1 /* Assembler interface for targets using CGEN. -*- C -*- 2 CGEN: Cpu tools GENerator 3 4 THIS FILE IS MACHINE GENERATED WITH CGEN. 5 - the resultant file is machine generated, cgen-asm.in isn't 6 7 Copyright (C) 1996-2014 Free Software Foundation, Inc. 8 9 This file is part of libopcodes. 10 11 This library is free software; you can redistribute it and/or modify 12 it under the terms of the GNU General Public License as published by 13 the Free Software Foundation; either version 3, or (at your option) 14 any later version. 15 16 It is distributed in the hope that it will be useful, but WITHOUT 17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 18 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 19 License for more details. 20 21 You should have received a copy of the GNU General Public License 22 along with this program; if not, write to the Free Software Foundation, Inc., 23 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 24 25 26 /* ??? Eventually more and more of this stuff can go to cpu-independent files. 27 Keep that in mind. */ 28 29 #include "sysdep.h" 30 #include <stdio.h> 31 #include "ansidecl.h" 32 #include "bfd.h" 33 #include "symcat.h" 34 #include "m32r-desc.h" 35 #include "m32r-opc.h" 36 #include "opintl.h" 37 #include "xregex.h" 38 #include "libiberty.h" 39 #include "safe-ctype.h" 40 41 #undef min 42 #define min(a,b) ((a) < (b) ? (a) : (b)) 43 #undef max 44 #define max(a,b) ((a) > (b) ? (a) : (b)) 45 46 static const char * parse_insn_normal 47 (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *); 48 49 /* -- assembler routines inserted here. */ 51 52 /* -- asm.c */ 53 static const char * MISSING_CLOSING_PARENTHESIS = N_("missing `)'"); 54 55 /* Handle '#' prefixes (i.e. skip over them). */ 56 57 static const char * 58 parse_hash (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 59 const char **strp, 60 int opindex ATTRIBUTE_UNUSED, 61 long *valuep ATTRIBUTE_UNUSED) 62 { 63 if (**strp == '#') 64 ++*strp; 65 return NULL; 66 } 67 68 /* Handle shigh(), high(). */ 69 70 static const char * 71 parse_hi16 (CGEN_CPU_DESC cd, 72 const char **strp, 73 int opindex, 74 unsigned long *valuep) 75 { 76 const char *errmsg; 77 enum cgen_parse_operand_result result_type; 78 bfd_vma value; 79 80 if (**strp == '#') 81 ++*strp; 82 83 if (strncasecmp (*strp, "high(", 5) == 0) 84 { 85 *strp += 5; 86 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_HI16_ULO, 87 & result_type, & value); 88 if (**strp != ')') 89 return MISSING_CLOSING_PARENTHESIS; 90 ++*strp; 91 if (errmsg == NULL 92 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) 93 { 94 value >>= 16; 95 value &= 0xffff; 96 } 97 *valuep = value; 98 return errmsg; 99 } 100 else if (strncasecmp (*strp, "shigh(", 6) == 0) 101 { 102 *strp += 6; 103 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_HI16_SLO, 104 & result_type, & value); 105 if (**strp != ')') 106 return MISSING_CLOSING_PARENTHESIS; 107 ++*strp; 108 if (errmsg == NULL 109 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) 110 { 111 value += 0x8000; 112 value >>= 16; 113 value &= 0xffff; 114 } 115 *valuep = value; 116 return errmsg; 117 } 118 119 return cgen_parse_unsigned_integer (cd, strp, opindex, valuep); 120 } 121 122 /* Handle low() in a signed context. Also handle sda(). 123 The signedness of the value doesn't matter to low(), but this also 124 handles the case where low() isn't present. */ 125 126 static const char * 127 parse_slo16 (CGEN_CPU_DESC cd, 128 const char ** strp, 129 int opindex, 130 long * valuep) 131 { 132 const char *errmsg; 133 enum cgen_parse_operand_result result_type; 134 bfd_vma value; 135 136 if (**strp == '#') 137 ++*strp; 138 139 if (strncasecmp (*strp, "low(", 4) == 0) 140 { 141 *strp += 4; 142 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_LO16, 143 & result_type, & value); 144 if (**strp != ')') 145 return MISSING_CLOSING_PARENTHESIS; 146 ++*strp; 147 if (errmsg == NULL 148 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) 149 value = ((value & 0xffff) ^ 0x8000) - 0x8000; 150 *valuep = value; 151 return errmsg; 152 } 153 154 if (strncasecmp (*strp, "sda(", 4) == 0) 155 { 156 *strp += 4; 157 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_SDA16, 158 NULL, & value); 159 if (**strp != ')') 160 return MISSING_CLOSING_PARENTHESIS; 161 ++*strp; 162 *valuep = value; 163 return errmsg; 164 } 165 166 return cgen_parse_signed_integer (cd, strp, opindex, valuep); 167 } 168 169 /* Handle low() in an unsigned context. 170 The signedness of the value doesn't matter to low(), but this also 171 handles the case where low() isn't present. */ 172 173 static const char * 174 parse_ulo16 (CGEN_CPU_DESC cd, 175 const char **strp, 176 int opindex, 177 unsigned long *valuep) 178 { 179 const char *errmsg; 180 enum cgen_parse_operand_result result_type; 181 bfd_vma value; 182 183 if (**strp == '#') 184 ++*strp; 185 186 if (strncasecmp (*strp, "low(", 4) == 0) 187 { 188 *strp += 4; 189 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_LO16, 190 & result_type, & value); 191 if (**strp != ')') 192 return MISSING_CLOSING_PARENTHESIS; 193 ++*strp; 194 if (errmsg == NULL 195 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) 196 value &= 0xffff; 197 *valuep = value; 198 return errmsg; 199 } 200 201 return cgen_parse_unsigned_integer (cd, strp, opindex, valuep); 202 } 203 204 /* -- */ 205 206 const char * m32r_cgen_parse_operand 207 (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *); 208 209 /* Main entry point for operand parsing. 210 211 This function is basically just a big switch statement. Earlier versions 212 used tables to look up the function to use, but 213 - if the table contains both assembler and disassembler functions then 214 the disassembler contains much of the assembler and vice-versa, 215 - there's a lot of inlining possibilities as things grow, 216 - using a switch statement avoids the function call overhead. 217 218 This function could be moved into `parse_insn_normal', but keeping it 219 separate makes clear the interface between `parse_insn_normal' and each of 220 the handlers. */ 221 222 const char * 223 m32r_cgen_parse_operand (CGEN_CPU_DESC cd, 224 int opindex, 225 const char ** strp, 226 CGEN_FIELDS * fields) 227 { 228 const char * errmsg = NULL; 229 /* Used by scalar operands that still need to be parsed. */ 230 long junk ATTRIBUTE_UNUSED; 231 232 switch (opindex) 233 { 234 case M32R_OPERAND_ACC : 235 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_h_accums, & fields->f_acc); 236 break; 237 case M32R_OPERAND_ACCD : 238 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_h_accums, & fields->f_accd); 239 break; 240 case M32R_OPERAND_ACCS : 241 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_h_accums, & fields->f_accs); 242 break; 243 case M32R_OPERAND_DCR : 244 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_cr_names, & fields->f_r1); 245 break; 246 case M32R_OPERAND_DISP16 : 247 { 248 bfd_vma value = 0; 249 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_DISP16, 0, NULL, & value); 250 fields->f_disp16 = value; 251 } 252 break; 253 case M32R_OPERAND_DISP24 : 254 { 255 bfd_vma value = 0; 256 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_DISP24, 0, NULL, & value); 257 fields->f_disp24 = value; 258 } 259 break; 260 case M32R_OPERAND_DISP8 : 261 { 262 bfd_vma value = 0; 263 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_DISP8, 0, NULL, & value); 264 fields->f_disp8 = value; 265 } 266 break; 267 case M32R_OPERAND_DR : 268 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r1); 269 break; 270 case M32R_OPERAND_HASH : 271 errmsg = parse_hash (cd, strp, M32R_OPERAND_HASH, (long *) (& junk)); 272 break; 273 case M32R_OPERAND_HI16 : 274 errmsg = parse_hi16 (cd, strp, M32R_OPERAND_HI16, (unsigned long *) (& fields->f_hi16)); 275 break; 276 case M32R_OPERAND_IMM1 : 277 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_IMM1, (unsigned long *) (& fields->f_imm1)); 278 break; 279 case M32R_OPERAND_SCR : 280 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_cr_names, & fields->f_r2); 281 break; 282 case M32R_OPERAND_SIMM16 : 283 errmsg = cgen_parse_signed_integer (cd, strp, M32R_OPERAND_SIMM16, (long *) (& fields->f_simm16)); 284 break; 285 case M32R_OPERAND_SIMM8 : 286 errmsg = cgen_parse_signed_integer (cd, strp, M32R_OPERAND_SIMM8, (long *) (& fields->f_simm8)); 287 break; 288 case M32R_OPERAND_SLO16 : 289 errmsg = parse_slo16 (cd, strp, M32R_OPERAND_SLO16, (long *) (& fields->f_simm16)); 290 break; 291 case M32R_OPERAND_SR : 292 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r2); 293 break; 294 case M32R_OPERAND_SRC1 : 295 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r1); 296 break; 297 case M32R_OPERAND_SRC2 : 298 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r2); 299 break; 300 case M32R_OPERAND_UIMM16 : 301 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM16, (unsigned long *) (& fields->f_uimm16)); 302 break; 303 case M32R_OPERAND_UIMM24 : 304 { 305 bfd_vma value = 0; 306 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_UIMM24, 0, NULL, & value); 307 fields->f_uimm24 = value; 308 } 309 break; 310 case M32R_OPERAND_UIMM3 : 311 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM3, (unsigned long *) (& fields->f_uimm3)); 312 break; 313 case M32R_OPERAND_UIMM4 : 314 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM4, (unsigned long *) (& fields->f_uimm4)); 315 break; 316 case M32R_OPERAND_UIMM5 : 317 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM5, (unsigned long *) (& fields->f_uimm5)); 318 break; 319 case M32R_OPERAND_UIMM8 : 320 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM8, (unsigned long *) (& fields->f_uimm8)); 321 break; 322 case M32R_OPERAND_ULO16 : 323 errmsg = parse_ulo16 (cd, strp, M32R_OPERAND_ULO16, (unsigned long *) (& fields->f_uimm16)); 324 break; 325 326 default : 327 /* xgettext:c-format */ 328 fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex); 329 abort (); 330 } 331 332 return errmsg; 333 } 334 335 cgen_parse_fn * const m32r_cgen_parse_handlers[] = 336 { 337 parse_insn_normal, 338 }; 339 340 void 341 m32r_cgen_init_asm (CGEN_CPU_DESC cd) 342 { 343 m32r_cgen_init_opcode_table (cd); 344 m32r_cgen_init_ibld_table (cd); 345 cd->parse_handlers = & m32r_cgen_parse_handlers[0]; 346 cd->parse_operand = m32r_cgen_parse_operand; 347 #ifdef CGEN_ASM_INIT_HOOK 348 CGEN_ASM_INIT_HOOK 349 #endif 350 } 351 352 353 355 /* Regex construction routine. 356 357 This translates an opcode syntax string into a regex string, 358 by replacing any non-character syntax element (such as an 359 opcode) with the pattern '.*' 360 361 It then compiles the regex and stores it in the opcode, for 362 later use by m32r_cgen_assemble_insn 363 364 Returns NULL for success, an error message for failure. */ 365 366 char * 367 m32r_cgen_build_insn_regex (CGEN_INSN *insn) 368 { 369 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn); 370 const char *mnem = CGEN_INSN_MNEMONIC (insn); 371 char rxbuf[CGEN_MAX_RX_ELEMENTS]; 372 char *rx = rxbuf; 373 const CGEN_SYNTAX_CHAR_TYPE *syn; 374 int reg_err; 375 376 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc)); 377 378 /* Mnemonics come first in the syntax string. */ 379 if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) 380 return _("missing mnemonic in syntax string"); 381 ++syn; 382 383 /* Generate a case sensitive regular expression that emulates case 384 insensitive matching in the "C" locale. We cannot generate a case 385 insensitive regular expression because in Turkish locales, 'i' and 'I' 386 are not equal modulo case conversion. */ 387 388 /* Copy the literal mnemonic out of the insn. */ 389 for (; *mnem; mnem++) 390 { 391 char c = *mnem; 392 393 if (ISALPHA (c)) 394 { 395 *rx++ = '['; 396 *rx++ = TOLOWER (c); 397 *rx++ = TOUPPER (c); 398 *rx++ = ']'; 399 } 400 else 401 *rx++ = c; 402 } 403 404 /* Copy any remaining literals from the syntax string into the rx. */ 405 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn) 406 { 407 if (CGEN_SYNTAX_CHAR_P (* syn)) 408 { 409 char c = CGEN_SYNTAX_CHAR (* syn); 410 411 switch (c) 412 { 413 /* Escape any regex metacharacters in the syntax. */ 414 case '.': case '[': case '\\': 415 case '*': case '^': case '$': 416 417 #ifdef CGEN_ESCAPE_EXTENDED_REGEX 418 case '?': case '{': case '}': 419 case '(': case ')': case '*': 420 case '|': case '+': case ']': 421 #endif 422 *rx++ = '\\'; 423 *rx++ = c; 424 break; 425 426 default: 427 if (ISALPHA (c)) 428 { 429 *rx++ = '['; 430 *rx++ = TOLOWER (c); 431 *rx++ = TOUPPER (c); 432 *rx++ = ']'; 433 } 434 else 435 *rx++ = c; 436 break; 437 } 438 } 439 else 440 { 441 /* Replace non-syntax fields with globs. */ 442 *rx++ = '.'; 443 *rx++ = '*'; 444 } 445 } 446 447 /* Trailing whitespace ok. */ 448 * rx++ = '['; 449 * rx++ = ' '; 450 * rx++ = '\t'; 451 * rx++ = ']'; 452 * rx++ = '*'; 453 454 /* But anchor it after that. */ 455 * rx++ = '$'; 456 * rx = '\0'; 457 458 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t)); 459 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB); 460 461 if (reg_err == 0) 462 return NULL; 463 else 464 { 465 static char msg[80]; 466 467 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80); 468 regfree ((regex_t *) CGEN_INSN_RX (insn)); 469 free (CGEN_INSN_RX (insn)); 470 (CGEN_INSN_RX (insn)) = NULL; 471 return msg; 472 } 473 } 474 475 476 /* Default insn parser. 478 479 The syntax string is scanned and operands are parsed and stored in FIELDS. 480 Relocs are queued as we go via other callbacks. 481 482 ??? Note that this is currently an all-or-nothing parser. If we fail to 483 parse the instruction, we return 0 and the caller will start over from 484 the beginning. Backtracking will be necessary in parsing subexpressions, 485 but that can be handled there. Not handling backtracking here may get 486 expensive in the case of the m68k. Deal with later. 487 488 Returns NULL for success, an error message for failure. */ 489 490 static const char * 491 parse_insn_normal (CGEN_CPU_DESC cd, 492 const CGEN_INSN *insn, 493 const char **strp, 494 CGEN_FIELDS *fields) 495 { 496 /* ??? Runtime added insns not handled yet. */ 497 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); 498 const char *str = *strp; 499 const char *errmsg; 500 const char *p; 501 const CGEN_SYNTAX_CHAR_TYPE * syn; 502 #ifdef CGEN_MNEMONIC_OPERANDS 503 /* FIXME: wip */ 504 int past_opcode_p; 505 #endif 506 507 /* For now we assume the mnemonic is first (there are no leading operands). 508 We can parse it without needing to set up operand parsing. 509 GAS's input scrubber will ensure mnemonics are lowercase, but we may 510 not be called from GAS. */ 511 p = CGEN_INSN_MNEMONIC (insn); 512 while (*p && TOLOWER (*p) == TOLOWER (*str)) 513 ++p, ++str; 514 515 if (* p) 516 return _("unrecognized instruction"); 517 518 #ifndef CGEN_MNEMONIC_OPERANDS 519 if (* str && ! ISSPACE (* str)) 520 return _("unrecognized instruction"); 521 #endif 522 523 CGEN_INIT_PARSE (cd); 524 cgen_init_parse_operand (cd); 525 #ifdef CGEN_MNEMONIC_OPERANDS 526 past_opcode_p = 0; 527 #endif 528 529 /* We don't check for (*str != '\0') here because we want to parse 530 any trailing fake arguments in the syntax string. */ 531 syn = CGEN_SYNTAX_STRING (syntax); 532 533 /* Mnemonics come first for now, ensure valid string. */ 534 if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) 535 abort (); 536 537 ++syn; 538 539 while (* syn != 0) 540 { 541 /* Non operand chars must match exactly. */ 542 if (CGEN_SYNTAX_CHAR_P (* syn)) 543 { 544 /* FIXME: While we allow for non-GAS callers above, we assume the 545 first char after the mnemonic part is a space. */ 546 /* FIXME: We also take inappropriate advantage of the fact that 547 GAS's input scrubber will remove extraneous blanks. */ 548 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn))) 549 { 550 #ifdef CGEN_MNEMONIC_OPERANDS 551 if (CGEN_SYNTAX_CHAR(* syn) == ' ') 552 past_opcode_p = 1; 553 #endif 554 ++ syn; 555 ++ str; 556 } 557 else if (*str) 558 { 559 /* Syntax char didn't match. Can't be this insn. */ 560 static char msg [80]; 561 562 /* xgettext:c-format */ 563 sprintf (msg, _("syntax error (expected char `%c', found `%c')"), 564 CGEN_SYNTAX_CHAR(*syn), *str); 565 return msg; 566 } 567 else 568 { 569 /* Ran out of input. */ 570 static char msg [80]; 571 572 /* xgettext:c-format */ 573 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"), 574 CGEN_SYNTAX_CHAR(*syn)); 575 return msg; 576 } 577 continue; 578 } 579 580 #ifdef CGEN_MNEMONIC_OPERANDS 581 (void) past_opcode_p; 582 #endif 583 /* We have an operand of some sort. */ 584 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields); 585 if (errmsg) 586 return errmsg; 587 588 /* Done with this operand, continue with next one. */ 589 ++ syn; 590 } 591 592 /* If we're at the end of the syntax string, we're done. */ 593 if (* syn == 0) 594 { 595 /* FIXME: For the moment we assume a valid `str' can only contain 596 blanks now. IE: We needn't try again with a longer version of 597 the insn and it is assumed that longer versions of insns appear 598 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ 599 while (ISSPACE (* str)) 600 ++ str; 601 602 if (* str != '\0') 603 return _("junk at end of line"); /* FIXME: would like to include `str' */ 604 605 return NULL; 606 } 607 608 /* We couldn't parse it. */ 609 return _("unrecognized instruction"); 610 } 611 612 /* Main entry point. 614 This routine is called for each instruction to be assembled. 615 STR points to the insn to be assembled. 616 We assume all necessary tables have been initialized. 617 The assembled instruction, less any fixups, is stored in BUF. 618 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value 619 still needs to be converted to target byte order, otherwise BUF is an array 620 of bytes in target byte order. 621 The result is a pointer to the insn's entry in the opcode table, 622 or NULL if an error occured (an error message will have already been 623 printed). 624 625 Note that when processing (non-alias) macro-insns, 626 this function recurses. 627 628 ??? It's possible to make this cpu-independent. 629 One would have to deal with a few minor things. 630 At this point in time doing so would be more of a curiosity than useful 631 [for example this file isn't _that_ big], but keeping the possibility in 632 mind helps keep the design clean. */ 633 634 const CGEN_INSN * 635 m32r_cgen_assemble_insn (CGEN_CPU_DESC cd, 636 const char *str, 637 CGEN_FIELDS *fields, 638 CGEN_INSN_BYTES_PTR buf, 639 char **errmsg) 640 { 641 const char *start; 642 CGEN_INSN_LIST *ilist; 643 const char *parse_errmsg = NULL; 644 const char *insert_errmsg = NULL; 645 int recognized_mnemonic = 0; 646 647 /* Skip leading white space. */ 648 while (ISSPACE (* str)) 649 ++ str; 650 651 /* The instructions are stored in hashed lists. 652 Get the first in the list. */ 653 ilist = CGEN_ASM_LOOKUP_INSN (cd, str); 654 655 /* Keep looking until we find a match. */ 656 start = str; 657 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist)) 658 { 659 const CGEN_INSN *insn = ilist->insn; 660 recognized_mnemonic = 1; 661 662 #ifdef CGEN_VALIDATE_INSN_SUPPORTED 663 /* Not usually needed as unsupported opcodes 664 shouldn't be in the hash lists. */ 665 /* Is this insn supported by the selected cpu? */ 666 if (! m32r_cgen_insn_supported (cd, insn)) 667 continue; 668 #endif 669 /* If the RELAXED attribute is set, this is an insn that shouldn't be 670 chosen immediately. Instead, it is used during assembler/linker 671 relaxation if possible. */ 672 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0) 673 continue; 674 675 str = start; 676 677 /* Skip this insn if str doesn't look right lexically. */ 678 if (CGEN_INSN_RX (insn) != NULL && 679 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH) 680 continue; 681 682 /* Allow parse/insert handlers to obtain length of insn. */ 683 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); 684 685 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields); 686 if (parse_errmsg != NULL) 687 continue; 688 689 /* ??? 0 is passed for `pc'. */ 690 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf, 691 (bfd_vma) 0); 692 if (insert_errmsg != NULL) 693 continue; 694 695 /* It is up to the caller to actually output the insn and any 696 queued relocs. */ 697 return insn; 698 } 699 700 { 701 static char errbuf[150]; 702 const char *tmp_errmsg; 703 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS 704 #define be_verbose 1 705 #else 706 #define be_verbose 0 707 #endif 708 709 if (be_verbose) 710 { 711 /* If requesting verbose error messages, use insert_errmsg. 712 Failing that, use parse_errmsg. */ 713 tmp_errmsg = (insert_errmsg ? insert_errmsg : 714 parse_errmsg ? parse_errmsg : 715 recognized_mnemonic ? 716 _("unrecognized form of instruction") : 717 _("unrecognized instruction")); 718 719 if (strlen (start) > 50) 720 /* xgettext:c-format */ 721 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start); 722 else 723 /* xgettext:c-format */ 724 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start); 725 } 726 else 727 { 728 if (strlen (start) > 50) 729 /* xgettext:c-format */ 730 sprintf (errbuf, _("bad instruction `%.50s...'"), start); 731 else 732 /* xgettext:c-format */ 733 sprintf (errbuf, _("bad instruction `%.50s'"), start); 734 } 735 736 *errmsg = errbuf; 737 return NULL; 738 } 739 } 740
