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 "iq2000-desc.h" 35 #include "iq2000-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 #include "safe-ctype.h" 55 56 static const char * MISSING_CLOSING_PARENTHESIS = N_("missing `)'"); 57 58 /* Special check to ensure that instruction exists for given machine. */ 59 60 int 61 iq2000_cgen_insn_supported (CGEN_CPU_DESC cd, const CGEN_INSN *insn) 62 { 63 int machs = cd->machs; 64 65 return (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_MACH) & machs) != 0; 66 } 67 68 static int 69 iq2000_cgen_isa_register (const char **strp) 70 { 71 int len; 72 int ch1, ch2; 73 74 if (**strp == 'r' || **strp == 'R') 75 { 76 len = strlen (*strp); 77 if (len == 2) 78 { 79 ch1 = (*strp)[1]; 80 if ('0' <= ch1 && ch1 <= '9') 81 return 1; 82 } 83 else if (len == 3) 84 { 85 ch1 = (*strp)[1]; 86 ch2 = (*strp)[2]; 87 if (('1' <= ch1 && ch1 <= '2') && ('0' <= ch2 && ch2 <= '9')) 88 return 1; 89 if ('3' == ch1 && (ch2 == '0' || ch2 == '1')) 90 return 1; 91 } 92 } 93 if (**strp == '%' 94 && TOLOWER ((*strp)[1]) != 'l' 95 && TOLOWER ((*strp)[1]) != 'h') 96 return 1; 97 return 0; 98 } 99 100 /* Handle negated literal. */ 101 102 static const char * 103 parse_mimm (CGEN_CPU_DESC cd, 104 const char **strp, 105 int opindex, 106 unsigned long *valuep) 107 { 108 const char *errmsg; 109 110 /* Verify this isn't a register. */ 111 if (iq2000_cgen_isa_register (strp)) 112 errmsg = _("immediate value cannot be register"); 113 else 114 { 115 long value; 116 117 errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value); 118 if (errmsg == NULL) 119 { 120 long x = (-value) & 0xFFFF0000; 121 122 if (x != 0 && x != (long) 0xFFFF0000) 123 errmsg = _("immediate value out of range"); 124 else 125 *valuep = (-value & 0xFFFF); 126 } 127 } 128 return errmsg; 129 } 130 131 /* Handle signed/unsigned literal. */ 132 133 static const char * 134 parse_imm (CGEN_CPU_DESC cd, 135 const char **strp, 136 int opindex, 137 unsigned long *valuep) 138 { 139 const char *errmsg; 140 141 if (iq2000_cgen_isa_register (strp)) 142 errmsg = _("immediate value cannot be register"); 143 else 144 { 145 long value; 146 147 errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value); 148 if (errmsg == NULL) 149 { 150 long x = value & 0xFFFF0000; 151 152 if (x != 0 && x != (long) 0xFFFF0000) 153 errmsg = _("immediate value out of range"); 154 else 155 *valuep = (value & 0xFFFF); 156 } 157 } 158 return errmsg; 159 } 160 161 /* Handle iq10 21-bit jmp offset. */ 162 163 static const char * 164 parse_jtargq10 (CGEN_CPU_DESC cd, 165 const char **strp, 166 int opindex, 167 int reloc ATTRIBUTE_UNUSED, 168 enum cgen_parse_operand_result *type_addr ATTRIBUTE_UNUSED, 169 bfd_vma *valuep) 170 { 171 const char *errmsg; 172 bfd_vma value; 173 enum cgen_parse_operand_result result_type = CGEN_PARSE_OPERAND_RESULT_NUMBER; 174 175 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IQ2000_OFFSET_21, 176 & result_type, & value); 177 if (errmsg == NULL && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) 178 { 179 /* Check value is within 23-bits 180 (remembering that 2-bit shift right will occur). */ 181 if (value > 0x7fffff) 182 return _("21-bit offset out of range"); 183 } 184 *valuep = (value & 0x7FFFFF); 185 return errmsg; 186 } 187 188 /* Handle high(). */ 189 190 static const char * 191 parse_hi16 (CGEN_CPU_DESC cd, 192 const char **strp, 193 int opindex, 194 unsigned long *valuep) 195 { 196 if (strncasecmp (*strp, "%hi(", 4) == 0) 197 { 198 enum cgen_parse_operand_result result_type; 199 bfd_vma value; 200 const char *errmsg; 201 202 *strp += 4; 203 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16, 204 & result_type, & value); 205 if (**strp != ')') 206 return MISSING_CLOSING_PARENTHESIS; 207 208 ++*strp; 209 if (errmsg == NULL 210 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) 211 { 212 /* If value has top-bit of %lo on, then it will 213 sign-propagate and so we compensate by adding 214 1 to the resultant %hi value. */ 215 if (value & 0x8000) 216 value += 0x10000; 217 value >>= 16; 218 value &= 0xffff; 219 } 220 *valuep = value; 221 222 return errmsg; 223 } 224 225 /* We add %uhi in case a user just wants the high 16-bits or is using 226 an insn like ori for %lo which does not sign-propagate. */ 227 if (strncasecmp (*strp, "%uhi(", 5) == 0) 228 { 229 enum cgen_parse_operand_result result_type; 230 bfd_vma value; 231 const char *errmsg; 232 233 *strp += 5; 234 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IQ2000_UHI16, 235 & result_type, & value); 236 if (**strp != ')') 237 return MISSING_CLOSING_PARENTHESIS; 238 239 ++*strp; 240 if (errmsg == NULL 241 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) 242 value >>= 16; 243 244 value &= 0xffff; 245 *valuep = value; 246 247 return errmsg; 248 } 249 250 return parse_imm (cd, strp, opindex, valuep); 251 } 252 253 /* Handle %lo in a signed context. 254 The signedness of the value doesn't matter to %lo(), but this also 255 handles the case where %lo() isn't present. */ 256 257 static const char * 258 parse_lo16 (CGEN_CPU_DESC cd, 259 const char **strp, 260 int opindex, 261 unsigned long *valuep) 262 { 263 if (strncasecmp (*strp, "%lo(", 4) == 0) 264 { 265 const char *errmsg; 266 enum cgen_parse_operand_result result_type; 267 bfd_vma value; 268 269 *strp += 4; 270 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16, 271 & result_type, & value); 272 if (**strp != ')') 273 return MISSING_CLOSING_PARENTHESIS; 274 ++*strp; 275 if (errmsg == NULL 276 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) 277 value &= 0xffff; 278 *valuep = value; 279 return errmsg; 280 } 281 282 return parse_imm (cd, strp, opindex, valuep); 283 } 284 285 /* Handle %lo in a negated signed context. 286 The signedness of the value doesn't matter to %lo(), but this also 287 handles the case where %lo() isn't present. */ 288 289 static const char * 290 parse_mlo16 (CGEN_CPU_DESC cd, 291 const char **strp, 292 int opindex, 293 unsigned long *valuep) 294 { 295 if (strncasecmp (*strp, "%lo(", 4) == 0) 296 { 297 const char *errmsg; 298 enum cgen_parse_operand_result result_type; 299 bfd_vma value; 300 301 *strp += 4; 302 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16, 303 & result_type, & value); 304 if (**strp != ')') 305 return MISSING_CLOSING_PARENTHESIS; 306 ++*strp; 307 if (errmsg == NULL 308 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) 309 value = (-value) & 0xffff; 310 *valuep = value; 311 return errmsg; 312 } 313 314 return parse_mimm (cd, strp, opindex, valuep); 315 } 316 317 /* -- */ 318 319 const char * iq2000_cgen_parse_operand 320 (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *); 321 322 /* Main entry point for operand parsing. 323 324 This function is basically just a big switch statement. Earlier versions 325 used tables to look up the function to use, but 326 - if the table contains both assembler and disassembler functions then 327 the disassembler contains much of the assembler and vice-versa, 328 - there's a lot of inlining possibilities as things grow, 329 - using a switch statement avoids the function call overhead. 330 331 This function could be moved into `parse_insn_normal', but keeping it 332 separate makes clear the interface between `parse_insn_normal' and each of 333 the handlers. */ 334 335 const char * 336 iq2000_cgen_parse_operand (CGEN_CPU_DESC cd, 337 int opindex, 338 const char ** strp, 339 CGEN_FIELDS * fields) 340 { 341 const char * errmsg = NULL; 342 /* Used by scalar operands that still need to be parsed. */ 343 long junk ATTRIBUTE_UNUSED; 344 345 switch (opindex) 346 { 347 case IQ2000_OPERAND__INDEX : 348 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND__INDEX, (unsigned long *) (& fields->f_index)); 349 break; 350 case IQ2000_OPERAND_BASE : 351 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rs); 352 break; 353 case IQ2000_OPERAND_BASEOFF : 354 { 355 bfd_vma value = 0; 356 errmsg = cgen_parse_address (cd, strp, IQ2000_OPERAND_BASEOFF, 0, NULL, & value); 357 fields->f_imm = value; 358 } 359 break; 360 case IQ2000_OPERAND_BITNUM : 361 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_BITNUM, (unsigned long *) (& fields->f_rt)); 362 break; 363 case IQ2000_OPERAND_BYTECOUNT : 364 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_BYTECOUNT, (unsigned long *) (& fields->f_bytecount)); 365 break; 366 case IQ2000_OPERAND_CAM_Y : 367 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CAM_Y, (unsigned long *) (& fields->f_cam_y)); 368 break; 369 case IQ2000_OPERAND_CAM_Z : 370 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CAM_Z, (unsigned long *) (& fields->f_cam_z)); 371 break; 372 case IQ2000_OPERAND_CM_3FUNC : 373 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CM_3FUNC, (unsigned long *) (& fields->f_cm_3func)); 374 break; 375 case IQ2000_OPERAND_CM_3Z : 376 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CM_3Z, (unsigned long *) (& fields->f_cm_3z)); 377 break; 378 case IQ2000_OPERAND_CM_4FUNC : 379 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CM_4FUNC, (unsigned long *) (& fields->f_cm_4func)); 380 break; 381 case IQ2000_OPERAND_CM_4Z : 382 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CM_4Z, (unsigned long *) (& fields->f_cm_4z)); 383 break; 384 case IQ2000_OPERAND_COUNT : 385 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_COUNT, (unsigned long *) (& fields->f_count)); 386 break; 387 case IQ2000_OPERAND_EXECODE : 388 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_EXECODE, (unsigned long *) (& fields->f_excode)); 389 break; 390 case IQ2000_OPERAND_HI16 : 391 errmsg = parse_hi16 (cd, strp, IQ2000_OPERAND_HI16, (unsigned long *) (& fields->f_imm)); 392 break; 393 case IQ2000_OPERAND_IMM : 394 errmsg = parse_imm (cd, strp, IQ2000_OPERAND_IMM, (unsigned long *) (& fields->f_imm)); 395 break; 396 case IQ2000_OPERAND_JMPTARG : 397 { 398 bfd_vma value = 0; 399 errmsg = cgen_parse_address (cd, strp, IQ2000_OPERAND_JMPTARG, 0, NULL, & value); 400 fields->f_jtarg = value; 401 } 402 break; 403 case IQ2000_OPERAND_JMPTARGQ10 : 404 { 405 bfd_vma value = 0; 406 errmsg = parse_jtargq10 (cd, strp, IQ2000_OPERAND_JMPTARGQ10, 0, NULL, & value); 407 fields->f_jtargq10 = value; 408 } 409 break; 410 case IQ2000_OPERAND_LO16 : 411 errmsg = parse_lo16 (cd, strp, IQ2000_OPERAND_LO16, (unsigned long *) (& fields->f_imm)); 412 break; 413 case IQ2000_OPERAND_MASK : 414 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_MASK, (unsigned long *) (& fields->f_mask)); 415 break; 416 case IQ2000_OPERAND_MASKL : 417 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_MASKL, (unsigned long *) (& fields->f_maskl)); 418 break; 419 case IQ2000_OPERAND_MASKQ10 : 420 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_MASKQ10, (unsigned long *) (& fields->f_maskq10)); 421 break; 422 case IQ2000_OPERAND_MASKR : 423 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_MASKR, (unsigned long *) (& fields->f_rs)); 424 break; 425 case IQ2000_OPERAND_MLO16 : 426 errmsg = parse_mlo16 (cd, strp, IQ2000_OPERAND_MLO16, (unsigned long *) (& fields->f_imm)); 427 break; 428 case IQ2000_OPERAND_OFFSET : 429 { 430 bfd_vma value = 0; 431 errmsg = cgen_parse_address (cd, strp, IQ2000_OPERAND_OFFSET, 0, NULL, & value); 432 fields->f_offset = value; 433 } 434 break; 435 case IQ2000_OPERAND_RD : 436 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rd); 437 break; 438 case IQ2000_OPERAND_RD_RS : 439 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rd_rs); 440 break; 441 case IQ2000_OPERAND_RD_RT : 442 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rd_rt); 443 break; 444 case IQ2000_OPERAND_RS : 445 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rs); 446 break; 447 case IQ2000_OPERAND_RT : 448 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rt); 449 break; 450 case IQ2000_OPERAND_RT_RS : 451 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rt_rs); 452 break; 453 case IQ2000_OPERAND_SHAMT : 454 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_SHAMT, (unsigned long *) (& fields->f_shamt)); 455 break; 456 457 default : 458 /* xgettext:c-format */ 459 fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex); 460 abort (); 461 } 462 463 return errmsg; 464 } 465 466 cgen_parse_fn * const iq2000_cgen_parse_handlers[] = 467 { 468 parse_insn_normal, 469 }; 470 471 void 472 iq2000_cgen_init_asm (CGEN_CPU_DESC cd) 473 { 474 iq2000_cgen_init_opcode_table (cd); 475 iq2000_cgen_init_ibld_table (cd); 476 cd->parse_handlers = & iq2000_cgen_parse_handlers[0]; 477 cd->parse_operand = iq2000_cgen_parse_operand; 478 #ifdef CGEN_ASM_INIT_HOOK 479 CGEN_ASM_INIT_HOOK 480 #endif 481 } 482 483 484 486 /* Regex construction routine. 487 488 This translates an opcode syntax string into a regex string, 489 by replacing any non-character syntax element (such as an 490 opcode) with the pattern '.*' 491 492 It then compiles the regex and stores it in the opcode, for 493 later use by iq2000_cgen_assemble_insn 494 495 Returns NULL for success, an error message for failure. */ 496 497 char * 498 iq2000_cgen_build_insn_regex (CGEN_INSN *insn) 499 { 500 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn); 501 const char *mnem = CGEN_INSN_MNEMONIC (insn); 502 char rxbuf[CGEN_MAX_RX_ELEMENTS]; 503 char *rx = rxbuf; 504 const CGEN_SYNTAX_CHAR_TYPE *syn; 505 int reg_err; 506 507 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc)); 508 509 /* Mnemonics come first in the syntax string. */ 510 if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) 511 return _("missing mnemonic in syntax string"); 512 ++syn; 513 514 /* Generate a case sensitive regular expression that emulates case 515 insensitive matching in the "C" locale. We cannot generate a case 516 insensitive regular expression because in Turkish locales, 'i' and 'I' 517 are not equal modulo case conversion. */ 518 519 /* Copy the literal mnemonic out of the insn. */ 520 for (; *mnem; mnem++) 521 { 522 char c = *mnem; 523 524 if (ISALPHA (c)) 525 { 526 *rx++ = '['; 527 *rx++ = TOLOWER (c); 528 *rx++ = TOUPPER (c); 529 *rx++ = ']'; 530 } 531 else 532 *rx++ = c; 533 } 534 535 /* Copy any remaining literals from the syntax string into the rx. */ 536 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn) 537 { 538 if (CGEN_SYNTAX_CHAR_P (* syn)) 539 { 540 char c = CGEN_SYNTAX_CHAR (* syn); 541 542 switch (c) 543 { 544 /* Escape any regex metacharacters in the syntax. */ 545 case '.': case '[': case '\\': 546 case '*': case '^': case '$': 547 548 #ifdef CGEN_ESCAPE_EXTENDED_REGEX 549 case '?': case '{': case '}': 550 case '(': case ')': case '*': 551 case '|': case '+': case ']': 552 #endif 553 *rx++ = '\\'; 554 *rx++ = c; 555 break; 556 557 default: 558 if (ISALPHA (c)) 559 { 560 *rx++ = '['; 561 *rx++ = TOLOWER (c); 562 *rx++ = TOUPPER (c); 563 *rx++ = ']'; 564 } 565 else 566 *rx++ = c; 567 break; 568 } 569 } 570 else 571 { 572 /* Replace non-syntax fields with globs. */ 573 *rx++ = '.'; 574 *rx++ = '*'; 575 } 576 } 577 578 /* Trailing whitespace ok. */ 579 * rx++ = '['; 580 * rx++ = ' '; 581 * rx++ = '\t'; 582 * rx++ = ']'; 583 * rx++ = '*'; 584 585 /* But anchor it after that. */ 586 * rx++ = '$'; 587 * rx = '\0'; 588 589 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t)); 590 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB); 591 592 if (reg_err == 0) 593 return NULL; 594 else 595 { 596 static char msg[80]; 597 598 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80); 599 regfree ((regex_t *) CGEN_INSN_RX (insn)); 600 free (CGEN_INSN_RX (insn)); 601 (CGEN_INSN_RX (insn)) = NULL; 602 return msg; 603 } 604 } 605 606 607 /* Default insn parser. 609 610 The syntax string is scanned and operands are parsed and stored in FIELDS. 611 Relocs are queued as we go via other callbacks. 612 613 ??? Note that this is currently an all-or-nothing parser. If we fail to 614 parse the instruction, we return 0 and the caller will start over from 615 the beginning. Backtracking will be necessary in parsing subexpressions, 616 but that can be handled there. Not handling backtracking here may get 617 expensive in the case of the m68k. Deal with later. 618 619 Returns NULL for success, an error message for failure. */ 620 621 static const char * 622 parse_insn_normal (CGEN_CPU_DESC cd, 623 const CGEN_INSN *insn, 624 const char **strp, 625 CGEN_FIELDS *fields) 626 { 627 /* ??? Runtime added insns not handled yet. */ 628 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); 629 const char *str = *strp; 630 const char *errmsg; 631 const char *p; 632 const CGEN_SYNTAX_CHAR_TYPE * syn; 633 #ifdef CGEN_MNEMONIC_OPERANDS 634 /* FIXME: wip */ 635 int past_opcode_p; 636 #endif 637 638 /* For now we assume the mnemonic is first (there are no leading operands). 639 We can parse it without needing to set up operand parsing. 640 GAS's input scrubber will ensure mnemonics are lowercase, but we may 641 not be called from GAS. */ 642 p = CGEN_INSN_MNEMONIC (insn); 643 while (*p && TOLOWER (*p) == TOLOWER (*str)) 644 ++p, ++str; 645 646 if (* p) 647 return _("unrecognized instruction"); 648 649 #ifndef CGEN_MNEMONIC_OPERANDS 650 if (* str && ! ISSPACE (* str)) 651 return _("unrecognized instruction"); 652 #endif 653 654 CGEN_INIT_PARSE (cd); 655 cgen_init_parse_operand (cd); 656 #ifdef CGEN_MNEMONIC_OPERANDS 657 past_opcode_p = 0; 658 #endif 659 660 /* We don't check for (*str != '\0') here because we want to parse 661 any trailing fake arguments in the syntax string. */ 662 syn = CGEN_SYNTAX_STRING (syntax); 663 664 /* Mnemonics come first for now, ensure valid string. */ 665 if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) 666 abort (); 667 668 ++syn; 669 670 while (* syn != 0) 671 { 672 /* Non operand chars must match exactly. */ 673 if (CGEN_SYNTAX_CHAR_P (* syn)) 674 { 675 /* FIXME: While we allow for non-GAS callers above, we assume the 676 first char after the mnemonic part is a space. */ 677 /* FIXME: We also take inappropriate advantage of the fact that 678 GAS's input scrubber will remove extraneous blanks. */ 679 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn))) 680 { 681 #ifdef CGEN_MNEMONIC_OPERANDS 682 if (CGEN_SYNTAX_CHAR(* syn) == ' ') 683 past_opcode_p = 1; 684 #endif 685 ++ syn; 686 ++ str; 687 } 688 else if (*str) 689 { 690 /* Syntax char didn't match. Can't be this insn. */ 691 static char msg [80]; 692 693 /* xgettext:c-format */ 694 sprintf (msg, _("syntax error (expected char `%c', found `%c')"), 695 CGEN_SYNTAX_CHAR(*syn), *str); 696 return msg; 697 } 698 else 699 { 700 /* Ran out of input. */ 701 static char msg [80]; 702 703 /* xgettext:c-format */ 704 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"), 705 CGEN_SYNTAX_CHAR(*syn)); 706 return msg; 707 } 708 continue; 709 } 710 711 #ifdef CGEN_MNEMONIC_OPERANDS 712 (void) past_opcode_p; 713 #endif 714 /* We have an operand of some sort. */ 715 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields); 716 if (errmsg) 717 return errmsg; 718 719 /* Done with this operand, continue with next one. */ 720 ++ syn; 721 } 722 723 /* If we're at the end of the syntax string, we're done. */ 724 if (* syn == 0) 725 { 726 /* FIXME: For the moment we assume a valid `str' can only contain 727 blanks now. IE: We needn't try again with a longer version of 728 the insn and it is assumed that longer versions of insns appear 729 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ 730 while (ISSPACE (* str)) 731 ++ str; 732 733 if (* str != '\0') 734 return _("junk at end of line"); /* FIXME: would like to include `str' */ 735 736 return NULL; 737 } 738 739 /* We couldn't parse it. */ 740 return _("unrecognized instruction"); 741 } 742 743 /* Main entry point. 745 This routine is called for each instruction to be assembled. 746 STR points to the insn to be assembled. 747 We assume all necessary tables have been initialized. 748 The assembled instruction, less any fixups, is stored in BUF. 749 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value 750 still needs to be converted to target byte order, otherwise BUF is an array 751 of bytes in target byte order. 752 The result is a pointer to the insn's entry in the opcode table, 753 or NULL if an error occured (an error message will have already been 754 printed). 755 756 Note that when processing (non-alias) macro-insns, 757 this function recurses. 758 759 ??? It's possible to make this cpu-independent. 760 One would have to deal with a few minor things. 761 At this point in time doing so would be more of a curiosity than useful 762 [for example this file isn't _that_ big], but keeping the possibility in 763 mind helps keep the design clean. */ 764 765 const CGEN_INSN * 766 iq2000_cgen_assemble_insn (CGEN_CPU_DESC cd, 767 const char *str, 768 CGEN_FIELDS *fields, 769 CGEN_INSN_BYTES_PTR buf, 770 char **errmsg) 771 { 772 const char *start; 773 CGEN_INSN_LIST *ilist; 774 const char *parse_errmsg = NULL; 775 const char *insert_errmsg = NULL; 776 int recognized_mnemonic = 0; 777 778 /* Skip leading white space. */ 779 while (ISSPACE (* str)) 780 ++ str; 781 782 /* The instructions are stored in hashed lists. 783 Get the first in the list. */ 784 ilist = CGEN_ASM_LOOKUP_INSN (cd, str); 785 786 /* Keep looking until we find a match. */ 787 start = str; 788 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist)) 789 { 790 const CGEN_INSN *insn = ilist->insn; 791 recognized_mnemonic = 1; 792 793 #ifdef CGEN_VALIDATE_INSN_SUPPORTED 794 /* Not usually needed as unsupported opcodes 795 shouldn't be in the hash lists. */ 796 /* Is this insn supported by the selected cpu? */ 797 if (! iq2000_cgen_insn_supported (cd, insn)) 798 continue; 799 #endif 800 /* If the RELAXED attribute is set, this is an insn that shouldn't be 801 chosen immediately. Instead, it is used during assembler/linker 802 relaxation if possible. */ 803 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0) 804 continue; 805 806 str = start; 807 808 /* Skip this insn if str doesn't look right lexically. */ 809 if (CGEN_INSN_RX (insn) != NULL && 810 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH) 811 continue; 812 813 /* Allow parse/insert handlers to obtain length of insn. */ 814 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); 815 816 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields); 817 if (parse_errmsg != NULL) 818 continue; 819 820 /* ??? 0 is passed for `pc'. */ 821 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf, 822 (bfd_vma) 0); 823 if (insert_errmsg != NULL) 824 continue; 825 826 /* It is up to the caller to actually output the insn and any 827 queued relocs. */ 828 return insn; 829 } 830 831 { 832 static char errbuf[150]; 833 const char *tmp_errmsg; 834 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS 835 #define be_verbose 1 836 #else 837 #define be_verbose 0 838 #endif 839 840 if (be_verbose) 841 { 842 /* If requesting verbose error messages, use insert_errmsg. 843 Failing that, use parse_errmsg. */ 844 tmp_errmsg = (insert_errmsg ? insert_errmsg : 845 parse_errmsg ? parse_errmsg : 846 recognized_mnemonic ? 847 _("unrecognized form of instruction") : 848 _("unrecognized instruction")); 849 850 if (strlen (start) > 50) 851 /* xgettext:c-format */ 852 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start); 853 else 854 /* xgettext:c-format */ 855 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start); 856 } 857 else 858 { 859 if (strlen (start) > 50) 860 /* xgettext:c-format */ 861 sprintf (errbuf, _("bad instruction `%.50s...'"), start); 862 else 863 /* xgettext:c-format */ 864 sprintf (errbuf, _("bad instruction `%.50s'"), start); 865 } 866 867 *errmsg = errbuf; 868 return NULL; 869 } 870 } 871
