opcodes/ip2k-dis.c

   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) 1996-2024 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 \f
  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, void *, 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       opcodes_error_handler
 289         (_("internal error: unrecognized field %d while printing insn"),
 290          opindex);
 291       abort ();
 292   }
 293 }
 294
 295 cgen_print_fn * const ip2k_cgen_print_handlers[] =
 296 {
 297   print_insn_normal,
 298 };
 299
 300
 301 void
 302 ip2k_cgen_init_dis (CGEN_CPU_DESC cd)
 303 {
 304   ip2k_cgen_init_opcode_table (cd);
 305   ip2k_cgen_init_ibld_table (cd);
 306   cd->print_handlers = & ip2k_cgen_print_handlers[0];
 307   cd->print_operand = ip2k_cgen_print_operand;
 308 }
 309
 310 \f
 311 /* Default print handler.  */
 312
 313 static void
 314 print_normal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 315               void *dis_info,
 316               long value,
 317               unsigned int attrs,
 318               bfd_vma pc ATTRIBUTE_UNUSED,
 319               int length ATTRIBUTE_UNUSED)
 320 {
 321   disassemble_info *info = (disassemble_info *) dis_info;
 322
 323   /* Print the operand as directed by the attributes.  */
 324   if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
 325     ; /* nothing to do */
 326   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
 327     (*info->fprintf_func) (info->stream, "%ld", value);
 328   else
 329     (*info->fprintf_func) (info->stream, "0x%lx", value);
 330 }
 331
 332 /* Default address handler.  */
 333
 334 static void
 335 print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 336                void *dis_info,
 337                bfd_vma value,
 338                unsigned int attrs,
 339                bfd_vma pc ATTRIBUTE_UNUSED,
 340                int length ATTRIBUTE_UNUSED)
 341 {
 342   disassemble_info *info = (disassemble_info *) dis_info;
 343
 344   /* Print the operand as directed by the attributes.  */
 345   if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
 346     ; /* Nothing to do.  */
 347   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
 348     (*info->print_address_func) (value, info);
 349   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
 350     (*info->print_address_func) (value, info);
 351   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
 352     (*info->fprintf_func) (info->stream, "%ld", (long) value);
 353   else
 354     (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
 355 }
 356
 357 /* Keyword print handler.  */
 358
 359 static void
 360 print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 361                void *dis_info,
 362                CGEN_KEYWORD *keyword_table,
 363                long value,
 364                unsigned int attrs ATTRIBUTE_UNUSED)
 365 {
 366   disassemble_info *info = (disassemble_info *) dis_info;
 367   const CGEN_KEYWORD_ENTRY *ke;
 368
 369   ke = cgen_keyword_lookup_value (keyword_table, value);
 370   if (ke != NULL)
 371     (*info->fprintf_func) (info->stream, "%s", ke->name);
 372   else
 373     (*info->fprintf_func) (info->stream, "???");
 374 }
 375 \f
 376 /* Default insn printer.
 377
 378    DIS_INFO is defined as `void *' so the disassembler needn't know anything
 379    about disassemble_info.  */
 380
 381 static void
 382 print_insn_normal (CGEN_CPU_DESC cd,
 383                    void *dis_info,
 384                    const CGEN_INSN *insn,
 385                    CGEN_FIELDS *fields,
 386                    bfd_vma pc,
 387                    int length)
 388 {
 389   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 390   disassemble_info *info = (disassemble_info *) dis_info;
 391   const CGEN_SYNTAX_CHAR_TYPE *syn;
 392
 393   CGEN_INIT_PRINT (cd);
 394
 395   for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
 396     {
 397       if (CGEN_SYNTAX_MNEMONIC_P (*syn))
 398         {
 399           (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
 400           continue;
 401         }
 402       if (CGEN_SYNTAX_CHAR_P (*syn))
 403         {
 404           (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
 405           continue;
 406         }
 407
 408       /* We have an operand.  */
 409       ip2k_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
 410                                  fields, CGEN_INSN_ATTRS (insn), pc, length);
 411     }
 412 }
 413 \f
 414 /* Subroutine of print_insn. Reads an insn into the given buffers and updates
 415    the extract info.
 416    Returns 0 if all is well, non-zero otherwise.  */
 417
 418 static int
 419 read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 420            bfd_vma pc,
 421            disassemble_info *info,
 422            bfd_byte *buf,
 423            int buflen,
 424            CGEN_EXTRACT_INFO *ex_info,
 425            unsigned long *insn_value)
 426 {
 427   int status = (*info->read_memory_func) (pc, buf, buflen, info);
 428
 429   if (status != 0)
 430     {
 431       (*info->memory_error_func) (status, pc, info);
 432       return -1;
 433     }
 434
 435   ex_info->dis_info = info;
 436   ex_info->valid = (1 << buflen) - 1;
 437   ex_info->insn_bytes = buf;
 438
 439   *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
 440   return 0;
 441 }
 442
 443 /* Utility to print an insn.
 444    BUF is the base part of the insn, target byte order, BUFLEN bytes long.
 445    The result is the size of the insn in bytes or zero for an unknown insn
 446    or -1 if an error occurs fetching data (memory_error_func will have
 447    been called).  */
 448
 449 static int
 450 print_insn (CGEN_CPU_DESC cd,
 451             bfd_vma pc,
 452             disassemble_info *info,
 453             bfd_byte *buf,
 454             unsigned int buflen)
 455 {
 456   CGEN_INSN_INT insn_value;
 457   const CGEN_INSN_LIST *insn_list;
 458   CGEN_EXTRACT_INFO ex_info;
 459   int basesize;
 460
 461   /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
 462   basesize = cd->base_insn_bitsize < buflen * 8 ?
 463                                      cd->base_insn_bitsize : buflen * 8;
 464   insn_value = cgen_get_insn_value (cd, buf, basesize, cd->insn_endian);
 465
 466
 467   /* Fill in ex_info fields like read_insn would.  Don't actually call
 468      read_insn, since the incoming buffer is already read (and possibly
 469      modified a la m32r).  */
 470   ex_info.valid = (1 << buflen) - 1;
 471   ex_info.dis_info = info;
 472   ex_info.insn_bytes = buf;
 473
 474   /* The instructions are stored in hash lists.
 475      Pick the first one and keep trying until we find the right one.  */
 476
 477   insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value);
 478   while (insn_list != NULL)
 479     {
 480       const CGEN_INSN *insn = insn_list->insn;
 481       CGEN_FIELDS fields;
 482       int length;
 483       unsigned long insn_value_cropped;
 484
 485 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
 486       /* Not needed as insn shouldn't be in hash lists if not supported.  */
 487       /* Supported by this cpu?  */
 488       if (! ip2k_cgen_insn_supported (cd, insn))
 489         {
 490           insn_list = CGEN_DIS_NEXT_INSN (insn_list);
 491           continue;
 492         }
 493 #endif
 494
 495       /* Basic bit mask must be correct.  */
 496       /* ??? May wish to allow target to defer this check until the extract
 497          handler.  */
 498
 499       /* Base size may exceed this instruction's size.  Extract the
 500          relevant part from the buffer. */
 501       if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
 502           (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
 503         insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
 504                                            info->endian == BFD_ENDIAN_BIG);
 505       else
 506         insn_value_cropped = insn_value;
 507
 508       if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
 509           == CGEN_INSN_BASE_VALUE (insn))
 510         {
 511           /* Printing is handled in two passes.  The first pass parses the
 512              machine insn and extracts the fields.  The second pass prints
 513              them.  */
 514
 515           /* Make sure the entire insn is loaded into insn_value, if it
 516              can fit.  */
 517           if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) &&
 518               (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
 519             {
 520               unsigned long full_insn_value;
 521               int rc = read_insn (cd, pc, info, buf,
 522                                   CGEN_INSN_BITSIZE (insn) / 8,
 523                                   & ex_info, & full_insn_value);
 524               if (rc != 0)
 525                 return rc;
 526               length = CGEN_EXTRACT_FN (cd, insn)
 527                 (cd, insn, &ex_info, full_insn_value, &fields, pc);
 528             }
 529           else
 530             length = CGEN_EXTRACT_FN (cd, insn)
 531               (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
 532
 533           /* Length < 0 -> error.  */
 534           if (length < 0)
 535             return length;
 536           if (length > 0)
 537             {
 538               CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
 539               /* Length is in bits, result is in bytes.  */
 540               return length / 8;
 541             }
 542         }
 543
 544       insn_list = CGEN_DIS_NEXT_INSN (insn_list);
 545     }
 546
 547   return 0;
 548 }
 549
 550 /* Default value for CGEN_PRINT_INSN.
 551    The result is the size of the insn in bytes or zero for an unknown insn
 552    or -1 if an error occured fetching bytes.  */
 553
 554 #ifndef CGEN_PRINT_INSN
 555 #define CGEN_PRINT_INSN default_print_insn
 556 #endif
 557
 558 static int
 559 default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info)
 560 {
 561   bfd_byte buf[CGEN_MAX_INSN_SIZE];
 562   int buflen;
 563   int status;
 564
 565   /* Attempt to read the base part of the insn.  */
 566   buflen = cd->base_insn_bitsize / 8;
 567   status = (*info->read_memory_func) (pc, buf, buflen, info);
 568
 569   /* Try again with the minimum part, if min < base.  */
 570   if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
 571     {
 572       buflen = cd->min_insn_bitsize / 8;
 573       status = (*info->read_memory_func) (pc, buf, buflen, info);
 574     }
 575
 576   if (status != 0)
 577     {
 578       (*info->memory_error_func) (status, pc, info);
 579       return -1;
 580     }
 581
 582   return print_insn (cd, pc, info, buf, buflen);
 583 }
 584
 585 /* Main entry point.
 586    Print one instruction from PC on INFO->STREAM.
 587    Return the size of the instruction (in bytes).  */
 588
 589 typedef struct cpu_desc_list
 590 {
 591   struct cpu_desc_list *next;
 592   CGEN_BITSET *isa;
 593   int mach;
 594   int endian;
 595   int insn_endian;
 596   CGEN_CPU_DESC cd;
 597 } cpu_desc_list;
 598
 599 int
 600 print_insn_ip2k (bfd_vma pc, disassemble_info *info)
 601 {
 602   static cpu_desc_list *cd_list = 0;
 603   cpu_desc_list *cl = 0;
 604   static CGEN_CPU_DESC cd = 0;
 605   static CGEN_BITSET *prev_isa;
 606   static int prev_mach;
 607   static int prev_endian;
 608   static int prev_insn_endian;
 609   int length;
 610   CGEN_BITSET *isa;
 611   int mach;
 612   int endian = (info->endian == BFD_ENDIAN_BIG
 613                 ? CGEN_ENDIAN_BIG
 614                 : CGEN_ENDIAN_LITTLE);
 615   int insn_endian = (info->endian_code == BFD_ENDIAN_BIG
 616                      ? CGEN_ENDIAN_BIG
 617                      : CGEN_ENDIAN_LITTLE);
 618   enum bfd_architecture arch;
 619
 620   /* ??? gdb will set mach but leave the architecture as "unknown" */
 621 #ifndef CGEN_BFD_ARCH
 622 #define CGEN_BFD_ARCH bfd_arch_ip2k
 623 #endif
 624   arch = info->arch;
 625   if (arch == bfd_arch_unknown)
 626     arch = CGEN_BFD_ARCH;
 627
 628   /* There's no standard way to compute the machine or isa number
 629      so we leave it to the target.  */
 630 #ifdef CGEN_COMPUTE_MACH
 631   mach = CGEN_COMPUTE_MACH (info);
 632 #else
 633   mach = info->mach;
 634 #endif
 635
 636 #ifdef CGEN_COMPUTE_ISA
 637   {
 638     static CGEN_BITSET *permanent_isa;
 639
 640     if (!permanent_isa)
 641       permanent_isa = cgen_bitset_create (MAX_ISAS);
 642     isa = permanent_isa;
 643     cgen_bitset_clear (isa);
 644     cgen_bitset_add (isa, CGEN_COMPUTE_ISA (info));
 645   }
 646 #else
 647   isa = info->private_data;
 648 #endif
 649
 650   /* If we've switched cpu's, try to find a handle we've used before */
 651   if (cd
 652       && (cgen_bitset_compare (isa, prev_isa) != 0
 653           || mach != prev_mach
 654           || endian != prev_endian))
 655     {
 656       cd = 0;
 657       for (cl = cd_list; cl; cl = cl->next)
 658         {
 659           if (cgen_bitset_compare (cl->isa, isa) == 0 &&
 660               cl->mach == mach &&
 661               cl->endian == endian)
 662             {
 663               cd = cl->cd;
 664               prev_isa = cd->isas;
 665               break;
 666             }
 667         }
 668     }
 669
 670   /* If we haven't initialized yet, initialize the opcode table.  */
 671   if (! cd)
 672     {
 673       const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
 674       const char *mach_name;
 675
 676       if (!arch_type)
 677         abort ();
 678       mach_name = arch_type->printable_name;
 679
 680       prev_isa = cgen_bitset_copy (isa);
 681       prev_mach = mach;
 682       prev_endian = endian;
 683       prev_insn_endian = insn_endian;
 684       cd = ip2k_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
 685                                  CGEN_CPU_OPEN_BFDMACH, mach_name,
 686                                  CGEN_CPU_OPEN_ENDIAN, prev_endian,
 687                                  CGEN_CPU_OPEN_INSN_ENDIAN, prev_insn_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 }