sim/igen/ld-insn.h

   1 /* The IGEN simulator generator for GDB, the GNU Debugger.
   2
   3    Copyright 2002-2018 Free Software Foundation, Inc.
   4
   5    Contributed by Andrew Cagney.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22
  23
  24 typedef unsigned64 insn_uint;
  25
  26
  27 /* Common among most entries:
  28
  29    All non instruction records have the format:
  30
  31    <...> ::=
  32        ":" <record-name>
  33        ":" <filter-flags>
  34        ":" <filter-models>
  35        ":" ...
  36
  37  */
  38
  39 enum
  40 {
  41   record_type_field = 1,
  42   old_record_type_field = 2,
  43   record_filter_flags_field = 2,
  44   record_filter_models_field = 3,
  45 };
  46
  47
  48 /* Include:
  49
  50    Include the specified file.
  51
  52    <include> ::=
  53        ":" "include"
  54        ":" <filter-flags>
  55        ":" <filter-models>
  56        ":" <filename>
  57        <nl>
  58        ;
  59
  60    */
  61
  62 enum
  63 {
  64   include_filename_field = 4,
  65   nr_include_fields,
  66 };
  67
  68
  69
  70 /* Options:
  71
  72    Valid options are: hi-bit-nr (default 0), insn-bit-size (default
  73    32), insn-specifying-widths (default true), multi-sim (default false).
  74
  75    <option> ::=
  76        ":" "option"
  77        ":" <filter-flags>
  78        ":" <filter-models>
  79        ":" <option-name>
  80        ":" <option-value>
  81        <nl>
  82        ;
  83
  84    <option-name> ::=
  85        "insn-bit-size"
  86        | "insn-specifying-widths"
  87        | "hi-bit-nr"
  88        | "flags-filter"
  89        | "model-filter"
  90        | "multi-sim"
  91        | "format-names"
  92        ;
  93
  94    <option-value> ::=
  95        "true"
  96        | "false"
  97        | <integer>
  98        | <list>
  99        ;
 100
 101
 102    These update the global options structure. */
 103
 104
 105 enum
 106 {
 107   option_name_field = 4,
 108   option_value_field,
 109   nr_option_fields,
 110 };
 111
 112
 113
 114 /* Macro definitions:
 115
 116    <insn-macro> ::=
 117        ":" "define"
 118        ":" <filter-flags>
 119        ":" <filter-models>
 120        ":" <name>
 121        ":" <arg-list>
 122        ":" <expression>
 123        <nl>
 124        ;
 125
 126    <arg-list> ::=
 127        [ <name> { "," <arg-list> } ]
 128        ;
 129
 130    */
 131
 132
 133 enum
 134 {
 135   macro_name_field = 4,
 136   macro_args_field,
 137   macro_expr_field,
 138   nr_macro_fields,
 139 };
 140
 141
 142
 143 /* Functions and internal routins:
 144
 145    NB: <filter-models> and <function-models> are equivalent.
 146
 147
 148    <function> ::=
 149        ":" "function"
 150        <function-spec>
 151        ;
 152
 153    <internal> ::=
 154        ":" "internal"
 155        <function-spec>
 156        ;
 157
 158    <format> ::=
 159        ":" ( "%s" | ... )
 160        <function-spec>
 161        ;
 162
 163    <function-model> ::=
 164        "*" [ <processor-list> ]
 165        ":"
 166        <nl>
 167        ;
 168
 169    <function-spec> ::=
 170        ":" <filter-flags>
 171        ":" <filter-models>
 172        ":" <typedef>
 173        ":" <name>
 174        [ ":" <parameter-list> ]
 175        <nl>
 176        [ <function-model> ]
 177        <code-block>
 178        ;
 179
 180    */
 181
 182 enum
 183 {
 184   function_typedef_field = 4,
 185   function_name_field,
 186   function_param_field,
 187   nr_function_fields,
 188 };
 189
 190 enum
 191 {
 192   function_model_name_field = 0,
 193   nr_function_model_fields = 1,
 194 };
 195
 196 enum
 197 {
 198   old_function_typedef_field = 0,
 199   old_function_type_field = 2,
 200   old_function_name_field = 4,
 201   old_function_param_field = 5,
 202   nr_old_function_fields = 5,   /* parameter-list is optional */
 203 };
 204
 205
 206 typedef struct _function_entry function_entry;
 207 struct _function_entry
 208 {
 209   line_ref *line;
 210   filter *flags;
 211   filter *models;
 212   char *type;
 213   char *name;
 214   char *param;
 215   table_entry *code;
 216   int is_internal;
 217   function_entry *next;
 218 };
 219
 220
 221 typedef void function_entry_handler
 222   (lf *file, function_entry * function, void *data);
 223
 224 extern void function_entry_traverse
 225   (lf *file,
 226    function_entry * functions, function_entry_handler * handler, void *data);
 227
 228
 229 /* cache-macro:
 230
 231    <cache-macro> ::=
 232        ":" <macro-type>
 233        ":" <filter-flags>
 234        ":" <filter-models>
 235        ":" <typedef>
 236        ":" <name>
 237        ":" <field-name> { "," <field-name> }
 238        ":" <expression>
 239        <nl>
 240        ;
 241
 242    <cache-macro-type> ::=
 243        "scratch"
 244        | "cache"
 245        | "compute"
 246        ;
 247
 248    <name> ::=
 249        <ident>
 250        | <ident> "_is_" <integer>
 251        ;
 252
 253    A cache entry is defined (for an instruction) when all
 254    <field-name>s are present as named opcode fields within the
 255    instructions format.
 256
 257    SCRATCH and CACHE macros are defined during the cache fill stage
 258    while CACHE and COMPUTE macros are defined during the instruction
 259    execution stage.
 260
 261    */
 262
 263 enum
 264 {
 265   cache_typedef_field = 4,
 266   cache_name_field,
 267   cache_original_fields_field,
 268   cache_expression_field,
 269   nr_cache_fields,
 270 };
 271
 272 typedef enum
 273 {
 274   scratch_value,
 275   cache_value,
 276   compute_value,
 277 }
 278 cache_entry_type;
 279
 280 typedef struct _cache_entry cache_entry;
 281 struct _cache_entry
 282 {
 283   line_ref *line;
 284   filter *flags;
 285   filter *models;
 286   cache_entry_type entry_type;
 287   char *name;
 288   filter *original_fields;
 289   char *type;
 290   char *expression;
 291   cache_entry *next;
 292 };
 293
 294
 295
 296 /* Model specs:
 297
 298    <model-processor> ::=
 299        ":" "model"
 300        ":" <filter-flags>
 301        ":" <filter-models>
 302        ":" <processor>
 303        ":" <BFD-processor>
 304        ":" <function-unit-data>
 305        <nl>
 306        ;
 307
 308    <model-macro> ::=
 309        ":" "model-macro"
 310        ":" <filter-flags>
 311        ":" <filter-models>
 312        <nl>
 313        <code-block>
 314        ;
 315
 316    <model-data> ::=
 317        ":" "model-data"
 318        ":" <filter-flags>
 319        ":" <filter-models>
 320        <nl>
 321        <code-block>
 322        ;
 323
 324    <model-static> ::=
 325        ":" "model-static"
 326        <function-spec>
 327        ;
 328
 329    <model-internal> ::=
 330        ":" "model-internal"
 331        <function-spec>
 332        ;
 333
 334    <model-function> ::=
 335        ":" "model-internal"
 336        <function-spec>
 337        ;
 338
 339  */
 340
 341 enum
 342 {
 343   nr_model_macro_fields = 4,
 344   nr_model_data_fields = 4,
 345   nr_model_static_fields = nr_function_fields,
 346   nr_model_internal_fields = nr_function_fields,
 347   nr_model_function_fields = nr_function_fields,
 348 };
 349
 350 typedef struct _model_data model_data;
 351 struct _model_data
 352 {
 353   line_ref *line;
 354   filter *flags;
 355   table_entry *entry;
 356   table_entry *code;
 357   model_data *next;
 358 };
 359
 360 enum
 361 {
 362   model_name_field = 4,
 363   model_full_name_field,
 364   model_unit_data_field,
 365   nr_model_processor_fields,
 366 };
 367
 368 typedef struct _model_entry model_entry;
 369 struct _model_entry
 370 {
 371   line_ref *line;
 372   filter *flags;
 373   char *name;
 374   char *full_name;
 375   char *unit_data;
 376   model_entry *next;
 377 };
 378
 379
 380 typedef struct _model_table model_table;
 381 struct _model_table
 382 {
 383   filter *processors;
 384   int nr_models;
 385   model_entry *models;
 386   model_data *macros;
 387   model_data *data;
 388   function_entry *statics;
 389   function_entry *internals;
 390   function_entry *functions;
 391 };
 392
 393
 394
 395 /* Instruction format:
 396
 397    An instruction is composed of a sequence of N bit instruction
 398    words.  Each word broken into a number of instruction fields.
 399    Those fields being constant (ex. an opcode) or variable (register
 400    spec).
 401
 402    <insn-word> ::=
 403        <insn-field> { "," <insn-field> } ;
 404
 405    <insn-field> ::=
 406        ( <binary-value-implying-width>
 407        | <field-name-implying-width>
 408        | [ <start-or-width> "." ] <field>
 409        )
 410        { [ "!" | "=" ] [ <value> | <field-name> ] }
 411        ;
 412
 413    <field> ::=
 414          { "*" }+
 415        | { "/" }+
 416        | <field-name>
 417        | "0x" <hex-value>
 418        | "0b" <binary-value>
 419        | "0" <octal-value>
 420        | <integer-value> ;
 421
 422 */
 423
 424 typedef enum _insn_field_cond_type
 425 {
 426   insn_field_cond_value,
 427   insn_field_cond_field,
 428 }
 429 insn_field_cond_type;
 430 typedef enum _insn_field_cond_test
 431 {
 432   insn_field_cond_eq,
 433   insn_field_cond_ne,
 434 }
 435 insn_field_cond_test;
 436 typedef struct _insn_field_cond insn_field_cond;
 437 struct _insn_field_cond
 438 {
 439   insn_field_cond_type type;
 440   insn_field_cond_test test;
 441   insn_uint value;
 442   struct _insn_field_entry *field;
 443   char *string;
 444   insn_field_cond *next;
 445 };
 446
 447
 448 typedef enum _insn_field_type
 449 {
 450   insn_field_invalid,
 451   insn_field_int,
 452   insn_field_reserved,
 453   insn_field_wild,
 454   insn_field_string,
 455 }
 456 insn_field_type;
 457
 458 typedef struct _insn_field_entry insn_field_entry;
 459 struct _insn_field_entry
 460 {
 461   int first;
 462   int last;
 463   int width;
 464   int word_nr;
 465   insn_field_type type;
 466   insn_uint val_int;
 467   char *pos_string;
 468   char *val_string;
 469   insn_field_cond *conditions;
 470   insn_field_entry *next;
 471   insn_field_entry *prev;
 472 };
 473
 474 typedef struct _insn_bit_entry insn_bit_entry;
 475 struct _insn_bit_entry
 476 {
 477   int value;
 478   int mask;
 479   insn_field_entry *field;
 480 };
 481
 482
 483
 484
 485 typedef struct _insn_entry insn_entry;  /* forward */
 486
 487 typedef struct _insn_word_entry insn_word_entry;
 488 struct _insn_word_entry
 489 {
 490   /* list of sub-fields making up the instruction.  bit provides
 491      faster access to the field data for bit N.  */
 492   insn_field_entry *first;
 493   insn_field_entry *last;
 494   insn_bit_entry *bit[max_insn_bit_size];
 495   /* set of all the string fields */
 496   filter *field_names;
 497   /* For multi-word instructions, The Nth word (from zero). */
 498   insn_word_entry *next;
 499 };
 500
 501
 502
 503 /* Instruction model:
 504
 505    Provides scheduling and other data for the code modeling the
 506    instruction unit.
 507
 508    <insn-model> ::=
 509        "*" [ <processor-list> ]
 510        ":" [ <function-unit-data> ]
 511        <nl>
 512        ;
 513
 514    <processor-list> ::=
 515        <processor> { "," <processor>" }
 516        ;
 517
 518    If the <processor-list> is empty, the model is made the default for
 519    this instruction.
 520
 521    */
 522
 523 enum
 524 {
 525   insn_model_name_field = 0,
 526   insn_model_unit_data_field = 1,
 527   nr_insn_model_fields = 1,
 528 };
 529
 530 typedef struct _insn_model_entry insn_model_entry;
 531 struct _insn_model_entry
 532 {
 533   line_ref *line;
 534   insn_entry *insn;
 535   filter *names;
 536   char *full_name;
 537   char *unit_data;
 538   insn_model_entry *next;
 539 };
 540
 541
 542
 543 /* Instruction mnemonic:
 544
 545    List of assembler mnemonics for the instruction.
 546
 547    <insn-mnenonic> ::=
 548        "\"" <assembler-mnemonic> "\""
 549        [ ":" <conditional-expression> ]
 550        <nl>
 551        ;
 552
 553    An assembler mnemonic string has the syntax:
 554
 555    <assembler-mnemonic>  ::=
 556        ( [ "%" <format-spec> ] "<" <func> [ "#" <param-list> ] ">"
 557        | "%%"
 558        | <other-letter>
 559        )+
 560
 561     Where, for instance, the text is translated into a printf format
 562     and argument pair:
 563
 564        "<FUNC>"         : "%ld", (long) FUNC
 565        "%<FUNC>..."     : "%...", FUNC
 566        "%s<FUNC>"       : "%s", <%s>FUNC (SD_, FUNC)
 567        "%s<FUNC#P1,P2>" : "%s", <%s>FUNC (SD_, P1,P2)
 568        "%lx<FUNC>"      : "%lx", (unsigned long) FUNC
 569        "%08lx<FUNC>"    : "%08lx", (unsigned long) FUNC
 570
 571     And "<%s>FUNC" denotes a function declared using the "%s" record
 572     specifier.
 573
 574
 575
 576        ;
 577
 578    */
 579
 580 enum
 581 {
 582   insn_mnemonic_format_field = 0,
 583   insn_mnemonic_condition_field = 1,
 584   nr_insn_mnemonic_fields = 1,
 585 };
 586
 587 typedef struct _insn_mnemonic_entry insn_mnemonic_entry;
 588 struct _insn_mnemonic_entry
 589 {
 590   line_ref *line;
 591   insn_entry *insn;
 592   char *format;
 593   char *condition;
 594   insn_mnemonic_entry *next;
 595 };
 596
 597
 598
 599 /* Instruction:
 600
 601    <insn> ::=
 602        <insn-word> { "+" <insn-word> }
 603        ":" <format-name>
 604        ":" <filter-flags>
 605        ":" <options>
 606        ":" <name>
 607        <nl>
 608        { <insn-model> }
 609        { <insn-mnemonic> }
 610        <code-block>
 611
 612  */
 613
 614 enum
 615 {
 616   insn_word_field = 0,
 617   insn_format_name_field = 1,
 618   insn_filter_flags_field = 2,
 619   insn_options_field = 3,
 620   insn_name_field = 4,
 621   nr_insn_fields = 5,
 622 };
 623
 624
 625 /* typedef struct _insn_entry insn_entry; */
 626 struct _insn_entry
 627 {
 628   line_ref *line;
 629   filter *flags;                /* filtered by options.filters */
 630   char *format_name;
 631   filter *options;
 632   char *name;
 633   /* the words that make up the instruction. Word provides direct
 634      access to word N. Pseudo instructions can be identified by
 635      nr_words == 0. */
 636   int nr_words;
 637   insn_word_entry *words;
 638   insn_word_entry **word;
 639   /* a set of all the fields from all the words */
 640   filter *field_names;
 641   /* an array of processor models, missing models are NULL! */
 642   int nr_models;
 643   insn_model_entry *models;
 644   insn_model_entry **model;
 645   filter *processors;
 646   /* list of assember formats */
 647   int nr_mnemonics;
 648   insn_mnemonic_entry *mnemonics;
 649   /* code body */
 650   table_entry *code;
 651   insn_entry *next;
 652 };
 653
 654
 655 /* Instruction table:
 656
 657  */
 658
 659 typedef struct _insn_table insn_table;
 660 struct _insn_table
 661 {
 662   cache_entry *caches;
 663   int max_nr_words;
 664   int nr_insns;
 665   insn_entry *insns;
 666   function_entry *functions;
 667   insn_entry *illegal_insn;
 668   model_table *model;
 669   filter *options;
 670   filter *flags;
 671 };
 672
 673 extern insn_table *load_insn_table (char *file_name, cache_entry *cache);
 674
 675 typedef void insn_entry_handler
 676   (lf *file, insn_table *isa, insn_entry * insn, void *data);
 677
 678 extern void insn_table_traverse_insn
 679   (lf *file, insn_table *isa, insn_entry_handler * handler, void *data);
 680
 681
 682
 683 /* Printing */
 684
 685 extern void print_insn_words (lf *file, insn_entry * insn);
 686
 687
 688
 689 /* Debugging */
 690
 691 void
 692   dump_insn_field
 693   (lf *file, char *prefix, insn_field_entry *field, char *suffix);
 694
 695 void
 696   dump_insn_word_entry
 697   (lf *file, char *prefix, insn_word_entry *word, char *suffix);
 698
 699 void
 700   dump_insn_entry (lf *file, char *prefix, insn_entry * insn, char *suffix);
 701
 702 void
 703   dump_cache_entries
 704   (lf *file, char *prefix, cache_entry *entry, char *suffix);
 705
 706 void dump_insn_table (lf *file, char *prefix, insn_table *isa, char *suffix);