10573 | offbits = 9; |
| 10574 | goto ld_st; |
| 10575 | case M_SHE_AB: |
| 10576 | s = "she"; |
| 10577 | fmt = "t,+j(b)"; |
| 10578 | offbits = 9; |
| 10579 | goto ld_st; |
| 10580 | case M_SWE_AB: |
| 10581 | s = "swe"; |
| 10582 | fmt = "t,+j(b)"; |
| 10583 | offbits = 9; |
| 10584 | goto ld_st; |
| 10585 | case M_SWLE_AB: |
| 10586 | s = "swle"; |
| 10587 | fmt = "t,+j(b)"; |
| 10588 | offbits = 9; |
| 10589 | goto ld_st; |
| 10590 | case M_SWRE_AB: |
| 10591 | s = "swre"; |
| 10592 | fmt = "t,+j(b)"; |
| 10593 | offbits = 9; |
| 10594 | goto ld_st; |
| 10595 | case M_ACLR_AB: |
| 10596 | s = "aclr"; |
| 10597 | fmt = "\\,~(b)"; |
| 10598 | offbits = 12; |
| 10599 | goto ld_st; |
| 10600 | case M_ASET_AB: |
| 10601 | s = "aset"; |
| 10602 | fmt = "\\,~(b)"; |
| 10603 | offbits = 12; |
| 10604 | goto ld_st; |
| 10605 | case M_LB_AB: |
| 10606 | s = "lb"; |
| 10607 | fmt = "t,o(b)"; |
| 10608 | goto ld; |
| 10609 | case M_LBU_AB: |
| 10610 | s = "lbu"; |
| 10611 | fmt = "t,o(b)"; |
| 10612 | goto ld; |
| 10613 | case M_LH_AB: |
| 10614 | s = "lh"; |
| 10615 | fmt = "t,o(b)"; |
| 10616 | goto ld; |
| 10617 | case M_LHU_AB: |
| 10618 | s = "lhu"; |
| 10619 | fmt = "t,o(b)"; |
| 10620 | goto ld; |
| 10621 | case M_LW_AB: |
| 10622 | s = "lw"; |
| 10623 | fmt = "t,o(b)"; |
| 10624 | goto ld; |
| 10625 | case M_LWC0_AB: |
| 10626 | gas_assert (!mips_opts.micromips); |
| 10627 | s = "lwc0"; |
| 10628 | fmt = "E,o(b)"; |
| 10629 | /* Itbl support may require additional care here. */ |
| 10630 | coproc = 1; |
| 10631 | goto ld_st; |
| 10632 | case M_LWC1_AB: |
| 10633 | s = "lwc1"; |
| 10634 | fmt = "T,o(b)"; |
| 10635 | /* Itbl support may require additional care here. */ |
| 10636 | coproc = 1; |
| 10637 | goto ld_st; |
| 10638 | case M_LWC2_AB: |
| 10639 | s = "lwc2"; |
| 10640 | fmt = COP12_FMT; |
| 10641 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10642 | /* Itbl support may require additional care here. */ |
| 10643 | coproc = 1; |
| 10644 | goto ld_st; |
| 10645 | case M_LWC3_AB: |
| 10646 | gas_assert (!mips_opts.micromips); |
| 10647 | s = "lwc3"; |
| 10648 | fmt = "E,o(b)"; |
| 10649 | /* Itbl support may require additional care here. */ |
| 10650 | coproc = 1; |
| 10651 | goto ld_st; |
| 10652 | case M_LWL_AB: |
| 10653 | s = "lwl"; |
| 10654 | fmt = MEM12_FMT; |
| 10655 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10656 | goto ld_st; |
| 10657 | case M_LWR_AB: |
| 10658 | s = "lwr"; |
| 10659 | fmt = MEM12_FMT; |
| 10660 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10661 | goto ld_st; |
| 10662 | case M_LDC1_AB: |
| 10663 | s = "ldc1"; |
| 10664 | fmt = "T,o(b)"; |
| 10665 | /* Itbl support may require additional care here. */ |
| 10666 | coproc = 1; |
| 10667 | goto ld_st; |
| 10668 | case M_LDC2_AB: |
| 10669 | s = "ldc2"; |
| 10670 | fmt = COP12_FMT; |
| 10671 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10672 | /* Itbl support may require additional care here. */ |
| 10673 | coproc = 1; |
| 10674 | goto ld_st; |
| 10675 | case M_LQC2_AB: |
| 10676 | s = "lqc2"; |
| 10677 | fmt = "+7,o(b)"; |
| 10678 | /* Itbl support may require additional care here. */ |
| 10679 | coproc = 1; |
| 10680 | goto ld_st; |
| 10681 | case M_LDC3_AB: |
| 10682 | s = "ldc3"; |
| 10683 | fmt = "E,o(b)"; |
| 10684 | /* Itbl support may require additional care here. */ |
| 10685 | coproc = 1; |
| 10686 | goto ld_st; |
| 10687 | case M_LDL_AB: |
| 10688 | s = "ldl"; |
| 10689 | fmt = MEM12_FMT; |
| 10690 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10691 | goto ld_st; |
| 10692 | case M_LDR_AB: |
| 10693 | s = "ldr"; |
| 10694 | fmt = MEM12_FMT; |
| 10695 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10696 | goto ld_st; |
| 10697 | case M_LL_AB: |
| 10698 | s = "ll"; |
| 10699 | fmt = MEM12_FMT; |
| 10700 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10701 | goto ld; |
| 10702 | case M_LLD_AB: |
| 10703 | s = "lld"; |
| 10704 | fmt = MEM12_FMT; |
| 10705 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10706 | goto ld; |
| 10707 | case M_LWU_AB: |
| 10708 | s = "lwu"; |
| 10709 | fmt = MEM12_FMT; |
| 10710 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10711 | goto ld; |
| 10712 | case M_LWP_AB: |
| 10713 | gas_assert (mips_opts.micromips); |
| 10714 | s = "lwp"; |
| 10715 | fmt = "t,~(b)"; |
| 10716 | offbits = 12; |
| 10717 | lp = 1; |
| 10718 | goto ld; |
| 10719 | case M_LDP_AB: |
| 10720 | gas_assert (mips_opts.micromips); |
| 10721 | s = "ldp"; |
| 10722 | fmt = "t,~(b)"; |
| 10723 | offbits = 12; |
| 10724 | lp = 1; |
| 10725 | goto ld; |
| 10726 | case M_LWM_AB: |
| 10727 | gas_assert (mips_opts.micromips); |
| 10728 | s = "lwm"; |
| 10729 | fmt = "n,~(b)"; |
| 10730 | offbits = 12; |
| 10731 | goto ld_st; |
| 10732 | case M_LDM_AB: |
| 10733 | gas_assert (mips_opts.micromips); |
| 10734 | s = "ldm"; |
| 10735 | fmt = "n,~(b)"; |
| 10736 | offbits = 12; |
| 10737 | goto ld_st; |
| 10738 | |
| 10739 | ld: |
| 10740 | /* We don't want to use $0 as tempreg. */ |
| 10741 | if (op[2] == op[0] + lp || op[0] + lp == ZERO) |
| 10742 | goto ld_st; |
| 10743 | else |
| 10744 | tempreg = op[0] + lp; |
| 10745 | goto ld_noat; |
| 10746 | |
| 10747 | case M_SB_AB: |
| 10748 | s = "sb"; |
| 10749 | fmt = "t,o(b)"; |
| 10750 | goto ld_st; |
| 10751 | case M_SH_AB: |
| 10752 | s = "sh"; |
| 10753 | fmt = "t,o(b)"; |
| 10754 | goto ld_st; |
| 10755 | case M_SW_AB: |
| 10756 | s = "sw"; |
| 10757 | fmt = "t,o(b)"; |
| 10758 | goto ld_st; |
| 10759 | case M_SWC0_AB: |
| 10760 | gas_assert (!mips_opts.micromips); |
| 10761 | s = "swc0"; |
| 10762 | fmt = "E,o(b)"; |
| 10763 | /* Itbl support may require additional care here. */ |
| 10764 | coproc = 1; |
| 10765 | goto ld_st; |
| 10766 | case M_SWC1_AB: |
| 10767 | s = "swc1"; |
| 10768 | fmt = "T,o(b)"; |
| 10769 | /* Itbl support may require additional care here. */ |
| 10770 | coproc = 1; |
| 10771 | goto ld_st; |
| 10772 | case M_SWC2_AB: |
| 10773 | s = "swc2"; |
| 10774 | fmt = COP12_FMT; |
| 10775 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10776 | /* Itbl support may require additional care here. */ |
| 10777 | coproc = 1; |
| 10778 | goto ld_st; |
| 10779 | case M_SWC3_AB: |
| 10780 | gas_assert (!mips_opts.micromips); |
| 10781 | s = "swc3"; |
| 10782 | fmt = "E,o(b)"; |
| 10783 | /* Itbl support may require additional care here. */ |
| 10784 | coproc = 1; |
| 10785 | goto ld_st; |
| 10786 | case M_SWL_AB: |
| 10787 | s = "swl"; |
| 10788 | fmt = MEM12_FMT; |
| 10789 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10790 | goto ld_st; |
| 10791 | case M_SWR_AB: |
| 10792 | s = "swr"; |
| 10793 | fmt = MEM12_FMT; |
| 10794 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10795 | goto ld_st; |
| 10796 | case M_SC_AB: |
| 10797 | s = "sc"; |
| 10798 | fmt = MEM12_FMT; |
| 10799 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10800 | goto ld_st; |
| 10801 | case M_SCD_AB: |
| 10802 | s = "scd"; |
| 10803 | fmt = MEM12_FMT; |
| 10804 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10805 | goto ld_st; |
| 10806 | case M_CACHE_AB: |
| 10807 | s = "cache"; |
| 10808 | fmt = mips_opts.micromips ? "k,~(b)" : "k,o(b)"; |
| 10809 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10810 | goto ld_st; |
| 10811 | case M_CACHEE_AB: |
| 10812 | s = "cachee"; |
| 10813 | fmt = "k,+j(b)"; |
| 10814 | offbits = 9; |
| 10815 | goto ld_st; |
| 10816 | case M_PREF_AB: |
| 10817 | s = "pref"; |
| 10818 | fmt = !mips_opts.micromips ? "k,o(b)" : "k,~(b)"; |
| 10819 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10820 | goto ld_st; |
| 10821 | case M_PREFE_AB: |
| 10822 | s = "prefe"; |
| 10823 | fmt = "k,+j(b)"; |
| 10824 | offbits = 9; |
| 10825 | goto ld_st; |
| 10826 | case M_SDC1_AB: |
| 10827 | s = "sdc1"; |
| 10828 | fmt = "T,o(b)"; |
| 10829 | coproc = 1; |
| 10830 | /* Itbl support may require additional care here. */ |
| 10831 | goto ld_st; |
| 10832 | case M_SDC2_AB: |
| 10833 | s = "sdc2"; |
| 10834 | fmt = COP12_FMT; |
| 10835 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10836 | /* Itbl support may require additional care here. */ |
| 10837 | coproc = 1; |
| 10838 | goto ld_st; |
| 10839 | case M_SQC2_AB: |
| 10840 | s = "sqc2"; |
| 10841 | fmt = "+7,o(b)"; |
| 10842 | /* Itbl support may require additional care here. */ |
| 10843 | coproc = 1; |
| 10844 | goto ld_st; |
| 10845 | case M_SDC3_AB: |
| 10846 | gas_assert (!mips_opts.micromips); |
| 10847 | s = "sdc3"; |
| 10848 | fmt = "E,o(b)"; |
| 10849 | /* Itbl support may require additional care here. */ |
| 10850 | coproc = 1; |
| 10851 | goto ld_st; |
| 10852 | case M_SDL_AB: |
| 10853 | s = "sdl"; |
| 10854 | fmt = MEM12_FMT; |
| 10855 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10856 | goto ld_st; |
| 10857 | case M_SDR_AB: |
| 10858 | s = "sdr"; |
| 10859 | fmt = MEM12_FMT; |
| 10860 | offbits = (mips_opts.micromips ? 12 : 16); |
| 10861 | goto ld_st; |
| 10862 | case M_SWP_AB: |
| 10863 | gas_assert (mips_opts.micromips); |
| 10864 | s = "swp"; |
| 10865 | fmt = "t,~(b)"; |
| 10866 | offbits = 12; |
| 10867 | goto ld_st; |
| 10868 | case M_SDP_AB: |
| 10869 | gas_assert (mips_opts.micromips); |
| 10870 | s = "sdp"; |
| 10871 | fmt = "t,~(b)"; |
| 10872 | offbits = 12; |
| 10873 | goto ld_st; |
| 10874 | case M_SWM_AB: |
| 10875 | gas_assert (mips_opts.micromips); |
| 10876 | s = "swm"; |
| 10877 | fmt = "n,~(b)"; |
| 10878 | offbits = 12; |
| 10879 | goto ld_st; |
| 10880 | case M_SDM_AB: |
| 10881 | gas_assert (mips_opts.micromips); |
| 10882 | s = "sdm"; |
| 10883 | fmt = "n,~(b)"; |
| 10884 | offbits = 12; |
| 10885 | |
| 10886 | ld_st: |
| 10887 | tempreg = AT; |
| 10888 | ld_noat: |
| 10889 | breg = op[2]; |
| 10890 | if (small_offset_p (0, align, 16)) |
| 10891 | { |
| 10892 | /* The first case exists for M_LD_AB and M_SD_AB, which are |
| 10893 | macros for o32 but which should act like normal instructions |
| 10894 | otherwise. */ |
| 10895 | if (offbits == 16) |
| 10896 | macro_build (&offset_expr, s, fmt, op[0], -1, offset_reloc[0], |
| 10897 | offset_reloc[1], offset_reloc[2], breg); |
| 10898 | else if (small_offset_p (0, align, offbits)) |
| 10899 | { |
| 10900 | if (offbits == 0) |
| 10901 | macro_build (NULL, s, fmt, op[0], breg); |
| 10902 | else |
| 10903 | macro_build (NULL, s, fmt, op[0], |
| 10904 | (int) offset_expr.X_add_number, breg); |
| 10905 | } |
| 10906 | else |
| 10907 | { |
| 10908 | if (tempreg == AT) |
| 10909 | used_at = 1; |
| 10910 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", |
| 10911 | tempreg, breg, -1, offset_reloc[0], |
| 10912 | offset_reloc[1], offset_reloc[2]); |
| 10913 | if (offbits == 0) |
| 10914 | macro_build (NULL, s, fmt, op[0], tempreg); |
| 10915 | else |
| 10916 | macro_build (NULL, s, fmt, op[0], 0, tempreg); |
| 10917 | } |
| 10918 | break; |
| 10919 | } |
| 10920 | |
| 10921 | if (tempreg == AT) |
| 10922 | used_at = 1; |
| 10923 | |
| 10924 | if (offset_expr.X_op != O_constant |
| 10925 | && offset_expr.X_op != O_symbol) |
| 10926 | { |
| 10927 | as_bad (_("expression too complex")); |
| 10928 | offset_expr.X_op = O_constant; |
| 10929 | } |
| 10930 | |
| 10931 | if (HAVE_32BIT_ADDRESSES |
| 10932 | && !IS_SEXT_32BIT_NUM (offset_expr.X_add_number)) |
| 10933 | { |
| 10934 | char value [32]; |
| 10935 | |
| 10936 | sprintf_vma (value, offset_expr.X_add_number); |
| 10937 | as_bad (_("number (0x%s) larger than 32 bits"), value); |
| 10938 | } |
| 10939 | |
| 10940 | /* A constant expression in PIC code can be handled just as it |
| 10941 | is in non PIC code. */ |
| 10942 | if (offset_expr.X_op == O_constant) |
| 10943 | { |
| 10944 | expr1.X_add_number = offset_high_part (offset_expr.X_add_number, |
| 10945 | offbits == 0 ? 16 : offbits); |
| 10946 | offset_expr.X_add_number -= expr1.X_add_number; |
| 10947 | |
| 10948 | load_register (tempreg, &expr1, HAVE_64BIT_ADDRESSES); |
| 10949 | if (breg != 0) |
| 10950 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 10951 | tempreg, tempreg, breg); |
| 10952 | if (offbits == 0) |
| 10953 | { |
| 10954 | if (offset_expr.X_add_number != 0) |
| 10955 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, |
| 10956 | "t,r,j", tempreg, tempreg, BFD_RELOC_LO16); |
| 10957 | macro_build (NULL, s, fmt, op[0], tempreg); |
| 10958 | } |
| 10959 | else if (offbits == 16) |
| 10960 | macro_build (&offset_expr, s, fmt, op[0], BFD_RELOC_LO16, tempreg); |
| 10961 | else |
| 10962 | macro_build (NULL, s, fmt, op[0], |
| 10963 | (int) offset_expr.X_add_number, tempreg); |
| 10964 | } |
| 10965 | else if (offbits != 16) |
| 10966 | { |
| 10967 | /* The offset field is too narrow to be used for a low-part |
| 10968 | relocation, so load the whole address into the auxillary |
| 10969 | register. */ |
| 10970 | load_address (tempreg, &offset_expr, &used_at); |
| 10971 | if (breg != 0) |
| 10972 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 10973 | tempreg, tempreg, breg); |
| 10974 | if (offbits == 0) |
| 10975 | macro_build (NULL, s, fmt, op[0], tempreg); |
| 10976 | else |
| 10977 | macro_build (NULL, s, fmt, op[0], 0, tempreg); |
| 10978 | } |
| 10979 | else if (mips_pic == NO_PIC) |
| 10980 | { |
| 10981 | /* If this is a reference to a GP relative symbol, and there |
| 10982 | is no base register, we want |
| 10983 | <op> op[0],<sym>($gp) (BFD_RELOC_GPREL16) |
| 10984 | Otherwise, if there is no base register, we want |
| 10985 | lui $tempreg,<sym> (BFD_RELOC_HI16_S) |
| 10986 | <op> op[0],<sym>($tempreg) (BFD_RELOC_LO16) |
| 10987 | If we have a constant, we need two instructions anyhow, |
| 10988 | so we always use the latter form. |
| 10989 | |
| 10990 | If we have a base register, and this is a reference to a |
| 10991 | GP relative symbol, we want |
| 10992 | addu $tempreg,$breg,$gp |
| 10993 | <op> op[0],<sym>($tempreg) (BFD_RELOC_GPREL16) |
| 10994 | Otherwise we want |
| 10995 | lui $tempreg,<sym> (BFD_RELOC_HI16_S) |
| 10996 | addu $tempreg,$tempreg,$breg |
| 10997 | <op> op[0],<sym>($tempreg) (BFD_RELOC_LO16) |
| 10998 | With a constant we always use the latter case. |
| 10999 | |
| 11000 | With 64bit address space and no base register and $at usable, |
| 11001 | we want |
| 11002 | lui $tempreg,<sym> (BFD_RELOC_MIPS_HIGHEST) |
| 11003 | lui $at,<sym> (BFD_RELOC_HI16_S) |
| 11004 | daddiu $tempreg,<sym> (BFD_RELOC_MIPS_HIGHER) |
| 11005 | dsll32 $tempreg,0 |
| 11006 | daddu $tempreg,$at |
| 11007 | <op> op[0],<sym>($tempreg) (BFD_RELOC_LO16) |
| 11008 | If we have a base register, we want |
| 11009 | lui $tempreg,<sym> (BFD_RELOC_MIPS_HIGHEST) |
| 11010 | lui $at,<sym> (BFD_RELOC_HI16_S) |
| 11011 | daddiu $tempreg,<sym> (BFD_RELOC_MIPS_HIGHER) |
| 11012 | daddu $at,$breg |
| 11013 | dsll32 $tempreg,0 |
| 11014 | daddu $tempreg,$at |
| 11015 | <op> op[0],<sym>($tempreg) (BFD_RELOC_LO16) |
| 11016 | |
| 11017 | Without $at we can't generate the optimal path for superscalar |
| 11018 | processors here since this would require two temporary registers. |
| 11019 | lui $tempreg,<sym> (BFD_RELOC_MIPS_HIGHEST) |
| 11020 | daddiu $tempreg,<sym> (BFD_RELOC_MIPS_HIGHER) |
| 11021 | dsll $tempreg,16 |
| 11022 | daddiu $tempreg,<sym> (BFD_RELOC_HI16_S) |
| 11023 | dsll $tempreg,16 |
| 11024 | <op> op[0],<sym>($tempreg) (BFD_RELOC_LO16) |
| 11025 | If we have a base register, we want |
| 11026 | lui $tempreg,<sym> (BFD_RELOC_MIPS_HIGHEST) |
| 11027 | daddiu $tempreg,<sym> (BFD_RELOC_MIPS_HIGHER) |
| 11028 | dsll $tempreg,16 |
| 11029 | daddiu $tempreg,<sym> (BFD_RELOC_HI16_S) |
| 11030 | dsll $tempreg,16 |
| 11031 | daddu $tempreg,$tempreg,$breg |
| 11032 | <op> op[0],<sym>($tempreg) (BFD_RELOC_LO16) |
| 11033 | |
| 11034 | For GP relative symbols in 64bit address space we can use |
| 11035 | the same sequence as in 32bit address space. */ |
| 11036 | if (HAVE_64BIT_SYMBOLS) |
| 11037 | { |
| 11038 | if ((valueT) offset_expr.X_add_number <= MAX_GPREL_OFFSET |
| 11039 | && !nopic_need_relax (offset_expr.X_add_symbol, 1)) |
| 11040 | { |
| 11041 | relax_start (offset_expr.X_add_symbol); |
| 11042 | if (breg == 0) |
| 11043 | { |
| 11044 | macro_build (&offset_expr, s, fmt, op[0], |
| 11045 | BFD_RELOC_GPREL16, mips_gp_register); |
| 11046 | } |
| 11047 | else |
| 11048 | { |
| 11049 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 11050 | tempreg, breg, mips_gp_register); |
| 11051 | macro_build (&offset_expr, s, fmt, op[0], |
| 11052 | BFD_RELOC_GPREL16, tempreg); |
| 11053 | } |
| 11054 | relax_switch (); |
| 11055 | } |
| 11056 | |
| 11057 | if (used_at == 0 && mips_opts.at) |
| 11058 | { |
| 11059 | macro_build (&offset_expr, "lui", LUI_FMT, tempreg, |
| 11060 | BFD_RELOC_MIPS_HIGHEST); |
| 11061 | macro_build (&offset_expr, "lui", LUI_FMT, AT, |
| 11062 | BFD_RELOC_HI16_S); |
| 11063 | macro_build (&offset_expr, "daddiu", "t,r,j", tempreg, |
| 11064 | tempreg, BFD_RELOC_MIPS_HIGHER); |
| 11065 | if (breg != 0) |
| 11066 | macro_build (NULL, "daddu", "d,v,t", AT, AT, breg); |
| 11067 | macro_build (NULL, "dsll32", SHFT_FMT, tempreg, tempreg, 0); |
| 11068 | macro_build (NULL, "daddu", "d,v,t", tempreg, tempreg, AT); |
| 11069 | macro_build (&offset_expr, s, fmt, op[0], BFD_RELOC_LO16, |
| 11070 | tempreg); |
| 11071 | used_at = 1; |
| 11072 | } |
| 11073 | else |
| 11074 | { |
| 11075 | macro_build (&offset_expr, "lui", LUI_FMT, tempreg, |
| 11076 | BFD_RELOC_MIPS_HIGHEST); |
| 11077 | macro_build (&offset_expr, "daddiu", "t,r,j", tempreg, |
| 11078 | tempreg, BFD_RELOC_MIPS_HIGHER); |
| 11079 | macro_build (NULL, "dsll", SHFT_FMT, tempreg, tempreg, 16); |
| 11080 | macro_build (&offset_expr, "daddiu", "t,r,j", tempreg, |
| 11081 | tempreg, BFD_RELOC_HI16_S); |
| 11082 | macro_build (NULL, "dsll", SHFT_FMT, tempreg, tempreg, 16); |
| 11083 | if (breg != 0) |
| 11084 | macro_build (NULL, "daddu", "d,v,t", |
| 11085 | tempreg, tempreg, breg); |
| 11086 | macro_build (&offset_expr, s, fmt, op[0], |
| 11087 | BFD_RELOC_LO16, tempreg); |
| 11088 | } |
| 11089 | |
| 11090 | if (mips_relax.sequence) |
| 11091 | relax_end (); |
| 11092 | break; |
| 11093 | } |
| 11094 | |
| 11095 | if (breg == 0) |
| 11096 | { |
| 11097 | if ((valueT) offset_expr.X_add_number <= MAX_GPREL_OFFSET |
| 11098 | && !nopic_need_relax (offset_expr.X_add_symbol, 1)) |
| 11099 | { |
| 11100 | relax_start (offset_expr.X_add_symbol); |
| 11101 | macro_build (&offset_expr, s, fmt, op[0], BFD_RELOC_GPREL16, |
| 11102 | mips_gp_register); |
| 11103 | relax_switch (); |
| 11104 | } |
| 11105 | macro_build_lui (&offset_expr, tempreg); |
| 11106 | macro_build (&offset_expr, s, fmt, op[0], |
| 11107 | BFD_RELOC_LO16, tempreg); |
| 11108 | if (mips_relax.sequence) |
| 11109 | relax_end (); |
| 11110 | } |
| 11111 | else |
| 11112 | { |
| 11113 | if ((valueT) offset_expr.X_add_number <= MAX_GPREL_OFFSET |
| 11114 | && !nopic_need_relax (offset_expr.X_add_symbol, 1)) |
| 11115 | { |
| 11116 | relax_start (offset_expr.X_add_symbol); |
| 11117 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 11118 | tempreg, breg, mips_gp_register); |
| 11119 | macro_build (&offset_expr, s, fmt, op[0], |
| 11120 | BFD_RELOC_GPREL16, tempreg); |
| 11121 | relax_switch (); |
| 11122 | } |
| 11123 | macro_build_lui (&offset_expr, tempreg); |
| 11124 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 11125 | tempreg, tempreg, breg); |
| 11126 | macro_build (&offset_expr, s, fmt, op[0], |
| 11127 | BFD_RELOC_LO16, tempreg); |
| 11128 | if (mips_relax.sequence) |
| 11129 | relax_end (); |
| 11130 | } |
| 11131 | } |
| 11132 | else if (!mips_big_got) |
| 11133 | { |
| 11134 | int lw_reloc_type = (int) BFD_RELOC_MIPS_GOT16; |
| 11135 | |
| 11136 | /* If this is a reference to an external symbol, we want |
| 11137 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 11138 | nop |
| 11139 | <op> op[0],0($tempreg) |
| 11140 | Otherwise we want |
| 11141 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 11142 | nop |
| 11143 | addiu $tempreg,$tempreg,<sym> (BFD_RELOC_LO16) |
| 11144 | <op> op[0],0($tempreg) |
| 11145 | |
| 11146 | For NewABI, we want |
| 11147 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT_PAGE) |
| 11148 | <op> op[0],<sym>($tempreg) (BFD_RELOC_MIPS_GOT_OFST) |
| 11149 | |
| 11150 | If there is a base register, we add it to $tempreg before |
| 11151 | the <op>. If there is a constant, we stick it in the |
| 11152 | <op> instruction. We don't handle constants larger than |
| 11153 | 16 bits, because we have no way to load the upper 16 bits |
| 11154 | (actually, we could handle them for the subset of cases |
| 11155 | in which we are not using $at). */ |
| 11156 | gas_assert (offset_expr.X_op == O_symbol); |
| 11157 | if (HAVE_NEWABI) |
| 11158 | { |
| 11159 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 11160 | BFD_RELOC_MIPS_GOT_PAGE, mips_gp_register); |
| 11161 | if (breg != 0) |
| 11162 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 11163 | tempreg, tempreg, breg); |
| 11164 | macro_build (&offset_expr, s, fmt, op[0], |
| 11165 | BFD_RELOC_MIPS_GOT_OFST, tempreg); |
| 11166 | break; |
| 11167 | } |
| 11168 | expr1.X_add_number = offset_expr.X_add_number; |
| 11169 | offset_expr.X_add_number = 0; |
| 11170 | if (expr1.X_add_number < -0x8000 |
| 11171 | || expr1.X_add_number >= 0x8000) |
| 11172 | as_bad (_("PIC code offset overflow (max 16 signed bits)")); |
| 11173 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 11174 | lw_reloc_type, mips_gp_register); |
| 11175 | load_delay_nop (); |
| 11176 | relax_start (offset_expr.X_add_symbol); |
| 11177 | relax_switch (); |
| 11178 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", tempreg, |
| 11179 | tempreg, BFD_RELOC_LO16); |
| 11180 | relax_end (); |
| 11181 | if (breg != 0) |
| 11182 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 11183 | tempreg, tempreg, breg); |
| 11184 | macro_build (&expr1, s, fmt, op[0], BFD_RELOC_LO16, tempreg); |
| 11185 | } |
| 11186 | else if (mips_big_got && !HAVE_NEWABI) |
| 11187 | { |
| 11188 | int gpdelay; |
| 11189 | |
| 11190 | /* If this is a reference to an external symbol, we want |
| 11191 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 11192 | addu $tempreg,$tempreg,$gp |
| 11193 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) |
| 11194 | <op> op[0],0($tempreg) |
| 11195 | Otherwise we want |
| 11196 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 11197 | nop |
| 11198 | addiu $tempreg,$tempreg,<sym> (BFD_RELOC_LO16) |
| 11199 | <op> op[0],0($tempreg) |
| 11200 | If there is a base register, we add it to $tempreg before |
| 11201 | the <op>. If there is a constant, we stick it in the |
| 11202 | <op> instruction. We don't handle constants larger than |
| 11203 | 16 bits, because we have no way to load the upper 16 bits |
| 11204 | (actually, we could handle them for the subset of cases |
| 11205 | in which we are not using $at). */ |
| 11206 | gas_assert (offset_expr.X_op == O_symbol); |
| 11207 | expr1.X_add_number = offset_expr.X_add_number; |
| 11208 | offset_expr.X_add_number = 0; |
| 11209 | if (expr1.X_add_number < -0x8000 |
| 11210 | || expr1.X_add_number >= 0x8000) |
| 11211 | as_bad (_("PIC code offset overflow (max 16 signed bits)")); |
| 11212 | gpdelay = reg_needs_delay (mips_gp_register); |
| 11213 | relax_start (offset_expr.X_add_symbol); |
| 11214 | macro_build (&offset_expr, "lui", LUI_FMT, tempreg, |
| 11215 | BFD_RELOC_MIPS_GOT_HI16); |
| 11216 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", tempreg, tempreg, |
| 11217 | mips_gp_register); |
| 11218 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 11219 | BFD_RELOC_MIPS_GOT_LO16, tempreg); |
| 11220 | relax_switch (); |
| 11221 | if (gpdelay) |
| 11222 | macro_build (NULL, "nop", ""); |
| 11223 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 11224 | BFD_RELOC_MIPS_GOT16, mips_gp_register); |
| 11225 | load_delay_nop (); |
| 11226 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", tempreg, |
| 11227 | tempreg, BFD_RELOC_LO16); |
| 11228 | relax_end (); |
| 11229 | |
| 11230 | if (breg != 0) |
| 11231 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 11232 | tempreg, tempreg, breg); |
| 11233 | macro_build (&expr1, s, fmt, op[0], BFD_RELOC_LO16, tempreg); |
| 11234 | } |
| 11235 | else if (mips_big_got && HAVE_NEWABI) |
| 11236 | { |
| 11237 | /* If this is a reference to an external symbol, we want |
| 11238 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 11239 | add $tempreg,$tempreg,$gp |
| 11240 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) |
| 11241 | <op> op[0],<ofst>($tempreg) |
| 11242 | Otherwise, for local symbols, we want: |
| 11243 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT_PAGE) |
| 11244 | <op> op[0],<sym>($tempreg) (BFD_RELOC_MIPS_GOT_OFST) */ |
| 11245 | gas_assert (offset_expr.X_op == O_symbol); |
| 11246 | expr1.X_add_number = offset_expr.X_add_number; |
| 11247 | offset_expr.X_add_number = 0; |
| 11248 | if (expr1.X_add_number < -0x8000 |
| 11249 | || expr1.X_add_number >= 0x8000) |
| 11250 | as_bad (_("PIC code offset overflow (max 16 signed bits)")); |
| 11251 | relax_start (offset_expr.X_add_symbol); |
| 11252 | macro_build (&offset_expr, "lui", LUI_FMT, tempreg, |
| 11253 | BFD_RELOC_MIPS_GOT_HI16); |
| 11254 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", tempreg, tempreg, |
| 11255 | mips_gp_register); |
| 11256 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 11257 | BFD_RELOC_MIPS_GOT_LO16, tempreg); |
| 11258 | if (breg != 0) |
| 11259 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 11260 | tempreg, tempreg, breg); |
| 11261 | macro_build (&expr1, s, fmt, op[0], BFD_RELOC_LO16, tempreg); |
| 11262 | |
| 11263 | relax_switch (); |
| 11264 | offset_expr.X_add_number = expr1.X_add_number; |
| 11265 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 11266 | BFD_RELOC_MIPS_GOT_PAGE, mips_gp_register); |
| 11267 | if (breg != 0) |
| 11268 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 11269 | tempreg, tempreg, breg); |
| 11270 | macro_build (&offset_expr, s, fmt, op[0], |
| 11271 | BFD_RELOC_MIPS_GOT_OFST, tempreg); |
| 11272 | relax_end (); |
| 11273 | } |
| 11274 | else |
| 11275 | abort (); |
| 11276 | |
| 11277 | break; |
| 11278 | |
| 11279 | case M_JRADDIUSP: |
| 11280 | gas_assert (mips_opts.micromips); |
| 11281 | gas_assert (mips_opts.insn32); |
| 11282 | start_noreorder (); |
| 11283 | macro_build (NULL, "jr", "s", RA); |
| 11284 | expr1.X_add_number = op[0] << 2; |
| 11285 | macro_build (&expr1, "addiu", "t,r,j", SP, SP, BFD_RELOC_LO16); |
| 11286 | end_noreorder (); |
| 11287 | break; |
| 11288 | |
| 11289 | case M_JRC: |
| 11290 | gas_assert (mips_opts.micromips); |
| 11291 | gas_assert (mips_opts.insn32); |
| 11292 | macro_build (NULL, "jr", "s", op[0]); |
| 11293 | if (mips_opts.noreorder) |
| 11294 | macro_build (NULL, "nop", ""); |
| 11295 | break; |
| 11296 | |
| 11297 | case M_LI: |
| 11298 | case M_LI_S: |
| 11299 | load_register (op[0], &imm_expr, 0); |
| 11300 | break; |
| 11301 | |
| 11302 | case M_DLI: |
| 11303 | load_register (op[0], &imm_expr, 1); |
| 11304 | break; |
| 11305 | |
| 11306 | case M_LI_SS: |
| 11307 | if (imm_expr.X_op == O_constant) |
| 11308 | { |
| 11309 | used_at = 1; |
| 11310 | load_register (AT, &imm_expr, 0); |
| 11311 | macro_build (NULL, "mtc1", "t,G", AT, op[0]); |
| 11312 | break; |
| 11313 | } |
| 11314 | else |
| 11315 | { |
| 11316 | gas_assert (imm_expr.X_op == O_absent |
| 11317 | && offset_expr.X_op == O_symbol |
| 11318 | && strcmp (segment_name (S_GET_SEGMENT |
| 11319 | (offset_expr.X_add_symbol)), |
| 11320 | ".lit4") == 0 |
| 11321 | && offset_expr.X_add_number == 0); |
| 11322 | macro_build (&offset_expr, "lwc1", "T,o(b)", op[0], |
| 11323 | BFD_RELOC_MIPS_LITERAL, mips_gp_register); |
| 11324 | break; |
| 11325 | } |
| 11326 | |
| 11327 | case M_LI_D: |
| 11328 | /* Check if we have a constant in IMM_EXPR. If the GPRs are 64 bits |
| 11329 | wide, IMM_EXPR is the entire value. Otherwise IMM_EXPR is the high |
| 11330 | order 32 bits of the value and the low order 32 bits are either |
| 11331 | zero or in OFFSET_EXPR. */ |
| 11332 | if (imm_expr.X_op == O_constant) |
| 11333 | { |
| 11334 | if (HAVE_64BIT_GPRS) |
| 11335 | load_register (op[0], &imm_expr, 1); |
| 11336 | else |
| 11337 | { |
| 11338 | int hreg, lreg; |
| 11339 | |
| 11340 | if (target_big_endian) |
| 11341 | { |
| 11342 | hreg = op[0]; |
| 11343 | lreg = op[0] + 1; |
| 11344 | } |
| 11345 | else |
| 11346 | { |
| 11347 | hreg = op[0] + 1; |
| 11348 | lreg = op[0]; |
| 11349 | } |
| 11350 | |
| 11351 | if (hreg <= 31) |
| 11352 | load_register (hreg, &imm_expr, 0); |
| 11353 | if (lreg <= 31) |
| 11354 | { |
| 11355 | if (offset_expr.X_op == O_absent) |
| 11356 | move_register (lreg, 0); |
| 11357 | else |
| 11358 | { |
| 11359 | gas_assert (offset_expr.X_op == O_constant); |
| 11360 | load_register (lreg, &offset_expr, 0); |
| 11361 | } |
| 11362 | } |
| 11363 | } |
| 11364 | break; |
| 11365 | } |
| 11366 | gas_assert (imm_expr.X_op == O_absent); |
| 11367 | |
| 11368 | /* We know that sym is in the .rdata section. First we get the |
| 11369 | upper 16 bits of the address. */ |
| 11370 | if (mips_pic == NO_PIC) |
| 11371 | { |
| 11372 | macro_build_lui (&offset_expr, AT); |
| 11373 | used_at = 1; |
| 11374 | } |
| 11375 | else |
| 11376 | { |
| 11377 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", AT, |
| 11378 | BFD_RELOC_MIPS_GOT16, mips_gp_register); |
| 11379 | used_at = 1; |
| 11380 | } |
| 11381 | |
| 11382 | /* Now we load the register(s). */ |
| 11383 | if (HAVE_64BIT_GPRS) |
| 11384 | { |
| 11385 | used_at = 1; |
| 11386 | macro_build (&offset_expr, "ld", "t,o(b)", op[0], |
| 11387 | BFD_RELOC_LO16, AT); |
| 11388 | } |
| 11389 | else |
| 11390 | { |
| 11391 | used_at = 1; |
| 11392 | macro_build (&offset_expr, "lw", "t,o(b)", op[0], |
| 11393 | BFD_RELOC_LO16, AT); |
| 11394 | if (op[0] != RA) |
| 11395 | { |
| 11396 | /* FIXME: How in the world do we deal with the possible |
| 11397 | overflow here? */ |
| 11398 | offset_expr.X_add_number += 4; |
| 11399 | macro_build (&offset_expr, "lw", "t,o(b)", |
| 11400 | op[0] + 1, BFD_RELOC_LO16, AT); |
| 11401 | } |
| 11402 | } |
| 11403 | break; |
| 11404 | |
| 11405 | case M_LI_DD: |
| 11406 | /* Check if we have a constant in IMM_EXPR. If the FPRs are 64 bits |
| 11407 | wide, IMM_EXPR is the entire value and the GPRs are known to be 64 |
| 11408 | bits wide as well. Otherwise IMM_EXPR is the high order 32 bits of |
| 11409 | the value and the low order 32 bits are either zero or in |
| 11410 | OFFSET_EXPR. */ |
| 11411 | if (imm_expr.X_op == O_constant) |
| 11412 | { |
| 11413 | used_at = 1; |
| 11414 | load_register (AT, &imm_expr, HAVE_64BIT_FPRS); |
| 11415 | if (HAVE_64BIT_FPRS) |
| 11416 | { |
| 11417 | gas_assert (HAVE_64BIT_GPRS); |
| 11418 | macro_build (NULL, "dmtc1", "t,S", AT, op[0]); |
| 11419 | } |
| 11420 | else |
| 11421 | { |
| 11422 | macro_build (NULL, "mtc1", "t,G", AT, op[0] + 1); |
| 11423 | if (offset_expr.X_op == O_absent) |
| 11424 | macro_build (NULL, "mtc1", "t,G", 0, op[0]); |
| 11425 | else |
| 11426 | { |
| 11427 | gas_assert (offset_expr.X_op == O_constant); |
| 11428 | load_register (AT, &offset_expr, 0); |
| 11429 | macro_build (NULL, "mtc1", "t,G", AT, op[0]); |
| 11430 | } |
| 11431 | } |
| 11432 | break; |
| 11433 | } |
| 11434 | |
| 11435 | gas_assert (imm_expr.X_op == O_absent |
| 11436 | && offset_expr.X_op == O_symbol |
| 11437 | && offset_expr.X_add_number == 0); |
| 11438 | s = segment_name (S_GET_SEGMENT (offset_expr.X_add_symbol)); |
| 11439 | if (strcmp (s, ".lit8") == 0) |
| 11440 | { |
| 11441 | op[2] = mips_gp_register; |
| 11442 | offset_reloc[0] = BFD_RELOC_MIPS_LITERAL; |
| 11443 | offset_reloc[1] = BFD_RELOC_UNUSED; |
| 11444 | offset_reloc[2] = BFD_RELOC_UNUSED; |
| 11445 | } |
| 11446 | else |
| 11447 | { |
| 11448 | gas_assert (strcmp (s, RDATA_SECTION_NAME) == 0); |
| 11449 | used_at = 1; |
| 11450 | if (mips_pic != NO_PIC) |
| 11451 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", AT, |
| 11452 | BFD_RELOC_MIPS_GOT16, mips_gp_register); |
| 11453 | else |
| 11454 | { |
| 11455 | /* FIXME: This won't work for a 64 bit address. */ |
| 11456 | macro_build_lui (&offset_expr, AT); |
| 11457 | } |
| 11458 | |
| 11459 | op[2] = AT; |
| 11460 | offset_reloc[0] = BFD_RELOC_LO16; |
| 11461 | offset_reloc[1] = BFD_RELOC_UNUSED; |
| 11462 | offset_reloc[2] = BFD_RELOC_UNUSED; |
| 11463 | } |
| 11464 | align = 8; |
| 11465 | /* Fall through */ |
| 11466 | |
| 11467 | case M_L_DAB: |
| 11468 | /* |
| 11469 | * The MIPS assembler seems to check for X_add_number not |
| 11470 | * being double aligned and generating: |
| 11471 | * lui at,%hi(foo+1) |
| 11472 | * addu at,at,v1 |
| 11473 | * addiu at,at,%lo(foo+1) |
| 11474 | * lwc1 f2,0(at) |
| 11475 | * lwc1 f3,4(at) |
| 11476 | * But, the resulting address is the same after relocation so why |
| 11477 | * generate the extra instruction? |
| 11478 | */ |
| 11479 | /* Itbl support may require additional care here. */ |
| 11480 | coproc = 1; |
| 11481 | fmt = "T,o(b)"; |
| 11482 | if (CPU_HAS_LDC1_SDC1 (mips_opts.arch)) |
| 11483 | { |
| 11484 | s = "ldc1"; |
| 11485 | goto ld_st; |
| 11486 | } |
| 11487 | s = "lwc1"; |
| 11488 | goto ldd_std; |
| 11489 | |
| 11490 | case M_S_DAB: |
| 11491 | gas_assert (!mips_opts.micromips); |
| 11492 | /* Itbl support may require additional care here. */ |
| 11493 | coproc = 1; |
| 11494 | fmt = "T,o(b)"; |
| 11495 | if (CPU_HAS_LDC1_SDC1 (mips_opts.arch)) |
| 11496 | { |
| 11497 | s = "sdc1"; |
| 11498 | goto ld_st; |
| 11499 | } |
| 11500 | s = "swc1"; |
| 11501 | goto ldd_std; |
| 11502 | |
| 11503 | case M_LQ_AB: |
| 11504 | fmt = "t,o(b)"; |
| 11505 | s = "lq"; |
| 11506 | goto ld; |
| 11507 | |
| 11508 | case M_SQ_AB: |
| 11509 | fmt = "t,o(b)"; |
| 11510 | s = "sq"; |
| 11511 | goto ld_st; |
| 11512 | |
| 11513 | case M_LD_AB: |
| 11514 | fmt = "t,o(b)"; |
| 11515 | if (HAVE_64BIT_GPRS) |
| 11516 | { |
| 11517 | s = "ld"; |
| 11518 | goto ld; |
| 11519 | } |
| 11520 | s = "lw"; |
| 11521 | goto ldd_std; |
| 11522 | |
| 11523 | case M_SD_AB: |
| 11524 | fmt = "t,o(b)"; |
| 11525 | if (HAVE_64BIT_GPRS) |
| 11526 | { |
| 11527 | s = "sd"; |
| 11528 | goto ld_st; |
| 11529 | } |
| 11530 | s = "sw"; |
| 11531 | |
| 11532 | ldd_std: |
| 11533 | /* Even on a big endian machine $fn comes before $fn+1. We have |
| 11534 | to adjust when loading from memory. We set coproc if we must |
| 11535 | load $fn+1 first. */ |
| 11536 | /* Itbl support may require additional care here. */ |
| 11537 | if (!target_big_endian) |
| 11538 | coproc = 0; |
| 11539 | |
| 11540 | breg = op[2]; |
| 11541 | if (small_offset_p (0, align, 16)) |
| 11542 | { |
| 11543 | ep = &offset_expr; |
| 11544 | if (!small_offset_p (4, align, 16)) |
| 11545 | { |
| 11546 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", AT, breg, |
| 11547 | -1, offset_reloc[0], offset_reloc[1], |
| 11548 | offset_reloc[2]); |
| 11549 | expr1.X_add_number = 0; |
| 11550 | ep = &expr1; |
| 11551 | breg = AT; |
| 11552 | used_at = 1; |
| 11553 | offset_reloc[0] = BFD_RELOC_LO16; |
| 11554 | offset_reloc[1] = BFD_RELOC_UNUSED; |
| 11555 | offset_reloc[2] = BFD_RELOC_UNUSED; |
| 11556 | } |
| 11557 | if (strcmp (s, "lw") == 0 && op[0] == breg) |
| 11558 | { |
| 11559 | ep->X_add_number += 4; |
| 11560 | macro_build (ep, s, fmt, op[0] + 1, -1, offset_reloc[0], |
| 11561 | offset_reloc[1], offset_reloc[2], breg); |
| 11562 | ep->X_add_number -= 4; |
| 11563 | macro_build (ep, s, fmt, op[0], -1, offset_reloc[0], |
| 11564 | offset_reloc[1], offset_reloc[2], breg); |
| 11565 | } |
| 11566 | else |
| 11567 | { |
| 11568 | macro_build (ep, s, fmt, coproc ? op[0] + 1 : op[0], -1, |
| 11569 | offset_reloc[0], offset_reloc[1], offset_reloc[2], |
| 11570 | breg); |
| 11571 | ep->X_add_number += 4; |
| 11572 | macro_build (ep, s, fmt, coproc ? op[0] : op[0] + 1, -1, |
| 11573 | offset_reloc[0], offset_reloc[1], offset_reloc[2], |
| 11574 | breg); |
| 11575 | } |
| 11576 | break; |
| 11577 | } |
| 11578 | |
| 11579 | if (offset_expr.X_op != O_symbol |
| 11580 | && offset_expr.X_op != O_constant) |
| 11581 | { |
| 11582 | as_bad (_("expression too complex")); |
| 11583 | offset_expr.X_op = O_constant; |
| 11584 | } |
| 11585 | |
| 11586 | if (HAVE_32BIT_ADDRESSES |
| 11587 | && !IS_SEXT_32BIT_NUM (offset_expr.X_add_number)) |
| 11588 | { |
| 11589 | char value [32]; |
| 11590 | |
| 11591 | sprintf_vma (value, offset_expr.X_add_number); |
| 11592 | as_bad (_("number (0x%s) larger than 32 bits"), value); |
| 11593 | } |
| 11594 | |
| 11595 | if (mips_pic == NO_PIC || offset_expr.X_op == O_constant) |
| 11596 | { |
| 11597 | /* If this is a reference to a GP relative symbol, we want |
| 11598 | <op> op[0],<sym>($gp) (BFD_RELOC_GPREL16) |
| 11599 | <op> op[0]+1,<sym>+4($gp) (BFD_RELOC_GPREL16) |
| 11600 | If we have a base register, we use this |
| 11601 | addu $at,$breg,$gp |
| 11602 | <op> op[0],<sym>($at) (BFD_RELOC_GPREL16) |
| 11603 | <op> op[0]+1,<sym>+4($at) (BFD_RELOC_GPREL16) |
| 11604 | If this is not a GP relative symbol, we want |
| 11605 | lui $at,<sym> (BFD_RELOC_HI16_S) |
| 11606 | <op> op[0],<sym>($at) (BFD_RELOC_LO16) |
| 11607 | <op> op[0]+1,<sym>+4($at) (BFD_RELOC_LO16) |
| 11608 | If there is a base register, we add it to $at after the |
| 11609 | lui instruction. If there is a constant, we always use |
| 11610 | the last case. */ |
| 11611 | if (offset_expr.X_op == O_symbol |
| 11612 | && (valueT) offset_expr.X_add_number <= MAX_GPREL_OFFSET |
| 11613 | && !nopic_need_relax (offset_expr.X_add_symbol, 1)) |
| 11614 | { |
| 11615 | relax_start (offset_expr.X_add_symbol); |
| 11616 | if (breg == 0) |
| 11617 | { |
| 11618 | tempreg = mips_gp_register; |
| 11619 | } |
| 11620 | else |
| 11621 | { |
| 11622 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 11623 | AT, breg, mips_gp_register); |
| 11624 | tempreg = AT; |
| 11625 | used_at = 1; |
| 11626 | } |
| 11627 | |
| 11628 | /* Itbl support may require additional care here. */ |
| 11629 | macro_build (&offset_expr, s, fmt, coproc ? op[0] + 1 : op[0], |
| 11630 | BFD_RELOC_GPREL16, tempreg); |
| 11631 | offset_expr.X_add_number += 4; |
| 11632 | |
| 11633 | /* Set mips_optimize to 2 to avoid inserting an |
| 11634 | undesired nop. */ |
| 11635 | hold_mips_optimize = mips_optimize; |
| 11636 | mips_optimize = 2; |
| 11637 | /* Itbl support may require additional care here. */ |
| 11638 | macro_build (&offset_expr, s, fmt, coproc ? op[0] : op[0] + 1, |
| 11639 | BFD_RELOC_GPREL16, tempreg); |
| 11640 | mips_optimize = hold_mips_optimize; |
| 11641 | |
| 11642 | relax_switch (); |
| 11643 | |
| 11644 | offset_expr.X_add_number -= 4; |
| 11645 | } |
| 11646 | used_at = 1; |
| 11647 | if (offset_high_part (offset_expr.X_add_number, 16) |
| 11648 | != offset_high_part (offset_expr.X_add_number + 4, 16)) |
| 11649 | { |
| 11650 | load_address (AT, &offset_expr, &used_at); |
| 11651 | offset_expr.X_op = O_constant; |
| 11652 | offset_expr.X_add_number = 0; |
| 11653 | } |
| 11654 | else |
| 11655 | macro_build_lui (&offset_expr, AT); |
| 11656 | if (breg != 0) |
| 11657 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", AT, breg, AT); |
| 11658 | /* Itbl support may require additional care here. */ |
| 11659 | macro_build (&offset_expr, s, fmt, coproc ? op[0] + 1 : op[0], |
| 11660 | BFD_RELOC_LO16, AT); |
| 11661 | /* FIXME: How do we handle overflow here? */ |
| 11662 | offset_expr.X_add_number += 4; |
| 11663 | /* Itbl support may require additional care here. */ |
| 11664 | macro_build (&offset_expr, s, fmt, coproc ? op[0] : op[0] + 1, |
| 11665 | BFD_RELOC_LO16, AT); |
| 11666 | if (mips_relax.sequence) |
| 11667 | relax_end (); |
| 11668 | } |
| 11669 | else if (!mips_big_got) |
| 11670 | { |
| 11671 | /* If this is a reference to an external symbol, we want |
| 11672 | lw $at,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 11673 | nop |
| 11674 | <op> op[0],0($at) |
| 11675 | <op> op[0]+1,4($at) |
| 11676 | Otherwise we want |
| 11677 | lw $at,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 11678 | nop |
| 11679 | <op> op[0],<sym>($at) (BFD_RELOC_LO16) |
| 11680 | <op> op[0]+1,<sym>+4($at) (BFD_RELOC_LO16) |
| 11681 | If there is a base register we add it to $at before the |
| 11682 | lwc1 instructions. If there is a constant we include it |
| 11683 | in the lwc1 instructions. */ |
| 11684 | used_at = 1; |
| 11685 | expr1.X_add_number = offset_expr.X_add_number; |
| 11686 | if (expr1.X_add_number < -0x8000 |
| 11687 | || expr1.X_add_number >= 0x8000 - 4) |
| 11688 | as_bad (_("PIC code offset overflow (max 16 signed bits)")); |
| 11689 | load_got_offset (AT, &offset_expr); |
| 11690 | load_delay_nop (); |
| 11691 | if (breg != 0) |
| 11692 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", AT, breg, AT); |
| 11693 | |
| 11694 | /* Set mips_optimize to 2 to avoid inserting an undesired |
| 11695 | nop. */ |
| 11696 | hold_mips_optimize = mips_optimize; |
| 11697 | mips_optimize = 2; |
| 11698 | |
| 11699 | /* Itbl support may require additional care here. */ |
| 11700 | relax_start (offset_expr.X_add_symbol); |
| 11701 | macro_build (&expr1, s, fmt, coproc ? op[0] + 1 : op[0], |
| 11702 | BFD_RELOC_LO16, AT); |
| 11703 | expr1.X_add_number += 4; |
| 11704 | macro_build (&expr1, s, fmt, coproc ? op[0] : op[0] + 1, |
| 11705 | BFD_RELOC_LO16, AT); |
| 11706 | relax_switch (); |
| 11707 | macro_build (&offset_expr, s, fmt, coproc ? op[0] + 1 : op[0], |
| 11708 | BFD_RELOC_LO16, AT); |
| 11709 | offset_expr.X_add_number += 4; |
| 11710 | macro_build (&offset_expr, s, fmt, coproc ? op[0] : op[0] + 1, |
| 11711 | BFD_RELOC_LO16, AT); |
| 11712 | relax_end (); |
| 11713 | |
| 11714 | mips_optimize = hold_mips_optimize; |
| 11715 | } |
| 11716 | else if (mips_big_got) |
| 11717 | { |
| 11718 | int gpdelay; |
| 11719 | |
| 11720 | /* If this is a reference to an external symbol, we want |
| 11721 | lui $at,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 11722 | addu $at,$at,$gp |
| 11723 | lw $at,<sym>($at) (BFD_RELOC_MIPS_GOT_LO16) |
| 11724 | nop |
| 11725 | <op> op[0],0($at) |
| 11726 | <op> op[0]+1,4($at) |
| 11727 | Otherwise we want |
| 11728 | lw $at,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 11729 | nop |
| 11730 | <op> op[0],<sym>($at) (BFD_RELOC_LO16) |
| 11731 | <op> op[0]+1,<sym>+4($at) (BFD_RELOC_LO16) |
| 11732 | If there is a base register we add it to $at before the |
| 11733 | lwc1 instructions. If there is a constant we include it |
| 11734 | in the lwc1 instructions. */ |
| 11735 | used_at = 1; |
| 11736 | expr1.X_add_number = offset_expr.X_add_number; |
| 11737 | offset_expr.X_add_number = 0; |
| 11738 | if (expr1.X_add_number < -0x8000 |
| 11739 | || expr1.X_add_number >= 0x8000 - 4) |
| 11740 | as_bad (_("PIC code offset overflow (max 16 signed bits)")); |
| 11741 | gpdelay = reg_needs_delay (mips_gp_register); |
| 11742 | relax_start (offset_expr.X_add_symbol); |
| 11743 | macro_build (&offset_expr, "lui", LUI_FMT, |
| 11744 | AT, BFD_RELOC_MIPS_GOT_HI16); |
| 11745 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 11746 | AT, AT, mips_gp_register); |
| 11747 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 11748 | AT, BFD_RELOC_MIPS_GOT_LO16, AT); |
| 11749 | load_delay_nop (); |
| 11750 | if (breg != 0) |
| 11751 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", AT, breg, AT); |
| 11752 | /* Itbl support may require additional care here. */ |
| 11753 | macro_build (&expr1, s, fmt, coproc ? op[0] + 1 : op[0], |
| 11754 | BFD_RELOC_LO16, AT); |
| 11755 | expr1.X_add_number += 4; |
| 11756 | |
| 11757 | /* Set mips_optimize to 2 to avoid inserting an undesired |
| 11758 | nop. */ |
| 11759 | hold_mips_optimize = mips_optimize; |
| 11760 | mips_optimize = 2; |
| 11761 | /* Itbl support may require additional care here. */ |
| 11762 | macro_build (&expr1, s, fmt, coproc ? op[0] : op[0] + 1, |
| 11763 | BFD_RELOC_LO16, AT); |
| 11764 | mips_optimize = hold_mips_optimize; |
| 11765 | expr1.X_add_number -= 4; |
| 11766 | |
| 11767 | relax_switch (); |
| 11768 | offset_expr.X_add_number = expr1.X_add_number; |
| 11769 | if (gpdelay) |
| 11770 | macro_build (NULL, "nop", ""); |
| 11771 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", AT, |
| 11772 | BFD_RELOC_MIPS_GOT16, mips_gp_register); |
| 11773 | load_delay_nop (); |
| 11774 | if (breg != 0) |
| 11775 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", AT, breg, AT); |
| 11776 | /* Itbl support may require additional care here. */ |
| 11777 | macro_build (&offset_expr, s, fmt, coproc ? op[0] + 1 : op[0], |
| 11778 | BFD_RELOC_LO16, AT); |
| 11779 | offset_expr.X_add_number += 4; |
| 11780 | |
| 11781 | /* Set mips_optimize to 2 to avoid inserting an undesired |
| 11782 | nop. */ |
| 11783 | hold_mips_optimize = mips_optimize; |
| 11784 | mips_optimize = 2; |
| 11785 | /* Itbl support may require additional care here. */ |
| 11786 | macro_build (&offset_expr, s, fmt, coproc ? op[0] : op[0] + 1, |
| 11787 | BFD_RELOC_LO16, AT); |
| 11788 | mips_optimize = hold_mips_optimize; |
| 11789 | relax_end (); |
| 11790 | } |
| 11791 | else |
| 11792 | abort (); |
| 11793 | |
| 11794 | break; |
| 11795 | |
| 11796 | case M_SAA_AB: |
| 11797 | s = "saa"; |
| 11798 | offbits = 0; |
| 11799 | fmt = "t,(b)"; |
| 11800 | goto ld_st; |
| 11801 | case M_SAAD_AB: |
| 11802 | s = "saad"; |
| 11803 | offbits = 0; |
| 11804 | fmt = "t,(b)"; |
| 11805 | goto ld_st; |
| 11806 | |
| 11807 | /* New code added to support COPZ instructions. |
| 11808 | This code builds table entries out of the macros in mip_opcodes. |
| 11809 | R4000 uses interlocks to handle coproc delays. |
| 11810 | Other chips (like the R3000) require nops to be inserted for delays. |
| 11811 | |
| 11812 | FIXME: Currently, we require that the user handle delays. |
| 11813 | In order to fill delay slots for non-interlocked chips, |
| 11814 | we must have a way to specify delays based on the coprocessor. |
| 11815 | Eg. 4 cycles if load coproc reg from memory, 1 if in cache, etc. |
| 11816 | What are the side-effects of the cop instruction? |
| 11817 | What cache support might we have and what are its effects? |
| 11818 | Both coprocessor & memory require delays. how long??? |
| 11819 | What registers are read/set/modified? |
| 11820 | |
| 11821 | If an itbl is provided to interpret cop instructions, |
| 11822 | this knowledge can be encoded in the itbl spec. */ |
| 11823 | |
| 11824 | case M_COP0: |
| 11825 | s = "c0"; |
| 11826 | goto copz; |
| 11827 | case M_COP1: |
| 11828 | s = "c1"; |
| 11829 | goto copz; |
| 11830 | case M_COP2: |
| 11831 | s = "c2"; |
| 11832 | goto copz; |
| 11833 | case M_COP3: |
| 11834 | s = "c3"; |
| 11835 | copz: |
| 11836 | gas_assert (!mips_opts.micromips); |
| 11837 | /* For now we just do C (same as Cz). The parameter will be |
| 11838 | stored in insn_opcode by mips_ip. */ |
| 11839 | macro_build (NULL, s, "C", (int) ip->insn_opcode); |
| 11840 | break; |
| 11841 | |
| 11842 | case M_MOVE: |
| 11843 | move_register (op[0], op[1]); |
| 11844 | break; |
| 11845 | |
| 11846 | case M_MOVEP: |
| 11847 | gas_assert (mips_opts.micromips); |
| 11848 | gas_assert (mips_opts.insn32); |
| 11849 | move_register (micromips_to_32_reg_h_map1[op[0]], |
| 11850 | micromips_to_32_reg_m_map[op[1]]); |
| 11851 | move_register (micromips_to_32_reg_h_map2[op[0]], |
| 11852 | micromips_to_32_reg_n_map[op[2]]); |
| 11853 | break; |
| 11854 | |
| 11855 | case M_DMUL: |
| 11856 | dbl = 1; |
| 11857 | case M_MUL: |
| 11858 | if (mips_opts.arch == CPU_R5900) |
| 11859 | macro_build (NULL, dbl ? "dmultu" : "multu", "d,s,t", op[0], op[1], |
| 11860 | op[2]); |
| 11861 | else |
| 11862 | { |
| 11863 | macro_build (NULL, dbl ? "dmultu" : "multu", "s,t", op[1], op[2]); |
| 11864 | macro_build (NULL, "mflo", MFHL_FMT, op[0]); |
| 11865 | } |
| 11866 | break; |
| 11867 | |
| 11868 | case M_DMUL_I: |
| 11869 | dbl = 1; |
| 11870 | case M_MUL_I: |
| 11871 | /* The MIPS assembler some times generates shifts and adds. I'm |
| 11872 | not trying to be that fancy. GCC should do this for us |
| 11873 | anyway. */ |
| 11874 | used_at = 1; |
| 11875 | load_register (AT, &imm_expr, dbl); |
| 11876 | macro_build (NULL, dbl ? "dmult" : "mult", "s,t", op[1], AT); |
| 11877 | macro_build (NULL, "mflo", MFHL_FMT, op[0]); |
| 11878 | break; |
| 11879 | |
| 11880 | case M_DMULO_I: |
| 11881 | dbl = 1; |
| 11882 | case M_MULO_I: |
| 11883 | imm = 1; |
| 11884 | goto do_mulo; |
| 11885 | |
| 11886 | case M_DMULO: |
| 11887 | dbl = 1; |
| 11888 | case M_MULO: |
| 11889 | do_mulo: |
| 11890 | start_noreorder (); |
| 11891 | used_at = 1; |
| 11892 | if (imm) |
| 11893 | load_register (AT, &imm_expr, dbl); |
| 11894 | macro_build (NULL, dbl ? "dmult" : "mult", "s,t", |
| 11895 | op[1], imm ? AT : op[2]); |
| 11896 | macro_build (NULL, "mflo", MFHL_FMT, op[0]); |
| 11897 | macro_build (NULL, dbl ? "dsra32" : "sra", SHFT_FMT, op[0], op[0], 31); |
| 11898 | macro_build (NULL, "mfhi", MFHL_FMT, AT); |
| 11899 | if (mips_trap) |
| 11900 | macro_build (NULL, "tne", TRAP_FMT, op[0], AT, 6); |
| 11901 | else |
| 11902 | { |
| 11903 | if (mips_opts.micromips) |
| 11904 | micromips_label_expr (&label_expr); |
| 11905 | else |
| 11906 | label_expr.X_add_number = 8; |
| 11907 | macro_build (&label_expr, "beq", "s,t,p", op[0], AT); |
| 11908 | macro_build (NULL, "nop", ""); |
| 11909 | macro_build (NULL, "break", BRK_FMT, 6); |
| 11910 | if (mips_opts.micromips) |
| 11911 | micromips_add_label (); |
| 11912 | } |
| 11913 | end_noreorder (); |
| 11914 | macro_build (NULL, "mflo", MFHL_FMT, op[0]); |
| 11915 | break; |
| 11916 | |
| 11917 | case M_DMULOU_I: |
| 11918 | dbl = 1; |
| 11919 | case M_MULOU_I: |
| 11920 | imm = 1; |
| 11921 | goto do_mulou; |
| 11922 | |
| 11923 | case M_DMULOU: |
| 11924 | dbl = 1; |
| 11925 | case M_MULOU: |
| 11926 | do_mulou: |
| 11927 | start_noreorder (); |
| 11928 | used_at = 1; |
| 11929 | if (imm) |
| 11930 | load_register (AT, &imm_expr, dbl); |
| 11931 | macro_build (NULL, dbl ? "dmultu" : "multu", "s,t", |
| 11932 | op[1], imm ? AT : op[2]); |
| 11933 | macro_build (NULL, "mfhi", MFHL_FMT, AT); |
| 11934 | macro_build (NULL, "mflo", MFHL_FMT, op[0]); |
| 11935 | if (mips_trap) |
| 11936 | macro_build (NULL, "tne", TRAP_FMT, AT, ZERO, 6); |
| 11937 | else |
| 11938 | { |
| 11939 | if (mips_opts.micromips) |
| 11940 | micromips_label_expr (&label_expr); |
| 11941 | else |
| 11942 | label_expr.X_add_number = 8; |
| 11943 | macro_build (&label_expr, "beq", "s,t,p", AT, ZERO); |
| 11944 | macro_build (NULL, "nop", ""); |
| 11945 | macro_build (NULL, "break", BRK_FMT, 6); |
| 11946 | if (mips_opts.micromips) |
| 11947 | micromips_add_label (); |
| 11948 | } |
| 11949 | end_noreorder (); |
| 11950 | break; |
| 11951 | |
| 11952 | case M_DROL: |
| 11953 | if (ISA_HAS_DROR (mips_opts.isa) || CPU_HAS_DROR (mips_opts.arch)) |
| 11954 | { |
| 11955 | if (op[0] == op[1]) |
| 11956 | { |
| 11957 | tempreg = AT; |
| 11958 | used_at = 1; |
| 11959 | } |
| 11960 | else |
| 11961 | tempreg = op[0]; |
| 11962 | macro_build (NULL, "dnegu", "d,w", tempreg, op[2]); |
| 11963 | macro_build (NULL, "drorv", "d,t,s", op[0], op[1], tempreg); |
| 11964 | break; |
| 11965 | } |
| 11966 | used_at = 1; |
| 11967 | macro_build (NULL, "dsubu", "d,v,t", AT, ZERO, op[2]); |
| 11968 | macro_build (NULL, "dsrlv", "d,t,s", AT, op[1], AT); |
| 11969 | macro_build (NULL, "dsllv", "d,t,s", op[0], op[1], op[2]); |
| 11970 | macro_build (NULL, "or", "d,v,t", op[0], op[0], AT); |
| 11971 | break; |
| 11972 | |
| 11973 | case M_ROL: |
| 11974 | if (ISA_HAS_ROR (mips_opts.isa) || CPU_HAS_ROR (mips_opts.arch)) |
| 11975 | { |
| 11976 | if (op[0] == op[1]) |
| 11977 | { |
| 11978 | tempreg = AT; |
| 11979 | used_at = 1; |
| 11980 | } |
| 11981 | else |
| 11982 | tempreg = op[0]; |
| 11983 | macro_build (NULL, "negu", "d,w", tempreg, op[2]); |
| 11984 | macro_build (NULL, "rorv", "d,t,s", op[0], op[1], tempreg); |
| 11985 | break; |
| 11986 | } |
| 11987 | used_at = 1; |
| 11988 | macro_build (NULL, "subu", "d,v,t", AT, ZERO, op[2]); |
| 11989 | macro_build (NULL, "srlv", "d,t,s", AT, op[1], AT); |
| 11990 | macro_build (NULL, "sllv", "d,t,s", op[0], op[1], op[2]); |
| 11991 | macro_build (NULL, "or", "d,v,t", op[0], op[0], AT); |
| 11992 | break; |
| 11993 | |
| 11994 | case M_DROL_I: |
| 11995 | { |
| 11996 | unsigned int rot; |
| 11997 | char *l; |
| 11998 | char *rr; |
| 11999 | |
| 12000 | rot = imm_expr.X_add_number & 0x3f; |
| 12001 | if (ISA_HAS_DROR (mips_opts.isa) || CPU_HAS_DROR (mips_opts.arch)) |
| 12002 | { |
| 12003 | rot = (64 - rot) & 0x3f; |
| 12004 | if (rot >= 32) |
| 12005 | macro_build (NULL, "dror32", SHFT_FMT, op[0], op[1], rot - 32); |
| 12006 | else |
| 12007 | macro_build (NULL, "dror", SHFT_FMT, op[0], op[1], rot); |
| 12008 | break; |
| 12009 | } |
| 12010 | if (rot == 0) |
| 12011 | { |
| 12012 | macro_build (NULL, "dsrl", SHFT_FMT, op[0], op[1], 0); |
| 12013 | break; |
| 12014 | } |
| 12015 | l = (rot < 0x20) ? "dsll" : "dsll32"; |
| 12016 | rr = ((0x40 - rot) < 0x20) ? "dsrl" : "dsrl32"; |
| 12017 | rot &= 0x1f; |
| 12018 | used_at = 1; |
| 12019 | macro_build (NULL, l, SHFT_FMT, AT, op[1], rot); |
| 12020 | macro_build (NULL, rr, SHFT_FMT, op[0], op[1], (0x20 - rot) & 0x1f); |
| 12021 | macro_build (NULL, "or", "d,v,t", op[0], op[0], AT); |
| 12022 | } |
| 12023 | break; |
| 12024 | |
| 12025 | case M_ROL_I: |
| 12026 | { |
| 12027 | unsigned int rot; |
| 12028 | |
| 12029 | rot = imm_expr.X_add_number & 0x1f; |
| 12030 | if (ISA_HAS_ROR (mips_opts.isa) || CPU_HAS_ROR (mips_opts.arch)) |
| 12031 | { |
| 12032 | macro_build (NULL, "ror", SHFT_FMT, op[0], op[1], |
| 12033 | (32 - rot) & 0x1f); |
| 12034 | break; |
| 12035 | } |
| 12036 | if (rot == 0) |
| 12037 | { |
| 12038 | macro_build (NULL, "srl", SHFT_FMT, op[0], op[1], 0); |
| 12039 | break; |
| 12040 | } |
| 12041 | used_at = 1; |
| 12042 | macro_build (NULL, "sll", SHFT_FMT, AT, op[1], rot); |
| 12043 | macro_build (NULL, "srl", SHFT_FMT, op[0], op[1], (0x20 - rot) & 0x1f); |
| 12044 | macro_build (NULL, "or", "d,v,t", op[0], op[0], AT); |
| 12045 | } |
| 12046 | break; |
| 12047 | |
| 12048 | case M_DROR: |
| 12049 | if (ISA_HAS_DROR (mips_opts.isa) || CPU_HAS_DROR (mips_opts.arch)) |
| 12050 | { |
| 12051 | macro_build (NULL, "drorv", "d,t,s", op[0], op[1], op[2]); |
| 12052 | break; |
| 12053 | } |
| 12054 | used_at = 1; |
| 12055 | macro_build (NULL, "dsubu", "d,v,t", AT, ZERO, op[2]); |
| 12056 | macro_build (NULL, "dsllv", "d,t,s", AT, op[1], AT); |
| 12057 | macro_build (NULL, "dsrlv", "d,t,s", op[0], op[1], op[2]); |
| 12058 | macro_build (NULL, "or", "d,v,t", op[0], op[0], AT); |
| 12059 | break; |
| 12060 | |
| 12061 | case M_ROR: |
| 12062 | if (ISA_HAS_ROR (mips_opts.isa) || CPU_HAS_ROR (mips_opts.arch)) |
| 12063 | { |
| 12064 | macro_build (NULL, "rorv", "d,t,s", op[0], op[1], op[2]); |
| 12065 | break; |
| 12066 | } |
| 12067 | used_at = 1; |
| 12068 | macro_build (NULL, "subu", "d,v,t", AT, ZERO, op[2]); |
| 12069 | macro_build (NULL, "sllv", "d,t,s", AT, op[1], AT); |
| 12070 | macro_build (NULL, "srlv", "d,t,s", op[0], op[1], op[2]); |
| 12071 | macro_build (NULL, "or", "d,v,t", op[0], op[0], AT); |
| 12072 | break; |
| 12073 | |
| 12074 | case M_DROR_I: |
| 12075 | { |
| 12076 | unsigned int rot; |
| 12077 | char *l; |
| 12078 | char *rr; |
| 12079 | |
| 12080 | rot = imm_expr.X_add_number & 0x3f; |
| 12081 | if (ISA_HAS_DROR (mips_opts.isa) || CPU_HAS_DROR (mips_opts.arch)) |
| 12082 | { |
| 12083 | if (rot >= 32) |
| 12084 | macro_build (NULL, "dror32", SHFT_FMT, op[0], op[1], rot - 32); |
| 12085 | else |
| 12086 | macro_build (NULL, "dror", SHFT_FMT, op[0], op[1], rot); |
| 12087 | break; |
| 12088 | } |
| 12089 | if (rot == 0) |
| 12090 | { |
| 12091 | macro_build (NULL, "dsrl", SHFT_FMT, op[0], op[1], 0); |
| 12092 | break; |
| 12093 | } |
| 12094 | rr = (rot < 0x20) ? "dsrl" : "dsrl32"; |
| 12095 | l = ((0x40 - rot) < 0x20) ? "dsll" : "dsll32"; |
| 12096 | rot &= 0x1f; |
| 12097 | used_at = 1; |
| 12098 | macro_build (NULL, rr, SHFT_FMT, AT, op[1], rot); |
| 12099 | macro_build (NULL, l, SHFT_FMT, op[0], op[1], (0x20 - rot) & 0x1f); |
| 12100 | macro_build (NULL, "or", "d,v,t", op[0], op[0], AT); |
| 12101 | } |
| 12102 | break; |
| 12103 | |
| 12104 | case M_ROR_I: |
| 12105 | { |
| 12106 | unsigned int rot; |
| 12107 | |
| 12108 | rot = imm_expr.X_add_number & 0x1f; |
| 12109 | if (ISA_HAS_ROR (mips_opts.isa) || CPU_HAS_ROR (mips_opts.arch)) |
| 12110 | { |
| 12111 | macro_build (NULL, "ror", SHFT_FMT, op[0], op[1], rot); |
| 12112 | break; |
| 12113 | } |
| 12114 | if (rot == 0) |
| 12115 | { |
| 12116 | macro_build (NULL, "srl", SHFT_FMT, op[0], op[1], 0); |
| 12117 | break; |
| 12118 | } |
| 12119 | used_at = 1; |
| 12120 | macro_build (NULL, "srl", SHFT_FMT, AT, op[1], rot); |
| 12121 | macro_build (NULL, "sll", SHFT_FMT, op[0], op[1], (0x20 - rot) & 0x1f); |
| 12122 | macro_build (NULL, "or", "d,v,t", op[0], op[0], AT); |
| 12123 | } |
| 12124 | break; |
| 12125 | |
| 12126 | case M_SEQ: |
| 12127 | if (op[1] == 0) |
| 12128 | macro_build (&expr1, "sltiu", "t,r,j", op[0], op[2], BFD_RELOC_LO16); |
| 12129 | else if (op[2] == 0) |
| 12130 | macro_build (&expr1, "sltiu", "t,r,j", op[0], op[1], BFD_RELOC_LO16); |
| 12131 | else |
| 12132 | { |
| 12133 | macro_build (NULL, "xor", "d,v,t", op[0], op[1], op[2]); |
| 12134 | macro_build (&expr1, "sltiu", "t,r,j", op[0], op[0], BFD_RELOC_LO16); |
| 12135 | } |
| 12136 | break; |
| 12137 | |
| 12138 | case M_SEQ_I: |
| 12139 | if (imm_expr.X_add_number == 0) |
| 12140 | { |
| 12141 | macro_build (&expr1, "sltiu", "t,r,j", op[0], op[1], BFD_RELOC_LO16); |
| 12142 | break; |
| 12143 | } |
| 12144 | if (op[1] == 0) |
| 12145 | { |
| 12146 | as_warn (_("instruction %s: result is always false"), |
| 12147 | ip->insn_mo->name); |
| 12148 | move_register (op[0], 0); |
| 12149 | break; |
| 12150 | } |
| 12151 | if (CPU_HAS_SEQ (mips_opts.arch) |
| 12152 | && -512 <= imm_expr.X_add_number |
| 12153 | && imm_expr.X_add_number < 512) |
| 12154 | { |
| 12155 | macro_build (NULL, "seqi", "t,r,+Q", op[0], op[1], |
| 12156 | (int) imm_expr.X_add_number); |
| 12157 | break; |
| 12158 | } |
| 12159 | if (imm_expr.X_add_number >= 0 |
| 12160 | && imm_expr.X_add_number < 0x10000) |
| 12161 | macro_build (&imm_expr, "xori", "t,r,i", op[0], op[1], BFD_RELOC_LO16); |
| 12162 | else if (imm_expr.X_add_number > -0x8000 |
| 12163 | && imm_expr.X_add_number < 0) |
| 12164 | { |
| 12165 | imm_expr.X_add_number = -imm_expr.X_add_number; |
| 12166 | macro_build (&imm_expr, HAVE_32BIT_GPRS ? "addiu" : "daddiu", |
| 12167 | "t,r,j", op[0], op[1], BFD_RELOC_LO16); |
| 12168 | } |
| 12169 | else if (CPU_HAS_SEQ (mips_opts.arch)) |
| 12170 | { |
| 12171 | used_at = 1; |
| 12172 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 12173 | macro_build (NULL, "seq", "d,v,t", op[0], op[1], AT); |
| 12174 | break; |
| 12175 | } |
| 12176 | else |
| 12177 | { |
| 12178 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 12179 | macro_build (NULL, "xor", "d,v,t", op[0], op[1], AT); |
| 12180 | used_at = 1; |
| 12181 | } |
| 12182 | macro_build (&expr1, "sltiu", "t,r,j", op[0], op[0], BFD_RELOC_LO16); |
| 12183 | break; |
| 12184 | |
| 12185 | case M_SGE: /* X >= Y <==> not (X < Y) */ |
| 12186 | s = "slt"; |
| 12187 | goto sge; |
| 12188 | case M_SGEU: |
| 12189 | s = "sltu"; |
| 12190 | sge: |
| 12191 | macro_build (NULL, s, "d,v,t", op[0], op[1], op[2]); |
| 12192 | macro_build (&expr1, "xori", "t,r,i", op[0], op[0], BFD_RELOC_LO16); |
| 12193 | break; |
| 12194 | |
| 12195 | case M_SGE_I: /* X >= I <==> not (X < I) */ |
| 12196 | case M_SGEU_I: |
| 12197 | if (imm_expr.X_add_number >= -0x8000 |
| 12198 | && imm_expr.X_add_number < 0x8000) |
| 12199 | macro_build (&imm_expr, mask == M_SGE_I ? "slti" : "sltiu", "t,r,j", |
| 12200 | op[0], op[1], BFD_RELOC_LO16); |
| 12201 | else |
| 12202 | { |
| 12203 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 12204 | macro_build (NULL, mask == M_SGE_I ? "slt" : "sltu", "d,v,t", |
| 12205 | op[0], op[1], AT); |
| 12206 | used_at = 1; |
| 12207 | } |
| 12208 | macro_build (&expr1, "xori", "t,r,i", op[0], op[0], BFD_RELOC_LO16); |
| 12209 | break; |
| 12210 | |
| 12211 | case M_SGT: /* X > Y <==> Y < X */ |
| 12212 | s = "slt"; |
| 12213 | goto sgt; |
| 12214 | case M_SGTU: |
| 12215 | s = "sltu"; |
| 12216 | sgt: |
| 12217 | macro_build (NULL, s, "d,v,t", op[0], op[2], op[1]); |
| 12218 | break; |
| 12219 | |
| 12220 | case M_SGT_I: /* X > I <==> I < X */ |
| 12221 | s = "slt"; |
| 12222 | goto sgti; |
| 12223 | case M_SGTU_I: |
| 12224 | s = "sltu"; |
| 12225 | sgti: |
| 12226 | used_at = 1; |
| 12227 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 12228 | macro_build (NULL, s, "d,v,t", op[0], AT, op[1]); |
| 12229 | break; |
| 12230 | |
| 12231 | case M_SLE: /* X <= Y <==> Y >= X <==> not (Y < X) */ |
| 12232 | s = "slt"; |
| 12233 | goto sle; |
| 12234 | case M_SLEU: |
| 12235 | s = "sltu"; |
| 12236 | sle: |
| 12237 | macro_build (NULL, s, "d,v,t", op[0], op[2], op[1]); |
| 12238 | macro_build (&expr1, "xori", "t,r,i", op[0], op[0], BFD_RELOC_LO16); |
| 12239 | break; |
| 12240 | |
| 12241 | case M_SLE_I: /* X <= I <==> I >= X <==> not (I < X) */ |
| 12242 | s = "slt"; |
| 12243 | goto slei; |
| 12244 | case M_SLEU_I: |
| 12245 | s = "sltu"; |
| 12246 | slei: |
| 12247 | used_at = 1; |
| 12248 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 12249 | macro_build (NULL, s, "d,v,t", op[0], AT, op[1]); |
| 12250 | macro_build (&expr1, "xori", "t,r,i", op[0], op[0], BFD_RELOC_LO16); |
| 12251 | break; |
| 12252 | |
| 12253 | case M_SLT_I: |
| 12254 | if (imm_expr.X_add_number >= -0x8000 |
| 12255 | && imm_expr.X_add_number < 0x8000) |
| 12256 | { |
| 12257 | macro_build (&imm_expr, "slti", "t,r,j", op[0], op[1], |
| 12258 | BFD_RELOC_LO16); |
| 12259 | break; |
| 12260 | } |
| 12261 | used_at = 1; |
| 12262 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 12263 | macro_build (NULL, "slt", "d,v,t", op[0], op[1], AT); |
| 12264 | break; |
| 12265 | |
| 12266 | case M_SLTU_I: |
| 12267 | if (imm_expr.X_add_number >= -0x8000 |
| 12268 | && imm_expr.X_add_number < 0x8000) |
| 12269 | { |
| 12270 | macro_build (&imm_expr, "sltiu", "t,r,j", op[0], op[1], |
| 12271 | BFD_RELOC_LO16); |
| 12272 | break; |
| 12273 | } |
| 12274 | used_at = 1; |
| 12275 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 12276 | macro_build (NULL, "sltu", "d,v,t", op[0], op[1], AT); |
| 12277 | break; |
| 12278 | |
| 12279 | case M_SNE: |
| 12280 | if (op[1] == 0) |
| 12281 | macro_build (NULL, "sltu", "d,v,t", op[0], 0, op[2]); |
| 12282 | else if (op[2] == 0) |
| 12283 | macro_build (NULL, "sltu", "d,v,t", op[0], 0, op[1]); |
| 12284 | else |
| 12285 | { |
| 12286 | macro_build (NULL, "xor", "d,v,t", op[0], op[1], op[2]); |
| 12287 | macro_build (NULL, "sltu", "d,v,t", op[0], 0, op[0]); |
| 12288 | } |
| 12289 | break; |
| 12290 | |
| 12291 | case M_SNE_I: |
| 12292 | if (imm_expr.X_add_number == 0) |
| 12293 | { |
| 12294 | macro_build (NULL, "sltu", "d,v,t", op[0], 0, op[1]); |
| 12295 | break; |
| 12296 | } |
| 12297 | if (op[1] == 0) |
| 12298 | { |
| 12299 | as_warn (_("instruction %s: result is always true"), |
| 12300 | ip->insn_mo->name); |
| 12301 | macro_build (&expr1, HAVE_32BIT_GPRS ? "addiu" : "daddiu", "t,r,j", |
| 12302 | op[0], 0, BFD_RELOC_LO16); |
| 12303 | break; |
| 12304 | } |
| 12305 | if (CPU_HAS_SEQ (mips_opts.arch) |
| 12306 | && -512 <= imm_expr.X_add_number |
| 12307 | && imm_expr.X_add_number < 512) |
| 12308 | { |
| 12309 | macro_build (NULL, "snei", "t,r,+Q", op[0], op[1], |
| 12310 | (int) imm_expr.X_add_number); |
| 12311 | break; |
| 12312 | } |
| 12313 | if (imm_expr.X_add_number >= 0 |
| 12314 | && imm_expr.X_add_number < 0x10000) |
| 12315 | { |
| 12316 | macro_build (&imm_expr, "xori", "t,r,i", op[0], op[1], |
| 12317 | BFD_RELOC_LO16); |
| 12318 | } |
| 12319 | else if (imm_expr.X_add_number > -0x8000 |
| 12320 | && imm_expr.X_add_number < 0) |
| 12321 | { |
| 12322 | imm_expr.X_add_number = -imm_expr.X_add_number; |
| 12323 | macro_build (&imm_expr, HAVE_32BIT_GPRS ? "addiu" : "daddiu", |
| 12324 | "t,r,j", op[0], op[1], BFD_RELOC_LO16); |
| 12325 | } |
| 12326 | else if (CPU_HAS_SEQ (mips_opts.arch)) |
| 12327 | { |
| 12328 | used_at = 1; |
| 12329 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 12330 | macro_build (NULL, "sne", "d,v,t", op[0], op[1], AT); |
| 12331 | break; |
| 12332 | } |
| 12333 | else |
| 12334 | { |
| 12335 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 12336 | macro_build (NULL, "xor", "d,v,t", op[0], op[1], AT); |
| 12337 | used_at = 1; |
| 12338 | } |
| 12339 | macro_build (NULL, "sltu", "d,v,t", op[0], 0, op[0]); |
| 12340 | break; |
| 12341 | |
| 12342 | case M_SUB_I: |
| 12343 | s = "addi"; |
| 12344 | s2 = "sub"; |
| 12345 | goto do_subi; |
| 12346 | case M_SUBU_I: |
| 12347 | s = "addiu"; |
| 12348 | s2 = "subu"; |
| 12349 | goto do_subi; |
| 12350 | case M_DSUB_I: |
| 12351 | dbl = 1; |
| 12352 | s = "daddi"; |
| 12353 | s2 = "dsub"; |
| 12354 | if (!mips_opts.micromips) |
| 12355 | goto do_subi; |
| 12356 | if (imm_expr.X_add_number > -0x200 |
| 12357 | && imm_expr.X_add_number <= 0x200) |
| 12358 | { |
| 12359 | macro_build (NULL, s, "t,r,.", op[0], op[1], |
| 12360 | (int) -imm_expr.X_add_number); |
| 12361 | break; |
| 12362 | } |
| 12363 | goto do_subi_i; |
| 12364 | case M_DSUBU_I: |
| 12365 | dbl = 1; |
| 12366 | s = "daddiu"; |
| 12367 | s2 = "dsubu"; |
| 12368 | do_subi: |
| 12369 | if (imm_expr.X_add_number > -0x8000 |
| 12370 | && imm_expr.X_add_number <= 0x8000) |
| 12371 | { |
| 12372 | imm_expr.X_add_number = -imm_expr.X_add_number; |
| 12373 | macro_build (&imm_expr, s, "t,r,j", op[0], op[1], BFD_RELOC_LO16); |
| 12374 | break; |
| 12375 | } |
| 12376 | do_subi_i: |
| 12377 | used_at = 1; |
| 12378 | load_register (AT, &imm_expr, dbl); |
| 12379 | macro_build (NULL, s2, "d,v,t", op[0], op[1], AT); |
| 12380 | break; |
| 12381 | |
| 12382 | case M_TEQ_I: |
| 12383 | s = "teq"; |
| 12384 | goto trap; |
| 12385 | case M_TGE_I: |
| 12386 | s = "tge"; |
| 12387 | goto trap; |
| 12388 | case M_TGEU_I: |
| 12389 | s = "tgeu"; |
| 12390 | goto trap; |
| 12391 | case M_TLT_I: |
| 12392 | s = "tlt"; |
| 12393 | goto trap; |
| 12394 | case M_TLTU_I: |
| 12395 | s = "tltu"; |
| 12396 | goto trap; |
| 12397 | case M_TNE_I: |
| 12398 | s = "tne"; |
| 12399 | trap: |
| 12400 | used_at = 1; |
| 12401 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 12402 | macro_build (NULL, s, "s,t", op[0], AT); |
| 12403 | break; |
| 12404 | |
| 12405 | case M_TRUNCWS: |
| 12406 | case M_TRUNCWD: |
| 12407 | gas_assert (!mips_opts.micromips); |
| 12408 | gas_assert (mips_opts.isa == ISA_MIPS1); |
| 12409 | used_at = 1; |
| 12410 | |
| 12411 | /* |
| 12412 | * Is the double cfc1 instruction a bug in the mips assembler; |
| 12413 | * or is there a reason for it? |
| 12414 | */ |
| 12415 | start_noreorder (); |
| 12416 | macro_build (NULL, "cfc1", "t,G", op[2], RA); |
| 12417 | macro_build (NULL, "cfc1", "t,G", op[2], RA); |
| 12418 | macro_build (NULL, "nop", ""); |
| 12419 | expr1.X_add_number = 3; |
| 12420 | macro_build (&expr1, "ori", "t,r,i", AT, op[2], BFD_RELOC_LO16); |
| 12421 | expr1.X_add_number = 2; |
| 12422 | macro_build (&expr1, "xori", "t,r,i", AT, AT, BFD_RELOC_LO16); |
| 12423 | macro_build (NULL, "ctc1", "t,G", AT, RA); |
| 12424 | macro_build (NULL, "nop", ""); |
| 12425 | macro_build (NULL, mask == M_TRUNCWD ? "cvt.w.d" : "cvt.w.s", "D,S", |
| 12426 | op[0], op[1]); |
| 12427 | macro_build (NULL, "ctc1", "t,G", op[2], RA); |
| 12428 | macro_build (NULL, "nop", ""); |
| 12429 | end_noreorder (); |
| 12430 | break; |
| 12431 | |
| 12432 | case M_ULH_AB: |
| 12433 | s = "lb"; |
| 12434 | s2 = "lbu"; |
| 12435 | off = 1; |
| 12436 | goto uld_st; |
| 12437 | case M_ULHU_AB: |
| 12438 | s = "lbu"; |
| 12439 | s2 = "lbu"; |
| 12440 | off = 1; |
| 12441 | goto uld_st; |
| 12442 | case M_ULW_AB: |
| 12443 | s = "lwl"; |
| 12444 | s2 = "lwr"; |
| 12445 | offbits = (mips_opts.micromips ? 12 : 16); |
| 12446 | off = 3; |
| 12447 | goto uld_st; |
| 12448 | case M_ULD_AB: |
| 12449 | s = "ldl"; |
| 12450 | s2 = "ldr"; |
| 12451 | offbits = (mips_opts.micromips ? 12 : 16); |
| 12452 | off = 7; |
| 12453 | goto uld_st; |
| 12454 | case M_USH_AB: |
| 12455 | s = "sb"; |
| 12456 | s2 = "sb"; |
| 12457 | off = 1; |
| 12458 | ust = 1; |
| 12459 | goto uld_st; |
| 12460 | case M_USW_AB: |
| 12461 | s = "swl"; |
| 12462 | s2 = "swr"; |
| 12463 | offbits = (mips_opts.micromips ? 12 : 16); |
| 12464 | off = 3; |
| 12465 | ust = 1; |
| 12466 | goto uld_st; |
| 12467 | case M_USD_AB: |
| 12468 | s = "sdl"; |
| 12469 | s2 = "sdr"; |
| 12470 | offbits = (mips_opts.micromips ? 12 : 16); |
| 12471 | off = 7; |
| 12472 | ust = 1; |
| 12473 | |
| 12474 | uld_st: |
| 12475 | breg = op[2]; |
| 12476 | large_offset = !small_offset_p (off, align, offbits); |
| 12477 | ep = &offset_expr; |
| 12478 | expr1.X_add_number = 0; |
| 12479 | if (large_offset) |
| 12480 | { |
| 12481 | used_at = 1; |
| 12482 | tempreg = AT; |
| 12483 | if (small_offset_p (0, align, 16)) |
| 12484 | macro_build (ep, ADDRESS_ADDI_INSN, "t,r,j", tempreg, breg, -1, |
| 12485 | offset_reloc[0], offset_reloc[1], offset_reloc[2]); |
| 12486 | else |
| 12487 | { |
| 12488 | load_address (tempreg, ep, &used_at); |
| 12489 | if (breg != 0) |
| 12490 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 12491 | tempreg, tempreg, breg); |
| 12492 | } |
| 12493 | offset_reloc[0] = BFD_RELOC_LO16; |
| 12494 | offset_reloc[1] = BFD_RELOC_UNUSED; |
| 12495 | offset_reloc[2] = BFD_RELOC_UNUSED; |
| 12496 | breg = tempreg; |
| 12497 | tempreg = op[0]; |
| 12498 | ep = &expr1; |
| 12499 | } |
| 12500 | else if (!ust && op[0] == breg) |
| 12501 | { |
| 12502 | used_at = 1; |
| 12503 | tempreg = AT; |
| 12504 | } |
| 12505 | else |
| 12506 | tempreg = op[0]; |
| 12507 | |
| 12508 | if (off == 1) |
| 12509 | goto ulh_sh; |
| 12510 | |
| 12511 | if (!target_big_endian) |
| 12512 | ep->X_add_number += off; |
| 12513 | if (offbits == 12) |
| 12514 | macro_build (NULL, s, "t,~(b)", tempreg, (int) ep->X_add_number, breg); |
| 12515 | else |
| 12516 | macro_build (ep, s, "t,o(b)", tempreg, -1, |
| 12517 | offset_reloc[0], offset_reloc[1], offset_reloc[2], breg); |
| 12518 | |
| 12519 | if (!target_big_endian) |
| 12520 | ep->X_add_number -= off; |
| 12521 | else |
| 12522 | ep->X_add_number += off; |
| 12523 | if (offbits == 12) |
| 12524 | macro_build (NULL, s2, "t,~(b)", |
| 12525 | tempreg, (int) ep->X_add_number, breg); |
| 12526 | else |
| 12527 | macro_build (ep, s2, "t,o(b)", tempreg, -1, |
| 12528 | offset_reloc[0], offset_reloc[1], offset_reloc[2], breg); |
| 12529 | |
| 12530 | /* If necessary, move the result in tempreg to the final destination. */ |
| 12531 | if (!ust && op[0] != tempreg) |
| 12532 | { |
| 12533 | /* Protect second load's delay slot. */ |
| 12534 | load_delay_nop (); |
| 12535 | move_register (op[0], tempreg); |
| 12536 | } |
| 12537 | break; |
| 12538 | |
| 12539 | ulh_sh: |
| 12540 | used_at = 1; |
| 12541 | if (target_big_endian == ust) |
| 12542 | ep->X_add_number += off; |
| 12543 | tempreg = ust || large_offset ? op[0] : AT; |
| 12544 | macro_build (ep, s, "t,o(b)", tempreg, -1, |
| 12545 | offset_reloc[0], offset_reloc[1], offset_reloc[2], breg); |
| 12546 | |
| 12547 | /* For halfword transfers we need a temporary register to shuffle |
| 12548 | bytes. Unfortunately for M_USH_A we have none available before |
| 12549 | the next store as AT holds the base address. We deal with this |
| 12550 | case by clobbering TREG and then restoring it as with ULH. */ |
| 12551 | tempreg = ust == large_offset ? op[0] : AT; |
| 12552 | if (ust) |
| 12553 | macro_build (NULL, "srl", SHFT_FMT, tempreg, op[0], 8); |
| 12554 | |
| 12555 | if (target_big_endian == ust) |
| 12556 | ep->X_add_number -= off; |
| 12557 | else |
| 12558 | ep->X_add_number += off; |
| 12559 | macro_build (ep, s2, "t,o(b)", tempreg, -1, |
| 12560 | offset_reloc[0], offset_reloc[1], offset_reloc[2], breg); |
| 12561 | |
| 12562 | /* For M_USH_A re-retrieve the LSB. */ |
| 12563 | if (ust && large_offset) |
| 12564 | { |
| 12565 | if (target_big_endian) |
| 12566 | ep->X_add_number += off; |
| 12567 | else |
| 12568 | ep->X_add_number -= off; |
| 12569 | macro_build (&expr1, "lbu", "t,o(b)", AT, -1, |
| 12570 | offset_reloc[0], offset_reloc[1], offset_reloc[2], AT); |
| 12571 | } |
| 12572 | /* For ULH and M_USH_A OR the LSB in. */ |
| 12573 | if (!ust || large_offset) |
| 12574 | { |
| 12575 | tempreg = !large_offset ? AT : op[0]; |
| 12576 | macro_build (NULL, "sll", SHFT_FMT, tempreg, tempreg, 8); |
| 12577 | macro_build (NULL, "or", "d,v,t", op[0], op[0], AT); |
| 12578 | } |
| 12579 | break; |
| 12580 | |
| 12581 | default: |
| 12582 | /* FIXME: Check if this is one of the itbl macros, since they |
| 12583 | are added dynamically. */ |
| 12584 | as_bad (_("macro %s not implemented yet"), ip->insn_mo->name); |
| 12585 | break; |
| 12586 | } |
| 12587 | if (!mips_opts.at && used_at) |
| 12588 | as_bad (_("macro used $at after \".set noat\"")); |
| 12589 | } |
| 12590 | |
| 12591 | /* Implement macros in mips16 mode. */ |
| 12592 | |
| 12593 | static void |
| 12594 | mips16_macro (struct mips_cl_insn *ip) |
| 12595 | { |
| 12596 | const struct mips_operand_array *operands; |
| 12597 | int mask; |
| 12598 | int tmp; |
| 12599 | expressionS expr1; |
| 12600 | int dbl; |
| 12601 | const char *s, *s2, *s3; |
| 12602 | unsigned int op[MAX_OPERANDS]; |
| 12603 | unsigned int i; |
| 12604 | |
| 12605 | mask = ip->insn_mo->mask; |
| 12606 | |
| 12607 | operands = insn_operands (ip); |
| 12608 | for (i = 0; i < MAX_OPERANDS; i++) |
| 12609 | if (operands->operand[i]) |
| 12610 | op[i] = insn_extract_operand (ip, operands->operand[i]); |
| 12611 | else |
| 12612 | op[i] = -1; |
| 12613 | |
| 12614 | expr1.X_op = O_constant; |
| 12615 | expr1.X_op_symbol = NULL; |
| 12616 | expr1.X_add_symbol = NULL; |
| 12617 | expr1.X_add_number = 1; |
| 12618 | |
| 12619 | dbl = 0; |
| 12620 | |
| 12621 | switch (mask) |
| 12622 | { |
| 12623 | default: |
| 12624 | abort (); |
| 12625 | |
| 12626 | case M_DDIV_3: |
| 12627 | dbl = 1; |
| 12628 | case M_DIV_3: |
| 12629 | s = "mflo"; |
| 12630 | goto do_div3; |
| 12631 | case M_DREM_3: |
| 12632 | dbl = 1; |
| 12633 | case M_REM_3: |
| 12634 | s = "mfhi"; |
| 12635 | do_div3: |
| 12636 | start_noreorder (); |
| 12637 | macro_build (NULL, dbl ? "ddiv" : "div", "0,x,y", op[1], op[2]); |
| 12638 | expr1.X_add_number = 2; |
| 12639 | macro_build (&expr1, "bnez", "x,p", op[2]); |
| 12640 | macro_build (NULL, "break", "6", 7); |
| 12641 | |
| 12642 | /* FIXME: The normal code checks for of -1 / -0x80000000 here, |
| 12643 | since that causes an overflow. We should do that as well, |
| 12644 | but I don't see how to do the comparisons without a temporary |
| 12645 | register. */ |
| 12646 | end_noreorder (); |
| 12647 | macro_build (NULL, s, "x", op[0]); |
| 12648 | break; |
| 12649 | |
| 12650 | case M_DIVU_3: |
| 12651 | s = "divu"; |
| 12652 | s2 = "mflo"; |
| 12653 | goto do_divu3; |
| 12654 | case M_REMU_3: |
| 12655 | s = "divu"; |
| 12656 | s2 = "mfhi"; |
| 12657 | goto do_divu3; |
| 12658 | case M_DDIVU_3: |
| 12659 | s = "ddivu"; |
| 12660 | s2 = "mflo"; |
| 12661 | goto do_divu3; |
| 12662 | case M_DREMU_3: |
| 12663 | s = "ddivu"; |
| 12664 | s2 = "mfhi"; |
| 12665 | do_divu3: |
| 12666 | start_noreorder (); |
| 12667 | macro_build (NULL, s, "0,x,y", op[1], op[2]); |
| 12668 | expr1.X_add_number = 2; |
| 12669 | macro_build (&expr1, "bnez", "x,p", op[2]); |
| 12670 | macro_build (NULL, "break", "6", 7); |
| 12671 | end_noreorder (); |
| 12672 | macro_build (NULL, s2, "x", op[0]); |
| 12673 | break; |
| 12674 | |
| 12675 | case M_DMUL: |
| 12676 | dbl = 1; |
| 12677 | case M_MUL: |
| 12678 | macro_build (NULL, dbl ? "dmultu" : "multu", "x,y", op[1], op[2]); |
| 12679 | macro_build (NULL, "mflo", "x", op[0]); |
| 12680 | break; |
| 12681 | |
| 12682 | case M_DSUBU_I: |
| 12683 | dbl = 1; |
| 12684 | goto do_subu; |
| 12685 | case M_SUBU_I: |
| 12686 | do_subu: |
| 12687 | imm_expr.X_add_number = -imm_expr.X_add_number; |
| 12688 | macro_build (&imm_expr, dbl ? "daddiu" : "addiu", "y,x,4", op[0], op[1]); |
| 12689 | break; |
| 12690 | |
| 12691 | case M_SUBU_I_2: |
| 12692 | imm_expr.X_add_number = -imm_expr.X_add_number; |
| 12693 | macro_build (&imm_expr, "addiu", "x,k", op[0]); |
| 12694 | break; |
| 12695 | |
| 12696 | case M_DSUBU_I_2: |
| 12697 | imm_expr.X_add_number = -imm_expr.X_add_number; |
| 12698 | macro_build (&imm_expr, "daddiu", "y,j", op[0]); |
| 12699 | break; |
| 12700 | |
| 12701 | case M_BEQ: |
| 12702 | s = "cmp"; |
| 12703 | s2 = "bteqz"; |
| 12704 | goto do_branch; |
| 12705 | case M_BNE: |
| 12706 | s = "cmp"; |
| 12707 | s2 = "btnez"; |
| 12708 | goto do_branch; |
| 12709 | case M_BLT: |
| 12710 | s = "slt"; |
| 12711 | s2 = "btnez"; |
| 12712 | goto do_branch; |
| 12713 | case M_BLTU: |
| 12714 | s = "sltu"; |
| 12715 | s2 = "btnez"; |
| 12716 | goto do_branch; |
| 12717 | case M_BLE: |
| 12718 | s = "slt"; |
| 12719 | s2 = "bteqz"; |
| 12720 | goto do_reverse_branch; |
| 12721 | case M_BLEU: |
| 12722 | s = "sltu"; |
| 12723 | s2 = "bteqz"; |
| 12724 | goto do_reverse_branch; |
| 12725 | case M_BGE: |
| 12726 | s = "slt"; |
| 12727 | s2 = "bteqz"; |
| 12728 | goto do_branch; |
| 12729 | case M_BGEU: |
| 12730 | s = "sltu"; |
| 12731 | s2 = "bteqz"; |
| 12732 | goto do_branch; |
| 12733 | case M_BGT: |
| 12734 | s = "slt"; |
| 12735 | s2 = "btnez"; |
| 12736 | goto do_reverse_branch; |
| 12737 | case M_BGTU: |
| 12738 | s = "sltu"; |
| 12739 | s2 = "btnez"; |
| 12740 | |
| 12741 | do_reverse_branch: |
| 12742 | tmp = op[1]; |
| 12743 | op[1] = op[0]; |
| 12744 | op[0] = tmp; |
| 12745 | |
| 12746 | do_branch: |
| 12747 | macro_build (NULL, s, "x,y", op[0], op[1]); |
| 12748 | macro_build (&offset_expr, s2, "p"); |
| 12749 | break; |
| 12750 | |
| 12751 | case M_BEQ_I: |
| 12752 | s = "cmpi"; |
| 12753 | s2 = "bteqz"; |
| 12754 | s3 = "x,U"; |
| 12755 | goto do_branch_i; |
| 12756 | case M_BNE_I: |
| 12757 | s = "cmpi"; |
| 12758 | s2 = "btnez"; |
| 12759 | s3 = "x,U"; |
| 12760 | goto do_branch_i; |
| 12761 | case M_BLT_I: |
| 12762 | s = "slti"; |
| 12763 | s2 = "btnez"; |
| 12764 | s3 = "x,8"; |
| 12765 | goto do_branch_i; |
| 12766 | case M_BLTU_I: |
| 12767 | s = "sltiu"; |
| 12768 | s2 = "btnez"; |
| 12769 | s3 = "x,8"; |
| 12770 | goto do_branch_i; |
| 12771 | case M_BLE_I: |
| 12772 | s = "slti"; |
| 12773 | s2 = "btnez"; |
| 12774 | s3 = "x,8"; |
| 12775 | goto do_addone_branch_i; |
| 12776 | case M_BLEU_I: |
| 12777 | s = "sltiu"; |
| 12778 | s2 = "btnez"; |
| 12779 | s3 = "x,8"; |
| 12780 | goto do_addone_branch_i; |
| 12781 | case M_BGE_I: |
| 12782 | s = "slti"; |
| 12783 | s2 = "bteqz"; |
| 12784 | s3 = "x,8"; |
| 12785 | goto do_branch_i; |
| 12786 | case M_BGEU_I: |
| 12787 | s = "sltiu"; |
| 12788 | s2 = "bteqz"; |
| 12789 | s3 = "x,8"; |
| 12790 | goto do_branch_i; |
| 12791 | case M_BGT_I: |
| 12792 | s = "slti"; |
| 12793 | s2 = "bteqz"; |
| 12794 | s3 = "x,8"; |
| 12795 | goto do_addone_branch_i; |
| 12796 | case M_BGTU_I: |
| 12797 | s = "sltiu"; |
| 12798 | s2 = "bteqz"; |
| 12799 | s3 = "x,8"; |
| 12800 | |
| 12801 | do_addone_branch_i: |
| 12802 | ++imm_expr.X_add_number; |
| 12803 | |
| 12804 | do_branch_i: |
| 12805 | macro_build (&imm_expr, s, s3, op[0]); |
| 12806 | macro_build (&offset_expr, s2, "p"); |
| 12807 | break; |
| 12808 | |
| 12809 | case M_ABS: |
| 12810 | expr1.X_add_number = 0; |
| 12811 | macro_build (&expr1, "slti", "x,8", op[1]); |
| 12812 | if (op[0] != op[1]) |
| 12813 | macro_build (NULL, "move", "y,X", op[0], mips16_to_32_reg_map[op[1]]); |
| 12814 | expr1.X_add_number = 2; |
| 12815 | macro_build (&expr1, "bteqz", "p"); |
| 12816 | macro_build (NULL, "neg", "x,w", op[0], op[0]); |
| 12817 | break; |
| 12818 | } |
| 12819 | } |
| 12820 | |
| 12821 | /* Look up instruction [START, START + LENGTH) in HASH. Record any extra |
| 12822 | opcode bits in *OPCODE_EXTRA. */ |
| 12823 | |
| 12824 | static struct mips_opcode * |
| 12825 | mips_lookup_insn (struct hash_control *hash, const char *start, |
| 12826 | ssize_t length, unsigned int *opcode_extra) |
| 12827 | { |
| 12828 | char *name, *dot, *p; |
| 12829 | unsigned int mask, suffix; |
| 12830 | ssize_t opend; |
| 12831 | struct mips_opcode *insn; |
| 12832 | |
| 12833 | /* Make a copy of the instruction so that we can fiddle with it. */ |
| 12834 | name = alloca (length + 1); |
| 12835 | memcpy (name, start, length); |
| 12836 | name[length] = '\0'; |
| 12837 | |
| 12838 | /* Look up the instruction as-is. */ |
| 12839 | insn = (struct mips_opcode *) hash_find (hash, name); |
| 12840 | if (insn) |
| 12841 | return insn; |
| 12842 | |
| 12843 | dot = strchr (name, '.'); |
| 12844 | if (dot && dot[1]) |
| 12845 | { |
| 12846 | /* Try to interpret the text after the dot as a VU0 channel suffix. */ |
| 12847 | p = mips_parse_vu0_channels (dot + 1, &mask); |
| 12848 | if (*p == 0 && mask != 0) |
| 12849 | { |
| 12850 | *dot = 0; |
| 12851 | insn = (struct mips_opcode *) hash_find (hash, name); |
| 12852 | *dot = '.'; |
| 12853 | if (insn && (insn->pinfo2 & INSN2_VU0_CHANNEL_SUFFIX) != 0) |
| 12854 | { |
| 12855 | *opcode_extra |= mask << mips_vu0_channel_mask.lsb; |
| 12856 | return insn; |
| 12857 | } |
| 12858 | } |
| 12859 | } |
| 12860 | |
| 12861 | if (mips_opts.micromips) |
| 12862 | { |
| 12863 | /* See if there's an instruction size override suffix, |
| 12864 | either `16' or `32', at the end of the mnemonic proper, |
| 12865 | that defines the operation, i.e. before the first `.' |
| 12866 | character if any. Strip it and retry. */ |
| 12867 | opend = dot != NULL ? dot - name : length; |
| 12868 | if (opend >= 3 && name[opend - 2] == '1' && name[opend - 1] == '6') |
| 12869 | suffix = 2; |
| 12870 | else if (name[opend - 2] == '3' && name[opend - 1] == '2') |
| 12871 | suffix = 4; |
| 12872 | else |
| 12873 | suffix = 0; |
| 12874 | if (suffix) |
| 12875 | { |
| 12876 | memcpy (name + opend - 2, name + opend, length - opend + 1); |
| 12877 | insn = (struct mips_opcode *) hash_find (hash, name); |
| 12878 | if (insn) |
| 12879 | { |
| 12880 | forced_insn_length = suffix; |
| 12881 | return insn; |
| 12882 | } |
| 12883 | } |
| 12884 | } |
| 12885 | |
| 12886 | return NULL; |
| 12887 | } |
| 12888 | |
| 12889 | /* Assemble an instruction into its binary format. If the instruction |
| 12890 | is a macro, set imm_expr and offset_expr to the values associated |
| 12891 | with "I" and "A" operands respectively. Otherwise store the value |
| 12892 | of the relocatable field (if any) in offset_expr. In both cases |
| 12893 | set offset_reloc to the relocation operators applied to offset_expr. */ |
| 12894 | |
| 12895 | static void |
| 12896 | mips_ip (char *str, struct mips_cl_insn *insn) |
| 12897 | { |
| 12898 | const struct mips_opcode *first, *past; |
| 12899 | struct hash_control *hash; |
| 12900 | char format; |
| 12901 | size_t end; |
| 12902 | struct mips_operand_token *tokens; |
| 12903 | unsigned int opcode_extra; |
| 12904 | |
| 12905 | if (mips_opts.micromips) |
| 12906 | { |
| 12907 | hash = micromips_op_hash; |
| 12908 | past = µmips_opcodes[bfd_micromips_num_opcodes]; |
| 12909 | } |
| 12910 | else |
| 12911 | { |
| 12912 | hash = op_hash; |
| 12913 | past = &mips_opcodes[NUMOPCODES]; |
| 12914 | } |
| 12915 | forced_insn_length = 0; |
| 12916 | opcode_extra = 0; |
| 12917 | |
| 12918 | /* We first try to match an instruction up to a space or to the end. */ |
| 12919 | for (end = 0; str[end] != '\0' && !ISSPACE (str[end]); end++) |
| 12920 | continue; |
| 12921 | |
| 12922 | first = mips_lookup_insn (hash, str, end, &opcode_extra); |
| 12923 | if (first == NULL) |
| 12924 | { |
| 12925 | set_insn_error (0, _("unrecognized opcode")); |
| 12926 | return; |
| 12927 | } |
| 12928 | |
| 12929 | if (strcmp (first->name, "li.s") == 0) |
| 12930 | format = 'f'; |
| 12931 | else if (strcmp (first->name, "li.d") == 0) |
| 12932 | format = 'd'; |
| 12933 | else |
| 12934 | format = 0; |
| 12935 | tokens = mips_parse_arguments (str + end, format); |
| 12936 | if (!tokens) |
| 12937 | return; |
| 12938 | |
| 12939 | if (!match_insns (insn, first, past, tokens, opcode_extra, FALSE) |
| 12940 | && !match_insns (insn, first, past, tokens, opcode_extra, TRUE)) |
| 12941 | set_insn_error (0, _("invalid operands")); |
| 12942 | |
| 12943 | obstack_free (&mips_operand_tokens, tokens); |
| 12944 | } |
| 12945 | |
| 12946 | /* As for mips_ip, but used when assembling MIPS16 code. |
| 12947 | Also set forced_insn_length to the resulting instruction size in |
| 12948 | bytes if the user explicitly requested a small or extended instruction. */ |
| 12949 | |
| 12950 | static void |
| 12951 | mips16_ip (char *str, struct mips_cl_insn *insn) |
| 12952 | { |
| 12953 | char *end, *s, c; |
| 12954 | struct mips_opcode *first; |
| 12955 | struct mips_operand_token *tokens; |
| 12956 | |
| 12957 | forced_insn_length = 0; |
| 12958 | |
| 12959 | for (s = str; ISLOWER (*s); ++s) |
| 12960 | ; |
| 12961 | end = s; |
| 12962 | c = *end; |
| 12963 | switch (c) |
| 12964 | { |
| 12965 | case '\0': |
| 12966 | break; |
| 12967 | |
| 12968 | case ' ': |
| 12969 | s++; |
| 12970 | break; |
| 12971 | |
| 12972 | case '.': |
| 12973 | if (s[1] == 't' && s[2] == ' ') |
| 12974 | { |
| 12975 | forced_insn_length = 2; |
| 12976 | s += 3; |
| 12977 | break; |
| 12978 | } |
| 12979 | else if (s[1] == 'e' && s[2] == ' ') |
| 12980 | { |
| 12981 | forced_insn_length = 4; |
| 12982 | s += 3; |
| 12983 | break; |
| 12984 | } |
| 12985 | /* Fall through. */ |
| 12986 | default: |
| 12987 | set_insn_error (0, _("unrecognized opcode")); |
| 12988 | return; |
| 12989 | } |
| 12990 | |
| 12991 | if (mips_opts.noautoextend && !forced_insn_length) |
| 12992 | forced_insn_length = 2; |
| 12993 | |
| 12994 | *end = 0; |
| 12995 | first = (struct mips_opcode *) hash_find (mips16_op_hash, str); |
| 12996 | *end = c; |
| 12997 | |
| 12998 | if (!first) |
| 12999 | { |
| 13000 | set_insn_error (0, _("unrecognized opcode")); |
| 13001 | return; |
| 13002 | } |
| 13003 | |
| 13004 | tokens = mips_parse_arguments (s, 0); |
| 13005 | if (!tokens) |
| 13006 | return; |
| 13007 | |
| 13008 | if (!match_mips16_insns (insn, first, tokens)) |
| 13009 | set_insn_error (0, _("invalid operands")); |
| 13010 | |
| 13011 | obstack_free (&mips_operand_tokens, tokens); |
| 13012 | } |
| 13013 | |
| 13014 | /* Marshal immediate value VAL for an extended MIPS16 instruction. |
| 13015 | NBITS is the number of significant bits in VAL. */ |
| 13016 | |
| 13017 | static unsigned long |
| 13018 | mips16_immed_extend (offsetT val, unsigned int nbits) |
| 13019 | { |
| 13020 | int extval; |
| 13021 | if (nbits == 16) |
| 13022 | { |
| 13023 | extval = ((val >> 11) & 0x1f) | (val & 0x7e0); |
| 13024 | val &= 0x1f; |
| 13025 | } |
| 13026 | else if (nbits == 15) |
| 13027 | { |
| 13028 | extval = ((val >> 11) & 0xf) | (val & 0x7f0); |
| 13029 | val &= 0xf; |
| 13030 | } |
| 13031 | else |
| 13032 | { |
| 13033 | extval = ((val & 0x1f) << 6) | (val & 0x20); |
| 13034 | val = 0; |
| 13035 | } |
| 13036 | return (extval << 16) | val; |
| 13037 | } |
| 13038 | |
| 13039 | /* Like decode_mips16_operand, but require the operand to be defined and |
| 13040 | require it to be an integer. */ |
| 13041 | |
| 13042 | static const struct mips_int_operand * |
| 13043 | mips16_immed_operand (int type, bfd_boolean extended_p) |
| 13044 | { |
| 13045 | const struct mips_operand *operand; |
| 13046 | |
| 13047 | operand = decode_mips16_operand (type, extended_p); |
| 13048 | if (!operand || (operand->type != OP_INT && operand->type != OP_PCREL)) |
| 13049 | abort (); |
| 13050 | return (const struct mips_int_operand *) operand; |
| 13051 | } |
| 13052 | |
| 13053 | /* Return true if SVAL fits OPERAND. RELOC is as for mips16_immed. */ |
| 13054 | |
| 13055 | static bfd_boolean |
| 13056 | mips16_immed_in_range_p (const struct mips_int_operand *operand, |
| 13057 | bfd_reloc_code_real_type reloc, offsetT sval) |
| 13058 | { |
| 13059 | int min_val, max_val; |
| 13060 | |
| 13061 | min_val = mips_int_operand_min (operand); |
| 13062 | max_val = mips_int_operand_max (operand); |
| 13063 | if (reloc != BFD_RELOC_UNUSED) |
| 13064 | { |
| 13065 | if (min_val < 0) |
| 13066 | sval = SEXT_16BIT (sval); |
| 13067 | else |
| 13068 | sval &= 0xffff; |
| 13069 | } |
| 13070 | |
| 13071 | return (sval >= min_val |
| 13072 | && sval <= max_val |
| 13073 | && (sval & ((1 << operand->shift) - 1)) == 0); |
| 13074 | } |
| 13075 | |
| 13076 | /* Install immediate value VAL into MIPS16 instruction *INSN, |
| 13077 | extending it if necessary. The instruction in *INSN may |
| 13078 | already be extended. |
| 13079 | |
| 13080 | RELOC is the relocation that produced VAL, or BFD_RELOC_UNUSED |
| 13081 | if none. In the former case, VAL is a 16-bit number with no |
| 13082 | defined signedness. |
| 13083 | |
| 13084 | TYPE is the type of the immediate field. USER_INSN_LENGTH |
| 13085 | is the length that the user requested, or 0 if none. */ |
| 13086 | |
| 13087 | static void |
| 13088 | mips16_immed (char *file, unsigned int line, int type, |
| 13089 | bfd_reloc_code_real_type reloc, offsetT val, |
| 13090 | unsigned int user_insn_length, unsigned long *insn) |
| 13091 | { |
| 13092 | const struct mips_int_operand *operand; |
| 13093 | unsigned int uval, length; |
| 13094 | |
| 13095 | operand = mips16_immed_operand (type, FALSE); |
| 13096 | if (!mips16_immed_in_range_p (operand, reloc, val)) |
| 13097 | { |
| 13098 | /* We need an extended instruction. */ |
| 13099 | if (user_insn_length == 2) |
| 13100 | as_bad_where (file, line, _("invalid unextended operand value")); |
| 13101 | else |
| 13102 | *insn |= MIPS16_EXTEND; |
| 13103 | } |
| 13104 | else if (user_insn_length == 4) |
| 13105 | { |
| 13106 | /* The operand doesn't force an unextended instruction to be extended. |
| 13107 | Warn if the user wanted an extended instruction anyway. */ |
| 13108 | *insn |= MIPS16_EXTEND; |
| 13109 | as_warn_where (file, line, |
| 13110 | _("extended operand requested but not required")); |
| 13111 | } |
| 13112 | |
| 13113 | length = mips16_opcode_length (*insn); |
| 13114 | if (length == 4) |
| 13115 | { |
| 13116 | operand = mips16_immed_operand (type, TRUE); |
| 13117 | if (!mips16_immed_in_range_p (operand, reloc, val)) |
| 13118 | as_bad_where (file, line, |
| 13119 | _("operand value out of range for instruction")); |
| 13120 | } |
| 13121 | uval = ((unsigned int) val >> operand->shift) - operand->bias; |
| 13122 | if (length == 2) |
| 13123 | *insn = mips_insert_operand (&operand->root, *insn, uval); |
| 13124 | else |
| 13125 | *insn |= mips16_immed_extend (uval, operand->root.size); |
| 13126 | } |
| 13127 | \f |
| 13128 | struct percent_op_match |
| 13129 | { |
| 13130 | const char *str; |
| 13131 | bfd_reloc_code_real_type reloc; |
| 13132 | }; |
| 13133 | |
| 13134 | static const struct percent_op_match mips_percent_op[] = |
| 13135 | { |
| 13136 | {"%lo", BFD_RELOC_LO16}, |
| 13137 | {"%call_hi", BFD_RELOC_MIPS_CALL_HI16}, |
| 13138 | {"%call_lo", BFD_RELOC_MIPS_CALL_LO16}, |
| 13139 | {"%call16", BFD_RELOC_MIPS_CALL16}, |
| 13140 | {"%got_disp", BFD_RELOC_MIPS_GOT_DISP}, |
| 13141 | {"%got_page", BFD_RELOC_MIPS_GOT_PAGE}, |
| 13142 | {"%got_ofst", BFD_RELOC_MIPS_GOT_OFST}, |
| 13143 | {"%got_hi", BFD_RELOC_MIPS_GOT_HI16}, |
| 13144 | {"%got_lo", BFD_RELOC_MIPS_GOT_LO16}, |
| 13145 | {"%got", BFD_RELOC_MIPS_GOT16}, |
| 13146 | {"%gp_rel", BFD_RELOC_GPREL16}, |
| 13147 | {"%half", BFD_RELOC_16}, |
| 13148 | {"%highest", BFD_RELOC_MIPS_HIGHEST}, |
| 13149 | {"%higher", BFD_RELOC_MIPS_HIGHER}, |
| 13150 | {"%neg", BFD_RELOC_MIPS_SUB}, |
| 13151 | {"%tlsgd", BFD_RELOC_MIPS_TLS_GD}, |
| 13152 | {"%tlsldm", BFD_RELOC_MIPS_TLS_LDM}, |
| 13153 | {"%dtprel_hi", BFD_RELOC_MIPS_TLS_DTPREL_HI16}, |
| 13154 | {"%dtprel_lo", BFD_RELOC_MIPS_TLS_DTPREL_LO16}, |
| 13155 | {"%tprel_hi", BFD_RELOC_MIPS_TLS_TPREL_HI16}, |
| 13156 | {"%tprel_lo", BFD_RELOC_MIPS_TLS_TPREL_LO16}, |
| 13157 | {"%gottprel", BFD_RELOC_MIPS_TLS_GOTTPREL}, |
| 13158 | {"%hi", BFD_RELOC_HI16_S} |
| 13159 | }; |
| 13160 | |
| 13161 | static const struct percent_op_match mips16_percent_op[] = |
| 13162 | { |
| 13163 | {"%lo", BFD_RELOC_MIPS16_LO16}, |
| 13164 | {"%gprel", BFD_RELOC_MIPS16_GPREL}, |
| 13165 | {"%got", BFD_RELOC_MIPS16_GOT16}, |
| 13166 | {"%call16", BFD_RELOC_MIPS16_CALL16}, |
| 13167 | {"%hi", BFD_RELOC_MIPS16_HI16_S}, |
| 13168 | {"%tlsgd", BFD_RELOC_MIPS16_TLS_GD}, |
| 13169 | {"%tlsldm", BFD_RELOC_MIPS16_TLS_LDM}, |
| 13170 | {"%dtprel_hi", BFD_RELOC_MIPS16_TLS_DTPREL_HI16}, |
| 13171 | {"%dtprel_lo", BFD_RELOC_MIPS16_TLS_DTPREL_LO16}, |
| 13172 | {"%tprel_hi", BFD_RELOC_MIPS16_TLS_TPREL_HI16}, |
| 13173 | {"%tprel_lo", BFD_RELOC_MIPS16_TLS_TPREL_LO16}, |
| 13174 | {"%gottprel", BFD_RELOC_MIPS16_TLS_GOTTPREL} |
| 13175 | }; |
| 13176 | |
| 13177 | |
| 13178 | /* Return true if *STR points to a relocation operator. When returning true, |
| 13179 | move *STR over the operator and store its relocation code in *RELOC. |
| 13180 | Leave both *STR and *RELOC alone when returning false. */ |
| 13181 | |
| 13182 | static bfd_boolean |
| 13183 | parse_relocation (char **str, bfd_reloc_code_real_type *reloc) |
| 13184 | { |
| 13185 | const struct percent_op_match *percent_op; |
| 13186 | size_t limit, i; |
| 13187 | |
| 13188 | if (mips_opts.mips16) |
| 13189 | { |
| 13190 | percent_op = mips16_percent_op; |
| 13191 | limit = ARRAY_SIZE (mips16_percent_op); |
| 13192 | } |
| 13193 | else |
| 13194 | { |
| 13195 | percent_op = mips_percent_op; |
| 13196 | limit = ARRAY_SIZE (mips_percent_op); |
| 13197 | } |
| 13198 | |
| 13199 | for (i = 0; i < limit; i++) |
| 13200 | if (strncasecmp (*str, percent_op[i].str, strlen (percent_op[i].str)) == 0) |
| 13201 | { |
| 13202 | int len = strlen (percent_op[i].str); |
| 13203 | |
| 13204 | if (!ISSPACE ((*str)[len]) && (*str)[len] != '(') |
| 13205 | continue; |
| 13206 | |
| 13207 | *str += strlen (percent_op[i].str); |
| 13208 | *reloc = percent_op[i].reloc; |
| 13209 | |
| 13210 | /* Check whether the output BFD supports this relocation. |
| 13211 | If not, issue an error and fall back on something safe. */ |
| 13212 | if (!bfd_reloc_type_lookup (stdoutput, percent_op[i].reloc)) |
| 13213 | { |
| 13214 | as_bad (_("relocation %s isn't supported by the current ABI"), |
| 13215 | percent_op[i].str); |
| 13216 | *reloc = BFD_RELOC_UNUSED; |
| 13217 | } |
| 13218 | return TRUE; |
| 13219 | } |
| 13220 | return FALSE; |
| 13221 | } |
| 13222 | |
| 13223 | |
| 13224 | /* Parse string STR as a 16-bit relocatable operand. Store the |
| 13225 | expression in *EP and the relocations in the array starting |
| 13226 | at RELOC. Return the number of relocation operators used. |
| 13227 | |
| 13228 | On exit, EXPR_END points to the first character after the expression. */ |
| 13229 | |
| 13230 | static size_t |
| 13231 | my_getSmallExpression (expressionS *ep, bfd_reloc_code_real_type *reloc, |
| 13232 | char *str) |
| 13233 | { |
| 13234 | bfd_reloc_code_real_type reversed_reloc[3]; |
| 13235 | size_t reloc_index, i; |
| 13236 | int crux_depth, str_depth; |
| 13237 | char *crux; |
| 13238 | |
| 13239 | /* Search for the start of the main expression, recoding relocations |
| 13240 | in REVERSED_RELOC. End the loop with CRUX pointing to the start |
| 13241 | of the main expression and with CRUX_DEPTH containing the number |
| 13242 | of open brackets at that point. */ |
| 13243 | reloc_index = -1; |
| 13244 | str_depth = 0; |
| 13245 | do |
| 13246 | { |
| 13247 | reloc_index++; |
| 13248 | crux = str; |
| 13249 | crux_depth = str_depth; |
| 13250 | |
| 13251 | /* Skip over whitespace and brackets, keeping count of the number |
| 13252 | of brackets. */ |
| 13253 | while (*str == ' ' || *str == '\t' || *str == '(') |
| 13254 | if (*str++ == '(') |
| 13255 | str_depth++; |
| 13256 | } |
| 13257 | while (*str == '%' |
| 13258 | && reloc_index < (HAVE_NEWABI ? 3 : 1) |
| 13259 | && parse_relocation (&str, &reversed_reloc[reloc_index])); |
| 13260 | |
| 13261 | my_getExpression (ep, crux); |
| 13262 | str = expr_end; |
| 13263 | |
| 13264 | /* Match every open bracket. */ |
| 13265 | while (crux_depth > 0 && (*str == ')' || *str == ' ' || *str == '\t')) |
| 13266 | if (*str++ == ')') |
| 13267 | crux_depth--; |
| 13268 | |
| 13269 | if (crux_depth > 0) |
| 13270 | as_bad (_("unclosed '('")); |
| 13271 | |
| 13272 | expr_end = str; |
| 13273 | |
| 13274 | if (reloc_index != 0) |
| 13275 | { |
| 13276 | prev_reloc_op_frag = frag_now; |
| 13277 | for (i = 0; i < reloc_index; i++) |
| 13278 | reloc[i] = reversed_reloc[reloc_index - 1 - i]; |
| 13279 | } |
| 13280 | |
| 13281 | return reloc_index; |
| 13282 | } |
| 13283 | |
| 13284 | static void |
| 13285 | my_getExpression (expressionS *ep, char *str) |
| 13286 | { |
| 13287 | char *save_in; |
| 13288 | |
| 13289 | save_in = input_line_pointer; |
| 13290 | input_line_pointer = str; |
| 13291 | expression (ep); |
| 13292 | expr_end = input_line_pointer; |
| 13293 | input_line_pointer = save_in; |
| 13294 | } |
| 13295 | |
| 13296 | char * |
| 13297 | md_atof (int type, char *litP, int *sizeP) |
| 13298 | { |
| 13299 | return ieee_md_atof (type, litP, sizeP, target_big_endian); |
| 13300 | } |
| 13301 | |
| 13302 | void |
| 13303 | md_number_to_chars (char *buf, valueT val, int n) |
| 13304 | { |
| 13305 | if (target_big_endian) |
| 13306 | number_to_chars_bigendian (buf, val, n); |
| 13307 | else |
| 13308 | number_to_chars_littleendian (buf, val, n); |
| 13309 | } |
| 13310 | \f |
| 13311 | static int support_64bit_objects(void) |
| 13312 | { |
| 13313 | const char **list, **l; |
| 13314 | int yes; |
| 13315 | |
| 13316 | list = bfd_target_list (); |
| 13317 | for (l = list; *l != NULL; l++) |
| 13318 | if (strcmp (*l, ELF_TARGET ("elf64-", "big")) == 0 |
| 13319 | || strcmp (*l, ELF_TARGET ("elf64-", "little")) == 0) |
| 13320 | break; |
| 13321 | yes = (*l != NULL); |
| 13322 | free (list); |
| 13323 | return yes; |
| 13324 | } |
| 13325 | |
| 13326 | /* Set STRING_PTR (either &mips_arch_string or &mips_tune_string) to |
| 13327 | NEW_VALUE. Warn if another value was already specified. Note: |
| 13328 | we have to defer parsing the -march and -mtune arguments in order |
| 13329 | to handle 'from-abi' correctly, since the ABI might be specified |
| 13330 | in a later argument. */ |
| 13331 | |
| 13332 | static void |
| 13333 | mips_set_option_string (const char **string_ptr, const char *new_value) |
| 13334 | { |
| 13335 | if (*string_ptr != 0 && strcasecmp (*string_ptr, new_value) != 0) |
| 13336 | as_warn (_("a different %s was already specified, is now %s"), |
| 13337 | string_ptr == &mips_arch_string ? "-march" : "-mtune", |
| 13338 | new_value); |
| 13339 | |
| 13340 | *string_ptr = new_value; |
| 13341 | } |
| 13342 | |
| 13343 | int |
| 13344 | md_parse_option (int c, char *arg) |
| 13345 | { |
| 13346 | unsigned int i; |
| 13347 | |
| 13348 | for (i = 0; i < ARRAY_SIZE (mips_ases); i++) |
| 13349 | if (c == mips_ases[i].option_on || c == mips_ases[i].option_off) |
| 13350 | { |
| 13351 | file_ase_explicit |= mips_set_ase (&mips_ases[i], |
| 13352 | c == mips_ases[i].option_on); |
| 13353 | return 1; |
| 13354 | } |
| 13355 | |
| 13356 | switch (c) |
| 13357 | { |
| 13358 | case OPTION_CONSTRUCT_FLOATS: |
| 13359 | mips_disable_float_construction = 0; |
| 13360 | break; |
| 13361 | |
| 13362 | case OPTION_NO_CONSTRUCT_FLOATS: |
| 13363 | mips_disable_float_construction = 1; |
| 13364 | break; |
| 13365 | |
| 13366 | case OPTION_TRAP: |
| 13367 | mips_trap = 1; |
| 13368 | break; |
| 13369 | |
| 13370 | case OPTION_BREAK: |
| 13371 | mips_trap = 0; |
| 13372 | break; |
| 13373 | |
| 13374 | case OPTION_EB: |
| 13375 | target_big_endian = 1; |
| 13376 | break; |
| 13377 | |
| 13378 | case OPTION_EL: |
| 13379 | target_big_endian = 0; |
| 13380 | break; |
| 13381 | |
| 13382 | case 'O': |
| 13383 | if (arg == NULL) |
| 13384 | mips_optimize = 1; |
| 13385 | else if (arg[0] == '0') |
| 13386 | mips_optimize = 0; |
| 13387 | else if (arg[0] == '1') |
| 13388 | mips_optimize = 1; |
| 13389 | else |
| 13390 | mips_optimize = 2; |
| 13391 | break; |
| 13392 | |
| 13393 | case 'g': |
| 13394 | if (arg == NULL) |
| 13395 | mips_debug = 2; |
| 13396 | else |
| 13397 | mips_debug = atoi (arg); |
| 13398 | break; |
| 13399 | |
| 13400 | case OPTION_MIPS1: |
| 13401 | file_mips_isa = ISA_MIPS1; |
| 13402 | break; |
| 13403 | |
| 13404 | case OPTION_MIPS2: |
| 13405 | file_mips_isa = ISA_MIPS2; |
| 13406 | break; |
| 13407 | |
| 13408 | case OPTION_MIPS3: |
| 13409 | file_mips_isa = ISA_MIPS3; |
| 13410 | break; |
| 13411 | |
| 13412 | case OPTION_MIPS4: |
| 13413 | file_mips_isa = ISA_MIPS4; |
| 13414 | break; |
| 13415 | |
| 13416 | case OPTION_MIPS5: |
| 13417 | file_mips_isa = ISA_MIPS5; |
| 13418 | break; |
| 13419 | |
| 13420 | case OPTION_MIPS32: |
| 13421 | file_mips_isa = ISA_MIPS32; |
| 13422 | break; |
| 13423 | |
| 13424 | case OPTION_MIPS32R2: |
| 13425 | file_mips_isa = ISA_MIPS32R2; |
| 13426 | break; |
| 13427 | |
| 13428 | case OPTION_MIPS64R2: |
| 13429 | file_mips_isa = ISA_MIPS64R2; |
| 13430 | break; |
| 13431 | |
| 13432 | case OPTION_MIPS64: |
| 13433 | file_mips_isa = ISA_MIPS64; |
| 13434 | break; |
| 13435 | |
| 13436 | case OPTION_MTUNE: |
| 13437 | mips_set_option_string (&mips_tune_string, arg); |
| 13438 | break; |
| 13439 | |
| 13440 | case OPTION_MARCH: |
| 13441 | mips_set_option_string (&mips_arch_string, arg); |
| 13442 | break; |
| 13443 | |
| 13444 | case OPTION_M4650: |
| 13445 | mips_set_option_string (&mips_arch_string, "4650"); |
| 13446 | mips_set_option_string (&mips_tune_string, "4650"); |
| 13447 | break; |
| 13448 | |
| 13449 | case OPTION_NO_M4650: |
| 13450 | break; |
| 13451 | |
| 13452 | case OPTION_M4010: |
| 13453 | mips_set_option_string (&mips_arch_string, "4010"); |
| 13454 | mips_set_option_string (&mips_tune_string, "4010"); |
| 13455 | break; |
| 13456 | |
| 13457 | case OPTION_NO_M4010: |
| 13458 | break; |
| 13459 | |
| 13460 | case OPTION_M4100: |
| 13461 | mips_set_option_string (&mips_arch_string, "4100"); |
| 13462 | mips_set_option_string (&mips_tune_string, "4100"); |
| 13463 | break; |
| 13464 | |
| 13465 | case OPTION_NO_M4100: |
| 13466 | break; |
| 13467 | |
| 13468 | case OPTION_M3900: |
| 13469 | mips_set_option_string (&mips_arch_string, "3900"); |
| 13470 | mips_set_option_string (&mips_tune_string, "3900"); |
| 13471 | break; |
| 13472 | |
| 13473 | case OPTION_NO_M3900: |
| 13474 | break; |
| 13475 | |
| 13476 | case OPTION_MICROMIPS: |
| 13477 | if (mips_opts.mips16 == 1) |
| 13478 | { |
| 13479 | as_bad (_("-mmicromips cannot be used with -mips16")); |
| 13480 | return 0; |
| 13481 | } |
| 13482 | mips_opts.micromips = 1; |
| 13483 | mips_no_prev_insn (); |
| 13484 | break; |
| 13485 | |
| 13486 | case OPTION_NO_MICROMIPS: |
| 13487 | mips_opts.micromips = 0; |
| 13488 | mips_no_prev_insn (); |
| 13489 | break; |
| 13490 | |
| 13491 | case OPTION_MIPS16: |
| 13492 | if (mips_opts.micromips == 1) |
| 13493 | { |
| 13494 | as_bad (_("-mips16 cannot be used with -micromips")); |
| 13495 | return 0; |
| 13496 | } |
| 13497 | mips_opts.mips16 = 1; |
| 13498 | mips_no_prev_insn (); |
| 13499 | break; |
| 13500 | |
| 13501 | case OPTION_NO_MIPS16: |
| 13502 | mips_opts.mips16 = 0; |
| 13503 | mips_no_prev_insn (); |
| 13504 | break; |
| 13505 | |
| 13506 | case OPTION_FIX_24K: |
| 13507 | mips_fix_24k = 1; |
| 13508 | break; |
| 13509 | |
| 13510 | case OPTION_NO_FIX_24K: |
| 13511 | mips_fix_24k = 0; |
| 13512 | break; |
| 13513 | |
| 13514 | case OPTION_FIX_LOONGSON2F_JUMP: |
| 13515 | mips_fix_loongson2f_jump = TRUE; |
| 13516 | break; |
| 13517 | |
| 13518 | case OPTION_NO_FIX_LOONGSON2F_JUMP: |
| 13519 | mips_fix_loongson2f_jump = FALSE; |
| 13520 | break; |
| 13521 | |
| 13522 | case OPTION_FIX_LOONGSON2F_NOP: |
| 13523 | mips_fix_loongson2f_nop = TRUE; |
| 13524 | break; |
| 13525 | |
| 13526 | case OPTION_NO_FIX_LOONGSON2F_NOP: |
| 13527 | mips_fix_loongson2f_nop = FALSE; |
| 13528 | break; |
| 13529 | |
| 13530 | case OPTION_FIX_VR4120: |
| 13531 | mips_fix_vr4120 = 1; |
| 13532 | break; |
| 13533 | |
| 13534 | case OPTION_NO_FIX_VR4120: |
| 13535 | mips_fix_vr4120 = 0; |
| 13536 | break; |
| 13537 | |
| 13538 | case OPTION_FIX_VR4130: |
| 13539 | mips_fix_vr4130 = 1; |
| 13540 | break; |
| 13541 | |
| 13542 | case OPTION_NO_FIX_VR4130: |
| 13543 | mips_fix_vr4130 = 0; |
| 13544 | break; |
| 13545 | |
| 13546 | case OPTION_FIX_CN63XXP1: |
| 13547 | mips_fix_cn63xxp1 = TRUE; |
| 13548 | break; |
| 13549 | |
| 13550 | case OPTION_NO_FIX_CN63XXP1: |
| 13551 | mips_fix_cn63xxp1 = FALSE; |
| 13552 | break; |
| 13553 | |
| 13554 | case OPTION_RELAX_BRANCH: |
| 13555 | mips_relax_branch = 1; |
| 13556 | break; |
| 13557 | |
| 13558 | case OPTION_NO_RELAX_BRANCH: |
| 13559 | mips_relax_branch = 0; |
| 13560 | break; |
| 13561 | |
| 13562 | case OPTION_INSN32: |
| 13563 | mips_opts.insn32 = TRUE; |
| 13564 | break; |
| 13565 | |
| 13566 | case OPTION_NO_INSN32: |
| 13567 | mips_opts.insn32 = FALSE; |
| 13568 | break; |
| 13569 | |
| 13570 | case OPTION_MSHARED: |
| 13571 | mips_in_shared = TRUE; |
| 13572 | break; |
| 13573 | |
| 13574 | case OPTION_MNO_SHARED: |
| 13575 | mips_in_shared = FALSE; |
| 13576 | break; |
| 13577 | |
| 13578 | case OPTION_MSYM32: |
| 13579 | mips_opts.sym32 = TRUE; |
| 13580 | break; |
| 13581 | |
| 13582 | case OPTION_MNO_SYM32: |
| 13583 | mips_opts.sym32 = FALSE; |
| 13584 | break; |
| 13585 | |
| 13586 | /* When generating ELF code, we permit -KPIC and -call_shared to |
| 13587 | select SVR4_PIC, and -non_shared to select no PIC. This is |
| 13588 | intended to be compatible with Irix 5. */ |
| 13589 | case OPTION_CALL_SHARED: |
| 13590 | mips_pic = SVR4_PIC; |
| 13591 | mips_abicalls = TRUE; |
| 13592 | break; |
| 13593 | |
| 13594 | case OPTION_CALL_NONPIC: |
| 13595 | mips_pic = NO_PIC; |
| 13596 | mips_abicalls = TRUE; |
| 13597 | break; |
| 13598 | |
| 13599 | case OPTION_NON_SHARED: |
| 13600 | mips_pic = NO_PIC; |
| 13601 | mips_abicalls = FALSE; |
| 13602 | break; |
| 13603 | |
| 13604 | /* The -xgot option tells the assembler to use 32 bit offsets |
| 13605 | when accessing the got in SVR4_PIC mode. It is for Irix |
| 13606 | compatibility. */ |
| 13607 | case OPTION_XGOT: |
| 13608 | mips_big_got = 1; |
| 13609 | break; |
| 13610 | |
| 13611 | case 'G': |
| 13612 | g_switch_value = atoi (arg); |
| 13613 | g_switch_seen = 1; |
| 13614 | break; |
| 13615 | |
| 13616 | /* The -32, -n32 and -64 options are shortcuts for -mabi=32, -mabi=n32 |
| 13617 | and -mabi=64. */ |
| 13618 | case OPTION_32: |
| 13619 | mips_abi = O32_ABI; |
| 13620 | break; |
| 13621 | |
| 13622 | case OPTION_N32: |
| 13623 | mips_abi = N32_ABI; |
| 13624 | break; |
| 13625 | |
| 13626 | case OPTION_64: |
| 13627 | mips_abi = N64_ABI; |
| 13628 | if (!support_64bit_objects()) |
| 13629 | as_fatal (_("no compiled in support for 64 bit object file format")); |
| 13630 | break; |
| 13631 | |
| 13632 | case OPTION_GP32: |
| 13633 | file_mips_gp32 = 1; |
| 13634 | break; |
| 13635 | |
| 13636 | case OPTION_GP64: |
| 13637 | file_mips_gp32 = 0; |
| 13638 | break; |
| 13639 | |
| 13640 | case OPTION_FP32: |
| 13641 | file_mips_fp32 = 1; |
| 13642 | break; |
| 13643 | |
| 13644 | case OPTION_FP64: |
| 13645 | file_mips_fp32 = 0; |
| 13646 | break; |
| 13647 | |
| 13648 | case OPTION_SINGLE_FLOAT: |
| 13649 | file_mips_single_float = 1; |
| 13650 | break; |
| 13651 | |
| 13652 | case OPTION_DOUBLE_FLOAT: |
| 13653 | file_mips_single_float = 0; |
| 13654 | break; |
| 13655 | |
| 13656 | case OPTION_SOFT_FLOAT: |
| 13657 | file_mips_soft_float = 1; |
| 13658 | break; |
| 13659 | |
| 13660 | case OPTION_HARD_FLOAT: |
| 13661 | file_mips_soft_float = 0; |
| 13662 | break; |
| 13663 | |
| 13664 | case OPTION_MABI: |
| 13665 | if (strcmp (arg, "32") == 0) |
| 13666 | mips_abi = O32_ABI; |
| 13667 | else if (strcmp (arg, "o64") == 0) |
| 13668 | mips_abi = O64_ABI; |
| 13669 | else if (strcmp (arg, "n32") == 0) |
| 13670 | mips_abi = N32_ABI; |
| 13671 | else if (strcmp (arg, "64") == 0) |
| 13672 | { |
| 13673 | mips_abi = N64_ABI; |
| 13674 | if (! support_64bit_objects()) |
| 13675 | as_fatal (_("no compiled in support for 64 bit object file " |
| 13676 | "format")); |
| 13677 | } |
| 13678 | else if (strcmp (arg, "eabi") == 0) |
| 13679 | mips_abi = EABI_ABI; |
| 13680 | else |
| 13681 | { |
| 13682 | as_fatal (_("invalid abi -mabi=%s"), arg); |
| 13683 | return 0; |
| 13684 | } |
| 13685 | break; |
| 13686 | |
| 13687 | case OPTION_M7000_HILO_FIX: |
| 13688 | mips_7000_hilo_fix = TRUE; |
| 13689 | break; |
| 13690 | |
| 13691 | case OPTION_MNO_7000_HILO_FIX: |
| 13692 | mips_7000_hilo_fix = FALSE; |
| 13693 | break; |
| 13694 | |
| 13695 | case OPTION_MDEBUG: |
| 13696 | mips_flag_mdebug = TRUE; |
| 13697 | break; |
| 13698 | |
| 13699 | case OPTION_NO_MDEBUG: |
| 13700 | mips_flag_mdebug = FALSE; |
| 13701 | break; |
| 13702 | |
| 13703 | case OPTION_PDR: |
| 13704 | mips_flag_pdr = TRUE; |
| 13705 | break; |
| 13706 | |
| 13707 | case OPTION_NO_PDR: |
| 13708 | mips_flag_pdr = FALSE; |
| 13709 | break; |
| 13710 | |
| 13711 | case OPTION_MVXWORKS_PIC: |
| 13712 | mips_pic = VXWORKS_PIC; |
| 13713 | break; |
| 13714 | |
| 13715 | case OPTION_NAN: |
| 13716 | if (strcmp (arg, "2008") == 0) |
| 13717 | mips_flag_nan2008 = TRUE; |
| 13718 | else if (strcmp (arg, "legacy") == 0) |
| 13719 | mips_flag_nan2008 = FALSE; |
| 13720 | else |
| 13721 | { |
| 13722 | as_fatal (_("invalid NaN setting -mnan=%s"), arg); |
| 13723 | return 0; |
| 13724 | } |
| 13725 | break; |
| 13726 | |
| 13727 | default: |
| 13728 | return 0; |
| 13729 | } |
| 13730 | |
| 13731 | mips_fix_loongson2f = mips_fix_loongson2f_nop || mips_fix_loongson2f_jump; |
| 13732 | |
| 13733 | return 1; |
| 13734 | } |
| 13735 | \f |
| 13736 | /* Set up globals to generate code for the ISA or processor |
| 13737 | described by INFO. */ |
| 13738 | |
| 13739 | static void |
| 13740 | mips_set_architecture (const struct mips_cpu_info *info) |
| 13741 | { |
| 13742 | if (info != 0) |
| 13743 | { |
| 13744 | file_mips_arch = info->cpu; |
| 13745 | mips_opts.arch = info->cpu; |
| 13746 | mips_opts.isa = info->isa; |
| 13747 | } |
| 13748 | } |
| 13749 | |
| 13750 | |
| 13751 | /* Likewise for tuning. */ |
| 13752 | |
| 13753 | static void |
| 13754 | mips_set_tune (const struct mips_cpu_info *info) |
| 13755 | { |
| 13756 | if (info != 0) |
| 13757 | mips_tune = info->cpu; |
| 13758 | } |
| 13759 | |
| 13760 | |
| 13761 | void |
| 13762 | mips_after_parse_args (void) |
| 13763 | { |
| 13764 | const struct mips_cpu_info *arch_info = 0; |
| 13765 | const struct mips_cpu_info *tune_info = 0; |
| 13766 | |
| 13767 | /* GP relative stuff not working for PE */ |
| 13768 | if (strncmp (TARGET_OS, "pe", 2) == 0) |
| 13769 | { |
| 13770 | if (g_switch_seen && g_switch_value != 0) |
| 13771 | as_bad (_("-G not supported in this configuration")); |
| 13772 | g_switch_value = 0; |
| 13773 | } |
| 13774 | |
| 13775 | if (mips_abi == NO_ABI) |
| 13776 | mips_abi = MIPS_DEFAULT_ABI; |
| 13777 | |
| 13778 | /* The following code determines the architecture and register size. |
| 13779 | Similar code was added to GCC 3.3 (see override_options() in |
| 13780 | config/mips/mips.c). The GAS and GCC code should be kept in sync |
| 13781 | as much as possible. */ |
| 13782 | |
| 13783 | if (mips_arch_string != 0) |
| 13784 | arch_info = mips_parse_cpu ("-march", mips_arch_string); |
| 13785 | |
| 13786 | if (file_mips_isa != ISA_UNKNOWN) |
| 13787 | { |
| 13788 | /* Handle -mipsN. At this point, file_mips_isa contains the |
| 13789 | ISA level specified by -mipsN, while arch_info->isa contains |
| 13790 | the -march selection (if any). */ |
| 13791 | if (arch_info != 0) |
| 13792 | { |
| 13793 | /* -march takes precedence over -mipsN, since it is more descriptive. |
| 13794 | There's no harm in specifying both as long as the ISA levels |
| 13795 | are the same. */ |
| 13796 | if (file_mips_isa != arch_info->isa) |
| 13797 | as_bad (_("-%s conflicts with the other architecture options," |
| 13798 | " which imply -%s"), |
| 13799 | mips_cpu_info_from_isa (file_mips_isa)->name, |
| 13800 | mips_cpu_info_from_isa (arch_info->isa)->name); |
| 13801 | } |
| 13802 | else |
| 13803 | arch_info = mips_cpu_info_from_isa (file_mips_isa); |
| 13804 | } |
| 13805 | |
| 13806 | if (arch_info == 0) |
| 13807 | { |
| 13808 | arch_info = mips_parse_cpu ("default CPU", MIPS_CPU_STRING_DEFAULT); |
| 13809 | gas_assert (arch_info); |
| 13810 | } |
| 13811 | |
| 13812 | if (ABI_NEEDS_64BIT_REGS (mips_abi) && !ISA_HAS_64BIT_REGS (arch_info->isa)) |
| 13813 | as_bad (_("-march=%s is not compatible with the selected ABI"), |
| 13814 | arch_info->name); |
| 13815 | |
| 13816 | mips_set_architecture (arch_info); |
| 13817 | |
| 13818 | /* Optimize for file_mips_arch, unless -mtune selects a different processor. */ |
| 13819 | if (mips_tune_string != 0) |
| 13820 | tune_info = mips_parse_cpu ("-mtune", mips_tune_string); |
| 13821 | |
| 13822 | if (tune_info == 0) |
| 13823 | mips_set_tune (arch_info); |
| 13824 | else |
| 13825 | mips_set_tune (tune_info); |
| 13826 | |
| 13827 | if (file_mips_gp32 >= 0) |
| 13828 | { |
| 13829 | /* The user specified the size of the integer registers. Make sure |
| 13830 | it agrees with the ABI and ISA. */ |
| 13831 | if (file_mips_gp32 == 0 && !ISA_HAS_64BIT_REGS (mips_opts.isa)) |
| 13832 | as_bad (_("-mgp64 used with a 32-bit processor")); |
| 13833 | else if (file_mips_gp32 == 1 && ABI_NEEDS_64BIT_REGS (mips_abi)) |
| 13834 | as_bad (_("-mgp32 used with a 64-bit ABI")); |
| 13835 | else if (file_mips_gp32 == 0 && ABI_NEEDS_32BIT_REGS (mips_abi)) |
| 13836 | as_bad (_("-mgp64 used with a 32-bit ABI")); |
| 13837 | } |
| 13838 | else |
| 13839 | { |
| 13840 | /* Infer the integer register size from the ABI and processor. |
| 13841 | Restrict ourselves to 32-bit registers if that's all the |
| 13842 | processor has, or if the ABI cannot handle 64-bit registers. */ |
| 13843 | file_mips_gp32 = (ABI_NEEDS_32BIT_REGS (mips_abi) |
| 13844 | || !ISA_HAS_64BIT_REGS (mips_opts.isa)); |
| 13845 | } |
| 13846 | |
| 13847 | switch (file_mips_fp32) |
| 13848 | { |
| 13849 | default: |
| 13850 | case -1: |
| 13851 | /* No user specified float register size. |
| 13852 | ??? GAS treats single-float processors as though they had 64-bit |
| 13853 | float registers (although it complains when double-precision |
| 13854 | instructions are used). As things stand, saying they have 32-bit |
| 13855 | registers would lead to spurious "register must be even" messages. |
| 13856 | So here we assume float registers are never smaller than the |
| 13857 | integer ones. */ |
| 13858 | if (file_mips_gp32 == 0) |
| 13859 | /* 64-bit integer registers implies 64-bit float registers. */ |
| 13860 | file_mips_fp32 = 0; |
| 13861 | else if ((mips_opts.ase & FP64_ASES) |
| 13862 | && ISA_HAS_64BIT_FPRS (mips_opts.isa)) |
| 13863 | /* -mips3d and -mdmx imply 64-bit float registers, if possible. */ |
| 13864 | file_mips_fp32 = 0; |
| 13865 | else |
| 13866 | /* 32-bit float registers. */ |
| 13867 | file_mips_fp32 = 1; |
| 13868 | break; |
| 13869 | |
| 13870 | /* The user specified the size of the float registers. Check if it |
| 13871 | agrees with the ABI and ISA. */ |
| 13872 | case 0: |
| 13873 | if (!ISA_HAS_64BIT_FPRS (mips_opts.isa)) |
| 13874 | as_bad (_("-mfp64 used with a 32-bit fpu")); |
| 13875 | else if (ABI_NEEDS_32BIT_REGS (mips_abi) |
| 13876 | && !ISA_HAS_MXHC1 (mips_opts.isa)) |
| 13877 | as_warn (_("-mfp64 used with a 32-bit ABI")); |
| 13878 | break; |
| 13879 | case 1: |
| 13880 | if (ABI_NEEDS_64BIT_REGS (mips_abi)) |
| 13881 | as_warn (_("-mfp32 used with a 64-bit ABI")); |
| 13882 | break; |
| 13883 | } |
| 13884 | |
| 13885 | /* End of GCC-shared inference code. */ |
| 13886 | |
| 13887 | /* This flag is set when we have a 64-bit capable CPU but use only |
| 13888 | 32-bit wide registers. Note that EABI does not use it. */ |
| 13889 | if (ISA_HAS_64BIT_REGS (mips_opts.isa) |
| 13890 | && ((mips_abi == NO_ABI && file_mips_gp32 == 1) |
| 13891 | || mips_abi == O32_ABI)) |
| 13892 | mips_32bitmode = 1; |
| 13893 | |
| 13894 | if (mips_opts.isa == ISA_MIPS1 && mips_trap) |
| 13895 | as_bad (_("trap exception not supported at ISA 1")); |
| 13896 | |
| 13897 | /* If the selected architecture includes support for ASEs, enable |
| 13898 | generation of code for them. */ |
| 13899 | if (mips_opts.mips16 == -1) |
| 13900 | mips_opts.mips16 = (CPU_HAS_MIPS16 (file_mips_arch)) ? 1 : 0; |
| 13901 | if (mips_opts.micromips == -1) |
| 13902 | mips_opts.micromips = (CPU_HAS_MICROMIPS (file_mips_arch)) ? 1 : 0; |
| 13903 | |
| 13904 | /* MIPS3D and MDMX require 64-bit FPRs, so -mfp32 should stop those |
| 13905 | ASEs from being selected implicitly. */ |
| 13906 | if (file_mips_fp32 == 1) |
| 13907 | file_ase_explicit |= ASE_MIPS3D | ASE_MDMX; |
| 13908 | |
| 13909 | /* If the user didn't explicitly select or deselect a particular ASE, |
| 13910 | use the default setting for the CPU. */ |
| 13911 | mips_opts.ase |= (arch_info->ase & ~file_ase_explicit); |
| 13912 | |
| 13913 | file_mips_isa = mips_opts.isa; |
| 13914 | file_ase = mips_opts.ase; |
| 13915 | mips_opts.gp32 = file_mips_gp32; |
| 13916 | mips_opts.fp32 = file_mips_fp32; |
| 13917 | mips_opts.soft_float = file_mips_soft_float; |
| 13918 | mips_opts.single_float = file_mips_single_float; |
| 13919 | |
| 13920 | mips_check_isa_supports_ases (); |
| 13921 | |
| 13922 | if (mips_flag_mdebug < 0) |
| 13923 | mips_flag_mdebug = 0; |
| 13924 | } |
| 13925 | \f |
| 13926 | void |
| 13927 | mips_init_after_args (void) |
| 13928 | { |
| 13929 | /* initialize opcodes */ |
| 13930 | bfd_mips_num_opcodes = bfd_mips_num_builtin_opcodes; |
| 13931 | mips_opcodes = (struct mips_opcode *) mips_builtin_opcodes; |
| 13932 | } |
| 13933 | |
| 13934 | long |
| 13935 | md_pcrel_from (fixS *fixP) |
| 13936 | { |
| 13937 | valueT addr = fixP->fx_where + fixP->fx_frag->fr_address; |
| 13938 | switch (fixP->fx_r_type) |
| 13939 | { |
| 13940 | case BFD_RELOC_MICROMIPS_7_PCREL_S1: |
| 13941 | case BFD_RELOC_MICROMIPS_10_PCREL_S1: |
| 13942 | /* Return the address of the delay slot. */ |
| 13943 | return addr + 2; |
| 13944 | |
| 13945 | case BFD_RELOC_MICROMIPS_16_PCREL_S1: |
| 13946 | case BFD_RELOC_MICROMIPS_JMP: |
| 13947 | case BFD_RELOC_16_PCREL_S2: |
| 13948 | case BFD_RELOC_MIPS_JMP: |
| 13949 | /* Return the address of the delay slot. */ |
| 13950 | return addr + 4; |
| 13951 | |
| 13952 | case BFD_RELOC_32_PCREL: |
| 13953 | return addr; |
| 13954 | |
| 13955 | default: |
| 13956 | /* We have no relocation type for PC relative MIPS16 instructions. */ |
| 13957 | if (fixP->fx_addsy && S_GET_SEGMENT (fixP->fx_addsy) != now_seg) |
| 13958 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 13959 | _("PC relative MIPS16 instruction references" |
| 13960 | " a different section")); |
| 13961 | return addr; |
| 13962 | } |
| 13963 | } |
| 13964 | |
| 13965 | /* This is called before the symbol table is processed. In order to |
| 13966 | work with gcc when using mips-tfile, we must keep all local labels. |
| 13967 | However, in other cases, we want to discard them. If we were |
| 13968 | called with -g, but we didn't see any debugging information, it may |
| 13969 | mean that gcc is smuggling debugging information through to |
| 13970 | mips-tfile, in which case we must generate all local labels. */ |
| 13971 | |
| 13972 | void |
| 13973 | mips_frob_file_before_adjust (void) |
| 13974 | { |
| 13975 | #ifndef NO_ECOFF_DEBUGGING |
| 13976 | if (ECOFF_DEBUGGING |
| 13977 | && mips_debug != 0 |
| 13978 | && ! ecoff_debugging_seen) |
| 13979 | flag_keep_locals = 1; |
| 13980 | #endif |
| 13981 | } |
| 13982 | |
| 13983 | /* Sort any unmatched HI16 and GOT16 relocs so that they immediately precede |
| 13984 | the corresponding LO16 reloc. This is called before md_apply_fix and |
| 13985 | tc_gen_reloc. Unmatched relocs can only be generated by use of explicit |
| 13986 | relocation operators. |
| 13987 | |
| 13988 | For our purposes, a %lo() expression matches a %got() or %hi() |
| 13989 | expression if: |
| 13990 | |
| 13991 | (a) it refers to the same symbol; and |
| 13992 | (b) the offset applied in the %lo() expression is no lower than |
| 13993 | the offset applied in the %got() or %hi(). |
| 13994 | |
| 13995 | (b) allows us to cope with code like: |
| 13996 | |
| 13997 | lui $4,%hi(foo) |
| 13998 | lh $4,%lo(foo+2)($4) |
| 13999 | |
| 14000 | ...which is legal on RELA targets, and has a well-defined behaviour |
| 14001 | if the user knows that adding 2 to "foo" will not induce a carry to |
| 14002 | the high 16 bits. |
| 14003 | |
| 14004 | When several %lo()s match a particular %got() or %hi(), we use the |
| 14005 | following rules to distinguish them: |
| 14006 | |
| 14007 | (1) %lo()s with smaller offsets are a better match than %lo()s with |
| 14008 | higher offsets. |
| 14009 | |
| 14010 | (2) %lo()s with no matching %got() or %hi() are better than those |
| 14011 | that already have a matching %got() or %hi(). |
| 14012 | |
| 14013 | (3) later %lo()s are better than earlier %lo()s. |
| 14014 | |
| 14015 | These rules are applied in order. |
| 14016 | |
| 14017 | (1) means, among other things, that %lo()s with identical offsets are |
| 14018 | chosen if they exist. |
| 14019 | |
| 14020 | (2) means that we won't associate several high-part relocations with |
| 14021 | the same low-part relocation unless there's no alternative. Having |
| 14022 | several high parts for the same low part is a GNU extension; this rule |
| 14023 | allows careful users to avoid it. |
| 14024 | |
| 14025 | (3) is purely cosmetic. mips_hi_fixup_list is is in reverse order, |
| 14026 | with the last high-part relocation being at the front of the list. |
| 14027 | It therefore makes sense to choose the last matching low-part |
| 14028 | relocation, all other things being equal. It's also easier |
| 14029 | to code that way. */ |
| 14030 | |
| 14031 | void |
| 14032 | mips_frob_file (void) |
| 14033 | { |
| 14034 | struct mips_hi_fixup *l; |
| 14035 | bfd_reloc_code_real_type looking_for_rtype = BFD_RELOC_UNUSED; |
| 14036 | |
| 14037 | for (l = mips_hi_fixup_list; l != NULL; l = l->next) |
| 14038 | { |
| 14039 | segment_info_type *seginfo; |
| 14040 | bfd_boolean matched_lo_p; |
| 14041 | fixS **hi_pos, **lo_pos, **pos; |
| 14042 | |
| 14043 | gas_assert (reloc_needs_lo_p (l->fixp->fx_r_type)); |
| 14044 | |
| 14045 | /* If a GOT16 relocation turns out to be against a global symbol, |
| 14046 | there isn't supposed to be a matching LO. Ignore %gots against |
| 14047 | constants; we'll report an error for those later. */ |
| 14048 | if (got16_reloc_p (l->fixp->fx_r_type) |
| 14049 | && !(l->fixp->fx_addsy |
| 14050 | && pic_need_relax (l->fixp->fx_addsy, l->seg))) |
| 14051 | continue; |
| 14052 | |
| 14053 | /* Check quickly whether the next fixup happens to be a matching %lo. */ |
| 14054 | if (fixup_has_matching_lo_p (l->fixp)) |
| 14055 | continue; |
| 14056 | |
| 14057 | seginfo = seg_info (l->seg); |
| 14058 | |
| 14059 | /* Set HI_POS to the position of this relocation in the chain. |
| 14060 | Set LO_POS to the position of the chosen low-part relocation. |
| 14061 | MATCHED_LO_P is true on entry to the loop if *POS is a low-part |
| 14062 | relocation that matches an immediately-preceding high-part |
| 14063 | relocation. */ |
| 14064 | hi_pos = NULL; |
| 14065 | lo_pos = NULL; |
| 14066 | matched_lo_p = FALSE; |
| 14067 | looking_for_rtype = matching_lo_reloc (l->fixp->fx_r_type); |
| 14068 | |
| 14069 | for (pos = &seginfo->fix_root; *pos != NULL; pos = &(*pos)->fx_next) |
| 14070 | { |
| 14071 | if (*pos == l->fixp) |
| 14072 | hi_pos = pos; |
| 14073 | |
| 14074 | if ((*pos)->fx_r_type == looking_for_rtype |
| 14075 | && symbol_same_p ((*pos)->fx_addsy, l->fixp->fx_addsy) |
| 14076 | && (*pos)->fx_offset >= l->fixp->fx_offset |
| 14077 | && (lo_pos == NULL |
| 14078 | || (*pos)->fx_offset < (*lo_pos)->fx_offset |
| 14079 | || (!matched_lo_p |
| 14080 | && (*pos)->fx_offset == (*lo_pos)->fx_offset))) |
| 14081 | lo_pos = pos; |
| 14082 | |
| 14083 | matched_lo_p = (reloc_needs_lo_p ((*pos)->fx_r_type) |
| 14084 | && fixup_has_matching_lo_p (*pos)); |
| 14085 | } |
| 14086 | |
| 14087 | /* If we found a match, remove the high-part relocation from its |
| 14088 | current position and insert it before the low-part relocation. |
| 14089 | Make the offsets match so that fixup_has_matching_lo_p() |
| 14090 | will return true. |
| 14091 | |
| 14092 | We don't warn about unmatched high-part relocations since some |
| 14093 | versions of gcc have been known to emit dead "lui ...%hi(...)" |
| 14094 | instructions. */ |
| 14095 | if (lo_pos != NULL) |
| 14096 | { |
| 14097 | l->fixp->fx_offset = (*lo_pos)->fx_offset; |
| 14098 | if (l->fixp->fx_next != *lo_pos) |
| 14099 | { |
| 14100 | *hi_pos = l->fixp->fx_next; |
| 14101 | l->fixp->fx_next = *lo_pos; |
| 14102 | *lo_pos = l->fixp; |
| 14103 | } |
| 14104 | } |
| 14105 | } |
| 14106 | } |
| 14107 | |
| 14108 | int |
| 14109 | mips_force_relocation (fixS *fixp) |
| 14110 | { |
| 14111 | if (generic_force_reloc (fixp)) |
| 14112 | return 1; |
| 14113 | |
| 14114 | /* We want to keep BFD_RELOC_MICROMIPS_*_PCREL_S1 relocation, |
| 14115 | so that the linker relaxation can update targets. */ |
| 14116 | if (fixp->fx_r_type == BFD_RELOC_MICROMIPS_7_PCREL_S1 |
| 14117 | || fixp->fx_r_type == BFD_RELOC_MICROMIPS_10_PCREL_S1 |
| 14118 | || fixp->fx_r_type == BFD_RELOC_MICROMIPS_16_PCREL_S1) |
| 14119 | return 1; |
| 14120 | |
| 14121 | return 0; |
| 14122 | } |
| 14123 | |
| 14124 | /* Read the instruction associated with RELOC from BUF. */ |
| 14125 | |
| 14126 | static unsigned int |
| 14127 | read_reloc_insn (char *buf, bfd_reloc_code_real_type reloc) |
| 14128 | { |
| 14129 | if (mips16_reloc_p (reloc) || micromips_reloc_p (reloc)) |
| 14130 | return read_compressed_insn (buf, 4); |
| 14131 | else |
| 14132 | return read_insn (buf); |
| 14133 | } |
| 14134 | |
| 14135 | /* Write instruction INSN to BUF, given that it has been relocated |
| 14136 | by RELOC. */ |
| 14137 | |
| 14138 | static void |
| 14139 | write_reloc_insn (char *buf, bfd_reloc_code_real_type reloc, |
| 14140 | unsigned long insn) |
| 14141 | { |
| 14142 | if (mips16_reloc_p (reloc) || micromips_reloc_p (reloc)) |
| 14143 | write_compressed_insn (buf, insn, 4); |
| 14144 | else |
| 14145 | write_insn (buf, insn); |
| 14146 | } |
| 14147 | |
| 14148 | /* Apply a fixup to the object file. */ |
| 14149 | |
| 14150 | void |
| 14151 | md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED) |
| 14152 | { |
| 14153 | char *buf; |
| 14154 | unsigned long insn; |
| 14155 | reloc_howto_type *howto; |
| 14156 | |
| 14157 | /* We ignore generic BFD relocations we don't know about. */ |
| 14158 | howto = bfd_reloc_type_lookup (stdoutput, fixP->fx_r_type); |
| 14159 | if (! howto) |
| 14160 | return; |
| 14161 | |
| 14162 | gas_assert (fixP->fx_size == 2 |
| 14163 | || fixP->fx_size == 4 |
| 14164 | || fixP->fx_r_type == BFD_RELOC_16 |
| 14165 | || fixP->fx_r_type == BFD_RELOC_64 |
| 14166 | || fixP->fx_r_type == BFD_RELOC_CTOR |
| 14167 | || fixP->fx_r_type == BFD_RELOC_MIPS_SUB |
| 14168 | || fixP->fx_r_type == BFD_RELOC_MICROMIPS_SUB |
| 14169 | || fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT |
| 14170 | || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY |
| 14171 | || fixP->fx_r_type == BFD_RELOC_MIPS_TLS_DTPREL64); |
| 14172 | |
| 14173 | buf = fixP->fx_frag->fr_literal + fixP->fx_where; |
| 14174 | |
| 14175 | gas_assert (!fixP->fx_pcrel || fixP->fx_r_type == BFD_RELOC_16_PCREL_S2 |
| 14176 | || fixP->fx_r_type == BFD_RELOC_MICROMIPS_7_PCREL_S1 |
| 14177 | || fixP->fx_r_type == BFD_RELOC_MICROMIPS_10_PCREL_S1 |
| 14178 | || fixP->fx_r_type == BFD_RELOC_MICROMIPS_16_PCREL_S1 |
| 14179 | || fixP->fx_r_type == BFD_RELOC_32_PCREL); |
| 14180 | |
| 14181 | /* Don't treat parts of a composite relocation as done. There are two |
| 14182 | reasons for this: |
| 14183 | |
| 14184 | (1) The second and third parts will be against 0 (RSS_UNDEF) but |
| 14185 | should nevertheless be emitted if the first part is. |
| 14186 | |
| 14187 | (2) In normal usage, composite relocations are never assembly-time |
| 14188 | constants. The easiest way of dealing with the pathological |
| 14189 | exceptions is to generate a relocation against STN_UNDEF and |
| 14190 | leave everything up to the linker. */ |
| 14191 | if (fixP->fx_addsy == NULL && !fixP->fx_pcrel && fixP->fx_tcbit == 0) |
| 14192 | fixP->fx_done = 1; |
| 14193 | |
| 14194 | switch (fixP->fx_r_type) |
| 14195 | { |
| 14196 | case BFD_RELOC_MIPS_TLS_GD: |
| 14197 | case BFD_RELOC_MIPS_TLS_LDM: |
| 14198 | case BFD_RELOC_MIPS_TLS_DTPREL32: |
| 14199 | case BFD_RELOC_MIPS_TLS_DTPREL64: |
| 14200 | case BFD_RELOC_MIPS_TLS_DTPREL_HI16: |
| 14201 | case BFD_RELOC_MIPS_TLS_DTPREL_LO16: |
| 14202 | case BFD_RELOC_MIPS_TLS_GOTTPREL: |
| 14203 | case BFD_RELOC_MIPS_TLS_TPREL32: |
| 14204 | case BFD_RELOC_MIPS_TLS_TPREL64: |
| 14205 | case BFD_RELOC_MIPS_TLS_TPREL_HI16: |
| 14206 | case BFD_RELOC_MIPS_TLS_TPREL_LO16: |
| 14207 | case BFD_RELOC_MICROMIPS_TLS_GD: |
| 14208 | case BFD_RELOC_MICROMIPS_TLS_LDM: |
| 14209 | case BFD_RELOC_MICROMIPS_TLS_DTPREL_HI16: |
| 14210 | case BFD_RELOC_MICROMIPS_TLS_DTPREL_LO16: |
| 14211 | case BFD_RELOC_MICROMIPS_TLS_GOTTPREL: |
| 14212 | case BFD_RELOC_MICROMIPS_TLS_TPREL_HI16: |
| 14213 | case BFD_RELOC_MICROMIPS_TLS_TPREL_LO16: |
| 14214 | case BFD_RELOC_MIPS16_TLS_GD: |
| 14215 | case BFD_RELOC_MIPS16_TLS_LDM: |
| 14216 | case BFD_RELOC_MIPS16_TLS_DTPREL_HI16: |
| 14217 | case BFD_RELOC_MIPS16_TLS_DTPREL_LO16: |
| 14218 | case BFD_RELOC_MIPS16_TLS_GOTTPREL: |
| 14219 | case BFD_RELOC_MIPS16_TLS_TPREL_HI16: |
| 14220 | case BFD_RELOC_MIPS16_TLS_TPREL_LO16: |
| 14221 | if (!fixP->fx_addsy) |
| 14222 | { |
| 14223 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 14224 | _("TLS relocation against a constant")); |
| 14225 | break; |
| 14226 | } |
| 14227 | S_SET_THREAD_LOCAL (fixP->fx_addsy); |
| 14228 | /* fall through */ |
| 14229 | |
| 14230 | case BFD_RELOC_MIPS_JMP: |
| 14231 | case BFD_RELOC_MIPS_SHIFT5: |
| 14232 | case BFD_RELOC_MIPS_SHIFT6: |
| 14233 | case BFD_RELOC_MIPS_GOT_DISP: |
| 14234 | case BFD_RELOC_MIPS_GOT_PAGE: |
| 14235 | case BFD_RELOC_MIPS_GOT_OFST: |
| 14236 | case BFD_RELOC_MIPS_SUB: |
| 14237 | case BFD_RELOC_MIPS_INSERT_A: |
| 14238 | case BFD_RELOC_MIPS_INSERT_B: |
| 14239 | case BFD_RELOC_MIPS_DELETE: |
| 14240 | case BFD_RELOC_MIPS_HIGHEST: |
| 14241 | case BFD_RELOC_MIPS_HIGHER: |
| 14242 | case BFD_RELOC_MIPS_SCN_DISP: |
| 14243 | case BFD_RELOC_MIPS_REL16: |
| 14244 | case BFD_RELOC_MIPS_RELGOT: |
| 14245 | case BFD_RELOC_MIPS_JALR: |
| 14246 | case BFD_RELOC_HI16: |
| 14247 | case BFD_RELOC_HI16_S: |
| 14248 | case BFD_RELOC_LO16: |
| 14249 | case BFD_RELOC_GPREL16: |
| 14250 | case BFD_RELOC_MIPS_LITERAL: |
| 14251 | case BFD_RELOC_MIPS_CALL16: |
| 14252 | case BFD_RELOC_MIPS_GOT16: |
| 14253 | case BFD_RELOC_GPREL32: |
| 14254 | case BFD_RELOC_MIPS_GOT_HI16: |
| 14255 | case BFD_RELOC_MIPS_GOT_LO16: |
| 14256 | case BFD_RELOC_MIPS_CALL_HI16: |
| 14257 | case BFD_RELOC_MIPS_CALL_LO16: |
| 14258 | case BFD_RELOC_MIPS16_GPREL: |
| 14259 | case BFD_RELOC_MIPS16_GOT16: |
| 14260 | case BFD_RELOC_MIPS16_CALL16: |
| 14261 | case BFD_RELOC_MIPS16_HI16: |
| 14262 | case BFD_RELOC_MIPS16_HI16_S: |
| 14263 | case BFD_RELOC_MIPS16_LO16: |
| 14264 | case BFD_RELOC_MIPS16_JMP: |
| 14265 | case BFD_RELOC_MICROMIPS_JMP: |
| 14266 | case BFD_RELOC_MICROMIPS_GOT_DISP: |
| 14267 | case BFD_RELOC_MICROMIPS_GOT_PAGE: |
| 14268 | case BFD_RELOC_MICROMIPS_GOT_OFST: |
| 14269 | case BFD_RELOC_MICROMIPS_SUB: |
| 14270 | case BFD_RELOC_MICROMIPS_HIGHEST: |
| 14271 | case BFD_RELOC_MICROMIPS_HIGHER: |
| 14272 | case BFD_RELOC_MICROMIPS_SCN_DISP: |
| 14273 | case BFD_RELOC_MICROMIPS_JALR: |
| 14274 | case BFD_RELOC_MICROMIPS_HI16: |
| 14275 | case BFD_RELOC_MICROMIPS_HI16_S: |
| 14276 | case BFD_RELOC_MICROMIPS_LO16: |
| 14277 | case BFD_RELOC_MICROMIPS_GPREL16: |
| 14278 | case BFD_RELOC_MICROMIPS_LITERAL: |
| 14279 | case BFD_RELOC_MICROMIPS_CALL16: |
| 14280 | case BFD_RELOC_MICROMIPS_GOT16: |
| 14281 | case BFD_RELOC_MICROMIPS_GOT_HI16: |
| 14282 | case BFD_RELOC_MICROMIPS_GOT_LO16: |
| 14283 | case BFD_RELOC_MICROMIPS_CALL_HI16: |
| 14284 | case BFD_RELOC_MICROMIPS_CALL_LO16: |
| 14285 | case BFD_RELOC_MIPS_EH: |
| 14286 | if (fixP->fx_done) |
| 14287 | { |
| 14288 | offsetT value; |
| 14289 | |
| 14290 | if (calculate_reloc (fixP->fx_r_type, *valP, &value)) |
| 14291 | { |
| 14292 | insn = read_reloc_insn (buf, fixP->fx_r_type); |
| 14293 | if (mips16_reloc_p (fixP->fx_r_type)) |
| 14294 | insn |= mips16_immed_extend (value, 16); |
| 14295 | else |
| 14296 | insn |= (value & 0xffff); |
| 14297 | write_reloc_insn (buf, fixP->fx_r_type, insn); |
| 14298 | } |
| 14299 | else |
| 14300 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 14301 | _("unsupported constant in relocation")); |
| 14302 | } |
| 14303 | break; |
| 14304 | |
| 14305 | case BFD_RELOC_64: |
| 14306 | /* This is handled like BFD_RELOC_32, but we output a sign |
| 14307 | extended value if we are only 32 bits. */ |
| 14308 | if (fixP->fx_done) |
| 14309 | { |
| 14310 | if (8 <= sizeof (valueT)) |
| 14311 | md_number_to_chars (buf, *valP, 8); |
| 14312 | else |
| 14313 | { |
| 14314 | valueT hiv; |
| 14315 | |
| 14316 | if ((*valP & 0x80000000) != 0) |
| 14317 | hiv = 0xffffffff; |
| 14318 | else |
| 14319 | hiv = 0; |
| 14320 | md_number_to_chars (buf + (target_big_endian ? 4 : 0), *valP, 4); |
| 14321 | md_number_to_chars (buf + (target_big_endian ? 0 : 4), hiv, 4); |
| 14322 | } |
| 14323 | } |
| 14324 | break; |
| 14325 | |
| 14326 | case BFD_RELOC_RVA: |
| 14327 | case BFD_RELOC_32: |
| 14328 | case BFD_RELOC_32_PCREL: |
| 14329 | case BFD_RELOC_16: |
| 14330 | /* If we are deleting this reloc entry, we must fill in the |
| 14331 | value now. This can happen if we have a .word which is not |
| 14332 | resolved when it appears but is later defined. */ |
| 14333 | if (fixP->fx_done) |
| 14334 | md_number_to_chars (buf, *valP, fixP->fx_size); |
| 14335 | break; |
| 14336 | |
| 14337 | case BFD_RELOC_16_PCREL_S2: |
| 14338 | if ((*valP & 0x3) != 0) |
| 14339 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 14340 | _("branch to misaligned address (%lx)"), (long) *valP); |
| 14341 | |
| 14342 | /* We need to save the bits in the instruction since fixup_segment() |
| 14343 | might be deleting the relocation entry (i.e., a branch within |
| 14344 | the current segment). */ |
| 14345 | if (! fixP->fx_done) |
| 14346 | break; |
| 14347 | |
| 14348 | /* Update old instruction data. */ |
| 14349 | insn = read_insn (buf); |
| 14350 | |
| 14351 | if (*valP + 0x20000 <= 0x3ffff) |
| 14352 | { |
| 14353 | insn |= (*valP >> 2) & 0xffff; |
| 14354 | write_insn (buf, insn); |
| 14355 | } |
| 14356 | else if (mips_pic == NO_PIC |
| 14357 | && fixP->fx_done |
| 14358 | && fixP->fx_frag->fr_address >= text_section->vma |
| 14359 | && (fixP->fx_frag->fr_address |
| 14360 | < text_section->vma + bfd_get_section_size (text_section)) |
| 14361 | && ((insn & 0xffff0000) == 0x10000000 /* beq $0,$0 */ |
| 14362 | || (insn & 0xffff0000) == 0x04010000 /* bgez $0 */ |
| 14363 | || (insn & 0xffff0000) == 0x04110000)) /* bgezal $0 */ |
| 14364 | { |
| 14365 | /* The branch offset is too large. If this is an |
| 14366 | unconditional branch, and we are not generating PIC code, |
| 14367 | we can convert it to an absolute jump instruction. */ |
| 14368 | if ((insn & 0xffff0000) == 0x04110000) /* bgezal $0 */ |
| 14369 | insn = 0x0c000000; /* jal */ |
| 14370 | else |
| 14371 | insn = 0x08000000; /* j */ |
| 14372 | fixP->fx_r_type = BFD_RELOC_MIPS_JMP; |
| 14373 | fixP->fx_done = 0; |
| 14374 | fixP->fx_addsy = section_symbol (text_section); |
| 14375 | *valP += md_pcrel_from (fixP); |
| 14376 | write_insn (buf, insn); |
| 14377 | } |
| 14378 | else |
| 14379 | { |
| 14380 | /* If we got here, we have branch-relaxation disabled, |
| 14381 | and there's nothing we can do to fix this instruction |
| 14382 | without turning it into a longer sequence. */ |
| 14383 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 14384 | _("branch out of range")); |
| 14385 | } |
| 14386 | break; |
| 14387 | |
| 14388 | case BFD_RELOC_MICROMIPS_7_PCREL_S1: |
| 14389 | case BFD_RELOC_MICROMIPS_10_PCREL_S1: |
| 14390 | case BFD_RELOC_MICROMIPS_16_PCREL_S1: |
| 14391 | /* We adjust the offset back to even. */ |
| 14392 | if ((*valP & 0x1) != 0) |
| 14393 | --(*valP); |
| 14394 | |
| 14395 | if (! fixP->fx_done) |
| 14396 | break; |
| 14397 | |
| 14398 | /* Should never visit here, because we keep the relocation. */ |
| 14399 | abort (); |
| 14400 | break; |
| 14401 | |
| 14402 | case BFD_RELOC_VTABLE_INHERIT: |
| 14403 | fixP->fx_done = 0; |
| 14404 | if (fixP->fx_addsy |
| 14405 | && !S_IS_DEFINED (fixP->fx_addsy) |
| 14406 | && !S_IS_WEAK (fixP->fx_addsy)) |
| 14407 | S_SET_WEAK (fixP->fx_addsy); |
| 14408 | break; |
| 14409 | |
| 14410 | case BFD_RELOC_VTABLE_ENTRY: |
| 14411 | fixP->fx_done = 0; |
| 14412 | break; |
| 14413 | |
| 14414 | default: |
| 14415 | abort (); |
| 14416 | } |
| 14417 | |
| 14418 | /* Remember value for tc_gen_reloc. */ |
| 14419 | fixP->fx_addnumber = *valP; |
| 14420 | } |
| 14421 | |
| 14422 | static symbolS * |
| 14423 | get_symbol (void) |
| 14424 | { |
| 14425 | int c; |
| 14426 | char *name; |
| 14427 | symbolS *p; |
| 14428 | |
| 14429 | name = input_line_pointer; |
| 14430 | c = get_symbol_end (); |
| 14431 | p = (symbolS *) symbol_find_or_make (name); |
| 14432 | *input_line_pointer = c; |
| 14433 | return p; |
| 14434 | } |
| 14435 | |
| 14436 | /* Align the current frag to a given power of two. If a particular |
| 14437 | fill byte should be used, FILL points to an integer that contains |
| 14438 | that byte, otherwise FILL is null. |
| 14439 | |
| 14440 | This function used to have the comment: |
| 14441 | |
| 14442 | The MIPS assembler also automatically adjusts any preceding label. |
| 14443 | |
| 14444 | The implementation therefore applied the adjustment to a maximum of |
| 14445 | one label. However, other label adjustments are applied to batches |
| 14446 | of labels, and adjusting just one caused problems when new labels |
| 14447 | were added for the sake of debugging or unwind information. |
| 14448 | We therefore adjust all preceding labels (given as LABELS) instead. */ |
| 14449 | |
| 14450 | static void |
| 14451 | mips_align (int to, int *fill, struct insn_label_list *labels) |
| 14452 | { |
| 14453 | mips_emit_delays (); |
| 14454 | mips_record_compressed_mode (); |
| 14455 | if (fill == NULL && subseg_text_p (now_seg)) |
| 14456 | frag_align_code (to, 0); |
| 14457 | else |
| 14458 | frag_align (to, fill ? *fill : 0, 0); |
| 14459 | record_alignment (now_seg, to); |
| 14460 | mips_move_labels (labels, FALSE); |
| 14461 | } |
| 14462 | |
| 14463 | /* Align to a given power of two. .align 0 turns off the automatic |
| 14464 | alignment used by the data creating pseudo-ops. */ |
| 14465 | |
| 14466 | static void |
| 14467 | s_align (int x ATTRIBUTE_UNUSED) |
| 14468 | { |
| 14469 | int temp, fill_value, *fill_ptr; |
| 14470 | long max_alignment = 28; |
| 14471 | |
| 14472 | /* o Note that the assembler pulls down any immediately preceding label |
| 14473 | to the aligned address. |
| 14474 | o It's not documented but auto alignment is reinstated by |
| 14475 | a .align pseudo instruction. |
| 14476 | o Note also that after auto alignment is turned off the mips assembler |
| 14477 | issues an error on attempt to assemble an improperly aligned data item. |
| 14478 | We don't. */ |
| 14479 | |
| 14480 | temp = get_absolute_expression (); |
| 14481 | if (temp > max_alignment) |
| 14482 | as_bad (_("alignment too large, %d assumed"), temp = max_alignment); |
| 14483 | else if (temp < 0) |
| 14484 | { |
| 14485 | as_warn (_("alignment negative, 0 assumed")); |
| 14486 | temp = 0; |
| 14487 | } |
| 14488 | if (*input_line_pointer == ',') |
| 14489 | { |
| 14490 | ++input_line_pointer; |
| 14491 | fill_value = get_absolute_expression (); |
| 14492 | fill_ptr = &fill_value; |
| 14493 | } |
| 14494 | else |
| 14495 | fill_ptr = 0; |
| 14496 | if (temp) |
| 14497 | { |
| 14498 | segment_info_type *si = seg_info (now_seg); |
| 14499 | struct insn_label_list *l = si->label_list; |
| 14500 | /* Auto alignment should be switched on by next section change. */ |
| 14501 | auto_align = 1; |
| 14502 | mips_align (temp, fill_ptr, l); |
| 14503 | } |
| 14504 | else |
| 14505 | { |
| 14506 | auto_align = 0; |
| 14507 | } |
| 14508 | |
| 14509 | demand_empty_rest_of_line (); |
| 14510 | } |
| 14511 | |
| 14512 | static void |
| 14513 | s_change_sec (int sec) |
| 14514 | { |
| 14515 | segT seg; |
| 14516 | |
| 14517 | /* The ELF backend needs to know that we are changing sections, so |
| 14518 | that .previous works correctly. We could do something like check |
| 14519 | for an obj_section_change_hook macro, but that might be confusing |
| 14520 | as it would not be appropriate to use it in the section changing |
| 14521 | functions in read.c, since obj-elf.c intercepts those. FIXME: |
| 14522 | This should be cleaner, somehow. */ |
| 14523 | obj_elf_section_change_hook (); |
| 14524 | |
| 14525 | mips_emit_delays (); |
| 14526 | |
| 14527 | switch (sec) |
| 14528 | { |
| 14529 | case 't': |
| 14530 | s_text (0); |
| 14531 | break; |
| 14532 | case 'd': |
| 14533 | s_data (0); |
| 14534 | break; |
| 14535 | case 'b': |
| 14536 | subseg_set (bss_section, (subsegT) get_absolute_expression ()); |
| 14537 | demand_empty_rest_of_line (); |
| 14538 | break; |
| 14539 | |
| 14540 | case 'r': |
| 14541 | seg = subseg_new (RDATA_SECTION_NAME, |
| 14542 | (subsegT) get_absolute_expression ()); |
| 14543 | bfd_set_section_flags (stdoutput, seg, (SEC_ALLOC | SEC_LOAD |
| 14544 | | SEC_READONLY | SEC_RELOC |
| 14545 | | SEC_DATA)); |
| 14546 | if (strncmp (TARGET_OS, "elf", 3) != 0) |
| 14547 | record_alignment (seg, 4); |
| 14548 | demand_empty_rest_of_line (); |
| 14549 | break; |
| 14550 | |
| 14551 | case 's': |
| 14552 | seg = subseg_new (".sdata", (subsegT) get_absolute_expression ()); |
| 14553 | bfd_set_section_flags (stdoutput, seg, |
| 14554 | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_DATA); |
| 14555 | if (strncmp (TARGET_OS, "elf", 3) != 0) |
| 14556 | record_alignment (seg, 4); |
| 14557 | demand_empty_rest_of_line (); |
| 14558 | break; |
| 14559 | |
| 14560 | case 'B': |
| 14561 | seg = subseg_new (".sbss", (subsegT) get_absolute_expression ()); |
| 14562 | bfd_set_section_flags (stdoutput, seg, SEC_ALLOC); |
| 14563 | if (strncmp (TARGET_OS, "elf", 3) != 0) |
| 14564 | record_alignment (seg, 4); |
| 14565 | demand_empty_rest_of_line (); |
| 14566 | break; |
| 14567 | } |
| 14568 | |
| 14569 | auto_align = 1; |
| 14570 | } |
| 14571 | |
| 14572 | void |
| 14573 | s_change_section (int ignore ATTRIBUTE_UNUSED) |
| 14574 | { |
| 14575 | char *section_name; |
| 14576 | char c; |
| 14577 | char next_c = 0; |
| 14578 | int section_type; |
| 14579 | int section_flag; |
| 14580 | int section_entry_size; |
| 14581 | int section_alignment; |
| 14582 | |
| 14583 | section_name = input_line_pointer; |
| 14584 | c = get_symbol_end (); |
| 14585 | if (c) |
| 14586 | next_c = *(input_line_pointer + 1); |
| 14587 | |
| 14588 | /* Do we have .section Name<,"flags">? */ |
| 14589 | if (c != ',' || (c == ',' && next_c == '"')) |
| 14590 | { |
| 14591 | /* just after name is now '\0'. */ |
| 14592 | *input_line_pointer = c; |
| 14593 | input_line_pointer = section_name; |
| 14594 | obj_elf_section (ignore); |
| 14595 | return; |
| 14596 | } |
| 14597 | input_line_pointer++; |
| 14598 | |
| 14599 | /* Do we have .section Name<,type><,flag><,entry_size><,alignment> */ |
| 14600 | if (c == ',') |
| 14601 | section_type = get_absolute_expression (); |
| 14602 | else |
| 14603 | section_type = 0; |
| 14604 | if (*input_line_pointer++ == ',') |
| 14605 | section_flag = get_absolute_expression (); |
| 14606 | else |
| 14607 | section_flag = 0; |
| 14608 | if (*input_line_pointer++ == ',') |
| 14609 | section_entry_size = get_absolute_expression (); |
| 14610 | else |
| 14611 | section_entry_size = 0; |
| 14612 | if (*input_line_pointer++ == ',') |
| 14613 | section_alignment = get_absolute_expression (); |
| 14614 | else |
| 14615 | section_alignment = 0; |
| 14616 | /* FIXME: really ignore? */ |
| 14617 | (void) section_alignment; |
| 14618 | |
| 14619 | section_name = xstrdup (section_name); |
| 14620 | |
| 14621 | /* When using the generic form of .section (as implemented by obj-elf.c), |
| 14622 | there's no way to set the section type to SHT_MIPS_DWARF. Users have |
| 14623 | traditionally had to fall back on the more common @progbits instead. |
| 14624 | |
| 14625 | There's nothing really harmful in this, since bfd will correct |
| 14626 | SHT_PROGBITS to SHT_MIPS_DWARF before writing out the file. But it |
| 14627 | means that, for backwards compatibility, the special_section entries |
| 14628 | for dwarf sections must use SHT_PROGBITS rather than SHT_MIPS_DWARF. |
| 14629 | |
| 14630 | Even so, we shouldn't force users of the MIPS .section syntax to |
| 14631 | incorrectly label the sections as SHT_PROGBITS. The best compromise |
| 14632 | seems to be to map SHT_MIPS_DWARF to SHT_PROGBITS before calling the |
| 14633 | generic type-checking code. */ |
| 14634 | if (section_type == SHT_MIPS_DWARF) |
| 14635 | section_type = SHT_PROGBITS; |
| 14636 | |
| 14637 | obj_elf_change_section (section_name, section_type, section_flag, |
| 14638 | section_entry_size, 0, 0, 0); |
| 14639 | |
| 14640 | if (now_seg->name != section_name) |
| 14641 | free (section_name); |
| 14642 | } |
| 14643 | |
| 14644 | void |
| 14645 | mips_enable_auto_align (void) |
| 14646 | { |
| 14647 | auto_align = 1; |
| 14648 | } |
| 14649 | |
| 14650 | static void |
| 14651 | s_cons (int log_size) |
| 14652 | { |
| 14653 | segment_info_type *si = seg_info (now_seg); |
| 14654 | struct insn_label_list *l = si->label_list; |
| 14655 | |
| 14656 | mips_emit_delays (); |
| 14657 | if (log_size > 0 && auto_align) |
| 14658 | mips_align (log_size, 0, l); |
| 14659 | cons (1 << log_size); |
| 14660 | mips_clear_insn_labels (); |
| 14661 | } |
| 14662 | |
| 14663 | static void |
| 14664 | s_float_cons (int type) |
| 14665 | { |
| 14666 | segment_info_type *si = seg_info (now_seg); |
| 14667 | struct insn_label_list *l = si->label_list; |
| 14668 | |
| 14669 | mips_emit_delays (); |
| 14670 | |
| 14671 | if (auto_align) |
| 14672 | { |
| 14673 | if (type == 'd') |
| 14674 | mips_align (3, 0, l); |
| 14675 | else |
| 14676 | mips_align (2, 0, l); |
| 14677 | } |
| 14678 | |
| 14679 | float_cons (type); |
| 14680 | mips_clear_insn_labels (); |
| 14681 | } |
| 14682 | |
| 14683 | /* Handle .globl. We need to override it because on Irix 5 you are |
| 14684 | permitted to say |
| 14685 | .globl foo .text |
| 14686 | where foo is an undefined symbol, to mean that foo should be |
| 14687 | considered to be the address of a function. */ |
| 14688 | |
| 14689 | static void |
| 14690 | s_mips_globl (int x ATTRIBUTE_UNUSED) |
| 14691 | { |
| 14692 | char *name; |
| 14693 | int c; |
| 14694 | symbolS *symbolP; |
| 14695 | flagword flag; |
| 14696 | |
| 14697 | do |
| 14698 | { |
| 14699 | name = input_line_pointer; |
| 14700 | c = get_symbol_end (); |
| 14701 | symbolP = symbol_find_or_make (name); |
| 14702 | S_SET_EXTERNAL (symbolP); |
| 14703 | |
| 14704 | *input_line_pointer = c; |
| 14705 | SKIP_WHITESPACE (); |
| 14706 | |
| 14707 | /* On Irix 5, every global symbol that is not explicitly labelled as |
| 14708 | being a function is apparently labelled as being an object. */ |
| 14709 | flag = BSF_OBJECT; |
| 14710 | |
| 14711 | if (!is_end_of_line[(unsigned char) *input_line_pointer] |
| 14712 | && (*input_line_pointer != ',')) |
| 14713 | { |
| 14714 | char *secname; |
| 14715 | asection *sec; |
| 14716 | |
| 14717 | secname = input_line_pointer; |
| 14718 | c = get_symbol_end (); |
| 14719 | sec = bfd_get_section_by_name (stdoutput, secname); |
| 14720 | if (sec == NULL) |
| 14721 | as_bad (_("%s: no such section"), secname); |
| 14722 | *input_line_pointer = c; |
| 14723 | |
| 14724 | if (sec != NULL && (sec->flags & SEC_CODE) != 0) |
| 14725 | flag = BSF_FUNCTION; |
| 14726 | } |
| 14727 | |
| 14728 | symbol_get_bfdsym (symbolP)->flags |= flag; |
| 14729 | |
| 14730 | c = *input_line_pointer; |
| 14731 | if (c == ',') |
| 14732 | { |
| 14733 | input_line_pointer++; |
| 14734 | SKIP_WHITESPACE (); |
| 14735 | if (is_end_of_line[(unsigned char) *input_line_pointer]) |
| 14736 | c = '\n'; |
| 14737 | } |
| 14738 | } |
| 14739 | while (c == ','); |
| 14740 | |
| 14741 | demand_empty_rest_of_line (); |
| 14742 | } |
| 14743 | |
| 14744 | static void |
| 14745 | s_option (int x ATTRIBUTE_UNUSED) |
| 14746 | { |
| 14747 | char *opt; |
| 14748 | char c; |
| 14749 | |
| 14750 | opt = input_line_pointer; |
| 14751 | c = get_symbol_end (); |
| 14752 | |
| 14753 | if (*opt == 'O') |
| 14754 | { |
| 14755 | /* FIXME: What does this mean? */ |
| 14756 | } |
| 14757 | else if (strncmp (opt, "pic", 3) == 0) |
| 14758 | { |
| 14759 | int i; |
| 14760 | |
| 14761 | i = atoi (opt + 3); |
| 14762 | if (i == 0) |
| 14763 | mips_pic = NO_PIC; |
| 14764 | else if (i == 2) |
| 14765 | { |
| 14766 | mips_pic = SVR4_PIC; |
| 14767 | mips_abicalls = TRUE; |
| 14768 | } |
| 14769 | else |
| 14770 | as_bad (_(".option pic%d not supported"), i); |
| 14771 | |
| 14772 | if (mips_pic == SVR4_PIC) |
| 14773 | { |
| 14774 | if (g_switch_seen && g_switch_value != 0) |
| 14775 | as_warn (_("-G may not be used with SVR4 PIC code")); |
| 14776 | g_switch_value = 0; |
| 14777 | bfd_set_gp_size (stdoutput, 0); |
| 14778 | } |
| 14779 | } |
| 14780 | else |
| 14781 | as_warn (_("unrecognized option \"%s\""), opt); |
| 14782 | |
| 14783 | *input_line_pointer = c; |
| 14784 | demand_empty_rest_of_line (); |
| 14785 | } |
| 14786 | |
| 14787 | /* This structure is used to hold a stack of .set values. */ |
| 14788 | |
| 14789 | struct mips_option_stack |
| 14790 | { |
| 14791 | struct mips_option_stack *next; |
| 14792 | struct mips_set_options options; |
| 14793 | }; |
| 14794 | |
| 14795 | static struct mips_option_stack *mips_opts_stack; |
| 14796 | |
| 14797 | /* Handle the .set pseudo-op. */ |
| 14798 | |
| 14799 | static void |
| 14800 | s_mipsset (int x ATTRIBUTE_UNUSED) |
| 14801 | { |
| 14802 | char *name = input_line_pointer, ch; |
| 14803 | const struct mips_ase *ase; |
| 14804 | |
| 14805 | while (!is_end_of_line[(unsigned char) *input_line_pointer]) |
| 14806 | ++input_line_pointer; |
| 14807 | ch = *input_line_pointer; |
| 14808 | *input_line_pointer = '\0'; |
| 14809 | |
| 14810 | if (strcmp (name, "reorder") == 0) |
| 14811 | { |
| 14812 | if (mips_opts.noreorder) |
| 14813 | end_noreorder (); |
| 14814 | } |
| 14815 | else if (strcmp (name, "noreorder") == 0) |
| 14816 | { |
| 14817 | if (!mips_opts.noreorder) |
| 14818 | start_noreorder (); |
| 14819 | } |
| 14820 | else if (strncmp (name, "at=", 3) == 0) |
| 14821 | { |
| 14822 | char *s = name + 3; |
| 14823 | |
| 14824 | if (!reg_lookup (&s, RTYPE_NUM | RTYPE_GP, &mips_opts.at)) |
| 14825 | as_bad (_("unrecognized register name `%s'"), s); |
| 14826 | } |
| 14827 | else if (strcmp (name, "at") == 0) |
| 14828 | { |
| 14829 | mips_opts.at = ATREG; |
| 14830 | } |
| 14831 | else if (strcmp (name, "noat") == 0) |
| 14832 | { |
| 14833 | mips_opts.at = ZERO; |
| 14834 | } |
| 14835 | else if (strcmp (name, "macro") == 0) |
| 14836 | { |
| 14837 | mips_opts.warn_about_macros = 0; |
| 14838 | } |
| 14839 | else if (strcmp (name, "nomacro") == 0) |
| 14840 | { |
| 14841 | if (mips_opts.noreorder == 0) |
| 14842 | as_bad (_("`noreorder' must be set before `nomacro'")); |
| 14843 | mips_opts.warn_about_macros = 1; |
| 14844 | } |
| 14845 | else if (strcmp (name, "move") == 0 || strcmp (name, "novolatile") == 0) |
| 14846 | { |
| 14847 | mips_opts.nomove = 0; |
| 14848 | } |
| 14849 | else if (strcmp (name, "nomove") == 0 || strcmp (name, "volatile") == 0) |
| 14850 | { |
| 14851 | mips_opts.nomove = 1; |
| 14852 | } |
| 14853 | else if (strcmp (name, "bopt") == 0) |
| 14854 | { |
| 14855 | mips_opts.nobopt = 0; |
| 14856 | } |
| 14857 | else if (strcmp (name, "nobopt") == 0) |
| 14858 | { |
| 14859 | mips_opts.nobopt = 1; |
| 14860 | } |
| 14861 | else if (strcmp (name, "gp=default") == 0) |
| 14862 | mips_opts.gp32 = file_mips_gp32; |
| 14863 | else if (strcmp (name, "gp=32") == 0) |
| 14864 | mips_opts.gp32 = 1; |
| 14865 | else if (strcmp (name, "gp=64") == 0) |
| 14866 | { |
| 14867 | if (!ISA_HAS_64BIT_REGS (mips_opts.isa)) |
| 14868 | as_warn (_("%s isa does not support 64-bit registers"), |
| 14869 | mips_cpu_info_from_isa (mips_opts.isa)->name); |
| 14870 | mips_opts.gp32 = 0; |
| 14871 | } |
| 14872 | else if (strcmp (name, "fp=default") == 0) |
| 14873 | mips_opts.fp32 = file_mips_fp32; |
| 14874 | else if (strcmp (name, "fp=32") == 0) |
| 14875 | mips_opts.fp32 = 1; |
| 14876 | else if (strcmp (name, "fp=64") == 0) |
| 14877 | { |
| 14878 | if (!ISA_HAS_64BIT_FPRS (mips_opts.isa)) |
| 14879 | as_warn (_("%s isa does not support 64-bit floating point registers"), |
| 14880 | mips_cpu_info_from_isa (mips_opts.isa)->name); |
| 14881 | mips_opts.fp32 = 0; |
| 14882 | } |
| 14883 | else if (strcmp (name, "softfloat") == 0) |
| 14884 | mips_opts.soft_float = 1; |
| 14885 | else if (strcmp (name, "hardfloat") == 0) |
| 14886 | mips_opts.soft_float = 0; |
| 14887 | else if (strcmp (name, "singlefloat") == 0) |
| 14888 | mips_opts.single_float = 1; |
| 14889 | else if (strcmp (name, "doublefloat") == 0) |
| 14890 | mips_opts.single_float = 0; |
| 14891 | else if (strcmp (name, "mips16") == 0 |
| 14892 | || strcmp (name, "MIPS-16") == 0) |
| 14893 | { |
| 14894 | if (mips_opts.micromips == 1) |
| 14895 | as_fatal (_("`mips16' cannot be used with `micromips'")); |
| 14896 | mips_opts.mips16 = 1; |
| 14897 | } |
| 14898 | else if (strcmp (name, "nomips16") == 0 |
| 14899 | || strcmp (name, "noMIPS-16") == 0) |
| 14900 | mips_opts.mips16 = 0; |
| 14901 | else if (strcmp (name, "micromips") == 0) |
| 14902 | { |
| 14903 | if (mips_opts.mips16 == 1) |
| 14904 | as_fatal (_("`micromips' cannot be used with `mips16'")); |
| 14905 | mips_opts.micromips = 1; |
| 14906 | } |
| 14907 | else if (strcmp (name, "nomicromips") == 0) |
| 14908 | mips_opts.micromips = 0; |
| 14909 | else if (name[0] == 'n' |
| 14910 | && name[1] == 'o' |
| 14911 | && (ase = mips_lookup_ase (name + 2))) |
| 14912 | mips_set_ase (ase, FALSE); |
| 14913 | else if ((ase = mips_lookup_ase (name))) |
| 14914 | mips_set_ase (ase, TRUE); |
| 14915 | else if (strncmp (name, "mips", 4) == 0 || strncmp (name, "arch=", 5) == 0) |
| 14916 | { |
| 14917 | int reset = 0; |
| 14918 | |
| 14919 | /* Permit the user to change the ISA and architecture on the fly. |
| 14920 | Needless to say, misuse can cause serious problems. */ |
| 14921 | if (strcmp (name, "mips0") == 0 || strcmp (name, "arch=default") == 0) |
| 14922 | { |
| 14923 | reset = 1; |
| 14924 | mips_opts.isa = file_mips_isa; |
| 14925 | mips_opts.arch = file_mips_arch; |
| 14926 | } |
| 14927 | else if (strncmp (name, "arch=", 5) == 0) |
| 14928 | { |
| 14929 | const struct mips_cpu_info *p; |
| 14930 | |
| 14931 | p = mips_parse_cpu("internal use", name + 5); |
| 14932 | if (!p) |
| 14933 | as_bad (_("unknown architecture %s"), name + 5); |
| 14934 | else |
| 14935 | { |
| 14936 | mips_opts.arch = p->cpu; |
| 14937 | mips_opts.isa = p->isa; |
| 14938 | } |
| 14939 | } |
| 14940 | else if (strncmp (name, "mips", 4) == 0) |
| 14941 | { |
| 14942 | const struct mips_cpu_info *p; |
| 14943 | |
| 14944 | p = mips_parse_cpu("internal use", name); |
| 14945 | if (!p) |
| 14946 | as_bad (_("unknown ISA level %s"), name + 4); |
| 14947 | else |
| 14948 | { |
| 14949 | mips_opts.arch = p->cpu; |
| 14950 | mips_opts.isa = p->isa; |
| 14951 | } |
| 14952 | } |
| 14953 | else |
| 14954 | as_bad (_("unknown ISA or architecture %s"), name); |
| 14955 | |
| 14956 | switch (mips_opts.isa) |
| 14957 | { |
| 14958 | case 0: |
| 14959 | break; |
| 14960 | case ISA_MIPS1: |
| 14961 | case ISA_MIPS2: |
| 14962 | case ISA_MIPS32: |
| 14963 | case ISA_MIPS32R2: |
| 14964 | mips_opts.gp32 = 1; |
| 14965 | mips_opts.fp32 = 1; |
| 14966 | break; |
| 14967 | case ISA_MIPS3: |
| 14968 | case ISA_MIPS4: |
| 14969 | case ISA_MIPS5: |
| 14970 | case ISA_MIPS64: |
| 14971 | case ISA_MIPS64R2: |
| 14972 | mips_opts.gp32 = 0; |
| 14973 | if (mips_opts.arch == CPU_R5900) |
| 14974 | { |
| 14975 | mips_opts.fp32 = 1; |
| 14976 | } |
| 14977 | else |
| 14978 | { |
| 14979 | mips_opts.fp32 = 0; |
| 14980 | } |
| 14981 | break; |
| 14982 | default: |
| 14983 | as_bad (_("unknown ISA level %s"), name + 4); |
| 14984 | break; |
| 14985 | } |
| 14986 | if (reset) |
| 14987 | { |
| 14988 | mips_opts.gp32 = file_mips_gp32; |
| 14989 | mips_opts.fp32 = file_mips_fp32; |
| 14990 | } |
| 14991 | } |
| 14992 | else if (strcmp (name, "autoextend") == 0) |
| 14993 | mips_opts.noautoextend = 0; |
| 14994 | else if (strcmp (name, "noautoextend") == 0) |
| 14995 | mips_opts.noautoextend = 1; |
| 14996 | else if (strcmp (name, "insn32") == 0) |
| 14997 | mips_opts.insn32 = TRUE; |
| 14998 | else if (strcmp (name, "noinsn32") == 0) |
| 14999 | mips_opts.insn32 = FALSE; |
| 15000 | else if (strcmp (name, "push") == 0) |
| 15001 | { |
| 15002 | struct mips_option_stack *s; |
| 15003 | |
| 15004 | s = (struct mips_option_stack *) xmalloc (sizeof *s); |
| 15005 | s->next = mips_opts_stack; |
| 15006 | s->options = mips_opts; |
| 15007 | mips_opts_stack = s; |
| 15008 | } |
| 15009 | else if (strcmp (name, "pop") == 0) |
| 15010 | { |
| 15011 | struct mips_option_stack *s; |
| 15012 | |
| 15013 | s = mips_opts_stack; |
| 15014 | if (s == NULL) |
| 15015 | as_bad (_(".set pop with no .set push")); |
| 15016 | else |
| 15017 | { |
| 15018 | /* If we're changing the reorder mode we need to handle |
| 15019 | delay slots correctly. */ |
| 15020 | if (s->options.noreorder && ! mips_opts.noreorder) |
| 15021 | start_noreorder (); |
| 15022 | else if (! s->options.noreorder && mips_opts.noreorder) |
| 15023 | end_noreorder (); |
| 15024 | |
| 15025 | mips_opts = s->options; |
| 15026 | mips_opts_stack = s->next; |
| 15027 | free (s); |
| 15028 | } |
| 15029 | } |
| 15030 | else if (strcmp (name, "sym32") == 0) |
| 15031 | mips_opts.sym32 = TRUE; |
| 15032 | else if (strcmp (name, "nosym32") == 0) |
| 15033 | mips_opts.sym32 = FALSE; |
| 15034 | else if (strchr (name, ',')) |
| 15035 | { |
| 15036 | /* Generic ".set" directive; use the generic handler. */ |
| 15037 | *input_line_pointer = ch; |
| 15038 | input_line_pointer = name; |
| 15039 | s_set (0); |
| 15040 | return; |
| 15041 | } |
| 15042 | else |
| 15043 | { |
| 15044 | as_warn (_("tried to set unrecognized symbol: %s\n"), name); |
| 15045 | } |
| 15046 | mips_check_isa_supports_ases (); |
| 15047 | *input_line_pointer = ch; |
| 15048 | demand_empty_rest_of_line (); |
| 15049 | } |
| 15050 | |
| 15051 | /* Handle the .abicalls pseudo-op. I believe this is equivalent to |
| 15052 | .option pic2. It means to generate SVR4 PIC calls. */ |
| 15053 | |
| 15054 | static void |
| 15055 | s_abicalls (int ignore ATTRIBUTE_UNUSED) |
| 15056 | { |
| 15057 | mips_pic = SVR4_PIC; |
| 15058 | mips_abicalls = TRUE; |
| 15059 | |
| 15060 | if (g_switch_seen && g_switch_value != 0) |
| 15061 | as_warn (_("-G may not be used with SVR4 PIC code")); |
| 15062 | g_switch_value = 0; |
| 15063 | |
| 15064 | bfd_set_gp_size (stdoutput, 0); |
| 15065 | demand_empty_rest_of_line (); |
| 15066 | } |
| 15067 | |
| 15068 | /* Handle the .cpload pseudo-op. This is used when generating SVR4 |
| 15069 | PIC code. It sets the $gp register for the function based on the |
| 15070 | function address, which is in the register named in the argument. |
| 15071 | This uses a relocation against _gp_disp, which is handled specially |
| 15072 | by the linker. The result is: |
| 15073 | lui $gp,%hi(_gp_disp) |
| 15074 | addiu $gp,$gp,%lo(_gp_disp) |
| 15075 | addu $gp,$gp,.cpload argument |
| 15076 | The .cpload argument is normally $25 == $t9. |
| 15077 | |
| 15078 | The -mno-shared option changes this to: |
| 15079 | lui $gp,%hi(__gnu_local_gp) |
| 15080 | addiu $gp,$gp,%lo(__gnu_local_gp) |
| 15081 | and the argument is ignored. This saves an instruction, but the |
| 15082 | resulting code is not position independent; it uses an absolute |
| 15083 | address for __gnu_local_gp. Thus code assembled with -mno-shared |
| 15084 | can go into an ordinary executable, but not into a shared library. */ |
| 15085 | |
| 15086 | static void |
| 15087 | s_cpload (int ignore ATTRIBUTE_UNUSED) |
| 15088 | { |
| 15089 | expressionS ex; |
| 15090 | int reg; |
| 15091 | int in_shared; |
| 15092 | |
| 15093 | /* If we are not generating SVR4 PIC code, or if this is NewABI code, |
| 15094 | .cpload is ignored. */ |
| 15095 | if (mips_pic != SVR4_PIC || HAVE_NEWABI) |
| 15096 | { |
| 15097 | s_ignore (0); |
| 15098 | return; |
| 15099 | } |
| 15100 | |
| 15101 | if (mips_opts.mips16) |
| 15102 | { |
| 15103 | as_bad (_("%s not supported in MIPS16 mode"), ".cpload"); |
| 15104 | ignore_rest_of_line (); |
| 15105 | return; |
| 15106 | } |
| 15107 | |
| 15108 | /* .cpload should be in a .set noreorder section. */ |
| 15109 | if (mips_opts.noreorder == 0) |
| 15110 | as_warn (_(".cpload not in noreorder section")); |
| 15111 | |
| 15112 | reg = tc_get_register (0); |
| 15113 | |
| 15114 | /* If we need to produce a 64-bit address, we are better off using |
| 15115 | the default instruction sequence. */ |
| 15116 | in_shared = mips_in_shared || HAVE_64BIT_SYMBOLS; |
| 15117 | |
| 15118 | ex.X_op = O_symbol; |
| 15119 | ex.X_add_symbol = symbol_find_or_make (in_shared ? "_gp_disp" : |
| 15120 | "__gnu_local_gp"); |
| 15121 | ex.X_op_symbol = NULL; |
| 15122 | ex.X_add_number = 0; |
| 15123 | |
| 15124 | /* In ELF, this symbol is implicitly an STT_OBJECT symbol. */ |
| 15125 | symbol_get_bfdsym (ex.X_add_symbol)->flags |= BSF_OBJECT; |
| 15126 | |
| 15127 | mips_mark_labels (); |
| 15128 | mips_assembling_insn = TRUE; |
| 15129 | |
| 15130 | macro_start (); |
| 15131 | macro_build_lui (&ex, mips_gp_register); |
| 15132 | macro_build (&ex, "addiu", "t,r,j", mips_gp_register, |
| 15133 | mips_gp_register, BFD_RELOC_LO16); |
| 15134 | if (in_shared) |
| 15135 | macro_build (NULL, "addu", "d,v,t", mips_gp_register, |
| 15136 | mips_gp_register, reg); |
| 15137 | macro_end (); |
| 15138 | |
| 15139 | mips_assembling_insn = FALSE; |
| 15140 | demand_empty_rest_of_line (); |
| 15141 | } |
| 15142 | |
| 15143 | /* Handle the .cpsetup pseudo-op defined for NewABI PIC code. The syntax is: |
| 15144 | .cpsetup $reg1, offset|$reg2, label |
| 15145 | |
| 15146 | If offset is given, this results in: |
| 15147 | sd $gp, offset($sp) |
| 15148 | lui $gp, %hi(%neg(%gp_rel(label))) |
| 15149 | addiu $gp, $gp, %lo(%neg(%gp_rel(label))) |
| 15150 | daddu $gp, $gp, $reg1 |
| 15151 | |
| 15152 | If $reg2 is given, this results in: |
| 15153 | daddu $reg2, $gp, $0 |
| 15154 | lui $gp, %hi(%neg(%gp_rel(label))) |
| 15155 | addiu $gp, $gp, %lo(%neg(%gp_rel(label))) |
| 15156 | daddu $gp, $gp, $reg1 |
| 15157 | $reg1 is normally $25 == $t9. |
| 15158 | |
| 15159 | The -mno-shared option replaces the last three instructions with |
| 15160 | lui $gp,%hi(_gp) |
| 15161 | addiu $gp,$gp,%lo(_gp) */ |
| 15162 | |
| 15163 | static void |
| 15164 | s_cpsetup (int ignore ATTRIBUTE_UNUSED) |
| 15165 | { |
| 15166 | expressionS ex_off; |
| 15167 | expressionS ex_sym; |
| 15168 | int reg1; |
| 15169 | |
| 15170 | /* If we are not generating SVR4 PIC code, .cpsetup is ignored. |
| 15171 | We also need NewABI support. */ |
| 15172 | if (mips_pic != SVR4_PIC || ! HAVE_NEWABI) |
| 15173 | { |
| 15174 | s_ignore (0); |
| 15175 | return; |
| 15176 | } |
| 15177 | |
| 15178 | if (mips_opts.mips16) |
| 15179 | { |
| 15180 | as_bad (_("%s not supported in MIPS16 mode"), ".cpsetup"); |
| 15181 | ignore_rest_of_line (); |
| 15182 | return; |
| 15183 | } |
| 15184 | |
| 15185 | reg1 = tc_get_register (0); |
| 15186 | SKIP_WHITESPACE (); |
| 15187 | if (*input_line_pointer != ',') |
| 15188 | { |
| 15189 | as_bad (_("missing argument separator ',' for .cpsetup")); |
| 15190 | return; |
| 15191 | } |
| 15192 | else |
| 15193 | ++input_line_pointer; |
| 15194 | SKIP_WHITESPACE (); |
| 15195 | if (*input_line_pointer == '$') |
| 15196 | { |
| 15197 | mips_cpreturn_register = tc_get_register (0); |
| 15198 | mips_cpreturn_offset = -1; |
| 15199 | } |
| 15200 | else |
| 15201 | { |
| 15202 | mips_cpreturn_offset = get_absolute_expression (); |
| 15203 | mips_cpreturn_register = -1; |
| 15204 | } |
| 15205 | SKIP_WHITESPACE (); |
| 15206 | if (*input_line_pointer != ',') |
| 15207 | { |
| 15208 | as_bad (_("missing argument separator ',' for .cpsetup")); |
| 15209 | return; |
| 15210 | } |
| 15211 | else |
| 15212 | ++input_line_pointer; |
| 15213 | SKIP_WHITESPACE (); |
| 15214 | expression (&ex_sym); |
| 15215 | |
| 15216 | mips_mark_labels (); |
| 15217 | mips_assembling_insn = TRUE; |
| 15218 | |
| 15219 | macro_start (); |
| 15220 | if (mips_cpreturn_register == -1) |
| 15221 | { |
| 15222 | ex_off.X_op = O_constant; |
| 15223 | ex_off.X_add_symbol = NULL; |
| 15224 | ex_off.X_op_symbol = NULL; |
| 15225 | ex_off.X_add_number = mips_cpreturn_offset; |
| 15226 | |
| 15227 | macro_build (&ex_off, "sd", "t,o(b)", mips_gp_register, |
| 15228 | BFD_RELOC_LO16, SP); |
| 15229 | } |
| 15230 | else |
| 15231 | macro_build (NULL, "daddu", "d,v,t", mips_cpreturn_register, |
| 15232 | mips_gp_register, 0); |
| 15233 | |
| 15234 | if (mips_in_shared || HAVE_64BIT_SYMBOLS) |
| 15235 | { |
| 15236 | macro_build (&ex_sym, "lui", LUI_FMT, mips_gp_register, |
| 15237 | -1, BFD_RELOC_GPREL16, BFD_RELOC_MIPS_SUB, |
| 15238 | BFD_RELOC_HI16_S); |
| 15239 | |
| 15240 | macro_build (&ex_sym, "addiu", "t,r,j", mips_gp_register, |
| 15241 | mips_gp_register, -1, BFD_RELOC_GPREL16, |
| 15242 | BFD_RELOC_MIPS_SUB, BFD_RELOC_LO16); |
| 15243 | |
| 15244 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", mips_gp_register, |
| 15245 | mips_gp_register, reg1); |
| 15246 | } |
| 15247 | else |
| 15248 | { |
| 15249 | expressionS ex; |
| 15250 | |
| 15251 | ex.X_op = O_symbol; |
| 15252 | ex.X_add_symbol = symbol_find_or_make ("__gnu_local_gp"); |
| 15253 | ex.X_op_symbol = NULL; |
| 15254 | ex.X_add_number = 0; |
| 15255 | |
| 15256 | /* In ELF, this symbol is implicitly an STT_OBJECT symbol. */ |
| 15257 | symbol_get_bfdsym (ex.X_add_symbol)->flags |= BSF_OBJECT; |
| 15258 | |
| 15259 | macro_build_lui (&ex, mips_gp_register); |
| 15260 | macro_build (&ex, "addiu", "t,r,j", mips_gp_register, |
| 15261 | mips_gp_register, BFD_RELOC_LO16); |
| 15262 | } |
| 15263 | |
| 15264 | macro_end (); |
| 15265 | |
| 15266 | mips_assembling_insn = FALSE; |
| 15267 | demand_empty_rest_of_line (); |
| 15268 | } |
| 15269 | |
| 15270 | static void |
| 15271 | s_cplocal (int ignore ATTRIBUTE_UNUSED) |
| 15272 | { |
| 15273 | /* If we are not generating SVR4 PIC code, or if this is not NewABI code, |
| 15274 | .cplocal is ignored. */ |
| 15275 | if (mips_pic != SVR4_PIC || ! HAVE_NEWABI) |
| 15276 | { |
| 15277 | s_ignore (0); |
| 15278 | return; |
| 15279 | } |
| 15280 | |
| 15281 | if (mips_opts.mips16) |
| 15282 | { |
| 15283 | as_bad (_("%s not supported in MIPS16 mode"), ".cplocal"); |
| 15284 | ignore_rest_of_line (); |
| 15285 | return; |
| 15286 | } |
| 15287 | |
| 15288 | mips_gp_register = tc_get_register (0); |
| 15289 | demand_empty_rest_of_line (); |
| 15290 | } |
| 15291 | |
| 15292 | /* Handle the .cprestore pseudo-op. This stores $gp into a given |
| 15293 | offset from $sp. The offset is remembered, and after making a PIC |
| 15294 | call $gp is restored from that location. */ |
| 15295 | |
| 15296 | static void |
| 15297 | s_cprestore (int ignore ATTRIBUTE_UNUSED) |
| 15298 | { |
| 15299 | expressionS ex; |
| 15300 | |
| 15301 | /* If we are not generating SVR4 PIC code, or if this is NewABI code, |
| 15302 | .cprestore is ignored. */ |
| 15303 | if (mips_pic != SVR4_PIC || HAVE_NEWABI) |
| 15304 | { |
| 15305 | s_ignore (0); |
| 15306 | return; |
| 15307 | } |
| 15308 | |
| 15309 | if (mips_opts.mips16) |
| 15310 | { |
| 15311 | as_bad (_("%s not supported in MIPS16 mode"), ".cprestore"); |
| 15312 | ignore_rest_of_line (); |
| 15313 | return; |
| 15314 | } |
| 15315 | |
| 15316 | mips_cprestore_offset = get_absolute_expression (); |
| 15317 | mips_cprestore_valid = 1; |
| 15318 | |
| 15319 | ex.X_op = O_constant; |
| 15320 | ex.X_add_symbol = NULL; |
| 15321 | ex.X_op_symbol = NULL; |
| 15322 | ex.X_add_number = mips_cprestore_offset; |
| 15323 | |
| 15324 | mips_mark_labels (); |
| 15325 | mips_assembling_insn = TRUE; |
| 15326 | |
| 15327 | macro_start (); |
| 15328 | macro_build_ldst_constoffset (&ex, ADDRESS_STORE_INSN, mips_gp_register, |
| 15329 | SP, HAVE_64BIT_ADDRESSES); |
| 15330 | macro_end (); |
| 15331 | |
| 15332 | mips_assembling_insn = FALSE; |
| 15333 | demand_empty_rest_of_line (); |
| 15334 | } |
| 15335 | |
| 15336 | /* Handle the .cpreturn pseudo-op defined for NewABI PIC code. If an offset |
| 15337 | was given in the preceding .cpsetup, it results in: |
| 15338 | ld $gp, offset($sp) |
| 15339 | |
| 15340 | If a register $reg2 was given there, it results in: |
| 15341 | daddu $gp, $reg2, $0 */ |
| 15342 | |
| 15343 | static void |
| 15344 | s_cpreturn (int ignore ATTRIBUTE_UNUSED) |
| 15345 | { |
| 15346 | expressionS ex; |
| 15347 | |
| 15348 | /* If we are not generating SVR4 PIC code, .cpreturn is ignored. |
| 15349 | We also need NewABI support. */ |
| 15350 | if (mips_pic != SVR4_PIC || ! HAVE_NEWABI) |
| 15351 | { |
| 15352 | s_ignore (0); |
| 15353 | return; |
| 15354 | } |
| 15355 | |
| 15356 | if (mips_opts.mips16) |
| 15357 | { |
| 15358 | as_bad (_("%s not supported in MIPS16 mode"), ".cpreturn"); |
| 15359 | ignore_rest_of_line (); |
| 15360 | return; |
| 15361 | } |
| 15362 | |
| 15363 | mips_mark_labels (); |
| 15364 | mips_assembling_insn = TRUE; |
| 15365 | |
| 15366 | macro_start (); |
| 15367 | if (mips_cpreturn_register == -1) |
| 15368 | { |
| 15369 | ex.X_op = O_constant; |
| 15370 | ex.X_add_symbol = NULL; |
| 15371 | ex.X_op_symbol = NULL; |
| 15372 | ex.X_add_number = mips_cpreturn_offset; |
| 15373 | |
| 15374 | macro_build (&ex, "ld", "t,o(b)", mips_gp_register, BFD_RELOC_LO16, SP); |
| 15375 | } |
| 15376 | else |
| 15377 | macro_build (NULL, "daddu", "d,v,t", mips_gp_register, |
| 15378 | mips_cpreturn_register, 0); |
| 15379 | macro_end (); |
| 15380 | |
| 15381 | mips_assembling_insn = FALSE; |
| 15382 | demand_empty_rest_of_line (); |
| 15383 | } |
| 15384 | |
| 15385 | /* Handle a .dtprelword, .dtpreldword, .tprelword, or .tpreldword |
| 15386 | pseudo-op; DIRSTR says which. The pseudo-op generates a BYTES-size |
| 15387 | DTP- or TP-relative relocation of type RTYPE, for use in either DWARF |
| 15388 | debug information or MIPS16 TLS. */ |
| 15389 | |
| 15390 | static void |
| 15391 | s_tls_rel_directive (const size_t bytes, const char *dirstr, |
| 15392 | bfd_reloc_code_real_type rtype) |
| 15393 | { |
| 15394 | expressionS ex; |
| 15395 | char *p; |
| 15396 | |
| 15397 | expression (&ex); |
| 15398 | |
| 15399 | if (ex.X_op != O_symbol) |
| 15400 | { |
| 15401 | as_bad (_("unsupported use of %s"), dirstr); |
| 15402 | ignore_rest_of_line (); |
| 15403 | } |
| 15404 | |
| 15405 | p = frag_more (bytes); |
| 15406 | md_number_to_chars (p, 0, bytes); |
| 15407 | fix_new_exp (frag_now, p - frag_now->fr_literal, bytes, &ex, FALSE, rtype); |
| 15408 | demand_empty_rest_of_line (); |
| 15409 | mips_clear_insn_labels (); |
| 15410 | } |
| 15411 | |
| 15412 | /* Handle .dtprelword. */ |
| 15413 | |
| 15414 | static void |
| 15415 | s_dtprelword (int ignore ATTRIBUTE_UNUSED) |
| 15416 | { |
| 15417 | s_tls_rel_directive (4, ".dtprelword", BFD_RELOC_MIPS_TLS_DTPREL32); |
| 15418 | } |
| 15419 | |
| 15420 | /* Handle .dtpreldword. */ |
| 15421 | |
| 15422 | static void |
| 15423 | s_dtpreldword (int ignore ATTRIBUTE_UNUSED) |
| 15424 | { |
| 15425 | s_tls_rel_directive (8, ".dtpreldword", BFD_RELOC_MIPS_TLS_DTPREL64); |
| 15426 | } |
| 15427 | |
| 15428 | /* Handle .tprelword. */ |
| 15429 | |
| 15430 | static void |
| 15431 | s_tprelword (int ignore ATTRIBUTE_UNUSED) |
| 15432 | { |
| 15433 | s_tls_rel_directive (4, ".tprelword", BFD_RELOC_MIPS_TLS_TPREL32); |
| 15434 | } |
| 15435 | |
| 15436 | /* Handle .tpreldword. */ |
| 15437 | |
| 15438 | static void |
| 15439 | s_tpreldword (int ignore ATTRIBUTE_UNUSED) |
| 15440 | { |
| 15441 | s_tls_rel_directive (8, ".tpreldword", BFD_RELOC_MIPS_TLS_TPREL64); |
| 15442 | } |
| 15443 | |
| 15444 | /* Handle the .gpvalue pseudo-op. This is used when generating NewABI PIC |
| 15445 | code. It sets the offset to use in gp_rel relocations. */ |
| 15446 | |
| 15447 | static void |
| 15448 | s_gpvalue (int ignore ATTRIBUTE_UNUSED) |
| 15449 | { |
| 15450 | /* If we are not generating SVR4 PIC code, .gpvalue is ignored. |
| 15451 | We also need NewABI support. */ |
| 15452 | if (mips_pic != SVR4_PIC || ! HAVE_NEWABI) |
| 15453 | { |
| 15454 | s_ignore (0); |
| 15455 | return; |
| 15456 | } |
| 15457 | |
| 15458 | mips_gprel_offset = get_absolute_expression (); |
| 15459 | |
| 15460 | demand_empty_rest_of_line (); |
| 15461 | } |
| 15462 | |
| 15463 | /* Handle the .gpword pseudo-op. This is used when generating PIC |
| 15464 | code. It generates a 32 bit GP relative reloc. */ |
| 15465 | |
| 15466 | static void |
| 15467 | s_gpword (int ignore ATTRIBUTE_UNUSED) |
| 15468 | { |
| 15469 | segment_info_type *si; |
| 15470 | struct insn_label_list *l; |
| 15471 | expressionS ex; |
| 15472 | char *p; |
| 15473 | |
| 15474 | /* When not generating PIC code, this is treated as .word. */ |
| 15475 | if (mips_pic != SVR4_PIC) |
| 15476 | { |
| 15477 | s_cons (2); |
| 15478 | return; |
| 15479 | } |
| 15480 | |
| 15481 | si = seg_info (now_seg); |
| 15482 | l = si->label_list; |
| 15483 | mips_emit_delays (); |
| 15484 | if (auto_align) |
| 15485 | mips_align (2, 0, l); |
| 15486 | |
| 15487 | expression (&ex); |
| 15488 | mips_clear_insn_labels (); |
| 15489 | |
| 15490 | if (ex.X_op != O_symbol || ex.X_add_number != 0) |
| 15491 | { |
| 15492 | as_bad (_("unsupported use of .gpword")); |
| 15493 | ignore_rest_of_line (); |
| 15494 | } |
| 15495 | |
| 15496 | p = frag_more (4); |
| 15497 | md_number_to_chars (p, 0, 4); |
| 15498 | fix_new_exp (frag_now, p - frag_now->fr_literal, 4, &ex, FALSE, |
| 15499 | BFD_RELOC_GPREL32); |
| 15500 | |
| 15501 | demand_empty_rest_of_line (); |
| 15502 | } |
| 15503 | |
| 15504 | static void |
| 15505 | s_gpdword (int ignore ATTRIBUTE_UNUSED) |
| 15506 | { |
| 15507 | segment_info_type *si; |
| 15508 | struct insn_label_list *l; |
| 15509 | expressionS ex; |
| 15510 | char *p; |
| 15511 | |
| 15512 | /* When not generating PIC code, this is treated as .dword. */ |
| 15513 | if (mips_pic != SVR4_PIC) |
| 15514 | { |
| 15515 | s_cons (3); |
| 15516 | return; |
| 15517 | } |
| 15518 | |
| 15519 | si = seg_info (now_seg); |
| 15520 | l = si->label_list; |
| 15521 | mips_emit_delays (); |
| 15522 | if (auto_align) |
| 15523 | mips_align (3, 0, l); |
| 15524 | |
| 15525 | expression (&ex); |
| 15526 | mips_clear_insn_labels (); |
| 15527 | |
| 15528 | if (ex.X_op != O_symbol || ex.X_add_number != 0) |
| 15529 | { |
| 15530 | as_bad (_("unsupported use of .gpdword")); |
| 15531 | ignore_rest_of_line (); |
| 15532 | } |
| 15533 | |
| 15534 | p = frag_more (8); |
| 15535 | md_number_to_chars (p, 0, 8); |
| 15536 | fix_new_exp (frag_now, p - frag_now->fr_literal, 4, &ex, FALSE, |
| 15537 | BFD_RELOC_GPREL32)->fx_tcbit = 1; |
| 15538 | |
| 15539 | /* GPREL32 composed with 64 gives a 64-bit GP offset. */ |
| 15540 | fix_new (frag_now, p - frag_now->fr_literal, 8, NULL, 0, |
| 15541 | FALSE, BFD_RELOC_64)->fx_tcbit = 1; |
| 15542 | |
| 15543 | demand_empty_rest_of_line (); |
| 15544 | } |
| 15545 | |
| 15546 | /* Handle the .ehword pseudo-op. This is used when generating unwinding |
| 15547 | tables. It generates a R_MIPS_EH reloc. */ |
| 15548 | |
| 15549 | static void |
| 15550 | s_ehword (int ignore ATTRIBUTE_UNUSED) |
| 15551 | { |
| 15552 | expressionS ex; |
| 15553 | char *p; |
| 15554 | |
| 15555 | mips_emit_delays (); |
| 15556 | |
| 15557 | expression (&ex); |
| 15558 | mips_clear_insn_labels (); |
| 15559 | |
| 15560 | if (ex.X_op != O_symbol || ex.X_add_number != 0) |
| 15561 | { |
| 15562 | as_bad (_("unsupported use of .ehword")); |
| 15563 | ignore_rest_of_line (); |
| 15564 | } |
| 15565 | |
| 15566 | p = frag_more (4); |
| 15567 | md_number_to_chars (p, 0, 4); |
| 15568 | fix_new_exp (frag_now, p - frag_now->fr_literal, 4, &ex, FALSE, |
| 15569 | BFD_RELOC_MIPS_EH); |
| 15570 | |
| 15571 | demand_empty_rest_of_line (); |
| 15572 | } |
| 15573 | |
| 15574 | /* Handle the .cpadd pseudo-op. This is used when dealing with switch |
| 15575 | tables in SVR4 PIC code. */ |
| 15576 | |
| 15577 | static void |
| 15578 | s_cpadd (int ignore ATTRIBUTE_UNUSED) |
| 15579 | { |
| 15580 | int reg; |
| 15581 | |
| 15582 | /* This is ignored when not generating SVR4 PIC code. */ |
| 15583 | if (mips_pic != SVR4_PIC) |
| 15584 | { |
| 15585 | s_ignore (0); |
| 15586 | return; |
| 15587 | } |
| 15588 | |
| 15589 | mips_mark_labels (); |
| 15590 | mips_assembling_insn = TRUE; |
| 15591 | |
| 15592 | /* Add $gp to the register named as an argument. */ |
| 15593 | macro_start (); |
| 15594 | reg = tc_get_register (0); |
| 15595 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", reg, reg, mips_gp_register); |
| 15596 | macro_end (); |
| 15597 | |
| 15598 | mips_assembling_insn = FALSE; |
| 15599 | demand_empty_rest_of_line (); |
| 15600 | } |
| 15601 | |
| 15602 | /* Handle the .insn pseudo-op. This marks instruction labels in |
| 15603 | mips16/micromips mode. This permits the linker to handle them specially, |
| 15604 | such as generating jalx instructions when needed. We also make |
| 15605 | them odd for the duration of the assembly, in order to generate the |
| 15606 | right sort of code. We will make them even in the adjust_symtab |
| 15607 | routine, while leaving them marked. This is convenient for the |
| 15608 | debugger and the disassembler. The linker knows to make them odd |
| 15609 | again. */ |
| 15610 | |
| 15611 | static void |
| 15612 | s_insn (int ignore ATTRIBUTE_UNUSED) |
| 15613 | { |
| 15614 | mips_mark_labels (); |
| 15615 | |
| 15616 | demand_empty_rest_of_line (); |
| 15617 | } |
| 15618 | |
| 15619 | /* Handle the .nan pseudo-op. */ |
| 15620 | |
| 15621 | static void |
| 15622 | s_nan (int ignore ATTRIBUTE_UNUSED) |
| 15623 | { |
| 15624 | static const char str_legacy[] = "legacy"; |
| 15625 | static const char str_2008[] = "2008"; |
| 15626 | size_t i; |
| 15627 | |
| 15628 | for (i = 0; !is_end_of_line[(unsigned char) input_line_pointer[i]]; i++); |
| 15629 | |
| 15630 | if (i == sizeof (str_2008) - 1 |
| 15631 | && memcmp (input_line_pointer, str_2008, i) == 0) |
| 15632 | mips_flag_nan2008 = TRUE; |
| 15633 | else if (i == sizeof (str_legacy) - 1 |
| 15634 | && memcmp (input_line_pointer, str_legacy, i) == 0) |
| 15635 | mips_flag_nan2008 = FALSE; |
| 15636 | else |
| 15637 | as_bad (_("bad .nan directive")); |
| 15638 | |
| 15639 | input_line_pointer += i; |
| 15640 | demand_empty_rest_of_line (); |
| 15641 | } |
| 15642 | |
| 15643 | /* Handle a .stab[snd] directive. Ideally these directives would be |
| 15644 | implemented in a transparent way, so that removing them would not |
| 15645 | have any effect on the generated instructions. However, s_stab |
| 15646 | internally changes the section, so in practice we need to decide |
| 15647 | now whether the preceding label marks compressed code. We do not |
| 15648 | support changing the compression mode of a label after a .stab* |
| 15649 | directive, such as in: |
| 15650 | |
| 15651 | foo: |
| 15652 | .stabs ... |
| 15653 | .set mips16 |
| 15654 | |
| 15655 | so the current mode wins. */ |
| 15656 | |
| 15657 | static void |
| 15658 | s_mips_stab (int type) |
| 15659 | { |
| 15660 | mips_mark_labels (); |
| 15661 | s_stab (type); |
| 15662 | } |
| 15663 | |
| 15664 | /* Handle the .weakext pseudo-op as defined in Kane and Heinrich. */ |
| 15665 | |
| 15666 | static void |
| 15667 | s_mips_weakext (int ignore ATTRIBUTE_UNUSED) |
| 15668 | { |
| 15669 | char *name; |
| 15670 | int c; |
| 15671 | symbolS *symbolP; |
| 15672 | expressionS exp; |
| 15673 | |
| 15674 | name = input_line_pointer; |
| 15675 | c = get_symbol_end (); |
| 15676 | symbolP = symbol_find_or_make (name); |
| 15677 | S_SET_WEAK (symbolP); |
| 15678 | *input_line_pointer = c; |
| 15679 | |
| 15680 | SKIP_WHITESPACE (); |
| 15681 | |
| 15682 | if (! is_end_of_line[(unsigned char) *input_line_pointer]) |
| 15683 | { |
| 15684 | if (S_IS_DEFINED (symbolP)) |
| 15685 | { |
| 15686 | as_bad (_("ignoring attempt to redefine symbol %s"), |
| 15687 | S_GET_NAME (symbolP)); |
| 15688 | ignore_rest_of_line (); |
| 15689 | return; |
| 15690 | } |
| 15691 | |
| 15692 | if (*input_line_pointer == ',') |
| 15693 | { |
| 15694 | ++input_line_pointer; |
| 15695 | SKIP_WHITESPACE (); |
| 15696 | } |
| 15697 | |
| 15698 | expression (&exp); |
| 15699 | if (exp.X_op != O_symbol) |
| 15700 | { |
| 15701 | as_bad (_("bad .weakext directive")); |
| 15702 | ignore_rest_of_line (); |
| 15703 | return; |
| 15704 | } |
| 15705 | symbol_set_value_expression (symbolP, &exp); |
| 15706 | } |
| 15707 | |
| 15708 | demand_empty_rest_of_line (); |
| 15709 | } |
| 15710 | |
| 15711 | /* Parse a register string into a number. Called from the ECOFF code |
| 15712 | to parse .frame. The argument is non-zero if this is the frame |
| 15713 | register, so that we can record it in mips_frame_reg. */ |
| 15714 | |
| 15715 | int |
| 15716 | tc_get_register (int frame) |
| 15717 | { |
| 15718 | unsigned int reg; |
| 15719 | |
| 15720 | SKIP_WHITESPACE (); |
| 15721 | if (! reg_lookup (&input_line_pointer, RWARN | RTYPE_NUM | RTYPE_GP, ®)) |
| 15722 | reg = 0; |
| 15723 | if (frame) |
| 15724 | { |
| 15725 | mips_frame_reg = reg != 0 ? reg : SP; |
| 15726 | mips_frame_reg_valid = 1; |
| 15727 | mips_cprestore_valid = 0; |
| 15728 | } |
| 15729 | return reg; |
| 15730 | } |
| 15731 | |
| 15732 | valueT |
| 15733 | md_section_align (asection *seg, valueT addr) |
| 15734 | { |
| 15735 | int align = bfd_get_section_alignment (stdoutput, seg); |
| 15736 | |
| 15737 | /* We don't need to align ELF sections to the full alignment. |
| 15738 | However, Irix 5 may prefer that we align them at least to a 16 |
| 15739 | byte boundary. We don't bother to align the sections if we |
| 15740 | are targeted for an embedded system. */ |
| 15741 | if (strncmp (TARGET_OS, "elf", 3) == 0) |
| 15742 | return addr; |
| 15743 | if (align > 4) |
| 15744 | align = 4; |
| 15745 | |
| 15746 | return ((addr + (1 << align) - 1) & (-1 << align)); |
| 15747 | } |
| 15748 | |
| 15749 | /* Utility routine, called from above as well. If called while the |
| 15750 | input file is still being read, it's only an approximation. (For |
| 15751 | example, a symbol may later become defined which appeared to be |
| 15752 | undefined earlier.) */ |
| 15753 | |
| 15754 | static int |
| 15755 | nopic_need_relax (symbolS *sym, int before_relaxing) |
| 15756 | { |
| 15757 | if (sym == 0) |
| 15758 | return 0; |
| 15759 | |
| 15760 | if (g_switch_value > 0) |
| 15761 | { |
| 15762 | const char *symname; |
| 15763 | int change; |
| 15764 | |
| 15765 | /* Find out whether this symbol can be referenced off the $gp |
| 15766 | register. It can be if it is smaller than the -G size or if |
| 15767 | it is in the .sdata or .sbss section. Certain symbols can |
| 15768 | not be referenced off the $gp, although it appears as though |
| 15769 | they can. */ |
| 15770 | symname = S_GET_NAME (sym); |
| 15771 | if (symname != (const char *) NULL |
| 15772 | && (strcmp (symname, "eprol") == 0 |
| 15773 | || strcmp (symname, "etext") == 0 |
| 15774 | || strcmp (symname, "_gp") == 0 |
| 15775 | || strcmp (symname, "edata") == 0 |
| 15776 | || strcmp (symname, "_fbss") == 0 |
| 15777 | || strcmp (symname, "_fdata") == 0 |
| 15778 | || strcmp (symname, "_ftext") == 0 |
| 15779 | || strcmp (symname, "end") == 0 |
| 15780 | || strcmp (symname, "_gp_disp") == 0)) |
| 15781 | change = 1; |
| 15782 | else if ((! S_IS_DEFINED (sym) || S_IS_COMMON (sym)) |
| 15783 | && (0 |
| 15784 | #ifndef NO_ECOFF_DEBUGGING |
| 15785 | || (symbol_get_obj (sym)->ecoff_extern_size != 0 |
| 15786 | && (symbol_get_obj (sym)->ecoff_extern_size |
| 15787 | <= g_switch_value)) |
| 15788 | #endif |
| 15789 | /* We must defer this decision until after the whole |
| 15790 | file has been read, since there might be a .extern |
| 15791 | after the first use of this symbol. */ |
| 15792 | || (before_relaxing |
| 15793 | #ifndef NO_ECOFF_DEBUGGING |
| 15794 | && symbol_get_obj (sym)->ecoff_extern_size == 0 |
| 15795 | #endif |
| 15796 | && S_GET_VALUE (sym) == 0) |
| 15797 | || (S_GET_VALUE (sym) != 0 |
| 15798 | && S_GET_VALUE (sym) <= g_switch_value))) |
| 15799 | change = 0; |
| 15800 | else |
| 15801 | { |
| 15802 | const char *segname; |
| 15803 | |
| 15804 | segname = segment_name (S_GET_SEGMENT (sym)); |
| 15805 | gas_assert (strcmp (segname, ".lit8") != 0 |
| 15806 | && strcmp (segname, ".lit4") != 0); |
| 15807 | change = (strcmp (segname, ".sdata") != 0 |
| 15808 | && strcmp (segname, ".sbss") != 0 |
| 15809 | && strncmp (segname, ".sdata.", 7) != 0 |
| 15810 | && strncmp (segname, ".sbss.", 6) != 0 |
| 15811 | && strncmp (segname, ".gnu.linkonce.sb.", 17) != 0 |
| 15812 | && strncmp (segname, ".gnu.linkonce.s.", 16) != 0); |
| 15813 | } |
| 15814 | return change; |
| 15815 | } |
| 15816 | else |
| 15817 | /* We are not optimizing for the $gp register. */ |
| 15818 | return 1; |
| 15819 | } |
| 15820 | |
| 15821 | |
| 15822 | /* Return true if the given symbol should be considered local for SVR4 PIC. */ |
| 15823 | |
| 15824 | static bfd_boolean |
| 15825 | pic_need_relax (symbolS *sym, asection *segtype) |
| 15826 | { |
| 15827 | asection *symsec; |
| 15828 | |
| 15829 | /* Handle the case of a symbol equated to another symbol. */ |
| 15830 | while (symbol_equated_reloc_p (sym)) |
| 15831 | { |
| 15832 | symbolS *n; |
| 15833 | |
| 15834 | /* It's possible to get a loop here in a badly written program. */ |
| 15835 | n = symbol_get_value_expression (sym)->X_add_symbol; |
| 15836 | if (n == sym) |
| 15837 | break; |
| 15838 | sym = n; |
| 15839 | } |
| 15840 | |
| 15841 | if (symbol_section_p (sym)) |
| 15842 | return TRUE; |
| 15843 | |
| 15844 | symsec = S_GET_SEGMENT (sym); |
| 15845 | |
| 15846 | /* This must duplicate the test in adjust_reloc_syms. */ |
| 15847 | return (!bfd_is_und_section (symsec) |
| 15848 | && !bfd_is_abs_section (symsec) |
| 15849 | && !bfd_is_com_section (symsec) |
| 15850 | && !s_is_linkonce (sym, segtype) |
| 15851 | /* A global or weak symbol is treated as external. */ |
| 15852 | && (!S_IS_WEAK (sym) && !S_IS_EXTERNAL (sym))); |
| 15853 | } |
| 15854 | |
| 15855 | |
| 15856 | /* Given a mips16 variant frag FRAGP, return non-zero if it needs an |
| 15857 | extended opcode. SEC is the section the frag is in. */ |
| 15858 | |
| 15859 | static int |
| 15860 | mips16_extended_frag (fragS *fragp, asection *sec, long stretch) |
| 15861 | { |
| 15862 | int type; |
| 15863 | const struct mips_int_operand *operand; |
| 15864 | offsetT val; |
| 15865 | segT symsec; |
| 15866 | fragS *sym_frag; |
| 15867 | |
| 15868 | if (RELAX_MIPS16_USER_SMALL (fragp->fr_subtype)) |
| 15869 | return 0; |
| 15870 | if (RELAX_MIPS16_USER_EXT (fragp->fr_subtype)) |
| 15871 | return 1; |
| 15872 | |
| 15873 | type = RELAX_MIPS16_TYPE (fragp->fr_subtype); |
| 15874 | operand = mips16_immed_operand (type, FALSE); |
| 15875 | |
| 15876 | sym_frag = symbol_get_frag (fragp->fr_symbol); |
| 15877 | val = S_GET_VALUE (fragp->fr_symbol); |
| 15878 | symsec = S_GET_SEGMENT (fragp->fr_symbol); |
| 15879 | |
| 15880 | if (operand->root.type == OP_PCREL) |
| 15881 | { |
| 15882 | const struct mips_pcrel_operand *pcrel_op; |
| 15883 | addressT addr; |
| 15884 | offsetT maxtiny; |
| 15885 | |
| 15886 | /* We won't have the section when we are called from |
| 15887 | mips_relax_frag. However, we will always have been called |
| 15888 | from md_estimate_size_before_relax first. If this is a |
| 15889 | branch to a different section, we mark it as such. If SEC is |
| 15890 | NULL, and the frag is not marked, then it must be a branch to |
| 15891 | the same section. */ |
| 15892 | pcrel_op = (const struct mips_pcrel_operand *) operand; |
| 15893 | if (sec == NULL) |
| 15894 | { |
| 15895 | if (RELAX_MIPS16_LONG_BRANCH (fragp->fr_subtype)) |
| 15896 | return 1; |
| 15897 | } |
| 15898 | else |
| 15899 | { |
| 15900 | /* Must have been called from md_estimate_size_before_relax. */ |
| 15901 | if (symsec != sec) |
| 15902 | { |
| 15903 | fragp->fr_subtype = |
| 15904 | RELAX_MIPS16_MARK_LONG_BRANCH (fragp->fr_subtype); |
| 15905 | |
| 15906 | /* FIXME: We should support this, and let the linker |
| 15907 | catch branches and loads that are out of range. */ |
| 15908 | as_bad_where (fragp->fr_file, fragp->fr_line, |
| 15909 | _("unsupported PC relative reference to different section")); |
| 15910 | |
| 15911 | return 1; |
| 15912 | } |
| 15913 | if (fragp != sym_frag && sym_frag->fr_address == 0) |
| 15914 | /* Assume non-extended on the first relaxation pass. |
| 15915 | The address we have calculated will be bogus if this is |
| 15916 | a forward branch to another frag, as the forward frag |
| 15917 | will have fr_address == 0. */ |
| 15918 | return 0; |
| 15919 | } |
| 15920 | |
| 15921 | /* In this case, we know for sure that the symbol fragment is in |
| 15922 | the same section. If the relax_marker of the symbol fragment |
| 15923 | differs from the relax_marker of this fragment, we have not |
| 15924 | yet adjusted the symbol fragment fr_address. We want to add |
| 15925 | in STRETCH in order to get a better estimate of the address. |
| 15926 | This particularly matters because of the shift bits. */ |
| 15927 | if (stretch != 0 |
| 15928 | && sym_frag->relax_marker != fragp->relax_marker) |
| 15929 | { |
| 15930 | fragS *f; |
| 15931 | |
| 15932 | /* Adjust stretch for any alignment frag. Note that if have |
| 15933 | been expanding the earlier code, the symbol may be |
| 15934 | defined in what appears to be an earlier frag. FIXME: |
| 15935 | This doesn't handle the fr_subtype field, which specifies |
| 15936 | a maximum number of bytes to skip when doing an |
| 15937 | alignment. */ |
| 15938 | for (f = fragp; f != NULL && f != sym_frag; f = f->fr_next) |
| 15939 | { |
| 15940 | if (f->fr_type == rs_align || f->fr_type == rs_align_code) |
| 15941 | { |
| 15942 | if (stretch < 0) |
| 15943 | stretch = - ((- stretch) |
| 15944 | & ~ ((1 << (int) f->fr_offset) - 1)); |
| 15945 | else |
| 15946 | stretch &= ~ ((1 << (int) f->fr_offset) - 1); |
| 15947 | if (stretch == 0) |
| 15948 | break; |
| 15949 | } |
| 15950 | } |
| 15951 | if (f != NULL) |
| 15952 | val += stretch; |
| 15953 | } |
| 15954 | |
| 15955 | addr = fragp->fr_address + fragp->fr_fix; |
| 15956 | |
| 15957 | /* The base address rules are complicated. The base address of |
| 15958 | a branch is the following instruction. The base address of a |
| 15959 | PC relative load or add is the instruction itself, but if it |
| 15960 | is in a delay slot (in which case it can not be extended) use |
| 15961 | the address of the instruction whose delay slot it is in. */ |
| 15962 | if (pcrel_op->include_isa_bit) |
| 15963 | { |
| 15964 | addr += 2; |
| 15965 | |
| 15966 | /* If we are currently assuming that this frag should be |
| 15967 | extended, then, the current address is two bytes |
| 15968 | higher. */ |
| 15969 | if (RELAX_MIPS16_EXTENDED (fragp->fr_subtype)) |
| 15970 | addr += 2; |
| 15971 | |
| 15972 | /* Ignore the low bit in the target, since it will be set |
| 15973 | for a text label. */ |
| 15974 | val &= -2; |
| 15975 | } |
| 15976 | else if (RELAX_MIPS16_JAL_DSLOT (fragp->fr_subtype)) |
| 15977 | addr -= 4; |
| 15978 | else if (RELAX_MIPS16_DSLOT (fragp->fr_subtype)) |
| 15979 | addr -= 2; |
| 15980 | |
| 15981 | val -= addr & -(1 << pcrel_op->align_log2); |
| 15982 | |
| 15983 | /* If any of the shifted bits are set, we must use an extended |
| 15984 | opcode. If the address depends on the size of this |
| 15985 | instruction, this can lead to a loop, so we arrange to always |
| 15986 | use an extended opcode. We only check this when we are in |
| 15987 | the main relaxation loop, when SEC is NULL. */ |
| 15988 | if ((val & ((1 << operand->shift) - 1)) != 0 && sec == NULL) |
| 15989 | { |
| 15990 | fragp->fr_subtype = |
| 15991 | RELAX_MIPS16_MARK_LONG_BRANCH (fragp->fr_subtype); |
| 15992 | return 1; |
| 15993 | } |
| 15994 | |
| 15995 | /* If we are about to mark a frag as extended because the value |
| 15996 | is precisely the next value above maxtiny, then there is a |
| 15997 | chance of an infinite loop as in the following code: |
| 15998 | la $4,foo |
| 15999 | .skip 1020 |
| 16000 | .align 2 |
| 16001 | foo: |
| 16002 | In this case when the la is extended, foo is 0x3fc bytes |
| 16003 | away, so the la can be shrunk, but then foo is 0x400 away, so |
| 16004 | the la must be extended. To avoid this loop, we mark the |
| 16005 | frag as extended if it was small, and is about to become |
| 16006 | extended with the next value above maxtiny. */ |
| 16007 | maxtiny = mips_int_operand_max (operand); |
| 16008 | if (val == maxtiny + (1 << operand->shift) |
| 16009 | && ! RELAX_MIPS16_EXTENDED (fragp->fr_subtype) |
| 16010 | && sec == NULL) |
| 16011 | { |
| 16012 | fragp->fr_subtype = |
| 16013 | RELAX_MIPS16_MARK_LONG_BRANCH (fragp->fr_subtype); |
| 16014 | return 1; |
| 16015 | } |
| 16016 | } |
| 16017 | else if (symsec != absolute_section && sec != NULL) |
| 16018 | as_bad_where (fragp->fr_file, fragp->fr_line, _("unsupported relocation")); |
| 16019 | |
| 16020 | return !mips16_immed_in_range_p (operand, BFD_RELOC_UNUSED, val); |
| 16021 | } |
| 16022 | |
| 16023 | /* Compute the length of a branch sequence, and adjust the |
| 16024 | RELAX_BRANCH_TOOFAR bit accordingly. If FRAGP is NULL, the |
| 16025 | worst-case length is computed, with UPDATE being used to indicate |
| 16026 | whether an unconditional (-1), branch-likely (+1) or regular (0) |
| 16027 | branch is to be computed. */ |
| 16028 | static int |
| 16029 | relaxed_branch_length (fragS *fragp, asection *sec, int update) |
| 16030 | { |
| 16031 | bfd_boolean toofar; |
| 16032 | int length; |
| 16033 | |
| 16034 | if (fragp |
| 16035 | && S_IS_DEFINED (fragp->fr_symbol) |
| 16036 | && sec == S_GET_SEGMENT (fragp->fr_symbol)) |
| 16037 | { |
| 16038 | addressT addr; |
| 16039 | offsetT val; |
| 16040 | |
| 16041 | val = S_GET_VALUE (fragp->fr_symbol) + fragp->fr_offset; |
| 16042 | |
| 16043 | addr = fragp->fr_address + fragp->fr_fix + 4; |
| 16044 | |
| 16045 | val -= addr; |
| 16046 | |
| 16047 | toofar = val < - (0x8000 << 2) || val >= (0x8000 << 2); |
| 16048 | } |
| 16049 | else if (fragp) |
| 16050 | /* If the symbol is not defined or it's in a different segment, |
| 16051 | assume the user knows what's going on and emit a short |
| 16052 | branch. */ |
| 16053 | toofar = FALSE; |
| 16054 | else |
| 16055 | toofar = TRUE; |
| 16056 | |
| 16057 | if (fragp && update && toofar != RELAX_BRANCH_TOOFAR (fragp->fr_subtype)) |
| 16058 | fragp->fr_subtype |
| 16059 | = RELAX_BRANCH_ENCODE (RELAX_BRANCH_AT (fragp->fr_subtype), |
| 16060 | RELAX_BRANCH_UNCOND (fragp->fr_subtype), |
| 16061 | RELAX_BRANCH_LIKELY (fragp->fr_subtype), |
| 16062 | RELAX_BRANCH_LINK (fragp->fr_subtype), |
| 16063 | toofar); |
| 16064 | |
| 16065 | length = 4; |
| 16066 | if (toofar) |
| 16067 | { |
| 16068 | if (fragp ? RELAX_BRANCH_LIKELY (fragp->fr_subtype) : (update > 0)) |
| 16069 | length += 8; |
| 16070 | |
| 16071 | if (mips_pic != NO_PIC) |
| 16072 | { |
| 16073 | /* Additional space for PIC loading of target address. */ |
| 16074 | length += 8; |
| 16075 | if (mips_opts.isa == ISA_MIPS1) |
| 16076 | /* Additional space for $at-stabilizing nop. */ |
| 16077 | length += 4; |
| 16078 | } |
| 16079 | |
| 16080 | /* If branch is conditional. */ |
| 16081 | if (fragp ? !RELAX_BRANCH_UNCOND (fragp->fr_subtype) : (update >= 0)) |
| 16082 | length += 8; |
| 16083 | } |
| 16084 | |
| 16085 | return length; |
| 16086 | } |
| 16087 | |
| 16088 | /* Compute the length of a branch sequence, and adjust the |
| 16089 | RELAX_MICROMIPS_TOOFAR32 bit accordingly. If FRAGP is NULL, the |
| 16090 | worst-case length is computed, with UPDATE being used to indicate |
| 16091 | whether an unconditional (-1), or regular (0) branch is to be |
| 16092 | computed. */ |
| 16093 | |
| 16094 | static int |
| 16095 | relaxed_micromips_32bit_branch_length (fragS *fragp, asection *sec, int update) |
| 16096 | { |
| 16097 | bfd_boolean toofar; |
| 16098 | int length; |
| 16099 | |
| 16100 | if (fragp |
| 16101 | && S_IS_DEFINED (fragp->fr_symbol) |
| 16102 | && sec == S_GET_SEGMENT (fragp->fr_symbol)) |
| 16103 | { |
| 16104 | addressT addr; |
| 16105 | offsetT val; |
| 16106 | |
| 16107 | val = S_GET_VALUE (fragp->fr_symbol) + fragp->fr_offset; |
| 16108 | /* Ignore the low bit in the target, since it will be set |
| 16109 | for a text label. */ |
| 16110 | if ((val & 1) != 0) |
| 16111 | --val; |
| 16112 | |
| 16113 | addr = fragp->fr_address + fragp->fr_fix + 4; |
| 16114 | |
| 16115 | val -= addr; |
| 16116 | |
| 16117 | toofar = val < - (0x8000 << 1) || val >= (0x8000 << 1); |
| 16118 | } |
| 16119 | else if (fragp) |
| 16120 | /* If the symbol is not defined or it's in a different segment, |
| 16121 | assume the user knows what's going on and emit a short |
| 16122 | branch. */ |
| 16123 | toofar = FALSE; |
| 16124 | else |
| 16125 | toofar = TRUE; |
| 16126 | |
| 16127 | if (fragp && update |
| 16128 | && toofar != RELAX_MICROMIPS_TOOFAR32 (fragp->fr_subtype)) |
| 16129 | fragp->fr_subtype = (toofar |
| 16130 | ? RELAX_MICROMIPS_MARK_TOOFAR32 (fragp->fr_subtype) |
| 16131 | : RELAX_MICROMIPS_CLEAR_TOOFAR32 (fragp->fr_subtype)); |
| 16132 | |
| 16133 | length = 4; |
| 16134 | if (toofar) |
| 16135 | { |
| 16136 | bfd_boolean compact_known = fragp != NULL; |
| 16137 | bfd_boolean compact = FALSE; |
| 16138 | bfd_boolean uncond; |
| 16139 | |
| 16140 | if (compact_known) |
| 16141 | compact = RELAX_MICROMIPS_COMPACT (fragp->fr_subtype); |
| 16142 | if (fragp) |
| 16143 | uncond = RELAX_MICROMIPS_UNCOND (fragp->fr_subtype); |
| 16144 | else |
| 16145 | uncond = update < 0; |
| 16146 | |
| 16147 | /* If label is out of range, we turn branch <br>: |
| 16148 | |
| 16149 | <br> label # 4 bytes |
| 16150 | 0: |
| 16151 | |
| 16152 | into: |
| 16153 | |
| 16154 | j label # 4 bytes |
| 16155 | nop # 2 bytes if compact && !PIC |
| 16156 | 0: |
| 16157 | */ |
| 16158 | if (mips_pic == NO_PIC && (!compact_known || compact)) |
| 16159 | length += 2; |
| 16160 | |
| 16161 | /* If assembling PIC code, we further turn: |
| 16162 | |
| 16163 | j label # 4 bytes |
| 16164 | |
| 16165 | into: |
| 16166 | |
| 16167 | lw/ld at, %got(label)(gp) # 4 bytes |
| 16168 | d/addiu at, %lo(label) # 4 bytes |
| 16169 | jr/c at # 2 bytes |
| 16170 | */ |
| 16171 | if (mips_pic != NO_PIC) |
| 16172 | length += 6; |
| 16173 | |
| 16174 | /* If branch <br> is conditional, we prepend negated branch <brneg>: |
| 16175 | |
| 16176 | <brneg> 0f # 4 bytes |
| 16177 | nop # 2 bytes if !compact |
| 16178 | */ |
| 16179 | if (!uncond) |
| 16180 | length += (compact_known && compact) ? 4 : 6; |
| 16181 | } |
| 16182 | |
| 16183 | return length; |
| 16184 | } |
| 16185 | |
| 16186 | /* Compute the length of a branch, and adjust the RELAX_MICROMIPS_TOOFAR16 |
| 16187 | bit accordingly. */ |
| 16188 | |
| 16189 | static int |
| 16190 | relaxed_micromips_16bit_branch_length (fragS *fragp, asection *sec, int update) |
| 16191 | { |
| 16192 | bfd_boolean toofar; |
| 16193 | |
| 16194 | if (fragp |
| 16195 | && S_IS_DEFINED (fragp->fr_symbol) |
| 16196 | && sec == S_GET_SEGMENT (fragp->fr_symbol)) |
| 16197 | { |
| 16198 | addressT addr; |
| 16199 | offsetT val; |
| 16200 | int type; |
| 16201 | |
| 16202 | val = S_GET_VALUE (fragp->fr_symbol) + fragp->fr_offset; |
| 16203 | /* Ignore the low bit in the target, since it will be set |
| 16204 | for a text label. */ |
| 16205 | if ((val & 1) != 0) |
| 16206 | --val; |
| 16207 | |
| 16208 | /* Assume this is a 2-byte branch. */ |
| 16209 | addr = fragp->fr_address + fragp->fr_fix + 2; |
| 16210 | |
| 16211 | /* We try to avoid the infinite loop by not adding 2 more bytes for |
| 16212 | long branches. */ |
| 16213 | |
| 16214 | val -= addr; |
| 16215 | |
| 16216 | type = RELAX_MICROMIPS_TYPE (fragp->fr_subtype); |
| 16217 | if (type == 'D') |
| 16218 | toofar = val < - (0x200 << 1) || val >= (0x200 << 1); |
| 16219 | else if (type == 'E') |
| 16220 | toofar = val < - (0x40 << 1) || val >= (0x40 << 1); |
| 16221 | else |
| 16222 | abort (); |
| 16223 | } |
| 16224 | else |
| 16225 | /* If the symbol is not defined or it's in a different segment, |
| 16226 | we emit a normal 32-bit branch. */ |
| 16227 | toofar = TRUE; |
| 16228 | |
| 16229 | if (fragp && update |
| 16230 | && toofar != RELAX_MICROMIPS_TOOFAR16 (fragp->fr_subtype)) |
| 16231 | fragp->fr_subtype |
| 16232 | = toofar ? RELAX_MICROMIPS_MARK_TOOFAR16 (fragp->fr_subtype) |
| 16233 | : RELAX_MICROMIPS_CLEAR_TOOFAR16 (fragp->fr_subtype); |
| 16234 | |
| 16235 | if (toofar) |
| 16236 | return 4; |
| 16237 | |
| 16238 | return 2; |
| 16239 | } |
| 16240 | |
| 16241 | /* Estimate the size of a frag before relaxing. Unless this is the |
| 16242 | mips16, we are not really relaxing here, and the final size is |
| 16243 | encoded in the subtype information. For the mips16, we have to |
| 16244 | decide whether we are using an extended opcode or not. */ |
| 16245 | |
| 16246 | int |
| 16247 | md_estimate_size_before_relax (fragS *fragp, asection *segtype) |
| 16248 | { |
| 16249 | int change; |
| 16250 | |
| 16251 | if (RELAX_BRANCH_P (fragp->fr_subtype)) |
| 16252 | { |
| 16253 | |
| 16254 | fragp->fr_var = relaxed_branch_length (fragp, segtype, FALSE); |
| 16255 | |
| 16256 | return fragp->fr_var; |
| 16257 | } |
| 16258 | |
| 16259 | if (RELAX_MIPS16_P (fragp->fr_subtype)) |
| 16260 | /* We don't want to modify the EXTENDED bit here; it might get us |
| 16261 | into infinite loops. We change it only in mips_relax_frag(). */ |
| 16262 | return (RELAX_MIPS16_EXTENDED (fragp->fr_subtype) ? 4 : 2); |
| 16263 | |
| 16264 | if (RELAX_MICROMIPS_P (fragp->fr_subtype)) |
| 16265 | { |
| 16266 | int length = 4; |
| 16267 | |
| 16268 | if (RELAX_MICROMIPS_TYPE (fragp->fr_subtype) != 0) |
| 16269 | length = relaxed_micromips_16bit_branch_length (fragp, segtype, FALSE); |
| 16270 | if (length == 4 && RELAX_MICROMIPS_RELAX32 (fragp->fr_subtype)) |
| 16271 | length = relaxed_micromips_32bit_branch_length (fragp, segtype, FALSE); |
| 16272 | fragp->fr_var = length; |
| 16273 | |
| 16274 | return length; |
| 16275 | } |
| 16276 | |
| 16277 | if (mips_pic == NO_PIC) |
| 16278 | change = nopic_need_relax (fragp->fr_symbol, 0); |
| 16279 | else if (mips_pic == SVR4_PIC) |
| 16280 | change = pic_need_relax (fragp->fr_symbol, segtype); |
| 16281 | else if (mips_pic == VXWORKS_PIC) |
| 16282 | /* For vxworks, GOT16 relocations never have a corresponding LO16. */ |
| 16283 | change = 0; |
| 16284 | else |
| 16285 | abort (); |
| 16286 | |
| 16287 | if (change) |
| 16288 | { |
| 16289 | fragp->fr_subtype |= RELAX_USE_SECOND; |
| 16290 | return -RELAX_FIRST (fragp->fr_subtype); |
| 16291 | } |
| 16292 | else |
| 16293 | return -RELAX_SECOND (fragp->fr_subtype); |
| 16294 | } |
| 16295 | |
| 16296 | /* This is called to see whether a reloc against a defined symbol |
| 16297 | should be converted into a reloc against a section. */ |
| 16298 | |
| 16299 | int |
| 16300 | mips_fix_adjustable (fixS *fixp) |
| 16301 | { |
| 16302 | if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT |
| 16303 | || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) |
| 16304 | return 0; |
| 16305 | |
| 16306 | if (fixp->fx_addsy == NULL) |
| 16307 | return 1; |
| 16308 | |
| 16309 | /* If symbol SYM is in a mergeable section, relocations of the form |
| 16310 | SYM + 0 can usually be made section-relative. The mergeable data |
| 16311 | is then identified by the section offset rather than by the symbol. |
| 16312 | |
| 16313 | However, if we're generating REL LO16 relocations, the offset is split |
| 16314 | between the LO16 and parterning high part relocation. The linker will |
| 16315 | need to recalculate the complete offset in order to correctly identify |
| 16316 | the merge data. |
| 16317 | |
| 16318 | The linker has traditionally not looked for the parterning high part |
| 16319 | relocation, and has thus allowed orphaned R_MIPS_LO16 relocations to be |
| 16320 | placed anywhere. Rather than break backwards compatibility by changing |
| 16321 | this, it seems better not to force the issue, and instead keep the |
| 16322 | original symbol. This will work with either linker behavior. */ |
| 16323 | if ((lo16_reloc_p (fixp->fx_r_type) |
| 16324 | || reloc_needs_lo_p (fixp->fx_r_type)) |
| 16325 | && HAVE_IN_PLACE_ADDENDS |
| 16326 | && (S_GET_SEGMENT (fixp->fx_addsy)->flags & SEC_MERGE) != 0) |
| 16327 | return 0; |
| 16328 | |
| 16329 | /* There is no place to store an in-place offset for JALR relocations. |
| 16330 | Likewise an in-range offset of limited PC-relative relocations may |
| 16331 | overflow the in-place relocatable field if recalculated against the |
| 16332 | start address of the symbol's containing section. */ |
| 16333 | if (HAVE_IN_PLACE_ADDENDS |
| 16334 | && (limited_pcrel_reloc_p (fixp->fx_r_type) |
| 16335 | || jalr_reloc_p (fixp->fx_r_type))) |
| 16336 | return 0; |
| 16337 | |
| 16338 | /* R_MIPS16_26 relocations against non-MIPS16 functions might resolve |
| 16339 | to a floating-point stub. The same is true for non-R_MIPS16_26 |
| 16340 | relocations against MIPS16 functions; in this case, the stub becomes |
| 16341 | the function's canonical address. |
| 16342 | |
| 16343 | Floating-point stubs are stored in unique .mips16.call.* or |
| 16344 | .mips16.fn.* sections. If a stub T for function F is in section S, |
| 16345 | the first relocation in section S must be against F; this is how the |
| 16346 | linker determines the target function. All relocations that might |
| 16347 | resolve to T must also be against F. We therefore have the following |
| 16348 | restrictions, which are given in an intentionally-redundant way: |
| 16349 | |
| 16350 | 1. We cannot reduce R_MIPS16_26 relocations against non-MIPS16 |
| 16351 | symbols. |
| 16352 | |
| 16353 | 2. We cannot reduce a stub's relocations against non-MIPS16 symbols |
| 16354 | if that stub might be used. |
| 16355 | |
| 16356 | 3. We cannot reduce non-R_MIPS16_26 relocations against MIPS16 |
| 16357 | symbols. |
| 16358 | |
| 16359 | 4. We cannot reduce a stub's relocations against MIPS16 symbols if |
| 16360 | that stub might be used. |
| 16361 | |
| 16362 | There is a further restriction: |
| 16363 | |
| 16364 | 5. We cannot reduce jump relocations (R_MIPS_26, R_MIPS16_26 or |
| 16365 | R_MICROMIPS_26_S1) against MIPS16 or microMIPS symbols on |
| 16366 | targets with in-place addends; the relocation field cannot |
| 16367 | encode the low bit. |
| 16368 | |
| 16369 | For simplicity, we deal with (3)-(4) by not reducing _any_ relocation |
| 16370 | against a MIPS16 symbol. We deal with (5) by by not reducing any |
| 16371 | such relocations on REL targets. |
| 16372 | |
| 16373 | We deal with (1)-(2) by saying that, if there's a R_MIPS16_26 |
| 16374 | relocation against some symbol R, no relocation against R may be |
| 16375 | reduced. (Note that this deals with (2) as well as (1) because |
| 16376 | relocations against global symbols will never be reduced on ELF |
| 16377 | targets.) This approach is a little simpler than trying to detect |
| 16378 | stub sections, and gives the "all or nothing" per-symbol consistency |
| 16379 | that we have for MIPS16 symbols. */ |
| 16380 | if (fixp->fx_subsy == NULL |
| 16381 | && (ELF_ST_IS_MIPS16 (S_GET_OTHER (fixp->fx_addsy)) |
| 16382 | || *symbol_get_tc (fixp->fx_addsy) |
| 16383 | || (HAVE_IN_PLACE_ADDENDS |
| 16384 | && ELF_ST_IS_MICROMIPS (S_GET_OTHER (fixp->fx_addsy)) |
| 16385 | && jmp_reloc_p (fixp->fx_r_type)))) |
| 16386 | return 0; |
| 16387 | |
| 16388 | return 1; |
| 16389 | } |
| 16390 | |
| 16391 | /* Translate internal representation of relocation info to BFD target |
| 16392 | format. */ |
| 16393 | |
| 16394 | arelent ** |
| 16395 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp) |
| 16396 | { |
| 16397 | static arelent *retval[4]; |
| 16398 | arelent *reloc; |
| 16399 | bfd_reloc_code_real_type code; |
| 16400 | |
| 16401 | memset (retval, 0, sizeof(retval)); |
| 16402 | reloc = retval[0] = (arelent *) xcalloc (1, sizeof (arelent)); |
| 16403 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); |
| 16404 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
| 16405 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; |
| 16406 | |
| 16407 | if (fixp->fx_pcrel) |
| 16408 | { |
| 16409 | gas_assert (fixp->fx_r_type == BFD_RELOC_16_PCREL_S2 |
| 16410 | || fixp->fx_r_type == BFD_RELOC_MICROMIPS_7_PCREL_S1 |
| 16411 | || fixp->fx_r_type == BFD_RELOC_MICROMIPS_10_PCREL_S1 |
| 16412 | || fixp->fx_r_type == BFD_RELOC_MICROMIPS_16_PCREL_S1 |
| 16413 | || fixp->fx_r_type == BFD_RELOC_32_PCREL); |
| 16414 | |
| 16415 | /* At this point, fx_addnumber is "symbol offset - pcrel address". |
| 16416 | Relocations want only the symbol offset. */ |
| 16417 | reloc->addend = fixp->fx_addnumber + reloc->address; |
| 16418 | } |
| 16419 | else |
| 16420 | reloc->addend = fixp->fx_addnumber; |
| 16421 | |
| 16422 | /* Since the old MIPS ELF ABI uses Rel instead of Rela, encode the vtable |
| 16423 | entry to be used in the relocation's section offset. */ |
| 16424 | if (! HAVE_NEWABI && fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) |
| 16425 | { |
| 16426 | reloc->address = reloc->addend; |
| 16427 | reloc->addend = 0; |
| 16428 | } |
| 16429 | |
| 16430 | code = fixp->fx_r_type; |
| 16431 | |
| 16432 | reloc->howto = bfd_reloc_type_lookup (stdoutput, code); |
| 16433 | if (reloc->howto == NULL) |
| 16434 | { |
| 16435 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 16436 | _("cannot represent %s relocation in this object file" |
| 16437 | " format"), |
| 16438 | bfd_get_reloc_code_name (code)); |
| 16439 | retval[0] = NULL; |
| 16440 | } |
| 16441 | |
| 16442 | return retval; |
| 16443 | } |
| 16444 | |
| 16445 | /* Relax a machine dependent frag. This returns the amount by which |
| 16446 | the current size of the frag should change. */ |
| 16447 | |
| 16448 | int |
| 16449 | mips_relax_frag (asection *sec, fragS *fragp, long stretch) |
| 16450 | { |
| 16451 | if (RELAX_BRANCH_P (fragp->fr_subtype)) |
| 16452 | { |
| 16453 | offsetT old_var = fragp->fr_var; |
| 16454 | |
| 16455 | fragp->fr_var = relaxed_branch_length (fragp, sec, TRUE); |
| 16456 | |
| 16457 | return fragp->fr_var - old_var; |
| 16458 | } |
| 16459 | |
| 16460 | if (RELAX_MICROMIPS_P (fragp->fr_subtype)) |
| 16461 | { |
| 16462 | offsetT old_var = fragp->fr_var; |
| 16463 | offsetT new_var = 4; |
| 16464 | |
| 16465 | if (RELAX_MICROMIPS_TYPE (fragp->fr_subtype) != 0) |
| 16466 | new_var = relaxed_micromips_16bit_branch_length (fragp, sec, TRUE); |
| 16467 | if (new_var == 4 && RELAX_MICROMIPS_RELAX32 (fragp->fr_subtype)) |
| 16468 | new_var = relaxed_micromips_32bit_branch_length (fragp, sec, TRUE); |
| 16469 | fragp->fr_var = new_var; |
| 16470 | |
| 16471 | return new_var - old_var; |
| 16472 | } |
| 16473 | |
| 16474 | if (! RELAX_MIPS16_P (fragp->fr_subtype)) |
| 16475 | return 0; |
| 16476 | |
| 16477 | if (mips16_extended_frag (fragp, NULL, stretch)) |
| 16478 | { |
| 16479 | if (RELAX_MIPS16_EXTENDED (fragp->fr_subtype)) |
| 16480 | return 0; |
| 16481 | fragp->fr_subtype = RELAX_MIPS16_MARK_EXTENDED (fragp->fr_subtype); |
| 16482 | return 2; |
| 16483 | } |
| 16484 | else |
| 16485 | { |
| 16486 | if (! RELAX_MIPS16_EXTENDED (fragp->fr_subtype)) |
| 16487 | return 0; |
| 16488 | fragp->fr_subtype = RELAX_MIPS16_CLEAR_EXTENDED (fragp->fr_subtype); |
| 16489 | return -2; |
| 16490 | } |
| 16491 | |
| 16492 | return 0; |
| 16493 | } |
| 16494 | |
| 16495 | /* Convert a machine dependent frag. */ |
| 16496 | |
| 16497 | void |
| 16498 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec, fragS *fragp) |
| 16499 | { |
| 16500 | if (RELAX_BRANCH_P (fragp->fr_subtype)) |
| 16501 | { |
| 16502 | char *buf; |
| 16503 | unsigned long insn; |
| 16504 | expressionS exp; |
| 16505 | fixS *fixp; |
| 16506 | |
| 16507 | buf = fragp->fr_literal + fragp->fr_fix; |
| 16508 | insn = read_insn (buf); |
| 16509 | |
| 16510 | if (!RELAX_BRANCH_TOOFAR (fragp->fr_subtype)) |
| 16511 | { |
| 16512 | /* We generate a fixup instead of applying it right now |
| 16513 | because, if there are linker relaxations, we're going to |
| 16514 | need the relocations. */ |
| 16515 | exp.X_op = O_symbol; |
| 16516 | exp.X_add_symbol = fragp->fr_symbol; |
| 16517 | exp.X_add_number = fragp->fr_offset; |
| 16518 | |
| 16519 | fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 4, &exp, TRUE, |
| 16520 | BFD_RELOC_16_PCREL_S2); |
| 16521 | fixp->fx_file = fragp->fr_file; |
| 16522 | fixp->fx_line = fragp->fr_line; |
| 16523 | |
| 16524 | buf = write_insn (buf, insn); |
| 16525 | } |
| 16526 | else |
| 16527 | { |
| 16528 | int i; |
| 16529 | |
| 16530 | as_warn_where (fragp->fr_file, fragp->fr_line, |
| 16531 | _("relaxed out-of-range branch into a jump")); |
| 16532 | |
| 16533 | if (RELAX_BRANCH_UNCOND (fragp->fr_subtype)) |
| 16534 | goto uncond; |
| 16535 | |
| 16536 | if (!RELAX_BRANCH_LIKELY (fragp->fr_subtype)) |
| 16537 | { |
| 16538 | /* Reverse the branch. */ |
| 16539 | switch ((insn >> 28) & 0xf) |
| 16540 | { |
| 16541 | case 4: |
| 16542 | /* bc[0-3][tf]l? instructions can have the condition |
| 16543 | reversed by tweaking a single TF bit, and their |
| 16544 | opcodes all have 0x4???????. */ |
| 16545 | gas_assert ((insn & 0xf3e00000) == 0x41000000); |
| 16546 | insn ^= 0x00010000; |
| 16547 | break; |
| 16548 | |
| 16549 | case 0: |
| 16550 | /* bltz 0x04000000 bgez 0x04010000 |
| 16551 | bltzal 0x04100000 bgezal 0x04110000 */ |
| 16552 | gas_assert ((insn & 0xfc0e0000) == 0x04000000); |
| 16553 | insn ^= 0x00010000; |
| 16554 | break; |
| 16555 | |
| 16556 | case 1: |
| 16557 | /* beq 0x10000000 bne 0x14000000 |
| 16558 | blez 0x18000000 bgtz 0x1c000000 */ |
| 16559 | insn ^= 0x04000000; |
| 16560 | break; |
| 16561 | |
| 16562 | default: |
| 16563 | abort (); |
| 16564 | } |
| 16565 | } |
| 16566 | |
| 16567 | if (RELAX_BRANCH_LINK (fragp->fr_subtype)) |
| 16568 | { |
| 16569 | /* Clear the and-link bit. */ |
| 16570 | gas_assert ((insn & 0xfc1c0000) == 0x04100000); |
| 16571 | |
| 16572 | /* bltzal 0x04100000 bgezal 0x04110000 |
| 16573 | bltzall 0x04120000 bgezall 0x04130000 */ |
| 16574 | insn &= ~0x00100000; |
| 16575 | } |
| 16576 | |
| 16577 | /* Branch over the branch (if the branch was likely) or the |
| 16578 | full jump (not likely case). Compute the offset from the |
| 16579 | current instruction to branch to. */ |
| 16580 | if (RELAX_BRANCH_LIKELY (fragp->fr_subtype)) |
| 16581 | i = 16; |
| 16582 | else |
| 16583 | { |
| 16584 | /* How many bytes in instructions we've already emitted? */ |
| 16585 | i = buf - fragp->fr_literal - fragp->fr_fix; |
| 16586 | /* How many bytes in instructions from here to the end? */ |
| 16587 | i = fragp->fr_var - i; |
| 16588 | } |
| 16589 | /* Convert to instruction count. */ |
| 16590 | i >>= 2; |
| 16591 | /* Branch counts from the next instruction. */ |
| 16592 | i--; |
| 16593 | insn |= i; |
| 16594 | /* Branch over the jump. */ |
| 16595 | buf = write_insn (buf, insn); |
| 16596 | |
| 16597 | /* nop */ |
| 16598 | buf = write_insn (buf, 0); |
| 16599 | |
| 16600 | if (RELAX_BRANCH_LIKELY (fragp->fr_subtype)) |
| 16601 | { |
| 16602 | /* beql $0, $0, 2f */ |
| 16603 | insn = 0x50000000; |
| 16604 | /* Compute the PC offset from the current instruction to |
| 16605 | the end of the variable frag. */ |
| 16606 | /* How many bytes in instructions we've already emitted? */ |
| 16607 | i = buf - fragp->fr_literal - fragp->fr_fix; |
| 16608 | /* How many bytes in instructions from here to the end? */ |
| 16609 | i = fragp->fr_var - i; |
| 16610 | /* Convert to instruction count. */ |
| 16611 | i >>= 2; |
| 16612 | /* Don't decrement i, because we want to branch over the |
| 16613 | delay slot. */ |
| 16614 | insn |= i; |
| 16615 | |
| 16616 | buf = write_insn (buf, insn); |
| 16617 | buf = write_insn (buf, 0); |
| 16618 | } |
| 16619 | |
| 16620 | uncond: |
| 16621 | if (mips_pic == NO_PIC) |
| 16622 | { |
| 16623 | /* j or jal. */ |
| 16624 | insn = (RELAX_BRANCH_LINK (fragp->fr_subtype) |
| 16625 | ? 0x0c000000 : 0x08000000); |
| 16626 | exp.X_op = O_symbol; |
| 16627 | exp.X_add_symbol = fragp->fr_symbol; |
| 16628 | exp.X_add_number = fragp->fr_offset; |
| 16629 | |
| 16630 | fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 4, &exp, |
| 16631 | FALSE, BFD_RELOC_MIPS_JMP); |
| 16632 | fixp->fx_file = fragp->fr_file; |
| 16633 | fixp->fx_line = fragp->fr_line; |
| 16634 | |
| 16635 | buf = write_insn (buf, insn); |
| 16636 | } |
| 16637 | else |
| 16638 | { |
| 16639 | unsigned long at = RELAX_BRANCH_AT (fragp->fr_subtype); |
| 16640 | |
| 16641 | /* lw/ld $at, <sym>($gp) R_MIPS_GOT16 */ |
| 16642 | insn = HAVE_64BIT_ADDRESSES ? 0xdf800000 : 0x8f800000; |
| 16643 | insn |= at << OP_SH_RT; |
| 16644 | exp.X_op = O_symbol; |
| 16645 | exp.X_add_symbol = fragp->fr_symbol; |
| 16646 | exp.X_add_number = fragp->fr_offset; |
| 16647 | |
| 16648 | if (fragp->fr_offset) |
| 16649 | { |
| 16650 | exp.X_add_symbol = make_expr_symbol (&exp); |
| 16651 | exp.X_add_number = 0; |
| 16652 | } |
| 16653 | |
| 16654 | fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 4, &exp, |
| 16655 | FALSE, BFD_RELOC_MIPS_GOT16); |
| 16656 | fixp->fx_file = fragp->fr_file; |
| 16657 | fixp->fx_line = fragp->fr_line; |
| 16658 | |
| 16659 | buf = write_insn (buf, insn); |
| 16660 | |
| 16661 | if (mips_opts.isa == ISA_MIPS1) |
| 16662 | /* nop */ |
| 16663 | buf = write_insn (buf, 0); |
| 16664 | |
| 16665 | /* d/addiu $at, $at, <sym> R_MIPS_LO16 */ |
| 16666 | insn = HAVE_64BIT_ADDRESSES ? 0x64000000 : 0x24000000; |
| 16667 | insn |= at << OP_SH_RS | at << OP_SH_RT; |
| 16668 | |
| 16669 | fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 4, &exp, |
| 16670 | FALSE, BFD_RELOC_LO16); |
| 16671 | fixp->fx_file = fragp->fr_file; |
| 16672 | fixp->fx_line = fragp->fr_line; |
| 16673 | |
| 16674 | buf = write_insn (buf, insn); |
| 16675 | |
| 16676 | /* j(al)r $at. */ |
| 16677 | if (RELAX_BRANCH_LINK (fragp->fr_subtype)) |
| 16678 | insn = 0x0000f809; |
| 16679 | else |
| 16680 | insn = 0x00000008; |
| 16681 | insn |= at << OP_SH_RS; |
| 16682 | |
| 16683 | buf = write_insn (buf, insn); |
| 16684 | } |
| 16685 | } |
| 16686 | |
| 16687 | fragp->fr_fix += fragp->fr_var; |
| 16688 | gas_assert (buf == fragp->fr_literal + fragp->fr_fix); |
| 16689 | return; |
| 16690 | } |
| 16691 | |
| 16692 | /* Relax microMIPS branches. */ |
| 16693 | if (RELAX_MICROMIPS_P (fragp->fr_subtype)) |
| 16694 | { |
| 16695 | char *buf = fragp->fr_literal + fragp->fr_fix; |
| 16696 | bfd_boolean compact = RELAX_MICROMIPS_COMPACT (fragp->fr_subtype); |
| 16697 | bfd_boolean al = RELAX_MICROMIPS_LINK (fragp->fr_subtype); |
| 16698 | int type = RELAX_MICROMIPS_TYPE (fragp->fr_subtype); |
| 16699 | bfd_boolean short_ds; |
| 16700 | unsigned long insn; |
| 16701 | expressionS exp; |
| 16702 | fixS *fixp; |
| 16703 | |
| 16704 | exp.X_op = O_symbol; |
| 16705 | exp.X_add_symbol = fragp->fr_symbol; |
| 16706 | exp.X_add_number = fragp->fr_offset; |
| 16707 | |
| 16708 | fragp->fr_fix += fragp->fr_var; |
| 16709 | |
| 16710 | /* Handle 16-bit branches that fit or are forced to fit. */ |
| 16711 | if (type != 0 && !RELAX_MICROMIPS_TOOFAR16 (fragp->fr_subtype)) |
| 16712 | { |
| 16713 | /* We generate a fixup instead of applying it right now, |
| 16714 | because if there is linker relaxation, we're going to |
| 16715 | need the relocations. */ |
| 16716 | if (type == 'D') |
| 16717 | fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 2, &exp, TRUE, |
| 16718 | BFD_RELOC_MICROMIPS_10_PCREL_S1); |
| 16719 | else if (type == 'E') |
| 16720 | fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 2, &exp, TRUE, |
| 16721 | BFD_RELOC_MICROMIPS_7_PCREL_S1); |
| 16722 | else |
| 16723 | abort (); |
| 16724 | |
| 16725 | fixp->fx_file = fragp->fr_file; |
| 16726 | fixp->fx_line = fragp->fr_line; |
| 16727 | |
| 16728 | /* These relocations can have an addend that won't fit in |
| 16729 | 2 octets. */ |
| 16730 | fixp->fx_no_overflow = 1; |
| 16731 | |
| 16732 | return; |
| 16733 | } |
| 16734 | |
| 16735 | /* Handle 32-bit branches that fit or are forced to fit. */ |
| 16736 | if (!RELAX_MICROMIPS_RELAX32 (fragp->fr_subtype) |
| 16737 | || !RELAX_MICROMIPS_TOOFAR32 (fragp->fr_subtype)) |
| 16738 | { |
| 16739 | /* We generate a fixup instead of applying it right now, |
| 16740 | because if there is linker relaxation, we're going to |
| 16741 | need the relocations. */ |
| 16742 | fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 4, &exp, TRUE, |
| 16743 | BFD_RELOC_MICROMIPS_16_PCREL_S1); |
| 16744 | fixp->fx_file = fragp->fr_file; |
| 16745 | fixp->fx_line = fragp->fr_line; |
| 16746 | |
| 16747 | if (type == 0) |
| 16748 | return; |
| 16749 | } |
| 16750 | |
| 16751 | /* Relax 16-bit branches to 32-bit branches. */ |
| 16752 | if (type != 0) |
| 16753 | { |
| 16754 | insn = read_compressed_insn (buf, 2); |
| 16755 | |
| 16756 | if ((insn & 0xfc00) == 0xcc00) /* b16 */ |
| 16757 | insn = 0x94000000; /* beq */ |
| 16758 | else if ((insn & 0xdc00) == 0x8c00) /* beqz16/bnez16 */ |
| 16759 | { |
| 16760 | unsigned long regno; |
| 16761 | |
| 16762 | regno = (insn >> MICROMIPSOP_SH_MD) & MICROMIPSOP_MASK_MD; |
| 16763 | regno = micromips_to_32_reg_d_map [regno]; |
| 16764 | insn = ((insn & 0x2000) << 16) | 0x94000000; /* beq/bne */ |
| 16765 | insn |= regno << MICROMIPSOP_SH_RS; |
| 16766 | } |
| 16767 | else |
| 16768 | abort (); |
| 16769 | |
| 16770 | /* Nothing else to do, just write it out. */ |
| 16771 | if (!RELAX_MICROMIPS_RELAX32 (fragp->fr_subtype) |
| 16772 | || !RELAX_MICROMIPS_TOOFAR32 (fragp->fr_subtype)) |
| 16773 | { |
| 16774 | buf = write_compressed_insn (buf, insn, 4); |
| 16775 | gas_assert (buf == fragp->fr_literal + fragp->fr_fix); |
| 16776 | return; |
| 16777 | } |
| 16778 | } |
| 16779 | else |
| 16780 | insn = read_compressed_insn (buf, 4); |
| 16781 | |
| 16782 | /* Relax 32-bit branches to a sequence of instructions. */ |
| 16783 | as_warn_where (fragp->fr_file, fragp->fr_line, |
| 16784 | _("relaxed out-of-range branch into a jump")); |
| 16785 | |
| 16786 | /* Set the short-delay-slot bit. */ |
| 16787 | short_ds = al && (insn & 0x02000000) != 0; |
| 16788 | |
| 16789 | if (!RELAX_MICROMIPS_UNCOND (fragp->fr_subtype)) |
| 16790 | { |
| 16791 | symbolS *l; |
| 16792 | |
| 16793 | /* Reverse the branch. */ |
| 16794 | if ((insn & 0xfc000000) == 0x94000000 /* beq */ |
| 16795 | || (insn & 0xfc000000) == 0xb4000000) /* bne */ |
| 16796 | insn ^= 0x20000000; |
| 16797 | else if ((insn & 0xffe00000) == 0x40000000 /* bltz */ |
| 16798 | || (insn & 0xffe00000) == 0x40400000 /* bgez */ |
| 16799 | || (insn & 0xffe00000) == 0x40800000 /* blez */ |
| 16800 | || (insn & 0xffe00000) == 0x40c00000 /* bgtz */ |
| 16801 | || (insn & 0xffe00000) == 0x40a00000 /* bnezc */ |
| 16802 | || (insn & 0xffe00000) == 0x40e00000 /* beqzc */ |
| 16803 | || (insn & 0xffe00000) == 0x40200000 /* bltzal */ |
| 16804 | || (insn & 0xffe00000) == 0x40600000 /* bgezal */ |
| 16805 | || (insn & 0xffe00000) == 0x42200000 /* bltzals */ |
| 16806 | || (insn & 0xffe00000) == 0x42600000) /* bgezals */ |
| 16807 | insn ^= 0x00400000; |
| 16808 | else if ((insn & 0xffe30000) == 0x43800000 /* bc1f */ |
| 16809 | || (insn & 0xffe30000) == 0x43a00000 /* bc1t */ |
| 16810 | || (insn & 0xffe30000) == 0x42800000 /* bc2f */ |
| 16811 | || (insn & 0xffe30000) == 0x42a00000) /* bc2t */ |
| 16812 | insn ^= 0x00200000; |
| 16813 | else |
| 16814 | abort (); |
| 16815 | |
| 16816 | if (al) |
| 16817 | { |
| 16818 | /* Clear the and-link and short-delay-slot bits. */ |
| 16819 | gas_assert ((insn & 0xfda00000) == 0x40200000); |
| 16820 | |
| 16821 | /* bltzal 0x40200000 bgezal 0x40600000 */ |
| 16822 | /* bltzals 0x42200000 bgezals 0x42600000 */ |
| 16823 | insn &= ~0x02200000; |
| 16824 | } |
| 16825 | |
| 16826 | /* Make a label at the end for use with the branch. */ |
| 16827 | l = symbol_new (micromips_label_name (), asec, fragp->fr_fix, fragp); |
| 16828 | micromips_label_inc (); |
| 16829 | S_SET_OTHER (l, ELF_ST_SET_MICROMIPS (S_GET_OTHER (l))); |
| 16830 | |
| 16831 | /* Refer to it. */ |
| 16832 | fixp = fix_new (fragp, buf - fragp->fr_literal, 4, l, 0, TRUE, |
| 16833 | BFD_RELOC_MICROMIPS_16_PCREL_S1); |
| 16834 | fixp->fx_file = fragp->fr_file; |
| 16835 | fixp->fx_line = fragp->fr_line; |
| 16836 | |
| 16837 | /* Branch over the jump. */ |
| 16838 | buf = write_compressed_insn (buf, insn, 4); |
| 16839 | if (!compact) |
| 16840 | /* nop */ |
| 16841 | buf = write_compressed_insn (buf, 0x0c00, 2); |
| 16842 | } |
| 16843 | |
| 16844 | if (mips_pic == NO_PIC) |
| 16845 | { |
| 16846 | unsigned long jal = short_ds ? 0x74000000 : 0xf4000000; /* jal/s */ |
| 16847 | |
| 16848 | /* j/jal/jals <sym> R_MICROMIPS_26_S1 */ |
| 16849 | insn = al ? jal : 0xd4000000; |
| 16850 | |
| 16851 | fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 4, &exp, FALSE, |
| 16852 | BFD_RELOC_MICROMIPS_JMP); |
| 16853 | fixp->fx_file = fragp->fr_file; |
| 16854 | fixp->fx_line = fragp->fr_line; |
| 16855 | |
| 16856 | buf = write_compressed_insn (buf, insn, 4); |
| 16857 | if (compact) |
| 16858 | /* nop */ |
| 16859 | buf = write_compressed_insn (buf, 0x0c00, 2); |
| 16860 | } |
| 16861 | else |
| 16862 | { |
| 16863 | unsigned long at = RELAX_MICROMIPS_AT (fragp->fr_subtype); |
| 16864 | unsigned long jalr = short_ds ? 0x45e0 : 0x45c0; /* jalr/s */ |
| 16865 | unsigned long jr = compact ? 0x45a0 : 0x4580; /* jr/c */ |
| 16866 | |
| 16867 | /* lw/ld $at, <sym>($gp) R_MICROMIPS_GOT16 */ |
| 16868 | insn = HAVE_64BIT_ADDRESSES ? 0xdc1c0000 : 0xfc1c0000; |
| 16869 | insn |= at << MICROMIPSOP_SH_RT; |
| 16870 | |
| 16871 | if (exp.X_add_number) |
| 16872 | { |
| 16873 | exp.X_add_symbol = make_expr_symbol (&exp); |
| 16874 | exp.X_add_number = 0; |
| 16875 | } |
| 16876 | |
| 16877 | fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 4, &exp, FALSE, |
| 16878 | BFD_RELOC_MICROMIPS_GOT16); |
| 16879 | fixp->fx_file = fragp->fr_file; |
| 16880 | fixp->fx_line = fragp->fr_line; |
| 16881 | |
| 16882 | buf = write_compressed_insn (buf, insn, 4); |
| 16883 | |
| 16884 | /* d/addiu $at, $at, <sym> R_MICROMIPS_LO16 */ |
| 16885 | insn = HAVE_64BIT_ADDRESSES ? 0x5c000000 : 0x30000000; |
| 16886 | insn |= at << MICROMIPSOP_SH_RT | at << MICROMIPSOP_SH_RS; |
| 16887 | |
| 16888 | fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 4, &exp, FALSE, |
| 16889 | BFD_RELOC_MICROMIPS_LO16); |
| 16890 | fixp->fx_file = fragp->fr_file; |
| 16891 | fixp->fx_line = fragp->fr_line; |
| 16892 | |
| 16893 | buf = write_compressed_insn (buf, insn, 4); |
| 16894 | |
| 16895 | /* jr/jrc/jalr/jalrs $at */ |
| 16896 | insn = al ? jalr : jr; |
| 16897 | insn |= at << MICROMIPSOP_SH_MJ; |
| 16898 | |
| 16899 | buf = write_compressed_insn (buf, insn, 2); |
| 16900 | } |
| 16901 | |
| 16902 | gas_assert (buf == fragp->fr_literal + fragp->fr_fix); |
| 16903 | return; |
| 16904 | } |
| 16905 | |
| 16906 | if (RELAX_MIPS16_P (fragp->fr_subtype)) |
| 16907 | { |
| 16908 | int type; |
| 16909 | const struct mips_int_operand *operand; |
| 16910 | offsetT val; |
| 16911 | char *buf; |
| 16912 | unsigned int user_length, length; |
| 16913 | unsigned long insn; |
| 16914 | bfd_boolean ext; |
| 16915 | |
| 16916 | type = RELAX_MIPS16_TYPE (fragp->fr_subtype); |
| 16917 | operand = mips16_immed_operand (type, FALSE); |
| 16918 | |
| 16919 | ext = RELAX_MIPS16_EXTENDED (fragp->fr_subtype); |
| 16920 | val = resolve_symbol_value (fragp->fr_symbol); |
| 16921 | if (operand->root.type == OP_PCREL) |
| 16922 | { |
| 16923 | const struct mips_pcrel_operand *pcrel_op; |
| 16924 | addressT addr; |
| 16925 | |
| 16926 | pcrel_op = (const struct mips_pcrel_operand *) operand; |
| 16927 | addr = fragp->fr_address + fragp->fr_fix; |
| 16928 | |
| 16929 | /* The rules for the base address of a PC relative reloc are |
| 16930 | complicated; see mips16_extended_frag. */ |
| 16931 | if (pcrel_op->include_isa_bit) |
| 16932 | { |
| 16933 | addr += 2; |
| 16934 | if (ext) |
| 16935 | addr += 2; |
| 16936 | /* Ignore the low bit in the target, since it will be |
| 16937 | set for a text label. */ |
| 16938 | val &= -2; |
| 16939 | } |
| 16940 | else if (RELAX_MIPS16_JAL_DSLOT (fragp->fr_subtype)) |
| 16941 | addr -= 4; |
| 16942 | else if (RELAX_MIPS16_DSLOT (fragp->fr_subtype)) |
| 16943 | addr -= 2; |
| 16944 | |
| 16945 | addr &= -(1 << pcrel_op->align_log2); |
| 16946 | val -= addr; |
| 16947 | |
| 16948 | /* Make sure the section winds up with the alignment we have |
| 16949 | assumed. */ |
| 16950 | if (operand->shift > 0) |
| 16951 | record_alignment (asec, operand->shift); |
| 16952 | } |
| 16953 | |
| 16954 | if (ext |
| 16955 | && (RELAX_MIPS16_JAL_DSLOT (fragp->fr_subtype) |
| 16956 | || RELAX_MIPS16_DSLOT (fragp->fr_subtype))) |
| 16957 | as_warn_where (fragp->fr_file, fragp->fr_line, |
| 16958 | _("extended instruction in delay slot")); |
| 16959 | |
| 16960 | buf = fragp->fr_literal + fragp->fr_fix; |
| 16961 | |
| 16962 | insn = read_compressed_insn (buf, 2); |
| 16963 | if (ext) |
| 16964 | insn |= MIPS16_EXTEND; |
| 16965 | |
| 16966 | if (RELAX_MIPS16_USER_EXT (fragp->fr_subtype)) |
| 16967 | user_length = 4; |
| 16968 | else if (RELAX_MIPS16_USER_SMALL (fragp->fr_subtype)) |
| 16969 | user_length = 2; |
| 16970 | else |
| 16971 | user_length = 0; |
| 16972 | |
| 16973 | mips16_immed (fragp->fr_file, fragp->fr_line, type, |
| 16974 | BFD_RELOC_UNUSED, val, user_length, &insn); |
| 16975 | |
| 16976 | length = (ext ? 4 : 2); |
| 16977 | gas_assert (mips16_opcode_length (insn) == length); |
| 16978 | write_compressed_insn (buf, insn, length); |
| 16979 | fragp->fr_fix += length; |
| 16980 | } |
| 16981 | else |
| 16982 | { |
| 16983 | relax_substateT subtype = fragp->fr_subtype; |
| 16984 | bfd_boolean second_longer = (subtype & RELAX_SECOND_LONGER) != 0; |
| 16985 | bfd_boolean use_second = (subtype & RELAX_USE_SECOND) != 0; |
| 16986 | int first, second; |
| 16987 | fixS *fixp; |
| 16988 | |
| 16989 | first = RELAX_FIRST (subtype); |
| 16990 | second = RELAX_SECOND (subtype); |
| 16991 | fixp = (fixS *) fragp->fr_opcode; |
| 16992 | |
| 16993 | /* If the delay slot chosen does not match the size of the instruction, |
| 16994 | then emit a warning. */ |
| 16995 | if ((!use_second && (subtype & RELAX_DELAY_SLOT_SIZE_FIRST) != 0) |
| 16996 | || (use_second && (subtype & RELAX_DELAY_SLOT_SIZE_SECOND) != 0)) |
| 16997 | { |
| 16998 | relax_substateT s; |
| 16999 | const char *msg; |
| 17000 | |
| 17001 | s = subtype & (RELAX_DELAY_SLOT_16BIT |
| 17002 | | RELAX_DELAY_SLOT_SIZE_FIRST |
| 17003 | | RELAX_DELAY_SLOT_SIZE_SECOND); |
| 17004 | msg = macro_warning (s); |
| 17005 | if (msg != NULL) |
| 17006 | as_warn_where (fragp->fr_file, fragp->fr_line, "%s", msg); |
| 17007 | subtype &= ~s; |
| 17008 | } |
| 17009 | |
| 17010 | /* Possibly emit a warning if we've chosen the longer option. */ |
| 17011 | if (use_second == second_longer) |
| 17012 | { |
| 17013 | relax_substateT s; |
| 17014 | const char *msg; |
| 17015 | |
| 17016 | s = (subtype |
| 17017 | & (RELAX_SECOND_LONGER | RELAX_NOMACRO | RELAX_DELAY_SLOT)); |
| 17018 | msg = macro_warning (s); |
| 17019 | if (msg != NULL) |
| 17020 | as_warn_where (fragp->fr_file, fragp->fr_line, "%s", msg); |
| 17021 | subtype &= ~s; |
| 17022 | } |
| 17023 | |
| 17024 | /* Go through all the fixups for the first sequence. Disable them |
| 17025 | (by marking them as done) if we're going to use the second |
| 17026 | sequence instead. */ |
| 17027 | while (fixp |
| 17028 | && fixp->fx_frag == fragp |
| 17029 | && fixp->fx_where < fragp->fr_fix - second) |
| 17030 | { |
| 17031 | if (subtype & RELAX_USE_SECOND) |
| 17032 | fixp->fx_done = 1; |
| 17033 | fixp = fixp->fx_next; |
| 17034 | } |
| 17035 | |
| 17036 | /* Go through the fixups for the second sequence. Disable them if |
| 17037 | we're going to use the first sequence, otherwise adjust their |
| 17038 | addresses to account for the relaxation. */ |
| 17039 | while (fixp && fixp->fx_frag == fragp) |
| 17040 | { |
| 17041 | if (subtype & RELAX_USE_SECOND) |
| 17042 | fixp->fx_where -= first; |
| 17043 | else |
| 17044 | fixp->fx_done = 1; |
| 17045 | fixp = fixp->fx_next; |
| 17046 | } |
| 17047 | |
| 17048 | /* Now modify the frag contents. */ |
| 17049 | if (subtype & RELAX_USE_SECOND) |
| 17050 | { |
| 17051 | char *start; |
| 17052 | |
| 17053 | start = fragp->fr_literal + fragp->fr_fix - first - second; |
| 17054 | memmove (start, start + first, second); |
| 17055 | fragp->fr_fix -= first; |
| 17056 | } |
| 17057 | else |
| 17058 | fragp->fr_fix -= second; |
| 17059 | } |
| 17060 | } |
| 17061 | |
| 17062 | /* This function is called after the relocs have been generated. |
| 17063 | We've been storing mips16 text labels as odd. Here we convert them |
| 17064 | back to even for the convenience of the debugger. */ |
| 17065 | |
| 17066 | void |
| 17067 | mips_frob_file_after_relocs (void) |
| 17068 | { |
| 17069 | asymbol **syms; |
| 17070 | unsigned int count, i; |
| 17071 | |
| 17072 | syms = bfd_get_outsymbols (stdoutput); |
| 17073 | count = bfd_get_symcount (stdoutput); |
| 17074 | for (i = 0; i < count; i++, syms++) |
| 17075 | if (ELF_ST_IS_COMPRESSED (elf_symbol (*syms)->internal_elf_sym.st_other) |
| 17076 | && ((*syms)->value & 1) != 0) |
| 17077 | { |
| 17078 | (*syms)->value &= ~1; |
| 17079 | /* If the symbol has an odd size, it was probably computed |
| 17080 | incorrectly, so adjust that as well. */ |
| 17081 | if ((elf_symbol (*syms)->internal_elf_sym.st_size & 1) != 0) |
| 17082 | ++elf_symbol (*syms)->internal_elf_sym.st_size; |
| 17083 | } |
| 17084 | } |
| 17085 | |
| 17086 | /* This function is called whenever a label is defined, including fake |
| 17087 | labels instantiated off the dot special symbol. It is used when |
| 17088 | handling branch delays; if a branch has a label, we assume we cannot |
| 17089 | move it. This also bumps the value of the symbol by 1 in compressed |
| 17090 | code. */ |
| 17091 | |
| 17092 | static void |
| 17093 | mips_record_label (symbolS *sym) |
| 17094 | { |
| 17095 | segment_info_type *si = seg_info (now_seg); |
| 17096 | struct insn_label_list *l; |
| 17097 | |
| 17098 | if (free_insn_labels == NULL) |
| 17099 | l = (struct insn_label_list *) xmalloc (sizeof *l); |
| 17100 | else |
| 17101 | { |
| 17102 | l = free_insn_labels; |
| 17103 | free_insn_labels = l->next; |
| 17104 | } |
| 17105 | |
| 17106 | l->label = sym; |
| 17107 | l->next = si->label_list; |
| 17108 | si->label_list = l; |
| 17109 | } |
| 17110 | |
| 17111 | /* This function is called as tc_frob_label() whenever a label is defined |
| 17112 | and adds a DWARF-2 record we only want for true labels. */ |
| 17113 | |
| 17114 | void |
| 17115 | mips_define_label (symbolS *sym) |
| 17116 | { |
| 17117 | mips_record_label (sym); |
| 17118 | dwarf2_emit_label (sym); |
| 17119 | } |
| 17120 | |
| 17121 | /* This function is called by tc_new_dot_label whenever a new dot symbol |
| 17122 | is defined. */ |
| 17123 | |
| 17124 | void |
| 17125 | mips_add_dot_label (symbolS *sym) |
| 17126 | { |
| 17127 | mips_record_label (sym); |
| 17128 | if (mips_assembling_insn && HAVE_CODE_COMPRESSION) |
| 17129 | mips_compressed_mark_label (sym); |
| 17130 | } |
| 17131 | \f |
| 17132 | /* Some special processing for a MIPS ELF file. */ |
| 17133 | |
| 17134 | void |
| 17135 | mips_elf_final_processing (void) |
| 17136 | { |
| 17137 | /* Write out the register information. */ |
| 17138 | if (mips_abi != N64_ABI) |
| 17139 | { |
| 17140 | Elf32_RegInfo s; |
| 17141 | |
| 17142 | s.ri_gprmask = mips_gprmask; |
| 17143 | s.ri_cprmask[0] = mips_cprmask[0]; |
| 17144 | s.ri_cprmask[1] = mips_cprmask[1]; |
| 17145 | s.ri_cprmask[2] = mips_cprmask[2]; |
| 17146 | s.ri_cprmask[3] = mips_cprmask[3]; |
| 17147 | /* The gp_value field is set by the MIPS ELF backend. */ |
| 17148 | |
| 17149 | bfd_mips_elf32_swap_reginfo_out (stdoutput, &s, |
| 17150 | ((Elf32_External_RegInfo *) |
| 17151 | mips_regmask_frag)); |
| 17152 | } |
| 17153 | else |
| 17154 | { |
| 17155 | Elf64_Internal_RegInfo s; |
| 17156 | |
| 17157 | s.ri_gprmask = mips_gprmask; |
| 17158 | s.ri_pad = 0; |
| 17159 | s.ri_cprmask[0] = mips_cprmask[0]; |
| 17160 | s.ri_cprmask[1] = mips_cprmask[1]; |
| 17161 | s.ri_cprmask[2] = mips_cprmask[2]; |
| 17162 | s.ri_cprmask[3] = mips_cprmask[3]; |
| 17163 | /* The gp_value field is set by the MIPS ELF backend. */ |
| 17164 | |
| 17165 | bfd_mips_elf64_swap_reginfo_out (stdoutput, &s, |
| 17166 | ((Elf64_External_RegInfo *) |
| 17167 | mips_regmask_frag)); |
| 17168 | } |
| 17169 | |
| 17170 | /* Set the MIPS ELF flag bits. FIXME: There should probably be some |
| 17171 | sort of BFD interface for this. */ |
| 17172 | if (mips_any_noreorder) |
| 17173 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_NOREORDER; |
| 17174 | if (mips_pic != NO_PIC) |
| 17175 | { |
| 17176 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_PIC; |
| 17177 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_CPIC; |
| 17178 | } |
| 17179 | if (mips_abicalls) |
| 17180 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_CPIC; |
| 17181 | |
| 17182 | /* Set MIPS ELF flags for ASEs. Note that not all ASEs have flags |
| 17183 | defined at present; this might need to change in future. */ |
| 17184 | if (file_ase_mips16) |
| 17185 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_ARCH_ASE_M16; |
| 17186 | if (file_ase_micromips) |
| 17187 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_ARCH_ASE_MICROMIPS; |
| 17188 | if (file_ase & ASE_MDMX) |
| 17189 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_ARCH_ASE_MDMX; |
| 17190 | |
| 17191 | /* Set the MIPS ELF ABI flags. */ |
| 17192 | if (mips_abi == O32_ABI && USE_E_MIPS_ABI_O32) |
| 17193 | elf_elfheader (stdoutput)->e_flags |= E_MIPS_ABI_O32; |
| 17194 | else if (mips_abi == O64_ABI) |
| 17195 | elf_elfheader (stdoutput)->e_flags |= E_MIPS_ABI_O64; |
| 17196 | else if (mips_abi == EABI_ABI) |
| 17197 | { |
| 17198 | if (!file_mips_gp32) |
| 17199 | elf_elfheader (stdoutput)->e_flags |= E_MIPS_ABI_EABI64; |
| 17200 | else |
| 17201 | elf_elfheader (stdoutput)->e_flags |= E_MIPS_ABI_EABI32; |
| 17202 | } |
| 17203 | else if (mips_abi == N32_ABI) |
| 17204 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_ABI2; |
| 17205 | |
| 17206 | /* Nothing to do for N64_ABI. */ |
| 17207 | |
| 17208 | if (mips_32bitmode) |
| 17209 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_32BITMODE; |
| 17210 | |
| 17211 | if (mips_flag_nan2008) |
| 17212 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_NAN2008; |
| 17213 | |
| 17214 | #if 0 /* XXX FIXME */ |
| 17215 | /* 32 bit code with 64 bit FP registers. */ |
| 17216 | if (!file_mips_fp32 && ABI_NEEDS_32BIT_REGS (mips_abi)) |
| 17217 | elf_elfheader (stdoutput)->e_flags |= ???; |
| 17218 | #endif |
| 17219 | } |
| 17220 | \f |
| 17221 | typedef struct proc { |
| 17222 | symbolS *func_sym; |
| 17223 | symbolS *func_end_sym; |
| 17224 | unsigned long reg_mask; |
| 17225 | unsigned long reg_offset; |
| 17226 | unsigned long fpreg_mask; |
| 17227 | unsigned long fpreg_offset; |
| 17228 | unsigned long frame_offset; |
| 17229 | unsigned long frame_reg; |
| 17230 | unsigned long pc_reg; |
| 17231 | } procS; |
| 17232 | |
| 17233 | static procS cur_proc; |
| 17234 | static procS *cur_proc_ptr; |
| 17235 | static int numprocs; |
| 17236 | |
| 17237 | /* Implement NOP_OPCODE. We encode a MIPS16 nop as "1", a microMIPS nop |
| 17238 | as "2", and a normal nop as "0". */ |
| 17239 | |
| 17240 | #define NOP_OPCODE_MIPS 0 |
| 17241 | #define NOP_OPCODE_MIPS16 1 |
| 17242 | #define NOP_OPCODE_MICROMIPS 2 |
| 17243 | |
| 17244 | char |
| 17245 | mips_nop_opcode (void) |
| 17246 | { |
| 17247 | if (seg_info (now_seg)->tc_segment_info_data.micromips) |
| 17248 | return NOP_OPCODE_MICROMIPS; |
| 17249 | else if (seg_info (now_seg)->tc_segment_info_data.mips16) |
| 17250 | return NOP_OPCODE_MIPS16; |
| 17251 | else |
| 17252 | return NOP_OPCODE_MIPS; |
| 17253 | } |
| 17254 | |
| 17255 | /* Fill in an rs_align_code fragment. Unlike elsewhere we want to use |
| 17256 | 32-bit microMIPS NOPs here (if applicable). */ |
| 17257 | |
| 17258 | void |
| 17259 | mips_handle_align (fragS *fragp) |
| 17260 | { |
| 17261 | char nop_opcode; |
| 17262 | char *p; |
| 17263 | int bytes, size, excess; |
| 17264 | valueT opcode; |
| 17265 | |
| 17266 | if (fragp->fr_type != rs_align_code) |
| 17267 | return; |
| 17268 | |
| 17269 | p = fragp->fr_literal + fragp->fr_fix; |
| 17270 | nop_opcode = *p; |
| 17271 | switch (nop_opcode) |
| 17272 | { |
| 17273 | case NOP_OPCODE_MICROMIPS: |
| 17274 | opcode = micromips_nop32_insn.insn_opcode; |
| 17275 | size = 4; |
| 17276 | break; |
| 17277 | case NOP_OPCODE_MIPS16: |
| 17278 | opcode = mips16_nop_insn.insn_opcode; |
| 17279 | size = 2; |
| 17280 | break; |
| 17281 | case NOP_OPCODE_MIPS: |
| 17282 | default: |
| 17283 | opcode = nop_insn.insn_opcode; |
| 17284 | size = 4; |
| 17285 | break; |
| 17286 | } |
| 17287 | |
| 17288 | bytes = fragp->fr_next->fr_address - fragp->fr_address - fragp->fr_fix; |
| 17289 | excess = bytes % size; |
| 17290 | |
| 17291 | /* Handle the leading part if we're not inserting a whole number of |
| 17292 | instructions, and make it the end of the fixed part of the frag. |
| 17293 | Try to fit in a short microMIPS NOP if applicable and possible, |
| 17294 | and use zeroes otherwise. */ |
| 17295 | gas_assert (excess < 4); |
| 17296 | fragp->fr_fix += excess; |
| 17297 | switch (excess) |
| 17298 | { |
| 17299 | case 3: |
| 17300 | *p++ = '\0'; |
| 17301 | /* Fall through. */ |
| 17302 | case 2: |
| 17303 | if (nop_opcode == NOP_OPCODE_MICROMIPS && !mips_opts.insn32) |
| 17304 | { |
| 17305 | p = write_compressed_insn (p, micromips_nop16_insn.insn_opcode, 2); |
| 17306 | break; |
| 17307 | } |
| 17308 | *p++ = '\0'; |
| 17309 | /* Fall through. */ |
| 17310 | case 1: |
| 17311 | *p++ = '\0'; |
| 17312 | /* Fall through. */ |
| 17313 | case 0: |
| 17314 | break; |
| 17315 | } |
| 17316 | |
| 17317 | md_number_to_chars (p, opcode, size); |
| 17318 | fragp->fr_var = size; |
| 17319 | } |
| 17320 | |
| 17321 | static void |
| 17322 | md_obj_begin (void) |
| 17323 | { |
| 17324 | } |
| 17325 | |
| 17326 | static void |
| 17327 | md_obj_end (void) |
| 17328 | { |
| 17329 | /* Check for premature end, nesting errors, etc. */ |
| 17330 | if (cur_proc_ptr) |
| 17331 | as_warn (_("missing .end at end of assembly")); |
| 17332 | } |
| 17333 | |
| 17334 | static long |
| 17335 | get_number (void) |
| 17336 | { |
| 17337 | int negative = 0; |
| 17338 | long val = 0; |
| 17339 | |
| 17340 | if (*input_line_pointer == '-') |
| 17341 | { |
| 17342 | ++input_line_pointer; |
| 17343 | negative = 1; |
| 17344 | } |
| 17345 | if (!ISDIGIT (*input_line_pointer)) |
| 17346 | as_bad (_("expected simple number")); |
| 17347 | if (input_line_pointer[0] == '0') |
| 17348 | { |
| 17349 | if (input_line_pointer[1] == 'x') |
| 17350 | { |
| 17351 | input_line_pointer += 2; |
| 17352 | while (ISXDIGIT (*input_line_pointer)) |
| 17353 | { |
| 17354 | val <<= 4; |
| 17355 | val |= hex_value (*input_line_pointer++); |
| 17356 | } |
| 17357 | return negative ? -val : val; |
| 17358 | } |
| 17359 | else |
| 17360 | { |
| 17361 | ++input_line_pointer; |
| 17362 | while (ISDIGIT (*input_line_pointer)) |
| 17363 | { |
| 17364 | val <<= 3; |
| 17365 | val |= *input_line_pointer++ - '0'; |
| 17366 | } |
| 17367 | return negative ? -val : val; |
| 17368 | } |
| 17369 | } |
| 17370 | if (!ISDIGIT (*input_line_pointer)) |
| 17371 | { |
| 17372 | printf (_(" *input_line_pointer == '%c' 0x%02x\n"), |
| 17373 | *input_line_pointer, *input_line_pointer); |
| 17374 | as_warn (_("invalid number")); |
| 17375 | return -1; |
| 17376 | } |
| 17377 | while (ISDIGIT (*input_line_pointer)) |
| 17378 | { |
| 17379 | val *= 10; |
| 17380 | val += *input_line_pointer++ - '0'; |
| 17381 | } |
| 17382 | return negative ? -val : val; |
| 17383 | } |
| 17384 | |
| 17385 | /* The .file directive; just like the usual .file directive, but there |
| 17386 | is an initial number which is the ECOFF file index. In the non-ECOFF |
| 17387 | case .file implies DWARF-2. */ |
| 17388 | |
| 17389 | static void |
| 17390 | s_mips_file (int x ATTRIBUTE_UNUSED) |
| 17391 | { |
| 17392 | static int first_file_directive = 0; |
| 17393 | |
| 17394 | if (ECOFF_DEBUGGING) |
| 17395 | { |
| 17396 | get_number (); |
| 17397 | s_app_file (0); |
| 17398 | } |
| 17399 | else |
| 17400 | { |
| 17401 | char *filename; |
| 17402 | |
| 17403 | filename = dwarf2_directive_file (0); |
| 17404 | |
| 17405 | /* Versions of GCC up to 3.1 start files with a ".file" |
| 17406 | directive even for stabs output. Make sure that this |
| 17407 | ".file" is handled. Note that you need a version of GCC |
| 17408 | after 3.1 in order to support DWARF-2 on MIPS. */ |
| 17409 | if (filename != NULL && ! first_file_directive) |
| 17410 | { |
| 17411 | (void) new_logical_line (filename, -1); |
| 17412 | s_app_file_string (filename, 0); |
| 17413 | } |
| 17414 | first_file_directive = 1; |
| 17415 | } |
| 17416 | } |
| 17417 | |
| 17418 | /* The .loc directive, implying DWARF-2. */ |
| 17419 | |
| 17420 | static void |
| 17421 | s_mips_loc (int x ATTRIBUTE_UNUSED) |
| 17422 | { |
| 17423 | if (!ECOFF_DEBUGGING) |
| 17424 | dwarf2_directive_loc (0); |
| 17425 | } |
| 17426 | |
| 17427 | /* The .end directive. */ |
| 17428 | |
| 17429 | static void |
| 17430 | s_mips_end (int x ATTRIBUTE_UNUSED) |
| 17431 | { |
| 17432 | symbolS *p; |
| 17433 | |
| 17434 | /* Following functions need their own .frame and .cprestore directives. */ |
| 17435 | mips_frame_reg_valid = 0; |
| 17436 | mips_cprestore_valid = 0; |
| 17437 | |
| 17438 | if (!is_end_of_line[(unsigned char) *input_line_pointer]) |
| 17439 | { |
| 17440 | p = get_symbol (); |
| 17441 | demand_empty_rest_of_line (); |
| 17442 | } |
| 17443 | else |
| 17444 | p = NULL; |
| 17445 | |
| 17446 | if ((bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE) == 0) |
| 17447 | as_warn (_(".end not in text section")); |
| 17448 | |
| 17449 | if (!cur_proc_ptr) |
| 17450 | { |
| 17451 | as_warn (_(".end directive without a preceding .ent directive")); |
| 17452 | demand_empty_rest_of_line (); |
| 17453 | return; |
| 17454 | } |
| 17455 | |
| 17456 | if (p != NULL) |
| 17457 | { |
| 17458 | gas_assert (S_GET_NAME (p)); |
| 17459 | if (strcmp (S_GET_NAME (p), S_GET_NAME (cur_proc_ptr->func_sym))) |
| 17460 | as_warn (_(".end symbol does not match .ent symbol")); |
| 17461 | |
| 17462 | if (debug_type == DEBUG_STABS) |
| 17463 | stabs_generate_asm_endfunc (S_GET_NAME (p), |
| 17464 | S_GET_NAME (p)); |
| 17465 | } |
| 17466 | else |
| 17467 | as_warn (_(".end directive missing or unknown symbol")); |
| 17468 | |
| 17469 | /* Create an expression to calculate the size of the function. */ |
| 17470 | if (p && cur_proc_ptr) |
| 17471 | { |
| 17472 | OBJ_SYMFIELD_TYPE *obj = symbol_get_obj (p); |
| 17473 | expressionS *exp = xmalloc (sizeof (expressionS)); |
| 17474 | |
| 17475 | obj->size = exp; |
| 17476 | exp->X_op = O_subtract; |
| 17477 | exp->X_add_symbol = symbol_temp_new_now (); |
| 17478 | exp->X_op_symbol = p; |
| 17479 | exp->X_add_number = 0; |
| 17480 | |
| 17481 | cur_proc_ptr->func_end_sym = exp->X_add_symbol; |
| 17482 | } |
| 17483 | |
| 17484 | /* Generate a .pdr section. */ |
| 17485 | if (!ECOFF_DEBUGGING && mips_flag_pdr) |
| 17486 | { |
| 17487 | segT saved_seg = now_seg; |
| 17488 | subsegT saved_subseg = now_subseg; |
| 17489 | expressionS exp; |
| 17490 | char *fragp; |
| 17491 | |
| 17492 | #ifdef md_flush_pending_output |
| 17493 | md_flush_pending_output (); |
| 17494 | #endif |
| 17495 | |
| 17496 | gas_assert (pdr_seg); |
| 17497 | subseg_set (pdr_seg, 0); |
| 17498 | |
| 17499 | /* Write the symbol. */ |
| 17500 | exp.X_op = O_symbol; |
| 17501 | exp.X_add_symbol = p; |
| 17502 | exp.X_add_number = 0; |
| 17503 | emit_expr (&exp, 4); |
| 17504 | |
| 17505 | fragp = frag_more (7 * 4); |
| 17506 | |
| 17507 | md_number_to_chars (fragp, cur_proc_ptr->reg_mask, 4); |
| 17508 | md_number_to_chars (fragp + 4, cur_proc_ptr->reg_offset, 4); |
| 17509 | md_number_to_chars (fragp + 8, cur_proc_ptr->fpreg_mask, 4); |
| 17510 | md_number_to_chars (fragp + 12, cur_proc_ptr->fpreg_offset, 4); |
| 17511 | md_number_to_chars (fragp + 16, cur_proc_ptr->frame_offset, 4); |
| 17512 | md_number_to_chars (fragp + 20, cur_proc_ptr->frame_reg, 4); |
| 17513 | md_number_to_chars (fragp + 24, cur_proc_ptr->pc_reg, 4); |
| 17514 | |
| 17515 | subseg_set (saved_seg, saved_subseg); |
| 17516 | } |
| 17517 | |
| 17518 | cur_proc_ptr = NULL; |
| 17519 | } |
| 17520 | |
| 17521 | /* The .aent and .ent directives. */ |
| 17522 | |
| 17523 | static void |
| 17524 | s_mips_ent (int aent) |
| 17525 | { |
| 17526 | symbolS *symbolP; |
| 17527 | |
| 17528 | symbolP = get_symbol (); |
| 17529 | if (*input_line_pointer == ',') |
| 17530 | ++input_line_pointer; |
| 17531 | SKIP_WHITESPACE (); |
| 17532 | if (ISDIGIT (*input_line_pointer) |
| 17533 | || *input_line_pointer == '-') |
| 17534 | get_number (); |
| 17535 | |
| 17536 | if ((bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE) == 0) |
| 17537 | as_warn (_(".ent or .aent not in text section")); |
| 17538 | |
| 17539 | if (!aent && cur_proc_ptr) |
| 17540 | as_warn (_("missing .end")); |
| 17541 | |
| 17542 | if (!aent) |
| 17543 | { |
| 17544 | /* This function needs its own .frame and .cprestore directives. */ |
| 17545 | mips_frame_reg_valid = 0; |
| 17546 | mips_cprestore_valid = 0; |
| 17547 | |
| 17548 | cur_proc_ptr = &cur_proc; |
| 17549 | memset (cur_proc_ptr, '\0', sizeof (procS)); |
| 17550 | |
| 17551 | cur_proc_ptr->func_sym = symbolP; |
| 17552 | |
| 17553 | ++numprocs; |
| 17554 | |
| 17555 | if (debug_type == DEBUG_STABS) |
| 17556 | stabs_generate_asm_func (S_GET_NAME (symbolP), |
| 17557 | S_GET_NAME (symbolP)); |
| 17558 | } |
| 17559 | |
| 17560 | symbol_get_bfdsym (symbolP)->flags |= BSF_FUNCTION; |
| 17561 | |
| 17562 | demand_empty_rest_of_line (); |
| 17563 | } |
| 17564 | |
| 17565 | /* The .frame directive. If the mdebug section is present (IRIX 5 native) |
| 17566 | then ecoff.c (ecoff_directive_frame) is used. For embedded targets, |
| 17567 | s_mips_frame is used so that we can set the PDR information correctly. |
| 17568 | We can't use the ecoff routines because they make reference to the ecoff |
| 17569 | symbol table (in the mdebug section). */ |
| 17570 | |
| 17571 | static void |
| 17572 | s_mips_frame (int ignore ATTRIBUTE_UNUSED) |
| 17573 | { |
| 17574 | if (ECOFF_DEBUGGING) |
| 17575 | s_ignore (ignore); |
| 17576 | else |
| 17577 | { |
| 17578 | long val; |
| 17579 | |
| 17580 | if (cur_proc_ptr == (procS *) NULL) |
| 17581 | { |
| 17582 | as_warn (_(".frame outside of .ent")); |
| 17583 | demand_empty_rest_of_line (); |
| 17584 | return; |
| 17585 | } |
| 17586 | |
| 17587 | cur_proc_ptr->frame_reg = tc_get_register (1); |
| 17588 | |
| 17589 | SKIP_WHITESPACE (); |
| 17590 | if (*input_line_pointer++ != ',' |
| 17591 | || get_absolute_expression_and_terminator (&val) != ',') |
| 17592 | { |
| 17593 | as_warn (_("bad .frame directive")); |
| 17594 | --input_line_pointer; |
| 17595 | demand_empty_rest_of_line (); |
| 17596 | return; |
| 17597 | } |
| 17598 | |
| 17599 | cur_proc_ptr->frame_offset = val; |
| 17600 | cur_proc_ptr->pc_reg = tc_get_register (0); |
| 17601 | |
| 17602 | demand_empty_rest_of_line (); |
| 17603 | } |
| 17604 | } |
| 17605 | |
| 17606 | /* The .fmask and .mask directives. If the mdebug section is present |
| 17607 | (IRIX 5 native) then ecoff.c (ecoff_directive_mask) is used. For |
| 17608 | embedded targets, s_mips_mask is used so that we can set the PDR |
| 17609 | information correctly. We can't use the ecoff routines because they |
| 17610 | make reference to the ecoff symbol table (in the mdebug section). */ |
| 17611 | |
| 17612 | static void |
| 17613 | s_mips_mask (int reg_type) |
| 17614 | { |
| 17615 | if (ECOFF_DEBUGGING) |
| 17616 | s_ignore (reg_type); |
| 17617 | else |
| 17618 | { |
| 17619 | long mask, off; |
| 17620 | |
| 17621 | if (cur_proc_ptr == (procS *) NULL) |
| 17622 | { |
| 17623 | as_warn (_(".mask/.fmask outside of .ent")); |
| 17624 | demand_empty_rest_of_line (); |
| 17625 | return; |
| 17626 | } |
| 17627 | |
| 17628 | if (get_absolute_expression_and_terminator (&mask) != ',') |
| 17629 | { |
| 17630 | as_warn (_("bad .mask/.fmask directive")); |
| 17631 | --input_line_pointer; |
| 17632 | demand_empty_rest_of_line (); |
| 17633 | return; |
| 17634 | } |
| 17635 | |
| 17636 | off = get_absolute_expression (); |
| 17637 | |
| 17638 | if (reg_type == 'F') |
| 17639 | { |
| 17640 | cur_proc_ptr->fpreg_mask = mask; |
| 17641 | cur_proc_ptr->fpreg_offset = off; |
| 17642 | } |
| 17643 | else |
| 17644 | { |
| 17645 | cur_proc_ptr->reg_mask = mask; |
| 17646 | cur_proc_ptr->reg_offset = off; |
| 17647 | } |
| 17648 | |
| 17649 | demand_empty_rest_of_line (); |
| 17650 | } |
| 17651 | } |
| 17652 | |
| 17653 | /* A table describing all the processors gas knows about. Names are |
| 17654 | matched in the order listed. |
| 17655 | |
| 17656 | To ease comparison, please keep this table in the same order as |
| 17657 | gcc's mips_cpu_info_table[]. */ |
| 17658 | static const struct mips_cpu_info mips_cpu_info_table[] = |
| 17659 | { |
| 17660 | /* Entries for generic ISAs */ |
| 17661 | { "mips1", MIPS_CPU_IS_ISA, 0, ISA_MIPS1, CPU_R3000 }, |
| 17662 | { "mips2", MIPS_CPU_IS_ISA, 0, ISA_MIPS2, CPU_R6000 }, |
| 17663 | { "mips3", MIPS_CPU_IS_ISA, 0, ISA_MIPS3, CPU_R4000 }, |
| 17664 | { "mips4", MIPS_CPU_IS_ISA, 0, ISA_MIPS4, CPU_R8000 }, |
| 17665 | { "mips5", MIPS_CPU_IS_ISA, 0, ISA_MIPS5, CPU_MIPS5 }, |
| 17666 | { "mips32", MIPS_CPU_IS_ISA, 0, ISA_MIPS32, CPU_MIPS32 }, |
| 17667 | { "mips32r2", MIPS_CPU_IS_ISA, 0, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17668 | { "mips64", MIPS_CPU_IS_ISA, 0, ISA_MIPS64, CPU_MIPS64 }, |
| 17669 | { "mips64r2", MIPS_CPU_IS_ISA, 0, ISA_MIPS64R2, CPU_MIPS64R2 }, |
| 17670 | |
| 17671 | /* MIPS I */ |
| 17672 | { "r3000", 0, 0, ISA_MIPS1, CPU_R3000 }, |
| 17673 | { "r2000", 0, 0, ISA_MIPS1, CPU_R3000 }, |
| 17674 | { "r3900", 0, 0, ISA_MIPS1, CPU_R3900 }, |
| 17675 | |
| 17676 | /* MIPS II */ |
| 17677 | { "r6000", 0, 0, ISA_MIPS2, CPU_R6000 }, |
| 17678 | |
| 17679 | /* MIPS III */ |
| 17680 | { "r4000", 0, 0, ISA_MIPS3, CPU_R4000 }, |
| 17681 | { "r4010", 0, 0, ISA_MIPS2, CPU_R4010 }, |
| 17682 | { "vr4100", 0, 0, ISA_MIPS3, CPU_VR4100 }, |
| 17683 | { "vr4111", 0, 0, ISA_MIPS3, CPU_R4111 }, |
| 17684 | { "vr4120", 0, 0, ISA_MIPS3, CPU_VR4120 }, |
| 17685 | { "vr4130", 0, 0, ISA_MIPS3, CPU_VR4120 }, |
| 17686 | { "vr4181", 0, 0, ISA_MIPS3, CPU_R4111 }, |
| 17687 | { "vr4300", 0, 0, ISA_MIPS3, CPU_R4300 }, |
| 17688 | { "r4400", 0, 0, ISA_MIPS3, CPU_R4400 }, |
| 17689 | { "r4600", 0, 0, ISA_MIPS3, CPU_R4600 }, |
| 17690 | { "orion", 0, 0, ISA_MIPS3, CPU_R4600 }, |
| 17691 | { "r4650", 0, 0, ISA_MIPS3, CPU_R4650 }, |
| 17692 | { "r5900", 0, 0, ISA_MIPS3, CPU_R5900 }, |
| 17693 | /* ST Microelectronics Loongson 2E and 2F cores */ |
| 17694 | { "loongson2e", 0, 0, ISA_MIPS3, CPU_LOONGSON_2E }, |
| 17695 | { "loongson2f", 0, 0, ISA_MIPS3, CPU_LOONGSON_2F }, |
| 17696 | |
| 17697 | /* MIPS IV */ |
| 17698 | { "r8000", 0, 0, ISA_MIPS4, CPU_R8000 }, |
| 17699 | { "r10000", 0, 0, ISA_MIPS4, CPU_R10000 }, |
| 17700 | { "r12000", 0, 0, ISA_MIPS4, CPU_R12000 }, |
| 17701 | { "r14000", 0, 0, ISA_MIPS4, CPU_R14000 }, |
| 17702 | { "r16000", 0, 0, ISA_MIPS4, CPU_R16000 }, |
| 17703 | { "vr5000", 0, 0, ISA_MIPS4, CPU_R5000 }, |
| 17704 | { "vr5400", 0, 0, ISA_MIPS4, CPU_VR5400 }, |
| 17705 | { "vr5500", 0, 0, ISA_MIPS4, CPU_VR5500 }, |
| 17706 | { "rm5200", 0, 0, ISA_MIPS4, CPU_R5000 }, |
| 17707 | { "rm5230", 0, 0, ISA_MIPS4, CPU_R5000 }, |
| 17708 | { "rm5231", 0, 0, ISA_MIPS4, CPU_R5000 }, |
| 17709 | { "rm5261", 0, 0, ISA_MIPS4, CPU_R5000 }, |
| 17710 | { "rm5721", 0, 0, ISA_MIPS4, CPU_R5000 }, |
| 17711 | { "rm7000", 0, 0, ISA_MIPS4, CPU_RM7000 }, |
| 17712 | { "rm9000", 0, 0, ISA_MIPS4, CPU_RM9000 }, |
| 17713 | |
| 17714 | /* MIPS 32 */ |
| 17715 | { "4kc", 0, 0, ISA_MIPS32, CPU_MIPS32 }, |
| 17716 | { "4km", 0, 0, ISA_MIPS32, CPU_MIPS32 }, |
| 17717 | { "4kp", 0, 0, ISA_MIPS32, CPU_MIPS32 }, |
| 17718 | { "4ksc", 0, ASE_SMARTMIPS, ISA_MIPS32, CPU_MIPS32 }, |
| 17719 | |
| 17720 | /* MIPS 32 Release 2 */ |
| 17721 | { "4kec", 0, 0, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17722 | { "4kem", 0, 0, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17723 | { "4kep", 0, 0, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17724 | { "4ksd", 0, ASE_SMARTMIPS, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17725 | { "m4k", 0, 0, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17726 | { "m4kp", 0, 0, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17727 | { "m14k", 0, ASE_MCU, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17728 | { "m14kc", 0, ASE_MCU, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17729 | { "m14ke", 0, ASE_DSP | ASE_DSPR2 | ASE_MCU, |
| 17730 | ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17731 | { "m14kec", 0, ASE_DSP | ASE_DSPR2 | ASE_MCU, |
| 17732 | ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17733 | { "24kc", 0, 0, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17734 | { "24kf2_1", 0, 0, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17735 | { "24kf", 0, 0, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17736 | { "24kf1_1", 0, 0, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17737 | /* Deprecated forms of the above. */ |
| 17738 | { "24kfx", 0, 0, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17739 | { "24kx", 0, 0, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17740 | /* 24KE is a 24K with DSP ASE, other ASEs are optional. */ |
| 17741 | { "24kec", 0, ASE_DSP, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17742 | { "24kef2_1", 0, ASE_DSP, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17743 | { "24kef", 0, ASE_DSP, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17744 | { "24kef1_1", 0, ASE_DSP, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17745 | /* Deprecated forms of the above. */ |
| 17746 | { "24kefx", 0, ASE_DSP, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17747 | { "24kex", 0, ASE_DSP, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17748 | /* 34K is a 24K with DSP and MT ASE, other ASEs are optional. */ |
| 17749 | { "34kc", 0, ASE_DSP | ASE_MT, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17750 | { "34kf2_1", 0, ASE_DSP | ASE_MT, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17751 | { "34kf", 0, ASE_DSP | ASE_MT, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17752 | { "34kf1_1", 0, ASE_DSP | ASE_MT, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17753 | /* Deprecated forms of the above. */ |
| 17754 | { "34kfx", 0, ASE_DSP | ASE_MT, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17755 | { "34kx", 0, ASE_DSP | ASE_MT, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17756 | /* 34Kn is a 34kc without DSP. */ |
| 17757 | { "34kn", 0, ASE_MT, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17758 | /* 74K with DSP and DSPR2 ASE, other ASEs are optional. */ |
| 17759 | { "74kc", 0, ASE_DSP | ASE_DSPR2, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17760 | { "74kf2_1", 0, ASE_DSP | ASE_DSPR2, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17761 | { "74kf", 0, ASE_DSP | ASE_DSPR2, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17762 | { "74kf1_1", 0, ASE_DSP | ASE_DSPR2, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17763 | { "74kf3_2", 0, ASE_DSP | ASE_DSPR2, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17764 | /* Deprecated forms of the above. */ |
| 17765 | { "74kfx", 0, ASE_DSP | ASE_DSPR2, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17766 | { "74kx", 0, ASE_DSP | ASE_DSPR2, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17767 | /* 1004K cores are multiprocessor versions of the 34K. */ |
| 17768 | { "1004kc", 0, ASE_DSP | ASE_MT, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17769 | { "1004kf2_1", 0, ASE_DSP | ASE_MT, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17770 | { "1004kf", 0, ASE_DSP | ASE_MT, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17771 | { "1004kf1_1", 0, ASE_DSP | ASE_MT, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 17772 | |
| 17773 | /* MIPS 64 */ |
| 17774 | { "5kc", 0, 0, ISA_MIPS64, CPU_MIPS64 }, |
| 17775 | { "5kf", 0, 0, ISA_MIPS64, CPU_MIPS64 }, |
| 17776 | { "20kc", 0, ASE_MIPS3D, ISA_MIPS64, CPU_MIPS64 }, |
| 17777 | { "25kf", 0, ASE_MIPS3D, ISA_MIPS64, CPU_MIPS64 }, |
| 17778 | |
| 17779 | /* Broadcom SB-1 CPU core */ |
| 17780 | { "sb1", 0, ASE_MIPS3D | ASE_MDMX, ISA_MIPS64, CPU_SB1 }, |
| 17781 | /* Broadcom SB-1A CPU core */ |
| 17782 | { "sb1a", 0, ASE_MIPS3D | ASE_MDMX, ISA_MIPS64, CPU_SB1 }, |
| 17783 | |
| 17784 | { "loongson3a", 0, 0, ISA_MIPS64, CPU_LOONGSON_3A }, |
| 17785 | |
| 17786 | /* MIPS 64 Release 2 */ |
| 17787 | |
| 17788 | /* Cavium Networks Octeon CPU core */ |
| 17789 | { "octeon", 0, 0, ISA_MIPS64R2, CPU_OCTEON }, |
| 17790 | { "octeon+", 0, 0, ISA_MIPS64R2, CPU_OCTEONP }, |
| 17791 | { "octeon2", 0, 0, ISA_MIPS64R2, CPU_OCTEON2 }, |
| 17792 | |
| 17793 | /* RMI Xlr */ |
| 17794 | { "xlr", 0, 0, ISA_MIPS64, CPU_XLR }, |
| 17795 | |
| 17796 | /* Broadcom XLP. |
| 17797 | XLP is mostly like XLR, with the prominent exception that it is |
| 17798 | MIPS64R2 rather than MIPS64. */ |
| 17799 | { "xlp", 0, 0, ISA_MIPS64R2, CPU_XLR }, |
| 17800 | |
| 17801 | /* End marker */ |
| 17802 | { NULL, 0, 0, 0, 0 } |
| 17803 | }; |
| 17804 | |
| 17805 | |
| 17806 | /* Return true if GIVEN is the same as CANONICAL, or if it is CANONICAL |
| 17807 | with a final "000" replaced by "k". Ignore case. |
| 17808 | |
| 17809 | Note: this function is shared between GCC and GAS. */ |
| 17810 | |
| 17811 | static bfd_boolean |
| 17812 | mips_strict_matching_cpu_name_p (const char *canonical, const char *given) |
| 17813 | { |
| 17814 | while (*given != 0 && TOLOWER (*given) == TOLOWER (*canonical)) |
| 17815 | given++, canonical++; |
| 17816 | |
| 17817 | return ((*given == 0 && *canonical == 0) |
| 17818 | || (strcmp (canonical, "000") == 0 && strcasecmp (given, "k") == 0)); |
| 17819 | } |
| 17820 | |
| 17821 | |
| 17822 | /* Return true if GIVEN matches CANONICAL, where GIVEN is a user-supplied |
| 17823 | CPU name. We've traditionally allowed a lot of variation here. |
| 17824 | |
| 17825 | Note: this function is shared between GCC and GAS. */ |
| 17826 | |
| 17827 | static bfd_boolean |
| 17828 | mips_matching_cpu_name_p (const char *canonical, const char *given) |
| 17829 | { |
| 17830 | /* First see if the name matches exactly, or with a final "000" |
| 17831 | turned into "k". */ |
| 17832 | if (mips_strict_matching_cpu_name_p (canonical, given)) |
| 17833 | return TRUE; |
| 17834 | |
| 17835 | /* If not, try comparing based on numerical designation alone. |
| 17836 | See if GIVEN is an unadorned number, or 'r' followed by a number. */ |
| 17837 | if (TOLOWER (*given) == 'r') |
| 17838 | given++; |
| 17839 | if (!ISDIGIT (*given)) |
| 17840 | return FALSE; |
| 17841 | |
| 17842 | /* Skip over some well-known prefixes in the canonical name, |
| 17843 | hoping to find a number there too. */ |
| 17844 | if (TOLOWER (canonical[0]) == 'v' && TOLOWER (canonical[1]) == 'r') |
| 17845 | canonical += 2; |
| 17846 | else if (TOLOWER (canonical[0]) == 'r' && TOLOWER (canonical[1]) == 'm') |
| 17847 | canonical += 2; |
| 17848 | else if (TOLOWER (canonical[0]) == 'r') |
| 17849 | canonical += 1; |
| 17850 | |
| 17851 | return mips_strict_matching_cpu_name_p (canonical, given); |
| 17852 | } |
| 17853 | |
| 17854 | |
| 17855 | /* Parse an option that takes the name of a processor as its argument. |
| 17856 | OPTION is the name of the option and CPU_STRING is the argument. |
| 17857 | Return the corresponding processor enumeration if the CPU_STRING is |
| 17858 | recognized, otherwise report an error and return null. |
| 17859 | |
| 17860 | A similar function exists in GCC. */ |
| 17861 | |
| 17862 | static const struct mips_cpu_info * |
| 17863 | mips_parse_cpu (const char *option, const char *cpu_string) |
| 17864 | { |
| 17865 | const struct mips_cpu_info *p; |
| 17866 | |
| 17867 | /* 'from-abi' selects the most compatible architecture for the given |
| 17868 | ABI: MIPS I for 32-bit ABIs and MIPS III for 64-bit ABIs. For the |
| 17869 | EABIs, we have to decide whether we're using the 32-bit or 64-bit |
| 17870 | version. Look first at the -mgp options, if given, otherwise base |
| 17871 | the choice on MIPS_DEFAULT_64BIT. |
| 17872 | |
| 17873 | Treat NO_ABI like the EABIs. One reason to do this is that the |
| 17874 | plain 'mips' and 'mips64' configs have 'from-abi' as their default |
| 17875 | architecture. This code picks MIPS I for 'mips' and MIPS III for |
| 17876 | 'mips64', just as we did in the days before 'from-abi'. */ |
| 17877 | if (strcasecmp (cpu_string, "from-abi") == 0) |
| 17878 | { |
| 17879 | if (ABI_NEEDS_32BIT_REGS (mips_abi)) |
| 17880 | return mips_cpu_info_from_isa (ISA_MIPS1); |
| 17881 | |
| 17882 | if (ABI_NEEDS_64BIT_REGS (mips_abi)) |
| 17883 | return mips_cpu_info_from_isa (ISA_MIPS3); |
| 17884 | |
| 17885 | if (file_mips_gp32 >= 0) |
| 17886 | return mips_cpu_info_from_isa (file_mips_gp32 ? ISA_MIPS1 : ISA_MIPS3); |
| 17887 | |
| 17888 | return mips_cpu_info_from_isa (MIPS_DEFAULT_64BIT |
| 17889 | ? ISA_MIPS3 |
| 17890 | : ISA_MIPS1); |
| 17891 | } |
| 17892 | |
| 17893 | /* 'default' has traditionally been a no-op. Probably not very useful. */ |
| 17894 | if (strcasecmp (cpu_string, "default") == 0) |
| 17895 | return 0; |
| 17896 | |
| 17897 | for (p = mips_cpu_info_table; p->name != 0; p++) |
| 17898 | if (mips_matching_cpu_name_p (p->name, cpu_string)) |
| 17899 | return p; |
| 17900 | |
| 17901 | as_bad (_("bad value (%s) for %s"), cpu_string, option); |
| 17902 | return 0; |
| 17903 | } |
| 17904 | |
| 17905 | /* Return the canonical processor information for ISA (a member of the |
| 17906 | ISA_MIPS* enumeration). */ |
| 17907 | |
| 17908 | static const struct mips_cpu_info * |
| 17909 | mips_cpu_info_from_isa (int isa) |
| 17910 | { |
| 17911 | int i; |
| 17912 | |
| 17913 | for (i = 0; mips_cpu_info_table[i].name != NULL; i++) |
| 17914 | if ((mips_cpu_info_table[i].flags & MIPS_CPU_IS_ISA) |
| 17915 | && isa == mips_cpu_info_table[i].isa) |
| 17916 | return (&mips_cpu_info_table[i]); |
| 17917 | |
| 17918 | return NULL; |
| 17919 | } |
| 17920 | |
| 17921 | static const struct mips_cpu_info * |
| 17922 | mips_cpu_info_from_arch (int arch) |
| 17923 | { |
| 17924 | int i; |
| 17925 | |
| 17926 | for (i = 0; mips_cpu_info_table[i].name != NULL; i++) |
| 17927 | if (arch == mips_cpu_info_table[i].cpu) |
| 17928 | return (&mips_cpu_info_table[i]); |
| 17929 | |
| 17930 | return NULL; |
| 17931 | } |
| 17932 | \f |
| 17933 | static void |
| 17934 | show (FILE *stream, const char *string, int *col_p, int *first_p) |
| 17935 | { |
| 17936 | if (*first_p) |
| 17937 | { |
| 17938 | fprintf (stream, "%24s", ""); |
| 17939 | *col_p = 24; |
| 17940 | } |
| 17941 | else |
| 17942 | { |
| 17943 | fprintf (stream, ", "); |
| 17944 | *col_p += 2; |
| 17945 | } |
| 17946 | |
| 17947 | if (*col_p + strlen (string) > 72) |
| 17948 | { |
| 17949 | fprintf (stream, "\n%24s", ""); |
| 17950 | *col_p = 24; |
| 17951 | } |
| 17952 | |
| 17953 | fprintf (stream, "%s", string); |
| 17954 | *col_p += strlen (string); |
| 17955 | |
| 17956 | *first_p = 0; |
| 17957 | } |
| 17958 | |
| 17959 | void |
| 17960 | md_show_usage (FILE *stream) |
| 17961 | { |
| 17962 | int column, first; |
| 17963 | size_t i; |
| 17964 | |
| 17965 | fprintf (stream, _("\ |
| 17966 | MIPS options:\n\ |
| 17967 | -EB generate big endian output\n\ |
| 17968 | -EL generate little endian output\n\ |
| 17969 | -g, -g2 do not remove unneeded NOPs or swap branches\n\ |
| 17970 | -G NUM allow referencing objects up to NUM bytes\n\ |
| 17971 | implicitly with the gp register [default 8]\n")); |
| 17972 | fprintf (stream, _("\ |
| 17973 | -mips1 generate MIPS ISA I instructions\n\ |
| 17974 | -mips2 generate MIPS ISA II instructions\n\ |
| 17975 | -mips3 generate MIPS ISA III instructions\n\ |
| 17976 | -mips4 generate MIPS ISA IV instructions\n\ |
| 17977 | -mips5 generate MIPS ISA V instructions\n\ |
| 17978 | -mips32 generate MIPS32 ISA instructions\n\ |
| 17979 | -mips32r2 generate MIPS32 release 2 ISA instructions\n\ |
| 17980 | -mips64 generate MIPS64 ISA instructions\n\ |
| 17981 | -mips64r2 generate MIPS64 release 2 ISA instructions\n\ |
| 17982 | -march=CPU/-mtune=CPU generate code/schedule for CPU, where CPU is one of:\n")); |
| 17983 | |
| 17984 | first = 1; |
| 17985 | |
| 17986 | for (i = 0; mips_cpu_info_table[i].name != NULL; i++) |
| 17987 | show (stream, mips_cpu_info_table[i].name, &column, &first); |
| 17988 | show (stream, "from-abi", &column, &first); |
| 17989 | fputc ('\n', stream); |
| 17990 | |
| 17991 | fprintf (stream, _("\ |
| 17992 | -mCPU equivalent to -march=CPU -mtune=CPU. Deprecated.\n\ |
| 17993 | -no-mCPU don't generate code specific to CPU.\n\ |
| 17994 | For -mCPU and -no-mCPU, CPU must be one of:\n")); |
| 17995 | |
| 17996 | first = 1; |
| 17997 | |
| 17998 | show (stream, "3900", &column, &first); |
| 17999 | show (stream, "4010", &column, &first); |
| 18000 | show (stream, "4100", &column, &first); |
| 18001 | show (stream, "4650", &column, &first); |
| 18002 | fputc ('\n', stream); |
| 18003 | |
| 18004 | fprintf (stream, _("\ |
| 18005 | -mips16 generate mips16 instructions\n\ |
| 18006 | -no-mips16 do not generate mips16 instructions\n")); |
| 18007 | fprintf (stream, _("\ |
| 18008 | -mmicromips generate microMIPS instructions\n\ |
| 18009 | -mno-micromips do not generate microMIPS instructions\n")); |
| 18010 | fprintf (stream, _("\ |
| 18011 | -msmartmips generate smartmips instructions\n\ |
| 18012 | -mno-smartmips do not generate smartmips instructions\n")); |
| 18013 | fprintf (stream, _("\ |
| 18014 | -mdsp generate DSP instructions\n\ |
| 18015 | -mno-dsp do not generate DSP instructions\n")); |
| 18016 | fprintf (stream, _("\ |
| 18017 | -mdspr2 generate DSP R2 instructions\n\ |
| 18018 | -mno-dspr2 do not generate DSP R2 instructions\n")); |
| 18019 | fprintf (stream, _("\ |
| 18020 | -mmt generate MT instructions\n\ |
| 18021 | -mno-mt do not generate MT instructions\n")); |
| 18022 | fprintf (stream, _("\ |
| 18023 | -mmcu generate MCU instructions\n\ |
| 18024 | -mno-mcu do not generate MCU instructions\n")); |
| 18025 | fprintf (stream, _("\ |
| 18026 | -mvirt generate Virtualization instructions\n\ |
| 18027 | -mno-virt do not generate Virtualization instructions\n")); |
| 18028 | fprintf (stream, _("\ |
| 18029 | -minsn32 only generate 32-bit microMIPS instructions\n\ |
| 18030 | -mno-insn32 generate all microMIPS instructions\n")); |
| 18031 | fprintf (stream, _("\ |
| 18032 | -mfix-loongson2f-jump work around Loongson2F JUMP instructions\n\ |
| 18033 | -mfix-loongson2f-nop work around Loongson2F NOP errata\n\ |
| 18034 | -mfix-vr4120 work around certain VR4120 errata\n\ |
| 18035 | -mfix-vr4130 work around VR4130 mflo/mfhi errata\n\ |
| 18036 | -mfix-24k insert a nop after ERET and DERET instructions\n\ |
| 18037 | -mfix-cn63xxp1 work around CN63XXP1 PREF errata\n\ |
| 18038 | -mgp32 use 32-bit GPRs, regardless of the chosen ISA\n\ |
| 18039 | -mfp32 use 32-bit FPRs, regardless of the chosen ISA\n\ |
| 18040 | -msym32 assume all symbols have 32-bit values\n\ |
| 18041 | -O0 remove unneeded NOPs, do not swap branches\n\ |
| 18042 | -O remove unneeded NOPs and swap branches\n\ |
| 18043 | --trap, --no-break trap exception on div by 0 and mult overflow\n\ |
| 18044 | --break, --no-trap break exception on div by 0 and mult overflow\n")); |
| 18045 | fprintf (stream, _("\ |
| 18046 | -mhard-float allow floating-point instructions\n\ |
| 18047 | -msoft-float do not allow floating-point instructions\n\ |
| 18048 | -msingle-float only allow 32-bit floating-point operations\n\ |
| 18049 | -mdouble-float allow 32-bit and 64-bit floating-point operations\n\ |
| 18050 | --[no-]construct-floats [dis]allow floating point values to be constructed\n\ |
| 18051 | --[no-]relax-branch [dis]allow out-of-range branches to be relaxed\n\ |
| 18052 | -mnan=ENCODING select an IEEE 754 NaN encoding convention, either of:\n")); |
| 18053 | |
| 18054 | first = 1; |
| 18055 | |
| 18056 | show (stream, "legacy", &column, &first); |
| 18057 | show (stream, "2008", &column, &first); |
| 18058 | |
| 18059 | fputc ('\n', stream); |
| 18060 | |
| 18061 | fprintf (stream, _("\ |
| 18062 | -KPIC, -call_shared generate SVR4 position independent code\n\ |
| 18063 | -call_nonpic generate non-PIC code that can operate with DSOs\n\ |
| 18064 | -mvxworks-pic generate VxWorks position independent code\n\ |
| 18065 | -non_shared do not generate code that can operate with DSOs\n\ |
| 18066 | -xgot assume a 32 bit GOT\n\ |
| 18067 | -mpdr, -mno-pdr enable/disable creation of .pdr sections\n\ |
| 18068 | -mshared, -mno-shared disable/enable .cpload optimization for\n\ |
| 18069 | position dependent (non shared) code\n\ |
| 18070 | -mabi=ABI create ABI conformant object file for:\n")); |
| 18071 | |
| 18072 | first = 1; |
| 18073 | |
| 18074 | show (stream, "32", &column, &first); |
| 18075 | show (stream, "o64", &column, &first); |
| 18076 | show (stream, "n32", &column, &first); |
| 18077 | show (stream, "64", &column, &first); |
| 18078 | show (stream, "eabi", &column, &first); |
| 18079 | |
| 18080 | fputc ('\n', stream); |
| 18081 | |
| 18082 | fprintf (stream, _("\ |
| 18083 | -32 create o32 ABI object file (default)\n\ |
| 18084 | -n32 create n32 ABI object file\n\ |
| 18085 | -64 create 64 ABI object file\n")); |
| 18086 | } |
| 18087 | |
| 18088 | #ifdef TE_IRIX |
| 18089 | enum dwarf2_format |
| 18090 | mips_dwarf2_format (asection *sec ATTRIBUTE_UNUSED) |
| 18091 | { |
| 18092 | if (HAVE_64BIT_SYMBOLS) |
| 18093 | return dwarf2_format_64bit_irix; |
| 18094 | else |
| 18095 | return dwarf2_format_32bit; |
| 18096 | } |
| 18097 | #endif |
| 18098 | |
| 18099 | int |
| 18100 | mips_dwarf2_addr_size (void) |
| 18101 | { |
| 18102 | if (HAVE_64BIT_OBJECTS) |
| 18103 | return 8; |
| 18104 | else |
| 18105 | return 4; |
| 18106 | } |
| 18107 | |
| 18108 | /* Standard calling conventions leave the CFA at SP on entry. */ |
| 18109 | void |
| 18110 | mips_cfi_frame_initial_instructions (void) |
| 18111 | { |
| 18112 | cfi_add_CFA_def_cfa_register (SP); |
| 18113 | } |
| 18114 | |
| 18115 | int |
| 18116 | tc_mips_regname_to_dw2regnum (char *regname) |
| 18117 | { |
| 18118 | unsigned int regnum = -1; |
| 18119 | unsigned int reg; |
| 18120 | |
| 18121 | if (reg_lookup (®name, RTYPE_GP | RTYPE_NUM, ®)) |
| 18122 | regnum = reg; |
| 18123 | |
| 18124 | return regnum; |
| 18125 | } |