opcodes/xc16x-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
   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 "xc16x-desc.h"
  37 #include "xc16x-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 #define CGEN_PRINT_NORMAL(cd, info, value, attrs, pc, length)   \
  64   do                                                            \
  65     {                                                           \
  66       if (CGEN_BOOL_ATTR ((attrs), CGEN_OPERAND_DOT_PREFIX))    \
  67         info->fprintf_func (info->stream, ".");                 \
  68       if (CGEN_BOOL_ATTR ((attrs), CGEN_OPERAND_POF_PREFIX))    \
  69         info->fprintf_func (info->stream, "#pof:");             \
  70       if (CGEN_BOOL_ATTR ((attrs), CGEN_OPERAND_PAG_PREFIX))    \
  71         info->fprintf_func (info->stream, "#pag:");             \
  72     }                                                           \
  73   while (0)
  74
  75 /* Print a 'pof:' prefix to an operand.  */
  76
  77 static void
  78 print_pof (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
  79            void * dis_info ATTRIBUTE_UNUSED,
  80            long value ATTRIBUTE_UNUSED,
  81            unsigned int attrs ATTRIBUTE_UNUSED,
  82            bfd_vma pc ATTRIBUTE_UNUSED,
  83            int length ATTRIBUTE_UNUSED)
  84 {
  85 }
  86
  87 /* Print a 'pag:' prefix to an operand.  */
  88
  89 static void
  90 print_pag (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
  91            void * dis_info ATTRIBUTE_UNUSED,
  92            long value ATTRIBUTE_UNUSED,
  93            unsigned int attrs ATTRIBUTE_UNUSED,
  94            bfd_vma pc ATTRIBUTE_UNUSED,
  95            int length ATTRIBUTE_UNUSED)
  96 {
  97 }
  98
  99 /* Print a 'sof:' prefix to an operand.  */
 100
 101 static void
 102 print_sof (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 103            void * dis_info,
 104            long value ATTRIBUTE_UNUSED,
 105            unsigned int attrs ATTRIBUTE_UNUSED,
 106            bfd_vma pc ATTRIBUTE_UNUSED,
 107            int length ATTRIBUTE_UNUSED)
 108 {
 109   disassemble_info *info = (disassemble_info *) dis_info;
 110
 111   info->fprintf_func (info->stream, "sof:");
 112 }
 113
 114 /* Print a 'seg:' prefix to an operand.  */
 115
 116 static void
 117 print_seg (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 118            void * dis_info,
 119            long value ATTRIBUTE_UNUSED,
 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, "seg:");
 127 }
 128
 129 /* Print a '#' prefix to an operand.  */
 130
 131 static void
 132 print_hash (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 133             void * dis_info,
 134             long value ATTRIBUTE_UNUSED,
 135             unsigned int attrs ATTRIBUTE_UNUSED,
 136             bfd_vma pc ATTRIBUTE_UNUSED,
 137             int length ATTRIBUTE_UNUSED)
 138 {
 139   disassemble_info *info = (disassemble_info *) dis_info;
 140
 141   info->fprintf_func (info->stream, "#");
 142 }
 143
 144 /* Print a '.' prefix to an operand.  */
 145
 146 static void
 147 print_dot (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 148            void * dis_info ATTRIBUTE_UNUSED,
 149            long value ATTRIBUTE_UNUSED,
 150            unsigned int attrs ATTRIBUTE_UNUSED,
 151            bfd_vma pc ATTRIBUTE_UNUSED,
 152            int length ATTRIBUTE_UNUSED)
 153 {
 154 }
 155
 156 /* -- */
 157
 158 void xc16x_cgen_print_operand
 159   (CGEN_CPU_DESC, int, PTR, CGEN_FIELDS *, void const *, bfd_vma, int);
 160
 161 /* Main entry point for printing operands.
 162    XINFO is a `void *' and not a `disassemble_info *' to not put a requirement
 163    of dis-asm.h on cgen.h.
 164
 165    This function is basically just a big switch statement.  Earlier versions
 166    used tables to look up the function to use, but
 167    - if the table contains both assembler and disassembler functions then
 168      the disassembler contains much of the assembler and vice-versa,
 169    - there's a lot of inlining possibilities as things grow,
 170    - using a switch statement avoids the function call overhead.
 171
 172    This function could be moved into `print_insn_normal', but keeping it
 173    separate makes clear the interface between `print_insn_normal' and each of
 174    the handlers.  */
 175
 176 void
 177 xc16x_cgen_print_operand (CGEN_CPU_DESC cd,
 178                            int opindex,
 179                            void * xinfo,
 180                            CGEN_FIELDS *fields,
 181                            void const *attrs ATTRIBUTE_UNUSED,
 182                            bfd_vma pc,
 183                            int length)
 184 {
 185   disassemble_info *info = (disassemble_info *) xinfo;
 186
 187   switch (opindex)
 188     {
 189     case XC16X_OPERAND_REGNAM :
 190       print_keyword (cd, info, & xc16x_cgen_opval_psw_names, fields->f_reg8, 0);
 191       break;
 192     case XC16X_OPERAND_BIT01 :
 193       print_normal (cd, info, fields->f_op_1bit, 0, pc, length);
 194       break;
 195     case XC16X_OPERAND_BIT1 :
 196       print_normal (cd, info, fields->f_op_bit1, 0, pc, length);
 197       break;
 198     case XC16X_OPERAND_BIT2 :
 199       print_normal (cd, info, fields->f_op_bit2, 0, pc, length);
 200       break;
 201     case XC16X_OPERAND_BIT4 :
 202       print_normal (cd, info, fields->f_op_bit4, 0, pc, length);
 203       break;
 204     case XC16X_OPERAND_BIT8 :
 205       print_normal (cd, info, fields->f_op_bit8, 0, pc, length);
 206       break;
 207     case XC16X_OPERAND_BITONE :
 208       print_normal (cd, info, fields->f_op_onebit, 0, pc, length);
 209       break;
 210     case XC16X_OPERAND_CADDR :
 211       print_address (cd, info, fields->f_offset16, 0|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_ABS_ADDR), pc, length);
 212       break;
 213     case XC16X_OPERAND_COND :
 214       print_keyword (cd, info, & xc16x_cgen_opval_conditioncode_names, fields->f_condcode, 0);
 215       break;
 216     case XC16X_OPERAND_DATA8 :
 217       print_normal (cd, info, fields->f_data8, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 218       break;
 219     case XC16X_OPERAND_DATAHI8 :
 220       print_normal (cd, info, fields->f_datahi8, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 221       break;
 222     case XC16X_OPERAND_DOT :
 223       print_dot (cd, info, 0, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
 224       break;
 225     case XC16X_OPERAND_DR :
 226       print_keyword (cd, info, & xc16x_cgen_opval_gr_names, fields->f_r1, 0);
 227       break;
 228     case XC16X_OPERAND_DRB :
 229       print_keyword (cd, info, & xc16x_cgen_opval_grb_names, fields->f_r1, 0);
 230       break;
 231     case XC16X_OPERAND_DRI :
 232       print_keyword (cd, info, & xc16x_cgen_opval_gr_names, fields->f_r4, 0);
 233       break;
 234     case XC16X_OPERAND_EXTCOND :
 235       print_keyword (cd, info, & xc16x_cgen_opval_extconditioncode_names, fields->f_extccode, 0);
 236       break;
 237     case XC16X_OPERAND_GENREG :
 238       print_keyword (cd, info, & xc16x_cgen_opval_r8_names, fields->f_regb8, 0);
 239       break;
 240     case XC16X_OPERAND_HASH :
 241       print_hash (cd, info, 0, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
 242       break;
 243     case XC16X_OPERAND_ICOND :
 244       print_keyword (cd, info, & xc16x_cgen_opval_conditioncode_names, fields->f_icondcode, 0);
 245       break;
 246     case XC16X_OPERAND_LBIT2 :
 247       print_normal (cd, info, fields->f_op_lbit2, 0, pc, length);
 248       break;
 249     case XC16X_OPERAND_LBIT4 :
 250       print_normal (cd, info, fields->f_op_lbit4, 0, pc, length);
 251       break;
 252     case XC16X_OPERAND_MASK8 :
 253       print_normal (cd, info, fields->f_mask8, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 254       break;
 255     case XC16X_OPERAND_MASKLO8 :
 256       print_normal (cd, info, fields->f_datahi8, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 257       break;
 258     case XC16X_OPERAND_MEMGR8 :
 259       print_keyword (cd, info, & xc16x_cgen_opval_memgr8_names, fields->f_memgr8, 0);
 260       break;
 261     case XC16X_OPERAND_MEMORY :
 262       print_address (cd, info, fields->f_memory, 0, pc, length);
 263       break;
 264     case XC16X_OPERAND_PAG :
 265       print_pag (cd, info, 0, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
 266       break;
 267     case XC16X_OPERAND_PAGENUM :
 268       print_normal (cd, info, fields->f_pagenum, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 269       break;
 270     case XC16X_OPERAND_POF :
 271       print_pof (cd, info, 0, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
 272       break;
 273     case XC16X_OPERAND_QBIT :
 274       print_normal (cd, info, fields->f_qbit, 0|(1<<CGEN_OPERAND_DOT_PREFIX), pc, length);
 275       break;
 276     case XC16X_OPERAND_QHIBIT :
 277       print_normal (cd, info, fields->f_qhibit, 0|(1<<CGEN_OPERAND_DOT_PREFIX), pc, length);
 278       break;
 279     case XC16X_OPERAND_QLOBIT :
 280       print_normal (cd, info, fields->f_qlobit, 0|(1<<CGEN_OPERAND_DOT_PREFIX), pc, length);
 281       break;
 282     case XC16X_OPERAND_REG8 :
 283       print_keyword (cd, info, & xc16x_cgen_opval_r8_names, fields->f_reg8, 0);
 284       break;
 285     case XC16X_OPERAND_REGB8 :
 286       print_keyword (cd, info, & xc16x_cgen_opval_grb8_names, fields->f_regb8, 0);
 287       break;
 288     case XC16X_OPERAND_REGBMEM8 :
 289       print_keyword (cd, info, & xc16x_cgen_opval_regbmem8_names, fields->f_regmem8, 0);
 290       break;
 291     case XC16X_OPERAND_REGHI8 :
 292       print_keyword (cd, info, & xc16x_cgen_opval_r8_names, fields->f_reghi8, 0);
 293       break;
 294     case XC16X_OPERAND_REGMEM8 :
 295       print_keyword (cd, info, & xc16x_cgen_opval_regmem8_names, fields->f_regmem8, 0);
 296       break;
 297     case XC16X_OPERAND_REGOFF8 :
 298       print_keyword (cd, info, & xc16x_cgen_opval_r8_names, fields->f_regoff8, 0);
 299       break;
 300     case XC16X_OPERAND_REL :
 301       print_normal (cd, info, fields->f_rel8, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
 302       break;
 303     case XC16X_OPERAND_RELHI :
 304       print_normal (cd, info, fields->f_relhi8, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
 305       break;
 306     case XC16X_OPERAND_SEG :
 307       print_normal (cd, info, fields->f_seg8, 0, pc, length);
 308       break;
 309     case XC16X_OPERAND_SEGHI8 :
 310       print_normal (cd, info, fields->f_segnum8, 0, pc, length);
 311       break;
 312     case XC16X_OPERAND_SEGM :
 313       print_seg (cd, info, 0, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
 314       break;
 315     case XC16X_OPERAND_SOF :
 316       print_sof (cd, info, 0, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
 317       break;
 318     case XC16X_OPERAND_SR :
 319       print_keyword (cd, info, & xc16x_cgen_opval_gr_names, fields->f_r2, 0);
 320       break;
 321     case XC16X_OPERAND_SR2 :
 322       print_keyword (cd, info, & xc16x_cgen_opval_gr_names, fields->f_r0, 0);
 323       break;
 324     case XC16X_OPERAND_SRB :
 325       print_keyword (cd, info, & xc16x_cgen_opval_grb_names, fields->f_r2, 0);
 326       break;
 327     case XC16X_OPERAND_SRC1 :
 328       print_keyword (cd, info, & xc16x_cgen_opval_gr_names, fields->f_r1, 0);
 329       break;
 330     case XC16X_OPERAND_SRC2 :
 331       print_keyword (cd, info, & xc16x_cgen_opval_gr_names, fields->f_r2, 0);
 332       break;
 333     case XC16X_OPERAND_SRDIV :
 334       print_keyword (cd, info, & xc16x_cgen_opval_regdiv8_names, fields->f_reg8, 0);
 335       break;
 336     case XC16X_OPERAND_U4 :
 337       print_keyword (cd, info, & xc16x_cgen_opval_reg0_name, fields->f_uimm4, 0);
 338       break;
 339     case XC16X_OPERAND_UIMM16 :
 340       print_normal (cd, info, fields->f_uimm16, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 341       break;
 342     case XC16X_OPERAND_UIMM2 :
 343       print_keyword (cd, info, & xc16x_cgen_opval_ext_names, fields->f_uimm2, 0|(1<<CGEN_OPERAND_HASH_PREFIX));
 344       break;
 345     case XC16X_OPERAND_UIMM3 :
 346       print_keyword (cd, info, & xc16x_cgen_opval_reg0_name1, fields->f_uimm3, 0|(1<<CGEN_OPERAND_HASH_PREFIX));
 347       break;
 348     case XC16X_OPERAND_UIMM4 :
 349       print_normal (cd, info, fields->f_uimm4, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 350       break;
 351     case XC16X_OPERAND_UIMM7 :
 352       print_normal (cd, info, fields->f_uimm7, 0|(1<<CGEN_OPERAND_HASH_PREFIX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
 353       break;
 354     case XC16X_OPERAND_UIMM8 :
 355       print_normal (cd, info, fields->f_uimm8, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
 356       break;
 357     case XC16X_OPERAND_UPAG16 :
 358       print_normal (cd, info, fields->f_uimm16, 0|(1<<CGEN_OPERAND_PAG_PREFIX), pc, length);
 359       break;
 360     case XC16X_OPERAND_UPOF16 :
 361       print_address (cd, info, fields->f_memory, 0|(1<<CGEN_OPERAND_POF_PREFIX), pc, length);
 362       break;
 363     case XC16X_OPERAND_USEG16 :
 364       print_normal (cd, info, fields->f_offset16, 0|(1<<CGEN_OPERAND_SEG_PREFIX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_ABS_ADDR), pc, length);
 365       break;
 366     case XC16X_OPERAND_USEG8 :
 367       print_normal (cd, info, fields->f_seg8, 0|(1<<CGEN_OPERAND_SEG_PREFIX), pc, length);
 368       break;
 369     case XC16X_OPERAND_USOF16 :
 370       print_normal (cd, info, fields->f_offset16, 0|(1<<CGEN_OPERAND_SOF_PREFIX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_ABS_ADDR), pc, length);
 371       break;
 372
 373     default :
 374       /* xgettext:c-format */
 375       fprintf (stderr, _("Unrecognized field %d while printing insn.\n"),
 376                opindex);
 377     abort ();
 378   }
 379 }
 380
 381 cgen_print_fn * const xc16x_cgen_print_handlers[] =
 382 {
 383   print_insn_normal,
 384 };
 385
 386
 387 void
 388 xc16x_cgen_init_dis (CGEN_CPU_DESC cd)
 389 {
 390   xc16x_cgen_init_opcode_table (cd);
 391   xc16x_cgen_init_ibld_table (cd);
 392   cd->print_handlers = & xc16x_cgen_print_handlers[0];
 393   cd->print_operand = xc16x_cgen_print_operand;
 394 }
 395
 396 \f
 397 /* Default print handler.  */
 398
 399 static void
 400 print_normal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 401               void *dis_info,
 402               long value,
 403               unsigned int attrs,
 404               bfd_vma pc ATTRIBUTE_UNUSED,
 405               int length ATTRIBUTE_UNUSED)
 406 {
 407   disassemble_info *info = (disassemble_info *) dis_info;
 408
 409 #ifdef CGEN_PRINT_NORMAL
 410   CGEN_PRINT_NORMAL (cd, info, value, attrs, pc, length);
 411 #endif
 412
 413   /* Print the operand as directed by the attributes.  */
 414   if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
 415     ; /* nothing to do */
 416   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
 417     (*info->fprintf_func) (info->stream, "%ld", value);
 418   else
 419     (*info->fprintf_func) (info->stream, "0x%lx", value);
 420 }
 421
 422 /* Default address handler.  */
 423
 424 static void
 425 print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 426                void *dis_info,
 427                bfd_vma value,
 428                unsigned int attrs,
 429                bfd_vma pc ATTRIBUTE_UNUSED,
 430                int length ATTRIBUTE_UNUSED)
 431 {
 432   disassemble_info *info = (disassemble_info *) dis_info;
 433
 434 #ifdef CGEN_PRINT_ADDRESS
 435   CGEN_PRINT_ADDRESS (cd, info, value, attrs, pc, length);
 436 #endif
 437
 438   /* Print the operand as directed by the attributes.  */
 439   if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
 440     ; /* Nothing to do.  */
 441   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
 442     (*info->print_address_func) (value, info);
 443   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
 444     (*info->print_address_func) (value, info);
 445   else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
 446     (*info->fprintf_func) (info->stream, "%ld", (long) value);
 447   else
 448     (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
 449 }
 450
 451 /* Keyword print handler.  */
 452
 453 static void
 454 print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 455                void *dis_info,
 456                CGEN_KEYWORD *keyword_table,
 457                long value,
 458                unsigned int attrs ATTRIBUTE_UNUSED)
 459 {
 460   disassemble_info *info = (disassemble_info *) dis_info;
 461   const CGEN_KEYWORD_ENTRY *ke;
 462
 463   ke = cgen_keyword_lookup_value (keyword_table, value);
 464   if (ke != NULL)
 465     (*info->fprintf_func) (info->stream, "%s", ke->name);
 466   else
 467     (*info->fprintf_func) (info->stream, "???");
 468 }
 469 \f
 470 /* Default insn printer.
 471
 472    DIS_INFO is defined as `void *' so the disassembler needn't know anything
 473    about disassemble_info.  */
 474
 475 static void
 476 print_insn_normal (CGEN_CPU_DESC cd,
 477                    void *dis_info,
 478                    const CGEN_INSN *insn,
 479                    CGEN_FIELDS *fields,
 480                    bfd_vma pc,
 481                    int length)
 482 {
 483   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 484   disassemble_info *info = (disassemble_info *) dis_info;
 485   const CGEN_SYNTAX_CHAR_TYPE *syn;
 486
 487   CGEN_INIT_PRINT (cd);
 488
 489   for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
 490     {
 491       if (CGEN_SYNTAX_MNEMONIC_P (*syn))
 492         {
 493           (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
 494           continue;
 495         }
 496       if (CGEN_SYNTAX_CHAR_P (*syn))
 497         {
 498           (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
 499           continue;
 500         }
 501
 502       /* We have an operand.  */
 503       xc16x_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
 504                                  fields, CGEN_INSN_ATTRS (insn), pc, length);
 505     }
 506 }
 507 \f
 508 /* Subroutine of print_insn. Reads an insn into the given buffers and updates
 509    the extract info.
 510    Returns 0 if all is well, non-zero otherwise.  */
 511
 512 static int
 513 read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 514            bfd_vma pc,
 515            disassemble_info *info,
 516            bfd_byte *buf,
 517            int buflen,
 518            CGEN_EXTRACT_INFO *ex_info,
 519            unsigned long *insn_value)
 520 {
 521   int status = (*info->read_memory_func) (pc, buf, buflen, info);
 522
 523   if (status != 0)
 524     {
 525       (*info->memory_error_func) (status, pc, info);
 526       return -1;
 527     }
 528
 529   ex_info->dis_info = info;
 530   ex_info->valid = (1 << buflen) - 1;
 531   ex_info->insn_bytes = buf;
 532
 533   *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
 534   return 0;
 535 }
 536
 537 /* Utility to print an insn.
 538    BUF is the base part of the insn, target byte order, BUFLEN bytes long.
 539    The result is the size of the insn in bytes or zero for an unknown insn
 540    or -1 if an error occurs fetching data (memory_error_func will have
 541    been called).  */
 542
 543 static int
 544 print_insn (CGEN_CPU_DESC cd,
 545             bfd_vma pc,
 546             disassemble_info *info,
 547             bfd_byte *buf,
 548             unsigned int buflen)
 549 {
 550   CGEN_INSN_INT insn_value;
 551   const CGEN_INSN_LIST *insn_list;
 552   CGEN_EXTRACT_INFO ex_info;
 553   int basesize;
 554
 555   /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
 556   basesize = cd->base_insn_bitsize < buflen * 8 ?
 557                                      cd->base_insn_bitsize : buflen * 8;
 558   insn_value = cgen_get_insn_value (cd, buf, basesize);
 559
 560
 561   /* Fill in ex_info fields like read_insn would.  Don't actually call
 562      read_insn, since the incoming buffer is already read (and possibly
 563      modified a la m32r).  */
 564   ex_info.valid = (1 << buflen) - 1;
 565   ex_info.dis_info = info;
 566   ex_info.insn_bytes = buf;
 567
 568   /* The instructions are stored in hash lists.
 569      Pick the first one and keep trying until we find the right one.  */
 570
 571   insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value);
 572   while (insn_list != NULL)
 573     {
 574       const CGEN_INSN *insn = insn_list->insn;
 575       CGEN_FIELDS fields;
 576       int length;
 577       unsigned long insn_value_cropped;
 578
 579 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
 580       /* Not needed as insn shouldn't be in hash lists if not supported.  */
 581       /* Supported by this cpu?  */
 582       if (! xc16x_cgen_insn_supported (cd, insn))
 583         {
 584           insn_list = CGEN_DIS_NEXT_INSN (insn_list);
 585           continue;
 586         }
 587 #endif
 588
 589       /* Basic bit mask must be correct.  */
 590       /* ??? May wish to allow target to defer this check until the extract
 591          handler.  */
 592
 593       /* Base size may exceed this instruction's size.  Extract the
 594          relevant part from the buffer. */
 595       if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
 596           (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
 597         insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
 598                                            info->endian == BFD_ENDIAN_BIG);
 599       else
 600         insn_value_cropped = insn_value;
 601
 602       if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
 603           == CGEN_INSN_BASE_VALUE (insn))
 604         {
 605           /* Printing is handled in two passes.  The first pass parses the
 606              machine insn and extracts the fields.  The second pass prints
 607              them.  */
 608
 609           /* Make sure the entire insn is loaded into insn_value, if it
 610              can fit.  */
 611           if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) &&
 612               (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
 613             {
 614               unsigned long full_insn_value;
 615               int rc = read_insn (cd, pc, info, buf,
 616                                   CGEN_INSN_BITSIZE (insn) / 8,
 617                                   & ex_info, & full_insn_value);
 618               if (rc != 0)
 619                 return rc;
 620               length = CGEN_EXTRACT_FN (cd, insn)
 621                 (cd, insn, &ex_info, full_insn_value, &fields, pc);
 622             }
 623           else
 624             length = CGEN_EXTRACT_FN (cd, insn)
 625               (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
 626
 627           /* Length < 0 -> error.  */
 628           if (length < 0)
 629             return length;
 630           if (length > 0)
 631             {
 632               CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
 633               /* Length is in bits, result is in bytes.  */
 634               return length / 8;
 635             }
 636         }
 637
 638       insn_list = CGEN_DIS_NEXT_INSN (insn_list);
 639     }
 640
 641   return 0;
 642 }
 643
 644 /* Default value for CGEN_PRINT_INSN.
 645    The result is the size of the insn in bytes or zero for an unknown insn
 646    or -1 if an error occured fetching bytes.  */
 647
 648 #ifndef CGEN_PRINT_INSN
 649 #define CGEN_PRINT_INSN default_print_insn
 650 #endif
 651
 652 static int
 653 default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info)
 654 {
 655   bfd_byte buf[CGEN_MAX_INSN_SIZE];
 656   int buflen;
 657   int status;
 658
 659   /* Attempt to read the base part of the insn.  */
 660   buflen = cd->base_insn_bitsize / 8;
 661   status = (*info->read_memory_func) (pc, buf, buflen, info);
 662
 663   /* Try again with the minimum part, if min < base.  */
 664   if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
 665     {
 666       buflen = cd->min_insn_bitsize / 8;
 667       status = (*info->read_memory_func) (pc, buf, buflen, info);
 668     }
 669
 670   if (status != 0)
 671     {
 672       (*info->memory_error_func) (status, pc, info);
 673       return -1;
 674     }
 675
 676   return print_insn (cd, pc, info, buf, buflen);
 677 }
 678
 679 /* Main entry point.
 680    Print one instruction from PC on INFO->STREAM.
 681    Return the size of the instruction (in bytes).  */
 682
 683 typedef struct cpu_desc_list
 684 {
 685   struct cpu_desc_list *next;
 686   CGEN_BITSET *isa;
 687   int mach;
 688   int endian;
 689   CGEN_CPU_DESC cd;
 690 } cpu_desc_list;
 691
 692 int
 693 print_insn_xc16x (bfd_vma pc, disassemble_info *info)
 694 {
 695   static cpu_desc_list *cd_list = 0;
 696   cpu_desc_list *cl = 0;
 697   static CGEN_CPU_DESC cd = 0;
 698   static CGEN_BITSET *prev_isa;
 699   static int prev_mach;
 700   static int prev_endian;
 701   int length;
 702   CGEN_BITSET *isa;
 703   int mach;
 704   int endian = (info->endian == BFD_ENDIAN_BIG
 705                 ? CGEN_ENDIAN_BIG
 706                 : CGEN_ENDIAN_LITTLE);
 707   enum bfd_architecture arch;
 708
 709   /* ??? gdb will set mach but leave the architecture as "unknown" */
 710 #ifndef CGEN_BFD_ARCH
 711 #define CGEN_BFD_ARCH bfd_arch_xc16x
 712 #endif
 713   arch = info->arch;
 714   if (arch == bfd_arch_unknown)
 715     arch = CGEN_BFD_ARCH;
 716
 717   /* There's no standard way to compute the machine or isa number
 718      so we leave it to the target.  */
 719 #ifdef CGEN_COMPUTE_MACH
 720   mach = CGEN_COMPUTE_MACH (info);
 721 #else
 722   mach = info->mach;
 723 #endif
 724
 725 #ifdef CGEN_COMPUTE_ISA
 726   {
 727     static CGEN_BITSET *permanent_isa;
 728
 729     if (!permanent_isa)
 730       permanent_isa = cgen_bitset_create (MAX_ISAS);
 731     isa = permanent_isa;
 732     cgen_bitset_clear (isa);
 733     cgen_bitset_add (isa, CGEN_COMPUTE_ISA (info));
 734   }
 735 #else
 736   isa = info->insn_sets;
 737 #endif
 738
 739   /* If we've switched cpu's, try to find a handle we've used before */
 740   if (cd
 741       && (cgen_bitset_compare (isa, prev_isa) != 0
 742           || mach != prev_mach
 743           || endian != prev_endian))
 744     {
 745       cd = 0;
 746       for (cl = cd_list; cl; cl = cl->next)
 747         {
 748           if (cgen_bitset_compare (cl->isa, isa) == 0 &&
 749               cl->mach == mach &&
 750               cl->endian == endian)
 751             {
 752               cd = cl->cd;
 753               prev_isa = cd->isas;
 754               break;
 755             }
 756         }
 757     }
 758
 759   /* If we haven't initialized yet, initialize the opcode table.  */
 760   if (! cd)
 761     {
 762       const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
 763       const char *mach_name;
 764
 765       if (!arch_type)
 766         abort ();
 767       mach_name = arch_type->printable_name;
 768
 769       prev_isa = cgen_bitset_copy (isa);
 770       prev_mach = mach;
 771       prev_endian = endian;
 772       cd = xc16x_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
 773                                  CGEN_CPU_OPEN_BFDMACH, mach_name,
 774                                  CGEN_CPU_OPEN_ENDIAN, prev_endian,
 775                                  CGEN_CPU_OPEN_END);
 776       if (!cd)
 777         abort ();
 778
 779       /* Save this away for future reference.  */
 780       cl = xmalloc (sizeof (struct cpu_desc_list));
 781       cl->cd = cd;
 782       cl->isa = prev_isa;
 783       cl->mach = mach;
 784       cl->endian = endian;
 785       cl->next = cd_list;
 786       cd_list = cl;
 787
 788       xc16x_cgen_init_dis (cd);
 789     }
 790
 791   /* We try to have as much common code as possible.
 792      But at this point some targets need to take over.  */
 793   /* ??? Some targets may need a hook elsewhere.  Try to avoid this,
 794      but if not possible try to move this hook elsewhere rather than
 795      have two hooks.  */
 796   length = CGEN_PRINT_INSN (cd, pc, info);
 797   if (length > 0)
 798     return length;
 799   if (length < 0)
 800     return -1;
 801
 802   (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
 803   return cd->default_insn_bitsize / 8;
 804 }