src/mesa/program/program_parse.y

   1 %{
   2 /*
   3  * Copyright © 2009 Intel Corporation
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #include <stdarg.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include "main/mtypes.h"
  31 #include "main/imports.h"
  32 #include "program/program.h"
  33 #include "program/prog_parameter.h"
  34 #include "program/prog_parameter_layout.h"
  35 #include "program/prog_statevars.h"
  36 #include "program/prog_instruction.h"
  37
  38 #include "program/symbol_table.h"
  39 #include "program/program_parser.h"
  40
  41 extern void *yy_scan_string(char *);
  42 extern void yy_delete_buffer(void *);
  43
  44 static struct asm_symbol *declare_variable(struct asm_parser_state *state,
  45     char *name, enum asm_type t, struct YYLTYPE *locp);
  46
  47 static int add_state_reference(struct gl_program_parameter_list *param_list,
  48     const gl_state_index tokens[STATE_LENGTH]);
  49
  50 static int initialize_symbol_from_state(struct gl_program *prog,
  51     struct asm_symbol *param_var, const gl_state_index tokens[STATE_LENGTH]);
  52
  53 static int initialize_symbol_from_param(struct gl_program *prog,
  54     struct asm_symbol *param_var, const gl_state_index tokens[STATE_LENGTH]);
  55
  56 static int initialize_symbol_from_const(struct gl_program *prog,
  57     struct asm_symbol *param_var, const struct asm_vector *vec,
  58     GLboolean allowSwizzle);
  59
  60 static int yyparse(struct asm_parser_state *state);
  61
  62 static char *make_error_string(const char *fmt, ...);
  63
  64 static void yyerror(struct YYLTYPE *locp, struct asm_parser_state *state,
  65     const char *s);
  66
  67 static int validate_inputs(struct YYLTYPE *locp,
  68     struct asm_parser_state *state);
  69
  70 static void init_dst_reg(struct prog_dst_register *r);
  71
  72 static void set_dst_reg(struct prog_dst_register *r,
  73                         gl_register_file file, GLint index);
  74
  75 static void init_src_reg(struct asm_src_register *r);
  76
  77 static void set_src_reg(struct asm_src_register *r,
  78                         gl_register_file file, GLint index);
  79
  80 static void set_src_reg_swz(struct asm_src_register *r,
  81                             gl_register_file file, GLint index, GLuint swizzle);
  82
  83 static void asm_instruction_set_operands(struct asm_instruction *inst,
  84     const struct prog_dst_register *dst, const struct asm_src_register *src0,
  85     const struct asm_src_register *src1, const struct asm_src_register *src2);
  86
  87 static struct asm_instruction *asm_instruction_ctor(enum prog_opcode op,
  88     const struct prog_dst_register *dst, const struct asm_src_register *src0,
  89     const struct asm_src_register *src1, const struct asm_src_register *src2);
  90
  91 static struct asm_instruction *asm_instruction_copy_ctor(
  92     const struct prog_instruction *base, const struct prog_dst_register *dst,
  93     const struct asm_src_register *src0, const struct asm_src_register *src1,
  94     const struct asm_src_register *src2);
  95
  96 #ifndef FALSE
  97 #define FALSE 0
  98 #define TRUE (!FALSE)
  99 #endif
 100
 101 #define YYLLOC_DEFAULT(Current, Rhs, N)                                 \
 102    do {                                                                 \
 103       if (N) {                                                  \
 104          (Current).first_line = YYRHSLOC(Rhs, 1).first_line;            \
 105          (Current).first_column = YYRHSLOC(Rhs, 1).first_column;        \
 106          (Current).position = YYRHSLOC(Rhs, 1).position;                \
 107          (Current).last_line = YYRHSLOC(Rhs, N).last_line;              \
 108          (Current).last_column = YYRHSLOC(Rhs, N).last_column;          \
 109       } else {                                                          \
 110          (Current).first_line = YYRHSLOC(Rhs, 0).last_line;             \
 111          (Current).last_line = (Current).first_line;                    \
 112          (Current).first_column = YYRHSLOC(Rhs, 0).last_column;         \
 113          (Current).last_column = (Current).first_column;                \
 114          (Current).position = YYRHSLOC(Rhs, 0).position                 \
 115             + (Current).first_column;                                   \
 116       }                                                                 \
 117    } while(0)
 118 %}
 119
 120 %pure-parser
 121 %locations
 122 %lex-param   { struct asm_parser_state *state }
 123 %parse-param { struct asm_parser_state *state }
 124 %error-verbose
 125
 126 %union {
 127    struct asm_instruction *inst;
 128    struct asm_symbol *sym;
 129    struct asm_symbol temp_sym;
 130    struct asm_swizzle_mask swiz_mask;
 131    struct asm_src_register src_reg;
 132    struct prog_dst_register dst_reg;
 133    struct prog_instruction temp_inst;
 134    char *string;
 135    unsigned result;
 136    unsigned attrib;
 137    int integer;
 138    float real;
 139    gl_state_index state[STATE_LENGTH];
 140    int negate;
 141    struct asm_vector vector;
 142    enum prog_opcode opcode;
 143
 144    struct {
 145       unsigned swz;
 146       unsigned rgba_valid:1;
 147       unsigned xyzw_valid:1;
 148       unsigned negate:1;
 149    } ext_swizzle;
 150 }
 151
 152 %token ARBvp_10 ARBfp_10
 153
 154 /* Tokens for assembler pseudo-ops */
 155 %token <integer> ADDRESS
 156 %token ALIAS ATTRIB
 157 %token OPTION OUTPUT
 158 %token PARAM
 159 %token <integer> TEMP
 160 %token END
 161
 162  /* Tokens for instructions */
 163 %token <temp_inst> BIN_OP BINSC_OP SAMPLE_OP SCALAR_OP TRI_OP VECTOR_OP
 164 %token <temp_inst> ARL KIL SWZ TXD_OP
 165
 166 %token <integer> INTEGER
 167 %token <real> REAL
 168
 169 %token AMBIENT ATTENUATION
 170 %token BACK
 171 %token CLIP COLOR
 172 %token DEPTH DIFFUSE DIRECTION
 173 %token EMISSION ENV EYE
 174 %token FOG FOGCOORD FRAGMENT FRONT
 175 %token HALF
 176 %token INVERSE INVTRANS
 177 %token LIGHT LIGHTMODEL LIGHTPROD LOCAL
 178 %token MATERIAL MAT_PROGRAM MATRIX MATRIXINDEX MODELVIEW MVP
 179 %token NORMAL
 180 %token OBJECT
 181 %token PALETTE PARAMS PLANE POINT_TOK POINTSIZE POSITION PRIMARY PROGRAM PROJECTION
 182 %token RANGE RESULT ROW
 183 %token SCENECOLOR SECONDARY SHININESS SIZE_TOK SPECULAR SPOT STATE
 184 %token TEXCOORD TEXENV TEXGEN TEXGEN_Q TEXGEN_R TEXGEN_S TEXGEN_T TEXTURE TRANSPOSE
 185 %token TEXTURE_UNIT TEX_1D TEX_2D TEX_3D TEX_CUBE TEX_RECT
 186 %token TEX_SHADOW1D TEX_SHADOW2D TEX_SHADOWRECT
 187 %token TEX_ARRAY1D TEX_ARRAY2D TEX_ARRAYSHADOW1D TEX_ARRAYSHADOW2D
 188 %token VERTEX VTXATTRIB
 189 %token WEIGHT
 190
 191 %token <string> IDENTIFIER USED_IDENTIFIER
 192 %type <string> string
 193 %token <swiz_mask> MASK4 MASK3 MASK2 MASK1 SWIZZLE
 194 %token DOT_DOT
 195 %token DOT
 196
 197 %type <inst> instruction ALU_instruction TexInstruction
 198 %type <inst> ARL_instruction VECTORop_instruction
 199 %type <inst> SCALARop_instruction BINSCop_instruction BINop_instruction
 200 %type <inst> TRIop_instruction TXD_instruction SWZ_instruction SAMPLE_instruction
 201 %type <inst> KIL_instruction
 202
 203 %type <dst_reg> dstReg maskedDstReg maskedAddrReg
 204 %type <src_reg> srcReg scalarUse scalarSrcReg swizzleSrcReg
 205 %type <swiz_mask> scalarSuffix swizzleSuffix extendedSwizzle
 206 %type <ext_swizzle> extSwizComp extSwizSel
 207 %type <swiz_mask> optionalMask
 208
 209 %type <sym> progParamArray
 210 %type <integer> addrRegRelOffset addrRegPosOffset addrRegNegOffset
 211 %type <src_reg> progParamArrayMem progParamArrayAbs progParamArrayRel
 212 %type <sym> addrReg
 213 %type <swiz_mask> addrComponent addrWriteMask
 214
 215 %type <result> resultBinding resultColBinding
 216 %type <integer> optFaceType optColorType
 217 %type <integer> optResultFaceType optResultColorType
 218
 219 %type <integer> optTexImageUnitNum texImageUnitNum
 220 %type <integer> optTexCoordUnitNum texCoordUnitNum
 221 %type <integer> optLegacyTexUnitNum legacyTexUnitNum
 222 %type <integer> texImageUnit texTarget
 223 %type <integer> vtxAttribNum
 224
 225 %type <attrib> attribBinding vtxAttribItem fragAttribItem
 226
 227 %type <temp_sym> paramSingleInit paramSingleItemDecl
 228 %type <integer> optArraySize
 229
 230 %type <state> stateSingleItem stateMultipleItem
 231 %type <state> stateMaterialItem
 232 %type <state> stateLightItem stateLightModelItem stateLightProdItem
 233 %type <state> stateTexGenItem stateFogItem stateClipPlaneItem statePointItem
 234 %type <state> stateMatrixItem stateMatrixRow stateMatrixRows
 235 %type <state> stateTexEnvItem stateDepthItem
 236
 237 %type <state> stateLModProperty
 238 %type <state> stateMatrixName optMatrixRows
 239
 240 %type <integer> stateMatProperty
 241 %type <integer> stateLightProperty stateSpotProperty
 242 %type <integer> stateLightNumber stateLProdProperty
 243 %type <integer> stateTexGenType stateTexGenCoord
 244 %type <integer> stateTexEnvProperty
 245 %type <integer> stateFogProperty
 246 %type <integer> stateClipPlaneNum
 247 %type <integer> statePointProperty
 248
 249 %type <integer> stateOptMatModifier stateMatModifier stateMatrixRowNum
 250 %type <integer> stateOptModMatNum stateModMatNum statePaletteMatNum
 251 %type <integer> stateProgramMatNum
 252
 253 %type <integer> ambDiffSpecProperty
 254
 255 %type <state> programSingleItem progEnvParam progLocalParam
 256 %type <state> programMultipleItem progEnvParams progLocalParams
 257
 258 %type <temp_sym> paramMultipleInit paramMultInitList paramMultipleItem
 259 %type <temp_sym> paramSingleItemUse
 260
 261 %type <integer> progEnvParamNum progLocalParamNum
 262 %type <state> progEnvParamNums progLocalParamNums
 263
 264 %type <vector> paramConstDecl paramConstUse
 265 %type <vector> paramConstScalarDecl paramConstScalarUse paramConstVector
 266 %type <real> signedFloatConstant
 267 %type <negate> optionalSign
 268
 269 %{
 270 extern int
 271 _mesa_program_lexer_lex(YYSTYPE *yylval_param, YYLTYPE *yylloc_param,
 272                         void *yyscanner);
 273
 274 static int
 275 yylex(YYSTYPE *yylval_param, YYLTYPE *yylloc_param,
 276       struct asm_parser_state *state)
 277 {
 278    return _mesa_program_lexer_lex(yylval_param, yylloc_param, state->scanner);
 279 }
 280 %}
 281
 282 %%
 283
 284 program: language optionSequence statementSequence END
 285         ;
 286
 287 language: ARBvp_10
 288         {
 289            if (state->prog->Target != GL_VERTEX_PROGRAM_ARB) {
 290               yyerror(& @1, state, "invalid fragment program header");
 291
 292            }
 293            state->mode = ARB_vertex;
 294         }
 295         | ARBfp_10
 296         {
 297            if (state->prog->Target != GL_FRAGMENT_PROGRAM_ARB) {
 298               yyerror(& @1, state, "invalid vertex program header");
 299            }
 300            state->mode = ARB_fragment;
 301
 302            state->option.TexRect =
 303               (state->ctx->Extensions.NV_texture_rectangle != GL_FALSE);
 304         }
 305         ;
 306
 307 optionSequence: optionSequence option
 308         |
 309         ;
 310
 311 option: OPTION string ';'
 312         {
 313            int valid = 0;
 314
 315            if (state->mode == ARB_vertex) {
 316               valid = _mesa_ARBvp_parse_option(state, $2);
 317            } else if (state->mode == ARB_fragment) {
 318               valid = _mesa_ARBfp_parse_option(state, $2);
 319            }
 320
 321
 322            free($2);
 323
 324            if (!valid) {
 325               const char *const err_str = (state->mode == ARB_vertex)
 326                  ? "invalid ARB vertex program option"
 327                  : "invalid ARB fragment program option";
 328
 329               yyerror(& @2, state, err_str);
 330               YYERROR;
 331            }
 332         }
 333         ;
 334
 335 statementSequence: statementSequence statement
 336         |
 337         ;
 338
 339 statement: instruction ';'
 340         {
 341            if ($1 != NULL) {
 342               if (state->inst_tail == NULL) {
 343                  state->inst_head = $1;
 344               } else {
 345                  state->inst_tail->next = $1;
 346               }
 347
 348               state->inst_tail = $1;
 349               $1->next = NULL;
 350
 351               state->prog->NumInstructions++;
 352            }
 353         }
 354         | namingStatement ';'
 355         ;
 356
 357 instruction: ALU_instruction
 358         {
 359            $$ = $1;
 360            state->prog->NumAluInstructions++;
 361         }
 362         | TexInstruction
 363         {
 364            $$ = $1;
 365            state->prog->NumTexInstructions++;
 366         }
 367         ;
 368
 369 ALU_instruction: ARL_instruction
 370         | VECTORop_instruction
 371         | SCALARop_instruction
 372         | BINSCop_instruction
 373         | BINop_instruction
 374         | TRIop_instruction
 375         | SWZ_instruction
 376         ;
 377
 378 TexInstruction: SAMPLE_instruction
 379         | KIL_instruction
 380         | TXD_instruction
 381         ;
 382
 383 ARL_instruction: ARL maskedAddrReg ',' scalarSrcReg
 384         {
 385            $$ = asm_instruction_ctor(OPCODE_ARL, & $2, & $4, NULL, NULL);
 386         }
 387         ;
 388
 389 VECTORop_instruction: VECTOR_OP maskedDstReg ',' swizzleSrcReg
 390         {
 391            if ($1.Opcode == OPCODE_DDY)
 392               state->fragment.UsesDFdy = 1;
 393            $$ = asm_instruction_copy_ctor(& $1, & $2, & $4, NULL, NULL);
 394         }
 395         ;
 396
 397 SCALARop_instruction: SCALAR_OP maskedDstReg ',' scalarSrcReg
 398         {
 399            $$ = asm_instruction_copy_ctor(& $1, & $2, & $4, NULL, NULL);
 400         }
 401         ;
 402
 403 BINSCop_instruction: BINSC_OP maskedDstReg ',' scalarSrcReg ',' scalarSrcReg
 404         {
 405            $$ = asm_instruction_copy_ctor(& $1, & $2, & $4, & $6, NULL);
 406         }
 407         ;
 408
 409
 410 BINop_instruction: BIN_OP maskedDstReg ',' swizzleSrcReg ',' swizzleSrcReg
 411         {
 412            $$ = asm_instruction_copy_ctor(& $1, & $2, & $4, & $6, NULL);
 413         }
 414         ;
 415
 416 TRIop_instruction: TRI_OP maskedDstReg ','
 417                    swizzleSrcReg ',' swizzleSrcReg ',' swizzleSrcReg
 418         {
 419            $$ = asm_instruction_copy_ctor(& $1, & $2, & $4, & $6, & $8);
 420         }
 421         ;
 422
 423 SAMPLE_instruction: SAMPLE_OP maskedDstReg ',' swizzleSrcReg ',' texImageUnit ',' texTarget
 424         {
 425            $$ = asm_instruction_copy_ctor(& $1, & $2, & $4, NULL, NULL);
 426            if ($$ != NULL) {
 427               const GLbitfield tex_mask = (1U << $6);
 428               GLbitfield shadow_tex = 0;
 429               GLbitfield target_mask = 0;
 430
 431
 432               $$->Base.TexSrcUnit = $6;
 433
 434               if ($8 < 0) {
 435                  shadow_tex = tex_mask;
 436
 437                  $$->Base.TexSrcTarget = -$8;
 438                  $$->Base.TexShadow = 1;
 439               } else {
 440                  $$->Base.TexSrcTarget = $8;
 441               }
 442
 443               target_mask = (1U << $$->Base.TexSrcTarget);
 444
 445               /* If this texture unit was previously accessed and that access
 446                * had a different texture target, generate an error.
 447                *
 448                * If this texture unit was previously accessed and that access
 449                * had a different shadow mode, generate an error.
 450                */
 451               if ((state->prog->TexturesUsed[$6] != 0)
 452                   && ((state->prog->TexturesUsed[$6] != target_mask)
 453                       || ((state->prog->ShadowSamplers & tex_mask)
 454                           != shadow_tex))) {
 455                  yyerror(& @8, state,
 456                          "multiple targets used on one texture image unit");
 457                  YYERROR;
 458               }
 459
 460
 461               state->prog->TexturesUsed[$6] |= target_mask;
 462               state->prog->ShadowSamplers |= shadow_tex;
 463            }
 464         }
 465         ;
 466
 467 KIL_instruction: KIL swizzleSrcReg
 468         {
 469            $$ = asm_instruction_ctor(OPCODE_KIL, NULL, & $2, NULL, NULL);
 470            state->fragment.UsesKill = 1;
 471         }
 472         ;
 473
 474 TXD_instruction: TXD_OP maskedDstReg ',' swizzleSrcReg ',' swizzleSrcReg ',' swizzleSrcReg ',' texImageUnit ',' texTarget
 475         {
 476            $$ = asm_instruction_copy_ctor(& $1, & $2, & $4, & $6, & $8);
 477            if ($$ != NULL) {
 478               const GLbitfield tex_mask = (1U << $10);
 479               GLbitfield shadow_tex = 0;
 480               GLbitfield target_mask = 0;
 481
 482
 483               $$->Base.TexSrcUnit = $10;
 484
 485               if ($12 < 0) {
 486                  shadow_tex = tex_mask;
 487
 488                  $$->Base.TexSrcTarget = -$12;
 489                  $$->Base.TexShadow = 1;
 490               } else {
 491                  $$->Base.TexSrcTarget = $12;
 492               }
 493
 494               target_mask = (1U << $$->Base.TexSrcTarget);
 495
 496               /* If this texture unit was previously accessed and that access
 497                * had a different texture target, generate an error.
 498                *
 499                * If this texture unit was previously accessed and that access
 500                * had a different shadow mode, generate an error.
 501                */
 502               if ((state->prog->TexturesUsed[$10] != 0)
 503                   && ((state->prog->TexturesUsed[$10] != target_mask)
 504                       || ((state->prog->ShadowSamplers & tex_mask)
 505                           != shadow_tex))) {
 506                  yyerror(& @12, state,
 507                          "multiple targets used on one texture image unit");
 508                  YYERROR;
 509               }
 510
 511
 512               state->prog->TexturesUsed[$10] |= target_mask;
 513               state->prog->ShadowSamplers |= shadow_tex;
 514            }
 515         }
 516         ;
 517
 518 texImageUnit: TEXTURE_UNIT optTexImageUnitNum
 519         {
 520            $$ = $2;
 521         }
 522         ;
 523
 524 texTarget: TEX_1D  { $$ = TEXTURE_1D_INDEX; }
 525         | TEX_2D   { $$ = TEXTURE_2D_INDEX; }
 526         | TEX_3D   { $$ = TEXTURE_3D_INDEX; }
 527         | TEX_CUBE { $$ = TEXTURE_CUBE_INDEX; }
 528         | TEX_RECT { $$ = TEXTURE_RECT_INDEX; }
 529         | TEX_SHADOW1D   { $$ = -TEXTURE_1D_INDEX; }
 530         | TEX_SHADOW2D   { $$ = -TEXTURE_2D_INDEX; }
 531         | TEX_SHADOWRECT { $$ = -TEXTURE_RECT_INDEX; }
 532         | TEX_ARRAY1D         { $$ = TEXTURE_1D_ARRAY_INDEX; }
 533         | TEX_ARRAY2D         { $$ = TEXTURE_2D_ARRAY_INDEX; }
 534         | TEX_ARRAYSHADOW1D   { $$ = -TEXTURE_1D_ARRAY_INDEX; }
 535         | TEX_ARRAYSHADOW2D   { $$ = -TEXTURE_2D_ARRAY_INDEX; }
 536         ;
 537
 538 SWZ_instruction: SWZ maskedDstReg ',' srcReg ',' extendedSwizzle
 539         {
 540            /* FIXME: Is this correct?  Should the extenedSwizzle be applied
 541             * FIXME: to the existing swizzle?
 542             */
 543            $4.Base.Swizzle = $6.swizzle;
 544            $4.Base.Negate = $6.mask;
 545
 546            $$ = asm_instruction_copy_ctor(& $1, & $2, & $4, NULL, NULL);
 547         }
 548         ;
 549
 550 scalarSrcReg: optionalSign scalarUse
 551         {
 552            $$ = $2;
 553
 554            if ($1) {
 555               $$.Base.Negate = ~$$.Base.Negate;
 556            }
 557         }
 558         ;
 559
 560 scalarUse:  srcReg scalarSuffix
 561         {
 562            $$ = $1;
 563
 564            $$.Base.Swizzle = _mesa_combine_swizzles($$.Base.Swizzle,
 565                                                     $2.swizzle);
 566         }
 567         | paramConstScalarUse
 568         {
 569            struct asm_symbol temp_sym;
 570
 571            if (!state->option.NV_fragment) {
 572               yyerror(& @1, state, "expected scalar suffix");
 573               YYERROR;
 574            }
 575
 576            memset(& temp_sym, 0, sizeof(temp_sym));
 577            temp_sym.param_binding_begin = ~0;
 578            initialize_symbol_from_const(state->prog, & temp_sym, & $1, GL_TRUE);
 579
 580            set_src_reg_swz(& $$, PROGRAM_CONSTANT,
 581                            temp_sym.param_binding_begin,
 582                            temp_sym.param_binding_swizzle);
 583         }
 584         ;
 585
 586 swizzleSrcReg: optionalSign srcReg swizzleSuffix
 587         {
 588            $$ = $2;
 589
 590            if ($1) {
 591               $$.Base.Negate = ~$$.Base.Negate;
 592            }
 593
 594            $$.Base.Swizzle = _mesa_combine_swizzles($$.Base.Swizzle,
 595                                                     $3.swizzle);
 596         }
 597         ;
 598
 599 maskedDstReg: dstReg optionalMask
 600         {
 601            $$ = $1;
 602            $$.WriteMask = $2.mask;
 603
 604            if ($$.File == PROGRAM_OUTPUT) {
 605               /* Technically speaking, this should check that it is in
 606                * vertex program mode.  However, PositionInvariant can never be
 607                * set in fragment program mode, so it is somewhat irrelevant.
 608                */
 609               if (state->option.PositionInvariant
 610                && ($$.Index == VARYING_SLOT_POS)) {
 611                  yyerror(& @1, state, "position-invariant programs cannot "
 612                          "write position");
 613                  YYERROR;
 614               }
 615
 616               state->prog->OutputsWritten |= BITFIELD64_BIT($$.Index);
 617            }
 618         }
 619         ;
 620
 621 maskedAddrReg: addrReg addrWriteMask
 622         {
 623            set_dst_reg(& $$, PROGRAM_ADDRESS, 0);
 624            $$.WriteMask = $2.mask;
 625         }
 626         ;
 627
 628 extendedSwizzle: extSwizComp ',' extSwizComp ',' extSwizComp ',' extSwizComp
 629         {
 630            const unsigned xyzw_valid =
 631               ($1.xyzw_valid << 0)
 632               | ($3.xyzw_valid << 1)
 633               | ($5.xyzw_valid << 2)
 634               | ($7.xyzw_valid << 3);
 635            const unsigned rgba_valid =
 636               ($1.rgba_valid << 0)
 637               | ($3.rgba_valid << 1)
 638               | ($5.rgba_valid << 2)
 639               | ($7.rgba_valid << 3);
 640
 641            /* All of the swizzle components have to be valid in either RGBA
 642             * or XYZW.  Note that 0 and 1 are valid in both, so both masks
 643             * can have some bits set.
 644             *
 645             * We somewhat deviate from the spec here.  It would be really hard
 646             * to figure out which component is the error, and there probably
 647             * isn't a lot of benefit.
 648             */
 649            if ((rgba_valid != 0x0f) && (xyzw_valid != 0x0f)) {
 650               yyerror(& @1, state, "cannot combine RGBA and XYZW swizzle "
 651                       "components");
 652               YYERROR;
 653            }
 654
 655            $$.swizzle = MAKE_SWIZZLE4($1.swz, $3.swz, $5.swz, $7.swz);
 656            $$.mask = ($1.negate) | ($3.negate << 1) | ($5.negate << 2)
 657               | ($7.negate << 3);
 658         }
 659         ;
 660
 661 extSwizComp: optionalSign extSwizSel
 662         {
 663            $$ = $2;
 664            $$.negate = ($1) ? 1 : 0;
 665         }
 666         ;
 667
 668 extSwizSel: INTEGER
 669         {
 670            if (($1 != 0) && ($1 != 1)) {
 671               yyerror(& @1, state, "invalid extended swizzle selector");
 672               YYERROR;
 673            }
 674
 675            $$.swz = ($1 == 0) ? SWIZZLE_ZERO : SWIZZLE_ONE;
 676            $$.negate = 0;
 677
 678            /* 0 and 1 are valid for both RGBA swizzle names and XYZW
 679             * swizzle names.
 680             */
 681            $$.xyzw_valid = 1;
 682            $$.rgba_valid = 1;
 683         }
 684         | string
 685         {
 686            char s;
 687
 688            if (strlen($1) > 1) {
 689               yyerror(& @1, state, "invalid extended swizzle selector");
 690               YYERROR;
 691            }
 692
 693            s = $1[0];
 694            free($1);
 695
 696            $$.rgba_valid = 0;
 697            $$.xyzw_valid = 0;
 698            $$.negate = 0;
 699
 700            switch (s) {
 701            case 'x':
 702               $$.swz = SWIZZLE_X;
 703               $$.xyzw_valid = 1;
 704               break;
 705            case 'y':
 706               $$.swz = SWIZZLE_Y;
 707               $$.xyzw_valid = 1;
 708               break;
 709            case 'z':
 710               $$.swz = SWIZZLE_Z;
 711               $$.xyzw_valid = 1;
 712               break;
 713            case 'w':
 714               $$.swz = SWIZZLE_W;
 715               $$.xyzw_valid = 1;
 716               break;
 717
 718            case 'r':
 719               $$.swz = SWIZZLE_X;
 720               $$.rgba_valid = 1;
 721               break;
 722            case 'g':
 723               $$.swz = SWIZZLE_Y;
 724               $$.rgba_valid = 1;
 725               break;
 726            case 'b':
 727               $$.swz = SWIZZLE_Z;
 728               $$.rgba_valid = 1;
 729               break;
 730            case 'a':
 731               $$.swz = SWIZZLE_W;
 732               $$.rgba_valid = 1;
 733               break;
 734
 735            default:
 736               yyerror(& @1, state, "invalid extended swizzle selector");
 737               YYERROR;
 738               break;
 739            }
 740         }
 741         ;
 742
 743 srcReg: USED_IDENTIFIER /* temporaryReg | progParamSingle */
 744         {
 745            struct asm_symbol *const s = (struct asm_symbol *)
 746               _mesa_symbol_table_find_symbol(state->st, 0, $1);
 747
 748            free($1);
 749
 750            if (s == NULL) {
 751               yyerror(& @1, state, "invalid operand variable");
 752               YYERROR;
 753            } else if ((s->type != at_param) && (s->type != at_temp)
 754                       && (s->type != at_attrib)) {
 755               yyerror(& @1, state, "invalid operand variable");
 756               YYERROR;
 757            } else if ((s->type == at_param) && s->param_is_array) {
 758               yyerror(& @1, state, "non-array access to array PARAM");
 759               YYERROR;
 760            }
 761
 762            init_src_reg(& $$);
 763            switch (s->type) {
 764            case at_temp:
 765               set_src_reg(& $$, PROGRAM_TEMPORARY, s->temp_binding);
 766               break;
 767            case at_param:
 768               set_src_reg_swz(& $$, s->param_binding_type,
 769                               s->param_binding_begin,
 770                               s->param_binding_swizzle);
 771               break;
 772            case at_attrib:
 773               set_src_reg(& $$, PROGRAM_INPUT, s->attrib_binding);
 774               state->prog->InputsRead |= BITFIELD64_BIT($$.Base.Index);
 775
 776               if (!validate_inputs(& @1, state)) {
 777                  YYERROR;
 778               }
 779               break;
 780
 781            default:
 782               YYERROR;
 783               break;
 784            }
 785         }
 786         | attribBinding
 787         {
 788            set_src_reg(& $$, PROGRAM_INPUT, $1);
 789            state->prog->InputsRead |= BITFIELD64_BIT($$.Base.Index);
 790
 791            if (!validate_inputs(& @1, state)) {
 792               YYERROR;
 793            }
 794         }
 795         | progParamArray '[' progParamArrayMem ']'
 796         {
 797            if (! $3.Base.RelAddr
 798                && ((unsigned) $3.Base.Index >= $1->param_binding_length)) {
 799               yyerror(& @3, state, "out of bounds array access");
 800               YYERROR;
 801            }
 802
 803            init_src_reg(& $$);
 804            $$.Base.File = $1->param_binding_type;
 805
 806            if ($3.Base.RelAddr) {
 807               state->prog->IndirectRegisterFiles |= (1 << $$.Base.File);
 808               $1->param_accessed_indirectly = 1;
 809
 810               $$.Base.RelAddr = 1;
 811               $$.Base.Index = $3.Base.Index;
 812               $$.Symbol = $1;
 813            } else {
 814               $$.Base.Index = $1->param_binding_begin + $3.Base.Index;
 815            }
 816         }
 817         | paramSingleItemUse
 818         {
 819            gl_register_file file = ($1.name != NULL)
 820               ? $1.param_binding_type
 821               : PROGRAM_CONSTANT;
 822            set_src_reg_swz(& $$, file, $1.param_binding_begin,
 823                            $1.param_binding_swizzle);
 824         }
 825         ;
 826
 827 dstReg: resultBinding
 828         {
 829            set_dst_reg(& $$, PROGRAM_OUTPUT, $1);
 830         }
 831         | USED_IDENTIFIER /* temporaryReg | vertexResultReg */
 832         {
 833            struct asm_symbol *const s = (struct asm_symbol *)
 834               _mesa_symbol_table_find_symbol(state->st, 0, $1);
 835
 836            free($1);
 837
 838            if (s == NULL) {
 839               yyerror(& @1, state, "invalid operand variable");
 840               YYERROR;
 841            } else if ((s->type != at_output) && (s->type != at_temp)) {
 842               yyerror(& @1, state, "invalid operand variable");
 843               YYERROR;
 844            }
 845
 846            switch (s->type) {
 847            case at_temp:
 848               set_dst_reg(& $$, PROGRAM_TEMPORARY, s->temp_binding);
 849               break;
 850            case at_output:
 851               set_dst_reg(& $$, PROGRAM_OUTPUT, s->output_binding);
 852               break;
 853            default:
 854               set_dst_reg(& $$, s->param_binding_type, s->param_binding_begin);
 855               break;
 856            }
 857         }
 858         ;
 859
 860 progParamArray: USED_IDENTIFIER
 861         {
 862            struct asm_symbol *const s = (struct asm_symbol *)
 863               _mesa_symbol_table_find_symbol(state->st, 0, $1);
 864
 865            free($1);
 866
 867            if (s == NULL) {
 868               yyerror(& @1, state, "invalid operand variable");
 869               YYERROR;
 870            } else if ((s->type != at_param) || !s->param_is_array) {
 871               yyerror(& @1, state, "array access to non-PARAM variable");
 872               YYERROR;
 873            } else {
 874               $$ = s;
 875            }
 876         }
 877         ;
 878
 879 progParamArrayMem: progParamArrayAbs | progParamArrayRel;
 880
 881 progParamArrayAbs: INTEGER
 882         {
 883            init_src_reg(& $$);
 884            $$.Base.Index = $1;
 885         }
 886         ;
 887
 888 progParamArrayRel: addrReg addrComponent addrRegRelOffset
 889         {
 890            /* FINISHME: Add support for multiple address registers.
 891             */
 892            /* FINISHME: Add support for 4-component address registers.
 893             */
 894            init_src_reg(& $$);
 895            $$.Base.RelAddr = 1;
 896            $$.Base.Index = $3;
 897         }
 898         ;
 899
 900 addrRegRelOffset:              { $$ = 0; }
 901         | '+' addrRegPosOffset { $$ = $2; }
 902         | '-' addrRegNegOffset { $$ = -$2; }
 903         ;
 904
 905 addrRegPosOffset: INTEGER
 906         {
 907            if (($1 < 0) || ($1 > (state->limits->MaxAddressOffset - 1))) {
 908               char s[100];
 909               _mesa_snprintf(s, sizeof(s),
 910                              "relative address offset too large (%d)", $1);
 911               yyerror(& @1, state, s);
 912               YYERROR;
 913            } else {
 914               $$ = $1;
 915            }
 916         }
 917         ;
 918
 919 addrRegNegOffset: INTEGER
 920         {
 921            if (($1 < 0) || ($1 > state->limits->MaxAddressOffset)) {
 922               char s[100];
 923               _mesa_snprintf(s, sizeof(s),
 924                              "relative address offset too large (%d)", $1);
 925               yyerror(& @1, state, s);
 926               YYERROR;
 927            } else {
 928               $$ = $1;
 929            }
 930         }
 931         ;
 932
 933 addrReg: USED_IDENTIFIER
 934         {
 935            struct asm_symbol *const s = (struct asm_symbol *)
 936               _mesa_symbol_table_find_symbol(state->st, 0, $1);
 937
 938            free($1);
 939
 940            if (s == NULL) {
 941               yyerror(& @1, state, "invalid array member");
 942               YYERROR;
 943            } else if (s->type != at_address) {
 944               yyerror(& @1, state,
 945                       "invalid variable for indexed array access");
 946               YYERROR;
 947            } else {
 948               $$ = s;
 949            }
 950         }
 951         ;
 952
 953 addrComponent: MASK1
 954         {
 955            if ($1.mask != WRITEMASK_X) {
 956               yyerror(& @1, state, "invalid address component selector");
 957               YYERROR;
 958            } else {
 959               $$ = $1;
 960            }
 961         }
 962         ;
 963
 964 addrWriteMask: MASK1
 965         {
 966            if ($1.mask != WRITEMASK_X) {
 967               yyerror(& @1, state,
 968                       "address register write mask must be \".x\"");
 969               YYERROR;
 970            } else {
 971               $$ = $1;
 972            }
 973         }
 974         ;
 975
 976 scalarSuffix: MASK1;
 977
 978 swizzleSuffix: MASK1
 979         | MASK4
 980         | SWIZZLE
 981         |              { $$.swizzle = SWIZZLE_NOOP; $$.mask = WRITEMASK_XYZW; }
 982         ;
 983
 984 optionalMask: MASK4 | MASK3 | MASK2 | MASK1
 985         |              { $$.swizzle = SWIZZLE_NOOP; $$.mask = WRITEMASK_XYZW; }
 986         ;
 987
 988 namingStatement: ATTRIB_statement
 989         | PARAM_statement
 990         | TEMP_statement
 991         | ADDRESS_statement
 992         | OUTPUT_statement
 993         | ALIAS_statement
 994         ;
 995
 996 ATTRIB_statement: ATTRIB IDENTIFIER '=' attribBinding
 997         {
 998            struct asm_symbol *const s =
 999               declare_variable(state, $2, at_attrib, & @2);
1000
1001            if (s == NULL) {
1002               free($2);
1003               YYERROR;
1004            } else {
1005               s->attrib_binding = $4;
1006               state->InputsBound |= BITFIELD64_BIT(s->attrib_binding);
1007
1008               if (!validate_inputs(& @4, state)) {
1009                  YYERROR;
1010               }
1011            }
1012         }
1013         ;
1014
1015 attribBinding: VERTEX vtxAttribItem
1016         {
1017            $$ = $2;
1018         }
1019         | FRAGMENT fragAttribItem
1020         {
1021            $$ = $2;
1022         }
1023         ;
1024
1025 vtxAttribItem: POSITION
1026         {
1027            $$ = VERT_ATTRIB_POS;
1028         }
1029         | WEIGHT vtxOptWeightNum
1030         {
1031            $$ = VERT_ATTRIB_WEIGHT;
1032         }
1033         | NORMAL
1034         {
1035            $$ = VERT_ATTRIB_NORMAL;
1036         }
1037         | COLOR optColorType
1038         {
1039            $$ = VERT_ATTRIB_COLOR0 + $2;
1040         }
1041         | FOGCOORD
1042         {
1043            $$ = VERT_ATTRIB_FOG;
1044         }
1045         | TEXCOORD optTexCoordUnitNum
1046         {
1047            $$ = VERT_ATTRIB_TEX0 + $2;
1048         }
1049         | MATRIXINDEX '[' vtxWeightNum ']'
1050         {
1051            yyerror(& @1, state, "GL_ARB_matrix_palette not supported");
1052            YYERROR;
1053         }
1054         | VTXATTRIB '[' vtxAttribNum ']'
1055         {
1056            $$ = VERT_ATTRIB_GENERIC0 + $3;
1057         }
1058         ;
1059
1060 vtxAttribNum: INTEGER
1061         {
1062            if ((unsigned) $1 >= state->limits->MaxAttribs) {
1063               yyerror(& @1, state, "invalid vertex attribute reference");
1064               YYERROR;
1065            }
1066
1067            $$ = $1;
1068         }
1069         ;
1070
1071 vtxOptWeightNum:  | '[' vtxWeightNum ']';
1072 vtxWeightNum: INTEGER;
1073
1074 fragAttribItem: POSITION
1075         {
1076            $$ = VARYING_SLOT_POS;
1077         }
1078         | COLOR optColorType
1079         {
1080            $$ = VARYING_SLOT_COL0 + $2;
1081         }
1082         | FOGCOORD
1083         {
1084            $$ = VARYING_SLOT_FOGC;
1085         }
1086         | TEXCOORD optTexCoordUnitNum
1087         {
1088            $$ = VARYING_SLOT_TEX0 + $2;
1089         }
1090         ;
1091
1092 PARAM_statement: PARAM_singleStmt | PARAM_multipleStmt;
1093
1094 PARAM_singleStmt: PARAM IDENTIFIER paramSingleInit
1095         {
1096            struct asm_symbol *const s =
1097               declare_variable(state, $2, at_param, & @2);
1098
1099            if (s == NULL) {
1100               free($2);
1101               YYERROR;
1102            } else {
1103               s->param_binding_type = $3.param_binding_type;
1104               s->param_binding_begin = $3.param_binding_begin;
1105               s->param_binding_length = $3.param_binding_length;
1106               s->param_binding_swizzle = $3.param_binding_swizzle;
1107               s->param_is_array = 0;
1108            }
1109         }
1110         ;
1111
1112 PARAM_multipleStmt: PARAM IDENTIFIER '[' optArraySize ']' paramMultipleInit
1113         {
1114            if (($4 != 0) && ((unsigned) $4 != $6.param_binding_length)) {
1115               free($2);
1116               yyerror(& @4, state,
1117                       "parameter array size and number of bindings must match");
1118               YYERROR;
1119            } else {
1120               struct asm_symbol *const s =
1121                  declare_variable(state, $2, $6.type, & @2);
1122
1123               if (s == NULL) {
1124                  free($2);
1125                  YYERROR;
1126               } else {
1127                  s->param_binding_type = $6.param_binding_type;
1128                  s->param_binding_begin = $6.param_binding_begin;
1129                  s->param_binding_length = $6.param_binding_length;
1130                  s->param_binding_swizzle = SWIZZLE_XYZW;
1131                  s->param_is_array = 1;
1132               }
1133            }
1134         }
1135         ;
1136
1137 optArraySize:
1138         {
1139            $$ = 0;
1140         }
1141         | INTEGER
1142         {
1143            if (($1 < 1) || ((unsigned) $1 > state->limits->MaxParameters)) {
1144               char msg[100];
1145               _mesa_snprintf(msg, sizeof(msg),
1146                              "invalid parameter array size (size=%d max=%u)",
1147                              $1, state->limits->MaxParameters);
1148               yyerror(& @1, state, msg);
1149               YYERROR;
1150            } else {
1151               $$ = $1;
1152            }
1153         }
1154         ;
1155
1156 paramSingleInit: '=' paramSingleItemDecl
1157         {
1158            $$ = $2;
1159         }
1160         ;
1161
1162 paramMultipleInit: '=' '{' paramMultInitList '}'
1163         {
1164            $$ = $3;
1165         }
1166         ;
1167
1168 paramMultInitList: paramMultipleItem
1169         | paramMultInitList ',' paramMultipleItem
1170         {
1171            $1.param_binding_length += $3.param_binding_length;
1172            $$ = $1;
1173         }
1174         ;
1175
1176 paramSingleItemDecl: stateSingleItem
1177         {
1178            memset(& $$, 0, sizeof($$));
1179            $$.param_binding_begin = ~0;
1180            initialize_symbol_from_state(state->prog, & $$, $1);
1181         }
1182         | programSingleItem
1183         {
1184            memset(& $$, 0, sizeof($$));
1185            $$.param_binding_begin = ~0;
1186            initialize_symbol_from_param(state->prog, & $$, $1);
1187         }
1188         | paramConstDecl
1189         {
1190            memset(& $$, 0, sizeof($$));
1191            $$.param_binding_begin = ~0;
1192            initialize_symbol_from_const(state->prog, & $$, & $1, GL_TRUE);
1193         }
1194         ;
1195
1196 paramSingleItemUse: stateSingleItem
1197         {
1198            memset(& $$, 0, sizeof($$));
1199            $$.param_binding_begin = ~0;
1200            initialize_symbol_from_state(state->prog, & $$, $1);
1201         }
1202         | programSingleItem
1203         {
1204            memset(& $$, 0, sizeof($$));
1205            $$.param_binding_begin = ~0;
1206            initialize_symbol_from_param(state->prog, & $$, $1);
1207         }
1208         | paramConstUse
1209         {
1210            memset(& $$, 0, sizeof($$));
1211            $$.param_binding_begin = ~0;
1212            initialize_symbol_from_const(state->prog, & $$, & $1, GL_TRUE);
1213         }
1214         ;
1215
1216 paramMultipleItem: stateMultipleItem
1217         {
1218            memset(& $$, 0, sizeof($$));
1219            $$.param_binding_begin = ~0;
1220            initialize_symbol_from_state(state->prog, & $$, $1);
1221         }
1222         | programMultipleItem
1223         {
1224            memset(& $$, 0, sizeof($$));
1225            $$.param_binding_begin = ~0;
1226            initialize_symbol_from_param(state->prog, & $$, $1);
1227         }
1228         | paramConstDecl
1229         {
1230            memset(& $$, 0, sizeof($$));
1231            $$.param_binding_begin = ~0;
1232            initialize_symbol_from_const(state->prog, & $$, & $1, GL_FALSE);
1233         }
1234         ;
1235
1236 stateMultipleItem: stateSingleItem        { memcpy($$, $1, sizeof($$)); }
1237         | STATE stateMatrixRows           { memcpy($$, $2, sizeof($$)); }
1238         ;
1239
1240 stateSingleItem: STATE stateMaterialItem  { memcpy($$, $2, sizeof($$)); }
1241         | STATE stateLightItem            { memcpy($$, $2, sizeof($$)); }
1242         | STATE stateLightModelItem       { memcpy($$, $2, sizeof($$)); }
1243         | STATE stateLightProdItem        { memcpy($$, $2, sizeof($$)); }
1244         | STATE stateTexGenItem           { memcpy($$, $2, sizeof($$)); }
1245         | STATE stateTexEnvItem           { memcpy($$, $2, sizeof($$)); }
1246         | STATE stateFogItem              { memcpy($$, $2, sizeof($$)); }
1247         | STATE stateClipPlaneItem        { memcpy($$, $2, sizeof($$)); }
1248         | STATE statePointItem            { memcpy($$, $2, sizeof($$)); }
1249         | STATE stateMatrixRow            { memcpy($$, $2, sizeof($$)); }
1250         | STATE stateDepthItem            { memcpy($$, $2, sizeof($$)); }
1251         ;
1252
1253 stateMaterialItem: MATERIAL optFaceType stateMatProperty
1254         {
1255            memset($$, 0, sizeof($$));
1256            $$[0] = STATE_MATERIAL;
1257            $$[1] = $2;
1258            $$[2] = $3;
1259         }
1260         ;
1261
1262 stateMatProperty: ambDiffSpecProperty
1263         {
1264            $$ = $1;
1265         }
1266         | EMISSION
1267         {
1268            $$ = STATE_EMISSION;
1269         }
1270         | SHININESS
1271         {
1272            $$ = STATE_SHININESS;
1273         }
1274         ;
1275
1276 stateLightItem: LIGHT '[' stateLightNumber ']' stateLightProperty
1277         {
1278            memset($$, 0, sizeof($$));
1279            $$[0] = STATE_LIGHT;
1280            $$[1] = $3;
1281            $$[2] = $5;
1282         }
1283         ;
1284
1285 stateLightProperty: ambDiffSpecProperty
1286         {
1287            $$ = $1;
1288         }
1289         | POSITION
1290         {
1291            $$ = STATE_POSITION;
1292         }
1293         | ATTENUATION
1294         {
1295            if (!state->ctx->Extensions.EXT_point_parameters) {
1296               yyerror(& @1, state, "GL_ARB_point_parameters not supported");
1297               YYERROR;
1298            }
1299
1300            $$ = STATE_ATTENUATION;
1301         }
1302         | SPOT stateSpotProperty
1303         {
1304            $$ = $2;
1305         }
1306         | HALF
1307         {
1308            $$ = STATE_HALF_VECTOR;
1309         }
1310         ;
1311
1312 stateSpotProperty: DIRECTION
1313         {
1314            $$ = STATE_SPOT_DIRECTION;
1315         }
1316         ;
1317
1318 stateLightModelItem: LIGHTMODEL stateLModProperty
1319         {
1320            $$[0] = $2[0];
1321            $$[1] = $2[1];
1322         }
1323         ;
1324
1325 stateLModProperty: AMBIENT
1326         {
1327            memset($$, 0, sizeof($$));
1328            $$[0] = STATE_LIGHTMODEL_AMBIENT;
1329         }
1330         | optFaceType SCENECOLOR
1331         {
1332            memset($$, 0, sizeof($$));
1333            $$[0] = STATE_LIGHTMODEL_SCENECOLOR;
1334            $$[1] = $1;
1335         }
1336         ;
1337
1338 stateLightProdItem: LIGHTPROD '[' stateLightNumber ']' optFaceType stateLProdProperty
1339         {
1340            memset($$, 0, sizeof($$));
1341            $$[0] = STATE_LIGHTPROD;
1342            $$[1] = $3;
1343            $$[2] = $5;
1344            $$[3] = $6;
1345         }
1346         ;
1347
1348 stateLProdProperty: ambDiffSpecProperty;
1349
1350 stateTexEnvItem: TEXENV optLegacyTexUnitNum stateTexEnvProperty
1351         {
1352            memset($$, 0, sizeof($$));
1353            $$[0] = $3;
1354            $$[1] = $2;
1355         }
1356         ;
1357
1358 stateTexEnvProperty: COLOR
1359         {
1360            $$ = STATE_TEXENV_COLOR;
1361         }
1362         ;
1363
1364 ambDiffSpecProperty: AMBIENT
1365         {
1366            $$ = STATE_AMBIENT;
1367         }
1368         | DIFFUSE
1369         {
1370            $$ = STATE_DIFFUSE;
1371         }
1372         | SPECULAR
1373         {
1374            $$ = STATE_SPECULAR;
1375         }
1376         ;
1377
1378 stateLightNumber: INTEGER
1379         {
1380            if ((unsigned) $1 >= state->MaxLights) {
1381               yyerror(& @1, state, "invalid light selector");
1382               YYERROR;
1383            }
1384
1385            $$ = $1;
1386         }
1387         ;
1388
1389 stateTexGenItem: TEXGEN optTexCoordUnitNum stateTexGenType stateTexGenCoord
1390         {
1391            memset($$, 0, sizeof($$));
1392            $$[0] = STATE_TEXGEN;
1393            $$[1] = $2;
1394            $$[2] = $3 + $4;
1395         }
1396         ;
1397
1398 stateTexGenType: EYE
1399         {
1400            $$ = STATE_TEXGEN_EYE_S;
1401         }
1402         | OBJECT
1403         {
1404            $$ = STATE_TEXGEN_OBJECT_S;
1405         }
1406         ;
1407 stateTexGenCoord: TEXGEN_S
1408         {
1409            $$ = STATE_TEXGEN_EYE_S - STATE_TEXGEN_EYE_S;
1410         }
1411         | TEXGEN_T
1412         {
1413            $$ = STATE_TEXGEN_EYE_T - STATE_TEXGEN_EYE_S;
1414         }
1415         | TEXGEN_R
1416         {
1417            $$ = STATE_TEXGEN_EYE_R - STATE_TEXGEN_EYE_S;
1418         }
1419         | TEXGEN_Q
1420         {
1421            $$ = STATE_TEXGEN_EYE_Q - STATE_TEXGEN_EYE_S;
1422         }
1423         ;
1424
1425 stateFogItem: FOG stateFogProperty
1426         {
1427            memset($$, 0, sizeof($$));
1428            $$[0] = $2;
1429         }
1430         ;
1431
1432 stateFogProperty: COLOR
1433         {
1434            $$ = STATE_FOG_COLOR;
1435         }
1436         | PARAMS
1437         {
1438            $$ = STATE_FOG_PARAMS;
1439         }
1440         ;
1441
1442 stateClipPlaneItem: CLIP '[' stateClipPlaneNum ']' PLANE
1443         {
1444            memset($$, 0, sizeof($$));
1445            $$[0] = STATE_CLIPPLANE;
1446            $$[1] = $3;
1447         }
1448         ;
1449
1450 stateClipPlaneNum: INTEGER
1451         {
1452            if ((unsigned) $1 >= state->MaxClipPlanes) {
1453               yyerror(& @1, state, "invalid clip plane selector");
1454               YYERROR;
1455            }
1456
1457            $$ = $1;
1458         }
1459         ;
1460
1461 statePointItem: POINT_TOK statePointProperty
1462         {
1463            memset($$, 0, sizeof($$));
1464            $$[0] = $2;
1465         }
1466         ;
1467
1468 statePointProperty: SIZE_TOK
1469         {
1470            $$ = STATE_POINT_SIZE;
1471         }
1472         | ATTENUATION
1473         {
1474            $$ = STATE_POINT_ATTENUATION;
1475         }
1476         ;
1477
1478 stateMatrixRow: stateMatrixItem ROW '[' stateMatrixRowNum ']'
1479         {
1480            $$[0] = $1[0];
1481            $$[1] = $1[1];
1482            $$[2] = $4;
1483            $$[3] = $4;
1484            $$[4] = $1[2];
1485         }
1486         ;
1487
1488 stateMatrixRows: stateMatrixItem optMatrixRows
1489         {
1490            $$[0] = $1[0];
1491            $$[1] = $1[1];
1492            $$[2] = $2[2];
1493            $$[3] = $2[3];
1494            $$[4] = $1[2];
1495         }
1496         ;
1497
1498 optMatrixRows:
1499         {
1500            $$[2] = 0;
1501            $$[3] = 3;
1502         }
1503         | ROW '[' stateMatrixRowNum DOT_DOT stateMatrixRowNum ']'
1504         {
1505            /* It seems logical that the matrix row range specifier would have
1506             * to specify a range or more than one row (i.e., $5 > $3).
1507             * However, the ARB_vertex_program spec says "a program will fail
1508             * to load if <a> is greater than <b>."  This means that $3 == $5
1509             * is valid.
1510             */
1511            if ($3 > $5) {
1512               yyerror(& @3, state, "invalid matrix row range");
1513               YYERROR;
1514            }
1515
1516            $$[2] = $3;
1517            $$[3] = $5;
1518         }
1519         ;
1520
1521 stateMatrixItem: MATRIX stateMatrixName stateOptMatModifier
1522         {
1523            $$[0] = $2[0];
1524            $$[1] = $2[1];
1525            $$[2] = $3;
1526         }
1527         ;
1528
1529 stateOptMatModifier:
1530         {
1531            $$ = 0;
1532         }
1533         | stateMatModifier
1534         {
1535            $$ = $1;
1536         }
1537         ;
1538
1539 stateMatModifier: INVERSE
1540         {
1541            $$ = STATE_MATRIX_INVERSE;
1542         }
1543         | TRANSPOSE
1544         {
1545            $$ = STATE_MATRIX_TRANSPOSE;
1546         }
1547         | INVTRANS
1548         {
1549            $$ = STATE_MATRIX_INVTRANS;
1550         }
1551         ;
1552
1553 stateMatrixRowNum: INTEGER
1554         {
1555            if ($1 > 3) {
1556               yyerror(& @1, state, "invalid matrix row reference");
1557               YYERROR;
1558            }
1559
1560            $$ = $1;
1561         }
1562         ;
1563
1564 stateMatrixName: MODELVIEW stateOptModMatNum
1565         {
1566            $$[0] = STATE_MODELVIEW_MATRIX;
1567            $$[1] = $2;
1568         }
1569         | PROJECTION
1570         {
1571            $$[0] = STATE_PROJECTION_MATRIX;
1572            $$[1] = 0;
1573         }
1574         | MVP
1575         {
1576            $$[0] = STATE_MVP_MATRIX;
1577            $$[1] = 0;
1578         }
1579         | TEXTURE optTexCoordUnitNum
1580         {
1581            $$[0] = STATE_TEXTURE_MATRIX;
1582            $$[1] = $2;
1583         }
1584         | PALETTE '[' statePaletteMatNum ']'
1585         {
1586            yyerror(& @1, state, "GL_ARB_matrix_palette not supported");
1587            YYERROR;
1588         }
1589         | MAT_PROGRAM '[' stateProgramMatNum ']'
1590         {
1591            $$[0] = STATE_PROGRAM_MATRIX;
1592            $$[1] = $3;
1593         }
1594         ;
1595
1596 stateOptModMatNum:
1597         {
1598            $$ = 0;
1599         }
1600         | '[' stateModMatNum ']'
1601         {
1602            $$ = $2;
1603         }
1604         ;
1605 stateModMatNum: INTEGER
1606         {
1607            /* Since GL_ARB_vertex_blend isn't supported, only modelview matrix
1608             * zero is valid.
1609             */
1610            if ($1 != 0) {
1611               yyerror(& @1, state, "invalid modelview matrix index");
1612               YYERROR;
1613            }
1614
1615            $$ = $1;
1616         }
1617         ;
1618 statePaletteMatNum: INTEGER
1619         {
1620            /* Since GL_ARB_matrix_palette isn't supported, just let any value
1621             * through here.  The error will be generated later.
1622             */
1623            $$ = $1;
1624         }
1625         ;
1626 stateProgramMatNum: INTEGER
1627         {
1628            if ((unsigned) $1 >= state->MaxProgramMatrices) {
1629               yyerror(& @1, state, "invalid program matrix selector");
1630               YYERROR;
1631            }
1632
1633            $$ = $1;
1634         }
1635         ;
1636
1637 stateDepthItem: DEPTH RANGE
1638         {
1639            memset($$, 0, sizeof($$));
1640            $$[0] = STATE_DEPTH_RANGE;
1641         }
1642         ;
1643
1644
1645 programSingleItem: progEnvParam | progLocalParam;
1646
1647 programMultipleItem: progEnvParams | progLocalParams;
1648
1649 progEnvParams: PROGRAM ENV '[' progEnvParamNums ']'
1650         {
1651            memset($$, 0, sizeof($$));
1652            $$[0] = state->state_param_enum;
1653            $$[1] = STATE_ENV;
1654            $$[2] = $4[0];
1655            $$[3] = $4[1];
1656         }
1657         ;
1658
1659 progEnvParamNums: progEnvParamNum
1660         {
1661            $$[0] = $1;
1662            $$[1] = $1;
1663         }
1664         | progEnvParamNum DOT_DOT progEnvParamNum
1665         {
1666            $$[0] = $1;
1667            $$[1] = $3;
1668         }
1669         ;
1670
1671 progEnvParam: PROGRAM ENV '[' progEnvParamNum ']'
1672         {
1673            memset($$, 0, sizeof($$));
1674            $$[0] = state->state_param_enum;
1675            $$[1] = STATE_ENV;
1676            $$[2] = $4;
1677            $$[3] = $4;
1678         }
1679         ;
1680
1681 progLocalParams: PROGRAM LOCAL '[' progLocalParamNums ']'
1682         {
1683            memset($$, 0, sizeof($$));
1684            $$[0] = state->state_param_enum;
1685            $$[1] = STATE_LOCAL;
1686            $$[2] = $4[0];
1687            $$[3] = $4[1];
1688         }
1689
1690 progLocalParamNums: progLocalParamNum
1691         {
1692            $$[0] = $1;
1693            $$[1] = $1;
1694         }
1695         | progLocalParamNum DOT_DOT progLocalParamNum
1696         {
1697            $$[0] = $1;
1698            $$[1] = $3;
1699         }
1700         ;
1701
1702 progLocalParam: PROGRAM LOCAL '[' progLocalParamNum ']'
1703         {
1704            memset($$, 0, sizeof($$));
1705            $$[0] = state->state_param_enum;
1706            $$[1] = STATE_LOCAL;
1707            $$[2] = $4;
1708            $$[3] = $4;
1709         }
1710         ;
1711
1712 progEnvParamNum: INTEGER
1713         {
1714            if ((unsigned) $1 >= state->limits->MaxEnvParams) {
1715               yyerror(& @1, state, "invalid environment parameter reference");
1716               YYERROR;
1717            }
1718            $$ = $1;
1719         }
1720         ;
1721
1722 progLocalParamNum: INTEGER
1723         {
1724            if ((unsigned) $1 >= state->limits->MaxLocalParams) {
1725               yyerror(& @1, state, "invalid local parameter reference");
1726               YYERROR;
1727            }
1728            $$ = $1;
1729         }
1730         ;
1731
1732
1733
1734 paramConstDecl: paramConstScalarDecl | paramConstVector;
1735 paramConstUse: paramConstScalarUse | paramConstVector;
1736
1737 paramConstScalarDecl: signedFloatConstant
1738         {
1739            $$.count = 4;
1740            $$.data[0].f = $1;
1741            $$.data[1].f = $1;
1742            $$.data[2].f = $1;
1743            $$.data[3].f = $1;
1744         }
1745         ;
1746
1747 paramConstScalarUse: REAL
1748         {
1749            $$.count = 1;
1750            $$.data[0].f = $1;
1751            $$.data[1].f = $1;
1752            $$.data[2].f = $1;
1753            $$.data[3].f = $1;
1754         }
1755         | INTEGER
1756         {
1757            $$.count = 1;
1758            $$.data[0].f = (float) $1;
1759            $$.data[1].f = (float) $1;
1760            $$.data[2].f = (float) $1;
1761            $$.data[3].f = (float) $1;
1762         }
1763         ;
1764
1765 paramConstVector: '{' signedFloatConstant '}'
1766         {
1767            $$.count = 4;
1768            $$.data[0].f = $2;
1769            $$.data[1].f = 0.0f;
1770            $$.data[2].f = 0.0f;
1771            $$.data[3].f = 1.0f;
1772         }
1773         | '{' signedFloatConstant ',' signedFloatConstant '}'
1774         {
1775            $$.count = 4;
1776            $$.data[0].f = $2;
1777            $$.data[1].f = $4;
1778            $$.data[2].f = 0.0f;
1779            $$.data[3].f = 1.0f;
1780         }
1781         | '{' signedFloatConstant ',' signedFloatConstant ','
1782               signedFloatConstant '}'
1783         {
1784            $$.count = 4;
1785            $$.data[0].f = $2;
1786            $$.data[1].f = $4;
1787            $$.data[2].f = $6;
1788            $$.data[3].f = 1.0f;
1789         }
1790         | '{' signedFloatConstant ',' signedFloatConstant ','
1791               signedFloatConstant ',' signedFloatConstant '}'
1792         {
1793            $$.count = 4;
1794            $$.data[0].f = $2;
1795            $$.data[1].f = $4;
1796            $$.data[2].f = $6;
1797            $$.data[3].f = $8;
1798         }
1799         ;
1800
1801 signedFloatConstant: optionalSign REAL
1802         {
1803            $$ = ($1) ? -$2 : $2;
1804         }
1805         | optionalSign INTEGER
1806         {
1807            $$ = (float)(($1) ? -$2 : $2);
1808         }
1809         ;
1810
1811 optionalSign: '+'        { $$ = FALSE; }
1812         | '-'            { $$ = TRUE;  }
1813         |                { $$ = FALSE; }
1814         ;
1815
1816 TEMP_statement: TEMP { $<integer>$ = $1; } varNameList
1817         ;
1818
1819 ADDRESS_statement: ADDRESS { $<integer>$ = $1; } varNameList
1820         ;
1821
1822 varNameList: varNameList ',' IDENTIFIER
1823         {
1824            if (!declare_variable(state, $3, $<integer>0, & @3)) {
1825               free($3);
1826               YYERROR;
1827            }
1828         }
1829         | IDENTIFIER
1830         {
1831            if (!declare_variable(state, $1, $<integer>0, & @1)) {
1832               free($1);
1833               YYERROR;
1834            }
1835         }
1836         ;
1837
1838 OUTPUT_statement: OUTPUT IDENTIFIER '=' resultBinding
1839         {
1840            struct asm_symbol *const s =
1841               declare_variable(state, $2, at_output, & @2);
1842
1843            if (s == NULL) {
1844               free($2);
1845               YYERROR;
1846            } else {
1847               s->output_binding = $4;
1848            }
1849         }
1850         ;
1851
1852 resultBinding: RESULT POSITION
1853         {
1854            if (state->mode == ARB_vertex) {
1855               $$ = VARYING_SLOT_POS;
1856            } else {
1857               yyerror(& @2, state, "invalid program result name");
1858               YYERROR;
1859            }
1860         }
1861         | RESULT FOGCOORD
1862         {
1863            if (state->mode == ARB_vertex) {
1864               $$ = VARYING_SLOT_FOGC;
1865            } else {
1866               yyerror(& @2, state, "invalid program result name");
1867               YYERROR;
1868            }
1869         }
1870         | RESULT resultColBinding
1871         {
1872            $$ = $2;
1873         }
1874         | RESULT POINTSIZE
1875         {
1876            if (state->mode == ARB_vertex) {
1877               $$ = VARYING_SLOT_PSIZ;
1878            } else {
1879               yyerror(& @2, state, "invalid program result name");
1880               YYERROR;
1881            }
1882         }
1883         | RESULT TEXCOORD optTexCoordUnitNum
1884         {
1885            if (state->mode == ARB_vertex) {
1886               $$ = VARYING_SLOT_TEX0 + $3;
1887            } else {
1888               yyerror(& @2, state, "invalid program result name");
1889               YYERROR;
1890            }
1891         }
1892         | RESULT DEPTH
1893         {
1894            if (state->mode == ARB_fragment) {
1895               $$ = FRAG_RESULT_DEPTH;
1896            } else {
1897               yyerror(& @2, state, "invalid program result name");
1898               YYERROR;
1899            }
1900         }
1901         ;
1902
1903 resultColBinding: COLOR optResultFaceType optResultColorType
1904         {
1905            $$ = $2 + $3;
1906         }
1907         ;
1908
1909 optResultFaceType:
1910         {
1911            if (state->mode == ARB_vertex) {
1912               $$ = VARYING_SLOT_COL0;
1913            } else {
1914               if (state->option.DrawBuffers)
1915                  $$ = FRAG_RESULT_DATA0;
1916               else
1917                  $$ = FRAG_RESULT_COLOR;
1918            }
1919         }
1920         | '[' INTEGER ']'
1921         {
1922            if (state->mode == ARB_vertex) {
1923               yyerror(& @1, state, "invalid program result name");
1924               YYERROR;
1925            } else {
1926               if (!state->option.DrawBuffers) {
1927                  /* From the ARB_draw_buffers spec (same text exists
1928                   * for ATI_draw_buffers):
1929                   *
1930                   *     If this option is not specified, a fragment
1931                   *     program that attempts to bind
1932                   *     "result.color[n]" will fail to load, and only
1933                   *     "result.color" will be allowed.
1934                   */
1935                  yyerror(& @1, state,
1936                          "result.color[] used without "
1937                          "`OPTION ARB_draw_buffers' or "
1938                          "`OPTION ATI_draw_buffers'");
1939                  YYERROR;
1940               } else if ($2 >= state->MaxDrawBuffers) {
1941                  yyerror(& @1, state,
1942                          "result.color[] exceeds MAX_DRAW_BUFFERS_ARB");
1943                  YYERROR;
1944               }
1945               $$ = FRAG_RESULT_DATA0 + $2;
1946            }
1947         }
1948         | FRONT
1949         {
1950            if (state->mode == ARB_vertex) {
1951               $$ = VARYING_SLOT_COL0;
1952            } else {
1953               yyerror(& @1, state, "invalid program result name");
1954               YYERROR;
1955            }
1956         }
1957         | BACK
1958         {
1959            if (state->mode == ARB_vertex) {
1960               $$ = VARYING_SLOT_BFC0;
1961            } else {
1962               yyerror(& @1, state, "invalid program result name");
1963               YYERROR;
1964            }
1965         }
1966         ;
1967
1968 optResultColorType:
1969         {
1970            $$ = 0;
1971         }
1972         | PRIMARY
1973         {
1974            if (state->mode == ARB_vertex) {
1975               $$ = 0;
1976            } else {
1977               yyerror(& @1, state, "invalid program result name");
1978               YYERROR;
1979            }
1980         }
1981         | SECONDARY
1982         {
1983            if (state->mode == ARB_vertex) {
1984               $$ = 1;
1985            } else {
1986               yyerror(& @1, state, "invalid program result name");
1987               YYERROR;
1988            }
1989         }
1990         ;
1991
1992 optFaceType:    { $$ = 0; }
1993         | FRONT { $$ = 0; }
1994         | BACK  { $$ = 1; }
1995         ;
1996
1997 optColorType:       { $$ = 0; }
1998         | PRIMARY   { $$ = 0; }
1999         | SECONDARY { $$ = 1; }
2000         ;
2001
2002 optTexCoordUnitNum:                { $$ = 0; }
2003         | '[' texCoordUnitNum ']'  { $$ = $2; }
2004         ;
2005
2006 optTexImageUnitNum:                { $$ = 0; }
2007         | '[' texImageUnitNum ']'  { $$ = $2; }
2008         ;
2009
2010 optLegacyTexUnitNum:               { $$ = 0; }
2011         | '[' legacyTexUnitNum ']' { $$ = $2; }
2012         ;
2013
2014 texCoordUnitNum: INTEGER
2015         {
2016            if ((unsigned) $1 >= state->MaxTextureCoordUnits) {
2017               yyerror(& @1, state, "invalid texture coordinate unit selector");
2018               YYERROR;
2019            }
2020
2021            $$ = $1;
2022         }
2023         ;
2024
2025 texImageUnitNum: INTEGER
2026         {
2027            if ((unsigned) $1 >= state->MaxTextureImageUnits) {
2028               yyerror(& @1, state, "invalid texture image unit selector");
2029               YYERROR;
2030            }
2031
2032            $$ = $1;
2033         }
2034         ;
2035
2036 legacyTexUnitNum: INTEGER
2037         {
2038            if ((unsigned) $1 >= state->MaxTextureUnits) {
2039               yyerror(& @1, state, "invalid texture unit selector");
2040               YYERROR;
2041            }
2042
2043            $$ = $1;
2044         }
2045         ;
2046
2047 ALIAS_statement: ALIAS IDENTIFIER '=' USED_IDENTIFIER
2048         {
2049            struct asm_symbol *exist = (struct asm_symbol *)
2050               _mesa_symbol_table_find_symbol(state->st, 0, $2);
2051            struct asm_symbol *target = (struct asm_symbol *)
2052               _mesa_symbol_table_find_symbol(state->st, 0, $4);
2053
2054            free($4);
2055
2056            if (exist != NULL) {
2057               char m[1000];
2058               _mesa_snprintf(m, sizeof(m), "redeclared identifier: %s", $2);
2059               free($2);
2060               yyerror(& @2, state, m);
2061               YYERROR;
2062            } else if (target == NULL) {
2063               free($2);
2064               yyerror(& @4, state,
2065                       "undefined variable binding in ALIAS statement");
2066               YYERROR;
2067            } else {
2068               _mesa_symbol_table_add_symbol(state->st, 0, $2, target);
2069            }
2070         }
2071         ;
2072
2073 string: IDENTIFIER
2074         | USED_IDENTIFIER
2075         ;
2076
2077 %%
2078
2079 void
2080 asm_instruction_set_operands(struct asm_instruction *inst,
2081                              const struct prog_dst_register *dst,
2082                              const struct asm_src_register *src0,
2083                              const struct asm_src_register *src1,
2084                              const struct asm_src_register *src2)
2085 {
2086    /* In the core ARB extensions only the KIL instruction doesn't have a
2087     * destination register.
2088     */
2089    if (dst == NULL) {
2090       init_dst_reg(& inst->Base.DstReg);
2091    } else {
2092       inst->Base.DstReg = *dst;
2093    }
2094
2095    if (src0 != NULL) {
2096       inst->Base.SrcReg[0] = src0->Base;
2097       inst->SrcReg[0] = *src0;
2098    } else {
2099       init_src_reg(& inst->SrcReg[0]);
2100    }
2101
2102    if (src1 != NULL) {
2103       inst->Base.SrcReg[1] = src1->Base;
2104       inst->SrcReg[1] = *src1;
2105    } else {
2106       init_src_reg(& inst->SrcReg[1]);
2107    }
2108
2109    if (src2 != NULL) {
2110       inst->Base.SrcReg[2] = src2->Base;
2111       inst->SrcReg[2] = *src2;
2112    } else {
2113       init_src_reg(& inst->SrcReg[2]);
2114    }
2115 }
2116
2117
2118 struct asm_instruction *
2119 asm_instruction_ctor(enum prog_opcode op,
2120                      const struct prog_dst_register *dst,
2121                      const struct asm_src_register *src0,
2122                      const struct asm_src_register *src1,
2123                      const struct asm_src_register *src2)
2124 {
2125    struct asm_instruction *inst = CALLOC_STRUCT(asm_instruction);
2126
2127    if (inst) {
2128       _mesa_init_instructions(& inst->Base, 1);
2129       inst->Base.Opcode = op;
2130
2131       asm_instruction_set_operands(inst, dst, src0, src1, src2);
2132    }
2133
2134    return inst;
2135 }
2136
2137
2138 struct asm_instruction *
2139 asm_instruction_copy_ctor(const struct prog_instruction *base,
2140                           const struct prog_dst_register *dst,
2141                           const struct asm_src_register *src0,
2142                           const struct asm_src_register *src1,
2143                           const struct asm_src_register *src2)
2144 {
2145    struct asm_instruction *inst = CALLOC_STRUCT(asm_instruction);
2146
2147    if (inst) {
2148       _mesa_init_instructions(& inst->Base, 1);
2149       inst->Base.Opcode = base->Opcode;
2150       inst->Base.Saturate = base->Saturate;
2151
2152       asm_instruction_set_operands(inst, dst, src0, src1, src2);
2153    }
2154
2155    return inst;
2156 }
2157
2158
2159 void
2160 init_dst_reg(struct prog_dst_register *r)
2161 {
2162    memset(r, 0, sizeof(*r));
2163    r->File = PROGRAM_UNDEFINED;
2164    r->WriteMask = WRITEMASK_XYZW;
2165 }
2166
2167
2168 /** Like init_dst_reg() but set the File and Index fields. */
2169 void
2170 set_dst_reg(struct prog_dst_register *r, gl_register_file file, GLint index)
2171 {
2172    const GLint maxIndex = 1 << INST_INDEX_BITS;
2173    const GLint minIndex = 0;
2174    assert(index >= minIndex);
2175    (void) minIndex;
2176    assert(index <= maxIndex);
2177    (void) maxIndex;
2178    assert(file == PROGRAM_TEMPORARY ||
2179           file == PROGRAM_ADDRESS ||
2180           file == PROGRAM_OUTPUT);
2181    memset(r, 0, sizeof(*r));
2182    r->File = file;
2183    r->Index = index;
2184    r->WriteMask = WRITEMASK_XYZW;
2185 }
2186
2187
2188 void
2189 init_src_reg(struct asm_src_register *r)
2190 {
2191    memset(r, 0, sizeof(*r));
2192    r->Base.File = PROGRAM_UNDEFINED;
2193    r->Base.Swizzle = SWIZZLE_NOOP;
2194    r->Symbol = NULL;
2195 }
2196
2197
2198 /** Like init_src_reg() but set the File and Index fields.
2199  * \return GL_TRUE if a valid src register, GL_FALSE otherwise
2200  */
2201 void
2202 set_src_reg(struct asm_src_register *r, gl_register_file file, GLint index)
2203 {
2204    set_src_reg_swz(r, file, index, SWIZZLE_XYZW);
2205 }
2206
2207
2208 void
2209 set_src_reg_swz(struct asm_src_register *r, gl_register_file file, GLint index,
2210                 GLuint swizzle)
2211 {
2212    const GLint maxIndex = (1 << INST_INDEX_BITS) - 1;
2213    const GLint minIndex = -(1 << INST_INDEX_BITS);
2214    assert(file < PROGRAM_FILE_MAX);
2215    assert(index >= minIndex);
2216    (void) minIndex;
2217    assert(index <= maxIndex);
2218    (void) maxIndex;
2219    memset(r, 0, sizeof(*r));
2220    r->Base.File = file;
2221    r->Base.Index = index;
2222    r->Base.Swizzle = swizzle;
2223    r->Symbol = NULL;
2224 }
2225
2226
2227 /**
2228  * Validate the set of inputs used by a program
2229  *
2230  * Validates that legal sets of inputs are used by the program.  In this case
2231  * "used" included both reading the input or binding the input to a name using
2232  * the \c ATTRIB command.
2233  *
2234  * \return
2235  * \c TRUE if the combination of inputs used is valid, \c FALSE otherwise.
2236  */
2237 int
2238 validate_inputs(struct YYLTYPE *locp, struct asm_parser_state *state)
2239 {
2240    const GLbitfield64 inputs = state->prog->InputsRead | state->InputsBound;
2241
2242    if (((inputs & VERT_BIT_FF_ALL) & (inputs >> VERT_ATTRIB_GENERIC0)) != 0) {
2243       yyerror(locp, state, "illegal use of generic attribute and name attribute");
2244       return 0;
2245    }
2246
2247    return 1;
2248 }
2249
2250
2251 struct asm_symbol *
2252 declare_variable(struct asm_parser_state *state, char *name, enum asm_type t,
2253                  struct YYLTYPE *locp)
2254 {
2255    struct asm_symbol *s = NULL;
2256    struct asm_symbol *exist = (struct asm_symbol *)
2257       _mesa_symbol_table_find_symbol(state->st, 0, name);
2258
2259
2260    if (exist != NULL) {
2261       yyerror(locp, state, "redeclared identifier");
2262    } else {
2263       s = calloc(1, sizeof(struct asm_symbol));
2264       s->name = name;
2265       s->type = t;
2266
2267       switch (t) {
2268       case at_temp:
2269          if (state->prog->NumTemporaries >= state->limits->MaxTemps) {
2270             yyerror(locp, state, "too many temporaries declared");
2271             free(s);
2272             return NULL;
2273          }
2274
2275          s->temp_binding = state->prog->NumTemporaries;
2276          state->prog->NumTemporaries++;
2277          break;
2278
2279       case at_address:
2280          if (state->prog->NumAddressRegs >= state->limits->MaxAddressRegs) {
2281             yyerror(locp, state, "too many address registers declared");
2282             free(s);
2283             return NULL;
2284          }
2285
2286          /* FINISHME: Add support for multiple address registers.
2287           */
2288          state->prog->NumAddressRegs++;
2289          break;
2290
2291       default:
2292          break;
2293       }
2294
2295       _mesa_symbol_table_add_symbol(state->st, 0, s->name, s);
2296       s->next = state->sym;
2297       state->sym = s;
2298    }
2299
2300    return s;
2301 }
2302
2303
2304 int add_state_reference(struct gl_program_parameter_list *param_list,
2305                         const gl_state_index tokens[STATE_LENGTH])
2306 {
2307    const GLuint size = 4; /* XXX fix */
2308    char *name;
2309    GLint index;
2310
2311    name = _mesa_program_state_string(tokens);
2312    index = _mesa_add_parameter(param_list, PROGRAM_STATE_VAR, name,
2313                                size, GL_NONE, NULL, tokens);
2314    param_list->StateFlags |= _mesa_program_state_flags(tokens);
2315
2316    /* free name string here since we duplicated it in add_parameter() */
2317    free(name);
2318
2319    return index;
2320 }
2321
2322
2323 int
2324 initialize_symbol_from_state(struct gl_program *prog,
2325                              struct asm_symbol *param_var,
2326                              const gl_state_index tokens[STATE_LENGTH])
2327 {
2328    int idx = -1;
2329    gl_state_index state_tokens[STATE_LENGTH];
2330
2331
2332    memcpy(state_tokens, tokens, sizeof(state_tokens));
2333
2334    param_var->type = at_param;
2335    param_var->param_binding_type = PROGRAM_STATE_VAR;
2336
2337    /* If we are adding a STATE_MATRIX that has multiple rows, we need to
2338     * unroll it and call add_state_reference() for each row
2339     */
2340    if ((state_tokens[0] == STATE_MODELVIEW_MATRIX ||
2341         state_tokens[0] == STATE_PROJECTION_MATRIX ||
2342         state_tokens[0] == STATE_MVP_MATRIX ||
2343         state_tokens[0] == STATE_TEXTURE_MATRIX ||
2344         state_tokens[0] == STATE_PROGRAM_MATRIX)
2345        && (state_tokens[2] != state_tokens[3])) {
2346       int row;
2347       const int first_row = state_tokens[2];
2348       const int last_row = state_tokens[3];
2349
2350       for (row = first_row; row <= last_row; row++) {
2351          state_tokens[2] = state_tokens[3] = row;
2352
2353          idx = add_state_reference(prog->Parameters, state_tokens);
2354          if (param_var->param_binding_begin == ~0U) {
2355             param_var->param_binding_begin = idx;
2356             param_var->param_binding_swizzle = SWIZZLE_XYZW;
2357          }
2358
2359          param_var->param_binding_length++;
2360       }
2361    }
2362    else {
2363       idx = add_state_reference(prog->Parameters, state_tokens);
2364       if (param_var->param_binding_begin == ~0U) {
2365          param_var->param_binding_begin = idx;
2366          param_var->param_binding_swizzle = SWIZZLE_XYZW;
2367       }
2368       param_var->param_binding_length++;
2369    }
2370
2371    return idx;
2372 }
2373
2374
2375 int
2376 initialize_symbol_from_param(struct gl_program *prog,
2377                              struct asm_symbol *param_var,
2378                              const gl_state_index tokens[STATE_LENGTH])
2379 {
2380    int idx = -1;
2381    gl_state_index state_tokens[STATE_LENGTH];
2382
2383
2384    memcpy(state_tokens, tokens, sizeof(state_tokens));
2385
2386    assert((state_tokens[0] == STATE_VERTEX_PROGRAM)
2387           || (state_tokens[0] == STATE_FRAGMENT_PROGRAM));
2388    assert((state_tokens[1] == STATE_ENV)
2389           || (state_tokens[1] == STATE_LOCAL));
2390
2391    /*
2392     * The param type is STATE_VAR.  The program parameter entry will
2393     * effectively be a pointer into the LOCAL or ENV parameter array.
2394     */
2395    param_var->type = at_param;
2396    param_var->param_binding_type = PROGRAM_STATE_VAR;
2397
2398    /* If we are adding a STATE_ENV or STATE_LOCAL that has multiple elements,
2399     * we need to unroll it and call add_state_reference() for each row
2400     */
2401    if (state_tokens[2] != state_tokens[3]) {
2402       int row;
2403       const int first_row = state_tokens[2];
2404       const int last_row = state_tokens[3];
2405
2406       for (row = first_row; row <= last_row; row++) {
2407          state_tokens[2] = state_tokens[3] = row;
2408
2409          idx = add_state_reference(prog->Parameters, state_tokens);
2410          if (param_var->param_binding_begin == ~0U) {
2411             param_var->param_binding_begin = idx;
2412             param_var->param_binding_swizzle = SWIZZLE_XYZW;
2413          }
2414          param_var->param_binding_length++;
2415       }
2416    }
2417    else {
2418       idx = add_state_reference(prog->Parameters, state_tokens);
2419       if (param_var->param_binding_begin == ~0U) {
2420          param_var->param_binding_begin = idx;
2421          param_var->param_binding_swizzle = SWIZZLE_XYZW;
2422       }
2423       param_var->param_binding_length++;
2424    }
2425
2426    return idx;
2427 }
2428
2429
2430 /**
2431  * Put a float/vector constant/literal into the parameter list.
2432  * \param param_var  returns info about the parameter/constant's location,
2433  *                   binding, type, etc.
2434  * \param vec  the vector/constant to add
2435  * \param allowSwizzle  if true, try to consolidate constants which only differ
2436  *                      by a swizzle.  We don't want to do this when building
2437  *                      arrays of constants that may be indexed indirectly.
2438  * \return index of the constant in the parameter list.
2439  */
2440 int
2441 initialize_symbol_from_const(struct gl_program *prog,
2442                              struct asm_symbol *param_var,
2443                              const struct asm_vector *vec,
2444                              GLboolean allowSwizzle)
2445 {
2446    unsigned swizzle;
2447    const int idx = _mesa_add_unnamed_constant(prog->Parameters,
2448                                               vec->data, vec->count,
2449                                               allowSwizzle ? &swizzle : NULL);
2450
2451    param_var->type = at_param;
2452    param_var->param_binding_type = PROGRAM_CONSTANT;
2453
2454    if (param_var->param_binding_begin == ~0U) {
2455       param_var->param_binding_begin = idx;
2456       param_var->param_binding_swizzle = allowSwizzle ? swizzle : SWIZZLE_XYZW;
2457    }
2458    param_var->param_binding_length++;
2459
2460    return idx;
2461 }
2462
2463
2464 char *
2465 make_error_string(const char *fmt, ...)
2466 {
2467    int length;
2468    char *str;
2469    va_list args;
2470
2471
2472    /* Call vsnprintf once to determine how large the final string is.  Call it
2473     * again to do the actual formatting.  from the vsnprintf manual page:
2474     *
2475     *    Upon successful return, these functions return the number of
2476     *    characters printed  (not including the trailing '\0' used to end
2477     *    output to strings).
2478     */
2479    va_start(args, fmt);
2480    length = 1 + vsnprintf(NULL, 0, fmt, args);
2481    va_end(args);
2482
2483    str = malloc(length);
2484    if (str) {
2485       va_start(args, fmt);
2486       vsnprintf(str, length, fmt, args);
2487       va_end(args);
2488    }
2489
2490    return str;
2491 }
2492
2493
2494 void
2495 yyerror(YYLTYPE *locp, struct asm_parser_state *state, const char *s)
2496 {
2497    char *err_str;
2498
2499
2500    err_str = make_error_string("glProgramStringARB(%s)\n", s);
2501    if (err_str) {
2502       _mesa_error(state->ctx, GL_INVALID_OPERATION, "%s", err_str);
2503       free(err_str);
2504    }
2505
2506    err_str = make_error_string("line %u, char %u: error: %s\n",
2507                                locp->first_line, locp->first_column, s);
2508    _mesa_set_program_error(state->ctx, locp->position, err_str);
2509
2510    if (err_str) {
2511       free(err_str);
2512    }
2513 }
2514
2515
2516 GLboolean
2517 _mesa_parse_arb_program(struct gl_context *ctx, GLenum target, const GLubyte *str,
2518                         GLsizei len, struct asm_parser_state *state)
2519 {
2520    struct asm_instruction *inst;
2521    unsigned i;
2522    GLubyte *strz;
2523    GLboolean result = GL_FALSE;
2524    void *temp;
2525    struct asm_symbol *sym;
2526
2527    state->ctx = ctx;
2528    state->prog->Target = target;
2529    state->prog->Parameters = _mesa_new_parameter_list();
2530
2531    /* Make a copy of the program string and force it to be NUL-terminated.
2532     */
2533    strz = (GLubyte *) malloc(len + 1);
2534    if (strz == NULL) {
2535       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glProgramStringARB");
2536       return GL_FALSE;
2537    }
2538    memcpy (strz, str, len);
2539    strz[len] = '\0';
2540
2541    state->prog->String = strz;
2542
2543    state->st = _mesa_symbol_table_ctor();
2544
2545    state->limits = (target == GL_VERTEX_PROGRAM_ARB)
2546       ? & ctx->Const.Program[MESA_SHADER_VERTEX]
2547       : & ctx->Const.Program[MESA_SHADER_FRAGMENT];
2548
2549    state->MaxTextureImageUnits = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
2550    state->MaxTextureCoordUnits = ctx->Const.MaxTextureCoordUnits;
2551    state->MaxTextureUnits = ctx->Const.MaxTextureUnits;
2552    state->MaxClipPlanes = ctx->Const.MaxClipPlanes;
2553    state->MaxLights = ctx->Const.MaxLights;
2554    state->MaxProgramMatrices = ctx->Const.MaxProgramMatrices;
2555    state->MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
2556
2557    state->state_param_enum = (target == GL_VERTEX_PROGRAM_ARB)
2558       ? STATE_VERTEX_PROGRAM : STATE_FRAGMENT_PROGRAM;
2559
2560    _mesa_set_program_error(ctx, -1, NULL);
2561
2562    _mesa_program_lexer_ctor(& state->scanner, state, (const char *) str, len);
2563    yyparse(state);
2564    _mesa_program_lexer_dtor(state->scanner);
2565
2566
2567    if (ctx->Program.ErrorPos != -1) {
2568       goto error;
2569    }
2570
2571    if (! _mesa_layout_parameters(state)) {
2572       struct YYLTYPE loc;
2573
2574       loc.first_line = 0;
2575       loc.first_column = 0;
2576       loc.position = len;
2577
2578       yyerror(& loc, state, "invalid PARAM usage");
2579       goto error;
2580    }
2581
2582
2583
2584    /* Add one instruction to store the "END" instruction.
2585     */
2586    state->prog->Instructions =
2587       _mesa_alloc_instructions(state->prog->NumInstructions + 1);
2588
2589    if (state->prog->Instructions == NULL) {
2590       goto error;
2591    }
2592
2593    inst = state->inst_head;
2594    for (i = 0; i < state->prog->NumInstructions; i++) {
2595       struct asm_instruction *const temp = inst->next;
2596
2597       state->prog->Instructions[i] = inst->Base;
2598       inst = temp;
2599    }
2600
2601    /* Finally, tag on an OPCODE_END instruction */
2602    {
2603       const GLuint numInst = state->prog->NumInstructions;
2604       _mesa_init_instructions(state->prog->Instructions + numInst, 1);
2605       state->prog->Instructions[numInst].Opcode = OPCODE_END;
2606    }
2607    state->prog->NumInstructions++;
2608
2609    state->prog->NumParameters = state->prog->Parameters->NumParameters;
2610    state->prog->NumAttributes = _mesa_bitcount_64(state->prog->InputsRead);
2611
2612    /*
2613     * Initialize native counts to logical counts.  The device driver may
2614     * change them if program is translated into a hardware program.
2615     */
2616    state->prog->NumNativeInstructions = state->prog->NumInstructions;
2617    state->prog->NumNativeTemporaries = state->prog->NumTemporaries;
2618    state->prog->NumNativeParameters = state->prog->NumParameters;
2619    state->prog->NumNativeAttributes = state->prog->NumAttributes;
2620    state->prog->NumNativeAddressRegs = state->prog->NumAddressRegs;
2621
2622    result = GL_TRUE;
2623
2624 error:
2625    for (inst = state->inst_head; inst != NULL; inst = temp) {
2626       temp = inst->next;
2627       free(inst);
2628    }
2629
2630    state->inst_head = NULL;
2631    state->inst_tail = NULL;
2632
2633    for (sym = state->sym; sym != NULL; sym = temp) {
2634       temp = sym->next;
2635
2636       free((void *) sym->name);
2637       free(sym);
2638    }
2639    state->sym = NULL;
2640
2641    _mesa_symbol_table_dtor(state->st);
2642    state->st = NULL;
2643
2644    return result;
2645 }