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 (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 (CGEN_INSN *insn) 360 { 361 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn); 362 const char *mnem = CGEN_INSN_MNEMONIC (insn); 363 char rxbuf[CGEN_MAX_RX_ELEMENTS]; 364 char *rx = rxbuf; 365 const CGEN_SYNTAX_CHAR_TYPE *syn; 366 int reg_err; 367 368 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc)); 369 370 /* Mnemonics come first in the syntax string. */ 371 if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) 372 return _("missing mnemonic in syntax string"); 373 ++syn; 374 375 /* Generate a case sensitive regular expression that emulates case 376 insensitive matching in the "C" locale. We cannot generate a case 377 insensitive regular expression because in Turkish locales, 'i' and 'I' 378 are not equal modulo case conversion. */ 379 380 /* Copy the literal mnemonic out of the insn. */ 381 for (; *mnem; mnem++) 382 { 383 char c = *mnem; 384 385 if (ISALPHA (c)) 386 { 387 *rx++ = '['; 388 *rx++ = TOLOWER (c); 389 *rx++ = TOUPPER (c); 390 *rx++ = ']'; 391 } 392 else 393 *rx++ = c; 394 } 395 396 /* Copy any remaining literals from the syntax string into the rx. */ 397 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn) 398 { 399 if (CGEN_SYNTAX_CHAR_P (* syn)) 400 { 401 char c = CGEN_SYNTAX_CHAR (* syn); 402 403 switch (c) 404 { 405 /* Escape any regex metacharacters in the syntax. */ 406 case '.': case '[': case '\\': 407 case '*': case '^': case '$': 408 409 #ifdef CGEN_ESCAPE_EXTENDED_REGEX 410 case '?': case '{': case '}': 411 case '(': case ')': case '*': 412 case '|': case '+': case ']': 413 #endif 414 *rx++ = '\\'; 415 *rx++ = c; 416 break; 417 418 default: 419 if (ISALPHA (c)) 420 { 421 *rx++ = '['; 422 *rx++ = TOLOWER (c); 423 *rx++ = TOUPPER (c); 424 *rx++ = ']'; 425 } 426 else 427 *rx++ = c; 428 break; 429 } 430 } 431 else 432 { 433 /* Replace non-syntax fields with globs. */ 434 *rx++ = '.'; 435 *rx++ = '*'; 436 } 437 } 438 439 /* Trailing whitespace ok. */ 440 * rx++ = '['; 441 * rx++ = ' '; 442 * rx++ = '\t'; 443 * rx++ = ']'; 444 * rx++ = '*'; 445 446 /* But anchor it after that. */ 447 * rx++ = '$'; 448 * rx = '\0'; 449 450 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t)); 451 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB); 452 453 if (reg_err == 0) 454 return NULL; 455 else 456 { 457 static char msg[80]; 458 459 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80); 460 regfree ((regex_t *) CGEN_INSN_RX (insn)); 461 free (CGEN_INSN_RX (insn)); 462 (CGEN_INSN_RX (insn)) = NULL; 463 return msg; 464 } 465 } 466 467 468 /* Default insn parser. 469 470 The syntax string is scanned and operands are parsed and stored in FIELDS. 471 Relocs are queued as we go via other callbacks. 472 473 ??? Note that this is currently an all-or-nothing parser. If we fail to 474 parse the instruction, we return 0 and the caller will start over from 475 the beginning. Backtracking will be necessary in parsing subexpressions, 476 but that can be handled there. Not handling backtracking here may get 477 expensive in the case of the m68k. Deal with later. 478 479 Returns NULL for success, an error message for failure. */ 480 481 static const char * 482 parse_insn_normal (CGEN_CPU_DESC cd, 483 const CGEN_INSN *insn, 484 const char **strp, 485 CGEN_FIELDS *fields) 486 { 487 /* ??? Runtime added insns not handled yet. */ 488 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); 489 const char *str = *strp; 490 const char *errmsg; 491 const char *p; 492 const CGEN_SYNTAX_CHAR_TYPE * syn; 493 #ifdef CGEN_MNEMONIC_OPERANDS 494 /* FIXME: wip */ 495 int past_opcode_p; 496 #endif 497 498 /* For now we assume the mnemonic is first (there are no leading operands). 499 We can parse it without needing to set up operand parsing. 500 GAS's input scrubber will ensure mnemonics are lowercase, but we may 501 not be called from GAS. */ 502 p = CGEN_INSN_MNEMONIC (insn); 503 while (*p && TOLOWER (*p) == TOLOWER (*str)) 504 ++p, ++str; 505 506 if (* p) 507 return _("unrecognized instruction"); 508 509 #ifndef CGEN_MNEMONIC_OPERANDS 510 if (* str && ! ISSPACE (* str)) 511 return _("unrecognized instruction"); 512 #endif 513 514 CGEN_INIT_PARSE (cd); 515 cgen_init_parse_operand (cd); 516 #ifdef CGEN_MNEMONIC_OPERANDS 517 past_opcode_p = 0; 518 #endif 519 520 /* We don't check for (*str != '\0') here because we want to parse 521 any trailing fake arguments in the syntax string. */ 522 syn = CGEN_SYNTAX_STRING (syntax); 523 524 /* Mnemonics come first for now, ensure valid string. */ 525 if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) 526 abort (); 527 528 ++syn; 529 530 while (* syn != 0) 531 { 532 /* Non operand chars must match exactly. */ 533 if (CGEN_SYNTAX_CHAR_P (* syn)) 534 { 535 /* FIXME: While we allow for non-GAS callers above, we assume the 536 first char after the mnemonic part is a space. */ 537 /* FIXME: We also take inappropriate advantage of the fact that 538 GAS's input scrubber will remove extraneous blanks. */ 539 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn))) 540 { 541 #ifdef CGEN_MNEMONIC_OPERANDS 542 if (CGEN_SYNTAX_CHAR(* syn) == ' ') 543 past_opcode_p = 1; 544 #endif 545 ++ syn; 546 ++ str; 547 } 548 else if (*str) 549 { 550 /* Syntax char didn't match. Can't be this insn. */ 551 static char msg [80]; 552 553 /* xgettext:c-format */ 554 sprintf (msg, _("syntax error (expected char `%c', found `%c')"), 555 CGEN_SYNTAX_CHAR(*syn), *str); 556 return msg; 557 } 558 else 559 { 560 /* Ran out of input. */ 561 static char msg [80]; 562 563 /* xgettext:c-format */ 564 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"), 565 CGEN_SYNTAX_CHAR(*syn)); 566 return msg; 567 } 568 continue; 569 } 570 571 /* We have an operand of some sort. */ 572 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), 573 &str, fields); 574 if (errmsg) 575 return errmsg; 576 577 /* Done with this operand, continue with next one. */ 578 ++ syn; 579 } 580 581 /* If we're at the end of the syntax string, we're done. */ 582 if (* syn == 0) 583 { 584 /* FIXME: For the moment we assume a valid `str' can only contain 585 blanks now. IE: We needn't try again with a longer version of 586 the insn and it is assumed that longer versions of insns appear 587 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ 588 while (ISSPACE (* str)) 589 ++ str; 590 591 if (* str != '\0') 592 return _("junk at end of line"); /* FIXME: would like to include `str' */ 593 594 return NULL; 595 } 596 597 /* We couldn't parse it. */ 598 return _("unrecognized instruction"); 599 } 600 601 /* Main entry point. 602 This routine is called for each instruction to be assembled. 603 STR points to the insn to be assembled. 604 We assume all necessary tables have been initialized. 605 The assembled instruction, less any fixups, is stored in BUF. 606 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value 607 still needs to be converted to target byte order, otherwise BUF is an array 608 of bytes in target byte order. 609 The result is a pointer to the insn's entry in the opcode table, 610 or NULL if an error occured (an error message will have already been 611 printed). 612 613 Note that when processing (non-alias) macro-insns, 614 this function recurses. 615 616 ??? It's possible to make this cpu-independent. 617 One would have to deal with a few minor things. 618 At this point in time doing so would be more of a curiosity than useful 619 [for example this file isn't _that_ big], but keeping the possibility in 620 mind helps keep the design clean. */ 621 622 const CGEN_INSN * 623 fr30_cgen_assemble_insn (CGEN_CPU_DESC cd, 624 const char *str, 625 CGEN_FIELDS *fields, 626 CGEN_INSN_BYTES_PTR buf, 627 char **errmsg) 628 { 629 const char *start; 630 CGEN_INSN_LIST *ilist; 631 const char *parse_errmsg = NULL; 632 const char *insert_errmsg = NULL; 633 int recognized_mnemonic = 0; 634 635 /* Skip leading white space. */ 636 while (ISSPACE (* str)) 637 ++ str; 638 639 /* The instructions are stored in hashed lists. 640 Get the first in the list. */ 641 ilist = CGEN_ASM_LOOKUP_INSN (cd, str); 642 643 /* Keep looking until we find a match. */ 644 start = str; 645 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist)) 646 { 647 const CGEN_INSN *insn = ilist->insn; 648 recognized_mnemonic = 1; 649 650 #ifdef CGEN_VALIDATE_INSN_SUPPORTED 651 /* Not usually needed as unsupported opcodes 652 shouldn't be in the hash lists. */ 653 /* Is this insn supported by the selected cpu? */ 654 if (! fr30_cgen_insn_supported (cd, insn)) 655 continue; 656 #endif 657 /* If the RELAXED attribute is set, this is an insn that shouldn't be 658 chosen immediately. Instead, it is used during assembler/linker 659 relaxation if possible. */ 660 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0) 661 continue; 662 663 str = start; 664 665 /* Skip this insn if str doesn't look right lexically. */ 666 if (CGEN_INSN_RX (insn) != NULL && 667 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH) 668 continue; 669 670 /* Allow parse/insert handlers to obtain length of insn. */ 671 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); 672 673 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields); 674 if (parse_errmsg != NULL) 675 continue; 676 677 /* ??? 0 is passed for `pc'. */ 678 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf, 679 (bfd_vma) 0); 680 if (insert_errmsg != NULL) 681 continue; 682 683 /* It is up to the caller to actually output the insn and any 684 queued relocs. */ 685 return insn; 686 } 687 688 { 689 static char errbuf[150]; 690 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS 691 const char *tmp_errmsg; 692 693 /* If requesting verbose error messages, use insert_errmsg. 694 Failing that, use parse_errmsg. */ 695 tmp_errmsg = (insert_errmsg ? insert_errmsg : 696 parse_errmsg ? parse_errmsg : 697 recognized_mnemonic ? 698 _("unrecognized form of instruction") : 699 _("unrecognized instruction")); 700 701 if (strlen (start) > 50) 702 /* xgettext:c-format */ 703 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start); 704 else 705 /* xgettext:c-format */ 706 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start); 707 #else 708 if (strlen (start) > 50) 709 /* xgettext:c-format */ 710 sprintf (errbuf, _("bad instruction `%.50s...'"), start); 711 else 712 /* xgettext:c-format */ 713 sprintf (errbuf, _("bad instruction `%.50s'"), start); 714 #endif 715 716 *errmsg = errbuf; 717 return NULL; 718 } 719 } 720 721 #if 0 /* This calls back to GAS which we can't do without care. */ 722 723 /* Record each member of OPVALS in the assembler's symbol table. 724 This lets GAS parse registers for us. 725 ??? Interesting idea but not currently used. */ 726 727 /* Record each member of OPVALS in the assembler's symbol table. 728 FIXME: Not currently used. */ 729 730 void 731 fr30_cgen_asm_hash_keywords (CGEN_CPU_DESC cd, CGEN_KEYWORD *opvals) 732 { 733 CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL); 734 const CGEN_KEYWORD_ENTRY * ke; 735 736 while ((ke = cgen_keyword_search_next (& search)) != NULL) 737 { 738 #if 0 /* Unnecessary, should be done in the search routine. */ 739 if (! fr30_cgen_opval_supported (ke)) 740 continue; 741 #endif 742 cgen_asm_record_register (cd, ke->name, ke->value); 743 } 744 } 745 746 #endif /* 0 */ 747