1 /* DO NOT EDIT! -*- buffer-read-only: t -*- vi:set ro: */ 2 /* Disassembler 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-dis.in isn't 7 8 Copyright (C) 1996-2018 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 /* ??? 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 "disassemble.h" 33 #include "bfd.h" 34 #include "symcat.h" 35 #include "libiberty.h" 36 #include "ip2k-desc.h" 37 #include "ip2k-opc.h" 38 #include "opintl.h" 39 40 /* Default text to print if an instruction isn't recognized. */ 41 #define UNKNOWN_INSN_MSG _("*unknown*") 42 43 static void print_normal 44 (CGEN_CPU_DESC, void *, long, unsigned int, bfd_vma, int); 45 static void print_address 46 (CGEN_CPU_DESC, void *, bfd_vma, unsigned int, bfd_vma, int) ATTRIBUTE_UNUSED; 47 static void print_keyword 48 (CGEN_CPU_DESC, void *, CGEN_KEYWORD *, long, unsigned int) ATTRIBUTE_UNUSED; 49 static void print_insn_normal 50 (CGEN_CPU_DESC, void *, const CGEN_INSN *, CGEN_FIELDS *, bfd_vma, int); 51 static int print_insn 52 (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, unsigned); 53 static int default_print_insn 54 (CGEN_CPU_DESC, bfd_vma, disassemble_info *) ATTRIBUTE_UNUSED; 55 static int read_insn 56 (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, int, CGEN_EXTRACT_INFO *, 57 unsigned long *); 58 59 /* -- disassembler routines inserted here. */ 60 61 /* -- dis.c */ 62 63 static void 64 print_fr (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 65 void * dis_info, 66 long value, 67 unsigned int attrs ATTRIBUTE_UNUSED, 68 bfd_vma pc ATTRIBUTE_UNUSED, 69 int length ATTRIBUTE_UNUSED) 70 { 71 disassemble_info *info = (disassemble_info *) dis_info; 72 const CGEN_KEYWORD_ENTRY *ke; 73 extern CGEN_KEYWORD ip2k_cgen_opval_register_names; 74 long offsettest; 75 long offsetvalue; 76 77 if (value == 0) /* This is (IP). */ 78 { 79 (*info->fprintf_func) (info->stream, "%s", "(IP)"); 80 return; 81 } 82 83 offsettest = value >> 7; 84 offsetvalue = value & 0x7F; 85 86 /* Check to see if first two bits are 10 -> (DP). */ 87 if (offsettest == 2) 88 { 89 if (offsetvalue == 0) 90 (*info->fprintf_func) (info->stream, "%s","(DP)"); 91 else 92 (*info->fprintf_func) (info->stream, "$%lx%s", offsetvalue, "(DP)"); 93 return; 94 } 95 96 /* Check to see if first two bits are 11 -> (SP). */ 97 if (offsettest == 3) 98 { 99 if (offsetvalue == 0) 100 (*info->fprintf_func) (info->stream, "%s", "(SP)"); 101 else 102 (*info->fprintf_func) (info->stream, "$%lx%s", offsetvalue,"(SP)"); 103 return; 104 } 105 106 /* Attempt to print as a register keyword. */ 107 ke = cgen_keyword_lookup_value (& ip2k_cgen_opval_register_names, value); 108 109 if (ke != NULL) 110 (*info->fprintf_func) (info->stream, "%s", ke->name); 111 else 112 /* Print as an address literal. */ 113 (*info->fprintf_func) (info->stream, "$%02lx", value); 114 } 115 116 static void 117 print_dollarhex (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 118 void * dis_info, 119 long value, 120 unsigned int attrs ATTRIBUTE_UNUSED, 121 bfd_vma pc ATTRIBUTE_UNUSED, 122 int length ATTRIBUTE_UNUSED) 123 { 124 disassemble_info *info = (disassemble_info *) dis_info; 125 126 (*info->fprintf_func) (info->stream, "$%lx", value); 127 } 128 129 static void 130 print_dollarhex8 (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 131 void * dis_info, 132 long value, 133 unsigned int attrs ATTRIBUTE_UNUSED, 134 bfd_vma pc ATTRIBUTE_UNUSED, 135 int length ATTRIBUTE_UNUSED) 136 { 137 disassemble_info *info = (disassemble_info *) dis_info; 138 139 (*info->fprintf_func) (info->stream, "$%02lx", value); 140 } 141 142 static void 143 print_dollarhex_addr16h (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 144 void * dis_info, 145 long value, 146 unsigned int attrs ATTRIBUTE_UNUSED, 147 bfd_vma pc ATTRIBUTE_UNUSED, 148 int length ATTRIBUTE_UNUSED) 149 { 150 disassemble_info *info = (disassemble_info *) dis_info; 151 152 /* This is a loadh instruction. Shift the value to the left 153 by 8 bits so that disassembled code will reassemble properly. */ 154 value = ((value << 8) & 0xFF00); 155 156 (*info->fprintf_func) (info->stream, "$%04lx", value); 157 } 158 159 static void 160 print_dollarhex_addr16l (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 161 void * dis_info, 162 long value, 163 unsigned int attrs ATTRIBUTE_UNUSED, 164 bfd_vma pc ATTRIBUTE_UNUSED, 165 int length ATTRIBUTE_UNUSED) 166 { 167 disassemble_info *info = (disassemble_info *) dis_info; 168 169 (*info->fprintf_func) (info->stream, "$%04lx", value); 170 } 171 172 static void 173 print_dollarhex_p (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 174 void * dis_info, 175 long value, 176 unsigned int attrs ATTRIBUTE_UNUSED, 177 bfd_vma pc ATTRIBUTE_UNUSED, 178 int length ATTRIBUTE_UNUSED) 179 { 180 disassemble_info *info = (disassemble_info *) dis_info; 181 182 value = ((value << 14) & 0x1C000); 183 ;value = (value & 0x1FFFF); 184 (*info->fprintf_func) (info->stream, "$%05lx", value); 185 } 186 187 static void 188 print_dollarhex_cj (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 189 void * dis_info, 190 long value, 191 unsigned int attrs ATTRIBUTE_UNUSED, 192 bfd_vma pc ATTRIBUTE_UNUSED, 193 int length ATTRIBUTE_UNUSED) 194 { 195 disassemble_info *info = (disassemble_info *) dis_info; 196 197 value = ((value << 1) & 0x1FFFF); 198 (*info->fprintf_func) (info->stream, "$%05lx", value); 199 } 200 201 static void 202 print_decimal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 203 void * dis_info, 204 long value, 205 unsigned int attrs ATTRIBUTE_UNUSED, 206 bfd_vma pc ATTRIBUTE_UNUSED, 207 int length ATTRIBUTE_UNUSED) 208 { 209 disassemble_info *info = (disassemble_info *) dis_info; 210 211 (*info->fprintf_func) (info->stream, "%ld", value); 212 } 213 214 215 216 /* -- */ 217 218 void ip2k_cgen_print_operand 219 (CGEN_CPU_DESC, int, PTR, CGEN_FIELDS *, void const *, bfd_vma, int); 220 221 /* Main entry point for printing operands. 222 XINFO is a `void *' and not a `disassemble_info *' to not put a requirement 223 of dis-asm.h on cgen.h. 224 225 This function is basically just a big switch statement. Earlier versions 226 used tables to look up the function to use, but 227 - if the table contains both assembler and disassembler functions then 228 the disassembler contains much of the assembler and vice-versa, 229 - there's a lot of inlining possibilities as things grow, 230 - using a switch statement avoids the function call overhead. 231 232 This function could be moved into `print_insn_normal', but keeping it 233 separate makes clear the interface between `print_insn_normal' and each of 234 the handlers. */ 235 236 void 237 ip2k_cgen_print_operand (CGEN_CPU_DESC cd, 238 int opindex, 239 void * xinfo, 240 CGEN_FIELDS *fields, 241 void const *attrs ATTRIBUTE_UNUSED, 242 bfd_vma pc, 243 int length) 244 { 245 disassemble_info *info = (disassemble_info *) xinfo; 246 247 switch (opindex) 248 { 249 case IP2K_OPERAND_ADDR16CJP : 250 print_dollarhex_cj (cd, info, fields->f_addr16cjp, 0|(1<<CGEN_OPERAND_ABS_ADDR), pc, length); 251 break; 252 case IP2K_OPERAND_ADDR16H : 253 print_dollarhex_addr16h (cd, info, fields->f_imm8, 0, pc, length); 254 break; 255 case IP2K_OPERAND_ADDR16L : 256 print_dollarhex_addr16l (cd, info, fields->f_imm8, 0, pc, length); 257 break; 258 case IP2K_OPERAND_ADDR16P : 259 print_dollarhex_p (cd, info, fields->f_page3, 0, pc, length); 260 break; 261 case IP2K_OPERAND_BITNO : 262 print_decimal (cd, info, fields->f_bitno, 0, pc, length); 263 break; 264 case IP2K_OPERAND_CBIT : 265 print_normal (cd, info, 0, 0, pc, length); 266 break; 267 case IP2K_OPERAND_DCBIT : 268 print_normal (cd, info, 0, 0, pc, length); 269 break; 270 case IP2K_OPERAND_FR : 271 print_fr (cd, info, fields->f_reg, 0|(1<<CGEN_OPERAND_ABS_ADDR), pc, length); 272 break; 273 case IP2K_OPERAND_LIT8 : 274 print_dollarhex8 (cd, info, fields->f_imm8, 0|(1<<CGEN_OPERAND_SIGNED), pc, length); 275 break; 276 case IP2K_OPERAND_PABITS : 277 print_normal (cd, info, 0, 0, pc, length); 278 break; 279 case IP2K_OPERAND_RETI3 : 280 print_dollarhex (cd, info, fields->f_reti3, 0, pc, length); 281 break; 282 case IP2K_OPERAND_ZBIT : 283 print_normal (cd, info, 0, 0, pc, length); 284 break; 285 286 default : 287 /* xgettext:c-format */ 288 fprintf (stderr, _("Unrecognized field %d while printing insn.\n"), 289 opindex); 290 abort (); 291 } 292 } 293 294 cgen_print_fn * const ip2k_cgen_print_handlers[] = 295 { 296 print_insn_normal, 297 }; 298 299 300 void 301 ip2k_cgen_init_dis (CGEN_CPU_DESC cd) 302 { 303 ip2k_cgen_init_opcode_table (cd); 304 ip2k_cgen_init_ibld_table (cd); 305 cd->print_handlers = & ip2k_cgen_print_handlers[0]; 306 cd->print_operand = ip2k_cgen_print_operand; 307 } 308 309 310 /* Default print handler. */ 311 312 static void 313 print_normal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 314 void *dis_info, 315 long value, 316 unsigned int attrs, 317 bfd_vma pc ATTRIBUTE_UNUSED, 318 int length ATTRIBUTE_UNUSED) 319 { 320 disassemble_info *info = (disassemble_info *) dis_info; 321 322 /* Print the operand as directed by the attributes. */ 323 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY)) 324 ; /* nothing to do */ 325 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED)) 326 (*info->fprintf_func) (info->stream, "%ld", value); 327 else 328 (*info->fprintf_func) (info->stream, "0x%lx", value); 329 } 330 331 /* Default address handler. */ 332 333 static void 334 print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 335 void *dis_info, 336 bfd_vma value, 337 unsigned int attrs, 338 bfd_vma pc ATTRIBUTE_UNUSED, 339 int length ATTRIBUTE_UNUSED) 340 { 341 disassemble_info *info = (disassemble_info *) dis_info; 342 343 /* Print the operand as directed by the attributes. */ 344 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY)) 345 ; /* Nothing to do. */ 346 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR)) 347 (*info->print_address_func) (value, info); 348 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR)) 349 (*info->print_address_func) (value, info); 350 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED)) 351 (*info->fprintf_func) (info->stream, "%ld", (long) value); 352 else 353 (*info->fprintf_func) (info->stream, "0x%lx", (long) value); 354 } 355 356 /* Keyword print handler. */ 357 358 static void 359 print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 360 void *dis_info, 361 CGEN_KEYWORD *keyword_table, 362 long value, 363 unsigned int attrs ATTRIBUTE_UNUSED) 364 { 365 disassemble_info *info = (disassemble_info *) dis_info; 366 const CGEN_KEYWORD_ENTRY *ke; 367 368 ke = cgen_keyword_lookup_value (keyword_table, value); 369 if (ke != NULL) 370 (*info->fprintf_func) (info->stream, "%s", ke->name); 371 else 372 (*info->fprintf_func) (info->stream, "???"); 373 } 374 375 /* Default insn printer. 376 377 DIS_INFO is defined as `void *' so the disassembler needn't know anything 378 about disassemble_info. */ 379 380 static void 381 print_insn_normal (CGEN_CPU_DESC cd, 382 void *dis_info, 383 const CGEN_INSN *insn, 384 CGEN_FIELDS *fields, 385 bfd_vma pc, 386 int length) 387 { 388 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); 389 disassemble_info *info = (disassemble_info *) dis_info; 390 const CGEN_SYNTAX_CHAR_TYPE *syn; 391 392 CGEN_INIT_PRINT (cd); 393 394 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn) 395 { 396 if (CGEN_SYNTAX_MNEMONIC_P (*syn)) 397 { 398 (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn)); 399 continue; 400 } 401 if (CGEN_SYNTAX_CHAR_P (*syn)) 402 { 403 (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn)); 404 continue; 405 } 406 407 /* We have an operand. */ 408 ip2k_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info, 409 fields, CGEN_INSN_ATTRS (insn), pc, length); 410 } 411 } 412 413 /* Subroutine of print_insn. Reads an insn into the given buffers and updates 414 the extract info. 415 Returns 0 if all is well, non-zero otherwise. */ 416 417 static int 418 read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 419 bfd_vma pc, 420 disassemble_info *info, 421 bfd_byte *buf, 422 int buflen, 423 CGEN_EXTRACT_INFO *ex_info, 424 unsigned long *insn_value) 425 { 426 int status = (*info->read_memory_func) (pc, buf, buflen, info); 427 428 if (status != 0) 429 { 430 (*info->memory_error_func) (status, pc, info); 431 return -1; 432 } 433 434 ex_info->dis_info = info; 435 ex_info->valid = (1 << buflen) - 1; 436 ex_info->insn_bytes = buf; 437 438 *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG); 439 return 0; 440 } 441 442 /* Utility to print an insn. 443 BUF is the base part of the insn, target byte order, BUFLEN bytes long. 444 The result is the size of the insn in bytes or zero for an unknown insn 445 or -1 if an error occurs fetching data (memory_error_func will have 446 been called). */ 447 448 static int 449 print_insn (CGEN_CPU_DESC cd, 450 bfd_vma pc, 451 disassemble_info *info, 452 bfd_byte *buf, 453 unsigned int buflen) 454 { 455 CGEN_INSN_INT insn_value; 456 const CGEN_INSN_LIST *insn_list; 457 CGEN_EXTRACT_INFO ex_info; 458 int basesize; 459 460 /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */ 461 basesize = cd->base_insn_bitsize < buflen * 8 ? 462 cd->base_insn_bitsize : buflen * 8; 463 insn_value = cgen_get_insn_value (cd, buf, basesize); 464 465 466 /* Fill in ex_info fields like read_insn would. Don't actually call 467 read_insn, since the incoming buffer is already read (and possibly 468 modified a la m32r). */ 469 ex_info.valid = (1 << buflen) - 1; 470 ex_info.dis_info = info; 471 ex_info.insn_bytes = buf; 472 473 /* The instructions are stored in hash lists. 474 Pick the first one and keep trying until we find the right one. */ 475 476 insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value); 477 while (insn_list != NULL) 478 { 479 const CGEN_INSN *insn = insn_list->insn; 480 CGEN_FIELDS fields; 481 int length; 482 unsigned long insn_value_cropped; 483 484 #ifdef CGEN_VALIDATE_INSN_SUPPORTED 485 /* Not needed as insn shouldn't be in hash lists if not supported. */ 486 /* Supported by this cpu? */ 487 if (! ip2k_cgen_insn_supported (cd, insn)) 488 { 489 insn_list = CGEN_DIS_NEXT_INSN (insn_list); 490 continue; 491 } 492 #endif 493 494 /* Basic bit mask must be correct. */ 495 /* ??? May wish to allow target to defer this check until the extract 496 handler. */ 497 498 /* Base size may exceed this instruction's size. Extract the 499 relevant part from the buffer. */ 500 if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen && 501 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long)) 502 insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn), 503 info->endian == BFD_ENDIAN_BIG); 504 else 505 insn_value_cropped = insn_value; 506 507 if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn)) 508 == CGEN_INSN_BASE_VALUE (insn)) 509 { 510 /* Printing is handled in two passes. The first pass parses the 511 machine insn and extracts the fields. The second pass prints 512 them. */ 513 514 /* Make sure the entire insn is loaded into insn_value, if it 515 can fit. */ 516 if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) && 517 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long)) 518 { 519 unsigned long full_insn_value; 520 int rc = read_insn (cd, pc, info, buf, 521 CGEN_INSN_BITSIZE (insn) / 8, 522 & ex_info, & full_insn_value); 523 if (rc != 0) 524 return rc; 525 length = CGEN_EXTRACT_FN (cd, insn) 526 (cd, insn, &ex_info, full_insn_value, &fields, pc); 527 } 528 else 529 length = CGEN_EXTRACT_FN (cd, insn) 530 (cd, insn, &ex_info, insn_value_cropped, &fields, pc); 531 532 /* Length < 0 -> error. */ 533 if (length < 0) 534 return length; 535 if (length > 0) 536 { 537 CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length); 538 /* Length is in bits, result is in bytes. */ 539 return length / 8; 540 } 541 } 542 543 insn_list = CGEN_DIS_NEXT_INSN (insn_list); 544 } 545 546 return 0; 547 } 548 549 /* Default value for CGEN_PRINT_INSN. 550 The result is the size of the insn in bytes or zero for an unknown insn 551 or -1 if an error occured fetching bytes. */ 552 553 #ifndef CGEN_PRINT_INSN 554 #define CGEN_PRINT_INSN default_print_insn 555 #endif 556 557 static int 558 default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info) 559 { 560 bfd_byte buf[CGEN_MAX_INSN_SIZE]; 561 int buflen; 562 int status; 563 564 /* Attempt to read the base part of the insn. */ 565 buflen = cd->base_insn_bitsize / 8; 566 status = (*info->read_memory_func) (pc, buf, buflen, info); 567 568 /* Try again with the minimum part, if min < base. */ 569 if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize)) 570 { 571 buflen = cd->min_insn_bitsize / 8; 572 status = (*info->read_memory_func) (pc, buf, buflen, info); 573 } 574 575 if (status != 0) 576 { 577 (*info->memory_error_func) (status, pc, info); 578 return -1; 579 } 580 581 return print_insn (cd, pc, info, buf, buflen); 582 } 583 584 /* Main entry point. 585 Print one instruction from PC on INFO->STREAM. 586 Return the size of the instruction (in bytes). */ 587 588 typedef struct cpu_desc_list 589 { 590 struct cpu_desc_list *next; 591 CGEN_BITSET *isa; 592 int mach; 593 int endian; 594 CGEN_CPU_DESC cd; 595 } cpu_desc_list; 596 597 int 598 print_insn_ip2k (bfd_vma pc, disassemble_info *info) 599 { 600 static cpu_desc_list *cd_list = 0; 601 cpu_desc_list *cl = 0; 602 static CGEN_CPU_DESC cd = 0; 603 static CGEN_BITSET *prev_isa; 604 static int prev_mach; 605 static int prev_endian; 606 int length; 607 CGEN_BITSET *isa; 608 int mach; 609 int endian = (info->endian == BFD_ENDIAN_BIG 610 ? CGEN_ENDIAN_BIG 611 : CGEN_ENDIAN_LITTLE); 612 enum bfd_architecture arch; 613 614 /* ??? gdb will set mach but leave the architecture as "unknown" */ 615 #ifndef CGEN_BFD_ARCH 616 #define CGEN_BFD_ARCH bfd_arch_ip2k 617 #endif 618 arch = info->arch; 619 if (arch == bfd_arch_unknown) 620 arch = CGEN_BFD_ARCH; 621 622 /* There's no standard way to compute the machine or isa number 623 so we leave it to the target. */ 624 #ifdef CGEN_COMPUTE_MACH 625 mach = CGEN_COMPUTE_MACH (info); 626 #else 627 mach = info->mach; 628 #endif 629 630 #ifdef CGEN_COMPUTE_ISA 631 { 632 static CGEN_BITSET *permanent_isa; 633 634 if (!permanent_isa) 635 permanent_isa = cgen_bitset_create (MAX_ISAS); 636 isa = permanent_isa; 637 cgen_bitset_clear (isa); 638 cgen_bitset_add (isa, CGEN_COMPUTE_ISA (info)); 639 } 640 #else 641 isa = info->insn_sets; 642 #endif 643 644 /* If we've switched cpu's, try to find a handle we've used before */ 645 if (cd 646 && (cgen_bitset_compare (isa, prev_isa) != 0 647 || mach != prev_mach 648 || endian != prev_endian)) 649 { 650 cd = 0; 651 for (cl = cd_list; cl; cl = cl->next) 652 { 653 if (cgen_bitset_compare (cl->isa, isa) == 0 && 654 cl->mach == mach && 655 cl->endian == endian) 656 { 657 cd = cl->cd; 658 prev_isa = cd->isas; 659 break; 660 } 661 } 662 } 663 664 /* If we haven't initialized yet, initialize the opcode table. */ 665 if (! cd) 666 { 667 const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach); 668 const char *mach_name; 669 670 if (!arch_type) 671 abort (); 672 mach_name = arch_type->printable_name; 673 674 prev_isa = cgen_bitset_copy (isa); 675 prev_mach = mach; 676 prev_endian = endian; 677 cd = ip2k_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa, 678 CGEN_CPU_OPEN_BFDMACH, mach_name, 679 CGEN_CPU_OPEN_ENDIAN, prev_endian, 680 CGEN_CPU_OPEN_END); 681 if (!cd) 682 abort (); 683 684 /* Save this away for future reference. */ 685 cl = xmalloc (sizeof (struct cpu_desc_list)); 686 cl->cd = cd; 687 cl->isa = prev_isa; 688 cl->mach = mach; 689 cl->endian = endian; 690 cl->next = cd_list; 691 cd_list = cl; 692 693 ip2k_cgen_init_dis (cd); 694 } 695 696 /* We try to have as much common code as possible. 697 But at this point some targets need to take over. */ 698 /* ??? Some targets may need a hook elsewhere. Try to avoid this, 699 but if not possible try to move this hook elsewhere rather than 700 have two hooks. */ 701 length = CGEN_PRINT_INSN (cd, pc, info); 702 if (length > 0) 703 return length; 704 if (length < 0) 705 return -1; 706 707 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG); 708 return cd->default_insn_bitsize / 8; 709 } 710