| 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) 1996-2019 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 | \f |
| 50 | /* -- assembler routines inserted here. */ |
| 51 | |
| 52 | /* -- asm.c */ |
| 53 | const char * |
| 54 | parse_shortregs (CGEN_CPU_DESC cd, |
| 55 | const char ** strp, |
| 56 | CGEN_KEYWORD * keywords, |
| 57 | long * regno) |
| 58 | { |
| 59 | const char * errmsg; |
| 60 | |
| 61 | /* Parse register. */ |
| 62 | errmsg = cgen_parse_keyword (cd, strp, keywords, regno); |
| 63 | |
| 64 | if (errmsg) |
| 65 | return errmsg; |
| 66 | |
| 67 | if (*regno > 7) |
| 68 | errmsg = _("register unavailable for short instructions"); |
| 69 | |
| 70 | return errmsg; |
| 71 | } |
| 72 | |
| 73 | static const char * parse_simm_not_reg (CGEN_CPU_DESC, const char **, int, |
| 74 | long *); |
| 75 | |
| 76 | static const char * |
| 77 | parse_uimm_not_reg (CGEN_CPU_DESC cd, |
| 78 | const char ** strp, |
| 79 | int opindex, |
| 80 | unsigned long * valuep) |
| 81 | { |
| 82 | long * svalp = (void *) valuep; |
| 83 | return parse_simm_not_reg (cd, strp, opindex, svalp); |
| 84 | } |
| 85 | |
| 86 | /* Handle simm3/simm11/imm3/imm12. */ |
| 87 | |
| 88 | static const char * |
| 89 | parse_simm_not_reg (CGEN_CPU_DESC cd, |
| 90 | const char ** strp, |
| 91 | int opindex, |
| 92 | long * valuep) |
| 93 | { |
| 94 | const char * errmsg; |
| 95 | |
| 96 | int sign = 0; |
| 97 | int bits = 0; |
| 98 | |
| 99 | switch (opindex) |
| 100 | { |
| 101 | case EPIPHANY_OPERAND_SIMM3: |
| 102 | sign = 1; bits = 3; break; |
| 103 | case EPIPHANY_OPERAND_SIMM11: |
| 104 | sign = 1; bits = 11; break; |
| 105 | case EPIPHANY_OPERAND_DISP3: |
| 106 | sign = 0; bits = 3; break; |
| 107 | case EPIPHANY_OPERAND_DISP11: |
| 108 | /* Load/store displacement is a sign-magnitude 12 bit value. */ |
| 109 | sign = 0; bits = 11; break; |
| 110 | } |
| 111 | |
| 112 | /* First try to parse as a register name and reject the operand. */ |
| 113 | errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names,valuep); |
| 114 | if (!errmsg) |
| 115 | return _("register name used as immediate value"); |
| 116 | |
| 117 | errmsg = (sign ? cgen_parse_signed_integer (cd, strp, opindex, valuep) |
| 118 | : cgen_parse_unsigned_integer (cd, strp, opindex, |
| 119 | (unsigned long *) valuep)); |
| 120 | if (errmsg) |
| 121 | return errmsg; |
| 122 | |
| 123 | if (sign) |
| 124 | errmsg = cgen_validate_signed_integer (*valuep, |
| 125 | -((1L << bits) - 1), (1 << (bits - 1)) - 1); |
| 126 | else |
| 127 | errmsg = cgen_validate_unsigned_integer (*valuep, 0, (1L << bits) - 1); |
| 128 | |
| 129 | return errmsg; |
| 130 | } |
| 131 | |
| 132 | static const char * |
| 133 | parse_postindex (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, |
| 134 | const char ** strp, |
| 135 | int opindex ATTRIBUTE_UNUSED, |
| 136 | unsigned long *valuep) |
| 137 | { |
| 138 | if (**strp == '#') |
| 139 | ++*strp; /* Skip leading hashes. */ |
| 140 | |
| 141 | if (**strp == '-') |
| 142 | { |
| 143 | *valuep = 1; |
| 144 | ++*strp; |
| 145 | } |
| 146 | else if (**strp == '+') |
| 147 | { |
| 148 | *valuep = 0; |
| 149 | ++*strp; |
| 150 | } |
| 151 | else |
| 152 | *valuep = 0; |
| 153 | |
| 154 | return NULL; |
| 155 | } |
| 156 | |
| 157 | static const char * |
| 158 | parse_imm8 (CGEN_CPU_DESC cd, |
| 159 | const char ** strp, |
| 160 | int opindex, |
| 161 | bfd_reloc_code_real_type code, |
| 162 | enum cgen_parse_operand_result * result_type, |
| 163 | bfd_vma * valuep) |
| 164 | { |
| 165 | const char * errmsg; |
| 166 | enum cgen_parse_operand_result rt; |
| 167 | long dummyval; |
| 168 | |
| 169 | if (!result_type) |
| 170 | result_type = &rt; |
| 171 | |
| 172 | code = BFD_RELOC_NONE; |
| 173 | |
| 174 | if (!cgen_parse_keyword (cd, strp, &epiphany_cgen_opval_gr_names, &dummyval) |
| 175 | || !cgen_parse_keyword (cd, strp, &epiphany_cgen_opval_cr_names, |
| 176 | &dummyval)) |
| 177 | /* Don't treat "mov ip,ip" as a move-immediate. */ |
| 178 | return _("register source in immediate move"); |
| 179 | |
| 180 | errmsg = cgen_parse_address (cd, strp, opindex, code, result_type, valuep); |
| 181 | if (errmsg) |
| 182 | return errmsg; |
| 183 | |
| 184 | if (*result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 185 | errmsg = cgen_validate_unsigned_integer (*valuep, 0, 0xff); |
| 186 | else |
| 187 | errmsg = _("byte relocation unsupported"); |
| 188 | |
| 189 | *valuep &= 0xff; |
| 190 | return errmsg; |
| 191 | } |
| 192 | |
| 193 | static const char * MISSING_CLOSE_PARENTHESIS = N_("missing `)'"); |
| 194 | |
| 195 | static const char * |
| 196 | parse_imm16 (CGEN_CPU_DESC cd, |
| 197 | const char ** strp, |
| 198 | int opindex, |
| 199 | bfd_reloc_code_real_type code ATTRIBUTE_UNUSED, |
| 200 | enum cgen_parse_operand_result * result_type, |
| 201 | bfd_vma * valuep) |
| 202 | { |
| 203 | const char * errmsg; |
| 204 | enum cgen_parse_operand_result rt; |
| 205 | long dummyval; |
| 206 | |
| 207 | if (!result_type) |
| 208 | result_type = &rt; |
| 209 | |
| 210 | if (strncasecmp (*strp, "%high(", 6) == 0) |
| 211 | { |
| 212 | *strp += 6; |
| 213 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_EPIPHANY_HIGH, |
| 214 | result_type, valuep); |
| 215 | if (**strp != ')') |
| 216 | return MISSING_CLOSE_PARENTHESIS; |
| 217 | ++*strp; |
| 218 | *valuep >>= 16; |
| 219 | } |
| 220 | else if (strncasecmp (*strp, "%low(", 5) == 0) |
| 221 | { |
| 222 | *strp += 5; |
| 223 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_EPIPHANY_LOW, |
| 224 | result_type, valuep); |
| 225 | if (**strp != ')') |
| 226 | return MISSING_CLOSE_PARENTHESIS; |
| 227 | ++*strp; |
| 228 | } |
| 229 | else if (!cgen_parse_keyword (cd, strp, &epiphany_cgen_opval_gr_names, |
| 230 | &dummyval) |
| 231 | || !cgen_parse_keyword (cd, strp, &epiphany_cgen_opval_cr_names, |
| 232 | &dummyval)) |
| 233 | /* Don't treat "mov ip,ip" as a move-immediate. */ |
| 234 | return _("register source in immediate move"); |
| 235 | else |
| 236 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_16, |
| 237 | result_type, valuep); |
| 238 | |
| 239 | if (!errmsg && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 240 | errmsg = cgen_validate_unsigned_integer (*valuep, 0, 0xffff); |
| 241 | |
| 242 | *valuep &= 0xffff; |
| 243 | return errmsg; |
| 244 | } |
| 245 | |
| 246 | const char * |
| 247 | parse_branch_addr (CGEN_CPU_DESC cd, |
| 248 | const char ** strp, |
| 249 | int opindex, |
| 250 | int opinfo ATTRIBUTE_UNUSED, |
| 251 | enum cgen_parse_operand_result * resultp ATTRIBUTE_UNUSED, |
| 252 | bfd_vma *valuep ATTRIBUTE_UNUSED) |
| 253 | { |
| 254 | const char * errmsg; |
| 255 | enum cgen_parse_operand_result result_type; |
| 256 | bfd_reloc_code_real_type code = BFD_RELOC_NONE; |
| 257 | bfd_vma value; |
| 258 | |
| 259 | switch (opindex) |
| 260 | { |
| 261 | case EPIPHANY_OPERAND_SIMM24: |
| 262 | code = BFD_RELOC_EPIPHANY_SIMM24; |
| 263 | break; |
| 264 | |
| 265 | case EPIPHANY_OPERAND_SIMM8: |
| 266 | code = BFD_RELOC_EPIPHANY_SIMM8; |
| 267 | break; |
| 268 | |
| 269 | default: |
| 270 | errmsg = _("ABORT: unknown operand"); |
| 271 | return errmsg; |
| 272 | } |
| 273 | |
| 274 | errmsg = cgen_parse_address (cd, strp, opindex, code, |
| 275 | &result_type, &value); |
| 276 | if (errmsg == NULL) |
| 277 | { |
| 278 | if (result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 279 | { |
| 280 | /* Act as if we had done a PC-relative branch, ala .+num. */ |
| 281 | char buf[20]; |
| 282 | const char * bufp = (const char *) buf; |
| 283 | |
| 284 | sprintf (buf, ".+%ld", (long) value); |
| 285 | errmsg = cgen_parse_address (cd, &bufp, opindex, code, &result_type, |
| 286 | &value); |
| 287 | } |
| 288 | |
| 289 | if (result_type == CGEN_PARSE_OPERAND_RESULT_QUEUED) |
| 290 | { |
| 291 | /* This will happen for things like (s2-s1) where s2 and s1 |
| 292 | are labels. */ |
| 293 | /* Nothing further to be done. */ |
| 294 | } |
| 295 | else |
| 296 | errmsg = _("Not a pc-relative address."); |
| 297 | } |
| 298 | return errmsg; |
| 299 | } |
| 300 | \f |
| 301 | /* -- dis.c */ |
| 302 | |
| 303 | const char * epiphany_cgen_parse_operand |
| 304 | (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *); |
| 305 | |
| 306 | /* Main entry point for operand parsing. |
| 307 | |
| 308 | This function is basically just a big switch statement. Earlier versions |
| 309 | used tables to look up the function to use, but |
| 310 | - if the table contains both assembler and disassembler functions then |
| 311 | the disassembler contains much of the assembler and vice-versa, |
| 312 | - there's a lot of inlining possibilities as things grow, |
| 313 | - using a switch statement avoids the function call overhead. |
| 314 | |
| 315 | This function could be moved into `parse_insn_normal', but keeping it |
| 316 | separate makes clear the interface between `parse_insn_normal' and each of |
| 317 | the handlers. */ |
| 318 | |
| 319 | const char * |
| 320 | epiphany_cgen_parse_operand (CGEN_CPU_DESC cd, |
| 321 | int opindex, |
| 322 | const char ** strp, |
| 323 | CGEN_FIELDS * fields) |
| 324 | { |
| 325 | const char * errmsg = NULL; |
| 326 | /* Used by scalar operands that still need to be parsed. */ |
| 327 | long junk ATTRIBUTE_UNUSED; |
| 328 | |
| 329 | switch (opindex) |
| 330 | { |
| 331 | case EPIPHANY_OPERAND_DIRECTION : |
| 332 | errmsg = parse_postindex (cd, strp, EPIPHANY_OPERAND_DIRECTION, (unsigned long *) (& fields->f_addsubx)); |
| 333 | break; |
| 334 | case EPIPHANY_OPERAND_DISP11 : |
| 335 | errmsg = parse_uimm_not_reg (cd, strp, EPIPHANY_OPERAND_DISP11, (unsigned long *) (& fields->f_disp11)); |
| 336 | break; |
| 337 | case EPIPHANY_OPERAND_DISP3 : |
| 338 | errmsg = cgen_parse_unsigned_integer (cd, strp, EPIPHANY_OPERAND_DISP3, (unsigned long *) (& fields->f_disp3)); |
| 339 | break; |
| 340 | case EPIPHANY_OPERAND_DPMI : |
| 341 | errmsg = parse_postindex (cd, strp, EPIPHANY_OPERAND_DPMI, (unsigned long *) (& fields->f_subd)); |
| 342 | break; |
| 343 | case EPIPHANY_OPERAND_FRD : |
| 344 | errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rd); |
| 345 | break; |
| 346 | case EPIPHANY_OPERAND_FRD6 : |
| 347 | errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rd6); |
| 348 | break; |
| 349 | case EPIPHANY_OPERAND_FRM : |
| 350 | errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rm); |
| 351 | break; |
| 352 | case EPIPHANY_OPERAND_FRM6 : |
| 353 | errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rm6); |
| 354 | break; |
| 355 | case EPIPHANY_OPERAND_FRN : |
| 356 | errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rn); |
| 357 | break; |
| 358 | case EPIPHANY_OPERAND_FRN6 : |
| 359 | errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rn6); |
| 360 | break; |
| 361 | case EPIPHANY_OPERAND_IMM16 : |
| 362 | { |
| 363 | bfd_vma value = 0; |
| 364 | errmsg = parse_imm16 (cd, strp, EPIPHANY_OPERAND_IMM16, 0, NULL, & value); |
| 365 | fields->f_imm16 = value; |
| 366 | } |
| 367 | break; |
| 368 | case EPIPHANY_OPERAND_IMM8 : |
| 369 | { |
| 370 | bfd_vma value = 0; |
| 371 | errmsg = parse_imm8 (cd, strp, EPIPHANY_OPERAND_IMM8, 0, NULL, & value); |
| 372 | fields->f_imm8 = value; |
| 373 | } |
| 374 | break; |
| 375 | case EPIPHANY_OPERAND_RD : |
| 376 | errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rd); |
| 377 | break; |
| 378 | case EPIPHANY_OPERAND_RD6 : |
| 379 | errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rd6); |
| 380 | break; |
| 381 | case EPIPHANY_OPERAND_RM : |
| 382 | errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rm); |
| 383 | break; |
| 384 | case EPIPHANY_OPERAND_RM6 : |
| 385 | errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rm6); |
| 386 | break; |
| 387 | case EPIPHANY_OPERAND_RN : |
| 388 | errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rn); |
| 389 | break; |
| 390 | case EPIPHANY_OPERAND_RN6 : |
| 391 | errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_gr_names, & fields->f_rn6); |
| 392 | break; |
| 393 | case EPIPHANY_OPERAND_SD : |
| 394 | errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_cr_names, & fields->f_sd); |
| 395 | break; |
| 396 | case EPIPHANY_OPERAND_SD6 : |
| 397 | errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_cr_names, & fields->f_sd6); |
| 398 | break; |
| 399 | case EPIPHANY_OPERAND_SDDMA : |
| 400 | errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_crdma_names, & fields->f_sd6); |
| 401 | break; |
| 402 | case EPIPHANY_OPERAND_SDMEM : |
| 403 | errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_crmem_names, & fields->f_sd6); |
| 404 | break; |
| 405 | case EPIPHANY_OPERAND_SDMESH : |
| 406 | errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_crmesh_names, & fields->f_sd6); |
| 407 | break; |
| 408 | case EPIPHANY_OPERAND_SHIFT : |
| 409 | errmsg = cgen_parse_unsigned_integer (cd, strp, EPIPHANY_OPERAND_SHIFT, (unsigned long *) (& fields->f_shift)); |
| 410 | break; |
| 411 | case EPIPHANY_OPERAND_SIMM11 : |
| 412 | errmsg = parse_simm_not_reg (cd, strp, EPIPHANY_OPERAND_SIMM11, (long *) (& fields->f_sdisp11)); |
| 413 | break; |
| 414 | case EPIPHANY_OPERAND_SIMM24 : |
| 415 | { |
| 416 | bfd_vma value = 0; |
| 417 | errmsg = parse_branch_addr (cd, strp, EPIPHANY_OPERAND_SIMM24, 0, NULL, & value); |
| 418 | fields->f_simm24 = value; |
| 419 | } |
| 420 | break; |
| 421 | case EPIPHANY_OPERAND_SIMM3 : |
| 422 | errmsg = parse_simm_not_reg (cd, strp, EPIPHANY_OPERAND_SIMM3, (long *) (& fields->f_sdisp3)); |
| 423 | break; |
| 424 | case EPIPHANY_OPERAND_SIMM8 : |
| 425 | { |
| 426 | bfd_vma value = 0; |
| 427 | errmsg = parse_branch_addr (cd, strp, EPIPHANY_OPERAND_SIMM8, 0, NULL, & value); |
| 428 | fields->f_simm8 = value; |
| 429 | } |
| 430 | break; |
| 431 | case EPIPHANY_OPERAND_SN : |
| 432 | errmsg = parse_shortregs (cd, strp, & epiphany_cgen_opval_cr_names, & fields->f_sn); |
| 433 | break; |
| 434 | case EPIPHANY_OPERAND_SN6 : |
| 435 | errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_cr_names, & fields->f_sn6); |
| 436 | break; |
| 437 | case EPIPHANY_OPERAND_SNDMA : |
| 438 | errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_crdma_names, & fields->f_sn6); |
| 439 | break; |
| 440 | case EPIPHANY_OPERAND_SNMEM : |
| 441 | errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_crmem_names, & fields->f_sn6); |
| 442 | break; |
| 443 | case EPIPHANY_OPERAND_SNMESH : |
| 444 | errmsg = cgen_parse_keyword (cd, strp, & epiphany_cgen_opval_crmesh_names, & fields->f_sn6); |
| 445 | break; |
| 446 | case EPIPHANY_OPERAND_SWI_NUM : |
| 447 | errmsg = parse_uimm_not_reg (cd, strp, EPIPHANY_OPERAND_SWI_NUM, (unsigned long *) (& fields->f_trap_num)); |
| 448 | break; |
| 449 | case EPIPHANY_OPERAND_TRAPNUM6 : |
| 450 | errmsg = cgen_parse_unsigned_integer (cd, strp, EPIPHANY_OPERAND_TRAPNUM6, (unsigned long *) (& fields->f_trap_num)); |
| 451 | break; |
| 452 | |
| 453 | default : |
| 454 | /* xgettext:c-format */ |
| 455 | opcodes_error_handler |
| 456 | (_("internal error: unrecognized field %d while parsing"), |
| 457 | opindex); |
| 458 | abort (); |
| 459 | } |
| 460 | |
| 461 | return errmsg; |
| 462 | } |
| 463 | |
| 464 | cgen_parse_fn * const epiphany_cgen_parse_handlers[] = |
| 465 | { |
| 466 | parse_insn_normal, |
| 467 | }; |
| 468 | |
| 469 | void |
| 470 | epiphany_cgen_init_asm (CGEN_CPU_DESC cd) |
| 471 | { |
| 472 | epiphany_cgen_init_opcode_table (cd); |
| 473 | epiphany_cgen_init_ibld_table (cd); |
| 474 | cd->parse_handlers = & epiphany_cgen_parse_handlers[0]; |
| 475 | cd->parse_operand = epiphany_cgen_parse_operand; |
| 476 | #ifdef CGEN_ASM_INIT_HOOK |
| 477 | CGEN_ASM_INIT_HOOK |
| 478 | #endif |
| 479 | } |
| 480 | |
| 481 | \f |
| 482 | |
| 483 | /* Regex construction routine. |
| 484 | |
| 485 | This translates an opcode syntax string into a regex string, |
| 486 | by replacing any non-character syntax element (such as an |
| 487 | opcode) with the pattern '.*' |
| 488 | |
| 489 | It then compiles the regex and stores it in the opcode, for |
| 490 | later use by epiphany_cgen_assemble_insn |
| 491 | |
| 492 | Returns NULL for success, an error message for failure. */ |
| 493 | |
| 494 | char * |
| 495 | epiphany_cgen_build_insn_regex (CGEN_INSN *insn) |
| 496 | { |
| 497 | CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn); |
| 498 | const char *mnem = CGEN_INSN_MNEMONIC (insn); |
| 499 | char rxbuf[CGEN_MAX_RX_ELEMENTS]; |
| 500 | char *rx = rxbuf; |
| 501 | const CGEN_SYNTAX_CHAR_TYPE *syn; |
| 502 | int reg_err; |
| 503 | |
| 504 | syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc)); |
| 505 | |
| 506 | /* Mnemonics come first in the syntax string. */ |
| 507 | if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) |
| 508 | return _("missing mnemonic in syntax string"); |
| 509 | ++syn; |
| 510 | |
| 511 | /* Generate a case sensitive regular expression that emulates case |
| 512 | insensitive matching in the "C" locale. We cannot generate a case |
| 513 | insensitive regular expression because in Turkish locales, 'i' and 'I' |
| 514 | are not equal modulo case conversion. */ |
| 515 | |
| 516 | /* Copy the literal mnemonic out of the insn. */ |
| 517 | for (; *mnem; mnem++) |
| 518 | { |
| 519 | char c = *mnem; |
| 520 | |
| 521 | if (ISALPHA (c)) |
| 522 | { |
| 523 | *rx++ = '['; |
| 524 | *rx++ = TOLOWER (c); |
| 525 | *rx++ = TOUPPER (c); |
| 526 | *rx++ = ']'; |
| 527 | } |
| 528 | else |
| 529 | *rx++ = c; |
| 530 | } |
| 531 | |
| 532 | /* Copy any remaining literals from the syntax string into the rx. */ |
| 533 | for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn) |
| 534 | { |
| 535 | if (CGEN_SYNTAX_CHAR_P (* syn)) |
| 536 | { |
| 537 | char c = CGEN_SYNTAX_CHAR (* syn); |
| 538 | |
| 539 | switch (c) |
| 540 | { |
| 541 | /* Escape any regex metacharacters in the syntax. */ |
| 542 | case '.': case '[': case '\\': |
| 543 | case '*': case '^': case '$': |
| 544 | |
| 545 | #ifdef CGEN_ESCAPE_EXTENDED_REGEX |
| 546 | case '?': case '{': case '}': |
| 547 | case '(': case ')': case '*': |
| 548 | case '|': case '+': case ']': |
| 549 | #endif |
| 550 | *rx++ = '\\'; |
| 551 | *rx++ = c; |
| 552 | break; |
| 553 | |
| 554 | default: |
| 555 | if (ISALPHA (c)) |
| 556 | { |
| 557 | *rx++ = '['; |
| 558 | *rx++ = TOLOWER (c); |
| 559 | *rx++ = TOUPPER (c); |
| 560 | *rx++ = ']'; |
| 561 | } |
| 562 | else |
| 563 | *rx++ = c; |
| 564 | break; |
| 565 | } |
| 566 | } |
| 567 | else |
| 568 | { |
| 569 | /* Replace non-syntax fields with globs. */ |
| 570 | *rx++ = '.'; |
| 571 | *rx++ = '*'; |
| 572 | } |
| 573 | } |
| 574 | |
| 575 | /* Trailing whitespace ok. */ |
| 576 | * rx++ = '['; |
| 577 | * rx++ = ' '; |
| 578 | * rx++ = '\t'; |
| 579 | * rx++ = ']'; |
| 580 | * rx++ = '*'; |
| 581 | |
| 582 | /* But anchor it after that. */ |
| 583 | * rx++ = '$'; |
| 584 | * rx = '\0'; |
| 585 | |
| 586 | CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t)); |
| 587 | reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB); |
| 588 | |
| 589 | if (reg_err == 0) |
| 590 | return NULL; |
| 591 | else |
| 592 | { |
| 593 | static char msg[80]; |
| 594 | |
| 595 | regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80); |
| 596 | regfree ((regex_t *) CGEN_INSN_RX (insn)); |
| 597 | free (CGEN_INSN_RX (insn)); |
| 598 | (CGEN_INSN_RX (insn)) = NULL; |
| 599 | return msg; |
| 600 | } |
| 601 | } |
| 602 | |
| 603 | \f |
| 604 | /* Default insn parser. |
| 605 | |
| 606 | The syntax string is scanned and operands are parsed and stored in FIELDS. |
| 607 | Relocs are queued as we go via other callbacks. |
| 608 | |
| 609 | ??? Note that this is currently an all-or-nothing parser. If we fail to |
| 610 | parse the instruction, we return 0 and the caller will start over from |
| 611 | the beginning. Backtracking will be necessary in parsing subexpressions, |
| 612 | but that can be handled there. Not handling backtracking here may get |
| 613 | expensive in the case of the m68k. Deal with later. |
| 614 | |
| 615 | Returns NULL for success, an error message for failure. */ |
| 616 | |
| 617 | static const char * |
| 618 | parse_insn_normal (CGEN_CPU_DESC cd, |
| 619 | const CGEN_INSN *insn, |
| 620 | const char **strp, |
| 621 | CGEN_FIELDS *fields) |
| 622 | { |
| 623 | /* ??? Runtime added insns not handled yet. */ |
| 624 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); |
| 625 | const char *str = *strp; |
| 626 | const char *errmsg; |
| 627 | const char *p; |
| 628 | const CGEN_SYNTAX_CHAR_TYPE * syn; |
| 629 | #ifdef CGEN_MNEMONIC_OPERANDS |
| 630 | /* FIXME: wip */ |
| 631 | int past_opcode_p; |
| 632 | #endif |
| 633 | |
| 634 | /* For now we assume the mnemonic is first (there are no leading operands). |
| 635 | We can parse it without needing to set up operand parsing. |
| 636 | GAS's input scrubber will ensure mnemonics are lowercase, but we may |
| 637 | not be called from GAS. */ |
| 638 | p = CGEN_INSN_MNEMONIC (insn); |
| 639 | while (*p && TOLOWER (*p) == TOLOWER (*str)) |
| 640 | ++p, ++str; |
| 641 | |
| 642 | if (* p) |
| 643 | return _("unrecognized instruction"); |
| 644 | |
| 645 | #ifndef CGEN_MNEMONIC_OPERANDS |
| 646 | if (* str && ! ISSPACE (* str)) |
| 647 | return _("unrecognized instruction"); |
| 648 | #endif |
| 649 | |
| 650 | CGEN_INIT_PARSE (cd); |
| 651 | cgen_init_parse_operand (cd); |
| 652 | #ifdef CGEN_MNEMONIC_OPERANDS |
| 653 | past_opcode_p = 0; |
| 654 | #endif |
| 655 | |
| 656 | /* We don't check for (*str != '\0') here because we want to parse |
| 657 | any trailing fake arguments in the syntax string. */ |
| 658 | syn = CGEN_SYNTAX_STRING (syntax); |
| 659 | |
| 660 | /* Mnemonics come first for now, ensure valid string. */ |
| 661 | if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) |
| 662 | abort (); |
| 663 | |
| 664 | ++syn; |
| 665 | |
| 666 | while (* syn != 0) |
| 667 | { |
| 668 | /* Non operand chars must match exactly. */ |
| 669 | if (CGEN_SYNTAX_CHAR_P (* syn)) |
| 670 | { |
| 671 | /* FIXME: While we allow for non-GAS callers above, we assume the |
| 672 | first char after the mnemonic part is a space. */ |
| 673 | /* FIXME: We also take inappropriate advantage of the fact that |
| 674 | GAS's input scrubber will remove extraneous blanks. */ |
| 675 | if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn))) |
| 676 | { |
| 677 | #ifdef CGEN_MNEMONIC_OPERANDS |
| 678 | if (CGEN_SYNTAX_CHAR(* syn) == ' ') |
| 679 | past_opcode_p = 1; |
| 680 | #endif |
| 681 | ++ syn; |
| 682 | ++ str; |
| 683 | } |
| 684 | else if (*str) |
| 685 | { |
| 686 | /* Syntax char didn't match. Can't be this insn. */ |
| 687 | static char msg [80]; |
| 688 | |
| 689 | /* xgettext:c-format */ |
| 690 | sprintf (msg, _("syntax error (expected char `%c', found `%c')"), |
| 691 | CGEN_SYNTAX_CHAR(*syn), *str); |
| 692 | return msg; |
| 693 | } |
| 694 | else |
| 695 | { |
| 696 | /* Ran out of input. */ |
| 697 | static char msg [80]; |
| 698 | |
| 699 | /* xgettext:c-format */ |
| 700 | sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"), |
| 701 | CGEN_SYNTAX_CHAR(*syn)); |
| 702 | return msg; |
| 703 | } |
| 704 | continue; |
| 705 | } |
| 706 | |
| 707 | #ifdef CGEN_MNEMONIC_OPERANDS |
| 708 | (void) past_opcode_p; |
| 709 | #endif |
| 710 | /* We have an operand of some sort. */ |
| 711 | errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields); |
| 712 | if (errmsg) |
| 713 | return errmsg; |
| 714 | |
| 715 | /* Done with this operand, continue with next one. */ |
| 716 | ++ syn; |
| 717 | } |
| 718 | |
| 719 | /* If we're at the end of the syntax string, we're done. */ |
| 720 | if (* syn == 0) |
| 721 | { |
| 722 | /* FIXME: For the moment we assume a valid `str' can only contain |
| 723 | blanks now. IE: We needn't try again with a longer version of |
| 724 | the insn and it is assumed that longer versions of insns appear |
| 725 | before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ |
| 726 | while (ISSPACE (* str)) |
| 727 | ++ str; |
| 728 | |
| 729 | if (* str != '\0') |
| 730 | return _("junk at end of line"); /* FIXME: would like to include `str' */ |
| 731 | |
| 732 | return NULL; |
| 733 | } |
| 734 | |
| 735 | /* We couldn't parse it. */ |
| 736 | return _("unrecognized instruction"); |
| 737 | } |
| 738 | \f |
| 739 | /* Main entry point. |
| 740 | This routine is called for each instruction to be assembled. |
| 741 | STR points to the insn to be assembled. |
| 742 | We assume all necessary tables have been initialized. |
| 743 | The assembled instruction, less any fixups, is stored in BUF. |
| 744 | Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value |
| 745 | still needs to be converted to target byte order, otherwise BUF is an array |
| 746 | of bytes in target byte order. |
| 747 | The result is a pointer to the insn's entry in the opcode table, |
| 748 | or NULL if an error occured (an error message will have already been |
| 749 | printed). |
| 750 | |
| 751 | Note that when processing (non-alias) macro-insns, |
| 752 | this function recurses. |
| 753 | |
| 754 | ??? It's possible to make this cpu-independent. |
| 755 | One would have to deal with a few minor things. |
| 756 | At this point in time doing so would be more of a curiosity than useful |
| 757 | [for example this file isn't _that_ big], but keeping the possibility in |
| 758 | mind helps keep the design clean. */ |
| 759 | |
| 760 | const CGEN_INSN * |
| 761 | epiphany_cgen_assemble_insn (CGEN_CPU_DESC cd, |
| 762 | const char *str, |
| 763 | CGEN_FIELDS *fields, |
| 764 | CGEN_INSN_BYTES_PTR buf, |
| 765 | char **errmsg) |
| 766 | { |
| 767 | const char *start; |
| 768 | CGEN_INSN_LIST *ilist; |
| 769 | const char *parse_errmsg = NULL; |
| 770 | const char *insert_errmsg = NULL; |
| 771 | int recognized_mnemonic = 0; |
| 772 | |
| 773 | /* Skip leading white space. */ |
| 774 | while (ISSPACE (* str)) |
| 775 | ++ str; |
| 776 | |
| 777 | /* The instructions are stored in hashed lists. |
| 778 | Get the first in the list. */ |
| 779 | ilist = CGEN_ASM_LOOKUP_INSN (cd, str); |
| 780 | |
| 781 | /* Keep looking until we find a match. */ |
| 782 | start = str; |
| 783 | for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist)) |
| 784 | { |
| 785 | const CGEN_INSN *insn = ilist->insn; |
| 786 | recognized_mnemonic = 1; |
| 787 | |
| 788 | #ifdef CGEN_VALIDATE_INSN_SUPPORTED |
| 789 | /* Not usually needed as unsupported opcodes |
| 790 | shouldn't be in the hash lists. */ |
| 791 | /* Is this insn supported by the selected cpu? */ |
| 792 | if (! epiphany_cgen_insn_supported (cd, insn)) |
| 793 | continue; |
| 794 | #endif |
| 795 | /* If the RELAXED attribute is set, this is an insn that shouldn't be |
| 796 | chosen immediately. Instead, it is used during assembler/linker |
| 797 | relaxation if possible. */ |
| 798 | if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0) |
| 799 | continue; |
| 800 | |
| 801 | str = start; |
| 802 | |
| 803 | /* Skip this insn if str doesn't look right lexically. */ |
| 804 | if (CGEN_INSN_RX (insn) != NULL && |
| 805 | regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH) |
| 806 | continue; |
| 807 | |
| 808 | /* Allow parse/insert handlers to obtain length of insn. */ |
| 809 | CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); |
| 810 | |
| 811 | parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields); |
| 812 | if (parse_errmsg != NULL) |
| 813 | continue; |
| 814 | |
| 815 | /* ??? 0 is passed for `pc'. */ |
| 816 | insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf, |
| 817 | (bfd_vma) 0); |
| 818 | if (insert_errmsg != NULL) |
| 819 | continue; |
| 820 | |
| 821 | /* It is up to the caller to actually output the insn and any |
| 822 | queued relocs. */ |
| 823 | return insn; |
| 824 | } |
| 825 | |
| 826 | { |
| 827 | static char errbuf[150]; |
| 828 | const char *tmp_errmsg; |
| 829 | #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS |
| 830 | #define be_verbose 1 |
| 831 | #else |
| 832 | #define be_verbose 0 |
| 833 | #endif |
| 834 | |
| 835 | if (be_verbose) |
| 836 | { |
| 837 | /* If requesting verbose error messages, use insert_errmsg. |
| 838 | Failing that, use parse_errmsg. */ |
| 839 | tmp_errmsg = (insert_errmsg ? insert_errmsg : |
| 840 | parse_errmsg ? parse_errmsg : |
| 841 | recognized_mnemonic ? |
| 842 | _("unrecognized form of instruction") : |
| 843 | _("unrecognized instruction")); |
| 844 | |
| 845 | if (strlen (start) > 50) |
| 846 | /* xgettext:c-format */ |
| 847 | sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start); |
| 848 | else |
| 849 | /* xgettext:c-format */ |
| 850 | sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start); |
| 851 | } |
| 852 | else |
| 853 | { |
| 854 | if (strlen (start) > 50) |
| 855 | /* xgettext:c-format */ |
| 856 | sprintf (errbuf, _("bad instruction `%.50s...'"), start); |
| 857 | else |
| 858 | /* xgettext:c-format */ |
| 859 | sprintf (errbuf, _("bad instruction `%.50s'"), start); |
| 860 | } |
| 861 | |
| 862 | *errmsg = errbuf; |
| 863 | return NULL; |
| 864 | } |
| 865 | } |