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 Free Software Foundation, Inc. 8 9 This file is part of the GNU Binutils and GDB, the GNU debugger. 10 11 This program 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 2, or (at your option) 14 any later version. 15 16 This program is distributed in the hope that it will be useful, 17 but WITHOUT ANY WARRANTY; without even the implied warranty of 18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 GNU General Public 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 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 24 25 /* ??? Eventually more and more of this stuff can go to cpu-independent files. 26 Keep that in mind. */ 27 28 #include "sysdep.h" 29 #include <stdio.h> 30 #include "ansidecl.h" 31 #include "bfd.h" 32 #include "symcat.h" 33 #include "fr30-desc.h" 34 #include "fr30-opc.h" 35 #include "opintl.h" 36 #include "xregex.h" 37 #include "libiberty.h" 38 #include "safe-ctype.h" 39 40 #undef min 41 #define min(a,b) ((a) < (b) ? (a) : (b)) 42 #undef max 43 #define max(a,b) ((a) > (b) ? (a) : (b)) 44 45 static const char * parse_insn_normal 46 PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *)); 47 48 /* -- assembler routines inserted here. */ 49 50 /* -- asm.c */ 51 /* Handle register lists for LDMx and STMx. */ 52 53 static int parse_register_number 54 PARAMS ((const char **)); 55 static const char * parse_register_list 56 PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *, int, int)); 57 static const char * parse_low_register_list_ld 58 PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *)); 59 static const char * parse_hi_register_list_ld 60 PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *)); 61 static const char * parse_low_register_list_st 62 PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *)); 63 static const char * parse_hi_register_list_st 64 PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *)); 65 66 static int 67 parse_register_number (strp) 68 const char **strp; 69 { 70 int regno; 71 if (**strp < '0' || **strp > '9') 72 return -1; /* error. */ 73 regno = **strp - '0'; 74 ++*strp; 75 76 if (**strp >= '0' && **strp <= '9') 77 { 78 regno = regno * 10 + (**strp - '0'); 79 ++*strp; 80 } 81 82 return regno; 83 } 84 85 static const char * 86 parse_register_list (cd, strp, opindex, valuep, high_low, load_store) 87 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; 88 const char **strp; 89 int opindex ATTRIBUTE_UNUSED; 90 unsigned long *valuep; 91 int high_low; /* 0 == high, 1 == low */ 92 int load_store; /* 0 == load, 1 == store */ 93 { 94 int regno; 95 96 *valuep = 0; 97 while (**strp && **strp != ')') 98 { 99 if (**strp != 'R' && **strp != 'r') 100 break; 101 ++*strp; 102 103 regno = parse_register_number (strp); 104 if (regno == -1) 105 return "Register number is not valid"; 106 if (regno > 7 && !high_low) 107 return "Register must be between r0 and r7"; 108 if (regno < 8 && high_low) 109 return "Register must be between r8 and r15"; 110 111 if (high_low) 112 regno -= 8; 113 114 if (load_store) /* Mask is reversed for store. */ 115 *valuep |= 0x80 >> regno; 116 else 117 *valuep |= 1 << regno; 118 119 if (**strp == ',') 120 { 121 if (*(*strp + 1) == ')') 122 break; 123 ++*strp; 124 } 125 } 126 127 if (!*strp || **strp != ')') 128 return "Register list is not valid"; 129 130 return NULL; 131 } 132 133 static const char * 134 parse_low_register_list_ld (cd, strp, opindex, valuep) 135 CGEN_CPU_DESC cd; 136 const char **strp; 137 int opindex; 138 unsigned long *valuep; 139 { 140 return parse_register_list (cd, strp, opindex, valuep, 0/*low*/, 0/*load*/); 141 } 142 143 static const char * 144 parse_hi_register_list_ld (cd, strp, opindex, valuep) 145 CGEN_CPU_DESC cd; 146 const char **strp; 147 int opindex; 148 unsigned long *valuep; 149 { 150 return parse_register_list (cd, strp, opindex, valuep, 1/*high*/, 0/*load*/); 151 } 152 153 static const char * 154 parse_low_register_list_st (cd, strp, opindex, valuep) 155 CGEN_CPU_DESC cd; 156 const char **strp; 157 int opindex; 158 unsigned long *valuep; 159 { 160 return parse_register_list (cd, strp, opindex, valuep, 0/*low*/, 1/*store*/); 161 } 162 163 static const char * 164 parse_hi_register_list_st (cd, strp, opindex, valuep) 165 CGEN_CPU_DESC cd; 166 const char **strp; 167 int opindex; 168 unsigned long *valuep; 169 { 170 return parse_register_list (cd, strp, opindex, valuep, 1/*high*/, 1/*store*/); 171 } 172 173 /* -- */ 174 175 const char * fr30_cgen_parse_operand 176 PARAMS ((CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *)); 177 178 /* Main entry point for operand parsing. 179 180 This function is basically just a big switch statement. Earlier versions 181 used tables to look up the function to use, but 182 - if the table contains both assembler and disassembler functions then 183 the disassembler contains much of the assembler and vice-versa, 184 - there's a lot of inlining possibilities as things grow, 185 - using a switch statement avoids the function call overhead. 186 187 This function could be moved into `parse_insn_normal', but keeping it 188 separate makes clear the interface between `parse_insn_normal' and each of 189 the handlers. */ 190 191 const char * 192 fr30_cgen_parse_operand (cd, opindex, strp, fields) 193 CGEN_CPU_DESC cd; 194 int opindex; 195 const char ** strp; 196 CGEN_FIELDS * fields; 197 { 198 const char * errmsg = NULL; 199 /* Used by scalar operands that still need to be parsed. */ 200 long junk ATTRIBUTE_UNUSED; 201 202 switch (opindex) 203 { 204 case FR30_OPERAND_CRI : 205 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_cr_names, & fields->f_CRi); 206 break; 207 case FR30_OPERAND_CRJ : 208 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_cr_names, & fields->f_CRj); 209 break; 210 case FR30_OPERAND_R13 : 211 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_r13, & junk); 212 break; 213 case FR30_OPERAND_R14 : 214 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_r14, & junk); 215 break; 216 case FR30_OPERAND_R15 : 217 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_r15, & junk); 218 break; 219 case FR30_OPERAND_RI : 220 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Ri); 221 break; 222 case FR30_OPERAND_RIC : 223 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Ric); 224 break; 225 case FR30_OPERAND_RJ : 226 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Rj); 227 break; 228 case FR30_OPERAND_RJC : 229 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Rjc); 230 break; 231 case FR30_OPERAND_RS1 : 232 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_dr_names, & fields->f_Rs1); 233 break; 234 case FR30_OPERAND_RS2 : 235 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_dr_names, & fields->f_Rs2); 236 break; 237 case FR30_OPERAND_CC : 238 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_CC, &fields->f_cc); 239 break; 240 case FR30_OPERAND_CCC : 241 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_CCC, &fields->f_ccc); 242 break; 243 case FR30_OPERAND_DIR10 : 244 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_DIR10, &fields->f_dir10); 245 break; 246 case FR30_OPERAND_DIR8 : 247 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_DIR8, &fields->f_dir8); 248 break; 249 case FR30_OPERAND_DIR9 : 250 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_DIR9, &fields->f_dir9); 251 break; 252 case FR30_OPERAND_DISP10 : 253 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_DISP10, &fields->f_disp10); 254 break; 255 case FR30_OPERAND_DISP8 : 256 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_DISP8, &fields->f_disp8); 257 break; 258 case FR30_OPERAND_DISP9 : 259 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_DISP9, &fields->f_disp9); 260 break; 261 case FR30_OPERAND_I20 : 262 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_I20, &fields->f_i20); 263 break; 264 case FR30_OPERAND_I32 : 265 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_I32, &fields->f_i32); 266 break; 267 case FR30_OPERAND_I8 : 268 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_I8, &fields->f_i8); 269 break; 270 case FR30_OPERAND_LABEL12 : 271 { 272 bfd_vma value; 273 errmsg = cgen_parse_address (cd, strp, FR30_OPERAND_LABEL12, 0, NULL, & value); 274 fields->f_rel12 = value; 275 } 276 break; 277 case FR30_OPERAND_LABEL9 : 278 { 279 bfd_vma value; 280 errmsg = cgen_parse_address (cd, strp, FR30_OPERAND_LABEL9, 0, NULL, & value); 281 fields->f_rel9 = value; 282 } 283 break; 284 case FR30_OPERAND_M4 : 285 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_M4, &fields->f_m4); 286 break; 287 case FR30_OPERAND_PS : 288 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_ps, & junk); 289 break; 290 case FR30_OPERAND_REGLIST_HI_LD : 291 errmsg = parse_hi_register_list_ld (cd, strp, FR30_OPERAND_REGLIST_HI_LD, &fields->f_reglist_hi_ld); 292 break; 293 case FR30_OPERAND_REGLIST_HI_ST : 294 errmsg = parse_hi_register_list_st (cd, strp, FR30_OPERAND_REGLIST_HI_ST, &fields->f_reglist_hi_st); 295 break; 296 case FR30_OPERAND_REGLIST_LOW_LD : 297 errmsg = parse_low_register_list_ld (cd, strp, FR30_OPERAND_REGLIST_LOW_LD, &fields->f_reglist_low_ld); 298 break; 299 case FR30_OPERAND_REGLIST_LOW_ST : 300 errmsg = parse_low_register_list_st (cd, strp, FR30_OPERAND_REGLIST_LOW_ST, &fields->f_reglist_low_st); 301 break; 302 case FR30_OPERAND_S10 : 303 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_S10, &fields->f_s10); 304 break; 305 case FR30_OPERAND_U10 : 306 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U10, &fields->f_u10); 307 break; 308 case FR30_OPERAND_U4 : 309 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U4, &fields->f_u4); 310 break; 311 case FR30_OPERAND_U4C : 312 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U4C, &fields->f_u4c); 313 break; 314 case FR30_OPERAND_U8 : 315 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U8, &fields->f_u8); 316 break; 317 case FR30_OPERAND_UDISP6 : 318 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_UDISP6, &fields->f_udisp6); 319 break; 320 321 default : 322 /* xgettext:c-format */ 323 fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex); 324 abort (); 325 } 326 327 return errmsg; 328 } 329 330 cgen_parse_fn * const fr30_cgen_parse_handlers[] = 331 { 332 parse_insn_normal, 333 }; 334 335 void 336 fr30_cgen_init_asm (cd) 337 CGEN_CPU_DESC cd; 338 { 339 fr30_cgen_init_opcode_table (cd); 340 fr30_cgen_init_ibld_table (cd); 341 cd->parse_handlers = & fr30_cgen_parse_handlers[0]; 342 cd->parse_operand = fr30_cgen_parse_operand; 343 } 344 345 346 347 /* Regex construction routine. 348 349 This translates an opcode syntax string into a regex string, 350 by replacing any non-character syntax element (such as an 351 opcode) with the pattern '.*' 352 353 It then compiles the regex and stores it in the opcode, for 354 later use by fr30_cgen_assemble_insn 355 356 Returns NULL for success, an error message for failure. */ 357 358 char * 359 fr30_cgen_build_insn_regex (insn) 360 CGEN_INSN *insn; 361 { 362 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn); 363 const char *mnem = CGEN_INSN_MNEMONIC (insn); 364 char rxbuf[CGEN_MAX_RX_ELEMENTS]; 365 char *rx = rxbuf; 366 const CGEN_SYNTAX_CHAR_TYPE *syn; 367 int reg_err; 368 369 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc)); 370 371 /* Mnemonics come first in the syntax string. */ 372 if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) 373 return _("missing mnemonic in syntax string"); 374 ++syn; 375 376 /* Generate a case sensitive regular expression that emulates case 377 insensitive matching in the "C" locale. We cannot generate a case 378 insensitive regular expression because in Turkish locales, 'i' and 'I' 379 are not equal modulo case conversion. */ 380 381 /* Copy the literal mnemonic out of the insn. */ 382 for (; *mnem; mnem++) 383 { 384 char c = *mnem; 385 386 if (ISALPHA (c)) 387 { 388 *rx++ = '['; 389 *rx++ = TOLOWER (c); 390 *rx++ = TOUPPER (c); 391 *rx++ = ']'; 392 } 393 else 394 *rx++ = c; 395 } 396 397 /* Copy any remaining literals from the syntax string into the rx. */ 398 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn) 399 { 400 if (CGEN_SYNTAX_CHAR_P (* syn)) 401 { 402 char c = CGEN_SYNTAX_CHAR (* syn); 403 404 switch (c) 405 { 406 /* Escape any regex metacharacters in the syntax. */ 407 case '.': case '[': case '\\': 408 case '*': case '^': case '$': 409 410 #ifdef CGEN_ESCAPE_EXTENDED_REGEX 411 case '?': case '{': case '}': 412 case '(': case ')': case '*': 413 case '|': case '+': case ']': 414 #endif 415 *rx++ = '\\'; 416 *rx++ = c; 417 break; 418 419 default: 420 if (ISALPHA (c)) 421 { 422 *rx++ = '['; 423 *rx++ = TOLOWER (c); 424 *rx++ = TOUPPER (c); 425 *rx++ = ']'; 426 } 427 else 428 *rx++ = c; 429 break; 430 } 431 } 432 else 433 { 434 /* Replace non-syntax fields with globs. */ 435 *rx++ = '.'; 436 *rx++ = '*'; 437 } 438 } 439 440 /* Trailing whitespace ok. */ 441 * rx++ = '['; 442 * rx++ = ' '; 443 * rx++ = '\t'; 444 * rx++ = ']'; 445 * rx++ = '*'; 446 447 /* But anchor it after that. */ 448 * rx++ = '$'; 449 * rx = '\0'; 450 451 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t)); 452 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB); 453 454 if (reg_err == 0) 455 return NULL; 456 else 457 { 458 static char msg[80]; 459 460 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80); 461 regfree ((regex_t *) CGEN_INSN_RX (insn)); 462 free (CGEN_INSN_RX (insn)); 463 (CGEN_INSN_RX (insn)) = NULL; 464 return msg; 465 } 466 } 467 468 469 /* Default insn parser. 470 471 The syntax string is scanned and operands are parsed and stored in FIELDS. 472 Relocs are queued as we go via other callbacks. 473 474 ??? Note that this is currently an all-or-nothing parser. If we fail to 475 parse the instruction, we return 0 and the caller will start over from 476 the beginning. Backtracking will be necessary in parsing subexpressions, 477 but that can be handled there. Not handling backtracking here may get 478 expensive in the case of the m68k. Deal with later. 479 480 Returns NULL for success, an error message for failure. */ 481 482 static const char * 483 parse_insn_normal (cd, insn, strp, fields) 484 CGEN_CPU_DESC cd; 485 const CGEN_INSN *insn; 486 const char **strp; 487 CGEN_FIELDS *fields; 488 { 489 /* ??? Runtime added insns not handled yet. */ 490 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); 491 const char *str = *strp; 492 const char *errmsg; 493 const char *p; 494 const CGEN_SYNTAX_CHAR_TYPE * syn; 495 #ifdef CGEN_MNEMONIC_OPERANDS 496 /* FIXME: wip */ 497 int past_opcode_p; 498 #endif 499 500 /* For now we assume the mnemonic is first (there are no leading operands). 501 We can parse it without needing to set up operand parsing. 502 GAS's input scrubber will ensure mnemonics are lowercase, but we may 503 not be called from GAS. */ 504 p = CGEN_INSN_MNEMONIC (insn); 505 while (*p && TOLOWER (*p) == TOLOWER (*str)) 506 ++p, ++str; 507 508 if (* p) 509 return _("unrecognized instruction"); 510 511 #ifndef CGEN_MNEMONIC_OPERANDS 512 if (* str && ! ISSPACE (* str)) 513 return _("unrecognized instruction"); 514 #endif 515 516 CGEN_INIT_PARSE (cd); 517 cgen_init_parse_operand (cd); 518 #ifdef CGEN_MNEMONIC_OPERANDS 519 past_opcode_p = 0; 520 #endif 521 522 /* We don't check for (*str != '\0') here because we want to parse 523 any trailing fake arguments in the syntax string. */ 524 syn = CGEN_SYNTAX_STRING (syntax); 525 526 /* Mnemonics come first for now, ensure valid string. */ 527 if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) 528 abort (); 529 530 ++syn; 531 532 while (* syn != 0) 533 { 534 /* Non operand chars must match exactly. */ 535 if (CGEN_SYNTAX_CHAR_P (* syn)) 536 { 537 /* FIXME: While we allow for non-GAS callers above, we assume the 538 first char after the mnemonic part is a space. */ 539 /* FIXME: We also take inappropriate advantage of the fact that 540 GAS's input scrubber will remove extraneous blanks. */ 541 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn))) 542 { 543 #ifdef CGEN_MNEMONIC_OPERANDS 544 if (CGEN_SYNTAX_CHAR(* syn) == ' ') 545 past_opcode_p = 1; 546 #endif 547 ++ syn; 548 ++ str; 549 } 550 else if (*str) 551 { 552 /* Syntax char didn't match. Can't be this insn. */ 553 static char msg [80]; 554 555 /* xgettext:c-format */ 556 sprintf (msg, _("syntax error (expected char `%c', found `%c')"), 557 CGEN_SYNTAX_CHAR(*syn), *str); 558 return msg; 559 } 560 else 561 { 562 /* Ran out of input. */ 563 static char msg [80]; 564 565 /* xgettext:c-format */ 566 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"), 567 CGEN_SYNTAX_CHAR(*syn)); 568 return msg; 569 } 570 continue; 571 } 572 573 /* We have an operand of some sort. */ 574 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), 575 &str, fields); 576 if (errmsg) 577 return errmsg; 578 579 /* Done with this operand, continue with next one. */ 580 ++ syn; 581 } 582 583 /* If we're at the end of the syntax string, we're done. */ 584 if (* syn == 0) 585 { 586 /* FIXME: For the moment we assume a valid `str' can only contain 587 blanks now. IE: We needn't try again with a longer version of 588 the insn and it is assumed that longer versions of insns appear 589 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ 590 while (ISSPACE (* str)) 591 ++ str; 592 593 if (* str != '\0') 594 return _("junk at end of line"); /* FIXME: would like to include `str' */ 595 596 return NULL; 597 } 598 599 /* We couldn't parse it. */ 600 return _("unrecognized instruction"); 601 } 602 603 /* Main entry point. 604 This routine is called for each instruction to be assembled. 605 STR points to the insn to be assembled. 606 We assume all necessary tables have been initialized. 607 The assembled instruction, less any fixups, is stored in BUF. 608 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value 609 still needs to be converted to target byte order, otherwise BUF is an array 610 of bytes in target byte order. 611 The result is a pointer to the insn's entry in the opcode table, 612 or NULL if an error occured (an error message will have already been 613 printed). 614 615 Note that when processing (non-alias) macro-insns, 616 this function recurses. 617 618 ??? It's possible to make this cpu-independent. 619 One would have to deal with a few minor things. 620 At this point in time doing so would be more of a curiosity than useful 621 [for example this file isn't _that_ big], but keeping the possibility in 622 mind helps keep the design clean. */ 623 624 const CGEN_INSN * 625 fr30_cgen_assemble_insn (cd, str, fields, buf, errmsg) 626 CGEN_CPU_DESC cd; 627 const char *str; 628 CGEN_FIELDS *fields; 629 CGEN_INSN_BYTES_PTR buf; 630 char **errmsg; 631 { 632 const char *start; 633 CGEN_INSN_LIST *ilist; 634 const char *parse_errmsg = NULL; 635 const char *insert_errmsg = NULL; 636 int recognized_mnemonic = 0; 637 638 /* Skip leading white space. */ 639 while (ISSPACE (* str)) 640 ++ str; 641 642 /* The instructions are stored in hashed lists. 643 Get the first in the list. */ 644 ilist = CGEN_ASM_LOOKUP_INSN (cd, str); 645 646 /* Keep looking until we find a match. */ 647 start = str; 648 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist)) 649 { 650 const CGEN_INSN *insn = ilist->insn; 651 recognized_mnemonic = 1; 652 653 #ifdef CGEN_VALIDATE_INSN_SUPPORTED 654 /* Not usually needed as unsupported opcodes 655 shouldn't be in the hash lists. */ 656 /* Is this insn supported by the selected cpu? */ 657 if (! fr30_cgen_insn_supported (cd, insn)) 658 continue; 659 #endif 660 /* If the RELAX attribute is set, this is an insn that shouldn't be 661 chosen immediately. Instead, it is used during assembler/linker 662 relaxation if possible. */ 663 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX) != 0) 664 continue; 665 666 str = start; 667 668 /* Skip this insn if str doesn't look right lexically. */ 669 if (CGEN_INSN_RX (insn) != NULL && 670 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH) 671 continue; 672 673 /* Allow parse/insert handlers to obtain length of insn. */ 674 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); 675 676 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields); 677 if (parse_errmsg != NULL) 678 continue; 679 680 /* ??? 0 is passed for `pc'. */ 681 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf, 682 (bfd_vma) 0); 683 if (insert_errmsg != NULL) 684 continue; 685 686 /* It is up to the caller to actually output the insn and any 687 queued relocs. */ 688 return insn; 689 } 690 691 { 692 static char errbuf[150]; 693 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS 694 const char *tmp_errmsg; 695 696 /* If requesting verbose error messages, use insert_errmsg. 697 Failing that, use parse_errmsg. */ 698 tmp_errmsg = (insert_errmsg ? insert_errmsg : 699 parse_errmsg ? parse_errmsg : 700 recognized_mnemonic ? 701 _("unrecognized form of instruction") : 702 _("unrecognized instruction")); 703 704 if (strlen (start) > 50) 705 /* xgettext:c-format */ 706 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start); 707 else 708 /* xgettext:c-format */ 709 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start); 710 #else 711 if (strlen (start) > 50) 712 /* xgettext:c-format */ 713 sprintf (errbuf, _("bad instruction `%.50s...'"), start); 714 else 715 /* xgettext:c-format */ 716 sprintf (errbuf, _("bad instruction `%.50s'"), start); 717 #endif 718 719 *errmsg = errbuf; 720 return NULL; 721 } 722 } 723 724 #if 0 /* This calls back to GAS which we can't do without care. */ 725 726 /* Record each member of OPVALS in the assembler's symbol table. 727 This lets GAS parse registers for us. 728 ??? Interesting idea but not currently used. */ 729 730 /* Record each member of OPVALS in the assembler's symbol table. 731 FIXME: Not currently used. */ 732 733 void 734 fr30_cgen_asm_hash_keywords (cd, opvals) 735 CGEN_CPU_DESC cd; 736 CGEN_KEYWORD *opvals; 737 { 738 CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL); 739 const CGEN_KEYWORD_ENTRY * ke; 740 741 while ((ke = cgen_keyword_search_next (& search)) != NULL) 742 { 743 #if 0 /* Unnecessary, should be done in the search routine. */ 744 if (! fr30_cgen_opval_supported (ke)) 745 continue; 746 #endif 747 cgen_asm_record_register (cd, ke->name, ke->value); 748 } 749 } 750 751 #endif /* 0 */ 752