opcodes/ip2k-ibld.c

   1 /* Instruction building/extraction support for ip2k. -*- C -*-
   2
   3 THIS FILE IS MACHINE GENERATED WITH CGEN: Cpu tools GENerator.
   4 - the resultant file is machine generated, cgen-ibld.in isn't
   5
   6 Copyright 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
   7
   8 This file is part of the GNU Binutils and GDB, the GNU debugger.
   9
  10 This program is free software; you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation; either version 2, or (at your option)
  13 any later version.
  14
  15 This program is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with this program; if not, write to the Free Software Foundation, Inc.,
  22 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  23
  24 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
  25    Keep that in mind.  */
  26
  27 #include "sysdep.h"
  28 #include <stdio.h>
  29 #include "ansidecl.h"
  30 #include "dis-asm.h"
  31 #include "bfd.h"
  32 #include "symcat.h"
  33 #include "ip2k-desc.h"
  34 #include "ip2k-opc.h"
  35 #include "opintl.h"
  36 #include "safe-ctype.h"
  37
  38 #undef min
  39 #define min(a,b) ((a) < (b) ? (a) : (b))
  40 #undef max
  41 #define max(a,b) ((a) > (b) ? (a) : (b))
  42
  43 /* Used by the ifield rtx function.  */
  44 #define FLD(f) (fields->f)
  45
  46 static const char * insert_normal
  47      PARAMS ((CGEN_CPU_DESC, long, unsigned int, unsigned int, unsigned int,
  48               unsigned int, unsigned int, unsigned int, CGEN_INSN_BYTES_PTR));
  49 static const char * insert_insn_normal
  50      PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *,
  51               CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma));
  52 static int extract_normal
  53      PARAMS ((CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, CGEN_INSN_INT,
  54               unsigned int, unsigned int, unsigned int, unsigned int,
  55               unsigned int, unsigned int, bfd_vma, long *));
  56 static int extract_insn_normal
  57      PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, CGEN_EXTRACT_INFO *,
  58               CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma));
  59 #if CGEN_INT_INSN_P
  60 static void put_insn_int_value
  61      PARAMS ((CGEN_CPU_DESC, CGEN_INSN_BYTES_PTR, int, int, CGEN_INSN_INT));
  62 #endif
  63 #if ! CGEN_INT_INSN_P
  64 static CGEN_INLINE void insert_1
  65      PARAMS ((CGEN_CPU_DESC, unsigned long, int, int, int, unsigned char *));
  66 static CGEN_INLINE int fill_cache
  67      PARAMS ((CGEN_CPU_DESC, CGEN_EXTRACT_INFO *,  int, int, bfd_vma));
  68 static CGEN_INLINE long extract_1
  69      PARAMS ((CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, int,
  70               unsigned char *, bfd_vma));
  71 #endif
  72 \f
  73 /* Operand insertion.  */
  74
  75 #if ! CGEN_INT_INSN_P
  76
  77 /* Subroutine of insert_normal.  */
  78
  79 static CGEN_INLINE void
  80 insert_1 (cd, value, start, length, word_length, bufp)
  81      CGEN_CPU_DESC cd;
  82      unsigned long value;
  83      int start,length,word_length;
  84      unsigned char *bufp;
  85 {
  86   unsigned long x,mask;
  87   int shift;
  88
  89   x = cgen_get_insn_value (cd, bufp, word_length);
  90
  91   /* Written this way to avoid undefined behaviour.  */
  92   mask = (((1L << (length - 1)) - 1) << 1) | 1;
  93   if (CGEN_INSN_LSB0_P)
  94     shift = (start + 1) - length;
  95   else
  96     shift = (word_length - (start + length));
  97   x = (x & ~(mask << shift)) | ((value & mask) << shift);
  98
  99   cgen_put_insn_value (cd, bufp, word_length, (bfd_vma) x);
 100 }
 101
 102 #endif /* ! CGEN_INT_INSN_P */
 103
 104 /* Default insertion routine.
 105
 106    ATTRS is a mask of the boolean attributes.
 107    WORD_OFFSET is the offset in bits from the start of the insn of the value.
 108    WORD_LENGTH is the length of the word in bits in which the value resides.
 109    START is the starting bit number in the word, architecture origin.
 110    LENGTH is the length of VALUE in bits.
 111    TOTAL_LENGTH is the total length of the insn in bits.
 112
 113    The result is an error message or NULL if success.  */
 114
 115 /* ??? This duplicates functionality with bfd's howto table and
 116    bfd_install_relocation.  */
 117 /* ??? This doesn't handle bfd_vma's.  Create another function when
 118    necessary.  */
 119
 120 static const char *
 121 insert_normal (cd, value, attrs, word_offset, start, length, word_length,
 122                total_length, buffer)
 123      CGEN_CPU_DESC cd;
 124      long value;
 125      unsigned int attrs;
 126      unsigned int word_offset, start, length, word_length, total_length;
 127      CGEN_INSN_BYTES_PTR buffer;
 128 {
 129   static char errbuf[100];
 130   /* Written this way to avoid undefined behaviour.  */
 131   unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1;
 132
 133   /* If LENGTH is zero, this operand doesn't contribute to the value.  */
 134   if (length == 0)
 135     return NULL;
 136
 137 #if 0
 138   if (CGEN_INT_INSN_P
 139       && word_offset != 0)
 140     abort ();
 141 #endif
 142
 143   if (word_length > 32)
 144     abort ();
 145
 146   /* For architectures with insns smaller than the base-insn-bitsize,
 147      word_length may be too big.  */
 148   if (cd->min_insn_bitsize < cd->base_insn_bitsize)
 149     {
 150       if (word_offset == 0
 151           && word_length > total_length)
 152         word_length = total_length;
 153     }
 154
 155   /* Ensure VALUE will fit.  */
 156   if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGN_OPT))
 157     {
 158       long minval = - (1L << (length - 1));
 159       unsigned long maxval = mask;
 160
 161       if ((value > 0 && (unsigned long) value > maxval)
 162           || value < minval)
 163         {
 164           /* xgettext:c-format */
 165           sprintf (errbuf,
 166                    _("operand out of range (%ld not between %ld and %lu)"),
 167                    value, minval, maxval);
 168           return errbuf;
 169         }
 170     }
 171   else if (! CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED))
 172     {
 173       unsigned long maxval = mask;
 174
 175       if ((unsigned long) value > maxval)
 176         {
 177           /* xgettext:c-format */
 178           sprintf (errbuf,
 179                    _("operand out of range (%lu not between 0 and %lu)"),
 180                    value, maxval);
 181           return errbuf;
 182         }
 183     }
 184   else
 185     {
 186       if (! cgen_signed_overflow_ok_p (cd))
 187         {
 188           long minval = - (1L << (length - 1));
 189           long maxval =   (1L << (length - 1)) - 1;
 190
 191           if (value < minval || value > maxval)
 192             {
 193               sprintf
 194                 /* xgettext:c-format */
 195                 (errbuf, _("operand out of range (%ld not between %ld and %ld)"),
 196                  value, minval, maxval);
 197               return errbuf;
 198             }
 199         }
 200     }
 201
 202 #if CGEN_INT_INSN_P
 203
 204   {
 205     int shift;
 206
 207     if (CGEN_INSN_LSB0_P)
 208       shift = (word_offset + start + 1) - length;
 209     else
 210       shift = total_length - (word_offset + start + length);
 211     *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift);
 212   }
 213
 214 #else /* ! CGEN_INT_INSN_P */
 215
 216   {
 217     unsigned char *bufp = (unsigned char *) buffer + word_offset / 8;
 218
 219     insert_1 (cd, value, start, length, word_length, bufp);
 220   }
 221
 222 #endif /* ! CGEN_INT_INSN_P */
 223
 224   return NULL;
 225 }
 226
 227 /* Default insn builder (insert handler).
 228    The instruction is recorded in CGEN_INT_INSN_P byte order (meaning
 229    that if CGEN_INSN_BYTES_PTR is an int * and thus, the value is
 230    recorded in host byte order, otherwise BUFFER is an array of bytes
 231    and the value is recorded in target byte order).
 232    The result is an error message or NULL if success.  */
 233
 234 static const char *
 235 insert_insn_normal (cd, insn, fields, buffer, pc)
 236      CGEN_CPU_DESC cd;
 237      const CGEN_INSN * insn;
 238      CGEN_FIELDS * fields;
 239      CGEN_INSN_BYTES_PTR buffer;
 240      bfd_vma pc;
 241 {
 242   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 243   unsigned long value;
 244   const CGEN_SYNTAX_CHAR_TYPE * syn;
 245
 246   CGEN_INIT_INSERT (cd);
 247   value = CGEN_INSN_BASE_VALUE (insn);
 248
 249   /* If we're recording insns as numbers (rather than a string of bytes),
 250      target byte order handling is deferred until later.  */
 251
 252 #if CGEN_INT_INSN_P
 253
 254   put_insn_int_value (cd, buffer, cd->base_insn_bitsize,
 255                       CGEN_FIELDS_BITSIZE (fields), value);
 256
 257 #else
 258
 259   cgen_put_insn_value (cd, buffer, min ((unsigned) cd->base_insn_bitsize,
 260                                         (unsigned) CGEN_FIELDS_BITSIZE (fields)),
 261                        value);
 262
 263 #endif /* ! CGEN_INT_INSN_P */
 264
 265   /* ??? It would be better to scan the format's fields.
 266      Still need to be able to insert a value based on the operand though;
 267      e.g. storing a branch displacement that got resolved later.
 268      Needs more thought first.  */
 269
 270   for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn)
 271     {
 272       const char *errmsg;
 273
 274       if (CGEN_SYNTAX_CHAR_P (* syn))
 275         continue;
 276
 277       errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
 278                                        fields, buffer, pc);
 279       if (errmsg)
 280         return errmsg;
 281     }
 282
 283   return NULL;
 284 }
 285
 286 #if CGEN_INT_INSN_P
 287 /* Cover function to store an insn value into an integral insn.  Must go here
 288  because it needs <prefix>-desc.h for CGEN_INT_INSN_P.  */
 289
 290 static void
 291 put_insn_int_value (cd, buf, length, insn_length, value)
 292      CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
 293      CGEN_INSN_BYTES_PTR buf;
 294      int length;
 295      int insn_length;
 296      CGEN_INSN_INT value;
 297 {
 298   /* For architectures with insns smaller than the base-insn-bitsize,
 299      length may be too big.  */
 300   if (length > insn_length)
 301     *buf = value;
 302   else
 303     {
 304       int shift = insn_length - length;
 305       /* Written this way to avoid undefined behaviour.  */
 306       CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1;
 307       *buf = (*buf & ~(mask << shift)) | ((value & mask) << shift);
 308     }
 309 }
 310 #endif
 311 \f
 312 /* Operand extraction.  */
 313
 314 #if ! CGEN_INT_INSN_P
 315
 316 /* Subroutine of extract_normal.
 317    Ensure sufficient bytes are cached in EX_INFO.
 318    OFFSET is the offset in bytes from the start of the insn of the value.
 319    BYTES is the length of the needed value.
 320    Returns 1 for success, 0 for failure.  */
 321
 322 static CGEN_INLINE int
 323 fill_cache (cd, ex_info, offset, bytes, pc)
 324      CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
 325      CGEN_EXTRACT_INFO *ex_info;
 326      int offset, bytes;
 327      bfd_vma pc;
 328 {
 329   /* It's doubtful that the middle part has already been fetched so
 330      we don't optimize that case.  kiss.  */
 331   unsigned int mask;
 332   disassemble_info *info = (disassemble_info *) ex_info->dis_info;
 333
 334   /* First do a quick check.  */
 335   mask = (1 << bytes) - 1;
 336   if (((ex_info->valid >> offset) & mask) == mask)
 337     return 1;
 338
 339   /* Search for the first byte we need to read.  */
 340   for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1)
 341     if (! (mask & ex_info->valid))
 342       break;
 343
 344   if (bytes)
 345     {
 346       int status;
 347
 348       pc += offset;
 349       status = (*info->read_memory_func)
 350         (pc, ex_info->insn_bytes + offset, bytes, info);
 351
 352       if (status != 0)
 353         {
 354           (*info->memory_error_func) (status, pc, info);
 355           return 0;
 356         }
 357
 358       ex_info->valid |= ((1 << bytes) - 1) << offset;
 359     }
 360
 361   return 1;
 362 }
 363
 364 /* Subroutine of extract_normal.  */
 365
 366 static CGEN_INLINE long
 367 extract_1 (cd, ex_info, start, length, word_length, bufp, pc)
 368      CGEN_CPU_DESC cd;
 369      CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED;
 370      int start,length,word_length;
 371      unsigned char *bufp;
 372      bfd_vma pc ATTRIBUTE_UNUSED;
 373 {
 374   unsigned long x;
 375   int shift;
 376 #if 0
 377   int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG;
 378 #endif
 379   x = cgen_get_insn_value (cd, bufp, word_length);
 380
 381   if (CGEN_INSN_LSB0_P)
 382     shift = (start + 1) - length;
 383   else
 384     shift = (word_length - (start + length));
 385   return x >> shift;
 386 }
 387
 388 #endif /* ! CGEN_INT_INSN_P */
 389
 390 /* Default extraction routine.
 391
 392    INSN_VALUE is the first base_insn_bitsize bits of the insn in host order,
 393    or sometimes less for cases like the m32r where the base insn size is 32
 394    but some insns are 16 bits.
 395    ATTRS is a mask of the boolean attributes.  We only need `SIGNED',
 396    but for generality we take a bitmask of all of them.
 397    WORD_OFFSET is the offset in bits from the start of the insn of the value.
 398    WORD_LENGTH is the length of the word in bits in which the value resides.
 399    START is the starting bit number in the word, architecture origin.
 400    LENGTH is the length of VALUE in bits.
 401    TOTAL_LENGTH is the total length of the insn in bits.
 402
 403    Returns 1 for success, 0 for failure.  */
 404
 405 /* ??? The return code isn't properly used.  wip.  */
 406
 407 /* ??? This doesn't handle bfd_vma's.  Create another function when
 408    necessary.  */
 409
 410 static int
 411 extract_normal (cd, ex_info, insn_value, attrs, word_offset, start, length,
 412                 word_length, total_length, pc, valuep)
 413      CGEN_CPU_DESC cd;
 414 #if ! CGEN_INT_INSN_P
 415      CGEN_EXTRACT_INFO *ex_info;
 416 #else
 417      CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED;
 418 #endif
 419      CGEN_INSN_INT insn_value;
 420      unsigned int attrs;
 421      unsigned int word_offset, start, length, word_length, total_length;
 422 #if ! CGEN_INT_INSN_P
 423      bfd_vma pc;
 424 #else
 425      bfd_vma pc ATTRIBUTE_UNUSED;
 426 #endif
 427      long *valuep;
 428 {
 429   long value, mask;
 430
 431   /* If LENGTH is zero, this operand doesn't contribute to the value
 432      so give it a standard value of zero.  */
 433   if (length == 0)
 434     {
 435       *valuep = 0;
 436       return 1;
 437     }
 438
 439 #if 0
 440   if (CGEN_INT_INSN_P
 441       && word_offset != 0)
 442     abort ();
 443 #endif
 444
 445   if (word_length > 32)
 446     abort ();
 447
 448   /* For architectures with insns smaller than the insn-base-bitsize,
 449      word_length may be too big.  */
 450   if (cd->min_insn_bitsize < cd->base_insn_bitsize)
 451     {
 452       if (word_offset == 0
 453           && word_length > total_length)
 454         word_length = total_length;
 455     }
 456
 457   /* Does the value reside in INSN_VALUE, and at the right alignment?  */
 458
 459   if (CGEN_INT_INSN_P || (word_offset == 0 && word_length == total_length))
 460     {
 461       if (CGEN_INSN_LSB0_P)
 462         value = insn_value >> ((word_offset + start + 1) - length);
 463       else
 464         value = insn_value >> (total_length - ( word_offset + start + length));
 465     }
 466
 467 #if ! CGEN_INT_INSN_P
 468
 469   else
 470     {
 471       unsigned char *bufp = ex_info->insn_bytes + word_offset / 8;
 472
 473       if (word_length > 32)
 474         abort ();
 475
 476       if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0)
 477         return 0;
 478
 479       value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc);
 480     }
 481
 482 #endif /* ! CGEN_INT_INSN_P */
 483
 484   /* Written this way to avoid undefined behaviour.  */
 485   mask = (((1L << (length - 1)) - 1) << 1) | 1;
 486
 487   value &= mask;
 488   /* sign extend? */
 489   if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)
 490       && (value & (1L << (length - 1))))
 491     value |= ~mask;
 492
 493   *valuep = value;
 494
 495   return 1;
 496 }
 497
 498 /* Default insn extractor.
 499
 500    INSN_VALUE is the first base_insn_bitsize bits, translated to host order.
 501    The extracted fields are stored in FIELDS.
 502    EX_INFO is used to handle reading variable length insns.
 503    Return the length of the insn in bits, or 0 if no match,
 504    or -1 if an error occurs fetching data (memory_error_func will have
 505    been called).  */
 506
 507 static int
 508 extract_insn_normal (cd, insn, ex_info, insn_value, fields, pc)
 509      CGEN_CPU_DESC cd;
 510      const CGEN_INSN *insn;
 511      CGEN_EXTRACT_INFO *ex_info;
 512      CGEN_INSN_INT insn_value;
 513      CGEN_FIELDS *fields;
 514      bfd_vma pc;
 515 {
 516   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 517   const CGEN_SYNTAX_CHAR_TYPE *syn;
 518
 519   CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
 520
 521   CGEN_INIT_EXTRACT (cd);
 522
 523   for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
 524     {
 525       int length;
 526
 527       if (CGEN_SYNTAX_CHAR_P (*syn))
 528         continue;
 529
 530       length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
 531                                         ex_info, insn_value, fields, pc);
 532       if (length <= 0)
 533         return length;
 534     }
 535
 536   /* We recognized and successfully extracted this insn.  */
 537   return CGEN_INSN_BITSIZE (insn);
 538 }
 539 \f
 540 /* machine generated code added here */
 541
 542 const char * ip2k_cgen_insert_operand
 543   PARAMS ((CGEN_CPU_DESC, int, CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma));
 544
 545 /* Main entry point for operand insertion.
 546
 547    This function is basically just a big switch statement.  Earlier versions
 548    used tables to look up the function to use, but
 549    - if the table contains both assembler and disassembler functions then
 550      the disassembler contains much of the assembler and vice-versa,
 551    - there's a lot of inlining possibilities as things grow,
 552    - using a switch statement avoids the function call overhead.
 553
 554    This function could be moved into `parse_insn_normal', but keeping it
 555    separate makes clear the interface between `parse_insn_normal' and each of
 556    the handlers.  It's also needed by GAS to insert operands that couldn't be
 557    resolved during parsing.  */
 558
 559 const char *
 560 ip2k_cgen_insert_operand (cd, opindex, fields, buffer, pc)
 561      CGEN_CPU_DESC cd;
 562      int opindex;
 563      CGEN_FIELDS * fields;
 564      CGEN_INSN_BYTES_PTR buffer;
 565      bfd_vma pc ATTRIBUTE_UNUSED;
 566 {
 567   const char * errmsg = NULL;
 568   unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
 569
 570   switch (opindex)
 571     {
 572     case IP2K_OPERAND_ADDR16CJP :
 573       errmsg = insert_normal (cd, fields->f_addr16cjp, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 12, 13, 16, total_length, buffer);
 574       break;
 575     case IP2K_OPERAND_ADDR16H :
 576       errmsg = insert_normal (cd, fields->f_imm8, 0, 0, 7, 8, 16, total_length, buffer);
 577       break;
 578     case IP2K_OPERAND_ADDR16L :
 579       errmsg = insert_normal (cd, fields->f_imm8, 0, 0, 7, 8, 16, total_length, buffer);
 580       break;
 581     case IP2K_OPERAND_ADDR16P :
 582       errmsg = insert_normal (cd, fields->f_page3, 0, 0, 2, 3, 16, total_length, buffer);
 583       break;
 584     case IP2K_OPERAND_BITNO :
 585       errmsg = insert_normal (cd, fields->f_bitno, 0, 0, 11, 3, 16, total_length, buffer);
 586       break;
 587     case IP2K_OPERAND_CBIT :
 588       break;
 589     case IP2K_OPERAND_DCBIT :
 590       break;
 591     case IP2K_OPERAND_FR :
 592       errmsg = insert_normal (cd, fields->f_reg, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 8, 9, 16, total_length, buffer);
 593       break;
 594     case IP2K_OPERAND_LIT8 :
 595       errmsg = insert_normal (cd, fields->f_imm8, 0, 0, 7, 8, 16, total_length, buffer);
 596       break;
 597     case IP2K_OPERAND_PABITS :
 598       break;
 599     case IP2K_OPERAND_RETI3 :
 600       errmsg = insert_normal (cd, fields->f_reti3, 0, 0, 2, 3, 16, total_length, buffer);
 601       break;
 602     case IP2K_OPERAND_ZBIT :
 603       break;
 604
 605     default :
 606       /* xgettext:c-format */
 607       fprintf (stderr, _("Unrecognized field %d while building insn.\n"),
 608                opindex);
 609       abort ();
 610   }
 611
 612   return errmsg;
 613 }
 614
 615 int ip2k_cgen_extract_operand
 616   PARAMS ((CGEN_CPU_DESC, int, CGEN_EXTRACT_INFO *, CGEN_INSN_INT,
 617            CGEN_FIELDS *, bfd_vma));
 618
 619 /* Main entry point for operand extraction.
 620    The result is <= 0 for error, >0 for success.
 621    ??? Actual values aren't well defined right now.
 622
 623    This function is basically just a big switch statement.  Earlier versions
 624    used tables to look up the function to use, but
 625    - if the table contains both assembler and disassembler functions then
 626      the disassembler contains much of the assembler and vice-versa,
 627    - there's a lot of inlining possibilities as things grow,
 628    - using a switch statement avoids the function call overhead.
 629
 630    This function could be moved into `print_insn_normal', but keeping it
 631    separate makes clear the interface between `print_insn_normal' and each of
 632    the handlers.  */
 633
 634 int
 635 ip2k_cgen_extract_operand (cd, opindex, ex_info, insn_value, fields, pc)
 636      CGEN_CPU_DESC cd;
 637      int opindex;
 638      CGEN_EXTRACT_INFO *ex_info;
 639      CGEN_INSN_INT insn_value;
 640      CGEN_FIELDS * fields;
 641      bfd_vma pc;
 642 {
 643   /* Assume success (for those operands that are nops).  */
 644   int length = 1;
 645   unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
 646
 647   switch (opindex)
 648     {
 649     case IP2K_OPERAND_ADDR16CJP :
 650       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 12, 13, 16, total_length, pc, & fields->f_addr16cjp);
 651       break;
 652     case IP2K_OPERAND_ADDR16H :
 653       length = extract_normal (cd, ex_info, insn_value, 0, 0, 7, 8, 16, total_length, pc, & fields->f_imm8);
 654       break;
 655     case IP2K_OPERAND_ADDR16L :
 656       length = extract_normal (cd, ex_info, insn_value, 0, 0, 7, 8, 16, total_length, pc, & fields->f_imm8);
 657       break;
 658     case IP2K_OPERAND_ADDR16P :
 659       length = extract_normal (cd, ex_info, insn_value, 0, 0, 2, 3, 16, total_length, pc, & fields->f_page3);
 660       break;
 661     case IP2K_OPERAND_BITNO :
 662       length = extract_normal (cd, ex_info, insn_value, 0, 0, 11, 3, 16, total_length, pc, & fields->f_bitno);
 663       break;
 664     case IP2K_OPERAND_CBIT :
 665       break;
 666     case IP2K_OPERAND_DCBIT :
 667       break;
 668     case IP2K_OPERAND_FR :
 669       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 8, 9, 16, total_length, pc, & fields->f_reg);
 670       break;
 671     case IP2K_OPERAND_LIT8 :
 672       length = extract_normal (cd, ex_info, insn_value, 0, 0, 7, 8, 16, total_length, pc, & fields->f_imm8);
 673       break;
 674     case IP2K_OPERAND_PABITS :
 675       break;
 676     case IP2K_OPERAND_RETI3 :
 677       length = extract_normal (cd, ex_info, insn_value, 0, 0, 2, 3, 16, total_length, pc, & fields->f_reti3);
 678       break;
 679     case IP2K_OPERAND_ZBIT :
 680       break;
 681
 682     default :
 683       /* xgettext:c-format */
 684       fprintf (stderr, _("Unrecognized field %d while decoding insn.\n"),
 685                opindex);
 686       abort ();
 687     }
 688
 689   return length;
 690 }
 691
 692 cgen_insert_fn * const ip2k_cgen_insert_handlers[] =
 693 {
 694   insert_insn_normal,
 695 };
 696
 697 cgen_extract_fn * const ip2k_cgen_extract_handlers[] =
 698 {
 699   extract_insn_normal,
 700 };
 701
 702 int ip2k_cgen_get_int_operand
 703   PARAMS ((CGEN_CPU_DESC, int, const CGEN_FIELDS *));
 704 bfd_vma ip2k_cgen_get_vma_operand
 705   PARAMS ((CGEN_CPU_DESC, int, const CGEN_FIELDS *));
 706
 707 /* Getting values from cgen_fields is handled by a collection of functions.
 708    They are distinguished by the type of the VALUE argument they return.
 709    TODO: floating point, inlining support, remove cases where result type
 710    not appropriate.  */
 711
 712 int
 713 ip2k_cgen_get_int_operand (cd, opindex, fields)
 714      CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
 715      int opindex;
 716      const CGEN_FIELDS * fields;
 717 {
 718   int value;
 719
 720   switch (opindex)
 721     {
 722     case IP2K_OPERAND_ADDR16CJP :
 723       value = fields->f_addr16cjp;
 724       break;
 725     case IP2K_OPERAND_ADDR16H :
 726       value = fields->f_imm8;
 727       break;
 728     case IP2K_OPERAND_ADDR16L :
 729       value = fields->f_imm8;
 730       break;
 731     case IP2K_OPERAND_ADDR16P :
 732       value = fields->f_page3;
 733       break;
 734     case IP2K_OPERAND_BITNO :
 735       value = fields->f_bitno;
 736       break;
 737     case IP2K_OPERAND_CBIT :
 738       value = 0;
 739       break;
 740     case IP2K_OPERAND_DCBIT :
 741       value = 0;
 742       break;
 743     case IP2K_OPERAND_FR :
 744       value = fields->f_reg;
 745       break;
 746     case IP2K_OPERAND_LIT8 :
 747       value = fields->f_imm8;
 748       break;
 749     case IP2K_OPERAND_PABITS :
 750       value = 0;
 751       break;
 752     case IP2K_OPERAND_RETI3 :
 753       value = fields->f_reti3;
 754       break;
 755     case IP2K_OPERAND_ZBIT :
 756       value = 0;
 757       break;
 758
 759     default :
 760       /* xgettext:c-format */
 761       fprintf (stderr, _("Unrecognized field %d while getting int operand.\n"),
 762                        opindex);
 763       abort ();
 764   }
 765
 766   return value;
 767 }
 768
 769 bfd_vma
 770 ip2k_cgen_get_vma_operand (cd, opindex, fields)
 771      CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
 772      int opindex;
 773      const CGEN_FIELDS * fields;
 774 {
 775   bfd_vma value;
 776
 777   switch (opindex)
 778     {
 779     case IP2K_OPERAND_ADDR16CJP :
 780       value = fields->f_addr16cjp;
 781       break;
 782     case IP2K_OPERAND_ADDR16H :
 783       value = fields->f_imm8;
 784       break;
 785     case IP2K_OPERAND_ADDR16L :
 786       value = fields->f_imm8;
 787       break;
 788     case IP2K_OPERAND_ADDR16P :
 789       value = fields->f_page3;
 790       break;
 791     case IP2K_OPERAND_BITNO :
 792       value = fields->f_bitno;
 793       break;
 794     case IP2K_OPERAND_CBIT :
 795       value = 0;
 796       break;
 797     case IP2K_OPERAND_DCBIT :
 798       value = 0;
 799       break;
 800     case IP2K_OPERAND_FR :
 801       value = fields->f_reg;
 802       break;
 803     case IP2K_OPERAND_LIT8 :
 804       value = fields->f_imm8;
 805       break;
 806     case IP2K_OPERAND_PABITS :
 807       value = 0;
 808       break;
 809     case IP2K_OPERAND_RETI3 :
 810       value = fields->f_reti3;
 811       break;
 812     case IP2K_OPERAND_ZBIT :
 813       value = 0;
 814       break;
 815
 816     default :
 817       /* xgettext:c-format */
 818       fprintf (stderr, _("Unrecognized field %d while getting vma operand.\n"),
 819                        opindex);
 820       abort ();
 821   }
 822
 823   return value;
 824 }
 825
 826 void ip2k_cgen_set_int_operand
 827   PARAMS ((CGEN_CPU_DESC, int, CGEN_FIELDS *, int));
 828 void ip2k_cgen_set_vma_operand
 829   PARAMS ((CGEN_CPU_DESC, int, CGEN_FIELDS *, bfd_vma));
 830
 831 /* Stuffing values in cgen_fields is handled by a collection of functions.
 832    They are distinguished by the type of the VALUE argument they accept.
 833    TODO: floating point, inlining support, remove cases where argument type
 834    not appropriate.  */
 835
 836 void
 837 ip2k_cgen_set_int_operand (cd, opindex, fields, value)
 838      CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
 839      int opindex;
 840      CGEN_FIELDS * fields;
 841      int value;
 842 {
 843   switch (opindex)
 844     {
 845     case IP2K_OPERAND_ADDR16CJP :
 846       fields->f_addr16cjp = value;
 847       break;
 848     case IP2K_OPERAND_ADDR16H :
 849       fields->f_imm8 = value;
 850       break;
 851     case IP2K_OPERAND_ADDR16L :
 852       fields->f_imm8 = value;
 853       break;
 854     case IP2K_OPERAND_ADDR16P :
 855       fields->f_page3 = value;
 856       break;
 857     case IP2K_OPERAND_BITNO :
 858       fields->f_bitno = value;
 859       break;
 860     case IP2K_OPERAND_CBIT :
 861       break;
 862     case IP2K_OPERAND_DCBIT :
 863       break;
 864     case IP2K_OPERAND_FR :
 865       fields->f_reg = value;
 866       break;
 867     case IP2K_OPERAND_LIT8 :
 868       fields->f_imm8 = value;
 869       break;
 870     case IP2K_OPERAND_PABITS :
 871       break;
 872     case IP2K_OPERAND_RETI3 :
 873       fields->f_reti3 = value;
 874       break;
 875     case IP2K_OPERAND_ZBIT :
 876       break;
 877
 878     default :
 879       /* xgettext:c-format */
 880       fprintf (stderr, _("Unrecognized field %d while setting int operand.\n"),
 881                        opindex);
 882       abort ();
 883   }
 884 }
 885
 886 void
 887 ip2k_cgen_set_vma_operand (cd, opindex, fields, value)
 888      CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
 889      int opindex;
 890      CGEN_FIELDS * fields;
 891      bfd_vma value;
 892 {
 893   switch (opindex)
 894     {
 895     case IP2K_OPERAND_ADDR16CJP :
 896       fields->f_addr16cjp = value;
 897       break;
 898     case IP2K_OPERAND_ADDR16H :
 899       fields->f_imm8 = value;
 900       break;
 901     case IP2K_OPERAND_ADDR16L :
 902       fields->f_imm8 = value;
 903       break;
 904     case IP2K_OPERAND_ADDR16P :
 905       fields->f_page3 = value;
 906       break;
 907     case IP2K_OPERAND_BITNO :
 908       fields->f_bitno = value;
 909       break;
 910     case IP2K_OPERAND_CBIT :
 911       break;
 912     case IP2K_OPERAND_DCBIT :
 913       break;
 914     case IP2K_OPERAND_FR :
 915       fields->f_reg = value;
 916       break;
 917     case IP2K_OPERAND_LIT8 :
 918       fields->f_imm8 = value;
 919       break;
 920     case IP2K_OPERAND_PABITS :
 921       break;
 922     case IP2K_OPERAND_RETI3 :
 923       fields->f_reti3 = value;
 924       break;
 925     case IP2K_OPERAND_ZBIT :
 926       break;
 927
 928     default :
 929       /* xgettext:c-format */
 930       fprintf (stderr, _("Unrecognized field %d while setting vma operand.\n"),
 931                        opindex);
 932       abort ();
 933   }
 934 }
 935
 936 /* Function to call before using the instruction builder tables.  */
 937
 938 void
 939 ip2k_cgen_init_ibld_table (cd)
 940      CGEN_CPU_DESC cd;
 941 {
 942   cd->insert_handlers = & ip2k_cgen_insert_handlers[0];
 943   cd->extract_handlers = & ip2k_cgen_extract_handlers[0];
 944
 945   cd->insert_operand = ip2k_cgen_insert_operand;
 946   cd->extract_operand = ip2k_cgen_extract_operand;
 947
 948   cd->get_int_operand = ip2k_cgen_get_int_operand;
 949   cd->set_int_operand = ip2k_cgen_set_int_operand;
 950   cd->get_vma_operand = ip2k_cgen_get_vma_operand;
 951   cd->set_vma_operand = ip2k_cgen_set_vma_operand;
 952 }