1 /* DO NOT EDIT! -*- buffer-read-only: t -*- vi:set ro: */ 2 /* Assembler interface for targets using CGEN. -*- C -*- 3 CGEN: Cpu tools GENerator 4 5 THIS FILE IS MACHINE GENERATED WITH CGEN. 6 - the resultant file is machine generated, cgen-asm.in isn't 7 8 Copyright (C) 1996-2025 Free Software Foundation, Inc. 9 10 This file is part of libopcodes. 11 12 This library is free software; you can redistribute it and/or modify 13 it under the terms of the GNU General Public License as published by 14 the Free Software Foundation; either version 3, or (at your option) 15 any later version. 16 17 It is distributed in the hope that it will be useful, but WITHOUT 18 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 19 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 20 License for more details. 21 22 You should have received a copy of the GNU General Public License 23 along with this program; if not, write to the Free Software Foundation, Inc., 24 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 25 26 27 /* ??? Eventually more and more of this stuff can go to cpu-independent files. 28 Keep that in mind. */ 29 30 #include "sysdep.h" 31 #include <stdio.h> 32 #include "ansidecl.h" 33 #include "bfd.h" 34 #include "symcat.h" 35 #include "epiphany-desc.h" 36 #include "epiphany-opc.h" 37 #include "opintl.h" 38 #include "xregex.h" 39 #include "libiberty.h" 40 #include "safe-ctype.h" 41 42 #undef min 43 #define min(a,b) ((a) < (b) ? (a) : (b)) 44 #undef max 45 #define max(a,b) ((a) > (b) ? (a) : (b)) 46 47 static const char * parse_insn_normal 48 (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *); 49 50 /* -- assembler routines inserted here. */ 52 53 /* -- asm.c */ 54 const char * 55 parse_shortregs (CGEN_CPU_DESC cd, 56 const char ** strp, 57 CGEN_KEYWORD * keywords, 58 long * regno) 59 { 60 const char * errmsg; 61 62 /* Parse register. */ 63 errmsg = cgen_parse_keyword (cd, strp, keywords, regno); 64 65 if (errmsg) 66 return errmsg; 67 68 if (*regno > 7) 69 errmsg = _("register unavailable for short instructions"); 70 71 return errmsg; 72 } 73 74 static const char * parse_simm_not_reg (CGEN_CPU_DESC, const char **, int, 75 long *); 76 77 static const char * 78 parse_uimm_not_reg (CGEN_CPU_DESC cd, 79 const char ** strp, 80 int opindex, 81 unsigned long * valuep) 82 { 83 long * svalp = (void *) valuep; 84 return parse_simm_not_reg (cd, strp, opindex, svalp); 85 } 86 87 /* Handle simm3/simm11/imm3/imm12. */ 88 89 static const char * 90 parse_simm_not_reg (CGEN_CPU_DESC cd, 91 const char ** strp, 92 int opindex, 93 long * valuep) 94 { 95 const char * errmsg; 96 97 int sign = 0; 98 int bits = 0; 99 100 switch (opindex) 101 { 102 case EPIPHANY_OPERAND_SIMM3: 103 sign = 1; bits = 3; break; 104 case EPIPHANY_OPERAND_SIMM11: 105 sign = 1; bits = 11; break; 106 case EPIPHANY_OPERAND_DISP3: 107 sign = 0; bits = 3; break; 108 case EPIPHANY_OPERAND_DISP11: 109 /* Load/store displacement is a sign-magnitude 12 bit value. */ 110 sign = 0; bits = 11; break; 111 } 112 113 /* First try to parse as a register name and reject the operand. */ 114 errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names,valuep); 115 if (!errmsg) 116 return _("register name used as immediate value"); 117 118 errmsg = (sign ? cgen_parse_signed_integer (cd, strp, opindex, valuep) 119 : cgen_parse_unsigned_integer (cd, strp, opindex, 120 (unsigned long *) valuep)); 121 if (errmsg) 122 return errmsg; 123 124 if (sign) 125 errmsg = cgen_validate_signed_integer (*valuep, 126 -((1L << bits) - 1), (1 << (bits - 1)) - 1); 127 else 128 errmsg = cgen_validate_unsigned_integer (*valuep, 0, (1L << bits) - 1); 129 130 return errmsg; 131 } 132 133 static const char * 134 parse_postindex (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 135 const char ** strp, 136 int opindex ATTRIBUTE_UNUSED, 137 unsigned long *valuep) 138 { 139 if (**strp == '#') 140 ++*strp; /* Skip leading hashes. */ 141 142 if (**strp == '-') 143 { 144 *valuep = 1; 145 ++*strp; 146 } 147 else if (**strp == '+') 148 { 149 *valuep = 0; 150 ++*strp; 151 } 152 else 153 *valuep = 0; 154 155 return NULL; 156 } 157 158 static const char * 159 parse_imm8 (CGEN_CPU_DESC cd, 160 const char ** strp, 161 int opindex, 162 bfd_reloc_code_real_type code, 163 enum cgen_parse_operand_result * result_type, 164 bfd_vma * valuep) 165 { 166 const char * errmsg; 167 enum cgen_parse_operand_result rt; 168 long dummyval; 169 170 if (!result_type) 171 result_type = &rt; 172 173 code = BFD_RELOC_NONE; 174 175 if (!cgen_parse_keyword (cd, strp, &epiphany_cgen_opval_gr_names, &dummyval) 176 || !cgen_parse_keyword (cd, strp, &epiphany_cgen_opval_cr_names, 177 &dummyval)) 178 /* Don't treat "mov ip,ip" as a move-immediate. */ 179 return _("register source in immediate move"); 180 181 errmsg = cgen_parse_address (cd, strp, opindex, code, result_type, valuep); 182 if (errmsg) 183 return errmsg; 184 185 if (*result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) 186 errmsg = cgen_validate_unsigned_integer (*valuep, 0, 0xff); 187 else 188 errmsg = _("byte relocation unsupported"); 189 190 *valuep &= 0xff; 191 return errmsg; 192 } 193 194 static const char * MISSING_CLOSE_PARENTHESIS = N_("missing `)'"); 195 196 static const char * 197 parse_imm16 (CGEN_CPU_DESC cd, 198 const char ** strp, 199 int opindex, 200 bfd_reloc_code_real_type code ATTRIBUTE_UNUSED, 201 enum cgen_parse_operand_result * result_type, 202 bfd_vma * valuep) 203 { 204 const char * errmsg; 205 enum cgen_parse_operand_result rt; 206 long dummyval; 207 208 if (!result_type) 209 result_type = &rt; 210 211 if (strncasecmp (*strp, "%high(", 6) == 0) 212 { 213 *strp += 6; 214 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_EPIPHANY_HIGH, 215 result_type, valuep); 216 if (**strp != ')') 217 return MISSING_CLOSE_PARENTHESIS; 218 ++*strp; 219 *valuep >>= 16; 220 } 221 else if (strncasecmp (*strp, "%low(", 5) == 0) 222 { 223 *strp += 5; 224 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_EPIPHANY_LOW, 225 result_type, valuep); 226 if (**strp != ')') 227 return MISSING_CLOSE_PARENTHESIS; 228 ++*strp; 229 } 230 else if (!cgen_parse_keyword (cd, strp, &epiphany_cgen_opval_gr_names, 231 &dummyval) 232 || !cgen_parse_keyword (cd, strp, &epiphany_cgen_opval_cr_names, 233 &dummyval)) 234 /* Don't treat "mov ip,ip" as a move-immediate. */ 235 return _("register source in immediate move"); 236 else 237 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_16, 238 result_type, valuep); 239 240 if (!errmsg && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) 241 errmsg = cgen_validate_unsigned_integer (*valuep, 0, 0xffff); 242 243 *valuep &= 0xffff; 244 return errmsg; 245 } 246 247 const char * 248 parse_branch_addr (CGEN_CPU_DESC cd, 249 const char ** strp, 250 int opindex, 251 int opinfo ATTRIBUTE_UNUSED, 252 enum cgen_parse_operand_result * resultp ATTRIBUTE_UNUSED, 253 bfd_vma *valuep ATTRIBUTE_UNUSED) 254 { 255 const char * errmsg; 256 enum cgen_parse_operand_result result_type; 257 bfd_reloc_code_real_type code = BFD_RELOC_NONE; 258 bfd_vma value; 259 260 switch (opindex) 261 { 262 case EPIPHANY_OPERAND_SIMM24: 263 code = BFD_RELOC_EPIPHANY_SIMM24; 264 break; 265 266 case EPIPHANY_OPERAND_SIMM8: 267 code = BFD_RELOC_EPIPHANY_SIMM8; 268 break; 269 270 default: 271 errmsg = _("ABORT: unknown operand"); 272 return errmsg; 273 } 274 275 errmsg = cgen_parse_address (cd, strp, opindex, code, 276 &result_type, &value); 277 if (errmsg == NULL) 278 { 279 if (result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) 280 { 281 /* Act as if we had done a PC-relative branch, ala .+num. */ 282 char buf[20]; 283 const char * bufp = (const char *) buf; 284 285 sprintf (buf, ".+%ld", (long) value); 286 errmsg = cgen_parse_address (cd, &bufp, opindex, code, &result_type, 287 &value); 288 } 289 290 if (result_type == CGEN_PARSE_OPERAND_RESULT_QUEUED) 291 { 292 /* This will happen for things like (s2-s1) where s2 and s1 293 are labels. */ 294 /* Nothing further to be done. */ 295 } 296 else 297 errmsg = _("Not a pc-relative address."); 298 } 299 return errmsg; 300 } 301 302 /* -- dis.c */ 304 305 const char * epiphany_cgen_parse_operand 306 (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *); 307 308 /* Main entry point for operand parsing. 309 310 This function is basically just a big switch statement. Earlier versions 311 used tables to look up the function to use, but 312 - if the table contains both assembler and disassembler functions then 313 the disassembler contains much of the assembler and vice-versa, 314 - there's a lot of inlining possibilities as things grow, 315 - using a switch statement avoids the function call overhead. 316 317 This function could be moved into `parse_insn_normal', but keeping it 318 separate makes clear the interface between `parse_insn_normal' and each of 319 the handlers. */ 320 321 const char * 322 epiphany_cgen_parse_operand (CGEN_CPU_DESC cd, 323 int opindex, 324 const char ** strp, 325 CGEN_FIELDS * fields) 326 { 327 const char * errmsg = NULL; 328 /* Used by scalar operands that still need to be parsed. */ 329 long junk ATTRIBUTE_UNUSED; 330 331 switch (opindex) 332 { 333 case EPIPHANY_OPERAND_DIRECTION : 334 errmsg = parse_postindex (cd, strp, EPIPHANY_OPERAND_DIRECTION, (unsigned long *) (& fields->f_addsubx)); 335 break; 336 case EPIPHANY_OPERAND_DISP11 : 337 errmsg = parse_uimm_not_reg (cd, strp, EPIPHANY_OPERAND_DISP11, (unsigned long *) (& fields->f_disp11)); 338 break; 339 case EPIPHANY_OPERAND_DISP3 : 340 errmsg = cgen_parse_unsigned_integer (cd, strp, EPIPHANY_OPERAND_DISP3, (unsigned long *) (& fields->f_disp3)); 341 break; 342 case EPIPHANY_OPERAND_DPMI : 343 errmsg = parse_postindex (cd, strp, EPIPHANY_OPERAND_DPMI, (unsigned long *) (& fields->f_subd)); 344 break; 345 case EPIPHANY_OPERAND_FRD : 346 errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rd); 347 break; 348 case EPIPHANY_OPERAND_FRD6 : 349 errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rd6); 350 break; 351 case EPIPHANY_OPERAND_FRM : 352 errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rm); 353 break; 354 case EPIPHANY_OPERAND_FRM6 : 355 errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rm6); 356 break; 357 case EPIPHANY_OPERAND_FRN : 358 errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rn); 359 break; 360 case EPIPHANY_OPERAND_FRN6 : 361 errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rn6); 362 break; 363 case EPIPHANY_OPERAND_IMM16 : 364 { 365 bfd_vma value = 0; 366 errmsg = parse_imm16 (cd, strp, EPIPHANY_OPERAND_IMM16, 0, NULL, & value); 367 fields->f_imm16 = value; 368 } 369 break; 370 case EPIPHANY_OPERAND_IMM8 : 371 { 372 bfd_vma value = 0; 373 errmsg = parse_imm8 (cd, strp, EPIPHANY_OPERAND_IMM8, 0, NULL, & value); 374 fields->f_imm8 = value; 375 } 376 break; 377 case EPIPHANY_OPERAND_RD : 378 errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rd); 379 break; 380 case EPIPHANY_OPERAND_RD6 : 381 errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rd6); 382 break; 383 case EPIPHANY_OPERAND_RM : 384 errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rm); 385 break; 386 case EPIPHANY_OPERAND_RM6 : 387 errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rm6); 388 break; 389 case EPIPHANY_OPERAND_RN : 390 errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rn); 391 break; 392 case EPIPHANY_OPERAND_RN6 : 393 errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rn6); 394 break; 395 case EPIPHANY_OPERAND_SD : 396 errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_cr_names, & fields->f_sd); 397 break; 398 case EPIPHANY_OPERAND_SD6 : 399 errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_cr_names, & fields->f_sd6); 400 break; 401 case EPIPHANY_OPERAND_SDDMA : 402 errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_crdma_names, & fields->f_sd6); 403 break; 404 case EPIPHANY_OPERAND_SDMEM : 405 errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_crmem_names, & fields->f_sd6); 406 break; 407 case EPIPHANY_OPERAND_SDMESH : 408 errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_crmesh_names, & fields->f_sd6); 409 break; 410 case EPIPHANY_OPERAND_SHIFT : 411 errmsg = cgen_parse_unsigned_integer (cd, strp, EPIPHANY_OPERAND_SHIFT, (unsigned long *) (& fields->f_shift)); 412 break; 413 case EPIPHANY_OPERAND_SIMM11 : 414 errmsg = parse_simm_not_reg (cd, strp, EPIPHANY_OPERAND_SIMM11, (long *) (& fields->f_sdisp11)); 415 break; 416 case EPIPHANY_OPERAND_SIMM24 : 417 { 418 bfd_vma value = 0; 419 errmsg = parse_branch_addr (cd, strp, EPIPHANY_OPERAND_SIMM24, 0, NULL, & value); 420 fields->f_simm24 = value; 421 } 422 break; 423 case EPIPHANY_OPERAND_SIMM3 : 424 errmsg = parse_simm_not_reg (cd, strp, EPIPHANY_OPERAND_SIMM3, (long *) (& fields->f_sdisp3)); 425 break; 426 case EPIPHANY_OPERAND_SIMM8 : 427 { 428 bfd_vma value = 0; 429 errmsg = parse_branch_addr (cd, strp, EPIPHANY_OPERAND_SIMM8, 0, NULL, & value); 430 fields->f_simm8 = value; 431 } 432 break; 433 case EPIPHANY_OPERAND_SN : 434 errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_cr_names, & fields->f_sn); 435 break; 436 case EPIPHANY_OPERAND_SN6 : 437 errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_cr_names, & fields->f_sn6); 438 break; 439 case EPIPHANY_OPERAND_SNDMA : 440 errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_crdma_names, & fields->f_sn6); 441 break; 442 case EPIPHANY_OPERAND_SNMEM : 443 errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_crmem_names, & fields->f_sn6); 444 break; 445 case EPIPHANY_OPERAND_SNMESH : 446 errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_crmesh_names, & fields->f_sn6); 447 break; 448 case EPIPHANY_OPERAND_SWI_NUM : 449 errmsg = parse_uimm_not_reg (cd, strp, EPIPHANY_OPERAND_SWI_NUM, (unsigned long *) (& fields->f_trap_num)); 450 break; 451 case EPIPHANY_OPERAND_TRAPNUM6 : 452 errmsg = cgen_parse_unsigned_integer (cd, strp, EPIPHANY_OPERAND_TRAPNUM6, (unsigned long *) (& fields->f_trap_num)); 453 break; 454 455 default : 456 /* xgettext:c-format */ 457 opcodes_error_handler 458 (_("internal error: unrecognized field %d while parsing"), 459 opindex); 460 abort (); 461 } 462 463 return errmsg; 464 } 465 466 cgen_parse_fn * const epiphany_cgen_parse_handlers[] = 467 { 468 parse_insn_normal, 469 }; 470 471 void 472 epiphany_cgen_init_asm (CGEN_CPU_DESC cd) 473 { 474 epiphany_cgen_init_opcode_table (cd); 475 epiphany_cgen_init_ibld_table (cd); 476 cd->parse_handlers = & epiphany_cgen_parse_handlers[0]; 477 cd->parse_operand = epiphany_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 epiphany_cgen_assemble_insn 494 495 Returns NULL for success, an error message for failure. */ 496 497 char * 498 epiphany_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 epiphany_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 (! epiphany_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
Indexes created Tue Feb 24 01:34:59 UTC 2026