1/* Disassembler interface for targets using CGEN. -*- C -*- 2 CGEN: Cpu tools GENerator 3 4 THIS FILE IS MACHINE GENERATED WITH CGEN. 5 - the resultant file is machine generated, cgen-dis.in isn't 6 7 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2007 8 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 "dis-asm.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 43static void print_normal 44 (CGEN_CPU_DESC, void *, long, unsigned int, bfd_vma, int); 45static void print_address 46 (CGEN_CPU_DESC, void *, bfd_vma, unsigned int, bfd_vma, int) ATTRIBUTE_UNUSED; 47static void print_keyword 48 (CGEN_CPU_DESC, void *, CGEN_KEYWORD *, long, unsigned int) ATTRIBUTE_UNUSED; 49static void print_insn_normal 50 (CGEN_CPU_DESC, void *, const CGEN_INSN *, CGEN_FIELDS *, bfd_vma, int); 51static int print_insn 52 (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, unsigned); 53static int default_print_insn 54 (CGEN_CPU_DESC, bfd_vma, disassemble_info *) ATTRIBUTE_UNUSED; 55static 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 63static void 64print_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, "$%02lx", value); 114} 115 116static void 117print_dollarhex (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 118 void * dis_info, 119 long value, 120 unsigned int attrs ATTRIBUTE_UNUSED, 121 bfd_vma pc ATTRIBUTE_UNUSED, 122 int length ATTRIBUTE_UNUSED) 123{ 124 disassemble_info *info = (disassemble_info *) dis_info; 125 126 (*info->fprintf_func) (info->stream, "$%lx", value); 127} 128 129static void 130print_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, "$%02lx", value); 140} 141 142static void 143print_dollarhex_addr16h (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 144 void * dis_info, 145 long value, 146 unsigned int attrs ATTRIBUTE_UNUSED, 147 bfd_vma pc ATTRIBUTE_UNUSED, 148 int length ATTRIBUTE_UNUSED) 149{ 150 disassemble_info *info = (disassemble_info *) dis_info; 151 152 /* This is a loadh instruction. Shift the value to the left 153 by 8 bits so that disassembled code will reassemble properly. */ 154 value = ((value << 8) & 0xFF00); 155 156 (*info->fprintf_func) (info->stream, "$%04lx", value); 157} 158 159static void 160print_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, "$%04lx", value); 170} 171 172static void 173print_dollarhex_p (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 174 void * dis_info, 175 long value, 176 unsigned int attrs ATTRIBUTE_UNUSED, 177 bfd_vma pc ATTRIBUTE_UNUSED, 178 int length ATTRIBUTE_UNUSED) 179{ 180 disassemble_info *info = (disassemble_info *) dis_info; 181 182 value = ((value << 14) & 0x1C000); 183 ;value = (value & 0x1FFFF); 184 (*info->fprintf_func) (info->stream, "$%05lx", value); 185} 186 187static void 188print_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 201static void 202print_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 218void 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 236void 237ip2k_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 294cgen_print_fn * const ip2k_cgen_print_handlers[] = 295{ 296 print_insn_normal, 297}; 298 299 300void 301ip2k_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 312static void 313print_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#ifdef CGEN_PRINT_NORMAL 323 CGEN_PRINT_NORMAL (cd, info, value, attrs, pc, length); 324#endif 325 326 /* Print the operand as directed by the attributes. */ 327 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY)) 328 ; /* nothing to do */ 329 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED)) 330 (*info->fprintf_func) (info->stream, "%ld", value); 331 else 332 (*info->fprintf_func) (info->stream, "0x%lx", value); 333} 334 335/* Default address handler. */ 336 337static void 338print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 339 void *dis_info, 340 bfd_vma value, 341 unsigned int attrs, 342 bfd_vma pc ATTRIBUTE_UNUSED, 343 int length ATTRIBUTE_UNUSED) 344{ 345 disassemble_info *info = (disassemble_info *) dis_info; 346 347#ifdef CGEN_PRINT_ADDRESS 348 CGEN_PRINT_ADDRESS (cd, info, value, attrs, pc, length); 349#endif 350 351 /* Print the operand as directed by the attributes. */ 352 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY)) 353 ; /* Nothing to do. */ 354 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR)) 355 (*info->print_address_func) (value, info); 356 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR)) 357 (*info->print_address_func) (value, info); 358 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED)) 359 (*info->fprintf_func) (info->stream, "%ld", (long) value); 360 else 361 (*info->fprintf_func) (info->stream, "0x%lx", (long) value); 362} 363 364/* Keyword print handler. */ 365 366static void 367print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 368 void *dis_info, 369 CGEN_KEYWORD *keyword_table, 370 long value, 371 unsigned int attrs ATTRIBUTE_UNUSED) 372{ 373 disassemble_info *info = (disassemble_info *) dis_info; 374 const CGEN_KEYWORD_ENTRY *ke; 375 376 ke = cgen_keyword_lookup_value (keyword_table, value); 377 if (ke != NULL) 378 (*info->fprintf_func) (info->stream, "%s", ke->name); 379 else 380 (*info->fprintf_func) (info->stream, "???"); 381} 382 383/* Default insn printer. 384 385 DIS_INFO is defined as `void *' so the disassembler needn't know anything 386 about disassemble_info. */ 387 388static void 389print_insn_normal (CGEN_CPU_DESC cd, 390 void *dis_info, 391 const CGEN_INSN *insn, 392 CGEN_FIELDS *fields, 393 bfd_vma pc, 394 int length) 395{ 396 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); 397 disassemble_info *info = (disassemble_info *) dis_info; 398 const CGEN_SYNTAX_CHAR_TYPE *syn; 399 400 CGEN_INIT_PRINT (cd); 401 402 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn) 403 { 404 if (CGEN_SYNTAX_MNEMONIC_P (*syn)) 405 { 406 (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn)); 407 continue; 408 } 409 if (CGEN_SYNTAX_CHAR_P (*syn)) 410 { 411 (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn)); 412 continue; 413 } 414 415 /* We have an operand. */ 416 ip2k_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info, 417 fields, CGEN_INSN_ATTRS (insn), pc, length); 418 } 419} 420 421/* Subroutine of print_insn. Reads an insn into the given buffers and updates 422 the extract info. 423 Returns 0 if all is well, non-zero otherwise. */ 424 425static int 426read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, 427 bfd_vma pc, 428 disassemble_info *info, 429 bfd_byte *buf, 430 int buflen, 431 CGEN_EXTRACT_INFO *ex_info, 432 unsigned long *insn_value) 433{ 434 int status = (*info->read_memory_func) (pc, buf, buflen, info); 435 436 if (status != 0) 437 { 438 (*info->memory_error_func) (status, pc, info); 439 return -1; 440 } 441 442 ex_info->dis_info = info; 443 ex_info->valid = (1 << buflen) - 1; 444 ex_info->insn_bytes = buf; 445 446 *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG); 447 return 0; 448} 449 450/* Utility to print an insn. 451 BUF is the base part of the insn, target byte order, BUFLEN bytes long. 452 The result is the size of the insn in bytes or zero for an unknown insn 453 or -1 if an error occurs fetching data (memory_error_func will have 454 been called). */ 455 456static int 457print_insn (CGEN_CPU_DESC cd, 458 bfd_vma pc, 459 disassemble_info *info, 460 bfd_byte *buf, 461 unsigned int buflen) 462{ 463 CGEN_INSN_INT insn_value; 464 const CGEN_INSN_LIST *insn_list; 465 CGEN_EXTRACT_INFO ex_info; 466 int basesize; 467 468 /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */ 469 basesize = cd->base_insn_bitsize < buflen * 8 ? 470 cd->base_insn_bitsize : buflen * 8; 471 insn_value = cgen_get_insn_value (cd, buf, basesize); 472 473 474 /* Fill in ex_info fields like read_insn would. Don't actually call 475 read_insn, since the incoming buffer is already read (and possibly 476 modified a la m32r). */ 477 ex_info.valid = (1 << buflen) - 1; 478 ex_info.dis_info = info; 479 ex_info.insn_bytes = buf; 480 481 /* The instructions are stored in hash lists. 482 Pick the first one and keep trying until we find the right one. */ 483 484 insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value); 485 while (insn_list != NULL) 486 { 487 const CGEN_INSN *insn = insn_list->insn; 488 CGEN_FIELDS fields; 489 int length; 490 unsigned long insn_value_cropped; 491 492#ifdef CGEN_VALIDATE_INSN_SUPPORTED 493 /* Not needed as insn shouldn't be in hash lists if not supported. */ 494 /* Supported by this cpu? */ 495 if (! ip2k_cgen_insn_supported (cd, insn)) 496 { 497 insn_list = CGEN_DIS_NEXT_INSN (insn_list); 498 continue; 499 } 500#endif 501 502 /* Basic bit mask must be correct. */ 503 /* ??? May wish to allow target to defer this check until the extract 504 handler. */ 505 506 /* Base size may exceed this instruction's size. Extract the 507 relevant part from the buffer. */ 508 if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen && 509 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long)) 510 insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn), 511 info->endian == BFD_ENDIAN_BIG); 512 else 513 insn_value_cropped = insn_value; 514 515 if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn)) 516 == CGEN_INSN_BASE_VALUE (insn)) 517 { 518 /* Printing is handled in two passes. The first pass parses the 519 machine insn and extracts the fields. The second pass prints 520 them. */ 521 522 /* Make sure the entire insn is loaded into insn_value, if it 523 can fit. */ 524 if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) && 525 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long)) 526 { 527 unsigned long full_insn_value; 528 int rc = read_insn (cd, pc, info, buf, 529 CGEN_INSN_BITSIZE (insn) / 8, 530 & ex_info, & full_insn_value); 531 if (rc != 0) 532 return rc; 533 length = CGEN_EXTRACT_FN (cd, insn) 534 (cd, insn, &ex_info, full_insn_value, &fields, pc); 535 } 536 else 537 length = CGEN_EXTRACT_FN (cd, insn) 538 (cd, insn, &ex_info, insn_value_cropped, &fields, pc); 539 540 /* Length < 0 -> error. */ 541 if (length < 0) 542 return length; 543 if (length > 0) 544 { 545 CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length); 546 /* Length is in bits, result is in bytes. */ 547 return length / 8; 548 } 549 } 550 551 insn_list = CGEN_DIS_NEXT_INSN (insn_list); 552 } 553 554 return 0; 555} 556 557/* Default value for CGEN_PRINT_INSN. 558 The result is the size of the insn in bytes or zero for an unknown insn 559 or -1 if an error occured fetching bytes. */ 560 561#ifndef CGEN_PRINT_INSN 562#define CGEN_PRINT_INSN default_print_insn 563#endif 564 565static int 566default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info) 567{ 568 bfd_byte buf[CGEN_MAX_INSN_SIZE]; 569 int buflen; 570 int status; 571 572 /* Attempt to read the base part of the insn. */ 573 buflen = cd->base_insn_bitsize / 8; 574 status = (*info->read_memory_func) (pc, buf, buflen, info); 575 576 /* Try again with the minimum part, if min < base. */ 577 if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize)) 578 { 579 buflen = cd->min_insn_bitsize / 8; 580 status = (*info->read_memory_func) (pc, buf, buflen, info); 581 } 582 583 if (status != 0) 584 { 585 (*info->memory_error_func) (status, pc, info); 586 return -1; 587 } 588 589 return print_insn (cd, pc, info, buf, buflen); 590} 591 592/* Main entry point. 593 Print one instruction from PC on INFO->STREAM. 594 Return the size of the instruction (in bytes). */ 595 596typedef struct cpu_desc_list 597{ 598 struct cpu_desc_list *next; 599 CGEN_BITSET *isa; 600 int mach; 601 int endian; 602 CGEN_CPU_DESC cd; 603} cpu_desc_list; 604 605int 606print_insn_ip2k (bfd_vma pc, disassemble_info *info) 607{ 608 static cpu_desc_list *cd_list = 0; 609 cpu_desc_list *cl = 0; 610 static CGEN_CPU_DESC cd = 0; 611 static CGEN_BITSET *prev_isa; 612 static int prev_mach; 613 static int prev_endian; 614 int length; 615 CGEN_BITSET *isa; 616 int mach; 617 int endian = (info->endian == BFD_ENDIAN_BIG 618 ? CGEN_ENDIAN_BIG 619 : CGEN_ENDIAN_LITTLE); 620 enum bfd_architecture arch; 621 622 /* ??? gdb will set mach but leave the architecture as "unknown" */ 623#ifndef CGEN_BFD_ARCH 624#define CGEN_BFD_ARCH bfd_arch_ip2k 625#endif 626 arch = info->arch; 627 if (arch == bfd_arch_unknown) 628 arch = CGEN_BFD_ARCH; 629 630 /* There's no standard way to compute the machine or isa number 631 so we leave it to the target. */ 632#ifdef CGEN_COMPUTE_MACH 633 mach = CGEN_COMPUTE_MACH (info); 634#else 635 mach = info->mach; 636#endif 637 638#ifdef CGEN_COMPUTE_ISA 639 { 640 static CGEN_BITSET *permanent_isa; 641 642 if (!permanent_isa) 643 permanent_isa = cgen_bitset_create (MAX_ISAS); 644 isa = permanent_isa; 645 cgen_bitset_clear (isa); 646 cgen_bitset_add (isa, CGEN_COMPUTE_ISA (info)); 647 } 648#else 649 isa = info->insn_sets; 650#endif 651 652 /* If we've switched cpu's, try to find a handle we've used before */ 653 if (cd 654 && (cgen_bitset_compare (isa, prev_isa) != 0 655 || mach != prev_mach 656 || endian != prev_endian)) 657 { 658 cd = 0; 659 for (cl = cd_list; cl; cl = cl->next) 660 { 661 if (cgen_bitset_compare (cl->isa, isa) == 0 && 662 cl->mach == mach && 663 cl->endian == endian) 664 { 665 cd = cl->cd; 666 prev_isa = cd->isas; 667 break; 668 } 669 } 670 } 671 672 /* If we haven't initialized yet, initialize the opcode table. */ 673 if (! cd) 674 { 675 const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach); 676 const char *mach_name; 677 678 if (!arch_type) 679 abort (); 680 mach_name = arch_type->printable_name; 681 682 prev_isa = cgen_bitset_copy (isa); 683 prev_mach = mach; 684 prev_endian = endian; 685 cd = ip2k_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa, 686 CGEN_CPU_OPEN_BFDMACH, mach_name, 687 CGEN_CPU_OPEN_ENDIAN, prev_endian, 688 CGEN_CPU_OPEN_END); 689 if (!cd) 690 abort (); 691 692 /* Save this away for future reference. */ 693 cl = xmalloc (sizeof (struct cpu_desc_list)); 694 cl->cd = cd; 695 cl->isa = prev_isa; 696 cl->mach = mach; 697 cl->endian = endian; 698 cl->next = cd_list; 699 cd_list = cl; 700 701 ip2k_cgen_init_dis (cd); 702 } 703 704 /* We try to have as much common code as possible. 705 But at this point some targets need to take over. */ 706 /* ??? Some targets may need a hook elsewhere. Try to avoid this, 707 but if not possible try to move this hook elsewhere rather than 708 have two hooks. */ 709 length = CGEN_PRINT_INSN (cd, pc, info); 710 if (length > 0) 711 return length; 712 if (length < 0) 713 return -1; 714 715 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG); 716 return cd->default_insn_bitsize / 8; 717} 718