opcodes/lm32-ibld.c

   1 /* Instruction building/extraction support for lm32. -*- 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, 2005, 2006, 2007,
   7    2008  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 "lm32-desc.h"
  35 #include "lm32-opc.h"
  36 #include "opintl.h"
  37 #include "safe-ctype.h"
  38
  39 #undef  min
  40 #define min(a,b) ((a) < (b) ? (a) : (b))
  41 #undef  max
  42 #define max(a,b) ((a) > (b) ? (a) : (b))
  43
  44 /* Used by the ifield rtx function.  */
  45 #define FLD(f) (fields->f)
  46
  47 static const char * insert_normal
  48   (CGEN_CPU_DESC, long, unsigned int, unsigned int, unsigned int,
  49    unsigned int, unsigned int, unsigned int, CGEN_INSN_BYTES_PTR);
  50 static const char * insert_insn_normal
  51   (CGEN_CPU_DESC, const CGEN_INSN *,
  52    CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma);
  53 static int extract_normal
  54   (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, CGEN_INSN_INT,
  55    unsigned int, unsigned int, unsigned int, unsigned int,
  56    unsigned int, unsigned int, bfd_vma, long *);
  57 static int extract_insn_normal
  58   (CGEN_CPU_DESC, const CGEN_INSN *, CGEN_EXTRACT_INFO *,
  59    CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
  60 #if CGEN_INT_INSN_P
  61 static void put_insn_int_value
  62   (CGEN_CPU_DESC, CGEN_INSN_BYTES_PTR, int, int, CGEN_INSN_INT);
  63 #endif
  64 #if ! CGEN_INT_INSN_P
  65 static CGEN_INLINE void insert_1
  66   (CGEN_CPU_DESC, unsigned long, int, int, int, unsigned char *);
  67 static CGEN_INLINE int fill_cache
  68   (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *,  int, int, bfd_vma);
  69 static CGEN_INLINE long extract_1
  70   (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, int, 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 (CGEN_CPU_DESC cd,
  81           unsigned long value,
  82           int start,
  83           int length,
  84           int word_length,
  85           unsigned char *bufp)
  86 {
  87   unsigned long x,mask;
  88   int shift;
  89
  90   x = cgen_get_insn_value (cd, bufp, word_length);
  91
  92   /* Written this way to avoid undefined behaviour.  */
  93   mask = (((1L << (length - 1)) - 1) << 1) | 1;
  94   if (CGEN_INSN_LSB0_P)
  95     shift = (start + 1) - length;
  96   else
  97     shift = (word_length - (start + length));
  98   x = (x & ~(mask << shift)) | ((value & mask) << shift);
  99
 100   cgen_put_insn_value (cd, bufp, word_length, (bfd_vma) x);
 101 }
 102
 103 #endif /* ! CGEN_INT_INSN_P */
 104
 105 /* Default insertion routine.
 106
 107    ATTRS is a mask of the boolean attributes.
 108    WORD_OFFSET is the offset in bits from the start of the insn of the value.
 109    WORD_LENGTH is the length of the word in bits in which the value resides.
 110    START is the starting bit number in the word, architecture origin.
 111    LENGTH is the length of VALUE in bits.
 112    TOTAL_LENGTH is the total length of the insn in bits.
 113
 114    The result is an error message or NULL if success.  */
 115
 116 /* ??? This duplicates functionality with bfd's howto table and
 117    bfd_install_relocation.  */
 118 /* ??? This doesn't handle bfd_vma's.  Create another function when
 119    necessary.  */
 120
 121 static const char *
 122 insert_normal (CGEN_CPU_DESC cd,
 123                long value,
 124                unsigned int attrs,
 125                unsigned int word_offset,
 126                unsigned int start,
 127                unsigned int length,
 128                unsigned int word_length,
 129                unsigned int total_length,
 130                CGEN_INSN_BYTES_PTR buffer)
 131 {
 132   static char errbuf[100];
 133   /* Written this way to avoid undefined behaviour.  */
 134   unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1;
 135
 136   /* If LENGTH is zero, this operand doesn't contribute to the value.  */
 137   if (length == 0)
 138     return NULL;
 139
 140   if (word_length > 32)
 141     abort ();
 142
 143   /* For architectures with insns smaller than the base-insn-bitsize,
 144      word_length may be too big.  */
 145   if (cd->min_insn_bitsize < cd->base_insn_bitsize)
 146     {
 147       if (word_offset == 0
 148           && word_length > total_length)
 149         word_length = total_length;
 150     }
 151
 152   /* Ensure VALUE will fit.  */
 153   if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGN_OPT))
 154     {
 155       long minval = - (1L << (length - 1));
 156       unsigned long maxval = mask;
 157
 158       if ((value > 0 && (unsigned long) value > maxval)
 159           || value < minval)
 160         {
 161           /* xgettext:c-format */
 162           sprintf (errbuf,
 163                    _("operand out of range (%ld not between %ld and %lu)"),
 164                    value, minval, maxval);
 165           return errbuf;
 166         }
 167     }
 168   else if (! CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED))
 169     {
 170       unsigned long maxval = mask;
 171       unsigned long val = (unsigned long) value;
 172
 173       /* For hosts with a word size > 32 check to see if value has been sign
 174          extended beyond 32 bits.  If so then ignore these higher sign bits
 175          as the user is attempting to store a 32-bit signed value into an
 176          unsigned 32-bit field which is allowed.  */
 177       if (sizeof (unsigned long) > 4 && ((value >> 32) == -1))
 178         val &= 0xFFFFFFFF;
 179
 180       if (val > maxval)
 181         {
 182           /* xgettext:c-format */
 183           sprintf (errbuf,
 184                    _("operand out of range (0x%lx not between 0 and 0x%lx)"),
 185                    val, maxval);
 186           return errbuf;
 187         }
 188     }
 189   else
 190     {
 191       if (! cgen_signed_overflow_ok_p (cd))
 192         {
 193           long minval = - (1L << (length - 1));
 194           long maxval =   (1L << (length - 1)) - 1;
 195
 196           if (value < minval || value > maxval)
 197             {
 198               sprintf
 199                 /* xgettext:c-format */
 200                 (errbuf, _("operand out of range (%ld not between %ld and %ld)"),
 201                  value, minval, maxval);
 202               return errbuf;
 203             }
 204         }
 205     }
 206
 207 #if CGEN_INT_INSN_P
 208
 209   {
 210     int shift;
 211
 212     if (CGEN_INSN_LSB0_P)
 213       shift = (word_offset + start + 1) - length;
 214     else
 215       shift = total_length - (word_offset + start + length);
 216     *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift);
 217   }
 218
 219 #else /* ! CGEN_INT_INSN_P */
 220
 221   {
 222     unsigned char *bufp = (unsigned char *) buffer + word_offset / 8;
 223
 224     insert_1 (cd, value, start, length, word_length, bufp);
 225   }
 226
 227 #endif /* ! CGEN_INT_INSN_P */
 228
 229   return NULL;
 230 }
 231
 232 /* Default insn builder (insert handler).
 233    The instruction is recorded in CGEN_INT_INSN_P byte order (meaning
 234    that if CGEN_INSN_BYTES_PTR is an int * and thus, the value is
 235    recorded in host byte order, otherwise BUFFER is an array of bytes
 236    and the value is recorded in target byte order).
 237    The result is an error message or NULL if success.  */
 238
 239 static const char *
 240 insert_insn_normal (CGEN_CPU_DESC cd,
 241                     const CGEN_INSN * insn,
 242                     CGEN_FIELDS * fields,
 243                     CGEN_INSN_BYTES_PTR buffer,
 244                     bfd_vma pc)
 245 {
 246   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 247   unsigned long value;
 248   const CGEN_SYNTAX_CHAR_TYPE * syn;
 249
 250   CGEN_INIT_INSERT (cd);
 251   value = CGEN_INSN_BASE_VALUE (insn);
 252
 253   /* If we're recording insns as numbers (rather than a string of bytes),
 254      target byte order handling is deferred until later.  */
 255
 256 #if CGEN_INT_INSN_P
 257
 258   put_insn_int_value (cd, buffer, cd->base_insn_bitsize,
 259                       CGEN_FIELDS_BITSIZE (fields), value);
 260
 261 #else
 262
 263   cgen_put_insn_value (cd, buffer, min ((unsigned) cd->base_insn_bitsize,
 264                                         (unsigned) CGEN_FIELDS_BITSIZE (fields)),
 265                        value);
 266
 267 #endif /* ! CGEN_INT_INSN_P */
 268
 269   /* ??? It would be better to scan the format's fields.
 270      Still need to be able to insert a value based on the operand though;
 271      e.g. storing a branch displacement that got resolved later.
 272      Needs more thought first.  */
 273
 274   for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn)
 275     {
 276       const char *errmsg;
 277
 278       if (CGEN_SYNTAX_CHAR_P (* syn))
 279         continue;
 280
 281       errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
 282                                        fields, buffer, pc);
 283       if (errmsg)
 284         return errmsg;
 285     }
 286
 287   return NULL;
 288 }
 289
 290 #if CGEN_INT_INSN_P
 291 /* Cover function to store an insn value into an integral insn.  Must go here
 292    because it needs <prefix>-desc.h for CGEN_INT_INSN_P.  */
 293
 294 static void
 295 put_insn_int_value (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 296                     CGEN_INSN_BYTES_PTR buf,
 297                     int length,
 298                     int insn_length,
 299                     CGEN_INSN_INT value)
 300 {
 301   /* For architectures with insns smaller than the base-insn-bitsize,
 302      length may be too big.  */
 303   if (length > insn_length)
 304     *buf = value;
 305   else
 306     {
 307       int shift = insn_length - length;
 308       /* Written this way to avoid undefined behaviour.  */
 309       CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1;
 310
 311       *buf = (*buf & ~(mask << shift)) | ((value & mask) << shift);
 312     }
 313 }
 314 #endif
 315 \f
 316 /* Operand extraction.  */
 317
 318 #if ! CGEN_INT_INSN_P
 319
 320 /* Subroutine of extract_normal.
 321    Ensure sufficient bytes are cached in EX_INFO.
 322    OFFSET is the offset in bytes from the start of the insn of the value.
 323    BYTES is the length of the needed value.
 324    Returns 1 for success, 0 for failure.  */
 325
 326 static CGEN_INLINE int
 327 fill_cache (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 328             CGEN_EXTRACT_INFO *ex_info,
 329             int offset,
 330             int bytes,
 331             bfd_vma pc)
 332 {
 333   /* It's doubtful that the middle part has already been fetched so
 334      we don't optimize that case.  kiss.  */
 335   unsigned int mask;
 336   disassemble_info *info = (disassemble_info *) ex_info->dis_info;
 337
 338   /* First do a quick check.  */
 339   mask = (1 << bytes) - 1;
 340   if (((ex_info->valid >> offset) & mask) == mask)
 341     return 1;
 342
 343   /* Search for the first byte we need to read.  */
 344   for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1)
 345     if (! (mask & ex_info->valid))
 346       break;
 347
 348   if (bytes)
 349     {
 350       int status;
 351
 352       pc += offset;
 353       status = (*info->read_memory_func)
 354         (pc, ex_info->insn_bytes + offset, bytes, info);
 355
 356       if (status != 0)
 357         {
 358           (*info->memory_error_func) (status, pc, info);
 359           return 0;
 360         }
 361
 362       ex_info->valid |= ((1 << bytes) - 1) << offset;
 363     }
 364
 365   return 1;
 366 }
 367
 368 /* Subroutine of extract_normal.  */
 369
 370 static CGEN_INLINE long
 371 extract_1 (CGEN_CPU_DESC cd,
 372            CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
 373            int start,
 374            int length,
 375            int word_length,
 376            unsigned char *bufp,
 377            bfd_vma pc ATTRIBUTE_UNUSED)
 378 {
 379   unsigned long x;
 380   int shift;
 381
 382   x = cgen_get_insn_value (cd, bufp, word_length);
 383
 384   if (CGEN_INSN_LSB0_P)
 385     shift = (start + 1) - length;
 386   else
 387     shift = (word_length - (start + length));
 388   return x >> shift;
 389 }
 390
 391 #endif /* ! CGEN_INT_INSN_P */
 392
 393 /* Default extraction routine.
 394
 395    INSN_VALUE is the first base_insn_bitsize bits of the insn in host order,
 396    or sometimes less for cases like the m32r where the base insn size is 32
 397    but some insns are 16 bits.
 398    ATTRS is a mask of the boolean attributes.  We only need `SIGNED',
 399    but for generality we take a bitmask of all of them.
 400    WORD_OFFSET is the offset in bits from the start of the insn of the value.
 401    WORD_LENGTH is the length of the word in bits in which the value resides.
 402    START is the starting bit number in the word, architecture origin.
 403    LENGTH is the length of VALUE in bits.
 404    TOTAL_LENGTH is the total length of the insn in bits.
 405
 406    Returns 1 for success, 0 for failure.  */
 407
 408 /* ??? The return code isn't properly used.  wip.  */
 409
 410 /* ??? This doesn't handle bfd_vma's.  Create another function when
 411    necessary.  */
 412
 413 static int
 414 extract_normal (CGEN_CPU_DESC cd,
 415 #if ! CGEN_INT_INSN_P
 416                 CGEN_EXTRACT_INFO *ex_info,
 417 #else
 418                 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
 419 #endif
 420                 CGEN_INSN_INT insn_value,
 421                 unsigned int attrs,
 422                 unsigned int word_offset,
 423                 unsigned int start,
 424                 unsigned int length,
 425                 unsigned int word_length,
 426                 unsigned int total_length,
 427 #if ! CGEN_INT_INSN_P
 428                 bfd_vma pc,
 429 #else
 430                 bfd_vma pc ATTRIBUTE_UNUSED,
 431 #endif
 432                 long *valuep)
 433 {
 434   long value, mask;
 435
 436   /* If LENGTH is zero, this operand doesn't contribute to the value
 437      so give it a standard value of zero.  */
 438   if (length == 0)
 439     {
 440       *valuep = 0;
 441       return 1;
 442     }
 443
 444   if (word_length > 32)
 445     abort ();
 446
 447   /* For architectures with insns smaller than the insn-base-bitsize,
 448      word_length may be too big.  */
 449   if (cd->min_insn_bitsize < cd->base_insn_bitsize)
 450     {
 451       if (word_offset + word_length > total_length)
 452         word_length = total_length - word_offset;
 453     }
 454
 455   /* Does the value reside in INSN_VALUE, and at the right alignment?  */
 456
 457   if (CGEN_INT_INSN_P || (word_offset == 0 && word_length == total_length))
 458     {
 459       if (CGEN_INSN_LSB0_P)
 460         value = insn_value >> ((word_offset + start + 1) - length);
 461       else
 462         value = insn_value >> (total_length - ( word_offset + start + length));
 463     }
 464
 465 #if ! CGEN_INT_INSN_P
 466
 467   else
 468     {
 469       unsigned char *bufp = ex_info->insn_bytes + word_offset / 8;
 470
 471       if (word_length > 32)
 472         abort ();
 473
 474       if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0)
 475         return 0;
 476
 477       value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc);
 478     }
 479
 480 #endif /* ! CGEN_INT_INSN_P */
 481
 482   /* Written this way to avoid undefined behaviour.  */
 483   mask = (((1L << (length - 1)) - 1) << 1) | 1;
 484
 485   value &= mask;
 486   /* sign extend? */
 487   if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)
 488       && (value & (1L << (length - 1))))
 489     value |= ~mask;
 490
 491   *valuep = value;
 492
 493   return 1;
 494 }
 495
 496 /* Default insn extractor.
 497
 498    INSN_VALUE is the first base_insn_bitsize bits, translated to host order.
 499    The extracted fields are stored in FIELDS.
 500    EX_INFO is used to handle reading variable length insns.
 501    Return the length of the insn in bits, or 0 if no match,
 502    or -1 if an error occurs fetching data (memory_error_func will have
 503    been called).  */
 504
 505 static int
 506 extract_insn_normal (CGEN_CPU_DESC cd,
 507                      const CGEN_INSN *insn,
 508                      CGEN_EXTRACT_INFO *ex_info,
 509                      CGEN_INSN_INT insn_value,
 510                      CGEN_FIELDS *fields,
 511                      bfd_vma pc)
 512 {
 513   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 514   const CGEN_SYNTAX_CHAR_TYPE *syn;
 515
 516   CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
 517
 518   CGEN_INIT_EXTRACT (cd);
 519
 520   for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
 521     {
 522       int length;
 523
 524       if (CGEN_SYNTAX_CHAR_P (*syn))
 525         continue;
 526
 527       length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
 528                                         ex_info, insn_value, fields, pc);
 529       if (length <= 0)
 530         return length;
 531     }
 532
 533   /* We recognized and successfully extracted this insn.  */
 534   return CGEN_INSN_BITSIZE (insn);
 535 }
 536 \f
 537 /* Machine generated code added here.  */
 538
 539 const char * lm32_cgen_insert_operand
 540   (CGEN_CPU_DESC, int, CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma);
 541
 542 /* Main entry point for operand insertion.
 543
 544    This function is basically just a big switch statement.  Earlier versions
 545    used tables to look up the function to use, but
 546    - if the table contains both assembler and disassembler functions then
 547      the disassembler contains much of the assembler and vice-versa,
 548    - there's a lot of inlining possibilities as things grow,
 549    - using a switch statement avoids the function call overhead.
 550
 551    This function could be moved into `parse_insn_normal', but keeping it
 552    separate makes clear the interface between `parse_insn_normal' and each of
 553    the handlers.  It's also needed by GAS to insert operands that couldn't be
 554    resolved during parsing.  */
 555
 556 const char *
 557 lm32_cgen_insert_operand (CGEN_CPU_DESC cd,
 558                              int opindex,
 559                              CGEN_FIELDS * fields,
 560                              CGEN_INSN_BYTES_PTR buffer,
 561                              bfd_vma pc ATTRIBUTE_UNUSED)
 562 {
 563   const char * errmsg = NULL;
 564   unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
 565
 566   switch (opindex)
 567     {
 568     case LM32_OPERAND_BRANCH :
 569       {
 570         long value = fields->f_branch;
 571         value = ((int) (((value) - (pc))) >> (2));
 572         errmsg = insert_normal (cd, value, 0|(1<<CGEN_IFLD_SIGNED)|(1<<CGEN_IFLD_PCREL_ADDR), 0, 15, 16, 32, total_length, buffer);
 573       }
 574       break;
 575     case LM32_OPERAND_CALL :
 576       {
 577         long value = fields->f_call;
 578         value = ((int) (((value) - (pc))) >> (2));
 579         errmsg = insert_normal (cd, value, 0|(1<<CGEN_IFLD_SIGNED)|(1<<CGEN_IFLD_PCREL_ADDR), 0, 25, 26, 32, total_length, buffer);
 580       }
 581       break;
 582     case LM32_OPERAND_CSR :
 583       errmsg = insert_normal (cd, fields->f_csr, 0, 0, 25, 5, 32, total_length, buffer);
 584       break;
 585     case LM32_OPERAND_EXCEPTION :
 586       errmsg = insert_normal (cd, fields->f_exception, 0, 0, 25, 26, 32, total_length, buffer);
 587       break;
 588     case LM32_OPERAND_GOT16 :
 589       errmsg = insert_normal (cd, fields->f_imm, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, buffer);
 590       break;
 591     case LM32_OPERAND_GOTOFFHI16 :
 592       errmsg = insert_normal (cd, fields->f_imm, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, buffer);
 593       break;
 594     case LM32_OPERAND_GOTOFFLO16 :
 595       errmsg = insert_normal (cd, fields->f_imm, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, buffer);
 596       break;
 597     case LM32_OPERAND_GP16 :
 598       errmsg = insert_normal (cd, fields->f_imm, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, buffer);
 599       break;
 600     case LM32_OPERAND_HI16 :
 601       errmsg = insert_normal (cd, fields->f_uimm, 0, 0, 15, 16, 32, total_length, buffer);
 602       break;
 603     case LM32_OPERAND_IMM :
 604       errmsg = insert_normal (cd, fields->f_imm, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, buffer);
 605       break;
 606     case LM32_OPERAND_LO16 :
 607       errmsg = insert_normal (cd, fields->f_uimm, 0, 0, 15, 16, 32, total_length, buffer);
 608       break;
 609     case LM32_OPERAND_R0 :
 610       errmsg = insert_normal (cd, fields->f_r0, 0, 0, 25, 5, 32, total_length, buffer);
 611       break;
 612     case LM32_OPERAND_R1 :
 613       errmsg = insert_normal (cd, fields->f_r1, 0, 0, 20, 5, 32, total_length, buffer);
 614       break;
 615     case LM32_OPERAND_R2 :
 616       errmsg = insert_normal (cd, fields->f_r2, 0, 0, 15, 5, 32, total_length, buffer);
 617       break;
 618     case LM32_OPERAND_SHIFT :
 619       errmsg = insert_normal (cd, fields->f_shift, 0, 0, 4, 5, 32, total_length, buffer);
 620       break;
 621     case LM32_OPERAND_UIMM :
 622       errmsg = insert_normal (cd, fields->f_uimm, 0, 0, 15, 16, 32, total_length, buffer);
 623       break;
 624     case LM32_OPERAND_USER :
 625       errmsg = insert_normal (cd, fields->f_user, 0, 0, 10, 11, 32, total_length, buffer);
 626       break;
 627
 628     default :
 629       /* xgettext:c-format */
 630       fprintf (stderr, _("Unrecognized field %d while building insn.\n"),
 631                opindex);
 632       abort ();
 633   }
 634
 635   return errmsg;
 636 }
 637
 638 int lm32_cgen_extract_operand
 639   (CGEN_CPU_DESC, int, CGEN_EXTRACT_INFO *, CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
 640
 641 /* Main entry point for operand extraction.
 642    The result is <= 0 for error, >0 for success.
 643    ??? Actual values aren't well defined right now.
 644
 645    This function is basically just a big switch statement.  Earlier versions
 646    used tables to look up the function to use, but
 647    - if the table contains both assembler and disassembler functions then
 648      the disassembler contains much of the assembler and vice-versa,
 649    - there's a lot of inlining possibilities as things grow,
 650    - using a switch statement avoids the function call overhead.
 651
 652    This function could be moved into `print_insn_normal', but keeping it
 653    separate makes clear the interface between `print_insn_normal' and each of
 654    the handlers.  */
 655
 656 int
 657 lm32_cgen_extract_operand (CGEN_CPU_DESC cd,
 658                              int opindex,
 659                              CGEN_EXTRACT_INFO *ex_info,
 660                              CGEN_INSN_INT insn_value,
 661                              CGEN_FIELDS * fields,
 662                              bfd_vma pc)
 663 {
 664   /* Assume success (for those operands that are nops).  */
 665   int length = 1;
 666   unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
 667
 668   switch (opindex)
 669     {
 670     case LM32_OPERAND_BRANCH :
 671       {
 672         long value;
 673         length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED)|(1<<CGEN_IFLD_PCREL_ADDR), 0, 15, 16, 32, total_length, pc, & value);
 674         value = ((pc) + (((int) (((value) << (16))) >> (14))));
 675         fields->f_branch = value;
 676       }
 677       break;
 678     case LM32_OPERAND_CALL :
 679       {
 680         long value;
 681         length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED)|(1<<CGEN_IFLD_PCREL_ADDR), 0, 25, 26, 32, total_length, pc, & value);
 682         value = ((pc) + (((int) (((value) << (6))) >> (4))));
 683         fields->f_call = value;
 684       }
 685       break;
 686     case LM32_OPERAND_CSR :
 687       length = extract_normal (cd, ex_info, insn_value, 0, 0, 25, 5, 32, total_length, pc, & fields->f_csr);
 688       break;
 689     case LM32_OPERAND_EXCEPTION :
 690       length = extract_normal (cd, ex_info, insn_value, 0, 0, 25, 26, 32, total_length, pc, & fields->f_exception);
 691       break;
 692     case LM32_OPERAND_GOT16 :
 693       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, pc, & fields->f_imm);
 694       break;
 695     case LM32_OPERAND_GOTOFFHI16 :
 696       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, pc, & fields->f_imm);
 697       break;
 698     case LM32_OPERAND_GOTOFFLO16 :
 699       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, pc, & fields->f_imm);
 700       break;
 701     case LM32_OPERAND_GP16 :
 702       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, pc, & fields->f_imm);
 703       break;
 704     case LM32_OPERAND_HI16 :
 705       length = extract_normal (cd, ex_info, insn_value, 0, 0, 15, 16, 32, total_length, pc, & fields->f_uimm);
 706       break;
 707     case LM32_OPERAND_IMM :
 708       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, pc, & fields->f_imm);
 709       break;
 710     case LM32_OPERAND_LO16 :
 711       length = extract_normal (cd, ex_info, insn_value, 0, 0, 15, 16, 32, total_length, pc, & fields->f_uimm);
 712       break;
 713     case LM32_OPERAND_R0 :
 714       length = extract_normal (cd, ex_info, insn_value, 0, 0, 25, 5, 32, total_length, pc, & fields->f_r0);
 715       break;
 716     case LM32_OPERAND_R1 :
 717       length = extract_normal (cd, ex_info, insn_value, 0, 0, 20, 5, 32, total_length, pc, & fields->f_r1);
 718       break;
 719     case LM32_OPERAND_R2 :
 720       length = extract_normal (cd, ex_info, insn_value, 0, 0, 15, 5, 32, total_length, pc, & fields->f_r2);
 721       break;
 722     case LM32_OPERAND_SHIFT :
 723       length = extract_normal (cd, ex_info, insn_value, 0, 0, 4, 5, 32, total_length, pc, & fields->f_shift);
 724       break;
 725     case LM32_OPERAND_UIMM :
 726       length = extract_normal (cd, ex_info, insn_value, 0, 0, 15, 16, 32, total_length, pc, & fields->f_uimm);
 727       break;
 728     case LM32_OPERAND_USER :
 729       length = extract_normal (cd, ex_info, insn_value, 0, 0, 10, 11, 32, total_length, pc, & fields->f_user);
 730       break;
 731
 732     default :
 733       /* xgettext:c-format */
 734       fprintf (stderr, _("Unrecognized field %d while decoding insn.\n"),
 735                opindex);
 736       abort ();
 737     }
 738
 739   return length;
 740 }
 741
 742 cgen_insert_fn * const lm32_cgen_insert_handlers[] =
 743 {
 744   insert_insn_normal,
 745 };
 746
 747 cgen_extract_fn * const lm32_cgen_extract_handlers[] =
 748 {
 749   extract_insn_normal,
 750 };
 751
 752 int lm32_cgen_get_int_operand     (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
 753 bfd_vma lm32_cgen_get_vma_operand (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
 754
 755 /* Getting values from cgen_fields is handled by a collection of functions.
 756    They are distinguished by the type of the VALUE argument they return.
 757    TODO: floating point, inlining support, remove cases where result type
 758    not appropriate.  */
 759
 760 int
 761 lm32_cgen_get_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 762                              int opindex,
 763                              const CGEN_FIELDS * fields)
 764 {
 765   int value;
 766
 767   switch (opindex)
 768     {
 769     case LM32_OPERAND_BRANCH :
 770       value = fields->f_branch;
 771       break;
 772     case LM32_OPERAND_CALL :
 773       value = fields->f_call;
 774       break;
 775     case LM32_OPERAND_CSR :
 776       value = fields->f_csr;
 777       break;
 778     case LM32_OPERAND_EXCEPTION :
 779       value = fields->f_exception;
 780       break;
 781     case LM32_OPERAND_GOT16 :
 782       value = fields->f_imm;
 783       break;
 784     case LM32_OPERAND_GOTOFFHI16 :
 785       value = fields->f_imm;
 786       break;
 787     case LM32_OPERAND_GOTOFFLO16 :
 788       value = fields->f_imm;
 789       break;
 790     case LM32_OPERAND_GP16 :
 791       value = fields->f_imm;
 792       break;
 793     case LM32_OPERAND_HI16 :
 794       value = fields->f_uimm;
 795       break;
 796     case LM32_OPERAND_IMM :
 797       value = fields->f_imm;
 798       break;
 799     case LM32_OPERAND_LO16 :
 800       value = fields->f_uimm;
 801       break;
 802     case LM32_OPERAND_R0 :
 803       value = fields->f_r0;
 804       break;
 805     case LM32_OPERAND_R1 :
 806       value = fields->f_r1;
 807       break;
 808     case LM32_OPERAND_R2 :
 809       value = fields->f_r2;
 810       break;
 811     case LM32_OPERAND_SHIFT :
 812       value = fields->f_shift;
 813       break;
 814     case LM32_OPERAND_UIMM :
 815       value = fields->f_uimm;
 816       break;
 817     case LM32_OPERAND_USER :
 818       value = fields->f_user;
 819       break;
 820
 821     default :
 822       /* xgettext:c-format */
 823       fprintf (stderr, _("Unrecognized field %d while getting int operand.\n"),
 824                        opindex);
 825       abort ();
 826   }
 827
 828   return value;
 829 }
 830
 831 bfd_vma
 832 lm32_cgen_get_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 833                              int opindex,
 834                              const CGEN_FIELDS * fields)
 835 {
 836   bfd_vma value;
 837
 838   switch (opindex)
 839     {
 840     case LM32_OPERAND_BRANCH :
 841       value = fields->f_branch;
 842       break;
 843     case LM32_OPERAND_CALL :
 844       value = fields->f_call;
 845       break;
 846     case LM32_OPERAND_CSR :
 847       value = fields->f_csr;
 848       break;
 849     case LM32_OPERAND_EXCEPTION :
 850       value = fields->f_exception;
 851       break;
 852     case LM32_OPERAND_GOT16 :
 853       value = fields->f_imm;
 854       break;
 855     case LM32_OPERAND_GOTOFFHI16 :
 856       value = fields->f_imm;
 857       break;
 858     case LM32_OPERAND_GOTOFFLO16 :
 859       value = fields->f_imm;
 860       break;
 861     case LM32_OPERAND_GP16 :
 862       value = fields->f_imm;
 863       break;
 864     case LM32_OPERAND_HI16 :
 865       value = fields->f_uimm;
 866       break;
 867     case LM32_OPERAND_IMM :
 868       value = fields->f_imm;
 869       break;
 870     case LM32_OPERAND_LO16 :
 871       value = fields->f_uimm;
 872       break;
 873     case LM32_OPERAND_R0 :
 874       value = fields->f_r0;
 875       break;
 876     case LM32_OPERAND_R1 :
 877       value = fields->f_r1;
 878       break;
 879     case LM32_OPERAND_R2 :
 880       value = fields->f_r2;
 881       break;
 882     case LM32_OPERAND_SHIFT :
 883       value = fields->f_shift;
 884       break;
 885     case LM32_OPERAND_UIMM :
 886       value = fields->f_uimm;
 887       break;
 888     case LM32_OPERAND_USER :
 889       value = fields->f_user;
 890       break;
 891
 892     default :
 893       /* xgettext:c-format */
 894       fprintf (stderr, _("Unrecognized field %d while getting vma operand.\n"),
 895                        opindex);
 896       abort ();
 897   }
 898
 899   return value;
 900 }
 901
 902 void lm32_cgen_set_int_operand  (CGEN_CPU_DESC, int, CGEN_FIELDS *, int);
 903 void lm32_cgen_set_vma_operand  (CGEN_CPU_DESC, int, CGEN_FIELDS *, bfd_vma);
 904
 905 /* Stuffing values in cgen_fields is handled by a collection of functions.
 906    They are distinguished by the type of the VALUE argument they accept.
 907    TODO: floating point, inlining support, remove cases where argument type
 908    not appropriate.  */
 909
 910 void
 911 lm32_cgen_set_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 912                              int opindex,
 913                              CGEN_FIELDS * fields,
 914                              int value)
 915 {
 916   switch (opindex)
 917     {
 918     case LM32_OPERAND_BRANCH :
 919       fields->f_branch = value;
 920       break;
 921     case LM32_OPERAND_CALL :
 922       fields->f_call = value;
 923       break;
 924     case LM32_OPERAND_CSR :
 925       fields->f_csr = value;
 926       break;
 927     case LM32_OPERAND_EXCEPTION :
 928       fields->f_exception = value;
 929       break;
 930     case LM32_OPERAND_GOT16 :
 931       fields->f_imm = value;
 932       break;
 933     case LM32_OPERAND_GOTOFFHI16 :
 934       fields->f_imm = value;
 935       break;
 936     case LM32_OPERAND_GOTOFFLO16 :
 937       fields->f_imm = value;
 938       break;
 939     case LM32_OPERAND_GP16 :
 940       fields->f_imm = value;
 941       break;
 942     case LM32_OPERAND_HI16 :
 943       fields->f_uimm = value;
 944       break;
 945     case LM32_OPERAND_IMM :
 946       fields->f_imm = value;
 947       break;
 948     case LM32_OPERAND_LO16 :
 949       fields->f_uimm = value;
 950       break;
 951     case LM32_OPERAND_R0 :
 952       fields->f_r0 = value;
 953       break;
 954     case LM32_OPERAND_R1 :
 955       fields->f_r1 = value;
 956       break;
 957     case LM32_OPERAND_R2 :
 958       fields->f_r2 = value;
 959       break;
 960     case LM32_OPERAND_SHIFT :
 961       fields->f_shift = value;
 962       break;
 963     case LM32_OPERAND_UIMM :
 964       fields->f_uimm = value;
 965       break;
 966     case LM32_OPERAND_USER :
 967       fields->f_user = value;
 968       break;
 969
 970     default :
 971       /* xgettext:c-format */
 972       fprintf (stderr, _("Unrecognized field %d while setting int operand.\n"),
 973                        opindex);
 974       abort ();
 975   }
 976 }
 977
 978 void
 979 lm32_cgen_set_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 980                              int opindex,
 981                              CGEN_FIELDS * fields,
 982                              bfd_vma value)
 983 {
 984   switch (opindex)
 985     {
 986     case LM32_OPERAND_BRANCH :
 987       fields->f_branch = value;
 988       break;
 989     case LM32_OPERAND_CALL :
 990       fields->f_call = value;
 991       break;
 992     case LM32_OPERAND_CSR :
 993       fields->f_csr = value;
 994       break;
 995     case LM32_OPERAND_EXCEPTION :
 996       fields->f_exception = value;
 997       break;
 998     case LM32_OPERAND_GOT16 :
 999       fields->f_imm = value;
1000       break;
1001     case LM32_OPERAND_GOTOFFHI16 :
1002       fields->f_imm = value;
1003       break;
1004     case LM32_OPERAND_GOTOFFLO16 :
1005       fields->f_imm = value;
1006       break;
1007     case LM32_OPERAND_GP16 :
1008       fields->f_imm = value;
1009       break;
1010     case LM32_OPERAND_HI16 :
1011       fields->f_uimm = value;
1012       break;
1013     case LM32_OPERAND_IMM :
1014       fields->f_imm = value;
1015       break;
1016     case LM32_OPERAND_LO16 :
1017       fields->f_uimm = value;
1018       break;
1019     case LM32_OPERAND_R0 :
1020       fields->f_r0 = value;
1021       break;
1022     case LM32_OPERAND_R1 :
1023       fields->f_r1 = value;
1024       break;
1025     case LM32_OPERAND_R2 :
1026       fields->f_r2 = value;
1027       break;
1028     case LM32_OPERAND_SHIFT :
1029       fields->f_shift = value;
1030       break;
1031     case LM32_OPERAND_UIMM :
1032       fields->f_uimm = value;
1033       break;
1034     case LM32_OPERAND_USER :
1035       fields->f_user = value;
1036       break;
1037
1038     default :
1039       /* xgettext:c-format */
1040       fprintf (stderr, _("Unrecognized field %d while setting vma operand.\n"),
1041                        opindex);
1042       abort ();
1043   }
1044 }
1045
1046 /* Function to call before using the instruction builder tables.  */
1047
1048 void
1049 lm32_cgen_init_ibld_table (CGEN_CPU_DESC cd)
1050 {
1051   cd->insert_handlers = & lm32_cgen_insert_handlers[0];
1052   cd->extract_handlers = & lm32_cgen_extract_handlers[0];
1053
1054   cd->insert_operand = lm32_cgen_insert_operand;
1055   cd->extract_operand = lm32_cgen_extract_operand;
1056
1057   cd->get_int_operand = lm32_cgen_get_int_operand;
1058   cd->set_int_operand = lm32_cgen_set_int_operand;
1059   cd->get_vma_operand = lm32_cgen_get_vma_operand;
1060   cd->set_vma_operand = lm32_cgen_set_vma_operand;
1061 }