opcodes/ms1-dis.c

   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, 2005
   8    Free Software Foundation, Inc.
   9
  10    This file is part of the GNU Binutils and GDB, the GNU debugger.
  11
  12    This program 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 2, or (at your option)
  15    any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public 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 "ms1-desc.h"
  37 #include "ms1-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 static void print_dollarhex (CGEN_CPU_DESC, PTR, long, unsigned, bfd_vma, int);
  63
  64 static void
  65 print_dollarhex (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
  66                  void * dis_info,
  67                  long value,
  68                  unsigned int attrs ATTRIBUTE_UNUSED,
  69                  bfd_vma pc ATTRIBUTE_UNUSED,
  70                  int length ATTRIBUTE_UNUSED)
  71 {
  72   disassemble_info *info = (disassemble_info *) dis_info;
  73
  74   info->fprintf_func (info->stream, "$%lx", value);
  75
  76   if (0)
  77     print_normal (cd, dis_info, value, attrs, pc, length);
  78 }
  79
  80
  81 /* -- */
  82
  83 void ms1_cgen_print_operand
  84   (CGEN_CPU_DESC, int, PTR, CGEN_FIELDS *, void const *, bfd_vma, int);
  85
  86 /* Main entry point for printing operands.
  87    XINFO is a `void *' and not a `disassemble_info *' to not put a requirement
  88    of dis-asm.h on cgen.h.
  89
  90    This function is basically just a big switch statement.  Earlier versions
  91    used tables to look up the function to use, but
  92    - if the table contains both assembler and disassembler functions then
  93      the disassembler contains much of the assembler and vice-versa,
  94    - there's a lot of inlining possibilities as things grow,
  95    - using a switch statement avoids the function call overhead.
  96
  97    This function could be moved into `print_insn_normal', but keeping it
  98    separate makes clear the interface between `print_insn_normal' and each of
  99    the handlers.  */
 100
 101 void
 102 ms1_cgen_print_operand (CGEN_CPU_DESC cd,
 103                            int opindex,
 104                            void * xinfo,
 105                            CGEN_FIELDS *fields,
 106                            void const *attrs ATTRIBUTE_UNUSED,
 107                            bfd_vma pc,
 108                            int length)
 109 {
 110   disassemble_info *info = (disassemble_info *) xinfo;
 111
 112   switch (opindex)
 113     {
 114     case MS1_OPERAND_A23 :
 115       print_dollarhex (cd, info, fields->f_a23, 0, pc, length);
 116       break;
 117     case MS1_OPERAND_BALL :
 118       print_dollarhex (cd, info, fields->f_ball, 0, pc, length);
 119       break;
 120     case MS1_OPERAND_BALL2 :
 121       print_dollarhex (cd, info, fields->f_ball2, 0, pc, length);
 122       break;
 123     case MS1_OPERAND_BANKADDR :
 124       print_dollarhex (cd, info, fields->f_bankaddr, 0, pc, length);
 125       break;
 126     case MS1_OPERAND_BRC :
 127       print_dollarhex (cd, info, fields->f_brc, 0, pc, length);
 128       break;
 129     case MS1_OPERAND_BRC2 :
 130       print_dollarhex (cd, info, fields->f_brc2, 0, pc, length);
 131       break;
 132     case MS1_OPERAND_CBRB :
 133       print_dollarhex (cd, info, fields->f_cbrb, 0, pc, length);
 134       break;
 135     case MS1_OPERAND_CBS :
 136       print_dollarhex (cd, info, fields->f_cbs, 0, pc, length);
 137       break;
 138     case MS1_OPERAND_CBX :
 139       print_dollarhex (cd, info, fields->f_cbx, 0, pc, length);
 140       break;
 141     case MS1_OPERAND_CCB :
 142       print_dollarhex (cd, info, fields->f_ccb, 0, pc, length);
 143       break;
 144     case MS1_OPERAND_CDB :
 145       print_dollarhex (cd, info, fields->f_cdb, 0, pc, length);
 146       break;
 147     case MS1_OPERAND_CELL :
 148       print_dollarhex (cd, info, fields->f_cell, 0, pc, length);
 149       break;
 150     case MS1_OPERAND_COLNUM :
 151       print_dollarhex (cd, info, fields->f_colnum, 0, pc, length);
 152       break;
 153     case MS1_OPERAND_CONTNUM :
 154       print_dollarhex (cd, info, fields->f_contnum, 0, pc, length);
 155       break;
 156     case MS1_OPERAND_CR :
 157       print_dollarhex (cd, info, fields->f_cr, 0, pc, length);
 158       break;
 159     case MS1_OPERAND_CTXDISP :
 160       print_dollarhex (cd, info, fields->f_ctxdisp, 0, pc, length);
 161       break;
 162     case MS1_OPERAND_DUP :
 163       print_dollarhex (cd, info, fields->f_dup, 0, pc, length);
 164       break;
 165     case MS1_OPERAND_FBDISP :
 166       print_dollarhex (cd, info, fields->f_fbdisp, 0, pc, length);
 167       break;
 168     case MS1_OPERAND_FBINCR :
 169       print_dollarhex (cd, info, fields->f_fbincr, 0, pc, length);
 170       break;
 171     case MS1_OPERAND_FRDR :
 172       print_keyword (cd, info, & ms1_cgen_opval_h_spr, fields->f_dr, 0|(1<<CGEN_OPERAND_ABS_ADDR));
 173       break;
 174     case MS1_OPERAND_FRDRRR :
 175       print_keyword (cd, info, & ms1_cgen_opval_h_spr, fields->f_drrr, 0|(1<<CGEN_OPERAND_ABS_ADDR));
 176       break;
 177     case MS1_OPERAND_FRSR1 :
 178       print_keyword (cd, info, & ms1_cgen_opval_h_spr, fields->f_sr1, 0|(1<<CGEN_OPERAND_ABS_ADDR));
 179       break;
 180     case MS1_OPERAND_FRSR2 :
 181       print_keyword (cd, info, & ms1_cgen_opval_h_spr, fields->f_sr2, 0|(1<<CGEN_OPERAND_ABS_ADDR));
 182       break;
 183     case MS1_OPERAND_ID :
 184       print_dollarhex (cd, info, fields->f_id, 0, pc, length);
 185       break;
 186     case MS1_OPERAND_IMM16 :
 187       print_dollarhex (cd, info, fields->f_imm16s, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
 188       break;
 189     case MS1_OPERAND_IMM16O :
 190       print_dollarhex (cd, info, fields->f_imm16s, 0, pc, length);
 191       break;
 192     case MS1_OPERAND_IMM16Z :
 193       print_dollarhex (cd, info, fields->f_imm16u, 0, pc, length);
 194       break;
 195     case MS1_OPERAND_INCAMT :
 196       print_dollarhex (cd, info, fields->f_incamt, 0, pc, length);
 197       break;
 198     case MS1_OPERAND_INCR :
 199       print_dollarhex (cd, info, fields->f_incr, 0, pc, length);
 200       break;
 201     case MS1_OPERAND_LENGTH :
 202       print_dollarhex (cd, info, fields->f_length, 0, pc, length);
 203       break;
 204     case MS1_OPERAND_MASK :
 205       print_dollarhex (cd, info, fields->f_mask, 0, pc, length);
 206       break;
 207     case MS1_OPERAND_MASK1 :
 208       print_dollarhex (cd, info, fields->f_mask1, 0, pc, length);
 209       break;
 210     case MS1_OPERAND_MODE :
 211       print_dollarhex (cd, info, fields->f_mode, 0, pc, length);
 212       break;
 213     case MS1_OPERAND_PERM :
 214       print_dollarhex (cd, info, fields->f_perm, 0, pc, length);
 215       break;
 216     case MS1_OPERAND_RBBC :
 217       print_dollarhex (cd, info, fields->f_rbbc, 0, pc, length);
 218       break;
 219     case MS1_OPERAND_RC :
 220       print_dollarhex (cd, info, fields->f_rc, 0, pc, length);
 221       break;
 222     case MS1_OPERAND_RC1 :
 223       print_dollarhex (cd, info, fields->f_rc1, 0, pc, length);
 224       break;
 225     case MS1_OPERAND_RC2 :
 226       print_dollarhex (cd, info, fields->f_rc2, 0, pc, length);
 227       break;
 228     case MS1_OPERAND_RCNUM :
 229       print_dollarhex (cd, info, fields->f_rcnum, 0, pc, length);
 230       break;
 231     case MS1_OPERAND_RDA :
 232       print_dollarhex (cd, info, fields->f_rda, 0, pc, length);
 233       break;
 234     case MS1_OPERAND_ROWNUM :
 235       print_dollarhex (cd, info, fields->f_rownum, 0, pc, length);
 236       break;
 237     case MS1_OPERAND_ROWNUM1 :
 238       print_dollarhex (cd, info, fields->f_rownum1, 0, pc, length);
 239       break;
 240     case MS1_OPERAND_ROWNUM2 :
 241       print_dollarhex (cd, info, fields->f_rownum2, 0, pc, length);
 242       break;
 243     case MS1_OPERAND_SIZE :
 244       print_dollarhex (cd, info, fields->f_size, 0, pc, length);
 245       break;
 246     case MS1_OPERAND_TYPE :
 247       print_dollarhex (cd, info, fields->f_type, 0, pc, length);
 248       break;
 249     case MS1_OPERAND_WR :
 250       print_dollarhex (cd, info, fields->f_wr, 0, pc, length);
 251       break;
 252     case MS1_OPERAND_XMODE :
 253       print_dollarhex (cd, info, fields->f_xmode, 0, pc, length);
 254       break;
 255
 256     default :
 257       /* xgettext:c-format */
 258       fprintf (stderr, _("Unrecognized field %d while printing insn.\n"),
 259                opindex);
 260     abort ();
 261   }
 262 }
 263
 264 cgen_print_fn * const ms1_cgen_print_handlers[] =
 265 {
 266   print_insn_normal,
 267 };
 268
 269
 270 void
 271 ms1_cgen_init_dis (CGEN_CPU_DESC cd)
 272 {
 273   ms1_cgen_init_opcode_table (cd);
 274   ms1_cgen_init_ibld_table (cd);
 275   cd->print_handlers = & ms1_cgen_print_handlers[0];
 276   cd->print_operand = ms1_cgen_print_operand;
 277 }
 278
 279 \f
 280 /* Default print handler.  */
 281
 282 static void
 283 print_normal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 284               void *dis_info,
 285               long value,
 286               unsigned int attrs,
 287               bfd_vma pc ATTRIBUTE_UNUSED,
 288               int length ATTRIBUTE_UNUSED)
 289 {
 290   disassemble_info *info = (disassemble_info *) dis_info;
 291
 292 #ifdef CGEN_PRINT_NORMAL
 293   CGEN_PRINT_NORMAL (cd, info, value, attrs, pc, length);
 294 #endif
 295
 296   /* Print the operand as directed by the attributes.  */
 297   if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
 298     ; /* nothing to do */
 299   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
 300     (*info->fprintf_func) (info->stream, "%ld", value);
 301   else
 302     (*info->fprintf_func) (info->stream, "0x%lx", value);
 303 }
 304
 305 /* Default address handler.  */
 306
 307 static void
 308 print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 309                void *dis_info,
 310                bfd_vma value,
 311                unsigned int attrs,
 312                bfd_vma pc ATTRIBUTE_UNUSED,
 313                int length ATTRIBUTE_UNUSED)
 314 {
 315   disassemble_info *info = (disassemble_info *) dis_info;
 316
 317 #ifdef CGEN_PRINT_ADDRESS
 318   CGEN_PRINT_ADDRESS (cd, info, value, attrs, pc, length);
 319 #endif
 320
 321   /* Print the operand as directed by the attributes.  */
 322   if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
 323     ; /* Nothing to do.  */
 324   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
 325     (*info->print_address_func) (value, info);
 326   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
 327     (*info->print_address_func) (value, info);
 328   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
 329     (*info->fprintf_func) (info->stream, "%ld", (long) value);
 330   else
 331     (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
 332 }
 333
 334 /* Keyword print handler.  */
 335
 336 static void
 337 print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 338                void *dis_info,
 339                CGEN_KEYWORD *keyword_table,
 340                long value,
 341                unsigned int attrs ATTRIBUTE_UNUSED)
 342 {
 343   disassemble_info *info = (disassemble_info *) dis_info;
 344   const CGEN_KEYWORD_ENTRY *ke;
 345
 346   ke = cgen_keyword_lookup_value (keyword_table, value);
 347   if (ke != NULL)
 348     (*info->fprintf_func) (info->stream, "%s", ke->name);
 349   else
 350     (*info->fprintf_func) (info->stream, "???");
 351 }
 352 \f
 353 /* Default insn printer.
 354
 355    DIS_INFO is defined as `void *' so the disassembler needn't know anything
 356    about disassemble_info.  */
 357
 358 static void
 359 print_insn_normal (CGEN_CPU_DESC cd,
 360                    void *dis_info,
 361                    const CGEN_INSN *insn,
 362                    CGEN_FIELDS *fields,
 363                    bfd_vma pc,
 364                    int length)
 365 {
 366   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 367   disassemble_info *info = (disassemble_info *) dis_info;
 368   const CGEN_SYNTAX_CHAR_TYPE *syn;
 369
 370   CGEN_INIT_PRINT (cd);
 371
 372   for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
 373     {
 374       if (CGEN_SYNTAX_MNEMONIC_P (*syn))
 375         {
 376           (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
 377           continue;
 378         }
 379       if (CGEN_SYNTAX_CHAR_P (*syn))
 380         {
 381           (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
 382           continue;
 383         }
 384
 385       /* We have an operand.  */
 386       ms1_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
 387                                  fields, CGEN_INSN_ATTRS (insn), pc, length);
 388     }
 389 }
 390 \f
 391 /* Subroutine of print_insn. Reads an insn into the given buffers and updates
 392    the extract info.
 393    Returns 0 if all is well, non-zero otherwise.  */
 394
 395 static int
 396 read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 397            bfd_vma pc,
 398            disassemble_info *info,
 399            bfd_byte *buf,
 400            int buflen,
 401            CGEN_EXTRACT_INFO *ex_info,
 402            unsigned long *insn_value)
 403 {
 404   int status = (*info->read_memory_func) (pc, buf, buflen, info);
 405
 406   if (status != 0)
 407     {
 408       (*info->memory_error_func) (status, pc, info);
 409       return -1;
 410     }
 411
 412   ex_info->dis_info = info;
 413   ex_info->valid = (1 << buflen) - 1;
 414   ex_info->insn_bytes = buf;
 415
 416   *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
 417   return 0;
 418 }
 419
 420 /* Utility to print an insn.
 421    BUF is the base part of the insn, target byte order, BUFLEN bytes long.
 422    The result is the size of the insn in bytes or zero for an unknown insn
 423    or -1 if an error occurs fetching data (memory_error_func will have
 424    been called).  */
 425
 426 static int
 427 print_insn (CGEN_CPU_DESC cd,
 428             bfd_vma pc,
 429             disassemble_info *info,
 430             bfd_byte *buf,
 431             unsigned int buflen)
 432 {
 433   CGEN_INSN_INT insn_value;
 434   const CGEN_INSN_LIST *insn_list;
 435   CGEN_EXTRACT_INFO ex_info;
 436   int basesize;
 437
 438   /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
 439   basesize = cd->base_insn_bitsize < buflen * 8 ?
 440                                      cd->base_insn_bitsize : buflen * 8;
 441   insn_value = cgen_get_insn_value (cd, buf, basesize);
 442
 443
 444   /* Fill in ex_info fields like read_insn would.  Don't actually call
 445      read_insn, since the incoming buffer is already read (and possibly
 446      modified a la m32r).  */
 447   ex_info.valid = (1 << buflen) - 1;
 448   ex_info.dis_info = info;
 449   ex_info.insn_bytes = buf;
 450
 451   /* The instructions are stored in hash lists.
 452      Pick the first one and keep trying until we find the right one.  */
 453
 454   insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value);
 455   while (insn_list != NULL)
 456     {
 457       const CGEN_INSN *insn = insn_list->insn;
 458       CGEN_FIELDS fields;
 459       int length;
 460       unsigned long insn_value_cropped;
 461
 462 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
 463       /* Not needed as insn shouldn't be in hash lists if not supported.  */
 464       /* Supported by this cpu?  */
 465       if (! ms1_cgen_insn_supported (cd, insn))
 466         {
 467           insn_list = CGEN_DIS_NEXT_INSN (insn_list);
 468           continue;
 469         }
 470 #endif
 471
 472       /* Basic bit mask must be correct.  */
 473       /* ??? May wish to allow target to defer this check until the extract
 474          handler.  */
 475
 476       /* Base size may exceed this instruction's size.  Extract the
 477          relevant part from the buffer. */
 478       if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
 479           (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
 480         insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
 481                                            info->endian == BFD_ENDIAN_BIG);
 482       else
 483         insn_value_cropped = insn_value;
 484
 485       if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
 486           == CGEN_INSN_BASE_VALUE (insn))
 487         {
 488           /* Printing is handled in two passes.  The first pass parses the
 489              machine insn and extracts the fields.  The second pass prints
 490              them.  */
 491
 492           /* Make sure the entire insn is loaded into insn_value, if it
 493              can fit.  */
 494           if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) &&
 495               (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
 496             {
 497               unsigned long full_insn_value;
 498               int rc = read_insn (cd, pc, info, buf,
 499                                   CGEN_INSN_BITSIZE (insn) / 8,
 500                                   & ex_info, & full_insn_value);
 501               if (rc != 0)
 502                 return rc;
 503               length = CGEN_EXTRACT_FN (cd, insn)
 504                 (cd, insn, &ex_info, full_insn_value, &fields, pc);
 505             }
 506           else
 507             length = CGEN_EXTRACT_FN (cd, insn)
 508               (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
 509
 510           /* Length < 0 -> error.  */
 511           if (length < 0)
 512             return length;
 513           if (length > 0)
 514             {
 515               CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
 516               /* Length is in bits, result is in bytes.  */
 517               return length / 8;
 518             }
 519         }
 520
 521       insn_list = CGEN_DIS_NEXT_INSN (insn_list);
 522     }
 523
 524   return 0;
 525 }
 526
 527 /* Default value for CGEN_PRINT_INSN.
 528    The result is the size of the insn in bytes or zero for an unknown insn
 529    or -1 if an error occured fetching bytes.  */
 530
 531 #ifndef CGEN_PRINT_INSN
 532 #define CGEN_PRINT_INSN default_print_insn
 533 #endif
 534
 535 static int
 536 default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info)
 537 {
 538   bfd_byte buf[CGEN_MAX_INSN_SIZE];
 539   int buflen;
 540   int status;
 541
 542   /* Attempt to read the base part of the insn.  */
 543   buflen = cd->base_insn_bitsize / 8;
 544   status = (*info->read_memory_func) (pc, buf, buflen, info);
 545
 546   /* Try again with the minimum part, if min < base.  */
 547   if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
 548     {
 549       buflen = cd->min_insn_bitsize / 8;
 550       status = (*info->read_memory_func) (pc, buf, buflen, info);
 551     }
 552
 553   if (status != 0)
 554     {
 555       (*info->memory_error_func) (status, pc, info);
 556       return -1;
 557     }
 558
 559   return print_insn (cd, pc, info, buf, buflen);
 560 }
 561
 562 /* Main entry point.
 563    Print one instruction from PC on INFO->STREAM.
 564    Return the size of the instruction (in bytes).  */
 565
 566 typedef struct cpu_desc_list
 567 {
 568   struct cpu_desc_list *next;
 569   int isa;
 570   int mach;
 571   int endian;
 572   CGEN_CPU_DESC cd;
 573 } cpu_desc_list;
 574
 575 int
 576 print_insn_ms1 (bfd_vma pc, disassemble_info *info)
 577 {
 578   static cpu_desc_list *cd_list = 0;
 579   cpu_desc_list *cl = 0;
 580   static CGEN_CPU_DESC cd = 0;
 581   static int prev_isa;
 582   static int prev_mach;
 583   static int prev_endian;
 584   int length;
 585   int isa,mach;
 586   int endian = (info->endian == BFD_ENDIAN_BIG
 587                 ? CGEN_ENDIAN_BIG
 588                 : CGEN_ENDIAN_LITTLE);
 589   enum bfd_architecture arch;
 590
 591   /* ??? gdb will set mach but leave the architecture as "unknown" */
 592 #ifndef CGEN_BFD_ARCH
 593 #define CGEN_BFD_ARCH bfd_arch_ms1
 594 #endif
 595   arch = info->arch;
 596   if (arch == bfd_arch_unknown)
 597     arch = CGEN_BFD_ARCH;
 598
 599   /* There's no standard way to compute the machine or isa number
 600      so we leave it to the target.  */
 601 #ifdef CGEN_COMPUTE_MACH
 602   mach = CGEN_COMPUTE_MACH (info);
 603 #else
 604   mach = info->mach;
 605 #endif
 606
 607 #ifdef CGEN_COMPUTE_ISA
 608   isa = CGEN_COMPUTE_ISA (info);
 609 #else
 610   isa = info->insn_sets;
 611 #endif
 612
 613   /* If we've switched cpu's, try to find a handle we've used before */
 614   if (cd
 615       && (isa != prev_isa
 616           || mach != prev_mach
 617           || endian != prev_endian))
 618     {
 619       cd = 0;
 620       for (cl = cd_list; cl; cl = cl->next)
 621         {
 622           if (cl->isa == isa &&
 623               cl->mach == mach &&
 624               cl->endian == endian)
 625             {
 626               cd = cl->cd;
 627               break;
 628             }
 629         }
 630     }
 631
 632   /* If we haven't initialized yet, initialize the opcode table.  */
 633   if (! cd)
 634     {
 635       const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
 636       const char *mach_name;
 637
 638       if (!arch_type)
 639         abort ();
 640       mach_name = arch_type->printable_name;
 641
 642       prev_isa = isa;
 643       prev_mach = mach;
 644       prev_endian = endian;
 645       cd = ms1_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
 646                                  CGEN_CPU_OPEN_BFDMACH, mach_name,
 647                                  CGEN_CPU_OPEN_ENDIAN, prev_endian,
 648                                  CGEN_CPU_OPEN_END);
 649       if (!cd)
 650         abort ();
 651
 652       /* Save this away for future reference.  */
 653       cl = xmalloc (sizeof (struct cpu_desc_list));
 654       cl->cd = cd;
 655       cl->isa = isa;
 656       cl->mach = mach;
 657       cl->endian = endian;
 658       cl->next = cd_list;
 659       cd_list = cl;
 660
 661       ms1_cgen_init_dis (cd);
 662     }
 663
 664   /* We try to have as much common code as possible.
 665      But at this point some targets need to take over.  */
 666   /* ??? Some targets may need a hook elsewhere.  Try to avoid this,
 667      but if not possible try to move this hook elsewhere rather than
 668      have two hooks.  */
 669   length = CGEN_PRINT_INSN (cd, pc, info);
 670   if (length > 0)
 671     return length;
 672   if (length < 0)
 673     return -1;
 674
 675   (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
 676   return cd->default_insn_bitsize / 8;
 677 }