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 "ip2k-desc.h" 35 #include "ip2k-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 54 static const char * 55 parse_fr (CGEN_CPU_DESC cd, 56 const char **strp, 57 int opindex, 58 unsigned long *valuep) 59 { 60 const char *errmsg; 61 const char *old_strp; 62 char *afteroffset; 63 enum cgen_parse_operand_result result_type; 64 bfd_vma value; 65 extern CGEN_KEYWORD ip2k_cgen_opval_register_names; 66 bfd_vma tempvalue; 67 68 old_strp = *strp; 69 afteroffset = NULL; 70 71 /* Check here to see if you're about to try parsing a w as the first arg 72 and return an error if you are. */ 73 if ((strncmp (*strp, "w", 1) == 0) || (strncmp (*strp, "W", 1) == 0)) 74 { 75 (*strp)++; 76 77 if ((strncmp (*strp, ",", 1) == 0) || ISSPACE (**strp)) 78 { 79 /* We've been passed a w. Return with an error message so that 80 cgen will try the next parsing option. */ 81 errmsg = _("W keyword invalid in FR operand slot."); 82 return errmsg; 83 } 84 *strp = old_strp; 85 } 86 87 /* Attempt parse as register keyword. */ 88 errmsg = cgen_parse_keyword (cd, strp, & ip2k_cgen_opval_register_names, 89 (long *) valuep); 90 if (*strp != NULL 91 && errmsg == NULL) 92 return errmsg; 93 94 /* Attempt to parse for "(IP)". */ 95 afteroffset = strstr (*strp, "(IP)"); 96 97 if (afteroffset == NULL) 98 /* Make sure it's not in lower case. */ 99 afteroffset = strstr (*strp, "(ip)"); 100 101 if (afteroffset != NULL) 102 { 103 if (afteroffset != *strp) 104 { 105 /* Invalid offset present. */ 106 errmsg = _("offset(IP) is not a valid form"); 107 return errmsg; 108 } 109 else 110 { 111 *strp += 4; 112 *valuep = 0; 113 errmsg = NULL; 114 return errmsg; 115 } 116 } 117 118 /* Attempt to parse for DP. ex: mov w, offset(DP) 119 mov offset(DP),w */ 120 121 /* Try parsing it as an address and see what comes back. */ 122 afteroffset = strstr (*strp, "(DP)"); 123 124 if (afteroffset == NULL) 125 /* Maybe it's in lower case. */ 126 afteroffset = strstr (*strp, "(dp)"); 127 128 if (afteroffset != NULL) 129 { 130 if (afteroffset == *strp) 131 { 132 /* No offset present. Use 0 by default. */ 133 tempvalue = 0; 134 errmsg = NULL; 135 } 136 else 137 errmsg = cgen_parse_address (cd, strp, opindex, 138 BFD_RELOC_IP2K_FR_OFFSET, 139 & result_type, & tempvalue); 140 141 if (errmsg == NULL) 142 { 143 if (tempvalue <= 127) 144 { 145 /* Value is ok. Fix up the first 2 bits and return. */ 146 *valuep = 0x0100 | tempvalue; 147 *strp += 4; /* Skip over the (DP) in *strp. */ 148 return errmsg; 149 } 150 else 151 { 152 /* Found something there in front of (DP) but it's out 153 of range. */ 154 errmsg = _("(DP) offset out of range."); 155 return errmsg; 156 } 157 } 158 } 159 160 161 /* Attempt to parse for SP. ex: mov w, offset(SP) 162 mov offset(SP), w. */ 163 afteroffset = strstr (*strp, "(SP)"); 164 165 if (afteroffset == NULL) 166 /* Maybe it's in lower case. */ 167 afteroffset = strstr (*strp, "(sp)"); 168 169 if (afteroffset != NULL) 170 { 171 if (afteroffset == *strp) 172 { 173 /* No offset present. Use 0 by default. */ 174 tempvalue = 0; 175 errmsg = NULL; 176 } 177 else 178 errmsg = cgen_parse_address (cd, strp, opindex, 179 BFD_RELOC_IP2K_FR_OFFSET, 180 & result_type, & tempvalue); 181 182 if (errmsg == NULL) 183 { 184 if (tempvalue <= 127) 185 { 186 /* Value is ok. Fix up the first 2 bits and return. */ 187 *valuep = 0x0180 | tempvalue; 188 *strp += 4; /* Skip over the (SP) in *strp. */ 189 return errmsg; 190 } 191 else 192 { 193 /* Found something there in front of (SP) but it's out 194 of range. */ 195 errmsg = _("(SP) offset out of range."); 196 return errmsg; 197 } 198 } 199 } 200 201 /* Attempt to parse as an address. */ 202 *strp = old_strp; 203 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IP2K_FR9, 204 & result_type, & value); 205 if (errmsg == NULL) 206 { 207 *valuep = value; 208 209 /* If a parenthesis is found, warn about invalid form. */ 210 if (**strp == '(') 211 errmsg = _("illegal use of parentheses"); 212 213 /* If a numeric value is specified, ensure that it is between 214 1 and 255. */ 215 else if (result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) 216 { 217 if (value < 0x1 || value > 0xff) 218 errmsg = _("operand out of range (not between 1 and 255)"); 219 } 220 } 221 return errmsg; 222 } 223 224 static const char * 225 parse_addr16 (CGEN_CPU_DESC cd, 226 const char **strp, 227 int opindex, 228 unsigned long *valuep) 229 { 230 const char *errmsg; 231 enum cgen_parse_operand_result result_type; 232 bfd_reloc_code_real_type code = BFD_RELOC_NONE; 233 bfd_vma value; 234 235 if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16H) 236 code = BFD_RELOC_IP2K_HI8DATA; 237 else if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16L) 238 code = BFD_RELOC_IP2K_LO8DATA; 239 else 240 { 241 /* Something is very wrong. opindex has to be one of the above. */ 242 errmsg = _("parse_addr16: invalid opindex."); 243 return errmsg; 244 } 245 246 errmsg = cgen_parse_address (cd, strp, opindex, code, 247 & result_type, & value); 248 if (errmsg == NULL) 249 { 250 /* We either have a relocation or a number now. */ 251 if (result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) 252 { 253 /* We got a number back. */ 254 if (code == BFD_RELOC_IP2K_HI8DATA) 255 value >>= 8; 256 else 257 /* code = BFD_RELOC_IP2K_LOW8DATA. */ 258 value &= 0x00FF; 259 } 260 *valuep = value; 261 } 262 263 return errmsg; 264 } 265 266 static const char * 267 parse_addr16_cjp (CGEN_CPU_DESC cd, 268 const char **strp, 269 int opindex, 270 unsigned long *valuep) 271 { 272 const char *errmsg; 273 enum cgen_parse_operand_result result_type; 274 bfd_reloc_code_real_type code = BFD_RELOC_NONE; 275 bfd_vma value; 276 277 if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16CJP) 278 code = BFD_RELOC_IP2K_ADDR16CJP; 279 else if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16P) 280 code = BFD_RELOC_IP2K_PAGE3; 281 282 errmsg = cgen_parse_address (cd, strp, opindex, code, 283 & result_type, & value); 284 if (errmsg == NULL) 285 { 286 if (result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) 287 { 288 if ((value & 0x1) == 0) /* If the address is even .... */ 289 { 290 if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16CJP) 291 *valuep = (value >> 1) & 0x1FFF; /* Should mask be 1FFF? */ 292 else if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16P) 293 *valuep = (value >> 14) & 0x7; 294 } 295 else 296 errmsg = _("Byte address required. - must be even."); 297 } 298 else if (result_type == CGEN_PARSE_OPERAND_RESULT_QUEUED) 299 { 300 /* This will happen for things like (s2-s1) where s2 and s1 301 are labels. */ 302 *valuep = value; 303 } 304 else 305 errmsg = _("cgen_parse_address returned a symbol. Literal required."); 306 } 307 return errmsg; 308 } 309 310 static const char * 311 parse_lit8 (CGEN_CPU_DESC cd, 312 const char **strp, 313 int opindex, 314 long *valuep) 315 { 316 const char *errmsg; 317 enum cgen_parse_operand_result result_type; 318 bfd_reloc_code_real_type code = BFD_RELOC_NONE; 319 bfd_vma value; 320 321 /* Parse %OP relocating operators. */ 322 if (strncmp (*strp, "%bank", 5) == 0) 323 { 324 *strp += 5; 325 code = BFD_RELOC_IP2K_BANK; 326 } 327 else if (strncmp (*strp, "%lo8data", 8) == 0) 328 { 329 *strp += 8; 330 code = BFD_RELOC_IP2K_LO8DATA; 331 } 332 else if (strncmp (*strp, "%hi8data", 8) == 0) 333 { 334 *strp += 8; 335 code = BFD_RELOC_IP2K_HI8DATA; 336 } 337 else if (strncmp (*strp, "%ex8data", 8) == 0) 338 { 339 *strp += 8; 340 code = BFD_RELOC_IP2K_EX8DATA; 341 } 342 else if (strncmp (*strp, "%lo8insn", 8) == 0) 343 { 344 *strp += 8; 345 code = BFD_RELOC_IP2K_LO8INSN; 346 } 347 else if (strncmp (*strp, "%hi8insn", 8) == 0) 348 { 349 *strp += 8; 350 code = BFD_RELOC_IP2K_HI8INSN; 351 } 352 353 /* Parse %op operand. */ 354 if (code != BFD_RELOC_NONE) 355 { 356 errmsg = cgen_parse_address (cd, strp, opindex, code, 357 & result_type, & value); 358 if ((errmsg == NULL) && 359 (result_type != CGEN_PARSE_OPERAND_RESULT_QUEUED)) 360 errmsg = _("percent-operator operand is not a symbol"); 361 362 *valuep = value; 363 } 364 /* Parse as a number. */ 365 else 366 { 367 errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep); 368 369 /* Truncate to eight bits to accept both signed and unsigned input. */ 370 if (errmsg == NULL) 371 *valuep &= 0xFF; 372 } 373 374 return errmsg; 375 } 376 377 static const char * 378 parse_bit3 (CGEN_CPU_DESC cd, 379 const char **strp, 380 int opindex, 381 unsigned long *valuep) 382 { 383 const char *errmsg; 384 char mode = 0; 385 long count = 0; 386 unsigned long value; 387 388 if (strncmp (*strp, "%bit", 4) == 0) 389 { 390 *strp += 4; 391 mode = 1; 392 } 393 else if (strncmp (*strp, "%msbbit", 7) == 0) 394 { 395 *strp += 7; 396 mode = 1; 397 } 398 else if (strncmp (*strp, "%lsbbit", 7) == 0) 399 { 400 *strp += 7; 401 mode = 2; 402 } 403 404 errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep); 405 if (errmsg) 406 return errmsg; 407 408 if (mode) 409 { 410 value = * valuep; 411 if (value == 0) 412 { 413 errmsg = _("Attempt to find bit index of 0"); 414 return errmsg; 415 } 416 417 if (mode == 1) 418 { 419 count = 31; 420 while ((value & 0x80000000) == 0) 421 { 422 count--; 423 value <<= 1; 424 } 425 } 426 else if (mode == 2) 427 { 428 count = 0; 429 while ((value & 0x00000001) == 0) 430 { 431 count++; 432 value >>= 1; 433 } 434 } 435 436 *valuep = count; 437 } 438 439 return errmsg; 440 } 441 442 /* -- dis.c */ 443 444 const char * ip2k_cgen_parse_operand 445 (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *); 446 447 /* Main entry point for operand parsing. 448 449 This function is basically just a big switch statement. Earlier versions 450 used tables to look up the function to use, but 451 - if the table contains both assembler and disassembler functions then 452 the disassembler contains much of the assembler and vice-versa, 453 - there's a lot of inlining possibilities as things grow, 454 - using a switch statement avoids the function call overhead. 455 456 This function could be moved into `parse_insn_normal', but keeping it 457 separate makes clear the interface between `parse_insn_normal' and each of 458 the handlers. */ 459 460 const char * 461 ip2k_cgen_parse_operand (CGEN_CPU_DESC cd, 462 int opindex, 463 const char ** strp, 464 CGEN_FIELDS * fields) 465 { 466 const char * errmsg = NULL; 467 /* Used by scalar operands that still need to be parsed. */ 468 long junk ATTRIBUTE_UNUSED; 469 470 switch (opindex) 471 { 472 case IP2K_OPERAND_ADDR16CJP : 473 errmsg = parse_addr16_cjp (cd, strp, IP2K_OPERAND_ADDR16CJP, (unsigned long *) (& fields->f_addr16cjp)); 474 break; 475 case IP2K_OPERAND_ADDR16H : 476 errmsg = parse_addr16 (cd, strp, IP2K_OPERAND_ADDR16H, (unsigned long *) (& fields->f_imm8)); 477 break; 478 case IP2K_OPERAND_ADDR16L : 479 errmsg = parse_addr16 (cd, strp, IP2K_OPERAND_ADDR16L, (unsigned long *) (& fields->f_imm8)); 480 break; 481 case IP2K_OPERAND_ADDR16P : 482 errmsg = parse_addr16_cjp (cd, strp, IP2K_OPERAND_ADDR16P, (unsigned long *) (& fields->f_page3)); 483 break; 484 case IP2K_OPERAND_BITNO : 485 errmsg = parse_bit3 (cd, strp, IP2K_OPERAND_BITNO, (unsigned long *) (& fields->f_bitno)); 486 break; 487 case IP2K_OPERAND_CBIT : 488 errmsg = cgen_parse_unsigned_integer (cd, strp, IP2K_OPERAND_CBIT, (unsigned long *) (& junk)); 489 break; 490 case IP2K_OPERAND_DCBIT : 491 errmsg = cgen_parse_unsigned_integer (cd, strp, IP2K_OPERAND_DCBIT, (unsigned long *) (& junk)); 492 break; 493 case IP2K_OPERAND_FR : 494 errmsg = parse_fr (cd, strp, IP2K_OPERAND_FR, (unsigned long *) (& fields->f_reg)); 495 break; 496 case IP2K_OPERAND_LIT8 : 497 errmsg = parse_lit8 (cd, strp, IP2K_OPERAND_LIT8, (long *) (& fields->f_imm8)); 498 break; 499 case IP2K_OPERAND_PABITS : 500 errmsg = cgen_parse_unsigned_integer (cd, strp, IP2K_OPERAND_PABITS, (unsigned long *) (& junk)); 501 break; 502 case IP2K_OPERAND_RETI3 : 503 errmsg = cgen_parse_unsigned_integer (cd, strp, IP2K_OPERAND_RETI3, (unsigned long *) (& fields->f_reti3)); 504 break; 505 case IP2K_OPERAND_ZBIT : 506 errmsg = cgen_parse_unsigned_integer (cd, strp, IP2K_OPERAND_ZBIT, (unsigned long *) (& junk)); 507 break; 508 509 default : 510 /* xgettext:c-format */ 511 fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex); 512 abort (); 513 } 514 515 return errmsg; 516 } 517 518 cgen_parse_fn * const ip2k_cgen_parse_handlers[] = 519 { 520 parse_insn_normal, 521 }; 522 523 void 524 ip2k_cgen_init_asm (CGEN_CPU_DESC cd) 525 { 526 ip2k_cgen_init_opcode_table (cd); 527 ip2k_cgen_init_ibld_table (cd); 528 cd->parse_handlers = & ip2k_cgen_parse_handlers[0]; 529 cd->parse_operand = ip2k_cgen_parse_operand; 530 #ifdef CGEN_ASM_INIT_HOOK 531 CGEN_ASM_INIT_HOOK 532 #endif 533 } 534 535 536 538 /* Regex construction routine. 539 540 This translates an opcode syntax string into a regex string, 541 by replacing any non-character syntax element (such as an 542 opcode) with the pattern '.*' 543 544 It then compiles the regex and stores it in the opcode, for 545 later use by ip2k_cgen_assemble_insn 546 547 Returns NULL for success, an error message for failure. */ 548 549 char * 550 ip2k_cgen_build_insn_regex (CGEN_INSN *insn) 551 { 552 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn); 553 const char *mnem = CGEN_INSN_MNEMONIC (insn); 554 char rxbuf[CGEN_MAX_RX_ELEMENTS]; 555 char *rx = rxbuf; 556 const CGEN_SYNTAX_CHAR_TYPE *syn; 557 int reg_err; 558 559 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc)); 560 561 /* Mnemonics come first in the syntax string. */ 562 if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) 563 return _("missing mnemonic in syntax string"); 564 ++syn; 565 566 /* Generate a case sensitive regular expression that emulates case 567 insensitive matching in the "C" locale. We cannot generate a case 568 insensitive regular expression because in Turkish locales, 'i' and 'I' 569 are not equal modulo case conversion. */ 570 571 /* Copy the literal mnemonic out of the insn. */ 572 for (; *mnem; mnem++) 573 { 574 char c = *mnem; 575 576 if (ISALPHA (c)) 577 { 578 *rx++ = '['; 579 *rx++ = TOLOWER (c); 580 *rx++ = TOUPPER (c); 581 *rx++ = ']'; 582 } 583 else 584 *rx++ = c; 585 } 586 587 /* Copy any remaining literals from the syntax string into the rx. */ 588 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn) 589 { 590 if (CGEN_SYNTAX_CHAR_P (* syn)) 591 { 592 char c = CGEN_SYNTAX_CHAR (* syn); 593 594 switch (c) 595 { 596 /* Escape any regex metacharacters in the syntax. */ 597 case '.': case '[': case '\\': 598 case '*': case '^': case '$': 599 600 #ifdef CGEN_ESCAPE_EXTENDED_REGEX 601 case '?': case '{': case '}': 602 case '(': case ')': case '*': 603 case '|': case '+': case ']': 604 #endif 605 *rx++ = '\\'; 606 *rx++ = c; 607 break; 608 609 default: 610 if (ISALPHA (c)) 611 { 612 *rx++ = '['; 613 *rx++ = TOLOWER (c); 614 *rx++ = TOUPPER (c); 615 *rx++ = ']'; 616 } 617 else 618 *rx++ = c; 619 break; 620 } 621 } 622 else 623 { 624 /* Replace non-syntax fields with globs. */ 625 *rx++ = '.'; 626 *rx++ = '*'; 627 } 628 } 629 630 /* Trailing whitespace ok. */ 631 * rx++ = '['; 632 * rx++ = ' '; 633 * rx++ = '\t'; 634 * rx++ = ']'; 635 * rx++ = '*'; 636 637 /* But anchor it after that. */ 638 * rx++ = '$'; 639 * rx = '\0'; 640 641 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t)); 642 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB); 643 644 if (reg_err == 0) 645 return NULL; 646 else 647 { 648 static char msg[80]; 649 650 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80); 651 regfree ((regex_t *) CGEN_INSN_RX (insn)); 652 free (CGEN_INSN_RX (insn)); 653 (CGEN_INSN_RX (insn)) = NULL; 654 return msg; 655 } 656 } 657 658 659 /* Default insn parser. 661 662 The syntax string is scanned and operands are parsed and stored in FIELDS. 663 Relocs are queued as we go via other callbacks. 664 665 ??? Note that this is currently an all-or-nothing parser. If we fail to 666 parse the instruction, we return 0 and the caller will start over from 667 the beginning. Backtracking will be necessary in parsing subexpressions, 668 but that can be handled there. Not handling backtracking here may get 669 expensive in the case of the m68k. Deal with later. 670 671 Returns NULL for success, an error message for failure. */ 672 673 static const char * 674 parse_insn_normal (CGEN_CPU_DESC cd, 675 const CGEN_INSN *insn, 676 const char **strp, 677 CGEN_FIELDS *fields) 678 { 679 /* ??? Runtime added insns not handled yet. */ 680 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); 681 const char *str = *strp; 682 const char *errmsg; 683 const char *p; 684 const CGEN_SYNTAX_CHAR_TYPE * syn; 685 #ifdef CGEN_MNEMONIC_OPERANDS 686 /* FIXME: wip */ 687 int past_opcode_p; 688 #endif 689 690 /* For now we assume the mnemonic is first (there are no leading operands). 691 We can parse it without needing to set up operand parsing. 692 GAS's input scrubber will ensure mnemonics are lowercase, but we may 693 not be called from GAS. */ 694 p = CGEN_INSN_MNEMONIC (insn); 695 while (*p && TOLOWER (*p) == TOLOWER (*str)) 696 ++p, ++str; 697 698 if (* p) 699 return _("unrecognized instruction"); 700 701 #ifndef CGEN_MNEMONIC_OPERANDS 702 if (* str && ! ISSPACE (* str)) 703 return _("unrecognized instruction"); 704 #endif 705 706 CGEN_INIT_PARSE (cd); 707 cgen_init_parse_operand (cd); 708 #ifdef CGEN_MNEMONIC_OPERANDS 709 past_opcode_p = 0; 710 #endif 711 712 /* We don't check for (*str != '\0') here because we want to parse 713 any trailing fake arguments in the syntax string. */ 714 syn = CGEN_SYNTAX_STRING (syntax); 715 716 /* Mnemonics come first for now, ensure valid string. */ 717 if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) 718 abort (); 719 720 ++syn; 721 722 while (* syn != 0) 723 { 724 /* Non operand chars must match exactly. */ 725 if (CGEN_SYNTAX_CHAR_P (* syn)) 726 { 727 /* FIXME: While we allow for non-GAS callers above, we assume the 728 first char after the mnemonic part is a space. */ 729 /* FIXME: We also take inappropriate advantage of the fact that 730 GAS's input scrubber will remove extraneous blanks. */ 731 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn))) 732 { 733 #ifdef CGEN_MNEMONIC_OPERANDS 734 if (CGEN_SYNTAX_CHAR(* syn) == ' ') 735 past_opcode_p = 1; 736 #endif 737 ++ syn; 738 ++ str; 739 } 740 else if (*str) 741 { 742 /* Syntax char didn't match. Can't be this insn. */ 743 static char msg [80]; 744 745 /* xgettext:c-format */ 746 sprintf (msg, _("syntax error (expected char `%c', found `%c')"), 747 CGEN_SYNTAX_CHAR(*syn), *str); 748 return msg; 749 } 750 else 751 { 752 /* Ran out of input. */ 753 static char msg [80]; 754 755 /* xgettext:c-format */ 756 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"), 757 CGEN_SYNTAX_CHAR(*syn)); 758 return msg; 759 } 760 continue; 761 } 762 763 #ifdef CGEN_MNEMONIC_OPERANDS 764 (void) past_opcode_p; 765 #endif 766 /* We have an operand of some sort. */ 767 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields); 768 if (errmsg) 769 return errmsg; 770 771 /* Done with this operand, continue with next one. */ 772 ++ syn; 773 } 774 775 /* If we're at the end of the syntax string, we're done. */ 776 if (* syn == 0) 777 { 778 /* FIXME: For the moment we assume a valid `str' can only contain 779 blanks now. IE: We needn't try again with a longer version of 780 the insn and it is assumed that longer versions of insns appear 781 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ 782 while (ISSPACE (* str)) 783 ++ str; 784 785 if (* str != '\0') 786 return _("junk at end of line"); /* FIXME: would like to include `str' */ 787 788 return NULL; 789 } 790 791 /* We couldn't parse it. */ 792 return _("unrecognized instruction"); 793 } 794 795 /* Main entry point. 797 This routine is called for each instruction to be assembled. 798 STR points to the insn to be assembled. 799 We assume all necessary tables have been initialized. 800 The assembled instruction, less any fixups, is stored in BUF. 801 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value 802 still needs to be converted to target byte order, otherwise BUF is an array 803 of bytes in target byte order. 804 The result is a pointer to the insn's entry in the opcode table, 805 or NULL if an error occured (an error message will have already been 806 printed). 807 808 Note that when processing (non-alias) macro-insns, 809 this function recurses. 810 811 ??? It's possible to make this cpu-independent. 812 One would have to deal with a few minor things. 813 At this point in time doing so would be more of a curiosity than useful 814 [for example this file isn't _that_ big], but keeping the possibility in 815 mind helps keep the design clean. */ 816 817 const CGEN_INSN * 818 ip2k_cgen_assemble_insn (CGEN_CPU_DESC cd, 819 const char *str, 820 CGEN_FIELDS *fields, 821 CGEN_INSN_BYTES_PTR buf, 822 char **errmsg) 823 { 824 const char *start; 825 CGEN_INSN_LIST *ilist; 826 const char *parse_errmsg = NULL; 827 const char *insert_errmsg = NULL; 828 int recognized_mnemonic = 0; 829 830 /* Skip leading white space. */ 831 while (ISSPACE (* str)) 832 ++ str; 833 834 /* The instructions are stored in hashed lists. 835 Get the first in the list. */ 836 ilist = CGEN_ASM_LOOKUP_INSN (cd, str); 837 838 /* Keep looking until we find a match. */ 839 start = str; 840 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist)) 841 { 842 const CGEN_INSN *insn = ilist->insn; 843 recognized_mnemonic = 1; 844 845 #ifdef CGEN_VALIDATE_INSN_SUPPORTED 846 /* Not usually needed as unsupported opcodes 847 shouldn't be in the hash lists. */ 848 /* Is this insn supported by the selected cpu? */ 849 if (! ip2k_cgen_insn_supported (cd, insn)) 850 continue; 851 #endif 852 /* If the RELAXED attribute is set, this is an insn that shouldn't be 853 chosen immediately. Instead, it is used during assembler/linker 854 relaxation if possible. */ 855 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0) 856 continue; 857 858 str = start; 859 860 /* Skip this insn if str doesn't look right lexically. */ 861 if (CGEN_INSN_RX (insn) != NULL && 862 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH) 863 continue; 864 865 /* Allow parse/insert handlers to obtain length of insn. */ 866 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); 867 868 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields); 869 if (parse_errmsg != NULL) 870 continue; 871 872 /* ??? 0 is passed for `pc'. */ 873 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf, 874 (bfd_vma) 0); 875 if (insert_errmsg != NULL) 876 continue; 877 878 /* It is up to the caller to actually output the insn and any 879 queued relocs. */ 880 return insn; 881 } 882 883 { 884 static char errbuf[150]; 885 const char *tmp_errmsg; 886 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS 887 #define be_verbose 1 888 #else 889 #define be_verbose 0 890 #endif 891 892 if (be_verbose) 893 { 894 /* If requesting verbose error messages, use insert_errmsg. 895 Failing that, use parse_errmsg. */ 896 tmp_errmsg = (insert_errmsg ? insert_errmsg : 897 parse_errmsg ? parse_errmsg : 898 recognized_mnemonic ? 899 _("unrecognized form of instruction") : 900 _("unrecognized instruction")); 901 902 if (strlen (start) > 50) 903 /* xgettext:c-format */ 904 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start); 905 else 906 /* xgettext:c-format */ 907 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start); 908 } 909 else 910 { 911 if (strlen (start) > 50) 912 /* xgettext:c-format */ 913 sprintf (errbuf, _("bad instruction `%.50s...'"), start); 914 else 915 /* xgettext:c-format */ 916 sprintf (errbuf, _("bad instruction `%.50s'"), start); 917 } 918 919 *errmsg = errbuf; 920 return NULL; 921 } 922 } 923
