| 1 | /* tc-cr16.c -- Assembler code for the CR16 CPU core. |
| 2 | Copyright (C) 2007-2019 Free Software Foundation, Inc. |
| 3 | |
| 4 | Contributed by M R Swami Reddy <MR.Swami.Reddy@nsc.com> |
| 5 | |
| 6 | This file is part of GAS, the GNU Assembler. |
| 7 | |
| 8 | GAS is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3, or (at your option) |
| 11 | any later version. |
| 12 | |
| 13 | GAS is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with GAS; see the file COPYING. If not, write to the |
| 20 | Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, |
| 21 | MA 02110-1301, USA. */ |
| 22 | |
| 23 | #include "as.h" |
| 24 | #include "safe-ctype.h" |
| 25 | #include "dwarf2dbg.h" |
| 26 | #include "opcode/cr16.h" |
| 27 | #include "elf/cr16.h" |
| 28 | |
| 29 | |
| 30 | /* Word is considered here as a 16-bit unsigned short int. */ |
| 31 | #define WORD_SHIFT 16 |
| 32 | |
| 33 | /* Register is 2-byte size. */ |
| 34 | #define REG_SIZE 2 |
| 35 | |
| 36 | /* Maximum size of a single instruction (in words). */ |
| 37 | #define INSN_MAX_SIZE 3 |
| 38 | |
| 39 | /* Maximum bits which may be set in a `mask16' operand. */ |
| 40 | #define MAX_REGS_IN_MASK16 8 |
| 41 | |
| 42 | /* Assign a number NUM, shifted by SHIFT bytes, into a location |
| 43 | pointed by index BYTE of array 'output_opcode'. */ |
| 44 | #define CR16_PRINT(BYTE, NUM, SHIFT) output_opcode[BYTE] |= (NUM << SHIFT) |
| 45 | |
| 46 | /* Operand errors. */ |
| 47 | typedef enum |
| 48 | { |
| 49 | OP_LEGAL = 0, /* Legal operand. */ |
| 50 | OP_OUT_OF_RANGE, /* Operand not within permitted range. */ |
| 51 | OP_NOT_EVEN /* Operand is Odd number, should be even. */ |
| 52 | } |
| 53 | op_err; |
| 54 | |
| 55 | /* Opcode mnemonics hash table. */ |
| 56 | static struct hash_control *cr16_inst_hash; |
| 57 | /* CR16 registers hash table. */ |
| 58 | static struct hash_control *reg_hash; |
| 59 | /* CR16 register pair hash table. */ |
| 60 | static struct hash_control *regp_hash; |
| 61 | /* CR16 processor registers hash table. */ |
| 62 | static struct hash_control *preg_hash; |
| 63 | /* CR16 processor registers 32 bit hash table. */ |
| 64 | static struct hash_control *pregp_hash; |
| 65 | /* Current instruction we're assembling. */ |
| 66 | const inst *instruction; |
| 67 | |
| 68 | |
| 69 | static int code_label = 0; |
| 70 | |
| 71 | /* Global variables. */ |
| 72 | |
| 73 | /* Array to hold an instruction encoding. */ |
| 74 | long output_opcode[2]; |
| 75 | |
| 76 | /* Nonzero means a relocatable symbol. */ |
| 77 | int relocatable; |
| 78 | |
| 79 | /* A copy of the original instruction (used in error messages). */ |
| 80 | char ins_parse[MAX_INST_LEN]; |
| 81 | |
| 82 | /* The current processed argument number. */ |
| 83 | int cur_arg_num; |
| 84 | |
| 85 | /* Generic assembler global variables which must be defined by all targets. */ |
| 86 | |
| 87 | /* Characters which always start a comment. */ |
| 88 | const char comment_chars[] = "#"; |
| 89 | |
| 90 | /* Characters which start a comment at the beginning of a line. */ |
| 91 | const char line_comment_chars[] = "#"; |
| 92 | |
| 93 | /* This array holds machine specific line separator characters. */ |
| 94 | const char line_separator_chars[] = ";"; |
| 95 | |
| 96 | /* Chars that can be used to separate mant from exp in floating point nums. */ |
| 97 | const char EXP_CHARS[] = "eE"; |
| 98 | |
| 99 | /* Chars that mean this number is a floating point constant as in 0f12.456 */ |
| 100 | const char FLT_CHARS[] = "f'"; |
| 101 | |
| 102 | #ifdef OBJ_ELF |
| 103 | /* Pre-defined "_GLOBAL_OFFSET_TABLE_" */ |
| 104 | symbolS * GOT_symbol; |
| 105 | #endif |
| 106 | |
| 107 | /* Target-specific multicharacter options, not const-declared at usage. */ |
| 108 | const char *md_shortopts = ""; |
| 109 | struct option md_longopts[] = |
| 110 | { |
| 111 | {NULL, no_argument, NULL, 0} |
| 112 | }; |
| 113 | size_t md_longopts_size = sizeof (md_longopts); |
| 114 | |
| 115 | static void |
| 116 | l_cons (int nbytes) |
| 117 | { |
| 118 | int c; |
| 119 | expressionS exp; |
| 120 | |
| 121 | #ifdef md_flush_pending_output |
| 122 | md_flush_pending_output (); |
| 123 | #endif |
| 124 | |
| 125 | if (is_it_end_of_statement ()) |
| 126 | { |
| 127 | demand_empty_rest_of_line (); |
| 128 | return; |
| 129 | } |
| 130 | |
| 131 | #ifdef TC_ADDRESS_BYTES |
| 132 | if (nbytes == 0) |
| 133 | nbytes = TC_ADDRESS_BYTES (); |
| 134 | #endif |
| 135 | |
| 136 | #ifdef md_cons_align |
| 137 | md_cons_align (nbytes); |
| 138 | #endif |
| 139 | |
| 140 | c = 0; |
| 141 | do |
| 142 | { |
| 143 | unsigned int bits_available = BITS_PER_CHAR * nbytes; |
| 144 | char *hold = input_line_pointer; |
| 145 | |
| 146 | expression (&exp); |
| 147 | |
| 148 | if (*input_line_pointer == ':') |
| 149 | { |
| 150 | /* Bitfields. */ |
| 151 | long value = 0; |
| 152 | |
| 153 | for (;;) |
| 154 | { |
| 155 | unsigned long width; |
| 156 | |
| 157 | if (*input_line_pointer != ':') |
| 158 | { |
| 159 | input_line_pointer = hold; |
| 160 | break; |
| 161 | } |
| 162 | if (exp.X_op == O_absent) |
| 163 | { |
| 164 | as_warn (_("using a bit field width of zero")); |
| 165 | exp.X_add_number = 0; |
| 166 | exp.X_op = O_constant; |
| 167 | } |
| 168 | |
| 169 | if (exp.X_op != O_constant) |
| 170 | { |
| 171 | *input_line_pointer = '\0'; |
| 172 | as_bad (_("field width \"%s\" too complex for a bitfield"), hold); |
| 173 | *input_line_pointer = ':'; |
| 174 | demand_empty_rest_of_line (); |
| 175 | return; |
| 176 | } |
| 177 | |
| 178 | if ((width = exp.X_add_number) > |
| 179 | (unsigned int)(BITS_PER_CHAR * nbytes)) |
| 180 | { |
| 181 | as_warn (ngettext ("field width %lu too big to fit in %d" |
| 182 | " byte: truncated to %d bits", |
| 183 | "field width %lu too big to fit in %d" |
| 184 | " bytes: truncated to %d bits", |
| 185 | nbytes), |
| 186 | width, nbytes, (BITS_PER_CHAR * nbytes)); |
| 187 | width = BITS_PER_CHAR * nbytes; |
| 188 | } /* Too big. */ |
| 189 | |
| 190 | |
| 191 | if (width > bits_available) |
| 192 | { |
| 193 | /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */ |
| 194 | input_line_pointer = hold; |
| 195 | exp.X_add_number = value; |
| 196 | break; |
| 197 | } |
| 198 | |
| 199 | /* Skip ':'. */ |
| 200 | hold = ++input_line_pointer; |
| 201 | |
| 202 | expression (&exp); |
| 203 | if (exp.X_op != O_constant) |
| 204 | { |
| 205 | char cache = *input_line_pointer; |
| 206 | |
| 207 | *input_line_pointer = '\0'; |
| 208 | as_bad (_("field value \"%s\" too complex for a bitfield"), hold); |
| 209 | *input_line_pointer = cache; |
| 210 | demand_empty_rest_of_line (); |
| 211 | return; |
| 212 | } |
| 213 | |
| 214 | value |= ((~(-(1 << width)) & exp.X_add_number) |
| 215 | << ((BITS_PER_CHAR * nbytes) - bits_available)); |
| 216 | |
| 217 | if ((bits_available -= width) == 0 |
| 218 | || is_it_end_of_statement () |
| 219 | || *input_line_pointer != ',') |
| 220 | break; |
| 221 | |
| 222 | hold = ++input_line_pointer; |
| 223 | expression (&exp); |
| 224 | } |
| 225 | |
| 226 | exp.X_add_number = value; |
| 227 | exp.X_op = O_constant; |
| 228 | exp.X_unsigned = 1; |
| 229 | } |
| 230 | |
| 231 | if ((*(input_line_pointer) == '@') && (*(input_line_pointer +1) == 'c')) |
| 232 | code_label = 1; |
| 233 | emit_expr (&exp, (unsigned int) nbytes); |
| 234 | ++c; |
| 235 | if ((*(input_line_pointer) == '@') && (*(input_line_pointer +1) == 'c')) |
| 236 | { |
| 237 | input_line_pointer +=3; |
| 238 | break; |
| 239 | } |
| 240 | } |
| 241 | while ((*input_line_pointer++ == ',')); |
| 242 | |
| 243 | /* Put terminator back into stream. */ |
| 244 | input_line_pointer--; |
| 245 | |
| 246 | demand_empty_rest_of_line (); |
| 247 | } |
| 248 | |
| 249 | /* This table describes all the machine specific pseudo-ops |
| 250 | the assembler has to support. The fields are: |
| 251 | *** Pseudo-op name without dot. |
| 252 | *** Function to call to execute this pseudo-op. |
| 253 | *** Integer arg to pass to the function. */ |
| 254 | |
| 255 | const pseudo_typeS md_pseudo_table[] = |
| 256 | { |
| 257 | /* In CR16 machine, align is in bytes (not a ptwo boundary). */ |
| 258 | {"align", s_align_bytes, 0}, |
| 259 | {"long", l_cons, 4 }, |
| 260 | {"4byte", l_cons, 4 }, |
| 261 | {0, 0, 0} |
| 262 | }; |
| 263 | |
| 264 | /* CR16 relaxation table. */ |
| 265 | const relax_typeS md_relax_table[] = |
| 266 | { |
| 267 | /* bCC */ |
| 268 | {0x7f, -0x80, 2, 1}, /* 8 */ |
| 269 | {0xfffe, -0x10000, 4, 2}, /* 16 */ |
| 270 | {0xfffffe, -0x1000000, 6, 0}, /* 24 */ |
| 271 | }; |
| 272 | |
| 273 | /* Return the bit size for a given operand. */ |
| 274 | |
| 275 | static int |
| 276 | get_opbits (operand_type op) |
| 277 | { |
| 278 | if (op < MAX_OPRD) |
| 279 | return cr16_optab[op].bit_size; |
| 280 | |
| 281 | return 0; |
| 282 | } |
| 283 | |
| 284 | /* Return the argument type of a given operand. */ |
| 285 | |
| 286 | static argtype |
| 287 | get_optype (operand_type op) |
| 288 | { |
| 289 | if (op < MAX_OPRD) |
| 290 | return cr16_optab[op].arg_type; |
| 291 | else |
| 292 | return nullargs; |
| 293 | } |
| 294 | |
| 295 | /* Return the flags of a given operand. */ |
| 296 | |
| 297 | static int |
| 298 | get_opflags (operand_type op) |
| 299 | { |
| 300 | if (op < MAX_OPRD) |
| 301 | return cr16_optab[op].flags; |
| 302 | |
| 303 | return 0; |
| 304 | } |
| 305 | |
| 306 | /* Get the cc code. */ |
| 307 | |
| 308 | static int |
| 309 | get_cc (char *cc_name) |
| 310 | { |
| 311 | unsigned int i; |
| 312 | |
| 313 | for (i = 0; i < cr16_num_cc; i++) |
| 314 | if (strcmp (cc_name, cr16_b_cond_tab[i]) == 0) |
| 315 | return i; |
| 316 | |
| 317 | return -1; |
| 318 | } |
| 319 | |
| 320 | /* Get the core processor register 'reg_name'. */ |
| 321 | |
| 322 | static reg |
| 323 | get_register (char *reg_name) |
| 324 | { |
| 325 | const reg_entry *rreg; |
| 326 | |
| 327 | rreg = (const reg_entry *) hash_find (reg_hash, reg_name); |
| 328 | |
| 329 | if (rreg != NULL) |
| 330 | return rreg->value.reg_val; |
| 331 | |
| 332 | return nullregister; |
| 333 | } |
| 334 | /* Get the core processor register-pair 'reg_name'. */ |
| 335 | |
| 336 | static reg |
| 337 | get_register_pair (char *reg_name) |
| 338 | { |
| 339 | const reg_entry *rreg; |
| 340 | char tmp_rp[16]="\0"; |
| 341 | |
| 342 | /* Add '(' and ')' to the reg pair, if it's not present. */ |
| 343 | if (reg_name[0] != '(') |
| 344 | { |
| 345 | tmp_rp[0] = '('; |
| 346 | strcat (tmp_rp, reg_name); |
| 347 | strcat (tmp_rp,")"); |
| 348 | rreg = (const reg_entry *) hash_find (regp_hash, tmp_rp); |
| 349 | } |
| 350 | else |
| 351 | rreg = (const reg_entry *) hash_find (regp_hash, reg_name); |
| 352 | |
| 353 | if (rreg != NULL) |
| 354 | return rreg->value.reg_val; |
| 355 | |
| 356 | return nullregister; |
| 357 | } |
| 358 | |
| 359 | /* Get the index register 'reg_name'. */ |
| 360 | |
| 361 | static reg |
| 362 | get_index_register (char *reg_name) |
| 363 | { |
| 364 | const reg_entry *rreg; |
| 365 | |
| 366 | rreg = (const reg_entry *) hash_find (reg_hash, reg_name); |
| 367 | |
| 368 | if ((rreg != NULL) |
| 369 | && ((rreg->value.reg_val == 12) || (rreg->value.reg_val == 13))) |
| 370 | return rreg->value.reg_val; |
| 371 | |
| 372 | return nullregister; |
| 373 | } |
| 374 | /* Get the core processor index register-pair 'reg_name'. */ |
| 375 | |
| 376 | static reg |
| 377 | get_index_register_pair (char *reg_name) |
| 378 | { |
| 379 | const reg_entry *rreg; |
| 380 | |
| 381 | rreg = (const reg_entry *) hash_find (regp_hash, reg_name); |
| 382 | |
| 383 | if (rreg != NULL) |
| 384 | { |
| 385 | if ((rreg->value.reg_val != 1) || (rreg->value.reg_val != 7) |
| 386 | || (rreg->value.reg_val != 9) || (rreg->value.reg_val > 10)) |
| 387 | return rreg->value.reg_val; |
| 388 | |
| 389 | as_bad (_("Unknown register pair - index relative mode: `%d'"), rreg->value.reg_val); |
| 390 | } |
| 391 | |
| 392 | return nullregister; |
| 393 | } |
| 394 | |
| 395 | /* Get the processor register 'preg_name'. */ |
| 396 | |
| 397 | static preg |
| 398 | get_pregister (char *preg_name) |
| 399 | { |
| 400 | const reg_entry *prreg; |
| 401 | |
| 402 | prreg = (const reg_entry *) hash_find (preg_hash, preg_name); |
| 403 | |
| 404 | if (prreg != NULL) |
| 405 | return prreg->value.preg_val; |
| 406 | |
| 407 | return nullpregister; |
| 408 | } |
| 409 | |
| 410 | /* Get the processor register 'preg_name 32 bit'. */ |
| 411 | |
| 412 | static preg |
| 413 | get_pregisterp (char *preg_name) |
| 414 | { |
| 415 | const reg_entry *prreg; |
| 416 | |
| 417 | prreg = (const reg_entry *) hash_find (pregp_hash, preg_name); |
| 418 | |
| 419 | if (prreg != NULL) |
| 420 | return prreg->value.preg_val; |
| 421 | |
| 422 | return nullpregister; |
| 423 | } |
| 424 | |
| 425 | |
| 426 | /* Round up a section size to the appropriate boundary. */ |
| 427 | |
| 428 | valueT |
| 429 | md_section_align (segT seg, valueT val) |
| 430 | { |
| 431 | /* Round .text section to a multiple of 2. */ |
| 432 | if (seg == text_section) |
| 433 | return (val + 1) & ~1; |
| 434 | return val; |
| 435 | } |
| 436 | |
| 437 | /* Parse an operand that is machine-specific (remove '*'). */ |
| 438 | |
| 439 | void |
| 440 | md_operand (expressionS * exp) |
| 441 | { |
| 442 | char c = *input_line_pointer; |
| 443 | |
| 444 | switch (c) |
| 445 | { |
| 446 | case '*': |
| 447 | input_line_pointer++; |
| 448 | expression (exp); |
| 449 | break; |
| 450 | default: |
| 451 | break; |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | /* Reset global variables before parsing a new instruction. */ |
| 456 | |
| 457 | static void |
| 458 | reset_vars (char *op) |
| 459 | { |
| 460 | cur_arg_num = relocatable = 0; |
| 461 | memset (& output_opcode, '\0', sizeof (output_opcode)); |
| 462 | |
| 463 | /* Save a copy of the original OP (used in error messages). */ |
| 464 | strncpy (ins_parse, op, sizeof ins_parse - 1); |
| 465 | ins_parse [sizeof ins_parse - 1] = 0; |
| 466 | } |
| 467 | |
| 468 | /* This macro decides whether a particular reloc is an entry in a |
| 469 | switch table. It is used when relaxing, because the linker needs |
| 470 | to know about all such entries so that it can adjust them if |
| 471 | necessary. */ |
| 472 | |
| 473 | #define SWITCH_TABLE(fix) \ |
| 474 | ( (fix)->fx_addsy != NULL \ |
| 475 | && (fix)->fx_subsy != NULL \ |
| 476 | && S_GET_SEGMENT ((fix)->fx_addsy) == \ |
| 477 | S_GET_SEGMENT ((fix)->fx_subsy) \ |
| 478 | && S_GET_SEGMENT (fix->fx_addsy) != undefined_section \ |
| 479 | && ( (fix)->fx_r_type == BFD_RELOC_CR16_NUM8 \ |
| 480 | || (fix)->fx_r_type == BFD_RELOC_CR16_NUM16 \ |
| 481 | || (fix)->fx_r_type == BFD_RELOC_CR16_NUM32 \ |
| 482 | || (fix)->fx_r_type == BFD_RELOC_CR16_NUM32a)) |
| 483 | |
| 484 | /* See whether we need to force a relocation into the output file. |
| 485 | This is used to force out switch and PC relative relocations when |
| 486 | relaxing. */ |
| 487 | |
| 488 | int |
| 489 | cr16_force_relocation (fixS *fix) |
| 490 | { |
| 491 | if (generic_force_reloc (fix) || SWITCH_TABLE (fix)) |
| 492 | return 1; |
| 493 | |
| 494 | return 0; |
| 495 | } |
| 496 | |
| 497 | /* Record a fixup for a cons expression. */ |
| 498 | |
| 499 | void |
| 500 | cr16_cons_fix_new (fragS *frag, int offset, int len, expressionS *exp, |
| 501 | bfd_reloc_code_real_type rtype) |
| 502 | { |
| 503 | switch (len) |
| 504 | { |
| 505 | default: rtype = BFD_RELOC_NONE; break; |
| 506 | case 1: rtype = BFD_RELOC_CR16_NUM8 ; break; |
| 507 | case 2: rtype = BFD_RELOC_CR16_NUM16; break; |
| 508 | case 4: |
| 509 | if (code_label) |
| 510 | { |
| 511 | rtype = BFD_RELOC_CR16_NUM32a; |
| 512 | code_label = 0; |
| 513 | } |
| 514 | else |
| 515 | rtype = BFD_RELOC_CR16_NUM32; |
| 516 | break; |
| 517 | } |
| 518 | |
| 519 | fix_new_exp (frag, offset, len, exp, 0, rtype); |
| 520 | } |
| 521 | |
| 522 | /* Generate a relocation entry for a fixup. */ |
| 523 | |
| 524 | arelent * |
| 525 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS * fixP) |
| 526 | { |
| 527 | arelent * reloc; |
| 528 | |
| 529 | /* If symbols are local and resolved, then no relocation needed. */ |
| 530 | if ( ((fixP->fx_addsy) |
| 531 | && (S_GET_SEGMENT (fixP->fx_addsy) == absolute_section)) |
| 532 | || ((fixP->fx_subsy) |
| 533 | && (S_GET_SEGMENT (fixP->fx_subsy) == absolute_section))) |
| 534 | return NULL; |
| 535 | |
| 536 | reloc = XNEW (arelent); |
| 537 | reloc->sym_ptr_ptr = XNEW (asymbol *); |
| 538 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy); |
| 539 | reloc->address = fixP->fx_frag->fr_address + fixP->fx_where; |
| 540 | reloc->addend = fixP->fx_offset; |
| 541 | |
| 542 | if (fixP->fx_subsy != NULL) |
| 543 | { |
| 544 | if (SWITCH_TABLE (fixP)) |
| 545 | { |
| 546 | /* Keep the current difference in the addend. */ |
| 547 | reloc->addend = (S_GET_VALUE (fixP->fx_addsy) |
| 548 | - S_GET_VALUE (fixP->fx_subsy) + fixP->fx_offset); |
| 549 | |
| 550 | switch (fixP->fx_r_type) |
| 551 | { |
| 552 | case BFD_RELOC_CR16_NUM8: |
| 553 | fixP->fx_r_type = BFD_RELOC_CR16_SWITCH8; |
| 554 | break; |
| 555 | case BFD_RELOC_CR16_NUM16: |
| 556 | fixP->fx_r_type = BFD_RELOC_CR16_SWITCH16; |
| 557 | break; |
| 558 | case BFD_RELOC_CR16_NUM32: |
| 559 | fixP->fx_r_type = BFD_RELOC_CR16_SWITCH32; |
| 560 | break; |
| 561 | case BFD_RELOC_CR16_NUM32a: |
| 562 | fixP->fx_r_type = BFD_RELOC_CR16_NUM32a; |
| 563 | break; |
| 564 | default: |
| 565 | abort (); |
| 566 | break; |
| 567 | } |
| 568 | } |
| 569 | else |
| 570 | { |
| 571 | /* We only resolve difference expressions in the same section. */ |
| 572 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 573 | _("can't resolve `%s' {%s section} - `%s' {%s section}"), |
| 574 | fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "0", |
| 575 | segment_name (fixP->fx_addsy |
| 576 | ? S_GET_SEGMENT (fixP->fx_addsy) |
| 577 | : absolute_section), |
| 578 | S_GET_NAME (fixP->fx_subsy), |
| 579 | segment_name (S_GET_SEGMENT (fixP->fx_addsy))); |
| 580 | } |
| 581 | } |
| 582 | #ifdef OBJ_ELF |
| 583 | if ((fixP->fx_r_type == BFD_RELOC_CR16_GOT_REGREL20) |
| 584 | && GOT_symbol |
| 585 | && fixP->fx_addsy == GOT_symbol) |
| 586 | { |
| 587 | reloc->addend = fixP->fx_offset = reloc->address; |
| 588 | } |
| 589 | else if ((fixP->fx_r_type == BFD_RELOC_CR16_GOTC_REGREL20) |
| 590 | && GOT_symbol |
| 591 | && fixP->fx_addsy == GOT_symbol) |
| 592 | { |
| 593 | reloc->addend = fixP->fx_offset = reloc->address; |
| 594 | } |
| 595 | #endif |
| 596 | |
| 597 | gas_assert ((int) fixP->fx_r_type > 0); |
| 598 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixP->fx_r_type); |
| 599 | |
| 600 | if (reloc->howto == NULL) |
| 601 | { |
| 602 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 603 | _("internal error: reloc %d (`%s') not supported by object file format"), |
| 604 | fixP->fx_r_type, |
| 605 | bfd_get_reloc_code_name (fixP->fx_r_type)); |
| 606 | return NULL; |
| 607 | } |
| 608 | gas_assert (!fixP->fx_pcrel == !reloc->howto->pc_relative); |
| 609 | |
| 610 | return reloc; |
| 611 | } |
| 612 | |
| 613 | /* Prepare machine-dependent frags for relaxation. */ |
| 614 | |
| 615 | int |
| 616 | md_estimate_size_before_relax (fragS *fragp, asection *seg) |
| 617 | { |
| 618 | /* If symbol is undefined or located in a different section, |
| 619 | select the largest supported relocation. */ |
| 620 | relax_substateT subtype; |
| 621 | relax_substateT rlx_state[] = {0, 2}; |
| 622 | |
| 623 | for (subtype = 0; subtype < ARRAY_SIZE (rlx_state); subtype += 2) |
| 624 | { |
| 625 | if (fragp->fr_subtype == rlx_state[subtype] |
| 626 | && (!S_IS_DEFINED (fragp->fr_symbol) |
| 627 | || seg != S_GET_SEGMENT (fragp->fr_symbol))) |
| 628 | { |
| 629 | fragp->fr_subtype = rlx_state[subtype + 1]; |
| 630 | break; |
| 631 | } |
| 632 | } |
| 633 | |
| 634 | if (fragp->fr_subtype >= ARRAY_SIZE (md_relax_table)) |
| 635 | abort (); |
| 636 | |
| 637 | return md_relax_table[fragp->fr_subtype].rlx_length; |
| 638 | } |
| 639 | |
| 640 | void |
| 641 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, fragS *fragP) |
| 642 | { |
| 643 | /* 'opcode' points to the start of the instruction, whether |
| 644 | we need to change the instruction's fixed encoding. */ |
| 645 | char *opcode = fragP->fr_literal + fragP->fr_fix; |
| 646 | bfd_reloc_code_real_type reloc; |
| 647 | |
| 648 | subseg_change (sec, 0); |
| 649 | |
| 650 | switch (fragP->fr_subtype) |
| 651 | { |
| 652 | case 0: |
| 653 | reloc = BFD_RELOC_CR16_DISP8; |
| 654 | break; |
| 655 | case 1: |
| 656 | /* If the subtype is not changed due to :m operand qualifier, |
| 657 | then no need to update the opcode value. */ |
| 658 | if ((int)opcode[1] != 0x18) |
| 659 | { |
| 660 | opcode[0] = (opcode[0] & 0xf0); |
| 661 | opcode[1] = 0x18; |
| 662 | } |
| 663 | reloc = BFD_RELOC_CR16_DISP16; |
| 664 | break; |
| 665 | case 2: |
| 666 | /* If the subtype is not changed due to :l operand qualifier, |
| 667 | then no need to update the opcode value. */ |
| 668 | if ((int)opcode[1] != 0) |
| 669 | { |
| 670 | opcode[2] = opcode[0]; |
| 671 | opcode[0] = opcode[1]; |
| 672 | opcode[1] = 0x0; |
| 673 | } |
| 674 | reloc = BFD_RELOC_CR16_DISP24; |
| 675 | break; |
| 676 | default: |
| 677 | abort(); |
| 678 | } |
| 679 | |
| 680 | fix_new (fragP, fragP->fr_fix, |
| 681 | bfd_get_reloc_size (bfd_reloc_type_lookup (stdoutput, reloc)), |
| 682 | fragP->fr_symbol, fragP->fr_offset, 1, reloc); |
| 683 | fragP->fr_var = 0; |
| 684 | fragP->fr_fix += md_relax_table[fragP->fr_subtype].rlx_length; |
| 685 | } |
| 686 | |
| 687 | symbolS * |
| 688 | md_undefined_symbol (char *name) |
| 689 | { |
| 690 | if (*name == '_' && *(name + 1) == 'G' |
| 691 | && strcmp (name, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 692 | { |
| 693 | if (!GOT_symbol) |
| 694 | { |
| 695 | if (symbol_find (name)) |
| 696 | as_bad (_("GOT already in symbol table")); |
| 697 | GOT_symbol = symbol_new (name, undefined_section, |
| 698 | (valueT) 0, &zero_address_frag); |
| 699 | } |
| 700 | return GOT_symbol; |
| 701 | } |
| 702 | return 0; |
| 703 | } |
| 704 | |
| 705 | /* Process machine-dependent command line options. Called once for |
| 706 | each option on the command line that the machine-independent part of |
| 707 | GAS does not understand. */ |
| 708 | |
| 709 | int |
| 710 | md_parse_option (int c ATTRIBUTE_UNUSED, const char *arg ATTRIBUTE_UNUSED) |
| 711 | { |
| 712 | return 0; |
| 713 | } |
| 714 | |
| 715 | /* Machine-dependent usage-output. */ |
| 716 | |
| 717 | void |
| 718 | md_show_usage (FILE *stream ATTRIBUTE_UNUSED) |
| 719 | { |
| 720 | return; |
| 721 | } |
| 722 | |
| 723 | const char * |
| 724 | md_atof (int type, char *litP, int *sizeP) |
| 725 | { |
| 726 | return ieee_md_atof (type, litP, sizeP, target_big_endian); |
| 727 | } |
| 728 | |
| 729 | /* Apply a fixS (fixup of an instruction or data that we didn't have |
| 730 | enough info to complete immediately) to the data in a frag. |
| 731 | Since linkrelax is nonzero and TC_LINKRELAX_FIXUP is defined to disable |
| 732 | relaxation of debug sections, this function is called only when |
| 733 | fixuping relocations of debug sections. */ |
| 734 | |
| 735 | void |
| 736 | md_apply_fix (fixS *fixP, valueT *valP, segT seg) |
| 737 | { |
| 738 | valueT val = * valP; |
| 739 | |
| 740 | if (fixP->fx_addsy == NULL |
| 741 | && fixP->fx_pcrel == 0) |
| 742 | fixP->fx_done = 1; |
| 743 | else if (fixP->fx_pcrel == 1 |
| 744 | && fixP->fx_addsy != NULL |
| 745 | && S_GET_SEGMENT (fixP->fx_addsy) == seg) |
| 746 | fixP->fx_done = 1; |
| 747 | else |
| 748 | fixP->fx_done = 0; |
| 749 | |
| 750 | if (fixP->fx_addsy != NULL && !fixP->fx_pcrel) |
| 751 | { |
| 752 | val = fixP->fx_offset; |
| 753 | fixP->fx_done = 1; |
| 754 | } |
| 755 | |
| 756 | if (fixP->fx_done) |
| 757 | { |
| 758 | char *buf = fixP->fx_frag->fr_literal + fixP->fx_where; |
| 759 | |
| 760 | fixP->fx_offset = 0; |
| 761 | |
| 762 | switch (fixP->fx_r_type) |
| 763 | { |
| 764 | case BFD_RELOC_CR16_NUM8: |
| 765 | bfd_put_8 (stdoutput, (unsigned char) val, buf); |
| 766 | break; |
| 767 | case BFD_RELOC_CR16_NUM16: |
| 768 | bfd_put_16 (stdoutput, val, buf); |
| 769 | break; |
| 770 | case BFD_RELOC_CR16_NUM32: |
| 771 | bfd_put_32 (stdoutput, val, buf); |
| 772 | break; |
| 773 | case BFD_RELOC_CR16_NUM32a: |
| 774 | bfd_put_32 (stdoutput, val, buf); |
| 775 | break; |
| 776 | default: |
| 777 | /* We shouldn't ever get here because linkrelax is nonzero. */ |
| 778 | abort (); |
| 779 | break; |
| 780 | } |
| 781 | fixP->fx_done = 0; |
| 782 | } |
| 783 | else |
| 784 | fixP->fx_offset = * valP; |
| 785 | } |
| 786 | |
| 787 | /* The location from which a PC relative jump should be calculated, |
| 788 | given a PC relative reloc. */ |
| 789 | |
| 790 | long |
| 791 | md_pcrel_from (fixS *fixp) |
| 792 | { |
| 793 | return fixp->fx_frag->fr_address + fixp->fx_where; |
| 794 | } |
| 795 | |
| 796 | static void |
| 797 | initialise_reg_hash_table (struct hash_control ** hash_table, |
| 798 | const reg_entry * register_table, |
| 799 | const unsigned int num_entries) |
| 800 | { |
| 801 | const reg_entry * rreg; |
| 802 | const char *hashret; |
| 803 | |
| 804 | if ((* hash_table = hash_new ()) == NULL) |
| 805 | as_fatal (_("Virtual memory exhausted")); |
| 806 | |
| 807 | for (rreg = register_table; |
| 808 | rreg < (register_table + num_entries); |
| 809 | rreg++) |
| 810 | { |
| 811 | hashret = hash_insert (* hash_table, rreg->name, (char *) rreg); |
| 812 | if (hashret) |
| 813 | as_fatal (_("Internal Error: Can't hash %s: %s"), |
| 814 | rreg->name, hashret); |
| 815 | } |
| 816 | } |
| 817 | |
| 818 | /* This function is called once, at assembler startup time. This should |
| 819 | set up all the tables, etc that the MD part of the assembler needs. */ |
| 820 | |
| 821 | void |
| 822 | md_begin (void) |
| 823 | { |
| 824 | int i = 0; |
| 825 | |
| 826 | /* Set up a hash table for the instructions. */ |
| 827 | if ((cr16_inst_hash = hash_new ()) == NULL) |
| 828 | as_fatal (_("Virtual memory exhausted")); |
| 829 | |
| 830 | while (cr16_instruction[i].mnemonic != NULL) |
| 831 | { |
| 832 | const char *hashret; |
| 833 | const char *mnemonic = cr16_instruction[i].mnemonic; |
| 834 | |
| 835 | hashret = hash_insert (cr16_inst_hash, mnemonic, |
| 836 | (char *)(cr16_instruction + i)); |
| 837 | |
| 838 | if (hashret != NULL && *hashret != '\0') |
| 839 | as_fatal (_("Can't hash `%s': %s\n"), cr16_instruction[i].mnemonic, |
| 840 | *hashret == 0 ? _("(unknown reason)") : hashret); |
| 841 | |
| 842 | /* Insert unique names into hash table. The CR16 instruction set |
| 843 | has many identical opcode names that have different opcodes based |
| 844 | on the operands. This hash table then provides a quick index to |
| 845 | the first opcode with a particular name in the opcode table. */ |
| 846 | do |
| 847 | { |
| 848 | ++i; |
| 849 | } |
| 850 | while (cr16_instruction[i].mnemonic != NULL |
| 851 | && streq (cr16_instruction[i].mnemonic, mnemonic)); |
| 852 | } |
| 853 | |
| 854 | /* Initialize reg_hash hash table. */ |
| 855 | initialise_reg_hash_table (& reg_hash, cr16_regtab, NUMREGS); |
| 856 | /* Initialize regp_hash hash table. */ |
| 857 | initialise_reg_hash_table (& regp_hash, cr16_regptab, NUMREGPS); |
| 858 | /* Initialize preg_hash hash table. */ |
| 859 | initialise_reg_hash_table (& preg_hash, cr16_pregtab, NUMPREGS); |
| 860 | /* Initialize pregp_hash hash table. */ |
| 861 | initialise_reg_hash_table (& pregp_hash, cr16_pregptab, NUMPREGPS); |
| 862 | |
| 863 | /* Set linkrelax here to avoid fixups in most sections. */ |
| 864 | linkrelax = 1; |
| 865 | } |
| 866 | |
| 867 | /* Process constants (immediate/absolute) |
| 868 | and labels (jump targets/Memory locations). */ |
| 869 | |
| 870 | static void |
| 871 | process_label_constant (char *str, ins * cr16_ins) |
| 872 | { |
| 873 | char *saved_input_line_pointer; |
| 874 | int symbol_with_at = 0; |
| 875 | int symbol_with_s = 0; |
| 876 | int symbol_with_m = 0; |
| 877 | int symbol_with_l = 0; |
| 878 | int symbol_with_at_got = 0; |
| 879 | int symbol_with_at_gotc = 0; |
| 880 | argument *cur_arg = cr16_ins->arg + cur_arg_num; /* Current argument. */ |
| 881 | |
| 882 | saved_input_line_pointer = input_line_pointer; |
| 883 | input_line_pointer = str; |
| 884 | |
| 885 | expression (&cr16_ins->exp); |
| 886 | |
| 887 | switch (cr16_ins->exp.X_op) |
| 888 | { |
| 889 | case O_big: |
| 890 | case O_absent: |
| 891 | /* Missing or bad expr becomes absolute 0. */ |
| 892 | as_bad (_("missing or invalid displacement expression `%s' taken as 0"), |
| 893 | str); |
| 894 | cr16_ins->exp.X_op = O_constant; |
| 895 | cr16_ins->exp.X_add_number = 0; |
| 896 | cr16_ins->exp.X_add_symbol = NULL; |
| 897 | cr16_ins->exp.X_op_symbol = NULL; |
| 898 | /* Fall through. */ |
| 899 | |
| 900 | case O_constant: |
| 901 | cur_arg->X_op = O_constant; |
| 902 | cur_arg->constant = cr16_ins->exp.X_add_number; |
| 903 | break; |
| 904 | |
| 905 | case O_symbol: |
| 906 | case O_subtract: |
| 907 | case O_add: |
| 908 | cur_arg->X_op = O_symbol; |
| 909 | cur_arg->constant = cr16_ins->exp.X_add_number; |
| 910 | cr16_ins->exp.X_add_number = 0; |
| 911 | cr16_ins->rtype = BFD_RELOC_NONE; |
| 912 | relocatable = 1; |
| 913 | |
| 914 | if (strneq (input_line_pointer, "@c", 2)) |
| 915 | symbol_with_at = 1; |
| 916 | |
| 917 | if (strneq (input_line_pointer, "@l", 2) |
| 918 | || strneq (input_line_pointer, ":l", 2)) |
| 919 | symbol_with_l = 1; |
| 920 | |
| 921 | if (strneq (input_line_pointer, "@m", 2) |
| 922 | || strneq (input_line_pointer, ":m", 2)) |
| 923 | symbol_with_m = 1; |
| 924 | |
| 925 | if (strneq (input_line_pointer, "@s", 2) |
| 926 | || strneq (input_line_pointer, ":s", 2)) |
| 927 | symbol_with_s = 1; |
| 928 | |
| 929 | if (strneq (input_line_pointer, "@cGOT", 5) |
| 930 | || strneq (input_line_pointer, "@cgot", 5)) |
| 931 | { |
| 932 | if (GOT_symbol == NULL) |
| 933 | GOT_symbol = symbol_find_or_make (GLOBAL_OFFSET_TABLE_NAME); |
| 934 | |
| 935 | symbol_with_at_gotc = 1; |
| 936 | } |
| 937 | else if (strneq (input_line_pointer, "@GOT", 4) |
| 938 | || strneq (input_line_pointer, "@got", 4)) |
| 939 | { |
| 940 | if ((strneq (input_line_pointer, "+", 1)) |
| 941 | || (strneq (input_line_pointer, "-", 1))) |
| 942 | as_warn (_("GOT bad expression with %s."), input_line_pointer); |
| 943 | |
| 944 | if (GOT_symbol == NULL) |
| 945 | GOT_symbol = symbol_find_or_make (GLOBAL_OFFSET_TABLE_NAME); |
| 946 | |
| 947 | symbol_with_at_got = 1; |
| 948 | } |
| 949 | |
| 950 | switch (cur_arg->type) |
| 951 | { |
| 952 | case arg_cr: |
| 953 | if (IS_INSN_TYPE (LD_STOR_INS) || IS_INSN_TYPE (CSTBIT_INS)) |
| 954 | { |
| 955 | if (symbol_with_at_got) |
| 956 | cr16_ins->rtype = BFD_RELOC_CR16_GOT_REGREL20; |
| 957 | else if (symbol_with_at_gotc) |
| 958 | cr16_ins->rtype = BFD_RELOC_CR16_GOTC_REGREL20; |
| 959 | else if (cur_arg->size == 20) |
| 960 | cr16_ins->rtype = BFD_RELOC_CR16_REGREL20; |
| 961 | else |
| 962 | cr16_ins->rtype = BFD_RELOC_CR16_REGREL20a; |
| 963 | } |
| 964 | break; |
| 965 | |
| 966 | case arg_crp: |
| 967 | if (IS_INSN_TYPE (LD_STOR_INS) || IS_INSN_TYPE (CSTBIT_INS)) |
| 968 | { |
| 969 | if (symbol_with_at_got) |
| 970 | cr16_ins->rtype = BFD_RELOC_CR16_GOT_REGREL20; |
| 971 | else if (symbol_with_at_gotc) |
| 972 | cr16_ins->rtype = BFD_RELOC_CR16_GOTC_REGREL20; |
| 973 | } else { |
| 974 | switch (instruction->size) |
| 975 | { |
| 976 | case 1: |
| 977 | switch (cur_arg->size) |
| 978 | { |
| 979 | case 0: |
| 980 | cr16_ins->rtype = BFD_RELOC_CR16_REGREL0; |
| 981 | break; |
| 982 | case 4: |
| 983 | if (IS_INSN_MNEMONIC ("loadb") || IS_INSN_MNEMONIC ("storb")) |
| 984 | cr16_ins->rtype = BFD_RELOC_CR16_REGREL4; |
| 985 | else |
| 986 | cr16_ins->rtype = BFD_RELOC_CR16_REGREL4a; |
| 987 | break; |
| 988 | default: break; |
| 989 | } |
| 990 | break; |
| 991 | case 2: |
| 992 | cr16_ins->rtype = BFD_RELOC_CR16_REGREL16; |
| 993 | break; |
| 994 | case 3: |
| 995 | if (cur_arg->size == 20) |
| 996 | cr16_ins->rtype = BFD_RELOC_CR16_REGREL20; |
| 997 | else |
| 998 | cr16_ins->rtype = BFD_RELOC_CR16_REGREL20a; |
| 999 | break; |
| 1000 | default: |
| 1001 | break; |
| 1002 | } |
| 1003 | } |
| 1004 | break; |
| 1005 | |
| 1006 | case arg_idxr: |
| 1007 | if (IS_INSN_TYPE (LD_STOR_INS) || IS_INSN_TYPE (CSTBIT_INS)) |
| 1008 | { |
| 1009 | if (symbol_with_at_got) |
| 1010 | cr16_ins->rtype = BFD_RELOC_CR16_GOT_REGREL20; |
| 1011 | else if (symbol_with_at_gotc) |
| 1012 | cr16_ins->rtype = BFD_RELOC_CR16_GOTC_REGREL20; |
| 1013 | else |
| 1014 | cr16_ins->rtype = BFD_RELOC_CR16_REGREL20; |
| 1015 | } |
| 1016 | break; |
| 1017 | |
| 1018 | case arg_idxrp: |
| 1019 | if (IS_INSN_TYPE (LD_STOR_INS) || IS_INSN_TYPE (CSTBIT_INS)) |
| 1020 | { |
| 1021 | if (symbol_with_at_got) |
| 1022 | cr16_ins->rtype = BFD_RELOC_CR16_GOT_REGREL20; |
| 1023 | else if (symbol_with_at_gotc) |
| 1024 | cr16_ins->rtype = BFD_RELOC_CR16_GOTC_REGREL20; |
| 1025 | else { |
| 1026 | switch (instruction->size) |
| 1027 | { |
| 1028 | case 1: cr16_ins->rtype = BFD_RELOC_CR16_REGREL0; break; |
| 1029 | case 2: cr16_ins->rtype = BFD_RELOC_CR16_REGREL14; break; |
| 1030 | case 3: cr16_ins->rtype = BFD_RELOC_CR16_REGREL20; break; |
| 1031 | default: break; |
| 1032 | } |
| 1033 | } |
| 1034 | } |
| 1035 | break; |
| 1036 | |
| 1037 | case arg_c: |
| 1038 | if (IS_INSN_MNEMONIC ("bal")) |
| 1039 | cr16_ins->rtype = BFD_RELOC_CR16_DISP24; |
| 1040 | else if (IS_INSN_TYPE (BRANCH_INS)) |
| 1041 | { |
| 1042 | if (symbol_with_l) |
| 1043 | cr16_ins->rtype = BFD_RELOC_CR16_DISP24; |
| 1044 | else if (symbol_with_m) |
| 1045 | cr16_ins->rtype = BFD_RELOC_CR16_DISP16; |
| 1046 | else |
| 1047 | cr16_ins->rtype = BFD_RELOC_CR16_DISP8; |
| 1048 | } |
| 1049 | else if (IS_INSN_TYPE (STOR_IMM_INS) || IS_INSN_TYPE (LD_STOR_INS) |
| 1050 | || IS_INSN_TYPE (CSTBIT_INS)) |
| 1051 | { |
| 1052 | if (symbol_with_s) |
| 1053 | as_bad (_("operand %d: illegal use expression: `%s`"), cur_arg_num + 1, str); |
| 1054 | if (symbol_with_at_got) |
| 1055 | cr16_ins->rtype = BFD_RELOC_CR16_GOT_REGREL20; |
| 1056 | else if (symbol_with_at_gotc) |
| 1057 | cr16_ins->rtype = BFD_RELOC_CR16_GOTC_REGREL20; |
| 1058 | else if (symbol_with_m) |
| 1059 | cr16_ins->rtype = BFD_RELOC_CR16_ABS20; |
| 1060 | else /* Default to (symbol_with_l) */ |
| 1061 | cr16_ins->rtype = BFD_RELOC_CR16_ABS24; |
| 1062 | } |
| 1063 | else if (IS_INSN_TYPE (BRANCH_NEQ_INS)) |
| 1064 | cr16_ins->rtype = BFD_RELOC_CR16_DISP4; |
| 1065 | break; |
| 1066 | |
| 1067 | case arg_ic: |
| 1068 | if (IS_INSN_TYPE (ARITH_INS)) |
| 1069 | { |
| 1070 | if (symbol_with_at_got) |
| 1071 | cr16_ins->rtype = BFD_RELOC_CR16_GOT_REGREL20; |
| 1072 | else if (symbol_with_at_gotc) |
| 1073 | cr16_ins->rtype = BFD_RELOC_CR16_GOTC_REGREL20; |
| 1074 | else if (symbol_with_s) |
| 1075 | cr16_ins->rtype = BFD_RELOC_CR16_IMM4; |
| 1076 | else if (symbol_with_m) |
| 1077 | cr16_ins->rtype = BFD_RELOC_CR16_IMM20; |
| 1078 | else if (symbol_with_at) |
| 1079 | cr16_ins->rtype = BFD_RELOC_CR16_IMM32a; |
| 1080 | else /* Default to (symbol_with_l) */ |
| 1081 | cr16_ins->rtype = BFD_RELOC_CR16_IMM32; |
| 1082 | } |
| 1083 | else if (IS_INSN_TYPE (ARITH_BYTE_INS)) |
| 1084 | { |
| 1085 | cr16_ins->rtype = BFD_RELOC_CR16_IMM16; |
| 1086 | } |
| 1087 | break; |
| 1088 | default: |
| 1089 | break; |
| 1090 | } |
| 1091 | break; |
| 1092 | |
| 1093 | default: |
| 1094 | cur_arg->X_op = cr16_ins->exp.X_op; |
| 1095 | break; |
| 1096 | } |
| 1097 | |
| 1098 | input_line_pointer = saved_input_line_pointer; |
| 1099 | return; |
| 1100 | } |
| 1101 | |
| 1102 | /* Retrieve the opcode image of a given register. |
| 1103 | If the register is illegal for the current instruction, |
| 1104 | issue an error. */ |
| 1105 | |
| 1106 | static int |
| 1107 | getreg_image (reg r) |
| 1108 | { |
| 1109 | const reg_entry *rreg; |
| 1110 | char *reg_name; |
| 1111 | int is_procreg = 0; /* Nonzero means argument should be processor reg. */ |
| 1112 | |
| 1113 | /* Check whether the register is in registers table. */ |
| 1114 | if (r < MAX_REG) |
| 1115 | rreg = cr16_regtab + r; |
| 1116 | else /* Register not found. */ |
| 1117 | { |
| 1118 | as_bad (_("Unknown register: `%d'"), r); |
| 1119 | return 0; |
| 1120 | } |
| 1121 | |
| 1122 | reg_name = rreg->name; |
| 1123 | |
| 1124 | /* Issue a error message when register is illegal. */ |
| 1125 | #define IMAGE_ERR \ |
| 1126 | as_bad (_("Illegal register (`%s') in Instruction: `%s'"), \ |
| 1127 | reg_name, ins_parse); |
| 1128 | |
| 1129 | switch (rreg->type) |
| 1130 | { |
| 1131 | case CR16_R_REGTYPE: |
| 1132 | if (! is_procreg) |
| 1133 | return rreg->image; |
| 1134 | else |
| 1135 | IMAGE_ERR; |
| 1136 | break; |
| 1137 | |
| 1138 | case CR16_P_REGTYPE: |
| 1139 | return rreg->image; |
| 1140 | break; |
| 1141 | |
| 1142 | default: |
| 1143 | IMAGE_ERR; |
| 1144 | break; |
| 1145 | } |
| 1146 | |
| 1147 | return 0; |
| 1148 | } |
| 1149 | |
| 1150 | /* Parsing different types of operands |
| 1151 | -> constants Immediate/Absolute/Relative numbers |
| 1152 | -> Labels Relocatable symbols |
| 1153 | -> (reg pair base) Register pair base |
| 1154 | -> (rbase) Register base |
| 1155 | -> disp(rbase) Register relative |
| 1156 | -> [rinx]disp(reg pair) Register index with reg pair mode |
| 1157 | -> disp(rbase,ridx,scl) Register index mode. */ |
| 1158 | |
| 1159 | static void |
| 1160 | set_operand (char *operand, ins * cr16_ins) |
| 1161 | { |
| 1162 | char *operandS; /* Pointer to start of sub-operand. */ |
| 1163 | char *operandE; /* Pointer to end of sub-operand. */ |
| 1164 | |
| 1165 | argument *cur_arg = &cr16_ins->arg[cur_arg_num]; /* Current argument. */ |
| 1166 | |
| 1167 | /* Initialize pointers. */ |
| 1168 | operandS = operandE = operand; |
| 1169 | |
| 1170 | switch (cur_arg->type) |
| 1171 | { |
| 1172 | case arg_ic: /* Case $0x18. */ |
| 1173 | operandS++; |
| 1174 | /* Fall through. */ |
| 1175 | case arg_c: /* Case 0x18. */ |
| 1176 | /* Set constant. */ |
| 1177 | process_label_constant (operandS, cr16_ins); |
| 1178 | |
| 1179 | if (cur_arg->type != arg_ic) |
| 1180 | cur_arg->type = arg_c; |
| 1181 | break; |
| 1182 | |
| 1183 | case arg_icr: /* Case $0x18(r1). */ |
| 1184 | operandS++; |
| 1185 | case arg_cr: /* Case 0x18(r1). */ |
| 1186 | /* Set displacement constant. */ |
| 1187 | while (*operandE != '(') |
| 1188 | operandE++; |
| 1189 | *operandE = '\0'; |
| 1190 | process_label_constant (operandS, cr16_ins); |
| 1191 | operandS = operandE; |
| 1192 | /* Fall through. */ |
| 1193 | case arg_rbase: /* Case (r1) or (r1,r0). */ |
| 1194 | operandS++; |
| 1195 | /* Set register base. */ |
| 1196 | while (*operandE != ')') |
| 1197 | operandE++; |
| 1198 | *operandE = '\0'; |
| 1199 | if ((cur_arg->r = get_register (operandS)) == nullregister) |
| 1200 | as_bad (_("Illegal register `%s' in Instruction `%s'"), |
| 1201 | operandS, ins_parse); |
| 1202 | |
| 1203 | /* set the arg->rp, if reg is "r12" or "r13" or "14" or "15" */ |
| 1204 | if ((cur_arg->type != arg_rbase) |
| 1205 | && ((getreg_image (cur_arg->r) == 12) |
| 1206 | || (getreg_image (cur_arg->r) == 13) |
| 1207 | || (getreg_image (cur_arg->r) == 14) |
| 1208 | || (getreg_image (cur_arg->r) == 15))) |
| 1209 | { |
| 1210 | cur_arg->type = arg_crp; |
| 1211 | cur_arg->rp = cur_arg->r; |
| 1212 | } |
| 1213 | break; |
| 1214 | |
| 1215 | case arg_crp: /* Case 0x18(r1,r0). */ |
| 1216 | /* Set displacement constant. */ |
| 1217 | while (*operandE != '(') |
| 1218 | operandE++; |
| 1219 | *operandE = '\0'; |
| 1220 | process_label_constant (operandS, cr16_ins); |
| 1221 | operandS = operandE; |
| 1222 | operandS++; |
| 1223 | /* Set register pair base. */ |
| 1224 | while (*operandE != ')') |
| 1225 | operandE++; |
| 1226 | *operandE = '\0'; |
| 1227 | if ((cur_arg->rp = get_register_pair (operandS)) == nullregister) |
| 1228 | as_bad (_("Illegal register pair `%s' in Instruction `%s'"), |
| 1229 | operandS, ins_parse); |
| 1230 | break; |
| 1231 | |
| 1232 | case arg_idxr: |
| 1233 | /* Set register pair base. */ |
| 1234 | if ((strchr (operandS,'(') != NULL)) |
| 1235 | { |
| 1236 | while ((*operandE != '(') && (! ISSPACE (*operandE))) |
| 1237 | operandE++; |
| 1238 | if ((cur_arg->rp = get_index_register_pair (operandE)) == nullregister) |
| 1239 | as_bad (_("Illegal register pair `%s' in Instruction `%s'"), |
| 1240 | operandS, ins_parse); |
| 1241 | *operandE++ = '\0'; |
| 1242 | cur_arg->type = arg_idxrp; |
| 1243 | } |
| 1244 | else |
| 1245 | cur_arg->rp = -1; |
| 1246 | |
| 1247 | operandE = operandS; |
| 1248 | /* Set displacement constant. */ |
| 1249 | while (*operandE != ']') |
| 1250 | operandE++; |
| 1251 | process_label_constant (++operandE, cr16_ins); |
| 1252 | *operandE++ = '\0'; |
| 1253 | operandE = operandS; |
| 1254 | |
| 1255 | /* Set index register . */ |
| 1256 | operandS = strchr (operandE,'['); |
| 1257 | if (operandS != NULL) |
| 1258 | { /* Eliminate '[', detach from rest of operand. */ |
| 1259 | *operandS++ = '\0'; |
| 1260 | |
| 1261 | operandE = strchr (operandS, ']'); |
| 1262 | |
| 1263 | if (operandE == NULL) |
| 1264 | as_bad (_("unmatched '['")); |
| 1265 | else |
| 1266 | { /* Eliminate ']' and make sure it was the last thing |
| 1267 | in the string. */ |
| 1268 | *operandE = '\0'; |
| 1269 | if (*(operandE + 1) != '\0') |
| 1270 | as_bad (_("garbage after index spec ignored")); |
| 1271 | } |
| 1272 | } |
| 1273 | |
| 1274 | if ((cur_arg->i_r = get_index_register (operandS)) == nullregister) |
| 1275 | as_bad (_("Illegal register `%s' in Instruction `%s'"), |
| 1276 | operandS, ins_parse); |
| 1277 | *operandE = '\0'; |
| 1278 | *operandS = '\0'; |
| 1279 | break; |
| 1280 | |
| 1281 | default: |
| 1282 | break; |
| 1283 | } |
| 1284 | } |
| 1285 | |
| 1286 | /* Parse a single operand. |
| 1287 | operand - Current operand to parse. |
| 1288 | cr16_ins - Current assembled instruction. */ |
| 1289 | |
| 1290 | static void |
| 1291 | parse_operand (char *operand, ins * cr16_ins) |
| 1292 | { |
| 1293 | int ret_val; |
| 1294 | argument *cur_arg = cr16_ins->arg + cur_arg_num; /* Current argument. */ |
| 1295 | |
| 1296 | /* Initialize the type to NULL before parsing. */ |
| 1297 | cur_arg->type = nullargs; |
| 1298 | |
| 1299 | /* Check whether this is a condition code . */ |
| 1300 | if ((IS_INSN_MNEMONIC ("b")) && ((ret_val = get_cc (operand)) != -1)) |
| 1301 | { |
| 1302 | cur_arg->type = arg_cc; |
| 1303 | cur_arg->cc = ret_val; |
| 1304 | cur_arg->X_op = O_register; |
| 1305 | return; |
| 1306 | } |
| 1307 | |
| 1308 | /* Check whether this is a general processor register. */ |
| 1309 | if ((ret_val = get_register (operand)) != nullregister) |
| 1310 | { |
| 1311 | cur_arg->type = arg_r; |
| 1312 | cur_arg->r = ret_val; |
| 1313 | cur_arg->X_op = 0; |
| 1314 | return; |
| 1315 | } |
| 1316 | |
| 1317 | /* Check whether this is a general processor register pair. */ |
| 1318 | if ((operand[0] == '(') |
| 1319 | && ((ret_val = get_register_pair (operand)) != nullregister)) |
| 1320 | { |
| 1321 | cur_arg->type = arg_rp; |
| 1322 | cur_arg->rp = ret_val; |
| 1323 | cur_arg->X_op = O_register; |
| 1324 | return; |
| 1325 | } |
| 1326 | |
| 1327 | /* Check whether the operand is a processor register. |
| 1328 | For "lprd" and "sprd" instruction, only 32 bit |
| 1329 | processor registers used. */ |
| 1330 | if (!(IS_INSN_MNEMONIC ("lprd") || (IS_INSN_MNEMONIC ("sprd"))) |
| 1331 | && ((ret_val = get_pregister (operand)) != nullpregister)) |
| 1332 | { |
| 1333 | cur_arg->type = arg_pr; |
| 1334 | cur_arg->pr = ret_val; |
| 1335 | cur_arg->X_op = O_register; |
| 1336 | return; |
| 1337 | } |
| 1338 | |
| 1339 | /* Check whether this is a processor register - 32 bit. */ |
| 1340 | if ((ret_val = get_pregisterp (operand)) != nullpregister) |
| 1341 | { |
| 1342 | cur_arg->type = arg_prp; |
| 1343 | cur_arg->prp = ret_val; |
| 1344 | cur_arg->X_op = O_register; |
| 1345 | return; |
| 1346 | } |
| 1347 | |
| 1348 | /* Deal with special characters. */ |
| 1349 | switch (operand[0]) |
| 1350 | { |
| 1351 | case '$': |
| 1352 | if (strchr (operand, '(') != NULL) |
| 1353 | cur_arg->type = arg_icr; |
| 1354 | else |
| 1355 | cur_arg->type = arg_ic; |
| 1356 | goto set_params; |
| 1357 | break; |
| 1358 | |
| 1359 | case '(': |
| 1360 | cur_arg->type = arg_rbase; |
| 1361 | goto set_params; |
| 1362 | break; |
| 1363 | |
| 1364 | case '[': |
| 1365 | cur_arg->type = arg_idxr; |
| 1366 | goto set_params; |
| 1367 | break; |
| 1368 | |
| 1369 | default: |
| 1370 | break; |
| 1371 | } |
| 1372 | |
| 1373 | if (strchr (operand, '(') != NULL) |
| 1374 | { |
| 1375 | if (strchr (operand, ',') != NULL |
| 1376 | && (strchr (operand, ',') > strchr (operand, '('))) |
| 1377 | cur_arg->type = arg_crp; |
| 1378 | else |
| 1379 | cur_arg->type = arg_cr; |
| 1380 | } |
| 1381 | else |
| 1382 | cur_arg->type = arg_c; |
| 1383 | |
| 1384 | /* Parse an operand according to its type. */ |
| 1385 | set_params: |
| 1386 | cur_arg->constant = 0; |
| 1387 | set_operand (operand, cr16_ins); |
| 1388 | } |
| 1389 | |
| 1390 | /* Parse the various operands. Each operand is then analyzed to fillup |
| 1391 | the fields in the cr16_ins data structure. */ |
| 1392 | |
| 1393 | static void |
| 1394 | parse_operands (ins * cr16_ins, char *operands) |
| 1395 | { |
| 1396 | char *operandS; /* Operands string. */ |
| 1397 | char *operandH, *operandT; /* Single operand head/tail pointers. */ |
| 1398 | int allocated = 0; /* Indicates a new operands string was allocated.*/ |
| 1399 | char *operand[MAX_OPERANDS];/* Separating the operands. */ |
| 1400 | int op_num = 0; /* Current operand number we are parsing. */ |
| 1401 | int bracket_flag = 0; /* Indicates a bracket '(' was found. */ |
| 1402 | int sq_bracket_flag = 0; /* Indicates a square bracket '[' was found. */ |
| 1403 | |
| 1404 | /* Preprocess the list of registers, if necessary. */ |
| 1405 | operandS = operandH = operandT = operands; |
| 1406 | |
| 1407 | while (*operandT != '\0') |
| 1408 | { |
| 1409 | if (*operandT == ',' && bracket_flag != 1 && sq_bracket_flag != 1) |
| 1410 | { |
| 1411 | *operandT++ = '\0'; |
| 1412 | operand[op_num++] = strdup (operandH); |
| 1413 | operandH = operandT; |
| 1414 | continue; |
| 1415 | } |
| 1416 | |
| 1417 | if (*operandT == ' ') |
| 1418 | as_bad (_("Illegal operands (whitespace): `%s'"), ins_parse); |
| 1419 | |
| 1420 | if (*operandT == '(') |
| 1421 | bracket_flag = 1; |
| 1422 | else if (*operandT == '[') |
| 1423 | sq_bracket_flag = 1; |
| 1424 | |
| 1425 | if (*operandT == ')') |
| 1426 | { |
| 1427 | if (bracket_flag) |
| 1428 | bracket_flag = 0; |
| 1429 | else |
| 1430 | as_fatal (_("Missing matching brackets : `%s'"), ins_parse); |
| 1431 | } |
| 1432 | else if (*operandT == ']') |
| 1433 | { |
| 1434 | if (sq_bracket_flag) |
| 1435 | sq_bracket_flag = 0; |
| 1436 | else |
| 1437 | as_fatal (_("Missing matching brackets : `%s'"), ins_parse); |
| 1438 | } |
| 1439 | |
| 1440 | if (bracket_flag == 1 && *operandT == ')') |
| 1441 | bracket_flag = 0; |
| 1442 | else if (sq_bracket_flag == 1 && *operandT == ']') |
| 1443 | sq_bracket_flag = 0; |
| 1444 | |
| 1445 | operandT++; |
| 1446 | } |
| 1447 | |
| 1448 | /* Adding the last operand. */ |
| 1449 | operand[op_num++] = strdup (operandH); |
| 1450 | cr16_ins->nargs = op_num; |
| 1451 | |
| 1452 | /* Verifying correct syntax of operands (all brackets should be closed). */ |
| 1453 | if (bracket_flag || sq_bracket_flag) |
| 1454 | as_fatal (_("Missing matching brackets : `%s'"), ins_parse); |
| 1455 | |
| 1456 | /* Now we parse each operand separately. */ |
| 1457 | for (op_num = 0; op_num < cr16_ins->nargs; op_num++) |
| 1458 | { |
| 1459 | cur_arg_num = op_num; |
| 1460 | parse_operand (operand[op_num], cr16_ins); |
| 1461 | free (operand[op_num]); |
| 1462 | } |
| 1463 | |
| 1464 | if (allocated) |
| 1465 | free (operandS); |
| 1466 | } |
| 1467 | |
| 1468 | /* Get the trap index in dispatch table, given its name. |
| 1469 | This routine is used by assembling the 'excp' instruction. */ |
| 1470 | |
| 1471 | static int |
| 1472 | gettrap (char *s) |
| 1473 | { |
| 1474 | const trap_entry *trap; |
| 1475 | |
| 1476 | for (trap = cr16_traps; trap < (cr16_traps + NUMTRAPS); trap++) |
| 1477 | if (strcasecmp (trap->name, s) == 0) |
| 1478 | return trap->entry; |
| 1479 | |
| 1480 | /* To make compatible with CR16 4.1 tools, the below 3-lines of |
| 1481 | * code added. Refer: Development Tracker item #123 */ |
| 1482 | for (trap = cr16_traps; trap < (cr16_traps + NUMTRAPS); trap++) |
| 1483 | if (trap->entry == (unsigned int) atoi (s)) |
| 1484 | return trap->entry; |
| 1485 | |
| 1486 | as_bad (_("Unknown exception: `%s'"), s); |
| 1487 | return 0; |
| 1488 | } |
| 1489 | |
| 1490 | /* Top level module where instruction parsing starts. |
| 1491 | cr16_ins - data structure holds some information. |
| 1492 | operands - holds the operands part of the whole instruction. */ |
| 1493 | |
| 1494 | static void |
| 1495 | parse_insn (ins *insn, char *operands) |
| 1496 | { |
| 1497 | int i; |
| 1498 | |
| 1499 | /* Handle instructions with no operands. */ |
| 1500 | for (i = 0; cr16_no_op_insn[i] != NULL; i++) |
| 1501 | { |
| 1502 | if (streq (cr16_no_op_insn[i], instruction->mnemonic)) |
| 1503 | { |
| 1504 | insn->nargs = 0; |
| 1505 | return; |
| 1506 | } |
| 1507 | } |
| 1508 | |
| 1509 | /* Handle 'excp' instructions. */ |
| 1510 | if (IS_INSN_MNEMONIC ("excp")) |
| 1511 | { |
| 1512 | insn->nargs = 1; |
| 1513 | insn->arg[0].type = arg_ic; |
| 1514 | insn->arg[0].constant = gettrap (operands); |
| 1515 | insn->arg[0].X_op = O_constant; |
| 1516 | return; |
| 1517 | } |
| 1518 | |
| 1519 | if (operands != NULL) |
| 1520 | parse_operands (insn, operands); |
| 1521 | } |
| 1522 | |
| 1523 | /* bCC instruction requires special handling. */ |
| 1524 | static char * |
| 1525 | get_b_cc (char * op) |
| 1526 | { |
| 1527 | unsigned int i; |
| 1528 | char op1[5]; |
| 1529 | |
| 1530 | for (i = 1; i < strlen (op); i++) |
| 1531 | op1[i-1] = op[i]; |
| 1532 | |
| 1533 | op1[i-1] = '\0'; |
| 1534 | |
| 1535 | for (i = 0; i < cr16_num_cc ; i++) |
| 1536 | if (streq (op1, cr16_b_cond_tab[i])) |
| 1537 | return (char *) cr16_b_cond_tab[i]; |
| 1538 | |
| 1539 | return NULL; |
| 1540 | } |
| 1541 | |
| 1542 | /* bCC instruction requires special handling. */ |
| 1543 | static int |
| 1544 | is_bcc_insn (char * op) |
| 1545 | { |
| 1546 | if (!(streq (op, "bal") || streq (op, "beq0b") || streq (op, "bnq0b") |
| 1547 | || streq (op, "beq0w") || streq (op, "bnq0w"))) |
| 1548 | if ((op[0] == 'b') && (get_b_cc (op) != NULL)) |
| 1549 | return 1; |
| 1550 | return 0; |
| 1551 | } |
| 1552 | |
| 1553 | /* Cinv instruction requires special handling. */ |
| 1554 | |
| 1555 | static void |
| 1556 | check_cinv_options (char * operand) |
| 1557 | { |
| 1558 | char *p = operand; |
| 1559 | |
| 1560 | while (*++p != ']') |
| 1561 | { |
| 1562 | switch (*p) |
| 1563 | { |
| 1564 | case ',': |
| 1565 | case ' ': |
| 1566 | case 'i': |
| 1567 | case 'u': |
| 1568 | case 'd': |
| 1569 | break; |
| 1570 | default: |
| 1571 | as_bad (_("Illegal `cinv' parameter: `%c'"), *p); |
| 1572 | } |
| 1573 | } |
| 1574 | } |
| 1575 | |
| 1576 | /* Retrieve the opcode image of a given register pair. |
| 1577 | If the register is illegal for the current instruction, |
| 1578 | issue an error. */ |
| 1579 | |
| 1580 | static int |
| 1581 | getregp_image (reg r) |
| 1582 | { |
| 1583 | const reg_entry *rreg; |
| 1584 | char *reg_name; |
| 1585 | |
| 1586 | /* Check whether the register is in registers table. */ |
| 1587 | if (r < MAX_REG) |
| 1588 | rreg = cr16_regptab + r; |
| 1589 | /* Register not found. */ |
| 1590 | else |
| 1591 | { |
| 1592 | as_bad (_("Unknown register pair: `%d'"), r); |
| 1593 | return 0; |
| 1594 | } |
| 1595 | |
| 1596 | reg_name = rreg->name; |
| 1597 | |
| 1598 | /* Issue a error message when register pair is illegal. */ |
| 1599 | #define RPAIR_IMAGE_ERR \ |
| 1600 | as_bad (_("Illegal register pair (`%s') in Instruction: `%s'"), \ |
| 1601 | reg_name, ins_parse); \ |
| 1602 | break; |
| 1603 | |
| 1604 | switch (rreg->type) |
| 1605 | { |
| 1606 | case CR16_RP_REGTYPE: |
| 1607 | return rreg->image; |
| 1608 | default: |
| 1609 | RPAIR_IMAGE_ERR; |
| 1610 | } |
| 1611 | |
| 1612 | return 0; |
| 1613 | } |
| 1614 | |
| 1615 | /* Retrieve the opcode image of a given index register pair. |
| 1616 | If the register is illegal for the current instruction, |
| 1617 | issue an error. */ |
| 1618 | |
| 1619 | static int |
| 1620 | getidxregp_image (reg r) |
| 1621 | { |
| 1622 | const reg_entry *rreg; |
| 1623 | char *reg_name; |
| 1624 | |
| 1625 | /* Check whether the register is in registers table. */ |
| 1626 | if (r < MAX_REG) |
| 1627 | rreg = cr16_regptab + r; |
| 1628 | /* Register not found. */ |
| 1629 | else |
| 1630 | { |
| 1631 | as_bad (_("Unknown register pair: `%d'"), r); |
| 1632 | return 0; |
| 1633 | } |
| 1634 | |
| 1635 | reg_name = rreg->name; |
| 1636 | |
| 1637 | /* Issue a error message when register pair is illegal. */ |
| 1638 | #define IDX_RPAIR_IMAGE_ERR \ |
| 1639 | as_bad (_("Illegal index register pair (`%s') in Instruction: `%s'"), \ |
| 1640 | reg_name, ins_parse); \ |
| 1641 | |
| 1642 | if (rreg->type == CR16_RP_REGTYPE) |
| 1643 | { |
| 1644 | switch (rreg->image) |
| 1645 | { |
| 1646 | case 0: return 0; break; |
| 1647 | case 2: return 1; break; |
| 1648 | case 4: return 2; break; |
| 1649 | case 6: return 3; break; |
| 1650 | case 8: return 4; break; |
| 1651 | case 10: return 5; break; |
| 1652 | case 3: return 6; break; |
| 1653 | case 5: return 7; break; |
| 1654 | default: |
| 1655 | break; |
| 1656 | } |
| 1657 | } |
| 1658 | |
| 1659 | IDX_RPAIR_IMAGE_ERR; |
| 1660 | return 0; |
| 1661 | } |
| 1662 | |
| 1663 | /* Retrieve the opcode image of a given processor register. |
| 1664 | If the register is illegal for the current instruction, |
| 1665 | issue an error. */ |
| 1666 | static int |
| 1667 | getprocreg_image (int r) |
| 1668 | { |
| 1669 | const reg_entry *rreg; |
| 1670 | char *reg_name; |
| 1671 | |
| 1672 | /* Check whether the register is in registers table. */ |
| 1673 | if (r >= MAX_REG && r < MAX_PREG) |
| 1674 | rreg = &cr16_pregtab[r - MAX_REG]; |
| 1675 | /* Register not found. */ |
| 1676 | else |
| 1677 | { |
| 1678 | as_bad (_("Unknown processor register : `%d'"), r); |
| 1679 | return 0; |
| 1680 | } |
| 1681 | |
| 1682 | reg_name = rreg->name; |
| 1683 | |
| 1684 | /* Issue a error message when register pair is illegal. */ |
| 1685 | #define PROCREG_IMAGE_ERR \ |
| 1686 | as_bad (_("Illegal processor register (`%s') in Instruction: `%s'"), \ |
| 1687 | reg_name, ins_parse); \ |
| 1688 | break; |
| 1689 | |
| 1690 | switch (rreg->type) |
| 1691 | { |
| 1692 | case CR16_P_REGTYPE: |
| 1693 | return rreg->image; |
| 1694 | default: |
| 1695 | PROCREG_IMAGE_ERR; |
| 1696 | } |
| 1697 | |
| 1698 | return 0; |
| 1699 | } |
| 1700 | |
| 1701 | /* Retrieve the opcode image of a given processor register. |
| 1702 | If the register is illegal for the current instruction, |
| 1703 | issue an error. */ |
| 1704 | static int |
| 1705 | getprocregp_image (int r) |
| 1706 | { |
| 1707 | const reg_entry *rreg; |
| 1708 | char *reg_name; |
| 1709 | int pregptab_disp = 0; |
| 1710 | |
| 1711 | /* Check whether the register is in registers table. */ |
| 1712 | if (r >= MAX_REG && r < MAX_PREG) |
| 1713 | { |
| 1714 | r = r - MAX_REG; |
| 1715 | switch (r) |
| 1716 | { |
| 1717 | case 4: pregptab_disp = 1; break; |
| 1718 | case 6: pregptab_disp = 2; break; |
| 1719 | case 8: |
| 1720 | case 9: |
| 1721 | case 10: |
| 1722 | pregptab_disp = 3; break; |
| 1723 | case 12: |
| 1724 | pregptab_disp = 4; break; |
| 1725 | case 14: |
| 1726 | pregptab_disp = 5; break; |
| 1727 | default: break; |
| 1728 | } |
| 1729 | rreg = &cr16_pregptab[r - pregptab_disp]; |
| 1730 | } |
| 1731 | /* Register not found. */ |
| 1732 | else |
| 1733 | { |
| 1734 | as_bad (_("Unknown processor register (32 bit) : `%d'"), r); |
| 1735 | return 0; |
| 1736 | } |
| 1737 | |
| 1738 | reg_name = rreg->name; |
| 1739 | |
| 1740 | /* Issue a error message when register pair is illegal. */ |
| 1741 | #define PROCREGP_IMAGE_ERR \ |
| 1742 | as_bad (_("Illegal 32 bit - processor register (`%s') in Instruction: `%s'"),\ |
| 1743 | reg_name, ins_parse); \ |
| 1744 | break; |
| 1745 | |
| 1746 | switch (rreg->type) |
| 1747 | { |
| 1748 | case CR16_P_REGTYPE: |
| 1749 | return rreg->image; |
| 1750 | default: |
| 1751 | PROCREGP_IMAGE_ERR; |
| 1752 | } |
| 1753 | |
| 1754 | return 0; |
| 1755 | } |
| 1756 | |
| 1757 | /* Routine used to represent integer X using NBITS bits. */ |
| 1758 | |
| 1759 | static long |
| 1760 | getconstant (long x, int nbits) |
| 1761 | { |
| 1762 | /* The following expression avoids overflow if |
| 1763 | 'nbits' is the number of bits in 'bfd_vma'. */ |
| 1764 | return (x & ((((1 << (nbits - 1)) - 1) << 1) | 1)); |
| 1765 | } |
| 1766 | |
| 1767 | /* Print a constant value to 'output_opcode': |
| 1768 | ARG holds the operand's type and value. |
| 1769 | SHIFT represents the location of the operand to be print into. |
| 1770 | NBITS determines the size (in bits) of the constant. */ |
| 1771 | |
| 1772 | static void |
| 1773 | print_constant (int nbits, int shift, argument *arg) |
| 1774 | { |
| 1775 | unsigned long mask = 0; |
| 1776 | |
| 1777 | long constant = getconstant (arg->constant, nbits); |
| 1778 | |
| 1779 | switch (nbits) |
| 1780 | { |
| 1781 | case 32: |
| 1782 | case 28: |
| 1783 | /* mask the upper part of the constant, that is, the bits |
| 1784 | going to the lowest byte of output_opcode[0]. |
| 1785 | The upper part of output_opcode[1] is always filled, |
| 1786 | therefore it is always masked with 0xFFFF. */ |
| 1787 | mask = (1 << (nbits - 16)) - 1; |
| 1788 | /* Divide the constant between two consecutive words : |
| 1789 | 0 1 2 3 |
| 1790 | +---------+---------+---------+---------+ |
| 1791 | | | X X X X | x X x X | | |
| 1792 | +---------+---------+---------+---------+ |
| 1793 | output_opcode[0] output_opcode[1] */ |
| 1794 | |
| 1795 | CR16_PRINT (0, (constant >> WORD_SHIFT) & mask, 0); |
| 1796 | CR16_PRINT (1, (constant & 0xFFFF), WORD_SHIFT); |
| 1797 | break; |
| 1798 | |
| 1799 | case 21: |
| 1800 | if ((nbits == 21) && (IS_INSN_TYPE (LD_STOR_INS))) |
| 1801 | nbits = 20; |
| 1802 | /* Fall through. */ |
| 1803 | case 24: |
| 1804 | case 22: |
| 1805 | case 20: |
| 1806 | /* mask the upper part of the constant, that is, the bits |
| 1807 | going to the lowest byte of output_opcode[0]. |
| 1808 | The upper part of output_opcode[1] is always filled, |
| 1809 | therefore it is always masked with 0xFFFF. */ |
| 1810 | mask = (1 << (nbits - 16)) - 1; |
| 1811 | /* Divide the constant between two consecutive words : |
| 1812 | 0 1 2 3 |
| 1813 | +---------+---------+---------+---------+ |
| 1814 | | | X X X X | - X - X | | |
| 1815 | +---------+---------+---------+---------+ |
| 1816 | output_opcode[0] output_opcode[1] */ |
| 1817 | |
| 1818 | if ((instruction->size > 2) && (shift == WORD_SHIFT)) |
| 1819 | { |
| 1820 | if (arg->type == arg_idxrp) |
| 1821 | { |
| 1822 | CR16_PRINT (0, ((constant >> WORD_SHIFT) & mask) << 8, 0); |
| 1823 | CR16_PRINT (1, (constant & 0xFFFF), WORD_SHIFT); |
| 1824 | } |
| 1825 | else |
| 1826 | { |
| 1827 | CR16_PRINT (0, (((((constant >> WORD_SHIFT) & mask) << 8) & 0x0f00) | ((((constant >> WORD_SHIFT) & mask) >> 4) & 0xf)),0); |
| 1828 | CR16_PRINT (1, (constant & 0xFFFF), WORD_SHIFT); |
| 1829 | } |
| 1830 | } |
| 1831 | else |
| 1832 | CR16_PRINT (0, constant, shift); |
| 1833 | break; |
| 1834 | |
| 1835 | case 14: |
| 1836 | if (arg->type == arg_idxrp) |
| 1837 | { |
| 1838 | if (instruction->size == 2) |
| 1839 | { |
| 1840 | CR16_PRINT (0, ((constant) & 0xf), shift); /* 0-3 bits. */ |
| 1841 | CR16_PRINT (0, ((constant >> 4) & 0x3), (shift + 20)); /* 4-5 bits. */ |
| 1842 | CR16_PRINT (0, ((constant >> 6) & 0x3), (shift + 14)); /* 6-7 bits. */ |
| 1843 | CR16_PRINT (0, ((constant >> 8) & 0x3f), (shift + 8)); /* 8-13 bits. */ |
| 1844 | } |
| 1845 | else |
| 1846 | CR16_PRINT (0, constant, shift); |
| 1847 | } |
| 1848 | break; |
| 1849 | |
| 1850 | case 16: |
| 1851 | case 12: |
| 1852 | /* When instruction size is 3 and 'shift' is 16, a 16-bit constant is |
| 1853 | always filling the upper part of output_opcode[1]. If we mistakenly |
| 1854 | write it to output_opcode[0], the constant prefix (that is, 'match') |
| 1855 | will be overridden. |
| 1856 | 0 1 2 3 |
| 1857 | +---------+---------+---------+---------+ |
| 1858 | | 'match' | | X X X X | | |
| 1859 | +---------+---------+---------+---------+ |
| 1860 | output_opcode[0] output_opcode[1] */ |
| 1861 | |
| 1862 | if ((instruction->size > 2) && (shift == WORD_SHIFT)) |
| 1863 | CR16_PRINT (1, constant, WORD_SHIFT); |
| 1864 | else |
| 1865 | CR16_PRINT (0, constant, shift); |
| 1866 | break; |
| 1867 | |
| 1868 | case 8: |
| 1869 | CR16_PRINT (0, ((constant / 2) & 0xf), shift); |
| 1870 | CR16_PRINT (0, ((constant / 2) >> 4), (shift + 8)); |
| 1871 | break; |
| 1872 | |
| 1873 | default: |
| 1874 | CR16_PRINT (0, constant, shift); |
| 1875 | break; |
| 1876 | } |
| 1877 | } |
| 1878 | |
| 1879 | /* Print an operand to 'output_opcode', which later on will be |
| 1880 | printed to the object file: |
| 1881 | ARG holds the operand's type, size and value. |
| 1882 | SHIFT represents the printing location of operand. |
| 1883 | NBITS determines the size (in bits) of a constant operand. */ |
| 1884 | |
| 1885 | static void |
| 1886 | print_operand (int nbits, int shift, argument *arg) |
| 1887 | { |
| 1888 | switch (arg->type) |
| 1889 | { |
| 1890 | case arg_cc: |
| 1891 | CR16_PRINT (0, arg->cc, shift); |
| 1892 | break; |
| 1893 | |
| 1894 | case arg_r: |
| 1895 | CR16_PRINT (0, getreg_image (arg->r), shift); |
| 1896 | break; |
| 1897 | |
| 1898 | case arg_rp: |
| 1899 | CR16_PRINT (0, getregp_image (arg->rp), shift); |
| 1900 | break; |
| 1901 | |
| 1902 | case arg_pr: |
| 1903 | CR16_PRINT (0, getprocreg_image (arg->pr), shift); |
| 1904 | break; |
| 1905 | |
| 1906 | case arg_prp: |
| 1907 | CR16_PRINT (0, getprocregp_image (arg->prp), shift); |
| 1908 | break; |
| 1909 | |
| 1910 | case arg_idxrp: |
| 1911 | /* 16 12 8 6 0 |
| 1912 | +-----------------------------+ |
| 1913 | | r_index | disp | rp_base | |
| 1914 | +-----------------------------+ */ |
| 1915 | |
| 1916 | if (instruction->size == 3) |
| 1917 | { |
| 1918 | CR16_PRINT (0, getidxregp_image (arg->rp), 0); |
| 1919 | if (getreg_image (arg->i_r) == 12) |
| 1920 | CR16_PRINT (0, 0, 3); |
| 1921 | else |
| 1922 | CR16_PRINT (0, 1, 3); |
| 1923 | } |
| 1924 | else |
| 1925 | { |
| 1926 | CR16_PRINT (0, getidxregp_image (arg->rp), 16); |
| 1927 | if (getreg_image (arg->i_r) == 12) |
| 1928 | CR16_PRINT (0, 0, 19); |
| 1929 | else |
| 1930 | CR16_PRINT (0, 1, 19); |
| 1931 | } |
| 1932 | print_constant (nbits, shift, arg); |
| 1933 | break; |
| 1934 | |
| 1935 | case arg_idxr: |
| 1936 | if (getreg_image (arg->i_r) == 12) |
| 1937 | if (IS_INSN_MNEMONIC ("cbitb") || IS_INSN_MNEMONIC ("sbitb") |
| 1938 | || IS_INSN_MNEMONIC ("tbitb")) |
| 1939 | CR16_PRINT (0, 0, 23); |
| 1940 | else CR16_PRINT (0, 0, 24); |
| 1941 | else |
| 1942 | if (IS_INSN_MNEMONIC ("cbitb") || IS_INSN_MNEMONIC ("sbitb") |
| 1943 | || IS_INSN_MNEMONIC ("tbitb")) |
| 1944 | CR16_PRINT (0, 1, 23); |
| 1945 | else CR16_PRINT (0, 1, 24); |
| 1946 | |
| 1947 | print_constant (nbits, shift, arg); |
| 1948 | break; |
| 1949 | |
| 1950 | case arg_ic: |
| 1951 | case arg_c: |
| 1952 | print_constant (nbits, shift, arg); |
| 1953 | break; |
| 1954 | |
| 1955 | case arg_rbase: |
| 1956 | CR16_PRINT (0, getreg_image (arg->r), shift); |
| 1957 | break; |
| 1958 | |
| 1959 | case arg_cr: |
| 1960 | print_constant (nbits, shift , arg); |
| 1961 | /* Add the register argument to the output_opcode. */ |
| 1962 | CR16_PRINT (0, getreg_image (arg->r), (shift+16)); |
| 1963 | break; |
| 1964 | |
| 1965 | case arg_crp: |
| 1966 | print_constant (nbits, shift , arg); |
| 1967 | if (instruction->size > 1) |
| 1968 | CR16_PRINT (0, getregp_image (arg->rp), (shift + 16)); |
| 1969 | else if (IS_INSN_TYPE (LD_STOR_INS) || (IS_INSN_TYPE (CSTBIT_INS))) |
| 1970 | { |
| 1971 | if (instruction->size == 2) |
| 1972 | CR16_PRINT (0, getregp_image (arg->rp), (shift - 8)); |
| 1973 | else if (instruction->size == 1) |
| 1974 | CR16_PRINT (0, getregp_image (arg->rp), 16); |
| 1975 | } |
| 1976 | else |
| 1977 | CR16_PRINT (0, getregp_image (arg->rp), shift); |
| 1978 | break; |
| 1979 | |
| 1980 | default: |
| 1981 | break; |
| 1982 | } |
| 1983 | } |
| 1984 | |
| 1985 | /* Retrieve the number of operands for the current assembled instruction. */ |
| 1986 | |
| 1987 | static int |
| 1988 | get_number_of_operands (void) |
| 1989 | { |
| 1990 | int i; |
| 1991 | |
| 1992 | for (i = 0; instruction->operands[i].op_type && i < MAX_OPERANDS; i++) |
| 1993 | ; |
| 1994 | return i; |
| 1995 | } |
| 1996 | |
| 1997 | /* Verify that the number NUM can be represented in BITS bits (that is, |
| 1998 | within its permitted range), based on the instruction's FLAGS. |
| 1999 | If UPDATE is nonzero, update the value of NUM if necessary. |
| 2000 | Return OP_LEGAL upon success, actual error type upon failure. */ |
| 2001 | |
| 2002 | static op_err |
| 2003 | check_range (long *num, int bits, int unsigned flags, int update) |
| 2004 | { |
| 2005 | long min, max; |
| 2006 | op_err retval = OP_LEGAL; |
| 2007 | long value = *num; |
| 2008 | |
| 2009 | if (bits == 0 && value > 0) return OP_OUT_OF_RANGE; |
| 2010 | |
| 2011 | /* For hosts with longs bigger than 32-bits make sure that the top |
| 2012 | bits of a 32-bit negative value read in by the parser are set, |
| 2013 | so that the correct comparisons are made. */ |
| 2014 | if (value & 0x80000000) |
| 2015 | value |= (-1UL << 31); |
| 2016 | |
| 2017 | |
| 2018 | /* Verify operand value is even. */ |
| 2019 | if (flags & OP_EVEN) |
| 2020 | { |
| 2021 | if (value % 2) |
| 2022 | return OP_NOT_EVEN; |
| 2023 | } |
| 2024 | |
| 2025 | if (flags & OP_DEC) |
| 2026 | { |
| 2027 | value -= 1; |
| 2028 | if (update) |
| 2029 | *num = value; |
| 2030 | } |
| 2031 | |
| 2032 | if (flags & OP_SHIFT) |
| 2033 | { |
| 2034 | value >>= 1; |
| 2035 | if (update) |
| 2036 | *num = value; |
| 2037 | } |
| 2038 | else if (flags & OP_SHIFT_DEC) |
| 2039 | { |
| 2040 | value = (value >> 1) - 1; |
| 2041 | if (update) |
| 2042 | *num = value; |
| 2043 | } |
| 2044 | |
| 2045 | if (flags & OP_ABS20) |
| 2046 | { |
| 2047 | if (value > 0xEFFFF) |
| 2048 | return OP_OUT_OF_RANGE; |
| 2049 | } |
| 2050 | |
| 2051 | if (flags & OP_ESC) |
| 2052 | { |
| 2053 | if (value == 0xB || value == 0x9) |
| 2054 | return OP_OUT_OF_RANGE; |
| 2055 | else if (value == -1) |
| 2056 | { |
| 2057 | if (update) |
| 2058 | *num = 9; |
| 2059 | return retval; |
| 2060 | } |
| 2061 | } |
| 2062 | |
| 2063 | if (flags & OP_ESC1) |
| 2064 | { |
| 2065 | if (value > 13) |
| 2066 | return OP_OUT_OF_RANGE; |
| 2067 | } |
| 2068 | |
| 2069 | if (flags & OP_SIGNED) |
| 2070 | { |
| 2071 | max = (1 << (bits - 1)) - 1; |
| 2072 | min = - (1 << (bits - 1)); |
| 2073 | if ((value > max) || (value < min)) |
| 2074 | retval = OP_OUT_OF_RANGE; |
| 2075 | } |
| 2076 | else if (flags & OP_UNSIGNED) |
| 2077 | { |
| 2078 | max = ((((1 << (bits - 1)) - 1) << 1) | 1); |
| 2079 | min = 0; |
| 2080 | if (((unsigned long) value > (unsigned long) max) |
| 2081 | || ((unsigned long) value < (unsigned long) min)) |
| 2082 | retval = OP_OUT_OF_RANGE; |
| 2083 | } |
| 2084 | else if (flags & OP_NEG) |
| 2085 | { |
| 2086 | max = - 1; |
| 2087 | min = - ((1 << (bits - 1)) - 1); |
| 2088 | if ((value > max) || (value < min)) |
| 2089 | retval = OP_OUT_OF_RANGE; |
| 2090 | } |
| 2091 | return retval; |
| 2092 | } |
| 2093 | |
| 2094 | /* Bunch of error checking. |
| 2095 | The checks are made after a matching instruction was found. */ |
| 2096 | |
| 2097 | static void |
| 2098 | warn_if_needed (ins *insn) |
| 2099 | { |
| 2100 | /* If the post-increment address mode is used and the load/store |
| 2101 | source register is the same as rbase, the result of the |
| 2102 | instruction is undefined. */ |
| 2103 | if (IS_INSN_TYPE (LD_STOR_INS_INC)) |
| 2104 | { |
| 2105 | /* Enough to verify that one of the arguments is a simple reg. */ |
| 2106 | if ((insn->arg[0].type == arg_r) || (insn->arg[1].type == arg_r)) |
| 2107 | if (insn->arg[0].r == insn->arg[1].r) |
| 2108 | as_bad (_("Same src/dest register is used (`r%d'), result is undefined"), insn->arg[0].r); |
| 2109 | } |
| 2110 | |
| 2111 | if (IS_INSN_MNEMONIC ("pop") |
| 2112 | || IS_INSN_MNEMONIC ("push") |
| 2113 | || IS_INSN_MNEMONIC ("popret")) |
| 2114 | { |
| 2115 | unsigned int count = insn->arg[0].constant, reg_val; |
| 2116 | |
| 2117 | /* Check if count operand caused to save/retrieve the RA twice |
| 2118 | to generate warning message. */ |
| 2119 | if (insn->nargs > 2) |
| 2120 | { |
| 2121 | reg_val = getreg_image (insn->arg[1].r); |
| 2122 | |
| 2123 | if ( ((reg_val == 9) && (count > 7)) |
| 2124 | || ((reg_val == 10) && (count > 6)) |
| 2125 | || ((reg_val == 11) && (count > 5)) |
| 2126 | || ((reg_val == 12) && (count > 4)) |
| 2127 | || ((reg_val == 13) && (count > 2)) |
| 2128 | || ((reg_val == 14) && (count > 0))) |
| 2129 | as_warn (_("RA register is saved twice.")); |
| 2130 | |
| 2131 | /* Check if the third operand is "RA" or "ra" */ |
| 2132 | if (!(((insn->arg[2].r) == ra) || ((insn->arg[2].r) == RA))) |
| 2133 | as_bad (_("`%s' Illegal use of registers."), ins_parse); |
| 2134 | } |
| 2135 | |
| 2136 | if (insn->nargs > 1) |
| 2137 | { |
| 2138 | reg_val = getreg_image (insn->arg[1].r); |
| 2139 | |
| 2140 | /* If register is a register pair ie r12/r13/r14 in operand1, then |
| 2141 | the count constant should be validated. */ |
| 2142 | if (((reg_val == 11) && (count > 7)) |
| 2143 | || ((reg_val == 12) && (count > 6)) |
| 2144 | || ((reg_val == 13) && (count > 4)) |
| 2145 | || ((reg_val == 14) && (count > 2)) |
| 2146 | || ((reg_val == 15) && (count > 0))) |
| 2147 | as_bad (_("`%s' Illegal count-register combination."), ins_parse); |
| 2148 | } |
| 2149 | else |
| 2150 | { |
| 2151 | /* Check if the operand is "RA" or "ra" */ |
| 2152 | if (!(((insn->arg[0].r) == ra) || ((insn->arg[0].r) == RA))) |
| 2153 | as_bad (_("`%s' Illegal use of register."), ins_parse); |
| 2154 | } |
| 2155 | } |
| 2156 | |
| 2157 | /* Some instruction assume the stack pointer as rptr operand. |
| 2158 | Issue an error when the register to be loaded is also SP. */ |
| 2159 | if (instruction->flags & NO_SP) |
| 2160 | { |
| 2161 | if (getreg_image (insn->arg[1].r) == getreg_image (sp)) |
| 2162 | as_bad (_("`%s' has undefined result"), ins_parse); |
| 2163 | } |
| 2164 | |
| 2165 | /* If the rptr register is specified as one of the registers to be loaded, |
| 2166 | the final contents of rptr are undefined. Thus, we issue an error. */ |
| 2167 | if (instruction->flags & NO_RPTR) |
| 2168 | { |
| 2169 | if ((1 << getreg_image (insn->arg[0].r)) & insn->arg[1].constant) |
| 2170 | as_bad (_("Same src/dest register is used (`r%d'),result is undefined"), |
| 2171 | getreg_image (insn->arg[0].r)); |
| 2172 | } |
| 2173 | } |
| 2174 | |
| 2175 | /* In some cases, we need to adjust the instruction pointer although a |
| 2176 | match was already found. Here, we gather all these cases. |
| 2177 | Returns 1 if instruction pointer was adjusted, otherwise 0. */ |
| 2178 | |
| 2179 | static int |
| 2180 | adjust_if_needed (ins *insn ATTRIBUTE_UNUSED) |
| 2181 | { |
| 2182 | int ret_value = 0; |
| 2183 | |
| 2184 | if ((IS_INSN_TYPE (CSTBIT_INS)) || (IS_INSN_TYPE (LD_STOR_INS))) |
| 2185 | { |
| 2186 | if ((instruction->operands[0].op_type == abs24) |
| 2187 | && ((insn->arg[0].constant) > 0xF00000)) |
| 2188 | { |
| 2189 | insn->arg[0].constant &= 0xFFFFF; |
| 2190 | instruction--; |
| 2191 | ret_value = 1; |
| 2192 | } |
| 2193 | } |
| 2194 | |
| 2195 | return ret_value; |
| 2196 | } |
| 2197 | |
| 2198 | /* Assemble a single instruction: |
| 2199 | INSN is already parsed (that is, all operand values and types are set). |
| 2200 | For instruction to be assembled, we need to find an appropriate template in |
| 2201 | the instruction table, meeting the following conditions: |
| 2202 | 1: Has the same number of operands. |
| 2203 | 2: Has the same operand types. |
| 2204 | 3: Each operand size is sufficient to represent the instruction's values. |
| 2205 | Returns 1 upon success, 0 upon failure. */ |
| 2206 | |
| 2207 | static int |
| 2208 | assemble_insn (const char *mnemonic, ins *insn) |
| 2209 | { |
| 2210 | /* Type of each operand in the current template. */ |
| 2211 | argtype cur_type[MAX_OPERANDS]; |
| 2212 | /* Size (in bits) of each operand in the current template. */ |
| 2213 | unsigned int cur_size[MAX_OPERANDS]; |
| 2214 | /* Flags of each operand in the current template. */ |
| 2215 | unsigned int cur_flags[MAX_OPERANDS]; |
| 2216 | /* Instruction type to match. */ |
| 2217 | unsigned int ins_type; |
| 2218 | /* Boolean flag to mark whether a match was found. */ |
| 2219 | int match = 0; |
| 2220 | int i; |
| 2221 | /* Nonzero if an instruction with same number of operands was found. */ |
| 2222 | int found_same_number_of_operands = 0; |
| 2223 | /* Nonzero if an instruction with same argument types was found. */ |
| 2224 | int found_same_argument_types = 0; |
| 2225 | /* Nonzero if a constant was found within the required range. */ |
| 2226 | int found_const_within_range = 0; |
| 2227 | /* Argument number of an operand with invalid type. */ |
| 2228 | int invalid_optype = -1; |
| 2229 | /* Argument number of an operand with invalid constant value. */ |
| 2230 | int invalid_const = -1; |
| 2231 | /* Operand error (used for issuing various constant error messages). */ |
| 2232 | op_err op_error, const_err = OP_LEGAL; |
| 2233 | |
| 2234 | /* Retrieve data (based on FUNC) for each operand of a given instruction. */ |
| 2235 | #define GET_CURRENT_DATA(FUNC, ARRAY) \ |
| 2236 | for (i = 0; i < insn->nargs; i++) \ |
| 2237 | ARRAY[i] = FUNC (instruction->operands[i].op_type) |
| 2238 | |
| 2239 | #define GET_CURRENT_TYPE GET_CURRENT_DATA (get_optype, cur_type) |
| 2240 | #define GET_CURRENT_SIZE GET_CURRENT_DATA (get_opbits, cur_size) |
| 2241 | #define GET_CURRENT_FLAGS GET_CURRENT_DATA (get_opflags, cur_flags) |
| 2242 | |
| 2243 | /* Instruction has no operands -> only copy the constant opcode. */ |
| 2244 | if (insn->nargs == 0) |
| 2245 | { |
| 2246 | output_opcode[0] = BIN (instruction->match, instruction->match_bits); |
| 2247 | return 1; |
| 2248 | } |
| 2249 | |
| 2250 | /* In some case, same mnemonic can appear with different instruction types. |
| 2251 | For example, 'storb' is supported with 3 different types : |
| 2252 | LD_STOR_INS, LD_STOR_INS_INC, STOR_IMM_INS. |
| 2253 | We assume that when reaching this point, the instruction type was |
| 2254 | pre-determined. We need to make sure that the type stays the same |
| 2255 | during a search for matching instruction. */ |
| 2256 | ins_type = CR16_INS_TYPE (instruction->flags); |
| 2257 | |
| 2258 | while (/* Check that match is still not found. */ |
| 2259 | match != 1 |
| 2260 | /* Check we didn't get to end of table. */ |
| 2261 | && instruction->mnemonic != NULL |
| 2262 | /* Check that the actual mnemonic is still available. */ |
| 2263 | && IS_INSN_MNEMONIC (mnemonic) |
| 2264 | /* Check that the instruction type wasn't changed. */ |
| 2265 | && IS_INSN_TYPE (ins_type)) |
| 2266 | { |
| 2267 | /* Check whether number of arguments is legal. */ |
| 2268 | if (get_number_of_operands () != insn->nargs) |
| 2269 | goto next_insn; |
| 2270 | found_same_number_of_operands = 1; |
| 2271 | |
| 2272 | /* Initialize arrays with data of each operand in current template. */ |
| 2273 | GET_CURRENT_TYPE; |
| 2274 | GET_CURRENT_SIZE; |
| 2275 | GET_CURRENT_FLAGS; |
| 2276 | |
| 2277 | /* Check for type compatibility. */ |
| 2278 | for (i = 0; i < insn->nargs; i++) |
| 2279 | { |
| 2280 | if (cur_type[i] != insn->arg[i].type) |
| 2281 | { |
| 2282 | if (invalid_optype == -1) |
| 2283 | invalid_optype = i + 1; |
| 2284 | goto next_insn; |
| 2285 | } |
| 2286 | } |
| 2287 | found_same_argument_types = 1; |
| 2288 | |
| 2289 | for (i = 0; i < insn->nargs; i++) |
| 2290 | { |
| 2291 | /* If 'bal' instruction size is '2' and reg operand is not 'ra' |
| 2292 | then goto next instruction. */ |
| 2293 | if (IS_INSN_MNEMONIC ("bal") && (i == 0) |
| 2294 | && (instruction->size == 2) && (insn->arg[i].rp != 14)) |
| 2295 | goto next_insn; |
| 2296 | |
| 2297 | /* If 'storb' instruction with 'sp' reg and 16-bit disp of |
| 2298 | * reg-pair, leads to undefined trap, so this should use |
| 2299 | * 20-bit disp of reg-pair. */ |
| 2300 | if (IS_INSN_MNEMONIC ("storb") && (instruction->size == 2) |
| 2301 | && (insn->arg[i].r == 15) && (insn->arg[i + 1].type == arg_crp)) |
| 2302 | goto next_insn; |
| 2303 | |
| 2304 | /* Only check range - don't update the constant's value, since the |
| 2305 | current instruction may not be the last we try to match. |
| 2306 | The constant's value will be updated later, right before printing |
| 2307 | it to the object file. */ |
| 2308 | if ((insn->arg[i].X_op == O_constant) |
| 2309 | && (op_error = check_range (&insn->arg[i].constant, cur_size[i], |
| 2310 | cur_flags[i], 0))) |
| 2311 | { |
| 2312 | if (invalid_const == -1) |
| 2313 | { |
| 2314 | invalid_const = i + 1; |
| 2315 | const_err = op_error; |
| 2316 | } |
| 2317 | goto next_insn; |
| 2318 | } |
| 2319 | /* For symbols, we make sure the relocation size (which was already |
| 2320 | determined) is sufficient. */ |
| 2321 | else if ((insn->arg[i].X_op == O_symbol) |
| 2322 | && ((bfd_reloc_type_lookup (stdoutput, insn->rtype))->bitsize |
| 2323 | > cur_size[i])) |
| 2324 | goto next_insn; |
| 2325 | } |
| 2326 | found_const_within_range = 1; |
| 2327 | |
| 2328 | /* If we got till here -> Full match is found. */ |
| 2329 | match = 1; |
| 2330 | break; |
| 2331 | |
| 2332 | /* Try again with next instruction. */ |
| 2333 | next_insn: |
| 2334 | instruction++; |
| 2335 | } |
| 2336 | |
| 2337 | if (!match) |
| 2338 | { |
| 2339 | /* We haven't found a match - instruction can't be assembled. */ |
| 2340 | if (!found_same_number_of_operands) |
| 2341 | as_bad (_("Incorrect number of operands")); |
| 2342 | else if (!found_same_argument_types) |
| 2343 | as_bad (_("Illegal type of operand (arg %d)"), invalid_optype); |
| 2344 | else if (!found_const_within_range) |
| 2345 | { |
| 2346 | switch (const_err) |
| 2347 | { |
| 2348 | case OP_OUT_OF_RANGE: |
| 2349 | as_bad (_("Operand out of range (arg %d)"), invalid_const); |
| 2350 | break; |
| 2351 | case OP_NOT_EVEN: |
| 2352 | as_bad (_("Operand has odd displacement (arg %d)"), invalid_const); |
| 2353 | break; |
| 2354 | default: |
| 2355 | as_bad (_("Illegal operand (arg %d)"), invalid_const); |
| 2356 | break; |
| 2357 | } |
| 2358 | } |
| 2359 | |
| 2360 | return 0; |
| 2361 | } |
| 2362 | else |
| 2363 | /* Full match - print the encoding to output file. */ |
| 2364 | { |
| 2365 | /* Make further checking (such that couldn't be made earlier). |
| 2366 | Warn the user if necessary. */ |
| 2367 | warn_if_needed (insn); |
| 2368 | |
| 2369 | /* Check whether we need to adjust the instruction pointer. */ |
| 2370 | if (adjust_if_needed (insn)) |
| 2371 | /* If instruction pointer was adjusted, we need to update |
| 2372 | the size of the current template operands. */ |
| 2373 | GET_CURRENT_SIZE; |
| 2374 | |
| 2375 | for (i = 0; i < insn->nargs; i++) |
| 2376 | { |
| 2377 | int j = instruction->flags & REVERSE_MATCH ? |
| 2378 | i == 0 ? 1 : |
| 2379 | i == 1 ? 0 : i : |
| 2380 | i; |
| 2381 | |
| 2382 | /* This time, update constant value before printing it. */ |
| 2383 | if ((insn->arg[j].X_op == O_constant) |
| 2384 | && (check_range (&insn->arg[j].constant, cur_size[j], |
| 2385 | cur_flags[j], 1) != OP_LEGAL)) |
| 2386 | as_fatal (_("Illegal operand (arg %d)"), j+1); |
| 2387 | } |
| 2388 | |
| 2389 | /* First, copy the instruction's opcode. */ |
| 2390 | output_opcode[0] = BIN (instruction->match, instruction->match_bits); |
| 2391 | |
| 2392 | for (i = 0; i < insn->nargs; i++) |
| 2393 | { |
| 2394 | /* For BAL (ra),disp17 instruction only. And also set the |
| 2395 | DISP24a relocation type. */ |
| 2396 | if (IS_INSN_MNEMONIC ("bal") && (instruction->size == 2) && i == 0) |
| 2397 | { |
| 2398 | insn->rtype = BFD_RELOC_CR16_DISP24a; |
| 2399 | continue; |
| 2400 | } |
| 2401 | cur_arg_num = i; |
| 2402 | print_operand (cur_size[i], instruction->operands[i].shift, |
| 2403 | &insn->arg[i]); |
| 2404 | } |
| 2405 | } |
| 2406 | |
| 2407 | return 1; |
| 2408 | } |
| 2409 | |
| 2410 | /* Print the instruction. |
| 2411 | Handle also cases where the instruction is relaxable/relocatable. */ |
| 2412 | |
| 2413 | static void |
| 2414 | print_insn (ins *insn) |
| 2415 | { |
| 2416 | unsigned int i, j, insn_size; |
| 2417 | char *this_frag; |
| 2418 | unsigned short words[4]; |
| 2419 | int addr_mod; |
| 2420 | |
| 2421 | /* Arrange the insn encodings in a WORD size array. */ |
| 2422 | for (i = 0, j = 0; i < 2; i++) |
| 2423 | { |
| 2424 | words[j++] = (output_opcode[i] >> 16) & 0xFFFF; |
| 2425 | words[j++] = output_opcode[i] & 0xFFFF; |
| 2426 | } |
| 2427 | |
| 2428 | /* Handle relocation. */ |
| 2429 | if ((instruction->flags & RELAXABLE) && relocatable) |
| 2430 | { |
| 2431 | int relax_subtype; |
| 2432 | /* Write the maximal instruction size supported. */ |
| 2433 | insn_size = INSN_MAX_SIZE; |
| 2434 | |
| 2435 | if (IS_INSN_TYPE (BRANCH_INS)) |
| 2436 | { |
| 2437 | switch (insn->rtype) |
| 2438 | { |
| 2439 | case BFD_RELOC_CR16_DISP24: |
| 2440 | relax_subtype = 2; |
| 2441 | break; |
| 2442 | case BFD_RELOC_CR16_DISP16: |
| 2443 | relax_subtype = 1; |
| 2444 | break; |
| 2445 | default: |
| 2446 | relax_subtype = 0; |
| 2447 | break; |
| 2448 | } |
| 2449 | } |
| 2450 | else |
| 2451 | abort (); |
| 2452 | |
| 2453 | this_frag = frag_var (rs_machine_dependent, insn_size *2, |
| 2454 | 4, relax_subtype, |
| 2455 | insn->exp.X_add_symbol, |
| 2456 | 0, |
| 2457 | 0); |
| 2458 | } |
| 2459 | else |
| 2460 | { |
| 2461 | insn_size = instruction->size; |
| 2462 | this_frag = frag_more (insn_size * 2); |
| 2463 | |
| 2464 | if ((relocatable) && (insn->rtype != BFD_RELOC_NONE)) |
| 2465 | { |
| 2466 | reloc_howto_type *reloc_howto; |
| 2467 | int size; |
| 2468 | |
| 2469 | reloc_howto = bfd_reloc_type_lookup (stdoutput, insn->rtype); |
| 2470 | |
| 2471 | if (!reloc_howto) |
| 2472 | abort (); |
| 2473 | |
| 2474 | size = bfd_get_reloc_size (reloc_howto); |
| 2475 | |
| 2476 | if (size < 1 || size > 4) |
| 2477 | abort (); |
| 2478 | |
| 2479 | fix_new_exp (frag_now, this_frag - frag_now->fr_literal, |
| 2480 | size, &insn->exp, reloc_howto->pc_relative, |
| 2481 | insn->rtype); |
| 2482 | } |
| 2483 | } |
| 2484 | |
| 2485 | /* Verify a 2-byte code alignment. */ |
| 2486 | addr_mod = frag_now_fix () & 1; |
| 2487 | if (frag_now->has_code && frag_now->insn_addr != addr_mod) |
| 2488 | as_bad (_("instruction address is not a multiple of 2")); |
| 2489 | frag_now->insn_addr = addr_mod; |
| 2490 | frag_now->has_code = 1; |
| 2491 | |
| 2492 | /* Write the instruction encoding to frag. */ |
| 2493 | for (i = 0; i < insn_size; i++) |
| 2494 | { |
| 2495 | md_number_to_chars (this_frag, (valueT) words[i], 2); |
| 2496 | this_frag += 2; |
| 2497 | } |
| 2498 | } |
| 2499 | |
| 2500 | /* Actually assemble an instruction. */ |
| 2501 | |
| 2502 | static void |
| 2503 | cr16_assemble (const char *op, char *param) |
| 2504 | { |
| 2505 | ins cr16_ins; |
| 2506 | |
| 2507 | /* Find the instruction. */ |
| 2508 | instruction = (const inst *) hash_find (cr16_inst_hash, op); |
| 2509 | if (instruction == NULL) |
| 2510 | { |
| 2511 | as_bad (_("Unknown opcode: `%s'"), op); |
| 2512 | return; |
| 2513 | } |
| 2514 | |
| 2515 | /* Tie dwarf2 debug info to the address at the start of the insn. */ |
| 2516 | dwarf2_emit_insn (0); |
| 2517 | |
| 2518 | /* Parse the instruction's operands. */ |
| 2519 | parse_insn (&cr16_ins, param); |
| 2520 | |
| 2521 | /* Assemble the instruction - return upon failure. */ |
| 2522 | if (assemble_insn (op, &cr16_ins) == 0) |
| 2523 | return; |
| 2524 | |
| 2525 | /* Print the instruction. */ |
| 2526 | print_insn (&cr16_ins); |
| 2527 | } |
| 2528 | |
| 2529 | /* This is the guts of the machine-dependent assembler. OP points to a |
| 2530 | machine dependent instruction. This function is supposed to emit |
| 2531 | the frags/bytes it assembles to. */ |
| 2532 | |
| 2533 | void |
| 2534 | md_assemble (char *op) |
| 2535 | { |
| 2536 | ins cr16_ins; |
| 2537 | char *param, param1[32]; |
| 2538 | |
| 2539 | /* Reset global variables for a new instruction. */ |
| 2540 | reset_vars (op); |
| 2541 | |
| 2542 | /* Strip the mnemonic. */ |
| 2543 | for (param = op; *param != 0 && !ISSPACE (*param); param++) |
| 2544 | ; |
| 2545 | *param++ = '\0'; |
| 2546 | |
| 2547 | /* bCC instructions and adjust the mnemonic by adding extra white spaces. */ |
| 2548 | if (is_bcc_insn (op)) |
| 2549 | { |
| 2550 | strcpy (param1, get_b_cc (op)); |
| 2551 | strcat (param1,","); |
| 2552 | strcat (param1, param); |
| 2553 | param = (char *) ¶m1; |
| 2554 | cr16_assemble ("b", param); |
| 2555 | return; |
| 2556 | } |
| 2557 | |
| 2558 | /* Checking the cinv options and adjust the mnemonic by removing the |
| 2559 | extra white spaces. */ |
| 2560 | if (streq ("cinv", op)) |
| 2561 | { |
| 2562 | /* Validate the cinv options. */ |
| 2563 | check_cinv_options (param); |
| 2564 | strcat (op, param); |
| 2565 | } |
| 2566 | |
| 2567 | /* MAPPING - SHIFT INSN, if imm4/imm16 positive values |
| 2568 | lsh[b/w] imm4/imm6, reg ==> ashu[b/w] imm4/imm16, reg |
| 2569 | as CR16 core doesn't support lsh[b/w] right shift operations. */ |
| 2570 | if ((streq ("lshb", op) || streq ("lshw", op) || streq ("lshd", op)) |
| 2571 | && (param [0] == '$')) |
| 2572 | { |
| 2573 | strcpy (param1, param); |
| 2574 | /* Find the instruction. */ |
| 2575 | instruction = (const inst *) hash_find (cr16_inst_hash, op); |
| 2576 | parse_operands (&cr16_ins, param1); |
| 2577 | if (((&cr16_ins)->arg[0].type == arg_ic) |
| 2578 | && ((&cr16_ins)->arg[0].constant >= 0)) |
| 2579 | { |
| 2580 | if (streq ("lshb", op)) |
| 2581 | cr16_assemble ("ashub", param); |
| 2582 | else if (streq ("lshd", op)) |
| 2583 | cr16_assemble ("ashud", param); |
| 2584 | else |
| 2585 | cr16_assemble ("ashuw", param); |
| 2586 | return; |
| 2587 | } |
| 2588 | } |
| 2589 | |
| 2590 | cr16_assemble (op, param); |
| 2591 | } |