| 1 | /* tc-xgate.c -- Assembler code for Freescale XGATE |
| 2 | Copyright (C) 2010-2020 Free Software Foundation, Inc. |
| 3 | Contributed by Sean Keys <skeys@ipdatasys.com> |
| 4 | |
| 5 | This file is part of GAS, the GNU Assembler. |
| 6 | |
| 7 | GAS is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GAS is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GAS; see the file COPYING. If not, write to |
| 19 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, |
| 20 | Boston, MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include "as.h" |
| 23 | #include "safe-ctype.h" |
| 24 | #include "subsegs.h" |
| 25 | #include "opcode/xgate.h" |
| 26 | #include "dwarf2dbg.h" |
| 27 | #include "elf/xgate.h" |
| 28 | |
| 29 | const char comment_chars[] = ";!"; |
| 30 | const char line_comment_chars[] = "#*"; |
| 31 | const char line_separator_chars[] = ""; |
| 32 | const char EXP_CHARS[] = "eE"; |
| 33 | const char FLT_CHARS[] = "dD"; |
| 34 | |
| 35 | /* Max opcodes per opcode handle. */ |
| 36 | #define MAX_OPCODES 0x05 |
| 37 | |
| 38 | #define SIXTEENTH_BIT 0x8000 |
| 39 | #define N_BITS_IN_WORD 16 |
| 40 | #define MAX_NUM_OPERANDS 3 |
| 41 | |
| 42 | /* #define STATE_CONDITIONAL_BRANCH (1) */ |
| 43 | #define STATE_PC_RELATIVE (2) |
| 44 | #define REGISTER_P(ptr) (ptr == 'r') |
| 45 | #define INCREMENT 01 |
| 46 | #define DECREMENT 02 |
| 47 | #define MAXREGISTER 07 |
| 48 | #define MINREGISTER 00 |
| 49 | |
| 50 | #define OPTION_MMCU 'm' |
| 51 | |
| 52 | /* This macro has no side-effects. */ |
| 53 | #define ENCODE_RELAX(what,length) (((what) << 2) + (length)) |
| 54 | |
| 55 | /* Each unique opcode name has a handle. That handle may |
| 56 | contain pointers to opcodes with the same name but |
| 57 | different address modes. */ |
| 58 | struct xgate_opcode_handle |
| 59 | { |
| 60 | int number_of_modes; |
| 61 | char *name; |
| 62 | struct xgate_opcode *opc0[MAX_OPCODES]; |
| 63 | }; |
| 64 | |
| 65 | /* XGATE's registers all are 16-bit general purpose. |
| 66 | They are numbered according to the specifications. */ |
| 67 | typedef enum register_id |
| 68 | { |
| 69 | REG_NONE = -1, |
| 70 | REG_R0 = 0, |
| 71 | REG_R1 = 1, |
| 72 | REG_R2 = 2, |
| 73 | REG_R3 = 3, |
| 74 | REG_R4 = 4, |
| 75 | REG_R5 = 5, |
| 76 | REG_R6 = 6, |
| 77 | REG_R7 = 7, |
| 78 | REG_PC = 8, |
| 79 | REG_CCR = 9 |
| 80 | } register_id; |
| 81 | |
| 82 | /* Operand Modifiers */ |
| 83 | typedef enum op_modifiers |
| 84 | { |
| 85 | MOD_NONE = -1, |
| 86 | MOD_POSTINC = 1, |
| 87 | MOD_PREDEC = 2, |
| 88 | MOD_CONSTANT = 3, |
| 89 | MOD_LOAD_HIGH = 4, |
| 90 | MOD_LOAD_LOW = 5 |
| 91 | }op_modifiers; |
| 92 | |
| 93 | typedef struct s_operand |
| 94 | { |
| 95 | expressionS exp; |
| 96 | register_id reg; |
| 97 | op_modifiers mod; |
| 98 | } s_operand; |
| 99 | |
| 100 | |
| 101 | /* Forward declarations. */ |
| 102 | static inline char *skip_whitespace (char *); |
| 103 | static void get_default_target (void); |
| 104 | static char *extract_word (char *, char *, int); |
| 105 | static struct xgate_opcode *xgate_find_match (struct xgate_opcode_handle *, |
| 106 | int, s_operand [], unsigned int); |
| 107 | static int cmp_opcode (struct xgate_opcode *, struct xgate_opcode *); |
| 108 | static void xgate_print_table (void); |
| 109 | static unsigned int xgate_get_operands (char *, s_operand []); |
| 110 | static register_id reg_name_search (char *); |
| 111 | static op_modifiers xgate_determine_modifiers (char **); |
| 112 | static void xgate_scan_operands (struct xgate_opcode *opcode, s_operand []); |
| 113 | static unsigned int xgate_parse_operand (struct xgate_opcode *, int *, int, |
| 114 | char **, s_operand); |
| 115 | |
| 116 | static struct hash_control *xgate_hash; |
| 117 | |
| 118 | /* Previous opcode. */ |
| 119 | static unsigned int prev = 0; |
| 120 | |
| 121 | static unsigned char fixup_required = 0; |
| 122 | |
| 123 | /* Used to enable clipping of 16 bit operands into 8 bit constraints. */ |
| 124 | static unsigned char autoHiLo = 0; |
| 125 | |
| 126 | static char oper_check; |
| 127 | static char flag_print_insn_syntax = 0; |
| 128 | static char flag_print_opcodes = 0; |
| 129 | |
| 130 | static int current_architecture; |
| 131 | static const char *default_cpu; |
| 132 | |
| 133 | /* ELF flags to set in the output file header. */ |
| 134 | static int elf_flags = E_XGATE_F64; |
| 135 | |
| 136 | /* This table describes how you change sizes for the various types of variable |
| 137 | size expressions. This version only supports two kinds. */ |
| 138 | |
| 139 | /* The fields are: |
| 140 | How far Forward this mode will reach. |
| 141 | How far Backward this mode will reach. |
| 142 | How many bytes this mode will add to the size of the frag. |
| 143 | Which mode to go to if the offset won't fit in this one. */ |
| 144 | |
| 145 | relax_typeS md_relax_table[] = |
| 146 | { |
| 147 | {1, 1, 0, 0}, /* First entries aren't used. */ |
| 148 | {1, 1, 0, 0}, /* For no good reason except. */ |
| 149 | {1, 1, 0, 0}, /* that the VAX doesn't either. */ |
| 150 | {1, 1, 0, 0}, |
| 151 | /* XGATE 9 and 10 bit pc rel todo complete and test */ |
| 152 | /*{(511), (-512), 0, ENCODE_RELAX (STATE_PC_RELATIVE, STATE_WORD)}, |
| 153 | {(1023), (-1024), 0, ENCODE_RELAX (STATE_PC_RELATIVE, STATE_WORD)}, */ |
| 154 | {0, 0, 0, 0} |
| 155 | }; |
| 156 | |
| 157 | /* This table describes all the machine specific pseudo-ops the assembler |
| 158 | has to support. The fields are: pseudo-op name without dot function to |
| 159 | call to execute this pseudo-op Integer arg to pass to the function. */ |
| 160 | const pseudo_typeS md_pseudo_table[] = |
| 161 | { |
| 162 | /* The following pseudo-ops are supported for MRI compatibility. */ |
| 163 | {0, 0, 0} |
| 164 | }; |
| 165 | |
| 166 | const char *md_shortopts = "m:"; |
| 167 | |
| 168 | struct option md_longopts[] = |
| 169 | { |
| 170 | #define OPTION_PRINT_INSN_SYNTAX (OPTION_MD_BASE + 0) |
| 171 | { "print-insn-syntax", no_argument, NULL, OPTION_PRINT_INSN_SYNTAX }, |
| 172 | |
| 173 | #define OPTION_PRINT_OPCODES (OPTION_MD_BASE + 1) |
| 174 | { "print-opcodes", no_argument, NULL, OPTION_PRINT_OPCODES }, |
| 175 | |
| 176 | #define OPTION_GENERATE_EXAMPLE (OPTION_MD_BASE + 2) |
| 177 | { "generate-example", no_argument, NULL, OPTION_GENERATE_EXAMPLE }, |
| 178 | |
| 179 | #define OPTION_MSHORT (OPTION_MD_BASE + 3) |
| 180 | { "mshort", no_argument, NULL, OPTION_MSHORT }, |
| 181 | |
| 182 | #define OPTION_MLONG (OPTION_MD_BASE + 4) |
| 183 | { "mlong", no_argument, NULL, OPTION_MLONG }, |
| 184 | |
| 185 | #define OPTION_MSHORT_DOUBLE (OPTION_MD_BASE + 5) |
| 186 | { "mshort-double", no_argument, NULL, OPTION_MSHORT_DOUBLE }, |
| 187 | |
| 188 | #define OPTION_MLONG_DOUBLE (OPTION_MD_BASE + 6) |
| 189 | { "mlong-double", no_argument, NULL, OPTION_MLONG_DOUBLE }, |
| 190 | |
| 191 | { NULL, no_argument, NULL, 0 } |
| 192 | }; |
| 193 | |
| 194 | size_t md_longopts_size = sizeof (md_longopts); |
| 195 | |
| 196 | const char * |
| 197 | md_atof (int type, char *litP, int *sizeP) |
| 198 | { |
| 199 | return ieee_md_atof (type, litP, sizeP, TRUE); |
| 200 | } |
| 201 | |
| 202 | int |
| 203 | md_parse_option (int c, const char *arg) |
| 204 | { |
| 205 | switch (c) |
| 206 | { |
| 207 | case OPTION_MMCU: |
| 208 | if (strcasecmp (arg, "v1") == 0) |
| 209 | current_architecture = XGATE_V1; |
| 210 | else if (strcasecmp (arg, "v2") == 0) |
| 211 | current_architecture = XGATE_V2; |
| 212 | else if (strcasecmp (arg, "v3") == 0) |
| 213 | current_architecture = XGATE_V3; |
| 214 | else |
| 215 | as_bad (_("architecture variant invalid")); |
| 216 | break; |
| 217 | |
| 218 | case OPTION_PRINT_INSN_SYNTAX: |
| 219 | flag_print_insn_syntax = 1; |
| 220 | break; |
| 221 | |
| 222 | case OPTION_PRINT_OPCODES: |
| 223 | flag_print_opcodes = 1; |
| 224 | break; |
| 225 | |
| 226 | case OPTION_GENERATE_EXAMPLE: |
| 227 | flag_print_opcodes = 2; |
| 228 | break; |
| 229 | |
| 230 | case OPTION_MSHORT: |
| 231 | elf_flags &= ~E_XGATE_I32; |
| 232 | break; |
| 233 | |
| 234 | case OPTION_MLONG: |
| 235 | elf_flags |= E_XGATE_I32; |
| 236 | break; |
| 237 | |
| 238 | case OPTION_MSHORT_DOUBLE: |
| 239 | elf_flags &= ~E_XGATE_F64; |
| 240 | break; |
| 241 | |
| 242 | case OPTION_MLONG_DOUBLE: |
| 243 | elf_flags |= E_XGATE_F64; |
| 244 | break; |
| 245 | |
| 246 | default: |
| 247 | return 0; |
| 248 | } |
| 249 | return 1; |
| 250 | } |
| 251 | |
| 252 | const char * |
| 253 | xgate_arch_format (void) |
| 254 | { |
| 255 | get_default_target (); |
| 256 | |
| 257 | if (current_architecture & cpuxgate) |
| 258 | return "elf32-xgate"; |
| 259 | |
| 260 | return "error"; |
| 261 | } |
| 262 | |
| 263 | static void |
| 264 | get_default_target (void) |
| 265 | { |
| 266 | const bfd_target *target; |
| 267 | bfd abfd; |
| 268 | |
| 269 | if (current_architecture != 0) |
| 270 | return; |
| 271 | |
| 272 | default_cpu = "unknown"; |
| 273 | target = bfd_find_target (0, &abfd); |
| 274 | |
| 275 | if (target && target->name) |
| 276 | { |
| 277 | if (strcmp (target->name, "elf32-xgate") == 0) |
| 278 | { |
| 279 | current_architecture = cpuxgate; |
| 280 | default_cpu = "XGATE V1"; |
| 281 | return; |
| 282 | } |
| 283 | |
| 284 | as_bad (_("Default target `%s' is not supported."), target->name); |
| 285 | } |
| 286 | } |
| 287 | |
| 288 | void |
| 289 | md_begin (void) |
| 290 | { |
| 291 | struct xgate_opcode *xgate_opcode_ptr = NULL; |
| 292 | struct xgate_opcode *xgate_op_table = NULL; |
| 293 | struct xgate_opcode_handle *op_handles = 0; |
| 294 | const char *prev_op_name = 0; |
| 295 | int handle_enum = 0; |
| 296 | int number_of_op_handles = 0; |
| 297 | int i, j = 0; |
| 298 | |
| 299 | /* Create a local copy of our opcode table |
| 300 | including an extra line for NULL termination. */ |
| 301 | xgate_op_table = XNEWVEC (struct xgate_opcode, xgate_num_opcodes); |
| 302 | |
| 303 | memset (xgate_op_table, 0, |
| 304 | sizeof (struct xgate_opcode) * (xgate_num_opcodes)); |
| 305 | |
| 306 | for (xgate_opcode_ptr = (struct xgate_opcode*) xgate_opcodes, i = 0; |
| 307 | i < xgate_num_opcodes; i++) |
| 308 | xgate_op_table[i] = xgate_opcode_ptr[i]; |
| 309 | |
| 310 | qsort (xgate_op_table, xgate_num_opcodes, sizeof (struct xgate_opcode), |
| 311 | (int (*)(const void *, const void *)) cmp_opcode); |
| 312 | |
| 313 | /* Calculate number of handles since this will be |
| 314 | smaller than the raw number of opcodes in the table. */ |
| 315 | prev_op_name = ""; |
| 316 | for (xgate_opcode_ptr = xgate_op_table, i = 0; i < xgate_num_opcodes; |
| 317 | xgate_opcode_ptr++, i++) |
| 318 | { |
| 319 | if (strcmp (prev_op_name, xgate_opcode_ptr->name)) |
| 320 | number_of_op_handles++; |
| 321 | prev_op_name = xgate_opcode_ptr->name; |
| 322 | } |
| 323 | |
| 324 | op_handles = XNEWVEC (struct xgate_opcode_handle, number_of_op_handles); |
| 325 | |
| 326 | /* Insert unique opcode names into hash table, aliasing duplicates. */ |
| 327 | xgate_hash = hash_new (); |
| 328 | |
| 329 | prev_op_name = ""; |
| 330 | for (xgate_opcode_ptr = xgate_op_table, i = 0, j = 0; i < xgate_num_opcodes; |
| 331 | i++, xgate_opcode_ptr++) |
| 332 | { |
| 333 | if (!strcmp (prev_op_name, xgate_opcode_ptr->name)) |
| 334 | { |
| 335 | handle_enum++; |
| 336 | op_handles[j].opc0[handle_enum] = xgate_opcode_ptr; |
| 337 | } |
| 338 | else |
| 339 | { |
| 340 | handle_enum = 0; |
| 341 | if (i) |
| 342 | j++; |
| 343 | op_handles[j].name = xgate_opcode_ptr->name; |
| 344 | op_handles[j].opc0[0] = xgate_opcode_ptr; |
| 345 | hash_insert (xgate_hash, (char *) op_handles[j].name, |
| 346 | (char *) &(op_handles[j])); |
| 347 | } |
| 348 | op_handles[j].number_of_modes = handle_enum; |
| 349 | prev_op_name = op_handles[j].name; |
| 350 | } |
| 351 | |
| 352 | if (flag_print_opcodes) |
| 353 | { |
| 354 | xgate_print_table (); |
| 355 | exit (EXIT_SUCCESS); |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | void |
| 360 | xgate_init_after_args (void) |
| 361 | { |
| 362 | } |
| 363 | |
| 364 | void |
| 365 | md_show_usage (FILE * stream) |
| 366 | { |
| 367 | get_default_target (); |
| 368 | |
| 369 | fprintf (stream, |
| 370 | _("\ |
| 371 | Freescale XGATE co-processor options:\n\ |
| 372 | -mshort use 16-bit int ABI (default)\n\ |
| 373 | -mlong use 32-bit int ABI\n\ |
| 374 | -mshort-double use 32-bit double ABI\n\ |
| 375 | -mlong-double use 64-bit double ABI (default)\n\ |
| 376 | --mxgate specify the processor variant [default %s]\n\ |
| 377 | --print-insn-syntax print the syntax of instruction in case of error\n\ |
| 378 | --print-opcodes print the list of instructions with syntax\n\ |
| 379 | --generate-example generate an example of each instruction"), |
| 380 | default_cpu); |
| 381 | } |
| 382 | |
| 383 | enum bfd_architecture |
| 384 | xgate_arch (void) |
| 385 | { |
| 386 | get_default_target (); |
| 387 | return bfd_arch_xgate; |
| 388 | } |
| 389 | |
| 390 | int |
| 391 | xgate_mach (void) |
| 392 | { |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | static void |
| 397 | xgate_print_syntax (char *name) |
| 398 | { |
| 399 | int i; |
| 400 | |
| 401 | for (i = 0; i < xgate_num_opcodes; i++) |
| 402 | { |
| 403 | if (!strcmp (xgate_opcodes[i].name, name)) |
| 404 | { |
| 405 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_IDR)) |
| 406 | printf ("\tFormat is %s\tRx, Rx, Rx+|-Rx|Rx\n", |
| 407 | xgate_opcodes[i].name); |
| 408 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_INH)) |
| 409 | printf ("\tFormat is %s\n", xgate_opcodes[i].name); |
| 410 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_TRI)) |
| 411 | printf ("\tFormat is %s\tRx, Rx, Rx\n", xgate_opcodes[i].name); |
| 412 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_DYA)) |
| 413 | printf ("\tFormat is %s\tRx, Rx\n", xgate_opcodes[i].name); |
| 414 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_IMM3)) |
| 415 | printf ("\tFormat is %s\t<3-bit value>\n", xgate_opcodes[i].name); |
| 416 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_IMM4)) |
| 417 | printf ("\tFormat is %s\t<4 -bit value>\n", xgate_opcodes[i].name); |
| 418 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_IMM8)) |
| 419 | printf ("\tFormat is %s\tRx, <8-bit value>\n", |
| 420 | xgate_opcodes[i].name); |
| 421 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_IMM16)) |
| 422 | printf ("\tFormat is %s\tRx, <16-bit value>\n", |
| 423 | xgate_opcodes[i].name); |
| 424 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_MON_R_C)) |
| 425 | printf ("\tFormat is %s\tRx, CCR\n", xgate_opcodes[i].name); |
| 426 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_MON_C_R)) |
| 427 | printf ("\tFormat is %s\tCCR, Rx\n", xgate_opcodes[i].name); |
| 428 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_MON_R_P)) |
| 429 | printf ("\tFormat is %s\tRx, PC\n", xgate_opcodes[i].name); |
| 430 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_IMM16mLDW)) |
| 431 | printf ("\tFormat is %s\tRx, <16-bit value>\n", |
| 432 | xgate_opcodes[i].name); |
| 433 | } |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | static void |
| 438 | xgate_print_table (void) |
| 439 | { |
| 440 | int i; |
| 441 | |
| 442 | for (i = 0; i < xgate_num_opcodes; i++) |
| 443 | xgate_print_syntax (xgate_opcodes[i].name); |
| 444 | |
| 445 | return; |
| 446 | } |
| 447 | |
| 448 | const char * |
| 449 | xgate_listing_header (void) |
| 450 | { |
| 451 | if (current_architecture & cpuxgate) |
| 452 | return "XGATE GAS "; |
| 453 | |
| 454 | return "ERROR MC9S12X GAS "; |
| 455 | } |
| 456 | |
| 457 | symbolS * |
| 458 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) |
| 459 | { |
| 460 | return NULL; |
| 461 | } |
| 462 | |
| 463 | /* GAS will call this function for each section at the end of the assembly, |
| 464 | to permit the CPU backend to adjust the alignment of a section. */ |
| 465 | |
| 466 | valueT |
| 467 | md_section_align (asection * seg, valueT addr) |
| 468 | { |
| 469 | int align = bfd_section_alignment (seg); |
| 470 | return ((addr + (1 << align) - 1) & -(1 << align)); |
| 471 | } |
| 472 | |
| 473 | void |
| 474 | md_assemble (char *input_line) |
| 475 | { |
| 476 | struct xgate_opcode *opcode = 0; |
| 477 | struct xgate_opcode *macro_opcode = 0; |
| 478 | struct xgate_opcode_handle *opcode_handle = 0; |
| 479 | /* Caller expects it to be returned as it was passed. */ |
| 480 | char *saved_input_line = input_line; |
| 481 | char op_name[9] = { 0 }; |
| 482 | unsigned int operandCount = 0; |
| 483 | char *p = 0; |
| 484 | |
| 485 | s_operand new_operands[MAX_NUM_OPERANDS]; |
| 486 | |
| 487 | fixup_required = 0; |
| 488 | oper_check = 0; /* set error flags */ |
| 489 | input_line = extract_word (input_line, op_name, sizeof (op_name)); |
| 490 | |
| 491 | /* Check to make sure we are not reading a bogus line. */ |
| 492 | if (!op_name[0]) |
| 493 | as_bad (_("opcode missing or not found on input line")); |
| 494 | |
| 495 | if (!(opcode_handle = (struct xgate_opcode_handle *) hash_find (xgate_hash, |
| 496 | op_name))) |
| 497 | { |
| 498 | as_bad (_("opcode %s not found in opcode hash table"), op_name); |
| 499 | } |
| 500 | else |
| 501 | { |
| 502 | /* Parse operands so we can find the proper opcode bin. */ |
| 503 | |
| 504 | operandCount = xgate_get_operands (input_line, new_operands); |
| 505 | |
| 506 | opcode = xgate_find_match (opcode_handle, opcode_handle->number_of_modes, |
| 507 | new_operands, operandCount); |
| 508 | |
| 509 | if (!opcode) |
| 510 | { |
| 511 | as_bad (_("matching operands to opcode")); |
| 512 | xgate_print_syntax (opcode_handle->opc0[0]->name); |
| 513 | } |
| 514 | else if (opcode->size == 2) |
| 515 | { |
| 516 | /* Size is one word - assemble that native insn. */ |
| 517 | xgate_scan_operands (opcode, new_operands); |
| 518 | } |
| 519 | else |
| 520 | { |
| 521 | /* Insn is a simplified instruction - expand it out. */ |
| 522 | autoHiLo = 1; |
| 523 | unsigned int i; |
| 524 | |
| 525 | /* skip past our ';' separator. */ |
| 526 | for (i = strlen (opcode->constraints), p = opcode->constraints; i > 0; |
| 527 | i--, p++) |
| 528 | { |
| 529 | if (*p == ';') |
| 530 | { |
| 531 | p++; |
| 532 | break; |
| 533 | } |
| 534 | } |
| 535 | input_line = skip_whitespace (input_line); |
| 536 | char *macro_inline = input_line; |
| 537 | |
| 538 | /* Loop though the macro's opcode list and apply operands to |
| 539 | each real opcode. */ |
| 540 | for (i = 0; *p && i < (opcode->size / 2); i++) |
| 541 | { |
| 542 | /* Loop though macro operand list. */ |
| 543 | input_line = macro_inline; /* Rewind. */ |
| 544 | p = extract_word (p, op_name, 10); |
| 545 | |
| 546 | if (!(opcode_handle = (struct xgate_opcode_handle *) |
| 547 | hash_find (xgate_hash, op_name))) |
| 548 | { |
| 549 | as_bad (_(": processing macro, real opcode handle" |
| 550 | " not found in hash")); |
| 551 | break; |
| 552 | } |
| 553 | else |
| 554 | { |
| 555 | operandCount = xgate_get_operands (input_line, new_operands); |
| 556 | macro_opcode = xgate_find_match (opcode_handle, |
| 557 | opcode_handle->number_of_modes, new_operands, |
| 558 | operandCount); |
| 559 | xgate_scan_operands (macro_opcode, new_operands); |
| 560 | } |
| 561 | } |
| 562 | } |
| 563 | } |
| 564 | autoHiLo = 0; |
| 565 | input_line = saved_input_line; |
| 566 | } |
| 567 | |
| 568 | /* Force truly undefined symbols to their maximum size, and generally set up |
| 569 | the frag list to be relaxed. */ |
| 570 | |
| 571 | int |
| 572 | md_estimate_size_before_relax (fragS *fragp, asection *seg) |
| 573 | { |
| 574 | /* If symbol is undefined or located in a different section, |
| 575 | select the largest supported relocation. */ |
| 576 | relax_substateT subtype; |
| 577 | relax_substateT rlx_state[] = { 0, 2 }; |
| 578 | |
| 579 | for (subtype = 0; subtype < ARRAY_SIZE (rlx_state); subtype += 2) |
| 580 | { |
| 581 | if (fragp->fr_subtype == rlx_state[subtype] |
| 582 | && (!S_IS_DEFINED (fragp->fr_symbol) |
| 583 | || seg != S_GET_SEGMENT (fragp->fr_symbol))) |
| 584 | { |
| 585 | fragp->fr_subtype = rlx_state[subtype + 1]; |
| 586 | break; |
| 587 | } |
| 588 | } |
| 589 | |
| 590 | if (fragp->fr_subtype >= ARRAY_SIZE (md_relax_table)) |
| 591 | abort (); |
| 592 | |
| 593 | return md_relax_table[fragp->fr_subtype].rlx_length; |
| 594 | } |
| 595 | |
| 596 | |
| 597 | /* Relocation, relaxation and frag conversions. */ |
| 598 | |
| 599 | /* PC-relative offsets are relative to the start of the |
| 600 | next instruction. That is, the address of the offset, plus its |
| 601 | size, since the offset is always the last part of the insn. */ |
| 602 | |
| 603 | long |
| 604 | md_pcrel_from (fixS * fixP) |
| 605 | { |
| 606 | return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address; |
| 607 | } |
| 608 | |
| 609 | /* If while processing a fixup, a reloc really needs to be created |
| 610 | then it is done here. */ |
| 611 | |
| 612 | arelent * |
| 613 | tc_gen_reloc (asection * section ATTRIBUTE_UNUSED, fixS * fixp) |
| 614 | { |
| 615 | arelent * reloc; |
| 616 | |
| 617 | reloc = XNEW (arelent); |
| 618 | reloc->sym_ptr_ptr = XNEW (asymbol *); |
| 619 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
| 620 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; |
| 621 | |
| 622 | if (fixp->fx_r_type == 0) |
| 623 | reloc->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_16); |
| 624 | else |
| 625 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); |
| 626 | |
| 627 | if (reloc->howto == (reloc_howto_type *) NULL) |
| 628 | { |
| 629 | as_bad_where (fixp->fx_file, fixp->fx_line, _ |
| 630 | ("Relocation %d is not supported by object file format."), |
| 631 | (int) fixp->fx_r_type); |
| 632 | return NULL; |
| 633 | } |
| 634 | |
| 635 | /* Since we use Rel instead of Rela, encode the vtable entry to be |
| 636 | used in the relocation's section offset. */ |
| 637 | if (fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) |
| 638 | reloc->address = fixp->fx_offset; |
| 639 | reloc->addend = 0; |
| 640 | return reloc; |
| 641 | } |
| 642 | |
| 643 | /* Patch the instruction with the resolved operand. Elf relocation |
| 644 | info will also be generated to take care of linker/loader fixups. |
| 645 | The XGATE addresses only 16-bit addresses.The BFD_RELOC_32 is necessary |
| 646 | for the support of --gstabs. */ |
| 647 | |
| 648 | void |
| 649 | md_apply_fix (fixS * fixP, valueT * valP, segT seg ATTRIBUTE_UNUSED) |
| 650 | { |
| 651 | char *where; |
| 652 | long value = *valP; |
| 653 | int opcode = 0; |
| 654 | ldiv_t result; |
| 655 | |
| 656 | /* If the fixup is done mark it done so no further symbol resolution |
| 657 | will take place. */ |
| 658 | if (fixP->fx_addsy == (symbolS *) NULL) |
| 659 | fixP->fx_done = 1; |
| 660 | |
| 661 | /* We don't actually support subtracting a symbol. */ |
| 662 | if (fixP->fx_subsy != (symbolS *) NULL) |
| 663 | as_bad_where (fixP->fx_file, fixP->fx_line, _("Expression too complex.")); |
| 664 | |
| 665 | where = fixP->fx_frag->fr_literal + fixP->fx_where; |
| 666 | opcode = bfd_getl16 (where); |
| 667 | int mask = 0; |
| 668 | |
| 669 | switch (fixP->fx_r_type) |
| 670 | { |
| 671 | case BFD_RELOC_XGATE_PCREL_9: |
| 672 | if (value < -512 || value > 511) |
| 673 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 674 | _("Value %ld too large for 9-bit PC-relative branch."), |
| 675 | value); |
| 676 | result = ldiv (value, 2); /* from bytes to words */ |
| 677 | value = result.quot; |
| 678 | if (result.rem) |
| 679 | as_bad_where (fixP->fx_file, fixP->fx_line, _ |
| 680 | ("Value %ld not aligned by 2 for 9-bit" |
| 681 | " PC-relative branch."), value); |
| 682 | /* Clip into 8-bit field. |
| 683 | FIXME I'm sure there is a more proper place for this. */ |
| 684 | mask = 0x1FF; |
| 685 | value &= mask; |
| 686 | number_to_chars_bigendian (where, (opcode | value), 2); |
| 687 | break; |
| 688 | case BFD_RELOC_XGATE_PCREL_10: |
| 689 | if (value < -1024 || value > 1023) |
| 690 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 691 | _("Value %ld too large for 10-bit PC-relative branch."), |
| 692 | value); |
| 693 | result = ldiv (value, 2); /* from bytes to words */ |
| 694 | value = result.quot; |
| 695 | if (result.rem) |
| 696 | as_bad_where (fixP->fx_file, fixP->fx_line, _ |
| 697 | ("Value %ld not aligned by 2 for 10-bit" |
| 698 | " PC-relative branch."), value); |
| 699 | /* Clip into 9-bit field. |
| 700 | FIXME I'm sure there is a more proper place for this. */ |
| 701 | mask = 0x3FF; |
| 702 | value &= mask; |
| 703 | number_to_chars_bigendian (where, (opcode | value), 2); |
| 704 | break; |
| 705 | case BFD_RELOC_XGATE_IMM8_HI: |
| 706 | if (value < -65537 || value > 65535) |
| 707 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 708 | _("Value out of 16-bit range.")); |
| 709 | value >>= 8; |
| 710 | value &= 0x00ff; |
| 711 | bfd_putb16 ((bfd_vma) value | opcode, (void *) where); |
| 712 | break; |
| 713 | case BFD_RELOC_XGATE_24: |
| 714 | case BFD_RELOC_XGATE_IMM8_LO: |
| 715 | if (value < -65537 || value > 65535) |
| 716 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 717 | _("Value out of 16-bit range.")); |
| 718 | value &= 0x00ff; |
| 719 | bfd_putb16 ((bfd_vma) value | opcode, (void *) where); |
| 720 | break; |
| 721 | case BFD_RELOC_XGATE_IMM3: |
| 722 | if (value < 0 || value > 7) |
| 723 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 724 | _("Value out of 3-bit range.")); |
| 725 | value <<= 8; /* make big endian */ |
| 726 | number_to_chars_bigendian (where, (opcode | value), 2); |
| 727 | break; |
| 728 | case BFD_RELOC_XGATE_IMM4: |
| 729 | if (value < 0 || value > 15) |
| 730 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 731 | _("Value out of 4-bit range.")); |
| 732 | value <<= 4; /* align the operand bits */ |
| 733 | number_to_chars_bigendian (where, (opcode | value), 2); |
| 734 | break; |
| 735 | case BFD_RELOC_XGATE_IMM5: |
| 736 | if (value < 0 || value > 31) |
| 737 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 738 | _("Value out of 5-bit range.")); |
| 739 | value <<= 5; /* align the operand bits */ |
| 740 | number_to_chars_bigendian (where, (opcode | value), 2); |
| 741 | break; |
| 742 | case BFD_RELOC_8: |
| 743 | ((bfd_byte *) where)[0] = (bfd_byte) value; |
| 744 | break; |
| 745 | case BFD_RELOC_32: |
| 746 | bfd_putb32 ((bfd_vma) value, (unsigned char *) where); |
| 747 | break; |
| 748 | case BFD_RELOC_16: |
| 749 | bfd_putb16 ((bfd_vma) value, (unsigned char *) where); |
| 750 | break; |
| 751 | default: |
| 752 | as_fatal (_("Line %d: unknown relocation type: 0x%x."), fixP->fx_line, |
| 753 | fixP->fx_r_type); |
| 754 | break; |
| 755 | } |
| 756 | } |
| 757 | |
| 758 | /* See whether we need to force a relocation into the output file. */ |
| 759 | |
| 760 | int |
| 761 | tc_xgate_force_relocation (fixS * fixP) |
| 762 | { |
| 763 | if (fixP->fx_r_type == BFD_RELOC_XGATE_RL_GROUP) |
| 764 | return 1; |
| 765 | return generic_force_reloc (fixP); |
| 766 | } |
| 767 | |
| 768 | /* Here we decide which fixups can be adjusted to make them relative |
| 769 | to the beginning of the section instead of the symbol. Basically |
| 770 | we need to make sure that the linker relaxation is done |
| 771 | correctly, so in some cases we force the original symbol to be |
| 772 | used. */ |
| 773 | |
| 774 | int |
| 775 | tc_xgate_fix_adjustable (fixS * fixP) |
| 776 | { |
| 777 | switch (fixP->fx_r_type) |
| 778 | { |
| 779 | /* For the linker relaxation to work correctly, these relocs |
| 780 | need to be on the symbol itself. */ |
| 781 | case BFD_RELOC_16: |
| 782 | case BFD_RELOC_XGATE_RL_JUMP: |
| 783 | case BFD_RELOC_XGATE_RL_GROUP: |
| 784 | case BFD_RELOC_VTABLE_INHERIT: |
| 785 | case BFD_RELOC_VTABLE_ENTRY: |
| 786 | case BFD_RELOC_32: |
| 787 | return 0; |
| 788 | default: |
| 789 | return 1; |
| 790 | } |
| 791 | } |
| 792 | |
| 793 | void |
| 794 | md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, |
| 795 | asection * sec ATTRIBUTE_UNUSED, |
| 796 | fragS * fragP ATTRIBUTE_UNUSED) |
| 797 | { |
| 798 | as_bad (("md_convert_frag not implemented yet")); |
| 799 | abort (); |
| 800 | } |
| 801 | |
| 802 | /* Set the ELF specific flags. */ |
| 803 | |
| 804 | void |
| 805 | xgate_elf_final_processing (void) |
| 806 | { |
| 807 | elf_flags |= EF_XGATE_MACH; |
| 808 | elf_elfheader (stdoutput)->e_flags &= ~EF_XGATE_ABI; |
| 809 | elf_elfheader (stdoutput)->e_flags |= elf_flags; |
| 810 | } |
| 811 | |
| 812 | static inline char * |
| 813 | skip_whitespace (char *s) |
| 814 | { |
| 815 | while (*s == ' ' || *s == '\t' || *s == '(' || *s == ')') |
| 816 | s++; |
| 817 | |
| 818 | return s; |
| 819 | } |
| 820 | |
| 821 | /* Extract a word (continuous alpha-numeric chars) from the input line. */ |
| 822 | |
| 823 | static char * |
| 824 | extract_word (char *from, char *to, int limit) |
| 825 | { |
| 826 | char *op_end; |
| 827 | int size = 0; |
| 828 | |
| 829 | /* Drop leading whitespace. */ |
| 830 | from = skip_whitespace (from); |
| 831 | *to = 0; |
| 832 | /* Find the op code end. */ |
| 833 | for (op_end = from; *op_end != 0 && is_part_of_name (*op_end);) |
| 834 | { |
| 835 | to[size++] = *op_end++; |
| 836 | if (size + 1 >= limit) |
| 837 | break; |
| 838 | } |
| 839 | to[size] = 0; |
| 840 | return op_end; |
| 841 | } |
| 842 | |
| 843 | static char * |
| 844 | xgate_new_instruction (int size) |
| 845 | { |
| 846 | char *f = frag_more (size); |
| 847 | dwarf2_emit_insn (size); |
| 848 | return f; |
| 849 | } |
| 850 | |
| 851 | static unsigned short |
| 852 | xgate_apply_operand (unsigned short new_mask, |
| 853 | unsigned short *availiable_mask_bits, |
| 854 | unsigned short mask, |
| 855 | unsigned char n_bits) |
| 856 | { |
| 857 | unsigned short n_shifts; |
| 858 | unsigned int n_drop_bits; |
| 859 | |
| 860 | /* Shift until you find an available operand bit "1" and record |
| 861 | the number of shifts. */ |
| 862 | for (n_shifts = 0; |
| 863 | !(*availiable_mask_bits & SIXTEENTH_BIT) && n_shifts < 16; |
| 864 | n_shifts++) |
| 865 | *availiable_mask_bits <<= 1; |
| 866 | |
| 867 | /* Shift for the number of bits your operand requires while bits |
| 868 | are available. */ |
| 869 | for (n_drop_bits = n_bits; |
| 870 | n_drop_bits && (*availiable_mask_bits & SIXTEENTH_BIT); |
| 871 | --n_drop_bits) |
| 872 | *availiable_mask_bits <<= 1; |
| 873 | |
| 874 | if (n_drop_bits) |
| 875 | as_bad (_(":operand has too many bits")); |
| 876 | *availiable_mask_bits >>= n_shifts + n_bits; |
| 877 | if ((n_drop_bits == 0) && (*availiable_mask_bits == 0)) |
| 878 | { |
| 879 | oper_check = 1; /* flag operand check as good */ |
| 880 | } |
| 881 | new_mask <<= N_BITS_IN_WORD - (n_shifts + n_bits); |
| 882 | mask |= new_mask; |
| 883 | return mask; |
| 884 | } |
| 885 | |
| 886 | /* Parse ordinary expression. */ |
| 887 | |
| 888 | static char * |
| 889 | xgate_parse_exp (char *s, expressionS * op) |
| 890 | { |
| 891 | input_line_pointer = s; |
| 892 | |
| 893 | expression (op); |
| 894 | if (op->X_op == O_absent) |
| 895 | as_bad (_("missing operand")); |
| 896 | return input_line_pointer; |
| 897 | } |
| 898 | |
| 899 | static int |
| 900 | cmp_opcode (struct xgate_opcode *op1, struct xgate_opcode *op2) |
| 901 | { |
| 902 | return strcmp (op1->name, op2->name); |
| 903 | } |
| 904 | |
| 905 | static struct xgate_opcode * |
| 906 | xgate_find_match (struct xgate_opcode_handle *opcode_handle, |
| 907 | int numberOfModes, s_operand oprs[], unsigned int operandCount) |
| 908 | { |
| 909 | int i; |
| 910 | |
| 911 | if (numberOfModes == 0) |
| 912 | return opcode_handle->opc0[0]; |
| 913 | |
| 914 | for (i = 0; i <= numberOfModes; i++) |
| 915 | { |
| 916 | switch (operandCount) |
| 917 | { |
| 918 | case 0: |
| 919 | if (!strcmp (opcode_handle->opc0[i]->constraints, XGATE_OP_INH)) |
| 920 | return opcode_handle->opc0[i]; |
| 921 | break; |
| 922 | case 1: |
| 923 | if (oprs[0].reg >= REG_R0 && oprs[0].reg <= REG_R7) |
| 924 | { |
| 925 | if (!strcmp (opcode_handle->opc0[i]->constraints, XGATE_OP_MON)) |
| 926 | return opcode_handle->opc0[i]; |
| 927 | if (!strcmp (opcode_handle->opc0[i]->constraints, XGATE_OP_DYA_MON)) |
| 928 | return opcode_handle->opc0[i]; |
| 929 | } |
| 930 | if (oprs[0].reg == REG_NONE) |
| 931 | if (!strcmp (opcode_handle->opc0[i]->constraints, XGATE_OP_IMM3)) |
| 932 | return opcode_handle->opc0[i]; |
| 933 | break; |
| 934 | case 2: |
| 935 | if (oprs[0].reg >= REG_R0 && oprs[0].reg <= REG_R7) |
| 936 | { |
| 937 | if (oprs[1].reg >= REG_R0 && oprs[1].reg <= REG_R7) |
| 938 | { |
| 939 | if (!strcmp (opcode_handle->opc0[i]->constraints, XGATE_OP_DYA)) |
| 940 | return opcode_handle->opc0[i]; |
| 941 | } |
| 942 | if (oprs[1].reg == REG_CCR) |
| 943 | if (!strcmp (opcode_handle->opc0[i]->constraints, |
| 944 | XGATE_OP_MON_R_C)) |
| 945 | return opcode_handle->opc0[i]; |
| 946 | if (oprs[1].reg == REG_PC) |
| 947 | if (!strcmp (opcode_handle->opc0[i]->constraints, |
| 948 | XGATE_OP_MON_R_P)) |
| 949 | return opcode_handle->opc0[i]; |
| 950 | if (oprs[1].reg == REG_NONE) |
| 951 | if (!strcmp (opcode_handle->opc0[i]->constraints, XGATE_OP_IMM16) |
| 952 | || !strcmp (opcode_handle->opc0[i]->constraints, XGATE_OP_IMM8) |
| 953 | || !strcmp (opcode_handle->opc0[i]->constraints, XGATE_OP_IMM4) |
| 954 | || !strcmp (opcode_handle->opc0[i]->constraints, |
| 955 | XGATE_OP_IMM16mADD) |
| 956 | || !strcmp (opcode_handle->opc0[i]->constraints, |
| 957 | XGATE_OP_IMM16mAND) |
| 958 | || !strcmp (opcode_handle->opc0[i]->constraints, |
| 959 | XGATE_OP_IMM16mCPC) |
| 960 | || !strcmp (opcode_handle->opc0[i]->constraints, |
| 961 | XGATE_OP_IMM16mSUB) |
| 962 | || !strcmp (opcode_handle->opc0[i]->constraints, |
| 963 | XGATE_OP_IMM16mLDW)) |
| 964 | return opcode_handle->opc0[i]; |
| 965 | } |
| 966 | if (oprs[0].reg == REG_CCR) |
| 967 | if (!strcmp (opcode_handle->opc0[i]->constraints, XGATE_OP_MON_C_R)) |
| 968 | return opcode_handle->opc0[i]; |
| 969 | break; |
| 970 | case 3: |
| 971 | if (oprs[0].reg >= REG_R0 && oprs[0].reg <= REG_R7) |
| 972 | { |
| 973 | if (oprs[1].reg >= REG_R0 && oprs[1].reg <= REG_R7) |
| 974 | { |
| 975 | if (oprs[2].reg >= REG_R0 && oprs[2].reg <= REG_R7) |
| 976 | { |
| 977 | if (!strcmp (opcode_handle->opc0[i]->constraints, |
| 978 | XGATE_OP_IDR) |
| 979 | || !strcmp (opcode_handle->opc0[i]->constraints, |
| 980 | XGATE_OP_TRI)) |
| 981 | return opcode_handle->opc0[i]; |
| 982 | } |
| 983 | |
| 984 | if (oprs[2].reg == REG_NONE) |
| 985 | if (!strcmp (opcode_handle->opc0[i]->constraints, |
| 986 | XGATE_OP_IDO5)) |
| 987 | return opcode_handle->opc0[i]; |
| 988 | } |
| 989 | } |
| 990 | break; |
| 991 | default: |
| 992 | as_bad (_("unknown operand count")); |
| 993 | break; |
| 994 | } |
| 995 | } |
| 996 | return NULL ; |
| 997 | } |
| 998 | |
| 999 | /* Because we are dealing with two different core that view the system |
| 1000 | memory with different offsets, we must differentiate what core a |
| 1001 | symbol belongs to, in order for the linker to cross-link. */ |
| 1002 | |
| 1003 | int |
| 1004 | xgate_frob_symbol (symbolS *sym) |
| 1005 | { |
| 1006 | asymbol *bfdsym; |
| 1007 | elf_symbol_type *elfsym; |
| 1008 | |
| 1009 | bfdsym = symbol_get_bfdsym (sym); |
| 1010 | elfsym = elf_symbol_from (bfd_asymbol_bfd (bfdsym), bfdsym); |
| 1011 | |
| 1012 | gas_assert (elfsym); |
| 1013 | |
| 1014 | /* Mark the symbol as being *from XGATE */ |
| 1015 | elfsym->internal_elf_sym.st_target_internal = 1; |
| 1016 | |
| 1017 | return 0; |
| 1018 | } |
| 1019 | |
| 1020 | static unsigned int |
| 1021 | xgate_get_operands (char *line, s_operand oprs[]) |
| 1022 | { |
| 1023 | int num_operands; |
| 1024 | |
| 1025 | /* If there are no operands, then it must be inherent. */ |
| 1026 | if (*line == 0 || *line == '\n' || *line == '\r') |
| 1027 | return 0; |
| 1028 | |
| 1029 | for (num_operands = 0; strlen (line) && (num_operands < MAX_NUM_OPERANDS); |
| 1030 | num_operands++) |
| 1031 | { |
| 1032 | line = skip_whitespace (line); |
| 1033 | if (*line == '#') |
| 1034 | line++; |
| 1035 | |
| 1036 | oprs[num_operands].mod = xgate_determine_modifiers (&line); |
| 1037 | |
| 1038 | if ((oprs[num_operands].reg = reg_name_search (line)) == REG_NONE) |
| 1039 | line = xgate_parse_exp (line, &oprs[num_operands].exp); |
| 1040 | |
| 1041 | /* skip to next operand */ |
| 1042 | while (*line != 0) |
| 1043 | { |
| 1044 | if (*line == ',') |
| 1045 | { |
| 1046 | line++; |
| 1047 | break; |
| 1048 | } |
| 1049 | line++; |
| 1050 | } |
| 1051 | } |
| 1052 | if (num_operands > MAX_NUM_OPERANDS) |
| 1053 | return 0; |
| 1054 | return num_operands; |
| 1055 | } |
| 1056 | |
| 1057 | /* reg_name_search() finds the register number given its name. |
| 1058 | Returns the register number or REG_NONE on failure. */ |
| 1059 | |
| 1060 | static register_id |
| 1061 | reg_name_search (char *name) |
| 1062 | { |
| 1063 | if (strncasecmp (name, "r0", 2) == 0) |
| 1064 | return REG_R0; |
| 1065 | if (strncasecmp (name, "r1", 2) == 0) |
| 1066 | return REG_R1; |
| 1067 | if (strncasecmp (name, "r2", 2) == 0) |
| 1068 | return REG_R2; |
| 1069 | if (strncasecmp (name, "r3", 2) == 0) |
| 1070 | return REG_R3; |
| 1071 | if (strncasecmp (name, "r4", 2) == 0) |
| 1072 | return REG_R4; |
| 1073 | if (strncasecmp (name, "r5", 2) == 0) |
| 1074 | return REG_R5; |
| 1075 | if (strncasecmp (name, "r6", 2) == 0) |
| 1076 | return REG_R6; |
| 1077 | if (strncasecmp (name, "r7", 2) == 0) |
| 1078 | return REG_R7; |
| 1079 | if (strncasecmp (name, "pc", 2) == 0) |
| 1080 | return REG_PC; |
| 1081 | if (strncasecmp (name, "ccr", 3) == 0) |
| 1082 | return REG_CCR; |
| 1083 | return REG_NONE; |
| 1084 | } |
| 1085 | |
| 1086 | /* Parse operand modifiers such as inc/dec/hi/low. */ |
| 1087 | |
| 1088 | static op_modifiers |
| 1089 | xgate_determine_modifiers (char **line) |
| 1090 | { |
| 1091 | char *local_line = line[0]; |
| 1092 | |
| 1093 | if (strncasecmp (local_line, "%hi", 3) == 0) |
| 1094 | { |
| 1095 | *line += 3; |
| 1096 | return MOD_LOAD_HIGH; |
| 1097 | } |
| 1098 | if (strncasecmp (local_line, "%lo", 3) == 0) |
| 1099 | { |
| 1100 | *line += 3; |
| 1101 | return MOD_LOAD_LOW; |
| 1102 | } |
| 1103 | if (*(local_line + 2) == '+') |
| 1104 | return MOD_POSTINC; |
| 1105 | if (strncasecmp (local_line, "-r", 2) == 0) |
| 1106 | { |
| 1107 | *line += 1; |
| 1108 | return MOD_PREDEC; |
| 1109 | } |
| 1110 | return MOD_NONE; |
| 1111 | } |
| 1112 | |
| 1113 | /* Parse instruction operands. */ |
| 1114 | |
| 1115 | static void |
| 1116 | xgate_scan_operands (struct xgate_opcode *opcode, s_operand oprs[]) |
| 1117 | { |
| 1118 | char *frag = xgate_new_instruction (opcode->size); |
| 1119 | int where = frag - frag_now->fr_literal; |
| 1120 | char *op = opcode->constraints; |
| 1121 | unsigned int bin = (int) opcode->bin_opcode; |
| 1122 | unsigned short oper_mask = 0; |
| 1123 | int operand_bit_length = 0; |
| 1124 | unsigned int operand = 0; |
| 1125 | char n_operand_bits = 0; |
| 1126 | char first_operand_equals_second = 0; |
| 1127 | int i = 0; |
| 1128 | char c = 0; |
| 1129 | |
| 1130 | /* Generate available operand bits mask. */ |
| 1131 | for (i = 0; (c = opcode->format[i]); i++) |
| 1132 | { |
| 1133 | if (ISDIGIT (c) || (c == 's')) |
| 1134 | { |
| 1135 | oper_mask <<= 1; |
| 1136 | } |
| 1137 | else |
| 1138 | { |
| 1139 | oper_mask <<= 1; |
| 1140 | oper_mask += 1; |
| 1141 | n_operand_bits++; |
| 1142 | } |
| 1143 | } |
| 1144 | |
| 1145 | /* Parse first operand. */ |
| 1146 | if (*op) |
| 1147 | { |
| 1148 | if (*op == '=') |
| 1149 | { |
| 1150 | first_operand_equals_second = 1; |
| 1151 | ++op; |
| 1152 | } |
| 1153 | operand = xgate_parse_operand (opcode, &operand_bit_length, where, |
| 1154 | &op, oprs[0]); |
| 1155 | ++op; |
| 1156 | bin = xgate_apply_operand (operand, &oper_mask, bin, operand_bit_length); |
| 1157 | |
| 1158 | if (first_operand_equals_second) |
| 1159 | bin = xgate_apply_operand (operand, &oper_mask, bin, |
| 1160 | operand_bit_length); |
| 1161 | /* Parse second operand. */ |
| 1162 | if (*op) |
| 1163 | { |
| 1164 | if (*op == ',') |
| 1165 | ++op; |
| 1166 | if (first_operand_equals_second) |
| 1167 | { |
| 1168 | bin = xgate_apply_operand (operand, &oper_mask, bin, |
| 1169 | operand_bit_length); |
| 1170 | ++op; |
| 1171 | } |
| 1172 | else |
| 1173 | { |
| 1174 | operand = xgate_parse_operand (opcode, &operand_bit_length, where, |
| 1175 | &op, oprs[1]); |
| 1176 | bin = xgate_apply_operand (operand, &oper_mask, bin, |
| 1177 | operand_bit_length); |
| 1178 | ++op; |
| 1179 | } |
| 1180 | } |
| 1181 | /* Parse the third register. */ |
| 1182 | if (*op) |
| 1183 | { |
| 1184 | if (*op == ',') |
| 1185 | ++op; |
| 1186 | operand = xgate_parse_operand (opcode, &operand_bit_length, where, |
| 1187 | &op, oprs[2]); |
| 1188 | bin = xgate_apply_operand (operand, &oper_mask, bin, |
| 1189 | operand_bit_length); |
| 1190 | } |
| 1191 | } |
| 1192 | if (opcode->size == 2 && fixup_required) |
| 1193 | { |
| 1194 | bfd_putl16 (bin, frag); |
| 1195 | } |
| 1196 | else if ( !strcmp (opcode->constraints, XGATE_OP_REL9) |
| 1197 | || !strcmp (opcode->constraints, XGATE_OP_REL10)) |
| 1198 | { |
| 1199 | /* Write our data to a frag for further processing. */ |
| 1200 | bfd_putl16 (opcode->bin_opcode, frag); |
| 1201 | } |
| 1202 | else |
| 1203 | { |
| 1204 | /* Apply operand mask(s)to bin opcode and write the output. */ |
| 1205 | /* Since we are done write this frag in xgate BE format. */ |
| 1206 | number_to_chars_bigendian (frag, bin, opcode->size); |
| 1207 | } |
| 1208 | prev = bin; |
| 1209 | return; |
| 1210 | } |
| 1211 | |
| 1212 | static unsigned int |
| 1213 | xgate_parse_operand (struct xgate_opcode *opcode, |
| 1214 | int *bit_width, |
| 1215 | int where, |
| 1216 | char **op_con, |
| 1217 | s_operand operand) |
| 1218 | { |
| 1219 | char *op_constraint = *op_con; |
| 1220 | unsigned int op_mask = 0; |
| 1221 | unsigned int pp_fix = 0; |
| 1222 | unsigned short max_size = 0; |
| 1223 | int i; |
| 1224 | |
| 1225 | *bit_width = 0; |
| 1226 | /* Reset. */ |
| 1227 | |
| 1228 | switch (*op_constraint) |
| 1229 | { |
| 1230 | case '+': /* Indexed register operand +/- or plain r. */ |
| 1231 | /* Default to neither inc or dec. */ |
| 1232 | pp_fix = 0; |
| 1233 | *bit_width = 5; |
| 1234 | |
| 1235 | if (operand.reg == REG_NONE) |
| 1236 | as_bad (_(": expected register name r0-r7 ") ); |
| 1237 | op_mask = operand.reg; |
| 1238 | if (operand.mod == MOD_POSTINC) |
| 1239 | pp_fix = INCREMENT; |
| 1240 | if (operand.mod == MOD_PREDEC) |
| 1241 | pp_fix = DECREMENT; |
| 1242 | op_mask <<= 2; |
| 1243 | op_mask |= pp_fix; |
| 1244 | break; |
| 1245 | |
| 1246 | case 'r': /* Register operand. */ |
| 1247 | if (operand.reg == REG_NONE) |
| 1248 | as_bad (_(": expected register name r0-r7 ")); |
| 1249 | |
| 1250 | *bit_width = 3; |
| 1251 | |
| 1252 | op_mask = operand.reg; |
| 1253 | break; |
| 1254 | |
| 1255 | case 'i': /* Immediate value or expression expected. */ |
| 1256 | /* Advance the original format pointer. */ |
| 1257 | (*op_con)++; |
| 1258 | op_constraint++; |
| 1259 | if (ISDIGIT (*op_constraint)) |
| 1260 | *bit_width = (int) *op_constraint - '0'; |
| 1261 | else if (*op_constraint == 'a') |
| 1262 | *bit_width = 0x0A; |
| 1263 | else if (*op_constraint == 'f') |
| 1264 | *bit_width = 0x0F; |
| 1265 | |
| 1266 | /* http://tigcc.ticalc.org/doc/gnuasm.html#SEC31 */ |
| 1267 | if (operand.exp.X_op == O_constant) |
| 1268 | { |
| 1269 | op_mask = operand.exp.X_add_number; |
| 1270 | if (((opcode->name[strlen (opcode->name) - 1] == 'l') && autoHiLo) |
| 1271 | || operand.mod == MOD_LOAD_LOW) |
| 1272 | op_mask &= 0x00FF; |
| 1273 | else if (((opcode->name[strlen (opcode->name) - 1]) == 'h' |
| 1274 | && autoHiLo) || operand.mod == MOD_LOAD_HIGH) |
| 1275 | op_mask >>= 8; |
| 1276 | |
| 1277 | /* Make sure it fits. */ |
| 1278 | for (i = *bit_width; i; i--) |
| 1279 | { |
| 1280 | max_size <<= 1; |
| 1281 | max_size += 1; |
| 1282 | } |
| 1283 | if (op_mask > max_size) |
| 1284 | as_bad (_(":operand value(%d) too big for constraint"), op_mask); |
| 1285 | } |
| 1286 | else |
| 1287 | { |
| 1288 | /* Should be BFD_RELOC_XGATE_IMM8_LO instead of BFD_RELOC_XGATE_24 |
| 1289 | TODO fix. */ |
| 1290 | fixup_required = 1; |
| 1291 | if (*op_constraint == '8') |
| 1292 | { |
| 1293 | if (((opcode->name[strlen (opcode->name) - 1] == 'l') |
| 1294 | && autoHiLo) || operand.mod == MOD_LOAD_LOW) |
| 1295 | fix_new_exp (frag_now, where, 2, &operand.exp, FALSE, |
| 1296 | BFD_RELOC_XGATE_24); |
| 1297 | else if (((opcode->name[strlen (opcode->name) - 1]) == 'h' |
| 1298 | && autoHiLo) || operand.mod == MOD_LOAD_HIGH ) |
| 1299 | fix_new_exp (frag_now, where, 2, &operand.exp, FALSE, |
| 1300 | BFD_RELOC_XGATE_IMM8_HI); |
| 1301 | else |
| 1302 | as_bad (_("you must use a hi/lo directive or 16-bit macro " |
| 1303 | "to load a 16-bit value.")); |
| 1304 | } |
| 1305 | else if (*op_constraint == '5') |
| 1306 | fix_new_exp (frag_now, where, 2, &operand.exp, FALSE, |
| 1307 | BFD_RELOC_XGATE_IMM5); |
| 1308 | else if (*op_constraint == '4') |
| 1309 | fix_new_exp (frag_now, where, 2, &operand.exp, FALSE, |
| 1310 | BFD_RELOC_XGATE_IMM4); |
| 1311 | else if (*op_constraint == '3') |
| 1312 | fix_new_exp (frag_now, where, 2, &operand.exp, FALSE, |
| 1313 | BFD_RELOC_XGATE_IMM3); |
| 1314 | else |
| 1315 | as_bad (_(":unknown relocation constraint size")); |
| 1316 | } |
| 1317 | break; |
| 1318 | |
| 1319 | case 'c': /* CCR register expected. */ |
| 1320 | *bit_width = 0; |
| 1321 | if (operand.reg != REG_CCR) |
| 1322 | as_bad (_(": expected register name ccr ")); |
| 1323 | break; |
| 1324 | |
| 1325 | case 'p': /* PC register expected. */ |
| 1326 | *bit_width = 0; |
| 1327 | if (operand.reg != REG_PC) |
| 1328 | as_bad (_(": expected register name pc ")); |
| 1329 | break; |
| 1330 | |
| 1331 | case 'b': /* Branch expected. */ |
| 1332 | (*op_con)++; |
| 1333 | op_constraint++; |
| 1334 | |
| 1335 | if (operand.exp.X_op != O_register) |
| 1336 | { |
| 1337 | if (*op_constraint == '9') |
| 1338 | fix_new_exp (frag_now, where, 2, &operand.exp, TRUE, |
| 1339 | BFD_RELOC_XGATE_PCREL_9); |
| 1340 | else if (*op_constraint == 'a') |
| 1341 | fix_new_exp (frag_now, where, 2, &operand.exp, TRUE, |
| 1342 | BFD_RELOC_XGATE_PCREL_10); |
| 1343 | } |
| 1344 | else |
| 1345 | as_fatal (_("Operand `%x' not recognized in fixup8."), |
| 1346 | operand.exp.X_op); |
| 1347 | break; |
| 1348 | case '?': |
| 1349 | break; |
| 1350 | |
| 1351 | default: |
| 1352 | as_bad (_("unknown constraint `%c'"), *op_constraint); |
| 1353 | break; |
| 1354 | } |
| 1355 | return op_mask; |
| 1356 | } |