| 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) 1996-2017 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 "lm32-desc.h" |
| 36 | #include "lm32-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 | \f |
| 50 | /* -- assembler routines inserted here. */ |
| 51 | |
| 52 | /* -- asm.c */ |
| 53 | |
| 54 | /* Handle signed/unsigned literal. */ |
| 55 | |
| 56 | static const char * |
| 57 | parse_imm (CGEN_CPU_DESC cd, |
| 58 | const char **strp, |
| 59 | int opindex, |
| 60 | unsigned long *valuep) |
| 61 | { |
| 62 | const char *errmsg; |
| 63 | signed long value; |
| 64 | |
| 65 | errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value); |
| 66 | if (errmsg == NULL) |
| 67 | { |
| 68 | unsigned long x = value & 0xFFFF0000; |
| 69 | if (x != 0 && x != 0xFFFF0000) |
| 70 | errmsg = _("immediate value out of range"); |
| 71 | else |
| 72 | *valuep = (value & 0xFFFF); |
| 73 | } |
| 74 | return errmsg; |
| 75 | } |
| 76 | |
| 77 | /* Handle hi() */ |
| 78 | |
| 79 | static const char * |
| 80 | parse_hi16 (CGEN_CPU_DESC cd, |
| 81 | const char **strp, |
| 82 | int opindex, |
| 83 | unsigned long *valuep) |
| 84 | { |
| 85 | if (strncasecmp (*strp, "hi(", 3) == 0) |
| 86 | { |
| 87 | enum cgen_parse_operand_result result_type; |
| 88 | bfd_vma value; |
| 89 | const char *errmsg; |
| 90 | |
| 91 | *strp += 3; |
| 92 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16, |
| 93 | &result_type, &value); |
| 94 | if (**strp != ')') |
| 95 | return _("missing `)'"); |
| 96 | |
| 97 | ++*strp; |
| 98 | if (errmsg == NULL |
| 99 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 100 | value = (value >> 16) & 0xffff; |
| 101 | *valuep = value; |
| 102 | |
| 103 | return errmsg; |
| 104 | } |
| 105 | |
| 106 | return parse_imm (cd, strp, opindex, valuep); |
| 107 | } |
| 108 | |
| 109 | /* Handle lo() */ |
| 110 | |
| 111 | static const char * |
| 112 | parse_lo16 (CGEN_CPU_DESC cd, |
| 113 | const char **strp, |
| 114 | int opindex, |
| 115 | unsigned long *valuep) |
| 116 | { |
| 117 | if (strncasecmp (*strp, "lo(", 3) == 0) |
| 118 | { |
| 119 | const char *errmsg; |
| 120 | enum cgen_parse_operand_result result_type; |
| 121 | bfd_vma value; |
| 122 | |
| 123 | *strp += 3; |
| 124 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16, |
| 125 | &result_type, &value); |
| 126 | if (**strp != ')') |
| 127 | return _("missing `)'"); |
| 128 | ++*strp; |
| 129 | if (errmsg == NULL |
| 130 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 131 | value &= 0xffff; |
| 132 | *valuep = value; |
| 133 | return errmsg; |
| 134 | } |
| 135 | |
| 136 | return parse_imm (cd, strp, opindex, valuep); |
| 137 | } |
| 138 | |
| 139 | /* Handle gp() */ |
| 140 | |
| 141 | static const char * |
| 142 | parse_gp16 (CGEN_CPU_DESC cd, |
| 143 | const char **strp, |
| 144 | int opindex, |
| 145 | long *valuep) |
| 146 | { |
| 147 | if (strncasecmp (*strp, "gp(", 3) == 0) |
| 148 | { |
| 149 | const char *errmsg; |
| 150 | enum cgen_parse_operand_result result_type; |
| 151 | bfd_vma value; |
| 152 | |
| 153 | *strp += 3; |
| 154 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_GPREL16, |
| 155 | & result_type, & value); |
| 156 | if (**strp != ')') |
| 157 | return _("missing `)'"); |
| 158 | ++*strp; |
| 159 | if (errmsg == NULL |
| 160 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 161 | value &= 0xffff; |
| 162 | *valuep = value; |
| 163 | return errmsg; |
| 164 | } |
| 165 | |
| 166 | return _("expecting gp relative address: gp(symbol)"); |
| 167 | } |
| 168 | |
| 169 | /* Handle got() */ |
| 170 | |
| 171 | static const char * |
| 172 | parse_got16 (CGEN_CPU_DESC cd, |
| 173 | const char **strp, |
| 174 | int opindex, |
| 175 | long *valuep) |
| 176 | { |
| 177 | if (strncasecmp (*strp, "got(", 4) == 0) |
| 178 | { |
| 179 | const char *errmsg; |
| 180 | enum cgen_parse_operand_result result_type; |
| 181 | bfd_vma value; |
| 182 | |
| 183 | *strp += 4; |
| 184 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LM32_16_GOT, |
| 185 | & result_type, & value); |
| 186 | if (**strp != ')') |
| 187 | return _("missing `)'"); |
| 188 | ++*strp; |
| 189 | if (errmsg == NULL |
| 190 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 191 | value &= 0xffff; |
| 192 | *valuep = value; |
| 193 | return errmsg; |
| 194 | } |
| 195 | |
| 196 | return _("expecting got relative address: got(symbol)"); |
| 197 | } |
| 198 | |
| 199 | /* Handle gotoffhi16() */ |
| 200 | |
| 201 | static const char * |
| 202 | parse_gotoff_hi16 (CGEN_CPU_DESC cd, |
| 203 | const char **strp, |
| 204 | int opindex, |
| 205 | long *valuep) |
| 206 | { |
| 207 | if (strncasecmp (*strp, "gotoffhi16(", 11) == 0) |
| 208 | { |
| 209 | const char *errmsg; |
| 210 | enum cgen_parse_operand_result result_type; |
| 211 | bfd_vma value; |
| 212 | |
| 213 | *strp += 11; |
| 214 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LM32_GOTOFF_HI16, |
| 215 | & result_type, & value); |
| 216 | if (**strp != ')') |
| 217 | return _("missing `)'"); |
| 218 | ++*strp; |
| 219 | if (errmsg == NULL |
| 220 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 221 | value &= 0xffff; |
| 222 | *valuep = value; |
| 223 | return errmsg; |
| 224 | } |
| 225 | |
| 226 | return _("expecting got relative address: gotoffhi16(symbol)"); |
| 227 | } |
| 228 | |
| 229 | /* Handle gotofflo16() */ |
| 230 | |
| 231 | static const char * |
| 232 | parse_gotoff_lo16 (CGEN_CPU_DESC cd, |
| 233 | const char **strp, |
| 234 | int opindex, |
| 235 | long *valuep) |
| 236 | { |
| 237 | if (strncasecmp (*strp, "gotofflo16(", 11) == 0) |
| 238 | { |
| 239 | const char *errmsg; |
| 240 | enum cgen_parse_operand_result result_type; |
| 241 | bfd_vma value; |
| 242 | |
| 243 | *strp += 11; |
| 244 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LM32_GOTOFF_LO16, |
| 245 | &result_type, &value); |
| 246 | if (**strp != ')') |
| 247 | return _("missing `)'"); |
| 248 | ++*strp; |
| 249 | if (errmsg == NULL |
| 250 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 251 | value &= 0xffff; |
| 252 | *valuep = value; |
| 253 | return errmsg; |
| 254 | } |
| 255 | |
| 256 | return _("expecting got relative address: gotofflo16(symbol)"); |
| 257 | } |
| 258 | |
| 259 | const char * lm32_cgen_parse_operand |
| 260 | (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *); |
| 261 | |
| 262 | /* Main entry point for operand parsing. |
| 263 | |
| 264 | This function is basically just a big switch statement. Earlier versions |
| 265 | used tables to look up the function to use, but |
| 266 | - if the table contains both assembler and disassembler functions then |
| 267 | the disassembler contains much of the assembler and vice-versa, |
| 268 | - there's a lot of inlining possibilities as things grow, |
| 269 | - using a switch statement avoids the function call overhead. |
| 270 | |
| 271 | This function could be moved into `parse_insn_normal', but keeping it |
| 272 | separate makes clear the interface between `parse_insn_normal' and each of |
| 273 | the handlers. */ |
| 274 | |
| 275 | const char * |
| 276 | lm32_cgen_parse_operand (CGEN_CPU_DESC cd, |
| 277 | int opindex, |
| 278 | const char ** strp, |
| 279 | CGEN_FIELDS * fields) |
| 280 | { |
| 281 | const char * errmsg = NULL; |
| 282 | /* Used by scalar operands that still need to be parsed. */ |
| 283 | long junk ATTRIBUTE_UNUSED; |
| 284 | |
| 285 | switch (opindex) |
| 286 | { |
| 287 | case LM32_OPERAND_BRANCH : |
| 288 | { |
| 289 | bfd_vma value = 0; |
| 290 | errmsg = cgen_parse_address (cd, strp, LM32_OPERAND_BRANCH, 0, NULL, & value); |
| 291 | fields->f_branch = value; |
| 292 | } |
| 293 | break; |
| 294 | case LM32_OPERAND_CALL : |
| 295 | { |
| 296 | bfd_vma value = 0; |
| 297 | errmsg = cgen_parse_address (cd, strp, LM32_OPERAND_CALL, 0, NULL, & value); |
| 298 | fields->f_call = value; |
| 299 | } |
| 300 | break; |
| 301 | case LM32_OPERAND_CSR : |
| 302 | errmsg = cgen_parse_keyword (cd, strp, & lm32_cgen_opval_h_csr, & fields->f_csr); |
| 303 | break; |
| 304 | case LM32_OPERAND_EXCEPTION : |
| 305 | errmsg = cgen_parse_unsigned_integer (cd, strp, LM32_OPERAND_EXCEPTION, (unsigned long *) (& fields->f_exception)); |
| 306 | break; |
| 307 | case LM32_OPERAND_GOT16 : |
| 308 | errmsg = parse_got16 (cd, strp, LM32_OPERAND_GOT16, (long *) (& fields->f_imm)); |
| 309 | break; |
| 310 | case LM32_OPERAND_GOTOFFHI16 : |
| 311 | errmsg = parse_gotoff_hi16 (cd, strp, LM32_OPERAND_GOTOFFHI16, (long *) (& fields->f_imm)); |
| 312 | break; |
| 313 | case LM32_OPERAND_GOTOFFLO16 : |
| 314 | errmsg = parse_gotoff_lo16 (cd, strp, LM32_OPERAND_GOTOFFLO16, (long *) (& fields->f_imm)); |
| 315 | break; |
| 316 | case LM32_OPERAND_GP16 : |
| 317 | errmsg = parse_gp16 (cd, strp, LM32_OPERAND_GP16, (long *) (& fields->f_imm)); |
| 318 | break; |
| 319 | case LM32_OPERAND_HI16 : |
| 320 | errmsg = parse_hi16 (cd, strp, LM32_OPERAND_HI16, (unsigned long *) (& fields->f_uimm)); |
| 321 | break; |
| 322 | case LM32_OPERAND_IMM : |
| 323 | errmsg = cgen_parse_signed_integer (cd, strp, LM32_OPERAND_IMM, (long *) (& fields->f_imm)); |
| 324 | break; |
| 325 | case LM32_OPERAND_LO16 : |
| 326 | errmsg = parse_lo16 (cd, strp, LM32_OPERAND_LO16, (unsigned long *) (& fields->f_uimm)); |
| 327 | break; |
| 328 | case LM32_OPERAND_R0 : |
| 329 | errmsg = cgen_parse_keyword (cd, strp, & lm32_cgen_opval_h_gr, & fields->f_r0); |
| 330 | break; |
| 331 | case LM32_OPERAND_R1 : |
| 332 | errmsg = cgen_parse_keyword (cd, strp, & lm32_cgen_opval_h_gr, & fields->f_r1); |
| 333 | break; |
| 334 | case LM32_OPERAND_R2 : |
| 335 | errmsg = cgen_parse_keyword (cd, strp, & lm32_cgen_opval_h_gr, & fields->f_r2); |
| 336 | break; |
| 337 | case LM32_OPERAND_SHIFT : |
| 338 | errmsg = cgen_parse_unsigned_integer (cd, strp, LM32_OPERAND_SHIFT, (unsigned long *) (& fields->f_shift)); |
| 339 | break; |
| 340 | case LM32_OPERAND_UIMM : |
| 341 | errmsg = cgen_parse_unsigned_integer (cd, strp, LM32_OPERAND_UIMM, (unsigned long *) (& fields->f_uimm)); |
| 342 | break; |
| 343 | case LM32_OPERAND_USER : |
| 344 | errmsg = cgen_parse_unsigned_integer (cd, strp, LM32_OPERAND_USER, (unsigned long *) (& fields->f_user)); |
| 345 | break; |
| 346 | |
| 347 | default : |
| 348 | /* xgettext:c-format */ |
| 349 | fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex); |
| 350 | abort (); |
| 351 | } |
| 352 | |
| 353 | return errmsg; |
| 354 | } |
| 355 | |
| 356 | cgen_parse_fn * const lm32_cgen_parse_handlers[] = |
| 357 | { |
| 358 | parse_insn_normal, |
| 359 | }; |
| 360 | |
| 361 | void |
| 362 | lm32_cgen_init_asm (CGEN_CPU_DESC cd) |
| 363 | { |
| 364 | lm32_cgen_init_opcode_table (cd); |
| 365 | lm32_cgen_init_ibld_table (cd); |
| 366 | cd->parse_handlers = & lm32_cgen_parse_handlers[0]; |
| 367 | cd->parse_operand = lm32_cgen_parse_operand; |
| 368 | #ifdef CGEN_ASM_INIT_HOOK |
| 369 | CGEN_ASM_INIT_HOOK |
| 370 | #endif |
| 371 | } |
| 372 | |
| 373 | \f |
| 374 | |
| 375 | /* Regex construction routine. |
| 376 | |
| 377 | This translates an opcode syntax string into a regex string, |
| 378 | by replacing any non-character syntax element (such as an |
| 379 | opcode) with the pattern '.*' |
| 380 | |
| 381 | It then compiles the regex and stores it in the opcode, for |
| 382 | later use by lm32_cgen_assemble_insn |
| 383 | |
| 384 | Returns NULL for success, an error message for failure. */ |
| 385 | |
| 386 | char * |
| 387 | lm32_cgen_build_insn_regex (CGEN_INSN *insn) |
| 388 | { |
| 389 | CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn); |
| 390 | const char *mnem = CGEN_INSN_MNEMONIC (insn); |
| 391 | char rxbuf[CGEN_MAX_RX_ELEMENTS]; |
| 392 | char *rx = rxbuf; |
| 393 | const CGEN_SYNTAX_CHAR_TYPE *syn; |
| 394 | int reg_err; |
| 395 | |
| 396 | syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc)); |
| 397 | |
| 398 | /* Mnemonics come first in the syntax string. */ |
| 399 | if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) |
| 400 | return _("missing mnemonic in syntax string"); |
| 401 | ++syn; |
| 402 | |
| 403 | /* Generate a case sensitive regular expression that emulates case |
| 404 | insensitive matching in the "C" locale. We cannot generate a case |
| 405 | insensitive regular expression because in Turkish locales, 'i' and 'I' |
| 406 | are not equal modulo case conversion. */ |
| 407 | |
| 408 | /* Copy the literal mnemonic out of the insn. */ |
| 409 | for (; *mnem; mnem++) |
| 410 | { |
| 411 | char c = *mnem; |
| 412 | |
| 413 | if (ISALPHA (c)) |
| 414 | { |
| 415 | *rx++ = '['; |
| 416 | *rx++ = TOLOWER (c); |
| 417 | *rx++ = TOUPPER (c); |
| 418 | *rx++ = ']'; |
| 419 | } |
| 420 | else |
| 421 | *rx++ = c; |
| 422 | } |
| 423 | |
| 424 | /* Copy any remaining literals from the syntax string into the rx. */ |
| 425 | for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn) |
| 426 | { |
| 427 | if (CGEN_SYNTAX_CHAR_P (* syn)) |
| 428 | { |
| 429 | char c = CGEN_SYNTAX_CHAR (* syn); |
| 430 | |
| 431 | switch (c) |
| 432 | { |
| 433 | /* Escape any regex metacharacters in the syntax. */ |
| 434 | case '.': case '[': case '\\': |
| 435 | case '*': case '^': case '$': |
| 436 | |
| 437 | #ifdef CGEN_ESCAPE_EXTENDED_REGEX |
| 438 | case '?': case '{': case '}': |
| 439 | case '(': case ')': case '*': |
| 440 | case '|': case '+': case ']': |
| 441 | #endif |
| 442 | *rx++ = '\\'; |
| 443 | *rx++ = c; |
| 444 | break; |
| 445 | |
| 446 | default: |
| 447 | if (ISALPHA (c)) |
| 448 | { |
| 449 | *rx++ = '['; |
| 450 | *rx++ = TOLOWER (c); |
| 451 | *rx++ = TOUPPER (c); |
| 452 | *rx++ = ']'; |
| 453 | } |
| 454 | else |
| 455 | *rx++ = c; |
| 456 | break; |
| 457 | } |
| 458 | } |
| 459 | else |
| 460 | { |
| 461 | /* Replace non-syntax fields with globs. */ |
| 462 | *rx++ = '.'; |
| 463 | *rx++ = '*'; |
| 464 | } |
| 465 | } |
| 466 | |
| 467 | /* Trailing whitespace ok. */ |
| 468 | * rx++ = '['; |
| 469 | * rx++ = ' '; |
| 470 | * rx++ = '\t'; |
| 471 | * rx++ = ']'; |
| 472 | * rx++ = '*'; |
| 473 | |
| 474 | /* But anchor it after that. */ |
| 475 | * rx++ = '$'; |
| 476 | * rx = '\0'; |
| 477 | |
| 478 | CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t)); |
| 479 | reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB); |
| 480 | |
| 481 | if (reg_err == 0) |
| 482 | return NULL; |
| 483 | else |
| 484 | { |
| 485 | static char msg[80]; |
| 486 | |
| 487 | regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80); |
| 488 | regfree ((regex_t *) CGEN_INSN_RX (insn)); |
| 489 | free (CGEN_INSN_RX (insn)); |
| 490 | (CGEN_INSN_RX (insn)) = NULL; |
| 491 | return msg; |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | \f |
| 496 | /* Default insn parser. |
| 497 | |
| 498 | The syntax string is scanned and operands are parsed and stored in FIELDS. |
| 499 | Relocs are queued as we go via other callbacks. |
| 500 | |
| 501 | ??? Note that this is currently an all-or-nothing parser. If we fail to |
| 502 | parse the instruction, we return 0 and the caller will start over from |
| 503 | the beginning. Backtracking will be necessary in parsing subexpressions, |
| 504 | but that can be handled there. Not handling backtracking here may get |
| 505 | expensive in the case of the m68k. Deal with later. |
| 506 | |
| 507 | Returns NULL for success, an error message for failure. */ |
| 508 | |
| 509 | static const char * |
| 510 | parse_insn_normal (CGEN_CPU_DESC cd, |
| 511 | const CGEN_INSN *insn, |
| 512 | const char **strp, |
| 513 | CGEN_FIELDS *fields) |
| 514 | { |
| 515 | /* ??? Runtime added insns not handled yet. */ |
| 516 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); |
| 517 | const char *str = *strp; |
| 518 | const char *errmsg; |
| 519 | const char *p; |
| 520 | const CGEN_SYNTAX_CHAR_TYPE * syn; |
| 521 | #ifdef CGEN_MNEMONIC_OPERANDS |
| 522 | /* FIXME: wip */ |
| 523 | int past_opcode_p; |
| 524 | #endif |
| 525 | |
| 526 | /* For now we assume the mnemonic is first (there are no leading operands). |
| 527 | We can parse it without needing to set up operand parsing. |
| 528 | GAS's input scrubber will ensure mnemonics are lowercase, but we may |
| 529 | not be called from GAS. */ |
| 530 | p = CGEN_INSN_MNEMONIC (insn); |
| 531 | while (*p && TOLOWER (*p) == TOLOWER (*str)) |
| 532 | ++p, ++str; |
| 533 | |
| 534 | if (* p) |
| 535 | return _("unrecognized instruction"); |
| 536 | |
| 537 | #ifndef CGEN_MNEMONIC_OPERANDS |
| 538 | if (* str && ! ISSPACE (* str)) |
| 539 | return _("unrecognized instruction"); |
| 540 | #endif |
| 541 | |
| 542 | CGEN_INIT_PARSE (cd); |
| 543 | cgen_init_parse_operand (cd); |
| 544 | #ifdef CGEN_MNEMONIC_OPERANDS |
| 545 | past_opcode_p = 0; |
| 546 | #endif |
| 547 | |
| 548 | /* We don't check for (*str != '\0') here because we want to parse |
| 549 | any trailing fake arguments in the syntax string. */ |
| 550 | syn = CGEN_SYNTAX_STRING (syntax); |
| 551 | |
| 552 | /* Mnemonics come first for now, ensure valid string. */ |
| 553 | if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) |
| 554 | abort (); |
| 555 | |
| 556 | ++syn; |
| 557 | |
| 558 | while (* syn != 0) |
| 559 | { |
| 560 | /* Non operand chars must match exactly. */ |
| 561 | if (CGEN_SYNTAX_CHAR_P (* syn)) |
| 562 | { |
| 563 | /* FIXME: While we allow for non-GAS callers above, we assume the |
| 564 | first char after the mnemonic part is a space. */ |
| 565 | /* FIXME: We also take inappropriate advantage of the fact that |
| 566 | GAS's input scrubber will remove extraneous blanks. */ |
| 567 | if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn))) |
| 568 | { |
| 569 | #ifdef CGEN_MNEMONIC_OPERANDS |
| 570 | if (CGEN_SYNTAX_CHAR(* syn) == ' ') |
| 571 | past_opcode_p = 1; |
| 572 | #endif |
| 573 | ++ syn; |
| 574 | ++ str; |
| 575 | } |
| 576 | else if (*str) |
| 577 | { |
| 578 | /* Syntax char didn't match. Can't be this insn. */ |
| 579 | static char msg [80]; |
| 580 | |
| 581 | /* xgettext:c-format */ |
| 582 | sprintf (msg, _("syntax error (expected char `%c', found `%c')"), |
| 583 | CGEN_SYNTAX_CHAR(*syn), *str); |
| 584 | return msg; |
| 585 | } |
| 586 | else |
| 587 | { |
| 588 | /* Ran out of input. */ |
| 589 | static char msg [80]; |
| 590 | |
| 591 | /* xgettext:c-format */ |
| 592 | sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"), |
| 593 | CGEN_SYNTAX_CHAR(*syn)); |
| 594 | return msg; |
| 595 | } |
| 596 | continue; |
| 597 | } |
| 598 | |
| 599 | #ifdef CGEN_MNEMONIC_OPERANDS |
| 600 | (void) past_opcode_p; |
| 601 | #endif |
| 602 | /* We have an operand of some sort. */ |
| 603 | errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields); |
| 604 | if (errmsg) |
| 605 | return errmsg; |
| 606 | |
| 607 | /* Done with this operand, continue with next one. */ |
| 608 | ++ syn; |
| 609 | } |
| 610 | |
| 611 | /* If we're at the end of the syntax string, we're done. */ |
| 612 | if (* syn == 0) |
| 613 | { |
| 614 | /* FIXME: For the moment we assume a valid `str' can only contain |
| 615 | blanks now. IE: We needn't try again with a longer version of |
| 616 | the insn and it is assumed that longer versions of insns appear |
| 617 | before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ |
| 618 | while (ISSPACE (* str)) |
| 619 | ++ str; |
| 620 | |
| 621 | if (* str != '\0') |
| 622 | return _("junk at end of line"); /* FIXME: would like to include `str' */ |
| 623 | |
| 624 | return NULL; |
| 625 | } |
| 626 | |
| 627 | /* We couldn't parse it. */ |
| 628 | return _("unrecognized instruction"); |
| 629 | } |
| 630 | \f |
| 631 | /* Main entry point. |
| 632 | This routine is called for each instruction to be assembled. |
| 633 | STR points to the insn to be assembled. |
| 634 | We assume all necessary tables have been initialized. |
| 635 | The assembled instruction, less any fixups, is stored in BUF. |
| 636 | Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value |
| 637 | still needs to be converted to target byte order, otherwise BUF is an array |
| 638 | of bytes in target byte order. |
| 639 | The result is a pointer to the insn's entry in the opcode table, |
| 640 | or NULL if an error occured (an error message will have already been |
| 641 | printed). |
| 642 | |
| 643 | Note that when processing (non-alias) macro-insns, |
| 644 | this function recurses. |
| 645 | |
| 646 | ??? It's possible to make this cpu-independent. |
| 647 | One would have to deal with a few minor things. |
| 648 | At this point in time doing so would be more of a curiosity than useful |
| 649 | [for example this file isn't _that_ big], but keeping the possibility in |
| 650 | mind helps keep the design clean. */ |
| 651 | |
| 652 | const CGEN_INSN * |
| 653 | lm32_cgen_assemble_insn (CGEN_CPU_DESC cd, |
| 654 | const char *str, |
| 655 | CGEN_FIELDS *fields, |
| 656 | CGEN_INSN_BYTES_PTR buf, |
| 657 | char **errmsg) |
| 658 | { |
| 659 | const char *start; |
| 660 | CGEN_INSN_LIST *ilist; |
| 661 | const char *parse_errmsg = NULL; |
| 662 | const char *insert_errmsg = NULL; |
| 663 | int recognized_mnemonic = 0; |
| 664 | |
| 665 | /* Skip leading white space. */ |
| 666 | while (ISSPACE (* str)) |
| 667 | ++ str; |
| 668 | |
| 669 | /* The instructions are stored in hashed lists. |
| 670 | Get the first in the list. */ |
| 671 | ilist = CGEN_ASM_LOOKUP_INSN (cd, str); |
| 672 | |
| 673 | /* Keep looking until we find a match. */ |
| 674 | start = str; |
| 675 | for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist)) |
| 676 | { |
| 677 | const CGEN_INSN *insn = ilist->insn; |
| 678 | recognized_mnemonic = 1; |
| 679 | |
| 680 | #ifdef CGEN_VALIDATE_INSN_SUPPORTED |
| 681 | /* Not usually needed as unsupported opcodes |
| 682 | shouldn't be in the hash lists. */ |
| 683 | /* Is this insn supported by the selected cpu? */ |
| 684 | if (! lm32_cgen_insn_supported (cd, insn)) |
| 685 | continue; |
| 686 | #endif |
| 687 | /* If the RELAXED attribute is set, this is an insn that shouldn't be |
| 688 | chosen immediately. Instead, it is used during assembler/linker |
| 689 | relaxation if possible. */ |
| 690 | if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0) |
| 691 | continue; |
| 692 | |
| 693 | str = start; |
| 694 | |
| 695 | /* Skip this insn if str doesn't look right lexically. */ |
| 696 | if (CGEN_INSN_RX (insn) != NULL && |
| 697 | regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH) |
| 698 | continue; |
| 699 | |
| 700 | /* Allow parse/insert handlers to obtain length of insn. */ |
| 701 | CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); |
| 702 | |
| 703 | parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields); |
| 704 | if (parse_errmsg != NULL) |
| 705 | continue; |
| 706 | |
| 707 | /* ??? 0 is passed for `pc'. */ |
| 708 | insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf, |
| 709 | (bfd_vma) 0); |
| 710 | if (insert_errmsg != NULL) |
| 711 | continue; |
| 712 | |
| 713 | /* It is up to the caller to actually output the insn and any |
| 714 | queued relocs. */ |
| 715 | return insn; |
| 716 | } |
| 717 | |
| 718 | { |
| 719 | static char errbuf[150]; |
| 720 | const char *tmp_errmsg; |
| 721 | #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS |
| 722 | #define be_verbose 1 |
| 723 | #else |
| 724 | #define be_verbose 0 |
| 725 | #endif |
| 726 | |
| 727 | if (be_verbose) |
| 728 | { |
| 729 | /* If requesting verbose error messages, use insert_errmsg. |
| 730 | Failing that, use parse_errmsg. */ |
| 731 | tmp_errmsg = (insert_errmsg ? insert_errmsg : |
| 732 | parse_errmsg ? parse_errmsg : |
| 733 | recognized_mnemonic ? |
| 734 | _("unrecognized form of instruction") : |
| 735 | _("unrecognized instruction")); |
| 736 | |
| 737 | if (strlen (start) > 50) |
| 738 | /* xgettext:c-format */ |
| 739 | sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start); |
| 740 | else |
| 741 | /* xgettext:c-format */ |
| 742 | sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start); |
| 743 | } |
| 744 | else |
| 745 | { |
| 746 | if (strlen (start) > 50) |
| 747 | /* xgettext:c-format */ |
| 748 | sprintf (errbuf, _("bad instruction `%.50s...'"), start); |
| 749 | else |
| 750 | /* xgettext:c-format */ |
| 751 | sprintf (errbuf, _("bad instruction `%.50s'"), start); |
| 752 | } |
| 753 | |
| 754 | *errmsg = errbuf; |
| 755 | return NULL; |
| 756 | } |
| 757 | } |