opcodes/ip2k-ibld.c

   1 /* DO NOT EDIT!  -*- buffer-read-only: t -*- vi:set ro:  */
   2 /* Instruction building/extraction support for ip2k. -*- C -*-
   3
   4    THIS FILE IS MACHINE GENERATED WITH CGEN: Cpu tools GENerator.
   5    - the resultant file is machine generated, cgen-ibld.in isn't
   6
   7    Copyright (C) 1996-2020 Free Software Foundation, Inc.
   8
   9    This file is part of libopcodes.
  10
  11    This library is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3, or (at your option)
  14    any later version.
  15
  16    It is distributed in the hope that it will be useful, but WITHOUT
  17    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  18    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  19    License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program; if not, write to the Free Software Foundation, Inc.,
  23    51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  24
  25 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
  26    Keep that in mind.  */
  27
  28 #include "sysdep.h"
  29 #include <stdio.h>
  30 #include "ansidecl.h"
  31 #include "dis-asm.h"
  32 #include "bfd.h"
  33 #include "symcat.h"
  34 #include "ip2k-desc.h"
  35 #include "ip2k-opc.h"
  36 #include "cgen/basic-modes.h"
  37 #include "opintl.h"
  38 #include "safe-ctype.h"
  39
  40 #undef  min
  41 #define min(a,b) ((a) < (b) ? (a) : (b))
  42 #undef  max
  43 #define max(a,b) ((a) > (b) ? (a) : (b))
  44
  45 /* Used by the ifield rtx function.  */
  46 #define FLD(f) (fields->f)
  47
  48 static const char * insert_normal
  49   (CGEN_CPU_DESC, long, unsigned int, unsigned int, unsigned int,
  50    unsigned int, unsigned int, unsigned int, CGEN_INSN_BYTES_PTR);
  51 static const char * insert_insn_normal
  52   (CGEN_CPU_DESC, const CGEN_INSN *,
  53    CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma);
  54 static int extract_normal
  55   (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, CGEN_INSN_INT,
  56    unsigned int, unsigned int, unsigned int, unsigned int,
  57    unsigned int, unsigned int, bfd_vma, long *);
  58 static int extract_insn_normal
  59   (CGEN_CPU_DESC, const CGEN_INSN *, CGEN_EXTRACT_INFO *,
  60    CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
  61 #if CGEN_INT_INSN_P
  62 static void put_insn_int_value
  63   (CGEN_CPU_DESC, CGEN_INSN_BYTES_PTR, int, int, CGEN_INSN_INT);
  64 #endif
  65 #if ! CGEN_INT_INSN_P
  66 static CGEN_INLINE void insert_1
  67   (CGEN_CPU_DESC, unsigned long, int, int, int, unsigned char *);
  68 static CGEN_INLINE int fill_cache
  69   (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *,  int, int, bfd_vma);
  70 static CGEN_INLINE long extract_1
  71   (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, int, unsigned char *, bfd_vma);
  72 #endif
  73 \f
  74 /* Operand insertion.  */
  75
  76 #if ! CGEN_INT_INSN_P
  77
  78 /* Subroutine of insert_normal.  */
  79
  80 static CGEN_INLINE void
  81 insert_1 (CGEN_CPU_DESC cd,
  82           unsigned long value,
  83           int start,
  84           int length,
  85           int word_length,
  86           unsigned char *bufp)
  87 {
  88   unsigned long x,mask;
  89   int shift;
  90
  91   x = cgen_get_insn_value (cd, bufp, word_length);
  92
  93   /* Written this way to avoid undefined behaviour.  */
  94   mask = (((1L << (length - 1)) - 1) << 1) | 1;
  95   if (CGEN_INSN_LSB0_P)
  96     shift = (start + 1) - length;
  97   else
  98     shift = (word_length - (start + length));
  99   x = (x & ~(mask << shift)) | ((value & mask) << shift);
 100
 101   cgen_put_insn_value (cd, bufp, word_length, (bfd_vma) x);
 102 }
 103
 104 #endif /* ! CGEN_INT_INSN_P */
 105
 106 /* Default insertion routine.
 107
 108    ATTRS is a mask of the boolean attributes.
 109    WORD_OFFSET is the offset in bits from the start of the insn of the value.
 110    WORD_LENGTH is the length of the word in bits in which the value resides.
 111    START is the starting bit number in the word, architecture origin.
 112    LENGTH is the length of VALUE in bits.
 113    TOTAL_LENGTH is the total length of the insn in bits.
 114
 115    The result is an error message or NULL if success.  */
 116
 117 /* ??? This duplicates functionality with bfd's howto table and
 118    bfd_install_relocation.  */
 119 /* ??? This doesn't handle bfd_vma's.  Create another function when
 120    necessary.  */
 121
 122 static const char *
 123 insert_normal (CGEN_CPU_DESC cd,
 124                long value,
 125                unsigned int attrs,
 126                unsigned int word_offset,
 127                unsigned int start,
 128                unsigned int length,
 129                unsigned int word_length,
 130                unsigned int total_length,
 131                CGEN_INSN_BYTES_PTR buffer)
 132 {
 133   static char errbuf[100];
 134   /* Written this way to avoid undefined behaviour.  */
 135   unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1;
 136
 137   /* If LENGTH is zero, this operand doesn't contribute to the value.  */
 138   if (length == 0)
 139     return NULL;
 140
 141   if (word_length > 8 * sizeof (CGEN_INSN_INT))
 142     abort ();
 143
 144   /* For architectures with insns smaller than the base-insn-bitsize,
 145      word_length may be too big.  */
 146   if (cd->min_insn_bitsize < cd->base_insn_bitsize)
 147     {
 148       if (word_offset == 0
 149           && word_length > total_length)
 150         word_length = total_length;
 151     }
 152
 153   /* Ensure VALUE will fit.  */
 154   if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGN_OPT))
 155     {
 156       long minval = - (1L << (length - 1));
 157       unsigned long maxval = mask;
 158
 159       if ((value > 0 && (unsigned long) value > maxval)
 160           || value < minval)
 161         {
 162           /* xgettext:c-format */
 163           sprintf (errbuf,
 164                    _("operand out of range (%ld not between %ld and %lu)"),
 165                    value, minval, maxval);
 166           return errbuf;
 167         }
 168     }
 169   else if (! CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED))
 170     {
 171       unsigned long maxval = mask;
 172       unsigned long val = (unsigned long) value;
 173
 174       /* For hosts with a word size > 32 check to see if value has been sign
 175          extended beyond 32 bits.  If so then ignore these higher sign bits
 176          as the user is attempting to store a 32-bit signed value into an
 177          unsigned 32-bit field which is allowed.  */
 178       if (sizeof (unsigned long) > 4 && ((value >> 32) == -1))
 179         val &= 0xFFFFFFFF;
 180
 181       if (val > maxval)
 182         {
 183           /* xgettext:c-format */
 184           sprintf (errbuf,
 185                    _("operand out of range (0x%lx not between 0 and 0x%lx)"),
 186                    val, maxval);
 187           return errbuf;
 188         }
 189     }
 190   else
 191     {
 192       if (! cgen_signed_overflow_ok_p (cd))
 193         {
 194           long minval = - (1L << (length - 1));
 195           long maxval =   (1L << (length - 1)) - 1;
 196
 197           if (value < minval || value > maxval)
 198             {
 199               sprintf
 200                 /* xgettext:c-format */
 201                 (errbuf, _("operand out of range (%ld not between %ld and %ld)"),
 202                  value, minval, maxval);
 203               return errbuf;
 204             }
 205         }
 206     }
 207
 208 #if CGEN_INT_INSN_P
 209
 210   {
 211     int shift_within_word, shift_to_word, shift;
 212
 213     /* How to shift the value to BIT0 of the word.  */
 214     shift_to_word = total_length - (word_offset + word_length);
 215
 216     /* How to shift the value to the field within the word.  */
 217     if (CGEN_INSN_LSB0_P)
 218       shift_within_word = start + 1 - length;
 219     else
 220       shift_within_word = word_length - start - length;
 221
 222     /* The total SHIFT, then mask in the value.  */
 223     shift = shift_to_word + shift_within_word;
 224     *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift);
 225   }
 226
 227 #else /* ! CGEN_INT_INSN_P */
 228
 229   {
 230     unsigned char *bufp = (unsigned char *) buffer + word_offset / 8;
 231
 232     insert_1 (cd, value, start, length, word_length, bufp);
 233   }
 234
 235 #endif /* ! CGEN_INT_INSN_P */
 236
 237   return NULL;
 238 }
 239
 240 /* Default insn builder (insert handler).
 241    The instruction is recorded in CGEN_INT_INSN_P byte order (meaning
 242    that if CGEN_INSN_BYTES_PTR is an int * and thus, the value is
 243    recorded in host byte order, otherwise BUFFER is an array of bytes
 244    and the value is recorded in target byte order).
 245    The result is an error message or NULL if success.  */
 246
 247 static const char *
 248 insert_insn_normal (CGEN_CPU_DESC cd,
 249                     const CGEN_INSN * insn,
 250                     CGEN_FIELDS * fields,
 251                     CGEN_INSN_BYTES_PTR buffer,
 252                     bfd_vma pc)
 253 {
 254   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 255   unsigned long value;
 256   const CGEN_SYNTAX_CHAR_TYPE * syn;
 257
 258   CGEN_INIT_INSERT (cd);
 259   value = CGEN_INSN_BASE_VALUE (insn);
 260
 261   /* If we're recording insns as numbers (rather than a string of bytes),
 262      target byte order handling is deferred until later.  */
 263
 264 #if CGEN_INT_INSN_P
 265
 266   put_insn_int_value (cd, buffer, cd->base_insn_bitsize,
 267                       CGEN_FIELDS_BITSIZE (fields), value);
 268
 269 #else
 270
 271   cgen_put_insn_value (cd, buffer, min ((unsigned) cd->base_insn_bitsize,
 272                                         (unsigned) CGEN_FIELDS_BITSIZE (fields)),
 273                        value);
 274
 275 #endif /* ! CGEN_INT_INSN_P */
 276
 277   /* ??? It would be better to scan the format's fields.
 278      Still need to be able to insert a value based on the operand though;
 279      e.g. storing a branch displacement that got resolved later.
 280      Needs more thought first.  */
 281
 282   for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn)
 283     {
 284       const char *errmsg;
 285
 286       if (CGEN_SYNTAX_CHAR_P (* syn))
 287         continue;
 288
 289       errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
 290                                        fields, buffer, pc);
 291       if (errmsg)
 292         return errmsg;
 293     }
 294
 295   return NULL;
 296 }
 297
 298 #if CGEN_INT_INSN_P
 299 /* Cover function to store an insn value into an integral insn.  Must go here
 300    because it needs <prefix>-desc.h for CGEN_INT_INSN_P.  */
 301
 302 static void
 303 put_insn_int_value (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 304                     CGEN_INSN_BYTES_PTR buf,
 305                     int length,
 306                     int insn_length,
 307                     CGEN_INSN_INT value)
 308 {
 309   /* For architectures with insns smaller than the base-insn-bitsize,
 310      length may be too big.  */
 311   if (length > insn_length)
 312     *buf = value;
 313   else
 314     {
 315       int shift = insn_length - length;
 316       /* Written this way to avoid undefined behaviour.  */
 317       CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1;
 318
 319       *buf = (*buf & ~(mask << shift)) | ((value & mask) << shift);
 320     }
 321 }
 322 #endif
 323 \f
 324 /* Operand extraction.  */
 325
 326 #if ! CGEN_INT_INSN_P
 327
 328 /* Subroutine of extract_normal.
 329    Ensure sufficient bytes are cached in EX_INFO.
 330    OFFSET is the offset in bytes from the start of the insn of the value.
 331    BYTES is the length of the needed value.
 332    Returns 1 for success, 0 for failure.  */
 333
 334 static CGEN_INLINE int
 335 fill_cache (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 336             CGEN_EXTRACT_INFO *ex_info,
 337             int offset,
 338             int bytes,
 339             bfd_vma pc)
 340 {
 341   /* It's doubtful that the middle part has already been fetched so
 342      we don't optimize that case.  kiss.  */
 343   unsigned int mask;
 344   disassemble_info *info = (disassemble_info *) ex_info->dis_info;
 345
 346   /* First do a quick check.  */
 347   mask = (1 << bytes) - 1;
 348   if (((ex_info->valid >> offset) & mask) == mask)
 349     return 1;
 350
 351   /* Search for the first byte we need to read.  */
 352   for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1)
 353     if (! (mask & ex_info->valid))
 354       break;
 355
 356   if (bytes)
 357     {
 358       int status;
 359
 360       pc += offset;
 361       status = (*info->read_memory_func)
 362         (pc, ex_info->insn_bytes + offset, bytes, info);
 363
 364       if (status != 0)
 365         {
 366           (*info->memory_error_func) (status, pc, info);
 367           return 0;
 368         }
 369
 370       ex_info->valid |= ((1 << bytes) - 1) << offset;
 371     }
 372
 373   return 1;
 374 }
 375
 376 /* Subroutine of extract_normal.  */
 377
 378 static CGEN_INLINE long
 379 extract_1 (CGEN_CPU_DESC cd,
 380            CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
 381            int start,
 382            int length,
 383            int word_length,
 384            unsigned char *bufp,
 385            bfd_vma pc ATTRIBUTE_UNUSED)
 386 {
 387   unsigned long x;
 388   int shift;
 389
 390   x = cgen_get_insn_value (cd, bufp, word_length);
 391
 392   if (CGEN_INSN_LSB0_P)
 393     shift = (start + 1) - length;
 394   else
 395     shift = (word_length - (start + length));
 396   return x >> shift;
 397 }
 398
 399 #endif /* ! CGEN_INT_INSN_P */
 400
 401 /* Default extraction routine.
 402
 403    INSN_VALUE is the first base_insn_bitsize bits of the insn in host order,
 404    or sometimes less for cases like the m32r where the base insn size is 32
 405    but some insns are 16 bits.
 406    ATTRS is a mask of the boolean attributes.  We only need `SIGNED',
 407    but for generality we take a bitmask of all of them.
 408    WORD_OFFSET is the offset in bits from the start of the insn of the value.
 409    WORD_LENGTH is the length of the word in bits in which the value resides.
 410    START is the starting bit number in the word, architecture origin.
 411    LENGTH is the length of VALUE in bits.
 412    TOTAL_LENGTH is the total length of the insn in bits.
 413
 414    Returns 1 for success, 0 for failure.  */
 415
 416 /* ??? The return code isn't properly used.  wip.  */
 417
 418 /* ??? This doesn't handle bfd_vma's.  Create another function when
 419    necessary.  */
 420
 421 static int
 422 extract_normal (CGEN_CPU_DESC cd,
 423 #if ! CGEN_INT_INSN_P
 424                 CGEN_EXTRACT_INFO *ex_info,
 425 #else
 426                 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
 427 #endif
 428                 CGEN_INSN_INT insn_value,
 429                 unsigned int attrs,
 430                 unsigned int word_offset,
 431                 unsigned int start,
 432                 unsigned int length,
 433                 unsigned int word_length,
 434                 unsigned int total_length,
 435 #if ! CGEN_INT_INSN_P
 436                 bfd_vma pc,
 437 #else
 438                 bfd_vma pc ATTRIBUTE_UNUSED,
 439 #endif
 440                 long *valuep)
 441 {
 442   long value, mask;
 443
 444   /* If LENGTH is zero, this operand doesn't contribute to the value
 445      so give it a standard value of zero.  */
 446   if (length == 0)
 447     {
 448       *valuep = 0;
 449       return 1;
 450     }
 451
 452   if (word_length > 8 * sizeof (CGEN_INSN_INT))
 453     abort ();
 454
 455   /* For architectures with insns smaller than the insn-base-bitsize,
 456      word_length may be too big.  */
 457   if (cd->min_insn_bitsize < cd->base_insn_bitsize)
 458     {
 459       if (word_offset + word_length > total_length)
 460         word_length = total_length - word_offset;
 461     }
 462
 463   /* Does the value reside in INSN_VALUE, and at the right alignment?  */
 464
 465   if (CGEN_INT_INSN_P || (word_offset == 0 && word_length == total_length))
 466     {
 467       if (CGEN_INSN_LSB0_P)
 468         value = insn_value >> ((word_offset + start + 1) - length);
 469       else
 470         value = insn_value >> (total_length - ( word_offset + start + length));
 471     }
 472
 473 #if ! CGEN_INT_INSN_P
 474
 475   else
 476     {
 477       unsigned char *bufp = ex_info->insn_bytes + word_offset / 8;
 478
 479       if (word_length > 8 * sizeof (CGEN_INSN_INT))
 480         abort ();
 481
 482       if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0)
 483         {
 484           *valuep = 0;
 485           return 0;
 486         }
 487
 488       value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc);
 489     }
 490
 491 #endif /* ! CGEN_INT_INSN_P */
 492
 493   /* Written this way to avoid undefined behaviour.  */
 494   mask = (((1L << (length - 1)) - 1) << 1) | 1;
 495
 496   value &= mask;
 497   /* sign extend? */
 498   if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)
 499       && (value & (1L << (length - 1))))
 500     value |= ~mask;
 501
 502   *valuep = value;
 503
 504   return 1;
 505 }
 506
 507 /* Default insn extractor.
 508
 509    INSN_VALUE is the first base_insn_bitsize bits, translated to host order.
 510    The extracted fields are stored in FIELDS.
 511    EX_INFO is used to handle reading variable length insns.
 512    Return the length of the insn in bits, or 0 if no match,
 513    or -1 if an error occurs fetching data (memory_error_func will have
 514    been called).  */
 515
 516 static int
 517 extract_insn_normal (CGEN_CPU_DESC cd,
 518                      const CGEN_INSN *insn,
 519                      CGEN_EXTRACT_INFO *ex_info,
 520                      CGEN_INSN_INT insn_value,
 521                      CGEN_FIELDS *fields,
 522                      bfd_vma pc)
 523 {
 524   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 525   const CGEN_SYNTAX_CHAR_TYPE *syn;
 526
 527   CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
 528
 529   CGEN_INIT_EXTRACT (cd);
 530
 531   for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
 532     {
 533       int length;
 534
 535       if (CGEN_SYNTAX_CHAR_P (*syn))
 536         continue;
 537
 538       length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
 539                                         ex_info, insn_value, fields, pc);
 540       if (length <= 0)
 541         return length;
 542     }
 543
 544   /* We recognized and successfully extracted this insn.  */
 545   return CGEN_INSN_BITSIZE (insn);
 546 }
 547 \f
 548 /* Machine generated code added here.  */
 549
 550 const char * ip2k_cgen_insert_operand
 551   (CGEN_CPU_DESC, int, CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma);
 552
 553 /* Main entry point for operand insertion.
 554
 555    This function is basically just a big switch statement.  Earlier versions
 556    used tables to look up the function to use, but
 557    - if the table contains both assembler and disassembler functions then
 558      the disassembler contains much of the assembler and vice-versa,
 559    - there's a lot of inlining possibilities as things grow,
 560    - using a switch statement avoids the function call overhead.
 561
 562    This function could be moved into `parse_insn_normal', but keeping it
 563    separate makes clear the interface between `parse_insn_normal' and each of
 564    the handlers.  It's also needed by GAS to insert operands that couldn't be
 565    resolved during parsing.  */
 566
 567 const char *
 568 ip2k_cgen_insert_operand (CGEN_CPU_DESC cd,
 569                              int opindex,
 570                              CGEN_FIELDS * fields,
 571                              CGEN_INSN_BYTES_PTR buffer,
 572                              bfd_vma pc ATTRIBUTE_UNUSED)
 573 {
 574   const char * errmsg = NULL;
 575   unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
 576
 577   switch (opindex)
 578     {
 579     case IP2K_OPERAND_ADDR16CJP :
 580       errmsg = insert_normal (cd, fields->f_addr16cjp, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 12, 13, 16, total_length, buffer);
 581       break;
 582     case IP2K_OPERAND_ADDR16H :
 583       errmsg = insert_normal (cd, fields->f_imm8, 0, 0, 7, 8, 16, total_length, buffer);
 584       break;
 585     case IP2K_OPERAND_ADDR16L :
 586       errmsg = insert_normal (cd, fields->f_imm8, 0, 0, 7, 8, 16, total_length, buffer);
 587       break;
 588     case IP2K_OPERAND_ADDR16P :
 589       errmsg = insert_normal (cd, fields->f_page3, 0, 0, 2, 3, 16, total_length, buffer);
 590       break;
 591     case IP2K_OPERAND_BITNO :
 592       errmsg = insert_normal (cd, fields->f_bitno, 0, 0, 11, 3, 16, total_length, buffer);
 593       break;
 594     case IP2K_OPERAND_CBIT :
 595       break;
 596     case IP2K_OPERAND_DCBIT :
 597       break;
 598     case IP2K_OPERAND_FR :
 599       errmsg = insert_normal (cd, fields->f_reg, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 8, 9, 16, total_length, buffer);
 600       break;
 601     case IP2K_OPERAND_LIT8 :
 602       errmsg = insert_normal (cd, fields->f_imm8, 0, 0, 7, 8, 16, total_length, buffer);
 603       break;
 604     case IP2K_OPERAND_PABITS :
 605       break;
 606     case IP2K_OPERAND_RETI3 :
 607       errmsg = insert_normal (cd, fields->f_reti3, 0, 0, 2, 3, 16, total_length, buffer);
 608       break;
 609     case IP2K_OPERAND_ZBIT :
 610       break;
 611
 612     default :
 613       /* xgettext:c-format */
 614       opcodes_error_handler
 615         (_("internal error: unrecognized field %d while building insn"),
 616          opindex);
 617       abort ();
 618   }
 619
 620   return errmsg;
 621 }
 622
 623 int ip2k_cgen_extract_operand
 624   (CGEN_CPU_DESC, int, CGEN_EXTRACT_INFO *, CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
 625
 626 /* Main entry point for operand extraction.
 627    The result is <= 0 for error, >0 for success.
 628    ??? Actual values aren't well defined right now.
 629
 630    This function is basically just a big switch statement.  Earlier versions
 631    used tables to look up the function to use, but
 632    - if the table contains both assembler and disassembler functions then
 633      the disassembler contains much of the assembler and vice-versa,
 634    - there's a lot of inlining possibilities as things grow,
 635    - using a switch statement avoids the function call overhead.
 636
 637    This function could be moved into `print_insn_normal', but keeping it
 638    separate makes clear the interface between `print_insn_normal' and each of
 639    the handlers.  */
 640
 641 int
 642 ip2k_cgen_extract_operand (CGEN_CPU_DESC cd,
 643                              int opindex,
 644                              CGEN_EXTRACT_INFO *ex_info,
 645                              CGEN_INSN_INT insn_value,
 646                              CGEN_FIELDS * fields,
 647                              bfd_vma pc)
 648 {
 649   /* Assume success (for those operands that are nops).  */
 650   int length = 1;
 651   unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
 652
 653   switch (opindex)
 654     {
 655     case IP2K_OPERAND_ADDR16CJP :
 656       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 12, 13, 16, total_length, pc, & fields->f_addr16cjp);
 657       break;
 658     case IP2K_OPERAND_ADDR16H :
 659       length = extract_normal (cd, ex_info, insn_value, 0, 0, 7, 8, 16, total_length, pc, & fields->f_imm8);
 660       break;
 661     case IP2K_OPERAND_ADDR16L :
 662       length = extract_normal (cd, ex_info, insn_value, 0, 0, 7, 8, 16, total_length, pc, & fields->f_imm8);
 663       break;
 664     case IP2K_OPERAND_ADDR16P :
 665       length = extract_normal (cd, ex_info, insn_value, 0, 0, 2, 3, 16, total_length, pc, & fields->f_page3);
 666       break;
 667     case IP2K_OPERAND_BITNO :
 668       length = extract_normal (cd, ex_info, insn_value, 0, 0, 11, 3, 16, total_length, pc, & fields->f_bitno);
 669       break;
 670     case IP2K_OPERAND_CBIT :
 671       break;
 672     case IP2K_OPERAND_DCBIT :
 673       break;
 674     case IP2K_OPERAND_FR :
 675       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 8, 9, 16, total_length, pc, & fields->f_reg);
 676       break;
 677     case IP2K_OPERAND_LIT8 :
 678       length = extract_normal (cd, ex_info, insn_value, 0, 0, 7, 8, 16, total_length, pc, & fields->f_imm8);
 679       break;
 680     case IP2K_OPERAND_PABITS :
 681       break;
 682     case IP2K_OPERAND_RETI3 :
 683       length = extract_normal (cd, ex_info, insn_value, 0, 0, 2, 3, 16, total_length, pc, & fields->f_reti3);
 684       break;
 685     case IP2K_OPERAND_ZBIT :
 686       break;
 687
 688     default :
 689       /* xgettext:c-format */
 690       opcodes_error_handler
 691         (_("internal error: unrecognized field %d while decoding insn"),
 692          opindex);
 693       abort ();
 694     }
 695
 696   return length;
 697 }
 698
 699 cgen_insert_fn * const ip2k_cgen_insert_handlers[] =
 700 {
 701   insert_insn_normal,
 702 };
 703
 704 cgen_extract_fn * const ip2k_cgen_extract_handlers[] =
 705 {
 706   extract_insn_normal,
 707 };
 708
 709 int ip2k_cgen_get_int_operand     (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
 710 bfd_vma ip2k_cgen_get_vma_operand (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
 711
 712 /* Getting values from cgen_fields is handled by a collection of functions.
 713    They are distinguished by the type of the VALUE argument they return.
 714    TODO: floating point, inlining support, remove cases where result type
 715    not appropriate.  */
 716
 717 int
 718 ip2k_cgen_get_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 719                              int opindex,
 720                              const CGEN_FIELDS * fields)
 721 {
 722   int value;
 723
 724   switch (opindex)
 725     {
 726     case IP2K_OPERAND_ADDR16CJP :
 727       value = fields->f_addr16cjp;
 728       break;
 729     case IP2K_OPERAND_ADDR16H :
 730       value = fields->f_imm8;
 731       break;
 732     case IP2K_OPERAND_ADDR16L :
 733       value = fields->f_imm8;
 734       break;
 735     case IP2K_OPERAND_ADDR16P :
 736       value = fields->f_page3;
 737       break;
 738     case IP2K_OPERAND_BITNO :
 739       value = fields->f_bitno;
 740       break;
 741     case IP2K_OPERAND_CBIT :
 742       value = 0;
 743       break;
 744     case IP2K_OPERAND_DCBIT :
 745       value = 0;
 746       break;
 747     case IP2K_OPERAND_FR :
 748       value = fields->f_reg;
 749       break;
 750     case IP2K_OPERAND_LIT8 :
 751       value = fields->f_imm8;
 752       break;
 753     case IP2K_OPERAND_PABITS :
 754       value = 0;
 755       break;
 756     case IP2K_OPERAND_RETI3 :
 757       value = fields->f_reti3;
 758       break;
 759     case IP2K_OPERAND_ZBIT :
 760       value = 0;
 761       break;
 762
 763     default :
 764       /* xgettext:c-format */
 765       opcodes_error_handler
 766         (_("internal error: unrecognized field %d while getting int operand"),
 767          opindex);
 768       abort ();
 769   }
 770
 771   return value;
 772 }
 773
 774 bfd_vma
 775 ip2k_cgen_get_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 776                              int opindex,
 777                              const CGEN_FIELDS * fields)
 778 {
 779   bfd_vma value;
 780
 781   switch (opindex)
 782     {
 783     case IP2K_OPERAND_ADDR16CJP :
 784       value = fields->f_addr16cjp;
 785       break;
 786     case IP2K_OPERAND_ADDR16H :
 787       value = fields->f_imm8;
 788       break;
 789     case IP2K_OPERAND_ADDR16L :
 790       value = fields->f_imm8;
 791       break;
 792     case IP2K_OPERAND_ADDR16P :
 793       value = fields->f_page3;
 794       break;
 795     case IP2K_OPERAND_BITNO :
 796       value = fields->f_bitno;
 797       break;
 798     case IP2K_OPERAND_CBIT :
 799       value = 0;
 800       break;
 801     case IP2K_OPERAND_DCBIT :
 802       value = 0;
 803       break;
 804     case IP2K_OPERAND_FR :
 805       value = fields->f_reg;
 806       break;
 807     case IP2K_OPERAND_LIT8 :
 808       value = fields->f_imm8;
 809       break;
 810     case IP2K_OPERAND_PABITS :
 811       value = 0;
 812       break;
 813     case IP2K_OPERAND_RETI3 :
 814       value = fields->f_reti3;
 815       break;
 816     case IP2K_OPERAND_ZBIT :
 817       value = 0;
 818       break;
 819
 820     default :
 821       /* xgettext:c-format */
 822       opcodes_error_handler
 823         (_("internal error: unrecognized field %d while getting vma operand"),
 824          opindex);
 825       abort ();
 826   }
 827
 828   return value;
 829 }
 830
 831 void ip2k_cgen_set_int_operand  (CGEN_CPU_DESC, int, CGEN_FIELDS *, int);
 832 void ip2k_cgen_set_vma_operand  (CGEN_CPU_DESC, int, CGEN_FIELDS *, bfd_vma);
 833
 834 /* Stuffing values in cgen_fields is handled by a collection of functions.
 835    They are distinguished by the type of the VALUE argument they accept.
 836    TODO: floating point, inlining support, remove cases where argument type
 837    not appropriate.  */
 838
 839 void
 840 ip2k_cgen_set_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 841                              int opindex,
 842                              CGEN_FIELDS * fields,
 843                              int value)
 844 {
 845   switch (opindex)
 846     {
 847     case IP2K_OPERAND_ADDR16CJP :
 848       fields->f_addr16cjp = value;
 849       break;
 850     case IP2K_OPERAND_ADDR16H :
 851       fields->f_imm8 = value;
 852       break;
 853     case IP2K_OPERAND_ADDR16L :
 854       fields->f_imm8 = value;
 855       break;
 856     case IP2K_OPERAND_ADDR16P :
 857       fields->f_page3 = value;
 858       break;
 859     case IP2K_OPERAND_BITNO :
 860       fields->f_bitno = value;
 861       break;
 862     case IP2K_OPERAND_CBIT :
 863       break;
 864     case IP2K_OPERAND_DCBIT :
 865       break;
 866     case IP2K_OPERAND_FR :
 867       fields->f_reg = value;
 868       break;
 869     case IP2K_OPERAND_LIT8 :
 870       fields->f_imm8 = value;
 871       break;
 872     case IP2K_OPERAND_PABITS :
 873       break;
 874     case IP2K_OPERAND_RETI3 :
 875       fields->f_reti3 = value;
 876       break;
 877     case IP2K_OPERAND_ZBIT :
 878       break;
 879
 880     default :
 881       /* xgettext:c-format */
 882       opcodes_error_handler
 883         (_("internal error: unrecognized field %d while setting int operand"),
 884          opindex);
 885       abort ();
 886   }
 887 }
 888
 889 void
 890 ip2k_cgen_set_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 891                              int opindex,
 892                              CGEN_FIELDS * fields,
 893                              bfd_vma value)
 894 {
 895   switch (opindex)
 896     {
 897     case IP2K_OPERAND_ADDR16CJP :
 898       fields->f_addr16cjp = value;
 899       break;
 900     case IP2K_OPERAND_ADDR16H :
 901       fields->f_imm8 = value;
 902       break;
 903     case IP2K_OPERAND_ADDR16L :
 904       fields->f_imm8 = value;
 905       break;
 906     case IP2K_OPERAND_ADDR16P :
 907       fields->f_page3 = value;
 908       break;
 909     case IP2K_OPERAND_BITNO :
 910       fields->f_bitno = value;
 911       break;
 912     case IP2K_OPERAND_CBIT :
 913       break;
 914     case IP2K_OPERAND_DCBIT :
 915       break;
 916     case IP2K_OPERAND_FR :
 917       fields->f_reg = value;
 918       break;
 919     case IP2K_OPERAND_LIT8 :
 920       fields->f_imm8 = value;
 921       break;
 922     case IP2K_OPERAND_PABITS :
 923       break;
 924     case IP2K_OPERAND_RETI3 :
 925       fields->f_reti3 = value;
 926       break;
 927     case IP2K_OPERAND_ZBIT :
 928       break;
 929
 930     default :
 931       /* xgettext:c-format */
 932       opcodes_error_handler
 933         (_("internal error: unrecognized field %d while setting vma operand"),
 934          opindex);
 935       abort ();
 936   }
 937 }
 938
 939 /* Function to call before using the instruction builder tables.  */
 940
 941 void
 942 ip2k_cgen_init_ibld_table (CGEN_CPU_DESC cd)
 943 {
 944   cd->insert_handlers = & ip2k_cgen_insert_handlers[0];
 945   cd->extract_handlers = & ip2k_cgen_extract_handlers[0];
 946
 947   cd->insert_operand = ip2k_cgen_insert_operand;
 948   cd->extract_operand = ip2k_cgen_extract_operand;
 949
 950   cd->get_int_operand = ip2k_cgen_get_int_operand;
 951   cd->set_int_operand = ip2k_cgen_set_int_operand;
 952   cd->get_vma_operand = ip2k_cgen_get_vma_operand;
 953   cd->set_vma_operand = ip2k_cgen_set_vma_operand;
 954 }