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 1996, 1997, 1998, 1999, 2000, 2001, 2005, 2007 8 Free Software Foundation, Inc. 9 10 This file is part of libopcodes. 11 12 This library is free software; you can redistribute it and/or modify 13 it under the terms of the GNU General Public License as published by 14 the Free Software Foundation; either version 3, or (at your option) 15 any later version. 16 17 It is distributed in the hope that it will be useful, but WITHOUT 18 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 19 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 20 License for more details. 21 22 You should have received a copy of the GNU General Public License 23 along with this program; if not, write to the Free Software Foundation, Inc., 24 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 25 26 27 /* ??? Eventually more and more of this stuff can go to cpu-independent files. 28 Keep that in mind. */ 29 30 #include "sysdep.h" 31 #include <stdio.h> 32 #include "ansidecl.h" 33 #include "bfd.h" 34 #include "symcat.h" 35 #include "m32r-desc.h" 36 #include "m32r-opc.h" 37 #include "opintl.h" 38 #include "xregex.h" 39 #include "libiberty.h" 40 #include "safe-ctype.h" 41 42 #undef min 43 #define min(a,b) ((a) < (b) ? (a) : (b)) 44 #undef max 45 #define max(a,b) ((a) > (b) ? (a) : (b)) 46 47 static const char * parse_insn_normal 48 (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *); 49 50 /* -- 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 } 351 352 353 354 /* Regex construction routine. 355 356 This translates an opcode syntax string into a regex string, 357 by replacing any non-character syntax element (such as an 358 opcode) with the pattern '.*' 359 360 It then compiles the regex and stores it in the opcode, for 361 later use by m32r_cgen_assemble_insn 362 363 Returns NULL for success, an error message for failure. */ 364 365 char * 366 m32r_cgen_build_insn_regex (CGEN_INSN *insn) 367 { 368 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn); 369 const char *mnem = CGEN_INSN_MNEMONIC (insn); 370 char rxbuf[CGEN_MAX_RX_ELEMENTS]; 371 char *rx = rxbuf; 372 const CGEN_SYNTAX_CHAR_TYPE *syn; 373 int reg_err; 374 375 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc)); 376 377 /* Mnemonics come first in the syntax string. */ 378 if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) 379 return _("missing mnemonic in syntax string"); 380 ++syn; 381 382 /* Generate a case sensitive regular expression that emulates case 383 insensitive matching in the "C" locale. We cannot generate a case 384 insensitive regular expression because in Turkish locales, 'i' and 'I' 385 are not equal modulo case conversion. */ 386 387 /* Copy the literal mnemonic out of the insn. */ 388 for (; *mnem; mnem++) 389 { 390 char c = *mnem; 391 392 if (ISALPHA (c)) 393 { 394 *rx++ = '['; 395 *rx++ = TOLOWER (c); 396 *rx++ = TOUPPER (c); 397 *rx++ = ']'; 398 } 399 else 400 *rx++ = c; 401 } 402 403 /* Copy any remaining literals from the syntax string into the rx. */ 404 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn) 405 { 406 if (CGEN_SYNTAX_CHAR_P (* syn)) 407 { 408 char c = CGEN_SYNTAX_CHAR (* syn); 409 410 switch (c) 411 { 412 /* Escape any regex metacharacters in the syntax. */ 413 case '.': case '[': case '\\': 414 case '*': case '^': case '$': 415 416 #ifdef CGEN_ESCAPE_EXTENDED_REGEX 417 case '?': case '{': case '}': 418 case '(': case ')': case '*': 419 case '|': case '+': case ']': 420 #endif 421 *rx++ = '\\'; 422 *rx++ = c; 423 break; 424 425 default: 426 if (ISALPHA (c)) 427 { 428 *rx++ = '['; 429 *rx++ = TOLOWER (c); 430 *rx++ = TOUPPER (c); 431 *rx++ = ']'; 432 } 433 else 434 *rx++ = c; 435 break; 436 } 437 } 438 else 439 { 440 /* Replace non-syntax fields with globs. */ 441 *rx++ = '.'; 442 *rx++ = '*'; 443 } 444 } 445 446 /* Trailing whitespace ok. */ 447 * rx++ = '['; 448 * rx++ = ' '; 449 * rx++ = '\t'; 450 * rx++ = ']'; 451 * rx++ = '*'; 452 453 /* But anchor it after that. */ 454 * rx++ = '$'; 455 * rx = '\0'; 456 457 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t)); 458 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB); 459 460 if (reg_err == 0) 461 return NULL; 462 else 463 { 464 static char msg[80]; 465 466 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80); 467 regfree ((regex_t *) CGEN_INSN_RX (insn)); 468 free (CGEN_INSN_RX (insn)); 469 (CGEN_INSN_RX (insn)) = NULL; 470 return msg; 471 } 472 } 473 474 475 /* Default insn parser. 476 477 The syntax string is scanned and operands are parsed and stored in FIELDS. 478 Relocs are queued as we go via other callbacks. 479 480 ??? Note that this is currently an all-or-nothing parser. If we fail to 481 parse the instruction, we return 0 and the caller will start over from 482 the beginning. Backtracking will be necessary in parsing subexpressions, 483 but that can be handled there. Not handling backtracking here may get 484 expensive in the case of the m68k. Deal with later. 485 486 Returns NULL for success, an error message for failure. */ 487 488 static const char * 489 parse_insn_normal (CGEN_CPU_DESC cd, 490 const CGEN_INSN *insn, 491 const char **strp, 492 CGEN_FIELDS *fields) 493 { 494 /* ??? Runtime added insns not handled yet. */ 495 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); 496 const char *str = *strp; 497 const char *errmsg; 498 const char *p; 499 const CGEN_SYNTAX_CHAR_TYPE * syn; 500 #ifdef CGEN_MNEMONIC_OPERANDS 501 /* FIXME: wip */ 502 int past_opcode_p; 503 #endif 504 505 /* For now we assume the mnemonic is first (there are no leading operands). 506 We can parse it without needing to set up operand parsing. 507 GAS's input scrubber will ensure mnemonics are lowercase, but we may 508 not be called from GAS. */ 509 p = CGEN_INSN_MNEMONIC (insn); 510 while (*p && TOLOWER (*p) == TOLOWER (*str)) 511 ++p, ++str; 512 513 if (* p) 514 return _("unrecognized instruction"); 515 516 #ifndef CGEN_MNEMONIC_OPERANDS 517 if (* str && ! ISSPACE (* str)) 518 return _("unrecognized instruction"); 519 #endif 520 521 CGEN_INIT_PARSE (cd); 522 cgen_init_parse_operand (cd); 523 #ifdef CGEN_MNEMONIC_OPERANDS 524 past_opcode_p = 0; 525 #endif 526 527 /* We don't check for (*str != '\0') here because we want to parse 528 any trailing fake arguments in the syntax string. */ 529 syn = CGEN_SYNTAX_STRING (syntax); 530 531 /* Mnemonics come first for now, ensure valid string. */ 532 if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) 533 abort (); 534 535 ++syn; 536 537 while (* syn != 0) 538 { 539 /* Non operand chars must match exactly. */ 540 if (CGEN_SYNTAX_CHAR_P (* syn)) 541 { 542 /* FIXME: While we allow for non-GAS callers above, we assume the 543 first char after the mnemonic part is a space. */ 544 /* FIXME: We also take inappropriate advantage of the fact that 545 GAS's input scrubber will remove extraneous blanks. */ 546 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn))) 547 { 548 #ifdef CGEN_MNEMONIC_OPERANDS 549 if (CGEN_SYNTAX_CHAR(* syn) == ' ') 550 past_opcode_p = 1; 551 #endif 552 ++ syn; 553 ++ str; 554 } 555 else if (*str) 556 { 557 /* Syntax char didn't match. Can't be this insn. */ 558 static char msg [80]; 559 560 /* xgettext:c-format */ 561 sprintf (msg, _("syntax error (expected char `%c', found `%c')"), 562 CGEN_SYNTAX_CHAR(*syn), *str); 563 return msg; 564 } 565 else 566 { 567 /* Ran out of input. */ 568 static char msg [80]; 569 570 /* xgettext:c-format */ 571 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"), 572 CGEN_SYNTAX_CHAR(*syn)); 573 return msg; 574 } 575 continue; 576 } 577 578 /* We have an operand of some sort. */ 579 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), 580 &str, fields); 581 if (errmsg) 582 return errmsg; 583 584 /* Done with this operand, continue with next one. */ 585 ++ syn; 586 } 587 588 /* If we're at the end of the syntax string, we're done. */ 589 if (* syn == 0) 590 { 591 /* FIXME: For the moment we assume a valid `str' can only contain 592 blanks now. IE: We needn't try again with a longer version of 593 the insn and it is assumed that longer versions of insns appear 594 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ 595 while (ISSPACE (* str)) 596 ++ str; 597 598 if (* str != '\0') 599 return _("junk at end of line"); /* FIXME: would like to include `str' */ 600 601 return NULL; 602 } 603 604 /* We couldn't parse it. */ 605 return _("unrecognized instruction"); 606 } 607 608 /* Main entry point. 609 This routine is called for each instruction to be assembled. 610 STR points to the insn to be assembled. 611 We assume all necessary tables have been initialized. 612 The assembled instruction, less any fixups, is stored in BUF. 613 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value 614 still needs to be converted to target byte order, otherwise BUF is an array 615 of bytes in target byte order. 616 The result is a pointer to the insn's entry in the opcode table, 617 or NULL if an error occured (an error message will have already been 618 printed). 619 620 Note that when processing (non-alias) macro-insns, 621 this function recurses. 622 623 ??? It's possible to make this cpu-independent. 624 One would have to deal with a few minor things. 625 At this point in time doing so would be more of a curiosity than useful 626 [for example this file isn't _that_ big], but keeping the possibility in 627 mind helps keep the design clean. */ 628 629 const CGEN_INSN * 630 m32r_cgen_assemble_insn (CGEN_CPU_DESC cd, 631 const char *str, 632 CGEN_FIELDS *fields, 633 CGEN_INSN_BYTES_PTR buf, 634 char **errmsg) 635 { 636 const char *start; 637 CGEN_INSN_LIST *ilist; 638 const char *parse_errmsg = NULL; 639 const char *insert_errmsg = NULL; 640 int recognized_mnemonic = 0; 641 642 /* Skip leading white space. */ 643 while (ISSPACE (* str)) 644 ++ str; 645 646 /* The instructions are stored in hashed lists. 647 Get the first in the list. */ 648 ilist = CGEN_ASM_LOOKUP_INSN (cd, str); 649 650 /* Keep looking until we find a match. */ 651 start = str; 652 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist)) 653 { 654 const CGEN_INSN *insn = ilist->insn; 655 recognized_mnemonic = 1; 656 657 #ifdef CGEN_VALIDATE_INSN_SUPPORTED 658 /* Not usually needed as unsupported opcodes 659 shouldn't be in the hash lists. */ 660 /* Is this insn supported by the selected cpu? */ 661 if (! m32r_cgen_insn_supported (cd, insn)) 662 continue; 663 #endif 664 /* If the RELAXED attribute is set, this is an insn that shouldn't be 665 chosen immediately. Instead, it is used during assembler/linker 666 relaxation if possible. */ 667 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0) 668 continue; 669 670 str = start; 671 672 /* Skip this insn if str doesn't look right lexically. */ 673 if (CGEN_INSN_RX (insn) != NULL && 674 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH) 675 continue; 676 677 /* Allow parse/insert handlers to obtain length of insn. */ 678 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); 679 680 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields); 681 if (parse_errmsg != NULL) 682 continue; 683 684 /* ??? 0 is passed for `pc'. */ 685 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf, 686 (bfd_vma) 0); 687 if (insert_errmsg != NULL) 688 continue; 689 690 /* It is up to the caller to actually output the insn and any 691 queued relocs. */ 692 return insn; 693 } 694 695 { 696 static char errbuf[150]; 697 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS 698 const char *tmp_errmsg; 699 700 /* If requesting verbose error messages, use insert_errmsg. 701 Failing that, use parse_errmsg. */ 702 tmp_errmsg = (insert_errmsg ? insert_errmsg : 703 parse_errmsg ? parse_errmsg : 704 recognized_mnemonic ? 705 _("unrecognized form of instruction") : 706 _("unrecognized instruction")); 707 708 if (strlen (start) > 50) 709 /* xgettext:c-format */ 710 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start); 711 else 712 /* xgettext:c-format */ 713 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start); 714 #else 715 if (strlen (start) > 50) 716 /* xgettext:c-format */ 717 sprintf (errbuf, _("bad instruction `%.50s...'"), start); 718 else 719 /* xgettext:c-format */ 720 sprintf (errbuf, _("bad instruction `%.50s'"), start); 721 #endif 722 723 *errmsg = errbuf; 724 return NULL; 725 } 726 } 727