opcodes/bpf-ibld.c

   1 /* DO NOT EDIT!  -*- buffer-read-only: t -*- vi:set ro:  */
   2 /* Instruction building/extraction support for bpf. -*- 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) 1996-2021 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 "bpf-desc.h"
  35 #include "bpf-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 * bpf_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 bpf_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 BPF_OPERAND_DISP16 :
 582       errmsg = insert_normal (cd, fields->f_offset16, 0|(1<<CGEN_IFLD_SIGNED), 16, 15, 16, 16, total_length, buffer);
 583       break;
 584     case BPF_OPERAND_DISP32 :
 585       errmsg = insert_normal (cd, fields->f_imm32, 0|(1<<CGEN_IFLD_SIGNED), 32, 31, 32, 32, total_length, buffer);
 586       break;
 587     case BPF_OPERAND_DSTBE :
 588       errmsg = insert_normal (cd, fields->f_dstbe, 0, 8, 7, 4, 8, total_length, buffer);
 589       break;
 590     case BPF_OPERAND_DSTLE :
 591       errmsg = insert_normal (cd, fields->f_dstle, 0, 8, 3, 4, 8, total_length, buffer);
 592       break;
 593     case BPF_OPERAND_ENDSIZE :
 594       errmsg = insert_normal (cd, fields->f_imm32, 0|(1<<CGEN_IFLD_SIGNED), 32, 31, 32, 32, total_length, buffer);
 595       break;
 596     case BPF_OPERAND_IMM32 :
 597       errmsg = insert_normal (cd, fields->f_imm32, 0|(1<<CGEN_IFLD_SIGNED), 32, 31, 32, 32, total_length, buffer);
 598       break;
 599     case BPF_OPERAND_IMM64 :
 600       {
 601 {
 602   FLD (f_imm64_b) = 0;
 603   FLD (f_imm64_c) = ((UDI) (FLD (f_imm64)) >> (32));
 604   FLD (f_imm64_a) = ((FLD (f_imm64)) & (MAKEDI (0, 0xffffffff)));
 605 }
 606         errmsg = insert_normal (cd, fields->f_imm64_a, 0, 32, 31, 32, 32, total_length, buffer);
 607         if (errmsg)
 608           break;
 609         errmsg = insert_normal (cd, fields->f_imm64_b, 0, 64, 31, 32, 32, total_length, buffer);
 610         if (errmsg)
 611           break;
 612         errmsg = insert_normal (cd, fields->f_imm64_c, 0, 96, 31, 32, 32, total_length, buffer);
 613         if (errmsg)
 614           break;
 615       }
 616       break;
 617     case BPF_OPERAND_OFFSET16 :
 618       errmsg = insert_normal (cd, fields->f_offset16, 0|(1<<CGEN_IFLD_SIGNED), 16, 15, 16, 16, total_length, buffer);
 619       break;
 620     case BPF_OPERAND_SRCBE :
 621       errmsg = insert_normal (cd, fields->f_srcbe, 0, 8, 3, 4, 8, total_length, buffer);
 622       break;
 623     case BPF_OPERAND_SRCLE :
 624       errmsg = insert_normal (cd, fields->f_srcle, 0, 8, 7, 4, 8, total_length, buffer);
 625       break;
 626
 627     default :
 628       /* xgettext:c-format */
 629       opcodes_error_handler
 630         (_("internal error: unrecognized field %d while building insn"),
 631          opindex);
 632       abort ();
 633   }
 634
 635   return errmsg;
 636 }
 637
 638 int bpf_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 bpf_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 BPF_OPERAND_DISP16 :
 671       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 16, 15, 16, 16, total_length, pc, & fields->f_offset16);
 672       break;
 673     case BPF_OPERAND_DISP32 :
 674       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 32, 31, 32, 32, total_length, pc, & fields->f_imm32);
 675       break;
 676     case BPF_OPERAND_DSTBE :
 677       length = extract_normal (cd, ex_info, insn_value, 0, 8, 7, 4, 8, total_length, pc, & fields->f_dstbe);
 678       break;
 679     case BPF_OPERAND_DSTLE :
 680       length = extract_normal (cd, ex_info, insn_value, 0, 8, 3, 4, 8, total_length, pc, & fields->f_dstle);
 681       break;
 682     case BPF_OPERAND_ENDSIZE :
 683       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 32, 31, 32, 32, total_length, pc, & fields->f_imm32);
 684       break;
 685     case BPF_OPERAND_IMM32 :
 686       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 32, 31, 32, 32, total_length, pc, & fields->f_imm32);
 687       break;
 688     case BPF_OPERAND_IMM64 :
 689       {
 690         length = extract_normal (cd, ex_info, insn_value, 0, 32, 31, 32, 32, total_length, pc, & fields->f_imm64_a);
 691         if (length <= 0) break;
 692         length = extract_normal (cd, ex_info, insn_value, 0, 64, 31, 32, 32, total_length, pc, & fields->f_imm64_b);
 693         if (length <= 0) break;
 694         length = extract_normal (cd, ex_info, insn_value, 0, 96, 31, 32, 32, total_length, pc, & fields->f_imm64_c);
 695         if (length <= 0) break;
 696 {
 697   FLD (f_imm64) = ((((((UDI) (UINT) (FLD (f_imm64_c)))) << (32))) | (((UDI) (UINT) (FLD (f_imm64_a)))));
 698 }
 699       }
 700       break;
 701     case BPF_OPERAND_OFFSET16 :
 702       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 16, 15, 16, 16, total_length, pc, & fields->f_offset16);
 703       break;
 704     case BPF_OPERAND_SRCBE :
 705       length = extract_normal (cd, ex_info, insn_value, 0, 8, 3, 4, 8, total_length, pc, & fields->f_srcbe);
 706       break;
 707     case BPF_OPERAND_SRCLE :
 708       length = extract_normal (cd, ex_info, insn_value, 0, 8, 7, 4, 8, total_length, pc, & fields->f_srcle);
 709       break;
 710
 711     default :
 712       /* xgettext:c-format */
 713       opcodes_error_handler
 714         (_("internal error: unrecognized field %d while decoding insn"),
 715          opindex);
 716       abort ();
 717     }
 718
 719   return length;
 720 }
 721
 722 cgen_insert_fn * const bpf_cgen_insert_handlers[] =
 723 {
 724   insert_insn_normal,
 725 };
 726
 727 cgen_extract_fn * const bpf_cgen_extract_handlers[] =
 728 {
 729   extract_insn_normal,
 730 };
 731
 732 int bpf_cgen_get_int_operand     (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
 733 bfd_vma bpf_cgen_get_vma_operand (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
 734
 735 /* Getting values from cgen_fields is handled by a collection of functions.
 736    They are distinguished by the type of the VALUE argument they return.
 737    TODO: floating point, inlining support, remove cases where result type
 738    not appropriate.  */
 739
 740 int
 741 bpf_cgen_get_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 742                              int opindex,
 743                              const CGEN_FIELDS * fields)
 744 {
 745   int value;
 746
 747   switch (opindex)
 748     {
 749     case BPF_OPERAND_DISP16 :
 750       value = fields->f_offset16;
 751       break;
 752     case BPF_OPERAND_DISP32 :
 753       value = fields->f_imm32;
 754       break;
 755     case BPF_OPERAND_DSTBE :
 756       value = fields->f_dstbe;
 757       break;
 758     case BPF_OPERAND_DSTLE :
 759       value = fields->f_dstle;
 760       break;
 761     case BPF_OPERAND_ENDSIZE :
 762       value = fields->f_imm32;
 763       break;
 764     case BPF_OPERAND_IMM32 :
 765       value = fields->f_imm32;
 766       break;
 767     case BPF_OPERAND_IMM64 :
 768       value = fields->f_imm64;
 769       break;
 770     case BPF_OPERAND_OFFSET16 :
 771       value = fields->f_offset16;
 772       break;
 773     case BPF_OPERAND_SRCBE :
 774       value = fields->f_srcbe;
 775       break;
 776     case BPF_OPERAND_SRCLE :
 777       value = fields->f_srcle;
 778       break;
 779
 780     default :
 781       /* xgettext:c-format */
 782       opcodes_error_handler
 783         (_("internal error: unrecognized field %d while getting int operand"),
 784          opindex);
 785       abort ();
 786   }
 787
 788   return value;
 789 }
 790
 791 bfd_vma
 792 bpf_cgen_get_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 793                              int opindex,
 794                              const CGEN_FIELDS * fields)
 795 {
 796   bfd_vma value;
 797
 798   switch (opindex)
 799     {
 800     case BPF_OPERAND_DISP16 :
 801       value = fields->f_offset16;
 802       break;
 803     case BPF_OPERAND_DISP32 :
 804       value = fields->f_imm32;
 805       break;
 806     case BPF_OPERAND_DSTBE :
 807       value = fields->f_dstbe;
 808       break;
 809     case BPF_OPERAND_DSTLE :
 810       value = fields->f_dstle;
 811       break;
 812     case BPF_OPERAND_ENDSIZE :
 813       value = fields->f_imm32;
 814       break;
 815     case BPF_OPERAND_IMM32 :
 816       value = fields->f_imm32;
 817       break;
 818     case BPF_OPERAND_IMM64 :
 819       value = fields->f_imm64;
 820       break;
 821     case BPF_OPERAND_OFFSET16 :
 822       value = fields->f_offset16;
 823       break;
 824     case BPF_OPERAND_SRCBE :
 825       value = fields->f_srcbe;
 826       break;
 827     case BPF_OPERAND_SRCLE :
 828       value = fields->f_srcle;
 829       break;
 830
 831     default :
 832       /* xgettext:c-format */
 833       opcodes_error_handler
 834         (_("internal error: unrecognized field %d while getting vma operand"),
 835          opindex);
 836       abort ();
 837   }
 838
 839   return value;
 840 }
 841
 842 void bpf_cgen_set_int_operand  (CGEN_CPU_DESC, int, CGEN_FIELDS *, int);
 843 void bpf_cgen_set_vma_operand  (CGEN_CPU_DESC, int, CGEN_FIELDS *, bfd_vma);
 844
 845 /* Stuffing values in cgen_fields is handled by a collection of functions.
 846    They are distinguished by the type of the VALUE argument they accept.
 847    TODO: floating point, inlining support, remove cases where argument type
 848    not appropriate.  */
 849
 850 void
 851 bpf_cgen_set_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 852                              int opindex,
 853                              CGEN_FIELDS * fields,
 854                              int value)
 855 {
 856   switch (opindex)
 857     {
 858     case BPF_OPERAND_DISP16 :
 859       fields->f_offset16 = value;
 860       break;
 861     case BPF_OPERAND_DISP32 :
 862       fields->f_imm32 = value;
 863       break;
 864     case BPF_OPERAND_DSTBE :
 865       fields->f_dstbe = value;
 866       break;
 867     case BPF_OPERAND_DSTLE :
 868       fields->f_dstle = value;
 869       break;
 870     case BPF_OPERAND_ENDSIZE :
 871       fields->f_imm32 = value;
 872       break;
 873     case BPF_OPERAND_IMM32 :
 874       fields->f_imm32 = value;
 875       break;
 876     case BPF_OPERAND_IMM64 :
 877       fields->f_imm64 = value;
 878       break;
 879     case BPF_OPERAND_OFFSET16 :
 880       fields->f_offset16 = value;
 881       break;
 882     case BPF_OPERAND_SRCBE :
 883       fields->f_srcbe = value;
 884       break;
 885     case BPF_OPERAND_SRCLE :
 886       fields->f_srcle = value;
 887       break;
 888
 889     default :
 890       /* xgettext:c-format */
 891       opcodes_error_handler
 892         (_("internal error: unrecognized field %d while setting int operand"),
 893          opindex);
 894       abort ();
 895   }
 896 }
 897
 898 void
 899 bpf_cgen_set_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 900                              int opindex,
 901                              CGEN_FIELDS * fields,
 902                              bfd_vma value)
 903 {
 904   switch (opindex)
 905     {
 906     case BPF_OPERAND_DISP16 :
 907       fields->f_offset16 = value;
 908       break;
 909     case BPF_OPERAND_DISP32 :
 910       fields->f_imm32 = value;
 911       break;
 912     case BPF_OPERAND_DSTBE :
 913       fields->f_dstbe = value;
 914       break;
 915     case BPF_OPERAND_DSTLE :
 916       fields->f_dstle = value;
 917       break;
 918     case BPF_OPERAND_ENDSIZE :
 919       fields->f_imm32 = value;
 920       break;
 921     case BPF_OPERAND_IMM32 :
 922       fields->f_imm32 = value;
 923       break;
 924     case BPF_OPERAND_IMM64 :
 925       fields->f_imm64 = value;
 926       break;
 927     case BPF_OPERAND_OFFSET16 :
 928       fields->f_offset16 = value;
 929       break;
 930     case BPF_OPERAND_SRCBE :
 931       fields->f_srcbe = value;
 932       break;
 933     case BPF_OPERAND_SRCLE :
 934       fields->f_srcle = value;
 935       break;
 936
 937     default :
 938       /* xgettext:c-format */
 939       opcodes_error_handler
 940         (_("internal error: unrecognized field %d while setting vma operand"),
 941          opindex);
 942       abort ();
 943   }
 944 }
 945
 946 /* Function to call before using the instruction builder tables.  */
 947
 948 void
 949 bpf_cgen_init_ibld_table (CGEN_CPU_DESC cd)
 950 {
 951   cd->insert_handlers = & bpf_cgen_insert_handlers[0];
 952   cd->extract_handlers = & bpf_cgen_extract_handlers[0];
 953
 954   cd->insert_operand = bpf_cgen_insert_operand;
 955   cd->extract_operand = bpf_cgen_extract_operand;
 956
 957   cd->get_int_operand = bpf_cgen_get_int_operand;
 958   cd->set_int_operand = bpf_cgen_set_int_operand;
 959   cd->get_vma_operand = bpf_cgen_get_vma_operand;
 960   cd->set_vma_operand = bpf_cgen_set_vma_operand;
 961 }