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) 1996-2024 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, cd->endian);
  92
  93   /* Written this way to avoid undefined behaviour.  */
  94   mask = (1UL << (length - 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, cd->endian);
 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   unsigned long mask;
 135
 136   /* If LENGTH is zero, this operand doesn't contribute to the value.  */
 137   if (length == 0)
 138     return NULL;
 139
 140   /* Written this way to avoid undefined behaviour.  */
 141   mask = (1UL << (length - 1) << 1) - 1;
 142
 143   if (word_length > 8 * sizeof (CGEN_INSN_INT))
 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 = - (1UL << (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       unsigned long val = (unsigned long) value;
 175
 176       /* For hosts with a word size > 32 check to see if value has been sign
 177          extended beyond 32 bits.  If so then ignore these higher sign bits
 178          as the user is attempting to store a 32-bit signed value into an
 179          unsigned 32-bit field which is allowed.  */
 180       if (sizeof (unsigned long) > 4 && ((value >> 32) == -1))
 181         val &= 0xFFFFFFFF;
 182
 183       if (val > maxval)
 184         {
 185           /* xgettext:c-format */
 186           sprintf (errbuf,
 187                    _("operand out of range (0x%lx not between 0 and 0x%lx)"),
 188                    val, maxval);
 189           return errbuf;
 190         }
 191     }
 192   else
 193     {
 194       if (! cgen_signed_overflow_ok_p (cd))
 195         {
 196           long minval = - (1UL << (length - 1));
 197           long maxval =   (1UL << (length - 1)) - 1;
 198
 199           if (value < minval || value > maxval)
 200             {
 201               sprintf
 202                 /* xgettext:c-format */
 203                 (errbuf, _("operand out of range (%ld not between %ld and %ld)"),
 204                  value, minval, maxval);
 205               return errbuf;
 206             }
 207         }
 208     }
 209
 210 #if CGEN_INT_INSN_P
 211
 212   {
 213     int shift_within_word, shift_to_word, shift;
 214
 215     /* How to shift the value to BIT0 of the word.  */
 216     shift_to_word = total_length - (word_offset + word_length);
 217
 218     /* How to shift the value to the field within the word.  */
 219     if (CGEN_INSN_LSB0_P)
 220       shift_within_word = start + 1 - length;
 221     else
 222       shift_within_word = word_length - start - length;
 223
 224     /* The total SHIFT, then mask in the value.  */
 225     shift = shift_to_word + shift_within_word;
 226     *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift);
 227   }
 228
 229 #else /* ! CGEN_INT_INSN_P */
 230
 231   {
 232     unsigned char *bufp = (unsigned char *) buffer + word_offset / 8;
 233
 234     insert_1 (cd, value, start, length, word_length, bufp);
 235   }
 236
 237 #endif /* ! CGEN_INT_INSN_P */
 238
 239   return NULL;
 240 }
 241
 242 /* Default insn builder (insert handler).
 243    The instruction is recorded in CGEN_INT_INSN_P byte order (meaning
 244    that if CGEN_INSN_BYTES_PTR is an int * and thus, the value is
 245    recorded in host byte order, otherwise BUFFER is an array of bytes
 246    and the value is recorded in target byte order).
 247    The result is an error message or NULL if success.  */
 248
 249 static const char *
 250 insert_insn_normal (CGEN_CPU_DESC cd,
 251                     const CGEN_INSN * insn,
 252                     CGEN_FIELDS * fields,
 253                     CGEN_INSN_BYTES_PTR buffer,
 254                     bfd_vma pc)
 255 {
 256   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 257   unsigned long value;
 258   const CGEN_SYNTAX_CHAR_TYPE * syn;
 259
 260   CGEN_INIT_INSERT (cd);
 261   value = CGEN_INSN_BASE_VALUE (insn);
 262
 263   /* If we're recording insns as numbers (rather than a string of bytes),
 264      target byte order handling is deferred until later.  */
 265
 266 #if CGEN_INT_INSN_P
 267
 268   put_insn_int_value (cd, buffer, cd->base_insn_bitsize,
 269                       CGEN_FIELDS_BITSIZE (fields), value);
 270
 271 #else
 272
 273   cgen_put_insn_value (cd, buffer, min ((unsigned) cd->base_insn_bitsize,
 274                                         (unsigned) CGEN_FIELDS_BITSIZE (fields)),
 275                        value, cd->insn_endian);
 276
 277 #endif /* ! CGEN_INT_INSN_P */
 278
 279   /* ??? It would be better to scan the format's fields.
 280      Still need to be able to insert a value based on the operand though;
 281      e.g. storing a branch displacement that got resolved later.
 282      Needs more thought first.  */
 283
 284   for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn)
 285     {
 286       const char *errmsg;
 287
 288       if (CGEN_SYNTAX_CHAR_P (* syn))
 289         continue;
 290
 291       errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
 292                                        fields, buffer, pc);
 293       if (errmsg)
 294         return errmsg;
 295     }
 296
 297   return NULL;
 298 }
 299
 300 #if CGEN_INT_INSN_P
 301 /* Cover function to store an insn value into an integral insn.  Must go here
 302    because it needs <prefix>-desc.h for CGEN_INT_INSN_P.  */
 303
 304 static void
 305 put_insn_int_value (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 306                     CGEN_INSN_BYTES_PTR buf,
 307                     int length,
 308                     int insn_length,
 309                     CGEN_INSN_INT value)
 310 {
 311   /* For architectures with insns smaller than the base-insn-bitsize,
 312      length may be too big.  */
 313   if (length > insn_length)
 314     *buf = value;
 315   else
 316     {
 317       int shift = insn_length - length;
 318       /* Written this way to avoid undefined behaviour.  */
 319       CGEN_INSN_INT mask = length == 0 ? 0 : (1UL << (length - 1) << 1) - 1;
 320
 321       *buf = (*buf & ~(mask << shift)) | ((value & mask) << shift);
 322     }
 323 }
 324 #endif
 325 \f
 326 /* Operand extraction.  */
 327
 328 #if ! CGEN_INT_INSN_P
 329
 330 /* Subroutine of extract_normal.
 331    Ensure sufficient bytes are cached in EX_INFO.
 332    OFFSET is the offset in bytes from the start of the insn of the value.
 333    BYTES is the length of the needed value.
 334    Returns 1 for success, 0 for failure.  */
 335
 336 static CGEN_INLINE int
 337 fill_cache (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 338             CGEN_EXTRACT_INFO *ex_info,
 339             int offset,
 340             int bytes,
 341             bfd_vma pc)
 342 {
 343   /* It's doubtful that the middle part has already been fetched so
 344      we don't optimize that case.  kiss.  */
 345   unsigned int mask;
 346   disassemble_info *info = (disassemble_info *) ex_info->dis_info;
 347
 348   /* First do a quick check.  */
 349   mask = (1 << bytes) - 1;
 350   if (((ex_info->valid >> offset) & mask) == mask)
 351     return 1;
 352
 353   /* Search for the first byte we need to read.  */
 354   for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1)
 355     if (! (mask & ex_info->valid))
 356       break;
 357
 358   if (bytes)
 359     {
 360       int status;
 361
 362       pc += offset;
 363       status = (*info->read_memory_func)
 364         (pc, ex_info->insn_bytes + offset, bytes, info);
 365
 366       if (status != 0)
 367         {
 368           (*info->memory_error_func) (status, pc, info);
 369           return 0;
 370         }
 371
 372       ex_info->valid |= ((1 << bytes) - 1) << offset;
 373     }
 374
 375   return 1;
 376 }
 377
 378 /* Subroutine of extract_normal.  */
 379
 380 static CGEN_INLINE long
 381 extract_1 (CGEN_CPU_DESC cd,
 382            CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
 383            int start,
 384            int length,
 385            int word_length,
 386            unsigned char *bufp,
 387            bfd_vma pc ATTRIBUTE_UNUSED)
 388 {
 389   unsigned long x;
 390   int shift;
 391
 392   x = cgen_get_insn_value (cd, bufp, word_length, cd->endian);
 393
 394   if (CGEN_INSN_LSB0_P)
 395     shift = (start + 1) - length;
 396   else
 397     shift = (word_length - (start + length));
 398   return x >> shift;
 399 }
 400
 401 #endif /* ! CGEN_INT_INSN_P */
 402
 403 /* Default extraction routine.
 404
 405    INSN_VALUE is the first base_insn_bitsize bits of the insn in host order,
 406    or sometimes less for cases like the m32r where the base insn size is 32
 407    but some insns are 16 bits.
 408    ATTRS is a mask of the boolean attributes.  We only need `SIGNED',
 409    but for generality we take a bitmask of all of them.
 410    WORD_OFFSET is the offset in bits from the start of the insn of the value.
 411    WORD_LENGTH is the length of the word in bits in which the value resides.
 412    START is the starting bit number in the word, architecture origin.
 413    LENGTH is the length of VALUE in bits.
 414    TOTAL_LENGTH is the total length of the insn in bits.
 415
 416    Returns 1 for success, 0 for failure.  */
 417
 418 /* ??? The return code isn't properly used.  wip.  */
 419
 420 /* ??? This doesn't handle bfd_vma's.  Create another function when
 421    necessary.  */
 422
 423 static int
 424 extract_normal (CGEN_CPU_DESC cd,
 425 #if ! CGEN_INT_INSN_P
 426                 CGEN_EXTRACT_INFO *ex_info,
 427 #else
 428                 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
 429 #endif
 430                 CGEN_INSN_INT insn_value,
 431                 unsigned int attrs,
 432                 unsigned int word_offset,
 433                 unsigned int start,
 434                 unsigned int length,
 435                 unsigned int word_length,
 436                 unsigned int total_length,
 437 #if ! CGEN_INT_INSN_P
 438                 bfd_vma pc,
 439 #else
 440                 bfd_vma pc ATTRIBUTE_UNUSED,
 441 #endif
 442                 long *valuep)
 443 {
 444   long value, mask;
 445
 446   /* If LENGTH is zero, this operand doesn't contribute to the value
 447      so give it a standard value of zero.  */
 448   if (length == 0)
 449     {
 450       *valuep = 0;
 451       return 1;
 452     }
 453
 454   if (word_length > 8 * sizeof (CGEN_INSN_INT))
 455     abort ();
 456
 457   /* For architectures with insns smaller than the insn-base-bitsize,
 458      word_length may be too big.  */
 459   if (cd->min_insn_bitsize < cd->base_insn_bitsize)
 460     {
 461       if (word_offset + word_length > total_length)
 462         word_length = total_length - word_offset;
 463     }
 464
 465   /* Does the value reside in INSN_VALUE, and at the right alignment?  */
 466
 467   if (CGEN_INT_INSN_P || (word_offset == 0 && word_length == total_length))
 468     {
 469       if (CGEN_INSN_LSB0_P)
 470         value = insn_value >> ((word_offset + start + 1) - length);
 471       else
 472         value = insn_value >> (total_length - ( word_offset + start + length));
 473     }
 474
 475 #if ! CGEN_INT_INSN_P
 476
 477   else
 478     {
 479       unsigned char *bufp = ex_info->insn_bytes + word_offset / 8;
 480
 481       if (word_length > 8 * sizeof (CGEN_INSN_INT))
 482         abort ();
 483
 484       if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0)
 485         {
 486           *valuep = 0;
 487           return 0;
 488         }
 489
 490       value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc);
 491     }
 492
 493 #endif /* ! CGEN_INT_INSN_P */
 494
 495   /* Written this way to avoid undefined behaviour.  */
 496   mask = (1UL << (length - 1) << 1) - 1;
 497
 498   value &= mask;
 499   /* sign extend? */
 500   if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)
 501       && (value & (1UL << (length - 1))))
 502     value |= ~mask;
 503
 504   *valuep = value;
 505
 506   return 1;
 507 }
 508
 509 /* Default insn extractor.
 510
 511    INSN_VALUE is the first base_insn_bitsize bits, translated to host order.
 512    The extracted fields are stored in FIELDS.
 513    EX_INFO is used to handle reading variable length insns.
 514    Return the length of the insn in bits, or 0 if no match,
 515    or -1 if an error occurs fetching data (memory_error_func will have
 516    been called).  */
 517
 518 static int
 519 extract_insn_normal (CGEN_CPU_DESC cd,
 520                      const CGEN_INSN *insn,
 521                      CGEN_EXTRACT_INFO *ex_info,
 522                      CGEN_INSN_INT insn_value,
 523                      CGEN_FIELDS *fields,
 524                      bfd_vma pc)
 525 {
 526   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 527   const CGEN_SYNTAX_CHAR_TYPE *syn;
 528
 529   CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
 530
 531   CGEN_INIT_EXTRACT (cd);
 532
 533   for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
 534     {
 535       int length;
 536
 537       if (CGEN_SYNTAX_CHAR_P (*syn))
 538         continue;
 539
 540       length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
 541                                         ex_info, insn_value, fields, pc);
 542       if (length <= 0)
 543         return length;
 544     }
 545
 546   /* We recognized and successfully extracted this insn.  */
 547   return CGEN_INSN_BITSIZE (insn);
 548 }
 549 \f
 550 /* Machine generated code added here.  */
 551
 552 const char * ip2k_cgen_insert_operand
 553   (CGEN_CPU_DESC, int, CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma);
 554
 555 /* Main entry point for operand insertion.
 556
 557    This function is basically just a big switch statement.  Earlier versions
 558    used tables to look up the function to use, but
 559    - if the table contains both assembler and disassembler functions then
 560      the disassembler contains much of the assembler and vice-versa,
 561    - there's a lot of inlining possibilities as things grow,
 562    - using a switch statement avoids the function call overhead.
 563
 564    This function could be moved into `parse_insn_normal', but keeping it
 565    separate makes clear the interface between `parse_insn_normal' and each of
 566    the handlers.  It's also needed by GAS to insert operands that couldn't be
 567    resolved during parsing.  */
 568
 569 const char *
 570 ip2k_cgen_insert_operand (CGEN_CPU_DESC cd,
 571                              int opindex,
 572                              CGEN_FIELDS * fields,
 573                              CGEN_INSN_BYTES_PTR buffer,
 574                              bfd_vma pc ATTRIBUTE_UNUSED)
 575 {
 576   const char * errmsg = NULL;
 577   unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
 578
 579   switch (opindex)
 580     {
 581     case IP2K_OPERAND_ADDR16CJP :
 582       errmsg = insert_normal (cd, fields->f_addr16cjp, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 12, 13, 16, total_length, buffer);
 583       break;
 584     case IP2K_OPERAND_ADDR16H :
 585       errmsg = insert_normal (cd, fields->f_imm8, 0, 0, 7, 8, 16, total_length, buffer);
 586       break;
 587     case IP2K_OPERAND_ADDR16L :
 588       errmsg = insert_normal (cd, fields->f_imm8, 0, 0, 7, 8, 16, total_length, buffer);
 589       break;
 590     case IP2K_OPERAND_ADDR16P :
 591       errmsg = insert_normal (cd, fields->f_page3, 0, 0, 2, 3, 16, total_length, buffer);
 592       break;
 593     case IP2K_OPERAND_BITNO :
 594       errmsg = insert_normal (cd, fields->f_bitno, 0, 0, 11, 3, 16, total_length, buffer);
 595       break;
 596     case IP2K_OPERAND_CBIT :
 597       break;
 598     case IP2K_OPERAND_DCBIT :
 599       break;
 600     case IP2K_OPERAND_FR :
 601       errmsg = insert_normal (cd, fields->f_reg, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 8, 9, 16, total_length, buffer);
 602       break;
 603     case IP2K_OPERAND_LIT8 :
 604       errmsg = insert_normal (cd, fields->f_imm8, 0, 0, 7, 8, 16, total_length, buffer);
 605       break;
 606     case IP2K_OPERAND_PABITS :
 607       break;
 608     case IP2K_OPERAND_RETI3 :
 609       errmsg = insert_normal (cd, fields->f_reti3, 0, 0, 2, 3, 16, total_length, buffer);
 610       break;
 611     case IP2K_OPERAND_ZBIT :
 612       break;
 613
 614     default :
 615       /* xgettext:c-format */
 616       opcodes_error_handler
 617         (_("internal error: unrecognized field %d while building insn"),
 618          opindex);
 619       abort ();
 620   }
 621
 622   return errmsg;
 623 }
 624
 625 int ip2k_cgen_extract_operand
 626   (CGEN_CPU_DESC, int, CGEN_EXTRACT_INFO *, CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
 627
 628 /* Main entry point for operand extraction.
 629    The result is <= 0 for error, >0 for success.
 630    ??? Actual values aren't well defined right now.
 631
 632    This function is basically just a big switch statement.  Earlier versions
 633    used tables to look up the function to use, but
 634    - if the table contains both assembler and disassembler functions then
 635      the disassembler contains much of the assembler and vice-versa,
 636    - there's a lot of inlining possibilities as things grow,
 637    - using a switch statement avoids the function call overhead.
 638
 639    This function could be moved into `print_insn_normal', but keeping it
 640    separate makes clear the interface between `print_insn_normal' and each of
 641    the handlers.  */
 642
 643 int
 644 ip2k_cgen_extract_operand (CGEN_CPU_DESC cd,
 645                              int opindex,
 646                              CGEN_EXTRACT_INFO *ex_info,
 647                              CGEN_INSN_INT insn_value,
 648                              CGEN_FIELDS * fields,
 649                              bfd_vma pc)
 650 {
 651   /* Assume success (for those operands that are nops).  */
 652   int length = 1;
 653   unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
 654
 655   switch (opindex)
 656     {
 657     case IP2K_OPERAND_ADDR16CJP :
 658       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 12, 13, 16, total_length, pc, & fields->f_addr16cjp);
 659       break;
 660     case IP2K_OPERAND_ADDR16H :
 661       length = extract_normal (cd, ex_info, insn_value, 0, 0, 7, 8, 16, total_length, pc, & fields->f_imm8);
 662       break;
 663     case IP2K_OPERAND_ADDR16L :
 664       length = extract_normal (cd, ex_info, insn_value, 0, 0, 7, 8, 16, total_length, pc, & fields->f_imm8);
 665       break;
 666     case IP2K_OPERAND_ADDR16P :
 667       length = extract_normal (cd, ex_info, insn_value, 0, 0, 2, 3, 16, total_length, pc, & fields->f_page3);
 668       break;
 669     case IP2K_OPERAND_BITNO :
 670       length = extract_normal (cd, ex_info, insn_value, 0, 0, 11, 3, 16, total_length, pc, & fields->f_bitno);
 671       break;
 672     case IP2K_OPERAND_CBIT :
 673       break;
 674     case IP2K_OPERAND_DCBIT :
 675       break;
 676     case IP2K_OPERAND_FR :
 677       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 8, 9, 16, total_length, pc, & fields->f_reg);
 678       break;
 679     case IP2K_OPERAND_LIT8 :
 680       length = extract_normal (cd, ex_info, insn_value, 0, 0, 7, 8, 16, total_length, pc, & fields->f_imm8);
 681       break;
 682     case IP2K_OPERAND_PABITS :
 683       break;
 684     case IP2K_OPERAND_RETI3 :
 685       length = extract_normal (cd, ex_info, insn_value, 0, 0, 2, 3, 16, total_length, pc, & fields->f_reti3);
 686       break;
 687     case IP2K_OPERAND_ZBIT :
 688       break;
 689
 690     default :
 691       /* xgettext:c-format */
 692       opcodes_error_handler
 693         (_("internal error: unrecognized field %d while decoding insn"),
 694          opindex);
 695       abort ();
 696     }
 697
 698   return length;
 699 }
 700
 701 cgen_insert_fn * const ip2k_cgen_insert_handlers[] =
 702 {
 703   insert_insn_normal,
 704 };
 705
 706 cgen_extract_fn * const ip2k_cgen_extract_handlers[] =
 707 {
 708   extract_insn_normal,
 709 };
 710
 711 int ip2k_cgen_get_int_operand     (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
 712 bfd_vma ip2k_cgen_get_vma_operand (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
 713
 714 /* Getting values from cgen_fields is handled by a collection of functions.
 715    They are distinguished by the type of the VALUE argument they return.
 716    TODO: floating point, inlining support, remove cases where result type
 717    not appropriate.  */
 718
 719 int
 720 ip2k_cgen_get_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 721                              int opindex,
 722                              const CGEN_FIELDS * fields)
 723 {
 724   int value;
 725
 726   switch (opindex)
 727     {
 728     case IP2K_OPERAND_ADDR16CJP :
 729       value = fields->f_addr16cjp;
 730       break;
 731     case IP2K_OPERAND_ADDR16H :
 732       value = fields->f_imm8;
 733       break;
 734     case IP2K_OPERAND_ADDR16L :
 735       value = fields->f_imm8;
 736       break;
 737     case IP2K_OPERAND_ADDR16P :
 738       value = fields->f_page3;
 739       break;
 740     case IP2K_OPERAND_BITNO :
 741       value = fields->f_bitno;
 742       break;
 743     case IP2K_OPERAND_CBIT :
 744       value = 0;
 745       break;
 746     case IP2K_OPERAND_DCBIT :
 747       value = 0;
 748       break;
 749     case IP2K_OPERAND_FR :
 750       value = fields->f_reg;
 751       break;
 752     case IP2K_OPERAND_LIT8 :
 753       value = fields->f_imm8;
 754       break;
 755     case IP2K_OPERAND_PABITS :
 756       value = 0;
 757       break;
 758     case IP2K_OPERAND_RETI3 :
 759       value = fields->f_reti3;
 760       break;
 761     case IP2K_OPERAND_ZBIT :
 762       value = 0;
 763       break;
 764
 765     default :
 766       /* xgettext:c-format */
 767       opcodes_error_handler
 768         (_("internal error: unrecognized field %d while getting int operand"),
 769          opindex);
 770       abort ();
 771   }
 772
 773   return value;
 774 }
 775
 776 bfd_vma
 777 ip2k_cgen_get_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 778                              int opindex,
 779                              const CGEN_FIELDS * fields)
 780 {
 781   bfd_vma value;
 782
 783   switch (opindex)
 784     {
 785     case IP2K_OPERAND_ADDR16CJP :
 786       value = fields->f_addr16cjp;
 787       break;
 788     case IP2K_OPERAND_ADDR16H :
 789       value = fields->f_imm8;
 790       break;
 791     case IP2K_OPERAND_ADDR16L :
 792       value = fields->f_imm8;
 793       break;
 794     case IP2K_OPERAND_ADDR16P :
 795       value = fields->f_page3;
 796       break;
 797     case IP2K_OPERAND_BITNO :
 798       value = fields->f_bitno;
 799       break;
 800     case IP2K_OPERAND_CBIT :
 801       value = 0;
 802       break;
 803     case IP2K_OPERAND_DCBIT :
 804       value = 0;
 805       break;
 806     case IP2K_OPERAND_FR :
 807       value = fields->f_reg;
 808       break;
 809     case IP2K_OPERAND_LIT8 :
 810       value = fields->f_imm8;
 811       break;
 812     case IP2K_OPERAND_PABITS :
 813       value = 0;
 814       break;
 815     case IP2K_OPERAND_RETI3 :
 816       value = fields->f_reti3;
 817       break;
 818     case IP2K_OPERAND_ZBIT :
 819       value = 0;
 820       break;
 821
 822     default :
 823       /* xgettext:c-format */
 824       opcodes_error_handler
 825         (_("internal error: unrecognized field %d while getting vma operand"),
 826          opindex);
 827       abort ();
 828   }
 829
 830   return value;
 831 }
 832
 833 void ip2k_cgen_set_int_operand  (CGEN_CPU_DESC, int, CGEN_FIELDS *, int);
 834 void ip2k_cgen_set_vma_operand  (CGEN_CPU_DESC, int, CGEN_FIELDS *, bfd_vma);
 835
 836 /* Stuffing values in cgen_fields is handled by a collection of functions.
 837    They are distinguished by the type of the VALUE argument they accept.
 838    TODO: floating point, inlining support, remove cases where argument type
 839    not appropriate.  */
 840
 841 void
 842 ip2k_cgen_set_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 843                              int opindex,
 844                              CGEN_FIELDS * fields,
 845                              int value)
 846 {
 847   switch (opindex)
 848     {
 849     case IP2K_OPERAND_ADDR16CJP :
 850       fields->f_addr16cjp = value;
 851       break;
 852     case IP2K_OPERAND_ADDR16H :
 853       fields->f_imm8 = value;
 854       break;
 855     case IP2K_OPERAND_ADDR16L :
 856       fields->f_imm8 = value;
 857       break;
 858     case IP2K_OPERAND_ADDR16P :
 859       fields->f_page3 = value;
 860       break;
 861     case IP2K_OPERAND_BITNO :
 862       fields->f_bitno = value;
 863       break;
 864     case IP2K_OPERAND_CBIT :
 865       break;
 866     case IP2K_OPERAND_DCBIT :
 867       break;
 868     case IP2K_OPERAND_FR :
 869       fields->f_reg = value;
 870       break;
 871     case IP2K_OPERAND_LIT8 :
 872       fields->f_imm8 = value;
 873       break;
 874     case IP2K_OPERAND_PABITS :
 875       break;
 876     case IP2K_OPERAND_RETI3 :
 877       fields->f_reti3 = value;
 878       break;
 879     case IP2K_OPERAND_ZBIT :
 880       break;
 881
 882     default :
 883       /* xgettext:c-format */
 884       opcodes_error_handler
 885         (_("internal error: unrecognized field %d while setting int operand"),
 886          opindex);
 887       abort ();
 888   }
 889 }
 890
 891 void
 892 ip2k_cgen_set_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 893                              int opindex,
 894                              CGEN_FIELDS * fields,
 895                              bfd_vma value)
 896 {
 897   switch (opindex)
 898     {
 899     case IP2K_OPERAND_ADDR16CJP :
 900       fields->f_addr16cjp = value;
 901       break;
 902     case IP2K_OPERAND_ADDR16H :
 903       fields->f_imm8 = value;
 904       break;
 905     case IP2K_OPERAND_ADDR16L :
 906       fields->f_imm8 = value;
 907       break;
 908     case IP2K_OPERAND_ADDR16P :
 909       fields->f_page3 = value;
 910       break;
 911     case IP2K_OPERAND_BITNO :
 912       fields->f_bitno = value;
 913       break;
 914     case IP2K_OPERAND_CBIT :
 915       break;
 916     case IP2K_OPERAND_DCBIT :
 917       break;
 918     case IP2K_OPERAND_FR :
 919       fields->f_reg = value;
 920       break;
 921     case IP2K_OPERAND_LIT8 :
 922       fields->f_imm8 = value;
 923       break;
 924     case IP2K_OPERAND_PABITS :
 925       break;
 926     case IP2K_OPERAND_RETI3 :
 927       fields->f_reti3 = value;
 928       break;
 929     case IP2K_OPERAND_ZBIT :
 930       break;
 931
 932     default :
 933       /* xgettext:c-format */
 934       opcodes_error_handler
 935         (_("internal error: unrecognized field %d while setting vma operand"),
 936          opindex);
 937       abort ();
 938   }
 939 }
 940
 941 /* Function to call before using the instruction builder tables.  */
 942
 943 void
 944 ip2k_cgen_init_ibld_table (CGEN_CPU_DESC cd)
 945 {
 946   cd->insert_handlers = & ip2k_cgen_insert_handlers[0];
 947   cd->extract_handlers = & ip2k_cgen_extract_handlers[0];
 948
 949   cd->insert_operand = ip2k_cgen_insert_operand;
 950   cd->extract_operand = ip2k_cgen_extract_operand;
 951
 952   cd->get_int_operand = ip2k_cgen_get_int_operand;
 953   cd->set_int_operand = ip2k_cgen_set_int_operand;
 954   cd->get_vma_operand = ip2k_cgen_get_vma_operand;
 955   cd->set_vma_operand = ip2k_cgen_set_vma_operand;
 956 }