opcodes/ip2k-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 "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, PTR, CGEN_FIELDS *, void const *, bfd_vma, int);
 220
 221 /* Main entry point for printing operands.
 222    XINFO is a `void *' and not a `disassemble_info *' to not put a requirement
 223    of dis-asm.h on cgen.h.
 224
 225    This function is basically just a big switch statement.  Earlier versions
 226    used tables to look up the function to use, but
 227    - if the table contains both assembler and disassembler functions then
 228      the disassembler contains much of the assembler and vice-versa,
 229    - there's a lot of inlining possibilities as things grow,
 230    - using a switch statement avoids the function call overhead.
 231
 232    This function could be moved into `print_insn_normal', but keeping it
 233    separate makes clear the interface between `print_insn_normal' and each of
 234    the handlers.  */
 235
 236 void
 237 ip2k_cgen_print_operand (CGEN_CPU_DESC cd,
 238                            int opindex,
 239                            void * xinfo,
 240                            CGEN_FIELDS *fields,
 241                            void const *attrs ATTRIBUTE_UNUSED,
 242                            bfd_vma pc,
 243                            int length)
 244 {
 245   disassemble_info *info = (disassemble_info *) xinfo;
 246
 247   switch (opindex)
 248     {
 249     case IP2K_OPERAND_ADDR16CJP :
 250       print_dollarhex_cj (cd, info, fields->f_addr16cjp, 0|(1<<CGEN_OPERAND_ABS_ADDR), pc, length);
 251       break;
 252     case IP2K_OPERAND_ADDR16H :
 253       print_dollarhex_addr16h (cd, info, fields->f_imm8, 0, pc, length);
 254       break;
 255     case IP2K_OPERAND_ADDR16L :
 256       print_dollarhex_addr16l (cd, info, fields->f_imm8, 0, pc, length);
 257       break;
 258     case IP2K_OPERAND_ADDR16P :
 259       print_dollarhex_p (cd, info, fields->f_page3, 0, pc, length);
 260       break;
 261     case IP2K_OPERAND_BITNO :
 262       print_decimal (cd, info, fields->f_bitno, 0, pc, length);
 263       break;
 264     case IP2K_OPERAND_CBIT :
 265       print_normal (cd, info, 0, 0, pc, length);
 266       break;
 267     case IP2K_OPERAND_DCBIT :
 268       print_normal (cd, info, 0, 0, pc, length);
 269       break;
 270     case IP2K_OPERAND_FR :
 271       print_fr (cd, info, fields->f_reg, 0|(1<<CGEN_OPERAND_ABS_ADDR), pc, length);
 272       break;
 273     case IP2K_OPERAND_LIT8 :
 274       print_dollarhex8 (cd, info, fields->f_imm8, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
 275       break;
 276     case IP2K_OPERAND_PABITS :
 277       print_normal (cd, info, 0, 0, pc, length);
 278       break;
 279     case IP2K_OPERAND_RETI3 :
 280       print_dollarhex (cd, info, fields->f_reti3, 0, pc, length);
 281       break;
 282     case IP2K_OPERAND_ZBIT :
 283       print_normal (cd, info, 0, 0, pc, length);
 284       break;
 285
 286     default :
 287       /* xgettext:c-format */
 288       fprintf (stderr, _("Unrecognized field %d while printing insn.\n"),
 289                opindex);
 290     abort ();
 291   }
 292 }
 293
 294 cgen_print_fn * const ip2k_cgen_print_handlers[] =
 295 {
 296   print_insn_normal,
 297 };
 298
 299
 300 void
 301 ip2k_cgen_init_dis (CGEN_CPU_DESC cd)
 302 {
 303   ip2k_cgen_init_opcode_table (cd);
 304   ip2k_cgen_init_ibld_table (cd);
 305   cd->print_handlers = & ip2k_cgen_print_handlers[0];
 306   cd->print_operand = ip2k_cgen_print_operand;
 307 }
 308
 309 \f
 310 /* Default print handler.  */
 311
 312 static void
 313 print_normal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 314               void *dis_info,
 315               long value,
 316               unsigned int attrs,
 317               bfd_vma pc ATTRIBUTE_UNUSED,
 318               int length ATTRIBUTE_UNUSED)
 319 {
 320   disassemble_info *info = (disassemble_info *) dis_info;
 321
 322   /* Print the operand as directed by the attributes.  */
 323   if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
 324     ; /* nothing to do */
 325   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
 326     (*info->fprintf_func) (info->stream, "%ld", value);
 327   else
 328     (*info->fprintf_func) (info->stream, "0x%lx", value);
 329 }
 330
 331 /* Default address handler.  */
 332
 333 static void
 334 print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 335                void *dis_info,
 336                bfd_vma value,
 337                unsigned int attrs,
 338                bfd_vma pc ATTRIBUTE_UNUSED,
 339                int length ATTRIBUTE_UNUSED)
 340 {
 341   disassemble_info *info = (disassemble_info *) dis_info;
 342
 343   /* Print the operand as directed by the attributes.  */
 344   if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
 345     ; /* Nothing to do.  */
 346   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
 347     (*info->print_address_func) (value, info);
 348   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
 349     (*info->print_address_func) (value, info);
 350   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
 351     (*info->fprintf_func) (info->stream, "%ld", (long) value);
 352   else
 353     (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
 354 }
 355
 356 /* Keyword print handler.  */
 357
 358 static void
 359 print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 360                void *dis_info,
 361                CGEN_KEYWORD *keyword_table,
 362                long value,
 363                unsigned int attrs ATTRIBUTE_UNUSED)
 364 {
 365   disassemble_info *info = (disassemble_info *) dis_info;
 366   const CGEN_KEYWORD_ENTRY *ke;
 367
 368   ke = cgen_keyword_lookup_value (keyword_table, value);
 369   if (ke != NULL)
 370     (*info->fprintf_func) (info->stream, "%s", ke->name);
 371   else
 372     (*info->fprintf_func) (info->stream, "???");
 373 }
 374 \f
 375 /* Default insn printer.
 376
 377    DIS_INFO is defined as `void *' so the disassembler needn't know anything
 378    about disassemble_info.  */
 379
 380 static void
 381 print_insn_normal (CGEN_CPU_DESC cd,
 382                    void *dis_info,
 383                    const CGEN_INSN *insn,
 384                    CGEN_FIELDS *fields,
 385                    bfd_vma pc,
 386                    int length)
 387 {
 388   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 389   disassemble_info *info = (disassemble_info *) dis_info;
 390   const CGEN_SYNTAX_CHAR_TYPE *syn;
 391
 392   CGEN_INIT_PRINT (cd);
 393
 394   for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
 395     {
 396       if (CGEN_SYNTAX_MNEMONIC_P (*syn))
 397         {
 398           (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
 399           continue;
 400         }
 401       if (CGEN_SYNTAX_CHAR_P (*syn))
 402         {
 403           (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
 404           continue;
 405         }
 406
 407       /* We have an operand.  */
 408       ip2k_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
 409                                  fields, CGEN_INSN_ATTRS (insn), pc, length);
 410     }
 411 }
 412 \f
 413 /* Subroutine of print_insn. Reads an insn into the given buffers and updates
 414    the extract info.
 415    Returns 0 if all is well, non-zero otherwise.  */
 416
 417 static int
 418 read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 419            bfd_vma pc,
 420            disassemble_info *info,
 421            bfd_byte *buf,
 422            int buflen,
 423            CGEN_EXTRACT_INFO *ex_info,
 424            unsigned long *insn_value)
 425 {
 426   int status = (*info->read_memory_func) (pc, buf, buflen, info);
 427
 428   if (status != 0)
 429     {
 430       (*info->memory_error_func) (status, pc, info);
 431       return -1;
 432     }
 433
 434   ex_info->dis_info = info;
 435   ex_info->valid = (1 << buflen) - 1;
 436   ex_info->insn_bytes = buf;
 437
 438   *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
 439   return 0;
 440 }
 441
 442 /* Utility to print an insn.
 443    BUF is the base part of the insn, target byte order, BUFLEN bytes long.
 444    The result is the size of the insn in bytes or zero for an unknown insn
 445    or -1 if an error occurs fetching data (memory_error_func will have
 446    been called).  */
 447
 448 static int
 449 print_insn (CGEN_CPU_DESC cd,
 450             bfd_vma pc,
 451             disassemble_info *info,
 452             bfd_byte *buf,
 453             unsigned int buflen)
 454 {
 455   CGEN_INSN_INT insn_value;
 456   const CGEN_INSN_LIST *insn_list;
 457   CGEN_EXTRACT_INFO ex_info;
 458   int basesize;
 459
 460   /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
 461   basesize = cd->base_insn_bitsize < buflen * 8 ?
 462                                      cd->base_insn_bitsize : buflen * 8;
 463   insn_value = cgen_get_insn_value (cd, buf, basesize);
 464
 465
 466   /* Fill in ex_info fields like read_insn would.  Don't actually call
 467      read_insn, since the incoming buffer is already read (and possibly
 468      modified a la m32r).  */
 469   ex_info.valid = (1 << buflen) - 1;
 470   ex_info.dis_info = info;
 471   ex_info.insn_bytes = buf;
 472
 473   /* The instructions are stored in hash lists.
 474      Pick the first one and keep trying until we find the right one.  */
 475
 476   insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value);
 477   while (insn_list != NULL)
 478     {
 479       const CGEN_INSN *insn = insn_list->insn;
 480       CGEN_FIELDS fields;
 481       int length;
 482       unsigned long insn_value_cropped;
 483
 484 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
 485       /* Not needed as insn shouldn't be in hash lists if not supported.  */
 486       /* Supported by this cpu?  */
 487       if (! ip2k_cgen_insn_supported (cd, insn))
 488         {
 489           insn_list = CGEN_DIS_NEXT_INSN (insn_list);
 490           continue;
 491         }
 492 #endif
 493
 494       /* Basic bit mask must be correct.  */
 495       /* ??? May wish to allow target to defer this check until the extract
 496          handler.  */
 497
 498       /* Base size may exceed this instruction's size.  Extract the
 499          relevant part from the buffer. */
 500       if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
 501           (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
 502         insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
 503                                            info->endian == BFD_ENDIAN_BIG);
 504       else
 505         insn_value_cropped = insn_value;
 506
 507       if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
 508           == CGEN_INSN_BASE_VALUE (insn))
 509         {
 510           /* Printing is handled in two passes.  The first pass parses the
 511              machine insn and extracts the fields.  The second pass prints
 512              them.  */
 513
 514           /* Make sure the entire insn is loaded into insn_value, if it
 515              can fit.  */
 516           if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) &&
 517               (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
 518             {
 519               unsigned long full_insn_value;
 520               int rc = read_insn (cd, pc, info, buf,
 521                                   CGEN_INSN_BITSIZE (insn) / 8,
 522                                   & ex_info, & full_insn_value);
 523               if (rc != 0)
 524                 return rc;
 525               length = CGEN_EXTRACT_FN (cd, insn)
 526                 (cd, insn, &ex_info, full_insn_value, &fields, pc);
 527             }
 528           else
 529             length = CGEN_EXTRACT_FN (cd, insn)
 530               (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
 531
 532           /* Length < 0 -> error.  */
 533           if (length < 0)
 534             return length;
 535           if (length > 0)
 536             {
 537               CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
 538               /* Length is in bits, result is in bytes.  */
 539               return length / 8;
 540             }
 541         }
 542
 543       insn_list = CGEN_DIS_NEXT_INSN (insn_list);
 544     }
 545
 546   return 0;
 547 }
 548
 549 /* Default value for CGEN_PRINT_INSN.
 550    The result is the size of the insn in bytes or zero for an unknown insn
 551    or -1 if an error occured fetching bytes.  */
 552
 553 #ifndef CGEN_PRINT_INSN
 554 #define CGEN_PRINT_INSN default_print_insn
 555 #endif
 556
 557 static int
 558 default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info)
 559 {
 560   bfd_byte buf[CGEN_MAX_INSN_SIZE];
 561   int buflen;
 562   int status;
 563
 564   /* Attempt to read the base part of the insn.  */
 565   buflen = cd->base_insn_bitsize / 8;
 566   status = (*info->read_memory_func) (pc, buf, buflen, info);
 567
 568   /* Try again with the minimum part, if min < base.  */
 569   if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
 570     {
 571       buflen = cd->min_insn_bitsize / 8;
 572       status = (*info->read_memory_func) (pc, buf, buflen, info);
 573     }
 574
 575   if (status != 0)
 576     {
 577       (*info->memory_error_func) (status, pc, info);
 578       return -1;
 579     }
 580
 581   return print_insn (cd, pc, info, buf, buflen);
 582 }
 583
 584 /* Main entry point.
 585    Print one instruction from PC on INFO->STREAM.
 586    Return the size of the instruction (in bytes).  */
 587
 588 typedef struct cpu_desc_list
 589 {
 590   struct cpu_desc_list *next;
 591   CGEN_BITSET *isa;
 592   int mach;
 593   int endian;
 594   CGEN_CPU_DESC cd;
 595 } cpu_desc_list;
 596
 597 int
 598 print_insn_ip2k (bfd_vma pc, disassemble_info *info)
 599 {
 600   static cpu_desc_list *cd_list = 0;
 601   cpu_desc_list *cl = 0;
 602   static CGEN_CPU_DESC cd = 0;
 603   static CGEN_BITSET *prev_isa;
 604   static int prev_mach;
 605   static int prev_endian;
 606   int length;
 607   CGEN_BITSET *isa;
 608   int mach;
 609   int endian = (info->endian == BFD_ENDIAN_BIG
 610                 ? CGEN_ENDIAN_BIG
 611                 : CGEN_ENDIAN_LITTLE);
 612   enum bfd_architecture arch;
 613
 614   /* ??? gdb will set mach but leave the architecture as "unknown" */
 615 #ifndef CGEN_BFD_ARCH
 616 #define CGEN_BFD_ARCH bfd_arch_ip2k
 617 #endif
 618   arch = info->arch;
 619   if (arch == bfd_arch_unknown)
 620     arch = CGEN_BFD_ARCH;
 621
 622   /* There's no standard way to compute the machine or isa number
 623      so we leave it to the target.  */
 624 #ifdef CGEN_COMPUTE_MACH
 625   mach = CGEN_COMPUTE_MACH (info);
 626 #else
 627   mach = info->mach;
 628 #endif
 629
 630 #ifdef CGEN_COMPUTE_ISA
 631   {
 632     static CGEN_BITSET *permanent_isa;
 633
 634     if (!permanent_isa)
 635       permanent_isa = cgen_bitset_create (MAX_ISAS);
 636     isa = permanent_isa;
 637     cgen_bitset_clear (isa);
 638     cgen_bitset_add (isa, CGEN_COMPUTE_ISA (info));
 639   }
 640 #else
 641   isa = info->insn_sets;
 642 #endif
 643
 644   /* If we've switched cpu's, try to find a handle we've used before */
 645   if (cd
 646       && (cgen_bitset_compare (isa, prev_isa) != 0
 647           || mach != prev_mach
 648           || endian != prev_endian))
 649     {
 650       cd = 0;
 651       for (cl = cd_list; cl; cl = cl->next)
 652         {
 653           if (cgen_bitset_compare (cl->isa, isa) == 0 &&
 654               cl->mach == mach &&
 655               cl->endian == endian)
 656             {
 657               cd = cl->cd;
 658               prev_isa = cd->isas;
 659               break;
 660             }
 661         }
 662     }
 663
 664   /* If we haven't initialized yet, initialize the opcode table.  */
 665   if (! cd)
 666     {
 667       const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
 668       const char *mach_name;
 669
 670       if (!arch_type)
 671         abort ();
 672       mach_name = arch_type->printable_name;
 673
 674       prev_isa = cgen_bitset_copy (isa);
 675       prev_mach = mach;
 676       prev_endian = endian;
 677       cd = ip2k_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
 678                                  CGEN_CPU_OPEN_BFDMACH, mach_name,
 679                                  CGEN_CPU_OPEN_ENDIAN, prev_endian,
 680                                  CGEN_CPU_OPEN_END);
 681       if (!cd)
 682         abort ();
 683
 684       /* Save this away for future reference.  */
 685       cl = xmalloc (sizeof (struct cpu_desc_list));
 686       cl->cd = cd;
 687       cl->isa = prev_isa;
 688       cl->mach = mach;
 689       cl->endian = endian;
 690       cl->next = cd_list;
 691       cd_list = cl;
 692
 693       ip2k_cgen_init_dis (cd);
 694     }
 695
 696   /* We try to have as much common code as possible.
 697      But at this point some targets need to take over.  */
 698   /* ??? Some targets may need a hook elsewhere.  Try to avoid this,
 699      but if not possible try to move this hook elsewhere rather than
 700      have two hooks.  */
 701   length = CGEN_PRINT_INSN (cd, pc, info);
 702   if (length > 0)
 703     return length;
 704   if (length < 0)
 705     return -1;
 706
 707   (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
 708   return cd->default_insn_bitsize / 8;
 709 }