opcodes/fr30-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, 2003, 2005, 2007,
   8    2008, 2010  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 "fr30-desc.h"
  37 #include "fr30-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
  63 print_register_list (void * dis_info,
  64                      long value,
  65                      long offset,
  66                      int load_store) /* 0 == load, 1 == store.  */
  67 {
  68   disassemble_info *info = dis_info;
  69   int mask;
  70   int reg_index = 0;
  71   char * comma = "";
  72
  73   if (load_store)
  74     mask = 0x80;
  75   else
  76     mask = 1;
  77
  78   if (value & mask)
  79     {
  80       (*info->fprintf_func) (info->stream, "r%li", reg_index + offset);
  81       comma = ",";
  82     }
  83
  84   for (reg_index = 1; reg_index <= 7; ++reg_index)
  85     {
  86       if (load_store)
  87         mask >>= 1;
  88       else
  89         mask <<= 1;
  90
  91       if (value & mask)
  92         {
  93           (*info->fprintf_func) (info->stream, "%sr%li", comma, reg_index + offset);
  94           comma = ",";
  95         }
  96     }
  97 }
  98
  99 static void
 100 print_hi_register_list_ld (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 101                            void * dis_info,
 102                            long value,
 103                            unsigned int attrs ATTRIBUTE_UNUSED,
 104                            bfd_vma pc ATTRIBUTE_UNUSED,
 105                            int length ATTRIBUTE_UNUSED)
 106 {
 107   print_register_list (dis_info, value, 8, 0 /* Load.  */);
 108 }
 109
 110 static void
 111 print_low_register_list_ld (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 112                             void * dis_info,
 113                             long value,
 114                             unsigned int attrs ATTRIBUTE_UNUSED,
 115                             bfd_vma pc ATTRIBUTE_UNUSED,
 116                             int length ATTRIBUTE_UNUSED)
 117 {
 118   print_register_list (dis_info, value, 0, 0 /* Load.  */);
 119 }
 120
 121 static void
 122 print_hi_register_list_st (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 123                            void * dis_info,
 124                            long value,
 125                            unsigned int attrs ATTRIBUTE_UNUSED,
 126                            bfd_vma pc ATTRIBUTE_UNUSED,
 127                            int length ATTRIBUTE_UNUSED)
 128 {
 129   print_register_list (dis_info, value, 8, 1 /* Store.  */);
 130 }
 131
 132 static void
 133 print_low_register_list_st (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 134                             void * dis_info,
 135                             long value,
 136                             unsigned int attrs ATTRIBUTE_UNUSED,
 137                             bfd_vma pc ATTRIBUTE_UNUSED,
 138                             int length ATTRIBUTE_UNUSED)
 139 {
 140   print_register_list (dis_info, value, 0, 1 /* Store.  */);
 141 }
 142
 143 static void
 144 print_m4 (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 145           void * dis_info,
 146           long value,
 147           unsigned int attrs ATTRIBUTE_UNUSED,
 148           bfd_vma pc ATTRIBUTE_UNUSED,
 149           int length ATTRIBUTE_UNUSED)
 150 {
 151   disassemble_info *info = (disassemble_info *) dis_info;
 152
 153   (*info->fprintf_func) (info->stream, "%ld", value);
 154 }
 155 /* -- */
 156
 157 void fr30_cgen_print_operand
 158   (CGEN_CPU_DESC, int, PTR, CGEN_FIELDS *, void const *, bfd_vma, int);
 159
 160 /* Main entry point for printing operands.
 161    XINFO is a `void *' and not a `disassemble_info *' to not put a requirement
 162    of dis-asm.h on cgen.h.
 163
 164    This function is basically just a big switch statement.  Earlier versions
 165    used tables to look up the function to use, but
 166    - if the table contains both assembler and disassembler functions then
 167      the disassembler contains much of the assembler and vice-versa,
 168    - there's a lot of inlining possibilities as things grow,
 169    - using a switch statement avoids the function call overhead.
 170
 171    This function could be moved into `print_insn_normal', but keeping it
 172    separate makes clear the interface between `print_insn_normal' and each of
 173    the handlers.  */
 174
 175 void
 176 fr30_cgen_print_operand (CGEN_CPU_DESC cd,
 177                            int opindex,
 178                            void * xinfo,
 179                            CGEN_FIELDS *fields,
 180                            void const *attrs ATTRIBUTE_UNUSED,
 181                            bfd_vma pc,
 182                            int length)
 183 {
 184   disassemble_info *info = (disassemble_info *) xinfo;
 185
 186   switch (opindex)
 187     {
 188     case FR30_OPERAND_CRI :
 189       print_keyword (cd, info, & fr30_cgen_opval_cr_names, fields->f_CRi, 0);
 190       break;
 191     case FR30_OPERAND_CRJ :
 192       print_keyword (cd, info, & fr30_cgen_opval_cr_names, fields->f_CRj, 0);
 193       break;
 194     case FR30_OPERAND_R13 :
 195       print_keyword (cd, info, & fr30_cgen_opval_h_r13, 0, 0);
 196       break;
 197     case FR30_OPERAND_R14 :
 198       print_keyword (cd, info, & fr30_cgen_opval_h_r14, 0, 0);
 199       break;
 200     case FR30_OPERAND_R15 :
 201       print_keyword (cd, info, & fr30_cgen_opval_h_r15, 0, 0);
 202       break;
 203     case FR30_OPERAND_RI :
 204       print_keyword (cd, info, & fr30_cgen_opval_gr_names, fields->f_Ri, 0);
 205       break;
 206     case FR30_OPERAND_RIC :
 207       print_keyword (cd, info, & fr30_cgen_opval_gr_names, fields->f_Ric, 0);
 208       break;
 209     case FR30_OPERAND_RJ :
 210       print_keyword (cd, info, & fr30_cgen_opval_gr_names, fields->f_Rj, 0);
 211       break;
 212     case FR30_OPERAND_RJC :
 213       print_keyword (cd, info, & fr30_cgen_opval_gr_names, fields->f_Rjc, 0);
 214       break;
 215     case FR30_OPERAND_RS1 :
 216       print_keyword (cd, info, & fr30_cgen_opval_dr_names, fields->f_Rs1, 0);
 217       break;
 218     case FR30_OPERAND_RS2 :
 219       print_keyword (cd, info, & fr30_cgen_opval_dr_names, fields->f_Rs2, 0);
 220       break;
 221     case FR30_OPERAND_CC :
 222       print_normal (cd, info, fields->f_cc, 0, pc, length);
 223       break;
 224     case FR30_OPERAND_CCC :
 225       print_normal (cd, info, fields->f_ccc, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 226       break;
 227     case FR30_OPERAND_DIR10 :
 228       print_normal (cd, info, fields->f_dir10, 0, pc, length);
 229       break;
 230     case FR30_OPERAND_DIR8 :
 231       print_normal (cd, info, fields->f_dir8, 0, pc, length);
 232       break;
 233     case FR30_OPERAND_DIR9 :
 234       print_normal (cd, info, fields->f_dir9, 0, pc, length);
 235       break;
 236     case FR30_OPERAND_DISP10 :
 237       print_normal (cd, info, fields->f_disp10, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 238       break;
 239     case FR30_OPERAND_DISP8 :
 240       print_normal (cd, info, fields->f_disp8, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 241       break;
 242     case FR30_OPERAND_DISP9 :
 243       print_normal (cd, info, fields->f_disp9, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 244       break;
 245     case FR30_OPERAND_I20 :
 246       print_normal (cd, info, fields->f_i20, 0|(1<<CGEN_OPERAND_HASH_PREFIX)|(1<<CGEN_OPERAND_VIRTUAL), pc, length);
 247       break;
 248     case FR30_OPERAND_I32 :
 249       print_normal (cd, info, fields->f_i32, 0|(1<<CGEN_OPERAND_HASH_PREFIX)|(1<<CGEN_OPERAND_SIGN_OPT), pc, length);
 250       break;
 251     case FR30_OPERAND_I8 :
 252       print_normal (cd, info, fields->f_i8, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 253       break;
 254     case FR30_OPERAND_LABEL12 :
 255       print_address (cd, info, fields->f_rel12, 0|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
 256       break;
 257     case FR30_OPERAND_LABEL9 :
 258       print_address (cd, info, fields->f_rel9, 0|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
 259       break;
 260     case FR30_OPERAND_M4 :
 261       print_m4 (cd, info, fields->f_m4, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 262       break;
 263     case FR30_OPERAND_PS :
 264       print_keyword (cd, info, & fr30_cgen_opval_h_ps, 0, 0);
 265       break;
 266     case FR30_OPERAND_REGLIST_HI_LD :
 267       print_hi_register_list_ld (cd, info, fields->f_reglist_hi_ld, 0, pc, length);
 268       break;
 269     case FR30_OPERAND_REGLIST_HI_ST :
 270       print_hi_register_list_st (cd, info, fields->f_reglist_hi_st, 0, pc, length);
 271       break;
 272     case FR30_OPERAND_REGLIST_LOW_LD :
 273       print_low_register_list_ld (cd, info, fields->f_reglist_low_ld, 0, pc, length);
 274       break;
 275     case FR30_OPERAND_REGLIST_LOW_ST :
 276       print_low_register_list_st (cd, info, fields->f_reglist_low_st, 0, pc, length);
 277       break;
 278     case FR30_OPERAND_S10 :
 279       print_normal (cd, info, fields->f_s10, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 280       break;
 281     case FR30_OPERAND_U10 :
 282       print_normal (cd, info, fields->f_u10, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 283       break;
 284     case FR30_OPERAND_U4 :
 285       print_normal (cd, info, fields->f_u4, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 286       break;
 287     case FR30_OPERAND_U4C :
 288       print_normal (cd, info, fields->f_u4c, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 289       break;
 290     case FR30_OPERAND_U8 :
 291       print_normal (cd, info, fields->f_u8, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 292       break;
 293     case FR30_OPERAND_UDISP6 :
 294       print_normal (cd, info, fields->f_udisp6, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 295       break;
 296
 297     default :
 298       /* xgettext:c-format */
 299       fprintf (stderr, _("Unrecognized field %d while printing insn.\n"),
 300                opindex);
 301     abort ();
 302   }
 303 }
 304
 305 cgen_print_fn * const fr30_cgen_print_handlers[] =
 306 {
 307   print_insn_normal,
 308 };
 309
 310
 311 void
 312 fr30_cgen_init_dis (CGEN_CPU_DESC cd)
 313 {
 314   fr30_cgen_init_opcode_table (cd);
 315   fr30_cgen_init_ibld_table (cd);
 316   cd->print_handlers = & fr30_cgen_print_handlers[0];
 317   cd->print_operand = fr30_cgen_print_operand;
 318 }
 319
 320 \f
 321 /* Default print handler.  */
 322
 323 static void
 324 print_normal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 325               void *dis_info,
 326               long value,
 327               unsigned int attrs,
 328               bfd_vma pc ATTRIBUTE_UNUSED,
 329               int length ATTRIBUTE_UNUSED)
 330 {
 331   disassemble_info *info = (disassemble_info *) dis_info;
 332
 333   /* Print the operand as directed by the attributes.  */
 334   if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
 335     ; /* nothing to do */
 336   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
 337     (*info->fprintf_func) (info->stream, "%ld", value);
 338   else
 339     (*info->fprintf_func) (info->stream, "0x%lx", value);
 340 }
 341
 342 /* Default address handler.  */
 343
 344 static void
 345 print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 346                void *dis_info,
 347                bfd_vma value,
 348                unsigned int attrs,
 349                bfd_vma pc ATTRIBUTE_UNUSED,
 350                int length ATTRIBUTE_UNUSED)
 351 {
 352   disassemble_info *info = (disassemble_info *) dis_info;
 353
 354   /* Print the operand as directed by the attributes.  */
 355   if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
 356     ; /* Nothing to do.  */
 357   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
 358     (*info->print_address_func) (value, info);
 359   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
 360     (*info->print_address_func) (value, info);
 361   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
 362     (*info->fprintf_func) (info->stream, "%ld", (long) value);
 363   else
 364     (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
 365 }
 366
 367 /* Keyword print handler.  */
 368
 369 static void
 370 print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 371                void *dis_info,
 372                CGEN_KEYWORD *keyword_table,
 373                long value,
 374                unsigned int attrs ATTRIBUTE_UNUSED)
 375 {
 376   disassemble_info *info = (disassemble_info *) dis_info;
 377   const CGEN_KEYWORD_ENTRY *ke;
 378
 379   ke = cgen_keyword_lookup_value (keyword_table, value);
 380   if (ke != NULL)
 381     (*info->fprintf_func) (info->stream, "%s", ke->name);
 382   else
 383     (*info->fprintf_func) (info->stream, "???");
 384 }
 385 \f
 386 /* Default insn printer.
 387
 388    DIS_INFO is defined as `void *' so the disassembler needn't know anything
 389    about disassemble_info.  */
 390
 391 static void
 392 print_insn_normal (CGEN_CPU_DESC cd,
 393                    void *dis_info,
 394                    const CGEN_INSN *insn,
 395                    CGEN_FIELDS *fields,
 396                    bfd_vma pc,
 397                    int length)
 398 {
 399   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 400   disassemble_info *info = (disassemble_info *) dis_info;
 401   const CGEN_SYNTAX_CHAR_TYPE *syn;
 402
 403   CGEN_INIT_PRINT (cd);
 404
 405   for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
 406     {
 407       if (CGEN_SYNTAX_MNEMONIC_P (*syn))
 408         {
 409           (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
 410           continue;
 411         }
 412       if (CGEN_SYNTAX_CHAR_P (*syn))
 413         {
 414           (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
 415           continue;
 416         }
 417
 418       /* We have an operand.  */
 419       fr30_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
 420                                  fields, CGEN_INSN_ATTRS (insn), pc, length);
 421     }
 422 }
 423 \f
 424 /* Subroutine of print_insn. Reads an insn into the given buffers and updates
 425    the extract info.
 426    Returns 0 if all is well, non-zero otherwise.  */
 427
 428 static int
 429 read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 430            bfd_vma pc,
 431            disassemble_info *info,
 432            bfd_byte *buf,
 433            int buflen,
 434            CGEN_EXTRACT_INFO *ex_info,
 435            unsigned long *insn_value)
 436 {
 437   int status = (*info->read_memory_func) (pc, buf, buflen, info);
 438
 439   if (status != 0)
 440     {
 441       (*info->memory_error_func) (status, pc, info);
 442       return -1;
 443     }
 444
 445   ex_info->dis_info = info;
 446   ex_info->valid = (1 << buflen) - 1;
 447   ex_info->insn_bytes = buf;
 448
 449   *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
 450   return 0;
 451 }
 452
 453 /* Utility to print an insn.
 454    BUF is the base part of the insn, target byte order, BUFLEN bytes long.
 455    The result is the size of the insn in bytes or zero for an unknown insn
 456    or -1 if an error occurs fetching data (memory_error_func will have
 457    been called).  */
 458
 459 static int
 460 print_insn (CGEN_CPU_DESC cd,
 461             bfd_vma pc,
 462             disassemble_info *info,
 463             bfd_byte *buf,
 464             unsigned int buflen)
 465 {
 466   CGEN_INSN_INT insn_value;
 467   const CGEN_INSN_LIST *insn_list;
 468   CGEN_EXTRACT_INFO ex_info;
 469   int basesize;
 470
 471   /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
 472   basesize = cd->base_insn_bitsize < buflen * 8 ?
 473                                      cd->base_insn_bitsize : buflen * 8;
 474   insn_value = cgen_get_insn_value (cd, buf, basesize);
 475
 476
 477   /* Fill in ex_info fields like read_insn would.  Don't actually call
 478      read_insn, since the incoming buffer is already read (and possibly
 479      modified a la m32r).  */
 480   ex_info.valid = (1 << buflen) - 1;
 481   ex_info.dis_info = info;
 482   ex_info.insn_bytes = buf;
 483
 484   /* The instructions are stored in hash lists.
 485      Pick the first one and keep trying until we find the right one.  */
 486
 487   insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value);
 488   while (insn_list != NULL)
 489     {
 490       const CGEN_INSN *insn = insn_list->insn;
 491       CGEN_FIELDS fields;
 492       int length;
 493       unsigned long insn_value_cropped;
 494
 495 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
 496       /* Not needed as insn shouldn't be in hash lists if not supported.  */
 497       /* Supported by this cpu?  */
 498       if (! fr30_cgen_insn_supported (cd, insn))
 499         {
 500           insn_list = CGEN_DIS_NEXT_INSN (insn_list);
 501           continue;
 502         }
 503 #endif
 504
 505       /* Basic bit mask must be correct.  */
 506       /* ??? May wish to allow target to defer this check until the extract
 507          handler.  */
 508
 509       /* Base size may exceed this instruction's size.  Extract the
 510          relevant part from the buffer. */
 511       if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
 512           (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
 513         insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
 514                                            info->endian == BFD_ENDIAN_BIG);
 515       else
 516         insn_value_cropped = insn_value;
 517
 518       if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
 519           == CGEN_INSN_BASE_VALUE (insn))
 520         {
 521           /* Printing is handled in two passes.  The first pass parses the
 522              machine insn and extracts the fields.  The second pass prints
 523              them.  */
 524
 525           /* Make sure the entire insn is loaded into insn_value, if it
 526              can fit.  */
 527           if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) &&
 528               (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
 529             {
 530               unsigned long full_insn_value;
 531               int rc = read_insn (cd, pc, info, buf,
 532                                   CGEN_INSN_BITSIZE (insn) / 8,
 533                                   & ex_info, & full_insn_value);
 534               if (rc != 0)
 535                 return rc;
 536               length = CGEN_EXTRACT_FN (cd, insn)
 537                 (cd, insn, &ex_info, full_insn_value, &fields, pc);
 538             }
 539           else
 540             length = CGEN_EXTRACT_FN (cd, insn)
 541               (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
 542
 543           /* Length < 0 -> error.  */
 544           if (length < 0)
 545             return length;
 546           if (length > 0)
 547             {
 548               CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
 549               /* Length is in bits, result is in bytes.  */
 550               return length / 8;
 551             }
 552         }
 553
 554       insn_list = CGEN_DIS_NEXT_INSN (insn_list);
 555     }
 556
 557   return 0;
 558 }
 559
 560 /* Default value for CGEN_PRINT_INSN.
 561    The result is the size of the insn in bytes or zero for an unknown insn
 562    or -1 if an error occured fetching bytes.  */
 563
 564 #ifndef CGEN_PRINT_INSN
 565 #define CGEN_PRINT_INSN default_print_insn
 566 #endif
 567
 568 static int
 569 default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info)
 570 {
 571   bfd_byte buf[CGEN_MAX_INSN_SIZE];
 572   int buflen;
 573   int status;
 574
 575   /* Attempt to read the base part of the insn.  */
 576   buflen = cd->base_insn_bitsize / 8;
 577   status = (*info->read_memory_func) (pc, buf, buflen, info);
 578
 579   /* Try again with the minimum part, if min < base.  */
 580   if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
 581     {
 582       buflen = cd->min_insn_bitsize / 8;
 583       status = (*info->read_memory_func) (pc, buf, buflen, info);
 584     }
 585
 586   if (status != 0)
 587     {
 588       (*info->memory_error_func) (status, pc, info);
 589       return -1;
 590     }
 591
 592   return print_insn (cd, pc, info, buf, buflen);
 593 }
 594
 595 /* Main entry point.
 596    Print one instruction from PC on INFO->STREAM.
 597    Return the size of the instruction (in bytes).  */
 598
 599 typedef struct cpu_desc_list
 600 {
 601   struct cpu_desc_list *next;
 602   CGEN_BITSET *isa;
 603   int mach;
 604   int endian;
 605   CGEN_CPU_DESC cd;
 606 } cpu_desc_list;
 607
 608 int
 609 print_insn_fr30 (bfd_vma pc, disassemble_info *info)
 610 {
 611   static cpu_desc_list *cd_list = 0;
 612   cpu_desc_list *cl = 0;
 613   static CGEN_CPU_DESC cd = 0;
 614   static CGEN_BITSET *prev_isa;
 615   static int prev_mach;
 616   static int prev_endian;
 617   int length;
 618   CGEN_BITSET *isa;
 619   int mach;
 620   int endian = (info->endian == BFD_ENDIAN_BIG
 621                 ? CGEN_ENDIAN_BIG
 622                 : CGEN_ENDIAN_LITTLE);
 623   enum bfd_architecture arch;
 624
 625   /* ??? gdb will set mach but leave the architecture as "unknown" */
 626 #ifndef CGEN_BFD_ARCH
 627 #define CGEN_BFD_ARCH bfd_arch_fr30
 628 #endif
 629   arch = info->arch;
 630   if (arch == bfd_arch_unknown)
 631     arch = CGEN_BFD_ARCH;
 632
 633   /* There's no standard way to compute the machine or isa number
 634      so we leave it to the target.  */
 635 #ifdef CGEN_COMPUTE_MACH
 636   mach = CGEN_COMPUTE_MACH (info);
 637 #else
 638   mach = info->mach;
 639 #endif
 640
 641 #ifdef CGEN_COMPUTE_ISA
 642   {
 643     static CGEN_BITSET *permanent_isa;
 644
 645     if (!permanent_isa)
 646       permanent_isa = cgen_bitset_create (MAX_ISAS);
 647     isa = permanent_isa;
 648     cgen_bitset_clear (isa);
 649     cgen_bitset_add (isa, CGEN_COMPUTE_ISA (info));
 650   }
 651 #else
 652   isa = info->insn_sets;
 653 #endif
 654
 655   /* If we've switched cpu's, try to find a handle we've used before */
 656   if (cd
 657       && (cgen_bitset_compare (isa, prev_isa) != 0
 658           || mach != prev_mach
 659           || endian != prev_endian))
 660     {
 661       cd = 0;
 662       for (cl = cd_list; cl; cl = cl->next)
 663         {
 664           if (cgen_bitset_compare (cl->isa, isa) == 0 &&
 665               cl->mach == mach &&
 666               cl->endian == endian)
 667             {
 668               cd = cl->cd;
 669               prev_isa = cd->isas;
 670               break;
 671             }
 672         }
 673     }
 674
 675   /* If we haven't initialized yet, initialize the opcode table.  */
 676   if (! cd)
 677     {
 678       const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
 679       const char *mach_name;
 680
 681       if (!arch_type)
 682         abort ();
 683       mach_name = arch_type->printable_name;
 684
 685       prev_isa = cgen_bitset_copy (isa);
 686       prev_mach = mach;
 687       prev_endian = endian;
 688       cd = fr30_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
 689                                  CGEN_CPU_OPEN_BFDMACH, mach_name,
 690                                  CGEN_CPU_OPEN_ENDIAN, prev_endian,
 691                                  CGEN_CPU_OPEN_END);
 692       if (!cd)
 693         abort ();
 694
 695       /* Save this away for future reference.  */
 696       cl = xmalloc (sizeof (struct cpu_desc_list));
 697       cl->cd = cd;
 698       cl->isa = prev_isa;
 699       cl->mach = mach;
 700       cl->endian = endian;
 701       cl->next = cd_list;
 702       cd_list = cl;
 703
 704       fr30_cgen_init_dis (cd);
 705     }
 706
 707   /* We try to have as much common code as possible.
 708      But at this point some targets need to take over.  */
 709   /* ??? Some targets may need a hook elsewhere.  Try to avoid this,
 710      but if not possible try to move this hook elsewhere rather than
 711      have two hooks.  */
 712   length = CGEN_PRINT_INSN (cd, pc, info);
 713   if (length > 0)
 714     return length;
 715   if (length < 0)
 716     return -1;
 717
 718   (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
 719   return cd->default_insn_bitsize / 8;
 720 }