bfd/xtensa-isa.c

   1 /* Configurable Xtensa ISA support.
   2    Copyright 2003, 2004, 2005, 2007, 2008, 2009 Free Software Foundation, Inc.
   3
   4    This file is part of BFD, the Binary File Descriptor library.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  19    MA 02110-1301, USA.  */
  20
  21 #include "sysdep.h"
  22 #include "bfd.h"
  23 #include "libbfd.h"
  24 #include "xtensa-isa.h"
  25 #include "xtensa-isa-internal.h"
  26
  27 xtensa_isa_status xtisa_errno;
  28 char xtisa_error_msg[1024];
  29
  30
  31 xtensa_isa_status
  32 xtensa_isa_errno (xtensa_isa isa __attribute__ ((unused)))
  33 {
  34   return xtisa_errno;
  35 }
  36
  37
  38 char *
  39 xtensa_isa_error_msg (xtensa_isa isa __attribute__ ((unused)))
  40 {
  41   return xtisa_error_msg;
  42 }
  43
  44
  45 #define CHECK_ALLOC(MEM,ERRVAL) \
  46   do { \
  47     if ((MEM) == 0) \
  48       { \
  49         xtisa_errno = xtensa_isa_out_of_memory; \
  50         strcpy (xtisa_error_msg, "out of memory"); \
  51         return (ERRVAL); \
  52       } \
  53   } while (0)
  54
  55 #define CHECK_ALLOC_FOR_INIT(MEM,ERRVAL,ERRNO_P,ERROR_MSG_P) \
  56   do { \
  57     if ((MEM) == 0) \
  58       { \
  59         xtisa_errno = xtensa_isa_out_of_memory; \
  60         strcpy (xtisa_error_msg, "out of memory"); \
  61         if (ERRNO_P) *(ERRNO_P) = xtisa_errno; \
  62         if (ERROR_MSG_P) *(ERROR_MSG_P) = xtisa_error_msg; \
  63         return (ERRVAL); \
  64       } \
  65   } while (0)
  66
  67
  68 \f
  69 /* Instruction buffers.  */
  70
  71 int
  72 xtensa_insnbuf_size (xtensa_isa isa)
  73 {
  74   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
  75   return intisa->insnbuf_size;
  76 }
  77
  78
  79 xtensa_insnbuf
  80 xtensa_insnbuf_alloc (xtensa_isa isa)
  81 {
  82   xtensa_insnbuf result = (xtensa_insnbuf)
  83     malloc (xtensa_insnbuf_size (isa) * sizeof (xtensa_insnbuf_word));
  84   CHECK_ALLOC (result, 0);
  85   return result;
  86 }
  87
  88
  89 void
  90 xtensa_insnbuf_free (xtensa_isa isa __attribute__ ((unused)),
  91                      xtensa_insnbuf buf)
  92 {
  93   free (buf);
  94 }
  95
  96
  97 /* Given <byte_index>, the index of a byte in a xtensa_insnbuf, our
  98    internal representation of a xtensa instruction word, return the index of
  99    its word and the bit index of its low order byte in the xtensa_insnbuf.  */
 100
 101 static inline int
 102 byte_to_word_index (int byte_index)
 103 {
 104   return byte_index / sizeof (xtensa_insnbuf_word);
 105 }
 106
 107
 108 static inline int
 109 byte_to_bit_index (int byte_index)
 110 {
 111   return (byte_index & 0x3) * 8;
 112 }
 113
 114
 115 /* Copy an instruction in the 32-bit words pointed at by "insn" to
 116    characters pointed at by "cp".  This is more complicated than you
 117    might think because we want 16-bit instructions in bytes 2 & 3 for
 118    big-endian configurations.  This function allows us to specify
 119    which byte in "insn" to start with and which way to increment,
 120    allowing trivial implementation for both big- and little-endian
 121    configurations....and it seems to make pretty good code for
 122    both.  */
 123
 124 int
 125 xtensa_insnbuf_to_chars (xtensa_isa isa,
 126                          const xtensa_insnbuf insn,
 127                          unsigned char *cp,
 128                          int num_chars)
 129 {
 130   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 131   int insn_size = xtensa_isa_maxlength (isa);
 132   int fence_post, start, increment, i, byte_count;
 133   xtensa_format fmt;
 134
 135   if (num_chars == 0)
 136     num_chars = insn_size;
 137
 138   if (intisa->is_big_endian)
 139     {
 140       start = insn_size - 1;
 141       increment = -1;
 142     }
 143   else
 144     {
 145       start = 0;
 146       increment = 1;
 147     }
 148
 149   /* Find the instruction format.  Do nothing if the buffer does not contain
 150      a valid instruction since we need to know how many bytes to copy.  */
 151   fmt = xtensa_format_decode (isa, insn);
 152   if (fmt == XTENSA_UNDEFINED)
 153     return XTENSA_UNDEFINED;
 154
 155   byte_count = xtensa_format_length (isa, fmt);
 156   if (byte_count == XTENSA_UNDEFINED)
 157     return XTENSA_UNDEFINED;
 158
 159   if (byte_count > num_chars)
 160     {
 161       xtisa_errno = xtensa_isa_buffer_overflow;
 162       strcpy (xtisa_error_msg, "output buffer too small for instruction");
 163       return XTENSA_UNDEFINED;
 164     }
 165
 166   fence_post = start + (byte_count * increment);
 167
 168   for (i = start; i != fence_post; i += increment, ++cp)
 169     {
 170       int word_inx = byte_to_word_index (i);
 171       int bit_inx = byte_to_bit_index (i);
 172
 173       *cp = (insn[word_inx] >> bit_inx) & 0xff;
 174     }
 175
 176   return byte_count;
 177 }
 178
 179
 180 /* Inward conversion from byte stream to xtensa_insnbuf.  See
 181    xtensa_insnbuf_to_chars for a discussion of why this is complicated
 182    by endianness.  */
 183
 184 void
 185 xtensa_insnbuf_from_chars (xtensa_isa isa,
 186                            xtensa_insnbuf insn,
 187                            const unsigned char *cp,
 188                            int num_chars)
 189 {
 190   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 191   int max_size, insn_size, fence_post, start, increment, i;
 192
 193   max_size = xtensa_isa_maxlength (isa);
 194
 195   /* Decode the instruction length so we know how many bytes to read.  */
 196   insn_size = (intisa->length_decode_fn) (cp);
 197   if (insn_size == XTENSA_UNDEFINED)
 198     {
 199       /* This should never happen when the byte stream contains a
 200          valid instruction.  Just read the maximum number of bytes....  */
 201       insn_size = max_size;
 202     }
 203
 204   if (num_chars == 0 || num_chars > insn_size)
 205     num_chars = insn_size;
 206
 207   if (intisa->is_big_endian)
 208     {
 209       start = max_size - 1;
 210       increment = -1;
 211     }
 212   else
 213     {
 214       start = 0;
 215       increment = 1;
 216     }
 217
 218   fence_post = start + (num_chars * increment);
 219   memset (insn, 0, xtensa_insnbuf_size (isa) * sizeof (xtensa_insnbuf_word));
 220
 221   for (i = start; i != fence_post; i += increment, ++cp)
 222     {
 223       int word_inx = byte_to_word_index (i);
 224       int bit_inx = byte_to_bit_index (i);
 225
 226       insn[word_inx] |= (*cp & 0xff) << bit_inx;
 227     }
 228 }
 229
 230
 231 \f
 232 /* ISA information.  */
 233
 234 extern xtensa_isa_internal xtensa_modules;
 235
 236 xtensa_isa
 237 xtensa_isa_init (xtensa_isa_status *errno_p, char **error_msg_p)
 238 {
 239   xtensa_isa_internal *isa = &xtensa_modules;
 240   int n, is_user;
 241
 242   /* Set up the opcode name lookup table.  */
 243   isa->opname_lookup_table =
 244     bfd_malloc (isa->num_opcodes * sizeof (xtensa_lookup_entry));
 245   CHECK_ALLOC_FOR_INIT (isa->opname_lookup_table, NULL, errno_p, error_msg_p);
 246   for (n = 0; n < isa->num_opcodes; n++)
 247     {
 248       isa->opname_lookup_table[n].key = isa->opcodes[n].name;
 249       isa->opname_lookup_table[n].u.opcode = n;
 250     }
 251   qsort (isa->opname_lookup_table, isa->num_opcodes,
 252          sizeof (xtensa_lookup_entry), xtensa_isa_name_compare);
 253
 254   /* Set up the state name lookup table.  */
 255   isa->state_lookup_table =
 256     bfd_malloc (isa->num_states * sizeof (xtensa_lookup_entry));
 257   CHECK_ALLOC_FOR_INIT (isa->state_lookup_table, NULL, errno_p, error_msg_p);
 258   for (n = 0; n < isa->num_states; n++)
 259     {
 260       isa->state_lookup_table[n].key = isa->states[n].name;
 261       isa->state_lookup_table[n].u.state = n;
 262     }
 263   qsort (isa->state_lookup_table, isa->num_states,
 264          sizeof (xtensa_lookup_entry), xtensa_isa_name_compare);
 265
 266   /* Set up the sysreg name lookup table.  */
 267   isa->sysreg_lookup_table =
 268     bfd_malloc (isa->num_sysregs * sizeof (xtensa_lookup_entry));
 269   CHECK_ALLOC_FOR_INIT (isa->sysreg_lookup_table, NULL, errno_p, error_msg_p);
 270   for (n = 0; n < isa->num_sysregs; n++)
 271     {
 272       isa->sysreg_lookup_table[n].key = isa->sysregs[n].name;
 273       isa->sysreg_lookup_table[n].u.sysreg = n;
 274     }
 275   qsort (isa->sysreg_lookup_table, isa->num_sysregs,
 276          sizeof (xtensa_lookup_entry), xtensa_isa_name_compare);
 277
 278   /* Set up the user & system sysreg number tables.  */
 279   for (is_user = 0; is_user < 2; is_user++)
 280     {
 281       isa->sysreg_table[is_user] =
 282         bfd_malloc ((isa->max_sysreg_num[is_user] + 1)
 283                     * sizeof (xtensa_sysreg));
 284       CHECK_ALLOC_FOR_INIT (isa->sysreg_table[is_user], NULL,
 285                             errno_p, error_msg_p);
 286
 287       for (n = 0; n <= isa->max_sysreg_num[is_user]; n++)
 288         isa->sysreg_table[is_user][n] = XTENSA_UNDEFINED;
 289     }
 290   for (n = 0; n < isa->num_sysregs; n++)
 291     {
 292       xtensa_sysreg_internal *sreg = &isa->sysregs[n];
 293       is_user = sreg->is_user;
 294
 295       isa->sysreg_table[is_user][sreg->number] = n;
 296     }
 297
 298   /* Set up the interface lookup table.  */
 299   isa->interface_lookup_table =
 300     bfd_malloc (isa->num_interfaces * sizeof (xtensa_lookup_entry));
 301   CHECK_ALLOC_FOR_INIT (isa->interface_lookup_table, NULL, errno_p,
 302                         error_msg_p);
 303   for (n = 0; n < isa->num_interfaces; n++)
 304     {
 305       isa->interface_lookup_table[n].key = isa->interfaces[n].name;
 306       isa->interface_lookup_table[n].u.intf = n;
 307     }
 308   qsort (isa->interface_lookup_table, isa->num_interfaces,
 309          sizeof (xtensa_lookup_entry), xtensa_isa_name_compare);
 310
 311   /* Set up the funcUnit lookup table.  */
 312   isa->funcUnit_lookup_table =
 313     bfd_malloc (isa->num_funcUnits * sizeof (xtensa_lookup_entry));
 314   CHECK_ALLOC_FOR_INIT (isa->funcUnit_lookup_table, NULL, errno_p,
 315                         error_msg_p);
 316   for (n = 0; n < isa->num_funcUnits; n++)
 317     {
 318       isa->funcUnit_lookup_table[n].key = isa->funcUnits[n].name;
 319       isa->funcUnit_lookup_table[n].u.fun = n;
 320     }
 321   qsort (isa->funcUnit_lookup_table, isa->num_funcUnits,
 322          sizeof (xtensa_lookup_entry), xtensa_isa_name_compare);
 323
 324   isa->insnbuf_size = ((isa->insn_size + sizeof (xtensa_insnbuf_word) - 1) /
 325                        sizeof (xtensa_insnbuf_word));
 326
 327   return (xtensa_isa) isa;
 328 }
 329
 330
 331 void
 332 xtensa_isa_free (xtensa_isa isa)
 333 {
 334   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 335   int n;
 336
 337   /* With this version of the code, the xtensa_isa structure is not
 338      dynamically allocated, so this function is not essential.  Free
 339      the memory allocated by xtensa_isa_init and restore the xtensa_isa
 340      structure to its initial state.  */
 341
 342   if (intisa->opname_lookup_table)
 343     {
 344       free (intisa->opname_lookup_table);
 345       intisa->opname_lookup_table = 0;
 346     }
 347
 348   if (intisa->state_lookup_table)
 349     {
 350       free (intisa->state_lookup_table);
 351       intisa->state_lookup_table = 0;
 352     }
 353
 354   if (intisa->sysreg_lookup_table)
 355     {
 356       free (intisa->sysreg_lookup_table);
 357       intisa->sysreg_lookup_table = 0;
 358     }
 359   for (n = 0; n < 2; n++)
 360     {
 361       if (intisa->sysreg_table[n])
 362         {
 363           free (intisa->sysreg_table[n]);
 364           intisa->sysreg_table[n] = 0;
 365         }
 366     }
 367
 368   if (intisa->interface_lookup_table)
 369     {
 370       free (intisa->interface_lookup_table);
 371       intisa->interface_lookup_table = 0;
 372     }
 373
 374   if (intisa->funcUnit_lookup_table)
 375     {
 376       free (intisa->funcUnit_lookup_table);
 377       intisa->funcUnit_lookup_table = 0;
 378     }
 379 }
 380
 381
 382 int
 383 xtensa_isa_name_compare (const void *v1, const void *v2)
 384 {
 385   xtensa_lookup_entry *e1 = (xtensa_lookup_entry *) v1;
 386   xtensa_lookup_entry *e2 = (xtensa_lookup_entry *) v2;
 387
 388   return strcasecmp (e1->key, e2->key);
 389 }
 390
 391
 392 int
 393 xtensa_isa_maxlength (xtensa_isa isa)
 394 {
 395   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 396   return intisa->insn_size;
 397 }
 398
 399
 400 int
 401 xtensa_isa_length_from_chars (xtensa_isa isa, const unsigned char *cp)
 402 {
 403   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 404   return (intisa->length_decode_fn) (cp);
 405 }
 406
 407
 408 int
 409 xtensa_isa_num_pipe_stages (xtensa_isa isa)
 410 {
 411   xtensa_opcode opcode;
 412   xtensa_funcUnit_use *use;
 413   int num_opcodes, num_uses;
 414   int i, stage;
 415   static int max_stage = XTENSA_UNDEFINED;
 416
 417   /* Only compute the value once.  */
 418   if (max_stage != XTENSA_UNDEFINED)
 419     return max_stage + 1;
 420
 421   num_opcodes = xtensa_isa_num_opcodes (isa);
 422   for (opcode = 0; opcode < num_opcodes; opcode++)
 423     {
 424       num_uses = xtensa_opcode_num_funcUnit_uses (isa, opcode);
 425       for (i = 0; i < num_uses; i++)
 426         {
 427           use = xtensa_opcode_funcUnit_use (isa, opcode, i);
 428           stage = use->stage;
 429           if (stage > max_stage)
 430             max_stage = stage;
 431         }
 432     }
 433
 434   return max_stage + 1;
 435 }
 436
 437
 438 int
 439 xtensa_isa_num_formats (xtensa_isa isa)
 440 {
 441   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 442   return intisa->num_formats;
 443 }
 444
 445
 446 int
 447 xtensa_isa_num_opcodes (xtensa_isa isa)
 448 {
 449   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 450   return intisa->num_opcodes;
 451 }
 452
 453
 454 int
 455 xtensa_isa_num_regfiles (xtensa_isa isa)
 456 {
 457   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 458   return intisa->num_regfiles;
 459 }
 460
 461
 462 int
 463 xtensa_isa_num_states (xtensa_isa isa)
 464 {
 465   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 466   return intisa->num_states;
 467 }
 468
 469
 470 int
 471 xtensa_isa_num_sysregs (xtensa_isa isa)
 472 {
 473   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 474   return intisa->num_sysregs;
 475 }
 476
 477
 478 int
 479 xtensa_isa_num_interfaces (xtensa_isa isa)
 480 {
 481   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 482   return intisa->num_interfaces;
 483 }
 484
 485
 486 int
 487 xtensa_isa_num_funcUnits (xtensa_isa isa)
 488 {
 489   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 490   return intisa->num_funcUnits;
 491 }
 492
 493
 494 \f
 495 /* Instruction formats.  */
 496
 497
 498 #define CHECK_FORMAT(INTISA,FMT,ERRVAL) \
 499   do { \
 500     if ((FMT) < 0 || (FMT) >= (INTISA)->num_formats) \
 501       { \
 502         xtisa_errno = xtensa_isa_bad_format; \
 503         strcpy (xtisa_error_msg, "invalid format specifier"); \
 504         return (ERRVAL); \
 505       } \
 506   } while (0)
 507
 508
 509 #define CHECK_SLOT(INTISA,FMT,SLOT,ERRVAL) \
 510   do { \
 511     if ((SLOT) < 0 || (SLOT) >= (INTISA)->formats[FMT].num_slots) \
 512       { \
 513         xtisa_errno = xtensa_isa_bad_slot; \
 514         strcpy (xtisa_error_msg, "invalid slot specifier"); \
 515         return (ERRVAL); \
 516       } \
 517   } while (0)
 518
 519
 520 const char *
 521 xtensa_format_name (xtensa_isa isa, xtensa_format fmt)
 522 {
 523   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 524   CHECK_FORMAT (intisa, fmt, NULL);
 525   return intisa->formats[fmt].name;
 526 }
 527
 528
 529 xtensa_format
 530 xtensa_format_lookup (xtensa_isa isa, const char *fmtname)
 531 {
 532   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 533   int fmt;
 534
 535   if (!fmtname || !*fmtname)
 536     {
 537       xtisa_errno = xtensa_isa_bad_format;
 538       strcpy (xtisa_error_msg, "invalid format name");
 539       return XTENSA_UNDEFINED;
 540     }
 541
 542   for (fmt = 0; fmt < intisa->num_formats; fmt++)
 543     {
 544       if (strcasecmp (fmtname, intisa->formats[fmt].name) == 0)
 545         return fmt;
 546     }
 547
 548   xtisa_errno = xtensa_isa_bad_format;
 549   sprintf (xtisa_error_msg, "format \"%s\" not recognized", fmtname);
 550   return XTENSA_UNDEFINED;
 551 }
 552
 553
 554 xtensa_format
 555 xtensa_format_decode (xtensa_isa isa, const xtensa_insnbuf insn)
 556 {
 557   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 558   xtensa_format fmt;
 559
 560   fmt = (intisa->format_decode_fn) (insn);
 561   if (fmt != XTENSA_UNDEFINED)
 562     return fmt;
 563
 564   xtisa_errno = xtensa_isa_bad_format;
 565   strcpy (xtisa_error_msg, "cannot decode instruction format");
 566   return XTENSA_UNDEFINED;
 567 }
 568
 569
 570 int
 571 xtensa_format_encode (xtensa_isa isa, xtensa_format fmt, xtensa_insnbuf insn)
 572 {
 573   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 574   CHECK_FORMAT (intisa, fmt, -1);
 575   (*intisa->formats[fmt].encode_fn) (insn);
 576   return 0;
 577 }
 578
 579
 580 int
 581 xtensa_format_length (xtensa_isa isa, xtensa_format fmt)
 582 {
 583   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 584   CHECK_FORMAT (intisa, fmt, XTENSA_UNDEFINED);
 585   return intisa->formats[fmt].length;
 586 }
 587
 588
 589 int
 590 xtensa_format_num_slots (xtensa_isa isa, xtensa_format fmt)
 591 {
 592   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 593   CHECK_FORMAT (intisa, fmt, XTENSA_UNDEFINED);
 594   return intisa->formats[fmt].num_slots;
 595 }
 596
 597
 598 xtensa_opcode
 599 xtensa_format_slot_nop_opcode (xtensa_isa isa, xtensa_format fmt, int slot)
 600 {
 601   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 602   int slot_id;
 603
 604   CHECK_FORMAT (intisa, fmt, XTENSA_UNDEFINED);
 605   CHECK_SLOT (intisa, fmt, slot, XTENSA_UNDEFINED);
 606
 607   slot_id = intisa->formats[fmt].slot_id[slot];
 608   return xtensa_opcode_lookup (isa, intisa->slots[slot_id].nop_name);
 609 }
 610
 611
 612 int
 613 xtensa_format_get_slot (xtensa_isa isa, xtensa_format fmt, int slot,
 614                         const xtensa_insnbuf insn, xtensa_insnbuf slotbuf)
 615 {
 616   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 617   int slot_id;
 618
 619   CHECK_FORMAT (intisa, fmt, -1);
 620   CHECK_SLOT (intisa, fmt, slot, -1);
 621
 622   slot_id = intisa->formats[fmt].slot_id[slot];
 623   (*intisa->slots[slot_id].get_fn) (insn, slotbuf);
 624   return 0;
 625 }
 626
 627
 628 int
 629 xtensa_format_set_slot (xtensa_isa isa, xtensa_format fmt, int slot,
 630                         xtensa_insnbuf insn, const xtensa_insnbuf slotbuf)
 631 {
 632   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 633   int slot_id;
 634
 635   CHECK_FORMAT (intisa, fmt, -1);
 636   CHECK_SLOT (intisa, fmt, slot, -1);
 637
 638   slot_id = intisa->formats[fmt].slot_id[slot];
 639   (*intisa->slots[slot_id].set_fn) (insn, slotbuf);
 640   return 0;
 641 }
 642
 643
 644 \f
 645 /* Opcode information.  */
 646
 647
 648 #define CHECK_OPCODE(INTISA,OPC,ERRVAL) \
 649   do { \
 650     if ((OPC) < 0 || (OPC) >= (INTISA)->num_opcodes) \
 651       { \
 652         xtisa_errno = xtensa_isa_bad_opcode; \
 653         strcpy (xtisa_error_msg, "invalid opcode specifier"); \
 654         return (ERRVAL); \
 655       } \
 656   } while (0)
 657
 658
 659 xtensa_opcode
 660 xtensa_opcode_lookup (xtensa_isa isa, const char *opname)
 661 {
 662   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 663   xtensa_lookup_entry entry, *result = 0;
 664
 665   if (!opname || !*opname)
 666     {
 667       xtisa_errno = xtensa_isa_bad_opcode;
 668       strcpy (xtisa_error_msg, "invalid opcode name");
 669       return XTENSA_UNDEFINED;
 670     }
 671
 672   if (intisa->num_opcodes != 0)
 673     {
 674       entry.key = opname;
 675       result = bsearch (&entry, intisa->opname_lookup_table,
 676                         intisa->num_opcodes, sizeof (xtensa_lookup_entry),
 677                         xtensa_isa_name_compare);
 678     }
 679
 680   if (!result)
 681     {
 682       xtisa_errno = xtensa_isa_bad_opcode;
 683       sprintf (xtisa_error_msg, "opcode \"%s\" not recognized", opname);
 684       return XTENSA_UNDEFINED;
 685     }
 686
 687   return result->u.opcode;
 688 }
 689
 690
 691 xtensa_opcode
 692 xtensa_opcode_decode (xtensa_isa isa, xtensa_format fmt, int slot,
 693                       const xtensa_insnbuf slotbuf)
 694 {
 695   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 696   int slot_id;
 697   xtensa_opcode opc;
 698
 699   CHECK_FORMAT (intisa, fmt, XTENSA_UNDEFINED);
 700   CHECK_SLOT (intisa, fmt, slot, XTENSA_UNDEFINED);
 701
 702   slot_id = intisa->formats[fmt].slot_id[slot];
 703
 704   opc = (intisa->slots[slot_id].opcode_decode_fn) (slotbuf);
 705   if (opc != XTENSA_UNDEFINED)
 706     return opc;
 707
 708   xtisa_errno = xtensa_isa_bad_opcode;
 709   strcpy (xtisa_error_msg, "cannot decode opcode");
 710   return XTENSA_UNDEFINED;
 711 }
 712
 713
 714 int
 715 xtensa_opcode_encode (xtensa_isa isa, xtensa_format fmt, int slot,
 716                       xtensa_insnbuf slotbuf, xtensa_opcode opc)
 717 {
 718   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 719   int slot_id;
 720   xtensa_opcode_encode_fn encode_fn;
 721
 722   CHECK_FORMAT (intisa, fmt, -1);
 723   CHECK_SLOT (intisa, fmt, slot, -1);
 724   CHECK_OPCODE (intisa, opc, -1);
 725
 726   slot_id = intisa->formats[fmt].slot_id[slot];
 727   encode_fn = intisa->opcodes[opc].encode_fns[slot_id];
 728   if (!encode_fn)
 729     {
 730       xtisa_errno = xtensa_isa_wrong_slot;
 731       sprintf (xtisa_error_msg,
 732                "opcode \"%s\" is not allowed in slot %d of format \"%s\"",
 733                intisa->opcodes[opc].name, slot, intisa->formats[fmt].name);
 734       return -1;
 735     }
 736   (*encode_fn) (slotbuf);
 737   return 0;
 738 }
 739
 740
 741 const char *
 742 xtensa_opcode_name (xtensa_isa isa, xtensa_opcode opc)
 743 {
 744   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 745   CHECK_OPCODE (intisa, opc, NULL);
 746   return intisa->opcodes[opc].name;
 747 }
 748
 749
 750 int
 751 xtensa_opcode_is_branch (xtensa_isa isa, xtensa_opcode opc)
 752 {
 753   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 754   CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
 755   if ((intisa->opcodes[opc].flags & XTENSA_OPCODE_IS_BRANCH) != 0)
 756     return 1;
 757   return 0;
 758 }
 759
 760
 761 int
 762 xtensa_opcode_is_jump (xtensa_isa isa, xtensa_opcode opc)
 763 {
 764   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 765   CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
 766   if ((intisa->opcodes[opc].flags & XTENSA_OPCODE_IS_JUMP) != 0)
 767     return 1;
 768   return 0;
 769 }
 770
 771
 772 int
 773 xtensa_opcode_is_loop (xtensa_isa isa, xtensa_opcode opc)
 774 {
 775   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 776   CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
 777   if ((intisa->opcodes[opc].flags & XTENSA_OPCODE_IS_LOOP) != 0)
 778     return 1;
 779   return 0;
 780 }
 781
 782
 783 int
 784 xtensa_opcode_is_call (xtensa_isa isa, xtensa_opcode opc)
 785 {
 786   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 787   CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
 788   if ((intisa->opcodes[opc].flags & XTENSA_OPCODE_IS_CALL) != 0)
 789     return 1;
 790   return 0;
 791 }
 792
 793
 794 int
 795 xtensa_opcode_num_operands (xtensa_isa isa, xtensa_opcode opc)
 796 {
 797   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 798   int iclass_id;
 799
 800   CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
 801   iclass_id = intisa->opcodes[opc].iclass_id;
 802   return intisa->iclasses[iclass_id].num_operands;
 803 }
 804
 805
 806 int
 807 xtensa_opcode_num_stateOperands (xtensa_isa isa, xtensa_opcode opc)
 808 {
 809   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 810   int iclass_id;
 811
 812   CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
 813   iclass_id = intisa->opcodes[opc].iclass_id;
 814   return intisa->iclasses[iclass_id].num_stateOperands;
 815 }
 816
 817
 818 int
 819 xtensa_opcode_num_interfaceOperands (xtensa_isa isa, xtensa_opcode opc)
 820 {
 821   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 822   int iclass_id;
 823
 824   CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
 825   iclass_id = intisa->opcodes[opc].iclass_id;
 826   return intisa->iclasses[iclass_id].num_interfaceOperands;
 827 }
 828
 829
 830 int
 831 xtensa_opcode_num_funcUnit_uses (xtensa_isa isa, xtensa_opcode opc)
 832 {
 833   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 834   CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
 835   return intisa->opcodes[opc].num_funcUnit_uses;
 836 }
 837
 838
 839 xtensa_funcUnit_use *
 840 xtensa_opcode_funcUnit_use (xtensa_isa isa, xtensa_opcode opc, int u)
 841 {
 842   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 843   CHECK_OPCODE (intisa, opc, NULL);
 844   if (u < 0 || u >= intisa->opcodes[opc].num_funcUnit_uses)
 845     {
 846       xtisa_errno = xtensa_isa_bad_funcUnit;
 847       sprintf (xtisa_error_msg, "invalid functional unit use number (%d); "
 848                "opcode \"%s\" has %d", u, intisa->opcodes[opc].name,
 849                intisa->opcodes[opc].num_funcUnit_uses);
 850       return NULL;
 851     }
 852   return &intisa->opcodes[opc].funcUnit_uses[u];
 853 }
 854
 855
 856 \f
 857 /* Operand information.  */
 858
 859
 860 #define CHECK_OPERAND(INTISA,OPC,ICLASS,OPND,ERRVAL) \
 861   do { \
 862     if ((OPND) < 0 || (OPND) >= (ICLASS)->num_operands) \
 863       { \
 864         xtisa_errno = xtensa_isa_bad_operand; \
 865         sprintf (xtisa_error_msg, "invalid operand number (%d); " \
 866                  "opcode \"%s\" has %d operands", (OPND), \
 867                  (INTISA)->opcodes[(OPC)].name, (ICLASS)->num_operands); \
 868         return (ERRVAL); \
 869       } \
 870   } while (0)
 871
 872
 873 static xtensa_operand_internal *
 874 get_operand (xtensa_isa_internal *intisa, xtensa_opcode opc, int opnd)
 875 {
 876   xtensa_iclass_internal *iclass;
 877   int iclass_id, operand_id;
 878
 879   CHECK_OPCODE (intisa, opc, NULL);
 880   iclass_id = intisa->opcodes[opc].iclass_id;
 881   iclass = &intisa->iclasses[iclass_id];
 882   CHECK_OPERAND (intisa, opc, iclass, opnd, NULL);
 883   operand_id = iclass->operands[opnd].u.operand_id;
 884   return &intisa->operands[operand_id];
 885 }
 886
 887
 888 const char *
 889 xtensa_operand_name (xtensa_isa isa, xtensa_opcode opc, int opnd)
 890 {
 891   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 892   xtensa_operand_internal *intop;
 893
 894   intop = get_operand (intisa, opc, opnd);
 895   if (!intop) return NULL;
 896   return intop->name;
 897 }
 898
 899
 900 int
 901 xtensa_operand_is_visible (xtensa_isa isa, xtensa_opcode opc, int opnd)
 902 {
 903   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 904   xtensa_iclass_internal *iclass;
 905   int iclass_id, operand_id;
 906   xtensa_operand_internal *intop;
 907
 908   CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
 909   iclass_id = intisa->opcodes[opc].iclass_id;
 910   iclass = &intisa->iclasses[iclass_id];
 911   CHECK_OPERAND (intisa, opc, iclass, opnd, XTENSA_UNDEFINED);
 912
 913   /* Special case for "sout" operands.  */
 914   if (iclass->operands[opnd].inout == 's')
 915     return 0;
 916
 917   operand_id = iclass->operands[opnd].u.operand_id;
 918   intop = &intisa->operands[operand_id];
 919
 920   if ((intop->flags & XTENSA_OPERAND_IS_INVISIBLE) == 0)
 921     return 1;
 922   return 0;
 923 }
 924
 925
 926 char
 927 xtensa_operand_inout (xtensa_isa isa, xtensa_opcode opc, int opnd)
 928 {
 929   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 930   xtensa_iclass_internal *iclass;
 931   int iclass_id;
 932   char inout;
 933
 934   CHECK_OPCODE (intisa, opc, 0);
 935   iclass_id = intisa->opcodes[opc].iclass_id;
 936   iclass = &intisa->iclasses[iclass_id];
 937   CHECK_OPERAND (intisa, opc, iclass, opnd, 0);
 938   inout = iclass->operands[opnd].inout;
 939
 940   /* Special case for "sout" operands.  */
 941   if (inout == 's')
 942     return 'o';
 943
 944   return inout;
 945 }
 946
 947
 948 int
 949 xtensa_operand_get_field (xtensa_isa isa, xtensa_opcode opc, int opnd,
 950                           xtensa_format fmt, int slot,
 951                           const xtensa_insnbuf slotbuf, uint32 *valp)
 952 {
 953   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 954   xtensa_operand_internal *intop;
 955   int slot_id;
 956   xtensa_get_field_fn get_fn;
 957
 958   intop = get_operand (intisa, opc, opnd);
 959   if (!intop) return -1;
 960
 961   CHECK_FORMAT (intisa, fmt, -1);
 962   CHECK_SLOT (intisa, fmt, slot, -1);
 963
 964   slot_id = intisa->formats[fmt].slot_id[slot];
 965   if (intop->field_id == XTENSA_UNDEFINED)
 966     {
 967       xtisa_errno = xtensa_isa_no_field;
 968       strcpy (xtisa_error_msg, "implicit operand has no field");
 969       return -1;
 970     }
 971   get_fn = intisa->slots[slot_id].get_field_fns[intop->field_id];
 972   if (!get_fn)
 973     {
 974       xtisa_errno = xtensa_isa_wrong_slot;
 975       sprintf (xtisa_error_msg,
 976                "operand \"%s\" does not exist in slot %d of format \"%s\"",
 977                intop->name, slot, intisa->formats[fmt].name);
 978       return -1;
 979     }
 980   *valp = (*get_fn) (slotbuf);
 981   return 0;
 982 }
 983
 984
 985 int
 986 xtensa_operand_set_field (xtensa_isa isa, xtensa_opcode opc, int opnd,
 987                           xtensa_format fmt, int slot,
 988                           xtensa_insnbuf slotbuf, uint32 val)
 989 {
 990   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
 991   xtensa_operand_internal *intop;
 992   int slot_id;
 993   xtensa_set_field_fn set_fn;
 994
 995   intop = get_operand (intisa, opc, opnd);
 996   if (!intop) return -1;
 997
 998   CHECK_FORMAT (intisa, fmt, -1);
 999   CHECK_SLOT (intisa, fmt, slot, -1);
1000
1001   slot_id = intisa->formats[fmt].slot_id[slot];
1002   if (intop->field_id == XTENSA_UNDEFINED)
1003     {
1004       xtisa_errno = xtensa_isa_no_field;
1005       strcpy (xtisa_error_msg, "implicit operand has no field");
1006       return -1;
1007     }
1008   set_fn = intisa->slots[slot_id].set_field_fns[intop->field_id];
1009   if (!set_fn)
1010     {
1011       xtisa_errno = xtensa_isa_wrong_slot;
1012       sprintf (xtisa_error_msg,
1013                "operand \"%s\" does not exist in slot %d of format \"%s\"",
1014                intop->name, slot, intisa->formats[fmt].name);
1015       return -1;
1016     }
1017   (*set_fn) (slotbuf, val);
1018   return 0;
1019 }
1020
1021
1022 int
1023 xtensa_operand_encode (xtensa_isa isa, xtensa_opcode opc, int opnd,
1024                        uint32 *valp)
1025 {
1026   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1027   xtensa_operand_internal *intop;
1028   uint32 test_val, orig_val;
1029
1030   intop = get_operand (intisa, opc, opnd);
1031   if (!intop)
1032     return -1;
1033
1034   if (!intop->encode)
1035     {
1036       /* This is a default operand for a field.  How can we tell if the
1037          value fits in the field?  Write the value into the field,
1038          read it back, and then make sure we get the same value.  */
1039       static xtensa_insnbuf tmpbuf = 0;
1040       int slot_id;
1041
1042       if (!tmpbuf)
1043         {
1044           tmpbuf = xtensa_insnbuf_alloc (isa);
1045           CHECK_ALLOC (tmpbuf, -1);
1046         }
1047
1048       /* A default operand is always associated with a field,
1049          but check just to be sure....  */
1050       if (intop->field_id == XTENSA_UNDEFINED)
1051         {
1052           xtisa_errno = xtensa_isa_internal_error;
1053           strcpy (xtisa_error_msg, "operand has no field");
1054           return -1;
1055         }
1056
1057       /* Find some slot that includes the field.  */
1058       for (slot_id = 0; slot_id < intisa->num_slots; slot_id++)
1059         {
1060           xtensa_get_field_fn get_fn =
1061             intisa->slots[slot_id].get_field_fns[intop->field_id];
1062           xtensa_set_field_fn set_fn =
1063             intisa->slots[slot_id].set_field_fns[intop->field_id];
1064
1065           if (get_fn && set_fn)
1066             {
1067               (*set_fn) (tmpbuf, *valp);
1068               return ((*get_fn) (tmpbuf) != *valp);
1069             }
1070         }
1071
1072       /* Couldn't find any slot containing the field....  */
1073       xtisa_errno = xtensa_isa_no_field;
1074       strcpy (xtisa_error_msg, "field does not exist in any slot");
1075       return -1;
1076     }
1077
1078   /* Encode the value.  In some cases, the encoding function may detect
1079      errors, but most of the time the only way to determine if the value
1080      was successfully encoded is to decode it and check if it matches
1081      the original value.  */
1082   orig_val = *valp;
1083   if ((*intop->encode) (valp)
1084       || (test_val = *valp, (*intop->decode) (&test_val))
1085       || test_val != orig_val)
1086     {
1087       xtisa_errno = xtensa_isa_bad_value;
1088       sprintf (xtisa_error_msg, "cannot encode operand value 0x%08x", *valp);
1089       return -1;
1090     }
1091
1092   return 0;
1093 }
1094
1095
1096 int
1097 xtensa_operand_decode (xtensa_isa isa, xtensa_opcode opc, int opnd,
1098                        uint32 *valp)
1099 {
1100   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1101   xtensa_operand_internal *intop;
1102
1103   intop = get_operand (intisa, opc, opnd);
1104   if (!intop) return -1;
1105
1106   /* Use identity function for "default" operands.  */
1107   if (!intop->decode)
1108     return 0;
1109
1110   if ((*intop->decode) (valp))
1111     {
1112       xtisa_errno = xtensa_isa_bad_value;
1113       sprintf (xtisa_error_msg, "cannot decode operand value 0x%08x", *valp);
1114       return -1;
1115     }
1116   return 0;
1117 }
1118
1119
1120 int
1121 xtensa_operand_is_register (xtensa_isa isa, xtensa_opcode opc, int opnd)
1122 {
1123   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1124   xtensa_operand_internal *intop;
1125
1126   intop = get_operand (intisa, opc, opnd);
1127   if (!intop) return XTENSA_UNDEFINED;
1128
1129   if ((intop->flags & XTENSA_OPERAND_IS_REGISTER) != 0)
1130     return 1;
1131   return 0;
1132 }
1133
1134
1135 xtensa_regfile
1136 xtensa_operand_regfile (xtensa_isa isa, xtensa_opcode opc, int opnd)
1137 {
1138   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1139   xtensa_operand_internal *intop;
1140
1141   intop = get_operand (intisa, opc, opnd);
1142   if (!intop) return XTENSA_UNDEFINED;
1143
1144   return intop->regfile;
1145 }
1146
1147
1148 int
1149 xtensa_operand_num_regs (xtensa_isa isa, xtensa_opcode opc, int opnd)
1150 {
1151   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1152   xtensa_operand_internal *intop;
1153
1154   intop = get_operand (intisa, opc, opnd);
1155   if (!intop) return XTENSA_UNDEFINED;
1156
1157   return intop->num_regs;
1158 }
1159
1160
1161 int
1162 xtensa_operand_is_known_reg (xtensa_isa isa, xtensa_opcode opc, int opnd)
1163 {
1164   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1165   xtensa_operand_internal *intop;
1166
1167   intop = get_operand (intisa, opc, opnd);
1168   if (!intop) return XTENSA_UNDEFINED;
1169
1170   if ((intop->flags & XTENSA_OPERAND_IS_UNKNOWN) == 0)
1171     return 1;
1172   return 0;
1173 }
1174
1175
1176 int
1177 xtensa_operand_is_PCrelative (xtensa_isa isa, xtensa_opcode opc, int opnd)
1178 {
1179   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1180   xtensa_operand_internal *intop;
1181
1182   intop = get_operand (intisa, opc, opnd);
1183   if (!intop) return XTENSA_UNDEFINED;
1184
1185   if ((intop->flags & XTENSA_OPERAND_IS_PCRELATIVE) != 0)
1186     return 1;
1187   return 0;
1188 }
1189
1190
1191 int
1192 xtensa_operand_do_reloc (xtensa_isa isa, xtensa_opcode opc, int opnd,
1193                          uint32 *valp, uint32 pc)
1194 {
1195   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1196   xtensa_operand_internal *intop;
1197
1198   intop = get_operand (intisa, opc, opnd);
1199   if (!intop) return -1;
1200
1201   if ((intop->flags & XTENSA_OPERAND_IS_PCRELATIVE) == 0)
1202     return 0;
1203
1204   if (!intop->do_reloc)
1205     {
1206       xtisa_errno = xtensa_isa_internal_error;
1207       strcpy (xtisa_error_msg, "operand missing do_reloc function");
1208       return -1;
1209     }
1210
1211   if ((*intop->do_reloc) (valp, pc))
1212     {
1213       xtisa_errno = xtensa_isa_bad_value;
1214       sprintf (xtisa_error_msg,
1215                "do_reloc failed for value 0x%08x at PC 0x%08x", *valp, pc);
1216       return -1;
1217     }
1218
1219   return 0;
1220 }
1221
1222
1223 int
1224 xtensa_operand_undo_reloc (xtensa_isa isa, xtensa_opcode opc, int opnd,
1225                            uint32 *valp, uint32 pc)
1226 {
1227   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1228   xtensa_operand_internal *intop;
1229
1230   intop = get_operand (intisa, opc, opnd);
1231   if (!intop) return -1;
1232
1233   if ((intop->flags & XTENSA_OPERAND_IS_PCRELATIVE) == 0)
1234     return 0;
1235
1236   if (!intop->undo_reloc)
1237     {
1238       xtisa_errno = xtensa_isa_internal_error;
1239       strcpy (xtisa_error_msg, "operand missing undo_reloc function");
1240       return -1;
1241     }
1242
1243   if ((*intop->undo_reloc) (valp, pc))
1244     {
1245       xtisa_errno = xtensa_isa_bad_value;
1246       sprintf (xtisa_error_msg,
1247                "undo_reloc failed for value 0x%08x at PC 0x%08x", *valp, pc);
1248       return -1;
1249     }
1250
1251   return 0;
1252 }
1253
1254
1255 \f
1256 /* State Operands.  */
1257
1258
1259 #define CHECK_STATE_OPERAND(INTISA,OPC,ICLASS,STOP,ERRVAL) \
1260   do { \
1261     if ((STOP) < 0 || (STOP) >= (ICLASS)->num_stateOperands) \
1262       { \
1263         xtisa_errno = xtensa_isa_bad_operand; \
1264         sprintf (xtisa_error_msg, "invalid state operand number (%d); " \
1265                  "opcode \"%s\" has %d state operands", (STOP), \
1266                  (INTISA)->opcodes[(OPC)].name, (ICLASS)->num_stateOperands); \
1267         return (ERRVAL); \
1268       } \
1269   } while (0)
1270
1271
1272 xtensa_state
1273 xtensa_stateOperand_state (xtensa_isa isa, xtensa_opcode opc, int stOp)
1274 {
1275   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1276   xtensa_iclass_internal *iclass;
1277   int iclass_id;
1278
1279   CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
1280   iclass_id = intisa->opcodes[opc].iclass_id;
1281   iclass = &intisa->iclasses[iclass_id];
1282   CHECK_STATE_OPERAND (intisa, opc, iclass, stOp, XTENSA_UNDEFINED);
1283   return iclass->stateOperands[stOp].u.state;
1284 }
1285
1286
1287 char
1288 xtensa_stateOperand_inout (xtensa_isa isa, xtensa_opcode opc, int stOp)
1289 {
1290   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1291   xtensa_iclass_internal *iclass;
1292   int iclass_id;
1293
1294   CHECK_OPCODE (intisa, opc, 0);
1295   iclass_id = intisa->opcodes[opc].iclass_id;
1296   iclass = &intisa->iclasses[iclass_id];
1297   CHECK_STATE_OPERAND (intisa, opc, iclass, stOp, 0);
1298   return iclass->stateOperands[stOp].inout;
1299 }
1300
1301
1302 \f
1303 /* Interface Operands.  */
1304
1305
1306 #define CHECK_INTERFACE_OPERAND(INTISA,OPC,ICLASS,IFOP,ERRVAL) \
1307   do { \
1308     if ((IFOP) < 0 || (IFOP) >= (ICLASS)->num_interfaceOperands) \
1309       { \
1310         xtisa_errno = xtensa_isa_bad_operand; \
1311         sprintf (xtisa_error_msg, "invalid interface operand number (%d); " \
1312                  "opcode \"%s\" has %d interface operands", (IFOP), \
1313                  (INTISA)->opcodes[(OPC)].name, \
1314                  (ICLASS)->num_interfaceOperands); \
1315         return (ERRVAL); \
1316       } \
1317   } while (0)
1318
1319
1320 xtensa_interface
1321 xtensa_interfaceOperand_interface (xtensa_isa isa, xtensa_opcode opc,
1322                                    int ifOp)
1323 {
1324   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1325   xtensa_iclass_internal *iclass;
1326   int iclass_id;
1327
1328   CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
1329   iclass_id = intisa->opcodes[opc].iclass_id;
1330   iclass = &intisa->iclasses[iclass_id];
1331   CHECK_INTERFACE_OPERAND (intisa, opc, iclass, ifOp, XTENSA_UNDEFINED);
1332   return iclass->interfaceOperands[ifOp];
1333 }
1334
1335
1336 \f
1337 /* Register Files.  */
1338
1339
1340 #define CHECK_REGFILE(INTISA,RF,ERRVAL) \
1341   do { \
1342     if ((RF) < 0 || (RF) >= (INTISA)->num_regfiles) \
1343       { \
1344         xtisa_errno = xtensa_isa_bad_regfile; \
1345         strcpy (xtisa_error_msg, "invalid regfile specifier"); \
1346         return (ERRVAL); \
1347       } \
1348   } while (0)
1349
1350
1351 xtensa_regfile
1352 xtensa_regfile_lookup (xtensa_isa isa, const char *name)
1353 {
1354   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1355   int n;
1356
1357   if (!name || !*name)
1358     {
1359       xtisa_errno = xtensa_isa_bad_regfile;
1360       strcpy (xtisa_error_msg, "invalid regfile name");
1361       return XTENSA_UNDEFINED;
1362     }
1363
1364   /* The expected number of regfiles is small; use a linear search.  */
1365   for (n = 0; n < intisa->num_regfiles; n++)
1366     {
1367       if (!filename_cmp (intisa->regfiles[n].name, name))
1368         return n;
1369     }
1370
1371   xtisa_errno = xtensa_isa_bad_regfile;
1372   sprintf (xtisa_error_msg, "regfile \"%s\" not recognized", name);
1373   return XTENSA_UNDEFINED;
1374 }
1375
1376
1377 xtensa_regfile
1378 xtensa_regfile_lookup_shortname (xtensa_isa isa, const char *shortname)
1379 {
1380   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1381   int n;
1382
1383   if (!shortname || !*shortname)
1384     {
1385       xtisa_errno = xtensa_isa_bad_regfile;
1386       strcpy (xtisa_error_msg, "invalid regfile shortname");
1387       return XTENSA_UNDEFINED;
1388     }
1389
1390   /* The expected number of regfiles is small; use a linear search.  */
1391   for (n = 0; n < intisa->num_regfiles; n++)
1392     {
1393       /* Ignore regfile views since they always have the same shortnames
1394          as their parents.  */
1395       if (intisa->regfiles[n].parent != n)
1396         continue;
1397       if (!filename_cmp (intisa->regfiles[n].shortname, shortname))
1398         return n;
1399     }
1400
1401   xtisa_errno = xtensa_isa_bad_regfile;
1402   sprintf (xtisa_error_msg, "regfile shortname \"%s\" not recognized",
1403            shortname);
1404   return XTENSA_UNDEFINED;
1405 }
1406
1407
1408 const char *
1409 xtensa_regfile_name (xtensa_isa isa, xtensa_regfile rf)
1410 {
1411   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1412   CHECK_REGFILE (intisa, rf, NULL);
1413   return intisa->regfiles[rf].name;
1414 }
1415
1416
1417 const char *
1418 xtensa_regfile_shortname (xtensa_isa isa, xtensa_regfile rf)
1419 {
1420   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1421   CHECK_REGFILE (intisa, rf, NULL);
1422   return intisa->regfiles[rf].shortname;
1423 }
1424
1425
1426 xtensa_regfile
1427 xtensa_regfile_view_parent (xtensa_isa isa, xtensa_regfile rf)
1428 {
1429   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1430   CHECK_REGFILE (intisa, rf, XTENSA_UNDEFINED);
1431   return intisa->regfiles[rf].parent;
1432 }
1433
1434
1435 int
1436 xtensa_regfile_num_bits (xtensa_isa isa, xtensa_regfile rf)
1437 {
1438   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1439   CHECK_REGFILE (intisa, rf, XTENSA_UNDEFINED);
1440   return intisa->regfiles[rf].num_bits;
1441 }
1442
1443
1444 int
1445 xtensa_regfile_num_entries (xtensa_isa isa, xtensa_regfile rf)
1446 {
1447   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1448   CHECK_REGFILE (intisa, rf, XTENSA_UNDEFINED);
1449   return intisa->regfiles[rf].num_entries;
1450 }
1451
1452
1453 \f
1454 /* Processor States.  */
1455
1456
1457 #define CHECK_STATE(INTISA,ST,ERRVAL) \
1458   do { \
1459     if ((ST) < 0 || (ST) >= (INTISA)->num_states) \
1460       { \
1461         xtisa_errno = xtensa_isa_bad_state; \
1462         strcpy (xtisa_error_msg, "invalid state specifier"); \
1463         return (ERRVAL); \
1464       } \
1465   } while (0)
1466
1467
1468 xtensa_state
1469 xtensa_state_lookup (xtensa_isa isa, const char *name)
1470 {
1471   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1472   xtensa_lookup_entry entry, *result = 0;
1473
1474   if (!name || !*name)
1475     {
1476       xtisa_errno = xtensa_isa_bad_state;
1477       strcpy (xtisa_error_msg, "invalid state name");
1478       return XTENSA_UNDEFINED;
1479     }
1480
1481   if (intisa->num_states != 0)
1482     {
1483       entry.key = name;
1484       result = bsearch (&entry, intisa->state_lookup_table, intisa->num_states,
1485                         sizeof (xtensa_lookup_entry), xtensa_isa_name_compare);
1486     }
1487
1488   if (!result)
1489     {
1490       xtisa_errno = xtensa_isa_bad_state;
1491       sprintf (xtisa_error_msg, "state \"%s\" not recognized", name);
1492       return XTENSA_UNDEFINED;
1493     }
1494
1495   return result->u.state;
1496 }
1497
1498
1499 const char *
1500 xtensa_state_name (xtensa_isa isa, xtensa_state st)
1501 {
1502   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1503   CHECK_STATE (intisa, st, NULL);
1504   return intisa->states[st].name;
1505 }
1506
1507
1508 int
1509 xtensa_state_num_bits (xtensa_isa isa, xtensa_state st)
1510 {
1511   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1512   CHECK_STATE (intisa, st, XTENSA_UNDEFINED);
1513   return intisa->states[st].num_bits;
1514 }
1515
1516
1517 int
1518 xtensa_state_is_exported (xtensa_isa isa, xtensa_state st)
1519 {
1520   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1521   CHECK_STATE (intisa, st, XTENSA_UNDEFINED);
1522   if ((intisa->states[st].flags & XTENSA_STATE_IS_EXPORTED) != 0)
1523     return 1;
1524   return 0;
1525 }
1526
1527
1528 int
1529 xtensa_state_is_shared_or (xtensa_isa isa, xtensa_state st)
1530 {
1531   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1532   CHECK_STATE (intisa, st, XTENSA_UNDEFINED);
1533   if ((intisa->states[st].flags & XTENSA_STATE_IS_SHARED_OR) != 0)
1534     return 1;
1535   return 0;
1536 }
1537
1538
1539 \f
1540 /* Sysregs.  */
1541
1542
1543 #define CHECK_SYSREG(INTISA,SYSREG,ERRVAL) \
1544   do { \
1545     if ((SYSREG) < 0 || (SYSREG) >= (INTISA)->num_sysregs) \
1546       { \
1547         xtisa_errno = xtensa_isa_bad_sysreg; \
1548         strcpy (xtisa_error_msg, "invalid sysreg specifier"); \
1549         return (ERRVAL); \
1550       } \
1551   } while (0)
1552
1553
1554 xtensa_sysreg
1555 xtensa_sysreg_lookup (xtensa_isa isa, int num, int is_user)
1556 {
1557   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1558
1559   if (is_user != 0)
1560     is_user = 1;
1561
1562   if (num < 0 || num > intisa->max_sysreg_num[is_user]
1563       || intisa->sysreg_table[is_user][num] == XTENSA_UNDEFINED)
1564     {
1565       xtisa_errno = xtensa_isa_bad_sysreg;
1566       strcpy (xtisa_error_msg, "sysreg not recognized");
1567       return XTENSA_UNDEFINED;
1568     }
1569
1570   return intisa->sysreg_table[is_user][num];
1571 }
1572
1573
1574 xtensa_sysreg
1575 xtensa_sysreg_lookup_name (xtensa_isa isa, const char *name)
1576 {
1577   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1578   xtensa_lookup_entry entry, *result = 0;
1579
1580   if (!name || !*name)
1581     {
1582       xtisa_errno = xtensa_isa_bad_sysreg;
1583       strcpy (xtisa_error_msg, "invalid sysreg name");
1584       return XTENSA_UNDEFINED;
1585     }
1586
1587   if (intisa->num_sysregs != 0)
1588     {
1589       entry.key = name;
1590       result = bsearch (&entry, intisa->sysreg_lookup_table,
1591                         intisa->num_sysregs, sizeof (xtensa_lookup_entry),
1592                         xtensa_isa_name_compare);
1593     }
1594
1595   if (!result)
1596     {
1597       xtisa_errno = xtensa_isa_bad_sysreg;
1598       sprintf (xtisa_error_msg, "sysreg \"%s\" not recognized", name);
1599       return XTENSA_UNDEFINED;
1600     }
1601
1602   return result->u.sysreg;
1603 }
1604
1605
1606 const char *
1607 xtensa_sysreg_name (xtensa_isa isa, xtensa_sysreg sysreg)
1608 {
1609   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1610   CHECK_SYSREG (intisa, sysreg, NULL);
1611   return intisa->sysregs[sysreg].name;
1612 }
1613
1614
1615 int
1616 xtensa_sysreg_number (xtensa_isa isa, xtensa_sysreg sysreg)
1617 {
1618   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1619   CHECK_SYSREG (intisa, sysreg, XTENSA_UNDEFINED);
1620   return intisa->sysregs[sysreg].number;
1621 }
1622
1623
1624 int
1625 xtensa_sysreg_is_user (xtensa_isa isa, xtensa_sysreg sysreg)
1626 {
1627   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1628   CHECK_SYSREG (intisa, sysreg, XTENSA_UNDEFINED);
1629   if (intisa->sysregs[sysreg].is_user)
1630     return 1;
1631   return 0;
1632 }
1633
1634
1635 \f
1636 /* Interfaces.  */
1637
1638
1639 #define CHECK_INTERFACE(INTISA,INTF,ERRVAL) \
1640   do { \
1641     if ((INTF) < 0 || (INTF) >= (INTISA)->num_interfaces) \
1642       { \
1643         xtisa_errno = xtensa_isa_bad_interface; \
1644         strcpy (xtisa_error_msg, "invalid interface specifier"); \
1645         return (ERRVAL); \
1646       } \
1647   } while (0)
1648
1649
1650 xtensa_interface
1651 xtensa_interface_lookup (xtensa_isa isa, const char *ifname)
1652 {
1653   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1654   xtensa_lookup_entry entry, *result = 0;
1655
1656   if (!ifname || !*ifname)
1657     {
1658       xtisa_errno = xtensa_isa_bad_interface;
1659       strcpy (xtisa_error_msg, "invalid interface name");
1660       return XTENSA_UNDEFINED;
1661     }
1662
1663   if (intisa->num_interfaces != 0)
1664     {
1665       entry.key = ifname;
1666       result = bsearch (&entry, intisa->interface_lookup_table,
1667                         intisa->num_interfaces, sizeof (xtensa_lookup_entry),
1668                         xtensa_isa_name_compare);
1669     }
1670
1671   if (!result)
1672     {
1673       xtisa_errno = xtensa_isa_bad_interface;
1674       sprintf (xtisa_error_msg, "interface \"%s\" not recognized", ifname);
1675       return XTENSA_UNDEFINED;
1676     }
1677
1678   return result->u.intf;
1679 }
1680
1681
1682 const char *
1683 xtensa_interface_name (xtensa_isa isa, xtensa_interface intf)
1684 {
1685   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1686   CHECK_INTERFACE (intisa, intf, NULL);
1687   return intisa->interfaces[intf].name;
1688 }
1689
1690
1691 int
1692 xtensa_interface_num_bits (xtensa_isa isa, xtensa_interface intf)
1693 {
1694   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1695   CHECK_INTERFACE (intisa, intf, XTENSA_UNDEFINED);
1696   return intisa->interfaces[intf].num_bits;
1697 }
1698
1699
1700 char
1701 xtensa_interface_inout (xtensa_isa isa, xtensa_interface intf)
1702 {
1703   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1704   CHECK_INTERFACE (intisa, intf, 0);
1705   return intisa->interfaces[intf].inout;
1706 }
1707
1708
1709 int
1710 xtensa_interface_has_side_effect (xtensa_isa isa, xtensa_interface intf)
1711 {
1712   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1713   CHECK_INTERFACE (intisa, intf, XTENSA_UNDEFINED);
1714   if ((intisa->interfaces[intf].flags & XTENSA_INTERFACE_HAS_SIDE_EFFECT) != 0)
1715     return 1;
1716   return 0;
1717 }
1718
1719
1720 int
1721 xtensa_interface_class_id (xtensa_isa isa, xtensa_interface intf)
1722 {
1723   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1724   CHECK_INTERFACE (intisa, intf, XTENSA_UNDEFINED);
1725   return intisa->interfaces[intf].class_id;
1726 }
1727
1728
1729 \f
1730 /* Functional Units.  */
1731
1732
1733 #define CHECK_FUNCUNIT(INTISA,FUN,ERRVAL) \
1734   do { \
1735     if ((FUN) < 0 || (FUN) >= (INTISA)->num_funcUnits) \
1736       { \
1737         xtisa_errno = xtensa_isa_bad_funcUnit; \
1738         strcpy (xtisa_error_msg, "invalid functional unit specifier"); \
1739         return (ERRVAL); \
1740       } \
1741   } while (0)
1742
1743
1744 xtensa_funcUnit
1745 xtensa_funcUnit_lookup (xtensa_isa isa, const char *fname)
1746 {
1747   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1748   xtensa_lookup_entry entry, *result = 0;
1749
1750   if (!fname || !*fname)
1751     {
1752       xtisa_errno = xtensa_isa_bad_funcUnit;
1753       strcpy (xtisa_error_msg, "invalid functional unit name");
1754       return XTENSA_UNDEFINED;
1755     }
1756
1757   if (intisa->num_funcUnits != 0)
1758     {
1759       entry.key = fname;
1760       result = bsearch (&entry, intisa->funcUnit_lookup_table,
1761                         intisa->num_funcUnits, sizeof (xtensa_lookup_entry),
1762                         xtensa_isa_name_compare);
1763     }
1764
1765   if (!result)
1766     {
1767       xtisa_errno = xtensa_isa_bad_funcUnit;
1768       sprintf (xtisa_error_msg,
1769                "functional unit \"%s\" not recognized", fname);
1770       return XTENSA_UNDEFINED;
1771     }
1772
1773   return result->u.fun;
1774 }
1775
1776
1777 const char *
1778 xtensa_funcUnit_name (xtensa_isa isa, xtensa_funcUnit fun)
1779 {
1780   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1781   CHECK_FUNCUNIT (intisa, fun, NULL);
1782   return intisa->funcUnits[fun].name;
1783 }
1784
1785
1786 int
1787 xtensa_funcUnit_num_copies (xtensa_isa isa, xtensa_funcUnit fun)
1788 {
1789   xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
1790   CHECK_FUNCUNIT (intisa, fun, XTENSA_UNDEFINED);
1791   return intisa->funcUnits[fun].num_copies;
1792 }
1793