opcodes/openrisc-ibld.c

   1 /* Instruction building/extraction support for openrisc. -*- 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 "openrisc-desc.h"
  35 #include "openrisc-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 * openrisc_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 openrisc_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 OPENRISC_OPERAND_ABS_26 :
 569       {
 570         long value = fields->f_abs26;
 571         value = ((int) (pc) >> (2));
 572         errmsg = insert_normal (cd, value, 0|(1<<CGEN_IFLD_SIGNED)|(1<<CGEN_IFLD_ABS_ADDR), 0, 25, 26, 32, total_length, buffer);
 573       }
 574       break;
 575     case OPENRISC_OPERAND_DISP_26 :
 576       {
 577         long value = fields->f_disp26;
 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 OPENRISC_OPERAND_HI16 :
 583       errmsg = insert_normal (cd, fields->f_simm16, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, buffer);
 584       break;
 585     case OPENRISC_OPERAND_LO16 :
 586       errmsg = insert_normal (cd, fields->f_lo16, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, buffer);
 587       break;
 588     case OPENRISC_OPERAND_OP_F_23 :
 589       errmsg = insert_normal (cd, fields->f_op4, 0, 0, 23, 3, 32, total_length, buffer);
 590       break;
 591     case OPENRISC_OPERAND_OP_F_3 :
 592       errmsg = insert_normal (cd, fields->f_op5, 0, 0, 25, 5, 32, total_length, buffer);
 593       break;
 594     case OPENRISC_OPERAND_RA :
 595       errmsg = insert_normal (cd, fields->f_r2, 0, 0, 20, 5, 32, total_length, buffer);
 596       break;
 597     case OPENRISC_OPERAND_RB :
 598       errmsg = insert_normal (cd, fields->f_r3, 0, 0, 15, 5, 32, total_length, buffer);
 599       break;
 600     case OPENRISC_OPERAND_RD :
 601       errmsg = insert_normal (cd, fields->f_r1, 0, 0, 25, 5, 32, total_length, buffer);
 602       break;
 603     case OPENRISC_OPERAND_SIMM_16 :
 604       errmsg = insert_normal (cd, fields->f_simm16, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, buffer);
 605       break;
 606     case OPENRISC_OPERAND_UI16NC :
 607       {
 608 {
 609   FLD (f_i16_2) = ((((int) (FLD (f_i16nc)) >> (11))) & (31));
 610   FLD (f_i16_1) = ((FLD (f_i16nc)) & (2047));
 611 }
 612         errmsg = insert_normal (cd, fields->f_i16_1, 0, 0, 10, 11, 32, total_length, buffer);
 613         if (errmsg)
 614           break;
 615         errmsg = insert_normal (cd, fields->f_i16_2, 0, 0, 25, 5, 32, total_length, buffer);
 616         if (errmsg)
 617           break;
 618       }
 619       break;
 620     case OPENRISC_OPERAND_UIMM_16 :
 621       errmsg = insert_normal (cd, fields->f_uimm16, 0, 0, 15, 16, 32, total_length, buffer);
 622       break;
 623     case OPENRISC_OPERAND_UIMM_5 :
 624       errmsg = insert_normal (cd, fields->f_uimm5, 0, 0, 4, 5, 32, total_length, buffer);
 625       break;
 626
 627     default :
 628       /* xgettext:c-format */
 629       fprintf (stderr, _("Unrecognized field %d while building insn.\n"),
 630                opindex);
 631       abort ();
 632   }
 633
 634   return errmsg;
 635 }
 636
 637 int openrisc_cgen_extract_operand
 638   (CGEN_CPU_DESC, int, CGEN_EXTRACT_INFO *, CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
 639
 640 /* Main entry point for operand extraction.
 641    The result is <= 0 for error, >0 for success.
 642    ??? Actual values aren't well defined right now.
 643
 644    This function is basically just a big switch statement.  Earlier versions
 645    used tables to look up the function to use, but
 646    - if the table contains both assembler and disassembler functions then
 647      the disassembler contains much of the assembler and vice-versa,
 648    - there's a lot of inlining possibilities as things grow,
 649    - using a switch statement avoids the function call overhead.
 650
 651    This function could be moved into `print_insn_normal', but keeping it
 652    separate makes clear the interface between `print_insn_normal' and each of
 653    the handlers.  */
 654
 655 int
 656 openrisc_cgen_extract_operand (CGEN_CPU_DESC cd,
 657                              int opindex,
 658                              CGEN_EXTRACT_INFO *ex_info,
 659                              CGEN_INSN_INT insn_value,
 660                              CGEN_FIELDS * fields,
 661                              bfd_vma pc)
 662 {
 663   /* Assume success (for those operands that are nops).  */
 664   int length = 1;
 665   unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
 666
 667   switch (opindex)
 668     {
 669     case OPENRISC_OPERAND_ABS_26 :
 670       {
 671         long value;
 672         length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED)|(1<<CGEN_IFLD_ABS_ADDR), 0, 25, 26, 32, total_length, pc, & value);
 673         value = ((value) << (2));
 674         fields->f_abs26 = value;
 675       }
 676       break;
 677     case OPENRISC_OPERAND_DISP_26 :
 678       {
 679         long value;
 680         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);
 681         value = ((((value) << (2))) + (pc));
 682         fields->f_disp26 = value;
 683       }
 684       break;
 685     case OPENRISC_OPERAND_HI16 :
 686       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, pc, & fields->f_simm16);
 687       break;
 688     case OPENRISC_OPERAND_LO16 :
 689       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, pc, & fields->f_lo16);
 690       break;
 691     case OPENRISC_OPERAND_OP_F_23 :
 692       length = extract_normal (cd, ex_info, insn_value, 0, 0, 23, 3, 32, total_length, pc, & fields->f_op4);
 693       break;
 694     case OPENRISC_OPERAND_OP_F_3 :
 695       length = extract_normal (cd, ex_info, insn_value, 0, 0, 25, 5, 32, total_length, pc, & fields->f_op5);
 696       break;
 697     case OPENRISC_OPERAND_RA :
 698       length = extract_normal (cd, ex_info, insn_value, 0, 0, 20, 5, 32, total_length, pc, & fields->f_r2);
 699       break;
 700     case OPENRISC_OPERAND_RB :
 701       length = extract_normal (cd, ex_info, insn_value, 0, 0, 15, 5, 32, total_length, pc, & fields->f_r3);
 702       break;
 703     case OPENRISC_OPERAND_RD :
 704       length = extract_normal (cd, ex_info, insn_value, 0, 0, 25, 5, 32, total_length, pc, & fields->f_r1);
 705       break;
 706     case OPENRISC_OPERAND_SIMM_16 :
 707       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, pc, & fields->f_simm16);
 708       break;
 709     case OPENRISC_OPERAND_UI16NC :
 710       {
 711         length = extract_normal (cd, ex_info, insn_value, 0, 0, 10, 11, 32, total_length, pc, & fields->f_i16_1);
 712         if (length <= 0) break;
 713         length = extract_normal (cd, ex_info, insn_value, 0, 0, 25, 5, 32, total_length, pc, & fields->f_i16_2);
 714         if (length <= 0) break;
 715 {
 716   FLD (f_i16nc) = openrisc_sign_extend_16bit (((((FLD (f_i16_2)) << (11))) | (FLD (f_i16_1))));
 717 }
 718       }
 719       break;
 720     case OPENRISC_OPERAND_UIMM_16 :
 721       length = extract_normal (cd, ex_info, insn_value, 0, 0, 15, 16, 32, total_length, pc, & fields->f_uimm16);
 722       break;
 723     case OPENRISC_OPERAND_UIMM_5 :
 724       length = extract_normal (cd, ex_info, insn_value, 0, 0, 4, 5, 32, total_length, pc, & fields->f_uimm5);
 725       break;
 726
 727     default :
 728       /* xgettext:c-format */
 729       fprintf (stderr, _("Unrecognized field %d while decoding insn.\n"),
 730                opindex);
 731       abort ();
 732     }
 733
 734   return length;
 735 }
 736
 737 cgen_insert_fn * const openrisc_cgen_insert_handlers[] =
 738 {
 739   insert_insn_normal,
 740 };
 741
 742 cgen_extract_fn * const openrisc_cgen_extract_handlers[] =
 743 {
 744   extract_insn_normal,
 745 };
 746
 747 int openrisc_cgen_get_int_operand     (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
 748 bfd_vma openrisc_cgen_get_vma_operand (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
 749
 750 /* Getting values from cgen_fields is handled by a collection of functions.
 751    They are distinguished by the type of the VALUE argument they return.
 752    TODO: floating point, inlining support, remove cases where result type
 753    not appropriate.  */
 754
 755 int
 756 openrisc_cgen_get_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 757                              int opindex,
 758                              const CGEN_FIELDS * fields)
 759 {
 760   int value;
 761
 762   switch (opindex)
 763     {
 764     case OPENRISC_OPERAND_ABS_26 :
 765       value = fields->f_abs26;
 766       break;
 767     case OPENRISC_OPERAND_DISP_26 :
 768       value = fields->f_disp26;
 769       break;
 770     case OPENRISC_OPERAND_HI16 :
 771       value = fields->f_simm16;
 772       break;
 773     case OPENRISC_OPERAND_LO16 :
 774       value = fields->f_lo16;
 775       break;
 776     case OPENRISC_OPERAND_OP_F_23 :
 777       value = fields->f_op4;
 778       break;
 779     case OPENRISC_OPERAND_OP_F_3 :
 780       value = fields->f_op5;
 781       break;
 782     case OPENRISC_OPERAND_RA :
 783       value = fields->f_r2;
 784       break;
 785     case OPENRISC_OPERAND_RB :
 786       value = fields->f_r3;
 787       break;
 788     case OPENRISC_OPERAND_RD :
 789       value = fields->f_r1;
 790       break;
 791     case OPENRISC_OPERAND_SIMM_16 :
 792       value = fields->f_simm16;
 793       break;
 794     case OPENRISC_OPERAND_UI16NC :
 795       value = fields->f_i16nc;
 796       break;
 797     case OPENRISC_OPERAND_UIMM_16 :
 798       value = fields->f_uimm16;
 799       break;
 800     case OPENRISC_OPERAND_UIMM_5 :
 801       value = fields->f_uimm5;
 802       break;
 803
 804     default :
 805       /* xgettext:c-format */
 806       fprintf (stderr, _("Unrecognized field %d while getting int operand.\n"),
 807                        opindex);
 808       abort ();
 809   }
 810
 811   return value;
 812 }
 813
 814 bfd_vma
 815 openrisc_cgen_get_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 816                              int opindex,
 817                              const CGEN_FIELDS * fields)
 818 {
 819   bfd_vma value;
 820
 821   switch (opindex)
 822     {
 823     case OPENRISC_OPERAND_ABS_26 :
 824       value = fields->f_abs26;
 825       break;
 826     case OPENRISC_OPERAND_DISP_26 :
 827       value = fields->f_disp26;
 828       break;
 829     case OPENRISC_OPERAND_HI16 :
 830       value = fields->f_simm16;
 831       break;
 832     case OPENRISC_OPERAND_LO16 :
 833       value = fields->f_lo16;
 834       break;
 835     case OPENRISC_OPERAND_OP_F_23 :
 836       value = fields->f_op4;
 837       break;
 838     case OPENRISC_OPERAND_OP_F_3 :
 839       value = fields->f_op5;
 840       break;
 841     case OPENRISC_OPERAND_RA :
 842       value = fields->f_r2;
 843       break;
 844     case OPENRISC_OPERAND_RB :
 845       value = fields->f_r3;
 846       break;
 847     case OPENRISC_OPERAND_RD :
 848       value = fields->f_r1;
 849       break;
 850     case OPENRISC_OPERAND_SIMM_16 :
 851       value = fields->f_simm16;
 852       break;
 853     case OPENRISC_OPERAND_UI16NC :
 854       value = fields->f_i16nc;
 855       break;
 856     case OPENRISC_OPERAND_UIMM_16 :
 857       value = fields->f_uimm16;
 858       break;
 859     case OPENRISC_OPERAND_UIMM_5 :
 860       value = fields->f_uimm5;
 861       break;
 862
 863     default :
 864       /* xgettext:c-format */
 865       fprintf (stderr, _("Unrecognized field %d while getting vma operand.\n"),
 866                        opindex);
 867       abort ();
 868   }
 869
 870   return value;
 871 }
 872
 873 void openrisc_cgen_set_int_operand  (CGEN_CPU_DESC, int, CGEN_FIELDS *, int);
 874 void openrisc_cgen_set_vma_operand  (CGEN_CPU_DESC, int, CGEN_FIELDS *, bfd_vma);
 875
 876 /* Stuffing values in cgen_fields is handled by a collection of functions.
 877    They are distinguished by the type of the VALUE argument they accept.
 878    TODO: floating point, inlining support, remove cases where argument type
 879    not appropriate.  */
 880
 881 void
 882 openrisc_cgen_set_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 883                              int opindex,
 884                              CGEN_FIELDS * fields,
 885                              int value)
 886 {
 887   switch (opindex)
 888     {
 889     case OPENRISC_OPERAND_ABS_26 :
 890       fields->f_abs26 = value;
 891       break;
 892     case OPENRISC_OPERAND_DISP_26 :
 893       fields->f_disp26 = value;
 894       break;
 895     case OPENRISC_OPERAND_HI16 :
 896       fields->f_simm16 = value;
 897       break;
 898     case OPENRISC_OPERAND_LO16 :
 899       fields->f_lo16 = value;
 900       break;
 901     case OPENRISC_OPERAND_OP_F_23 :
 902       fields->f_op4 = value;
 903       break;
 904     case OPENRISC_OPERAND_OP_F_3 :
 905       fields->f_op5 = value;
 906       break;
 907     case OPENRISC_OPERAND_RA :
 908       fields->f_r2 = value;
 909       break;
 910     case OPENRISC_OPERAND_RB :
 911       fields->f_r3 = value;
 912       break;
 913     case OPENRISC_OPERAND_RD :
 914       fields->f_r1 = value;
 915       break;
 916     case OPENRISC_OPERAND_SIMM_16 :
 917       fields->f_simm16 = value;
 918       break;
 919     case OPENRISC_OPERAND_UI16NC :
 920       fields->f_i16nc = value;
 921       break;
 922     case OPENRISC_OPERAND_UIMM_16 :
 923       fields->f_uimm16 = value;
 924       break;
 925     case OPENRISC_OPERAND_UIMM_5 :
 926       fields->f_uimm5 = value;
 927       break;
 928
 929     default :
 930       /* xgettext:c-format */
 931       fprintf (stderr, _("Unrecognized field %d while setting int operand.\n"),
 932                        opindex);
 933       abort ();
 934   }
 935 }
 936
 937 void
 938 openrisc_cgen_set_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 939                              int opindex,
 940                              CGEN_FIELDS * fields,
 941                              bfd_vma value)
 942 {
 943   switch (opindex)
 944     {
 945     case OPENRISC_OPERAND_ABS_26 :
 946       fields->f_abs26 = value;
 947       break;
 948     case OPENRISC_OPERAND_DISP_26 :
 949       fields->f_disp26 = value;
 950       break;
 951     case OPENRISC_OPERAND_HI16 :
 952       fields->f_simm16 = value;
 953       break;
 954     case OPENRISC_OPERAND_LO16 :
 955       fields->f_lo16 = value;
 956       break;
 957     case OPENRISC_OPERAND_OP_F_23 :
 958       fields->f_op4 = value;
 959       break;
 960     case OPENRISC_OPERAND_OP_F_3 :
 961       fields->f_op5 = value;
 962       break;
 963     case OPENRISC_OPERAND_RA :
 964       fields->f_r2 = value;
 965       break;
 966     case OPENRISC_OPERAND_RB :
 967       fields->f_r3 = value;
 968       break;
 969     case OPENRISC_OPERAND_RD :
 970       fields->f_r1 = value;
 971       break;
 972     case OPENRISC_OPERAND_SIMM_16 :
 973       fields->f_simm16 = value;
 974       break;
 975     case OPENRISC_OPERAND_UI16NC :
 976       fields->f_i16nc = value;
 977       break;
 978     case OPENRISC_OPERAND_UIMM_16 :
 979       fields->f_uimm16 = value;
 980       break;
 981     case OPENRISC_OPERAND_UIMM_5 :
 982       fields->f_uimm5 = value;
 983       break;
 984
 985     default :
 986       /* xgettext:c-format */
 987       fprintf (stderr, _("Unrecognized field %d while setting vma operand.\n"),
 988                        opindex);
 989       abort ();
 990   }
 991 }
 992
 993 /* Function to call before using the instruction builder tables.  */
 994
 995 void
 996 openrisc_cgen_init_ibld_table (CGEN_CPU_DESC cd)
 997 {
 998   cd->insert_handlers = & openrisc_cgen_insert_handlers[0];
 999   cd->extract_handlers = & openrisc_cgen_extract_handlers[0];
1000
1001   cd->insert_operand = openrisc_cgen_insert_operand;
1002   cd->extract_operand = openrisc_cgen_extract_operand;
1003
1004   cd->get_int_operand = openrisc_cgen_get_int_operand;
1005   cd->set_int_operand = openrisc_cgen_set_int_operand;
1006   cd->get_vma_operand = openrisc_cgen_get_vma_operand;
1007   cd->set_vma_operand = openrisc_cgen_set_vma_operand;
1008 }