src/gallium/auxiliary/tgsi/tgsi_build.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "util/u_debug.h"
  29 #include "pipe/p_shader_tokens.h"
  30 #include "tgsi_build.h"
  31 #include "tgsi_parse.h"
  32
  33 /*
  34  * version
  35  */
  36
  37 struct tgsi_version
  38 tgsi_build_version( void )
  39 {
  40    struct tgsi_version  version;
  41
  42    version.MajorVersion = 1;
  43    version.MinorVersion = 1;
  44    version.Padding = 0;
  45
  46    return version;
  47 }
  48
  49 /*
  50  * header
  51  */
  52
  53 struct tgsi_header
  54 tgsi_build_header( void )
  55 {
  56    struct tgsi_header header;
  57
  58    header.HeaderSize = 1;
  59    header.BodySize = 0;
  60
  61    return header;
  62 }
  63
  64 static void
  65 header_headersize_grow( struct tgsi_header *header )
  66 {
  67    assert( header->HeaderSize < 0xFF );
  68    assert( header->BodySize == 0 );
  69
  70    header->HeaderSize++;
  71 }
  72
  73 static void
  74 header_bodysize_grow( struct tgsi_header *header )
  75 {
  76    assert( header->BodySize < 0xFFFFFF );
  77
  78    header->BodySize++;
  79 }
  80
  81 struct tgsi_processor
  82 tgsi_default_processor( void )
  83 {
  84    struct tgsi_processor processor;
  85
  86    processor.Processor = TGSI_PROCESSOR_FRAGMENT;
  87    processor.Padding = 0;
  88
  89    return processor;
  90 }
  91
  92 struct tgsi_processor
  93 tgsi_build_processor(
  94    unsigned type,
  95    struct tgsi_header *header )
  96 {
  97    struct tgsi_processor processor;
  98
  99    processor = tgsi_default_processor();
 100    processor.Processor = type;
 101
 102    header_headersize_grow( header );
 103
 104    return processor;
 105 }
 106
 107 /*
 108  * declaration
 109  */
 110
 111 struct tgsi_declaration
 112 tgsi_default_declaration( void )
 113 {
 114    struct tgsi_declaration declaration;
 115
 116    declaration.Type = TGSI_TOKEN_TYPE_DECLARATION;
 117    declaration.NrTokens = 1;
 118    declaration.File = TGSI_FILE_NULL;
 119    declaration.UsageMask = TGSI_WRITEMASK_XYZW;
 120    declaration.Interpolate = TGSI_INTERPOLATE_CONSTANT;
 121    declaration.Semantic = 0;
 122    declaration.Centroid = 0;
 123    declaration.Invariant = 0;
 124    declaration.Padding = 0;
 125    declaration.Extended = 0;
 126
 127    return declaration;
 128 }
 129
 130 struct tgsi_declaration
 131 tgsi_build_declaration(
 132    unsigned file,
 133    unsigned usage_mask,
 134    unsigned interpolate,
 135    unsigned semantic,
 136    unsigned centroid,
 137    unsigned invariant,
 138    struct tgsi_header *header )
 139 {
 140    struct tgsi_declaration declaration;
 141
 142    assert( file < TGSI_FILE_COUNT );
 143    assert( interpolate < TGSI_INTERPOLATE_COUNT );
 144
 145    declaration = tgsi_default_declaration();
 146    declaration.File = file;
 147    declaration.UsageMask = usage_mask;
 148    declaration.Interpolate = interpolate;
 149    declaration.Semantic = semantic;
 150    declaration.Centroid = centroid;
 151    declaration.Invariant = invariant;
 152
 153    header_bodysize_grow( header );
 154
 155    return declaration;
 156 }
 157
 158 static void
 159 declaration_grow(
 160    struct tgsi_declaration *declaration,
 161    struct tgsi_header *header )
 162 {
 163    assert( declaration->NrTokens < 0xFF );
 164
 165    declaration->NrTokens++;
 166
 167    header_bodysize_grow( header );
 168 }
 169
 170 struct tgsi_full_declaration
 171 tgsi_default_full_declaration( void )
 172 {
 173    struct tgsi_full_declaration  full_declaration;
 174
 175    full_declaration.Declaration  = tgsi_default_declaration();
 176    full_declaration.DeclarationRange = tgsi_default_declaration_range();
 177    full_declaration.Semantic = tgsi_default_declaration_semantic();
 178
 179    return full_declaration;
 180 }
 181
 182 unsigned
 183 tgsi_build_full_declaration(
 184    const struct tgsi_full_declaration *full_decl,
 185    struct tgsi_token *tokens,
 186    struct tgsi_header *header,
 187    unsigned maxsize )
 188 {
 189    unsigned size = 0;
 190    struct tgsi_declaration *declaration;
 191    struct tgsi_declaration_range *dr;
 192
 193    if( maxsize <= size )
 194      return 0;
 195    declaration = (struct tgsi_declaration *) &tokens[size];
 196    size++;
 197
 198    *declaration = tgsi_build_declaration(
 199       full_decl->Declaration.File,
 200       full_decl->Declaration.UsageMask,
 201       full_decl->Declaration.Interpolate,
 202       full_decl->Declaration.Semantic,
 203       full_decl->Declaration.Centroid,
 204       full_decl->Declaration.Invariant,
 205       header );
 206
 207    if (maxsize <= size)
 208       return 0;
 209    dr = (struct tgsi_declaration_range *) &tokens[size];
 210    size++;
 211
 212    *dr = tgsi_build_declaration_range(
 213       full_decl->DeclarationRange.First,
 214       full_decl->DeclarationRange.Last,
 215       declaration,
 216       header );
 217
 218    if( full_decl->Declaration.Semantic ) {
 219       struct tgsi_declaration_semantic *ds;
 220
 221       if( maxsize <= size )
 222          return  0;
 223       ds = (struct tgsi_declaration_semantic *) &tokens[size];
 224       size++;
 225
 226       *ds = tgsi_build_declaration_semantic(
 227          full_decl->Semantic.SemanticName,
 228          full_decl->Semantic.SemanticIndex,
 229          declaration,
 230          header );
 231    }
 232
 233    return size;
 234 }
 235
 236 struct tgsi_declaration_range
 237 tgsi_default_declaration_range( void )
 238 {
 239    struct tgsi_declaration_range dr;
 240
 241    dr.First = 0;
 242    dr.Last = 0;
 243
 244    return dr;
 245 }
 246
 247 struct tgsi_declaration_range
 248 tgsi_build_declaration_range(
 249    unsigned first,
 250    unsigned last,
 251    struct tgsi_declaration *declaration,
 252    struct tgsi_header *header )
 253 {
 254    struct tgsi_declaration_range declaration_range;
 255
 256    assert( last >= first );
 257    assert( last <= 0xFFFF );
 258
 259    declaration_range = tgsi_default_declaration_range();
 260    declaration_range.First = first;
 261    declaration_range.Last = last;
 262
 263    declaration_grow( declaration, header );
 264
 265    return declaration_range;
 266 }
 267
 268 struct tgsi_declaration_semantic
 269 tgsi_default_declaration_semantic( void )
 270 {
 271    struct tgsi_declaration_semantic ds;
 272
 273    ds.SemanticName = TGSI_SEMANTIC_POSITION;
 274    ds.SemanticIndex = 0;
 275    ds.Padding = 0;
 276
 277    return ds;
 278 }
 279
 280 struct tgsi_declaration_semantic
 281 tgsi_build_declaration_semantic(
 282    unsigned semantic_name,
 283    unsigned semantic_index,
 284    struct tgsi_declaration *declaration,
 285    struct tgsi_header *header )
 286 {
 287    struct tgsi_declaration_semantic ds;
 288
 289    assert( semantic_name <= TGSI_SEMANTIC_COUNT );
 290    assert( semantic_index <= 0xFFFF );
 291
 292    ds = tgsi_default_declaration_semantic();
 293    ds.SemanticName = semantic_name;
 294    ds.SemanticIndex = semantic_index;
 295
 296    declaration_grow( declaration, header );
 297
 298    return ds;
 299 }
 300
 301 /*
 302  * immediate
 303  */
 304
 305 struct tgsi_immediate
 306 tgsi_default_immediate( void )
 307 {
 308    struct tgsi_immediate immediate;
 309
 310    immediate.Type = TGSI_TOKEN_TYPE_IMMEDIATE;
 311    immediate.NrTokens = 1;
 312    immediate.DataType = TGSI_IMM_FLOAT32;
 313    immediate.Padding = 0;
 314    immediate.Extended = 0;
 315
 316    return immediate;
 317 }
 318
 319 struct tgsi_immediate
 320 tgsi_build_immediate(
 321    struct tgsi_header *header )
 322 {
 323    struct tgsi_immediate immediate;
 324
 325    immediate = tgsi_default_immediate();
 326
 327    header_bodysize_grow( header );
 328
 329    return immediate;
 330 }
 331
 332 struct tgsi_full_immediate
 333 tgsi_default_full_immediate( void )
 334 {
 335    struct tgsi_full_immediate fullimm;
 336
 337    fullimm.Immediate = tgsi_default_immediate();
 338    fullimm.u[0].Float = 0.0f;
 339    fullimm.u[1].Float = 0.0f;
 340    fullimm.u[2].Float = 0.0f;
 341    fullimm.u[3].Float = 0.0f;
 342
 343    return fullimm;
 344 }
 345
 346 static void
 347 immediate_grow(
 348    struct tgsi_immediate *immediate,
 349    struct tgsi_header *header )
 350 {
 351    assert( immediate->NrTokens < 0xFF );
 352
 353    immediate->NrTokens++;
 354
 355    header_bodysize_grow( header );
 356 }
 357
 358 union tgsi_immediate_data
 359 tgsi_build_immediate_float32(
 360    float value,
 361    struct tgsi_immediate *immediate,
 362    struct tgsi_header *header )
 363 {
 364    union tgsi_immediate_data immediate_data;
 365
 366    immediate_data.Float = value;
 367
 368    immediate_grow( immediate, header );
 369
 370    return immediate_data;
 371 }
 372
 373 unsigned
 374 tgsi_build_full_immediate(
 375    const struct tgsi_full_immediate *full_imm,
 376    struct tgsi_token *tokens,
 377    struct tgsi_header *header,
 378    unsigned maxsize )
 379 {
 380    unsigned size = 0, i;
 381    struct tgsi_immediate *immediate;
 382
 383    if( maxsize <= size )
 384       return 0;
 385    immediate = (struct tgsi_immediate *) &tokens[size];
 386    size++;
 387
 388    *immediate = tgsi_build_immediate( header );
 389
 390    assert( full_imm->Immediate.NrTokens <= 4 + 1 );
 391
 392    for( i = 0; i < full_imm->Immediate.NrTokens - 1; i++ ) {
 393       union tgsi_immediate_data *data;
 394
 395       if( maxsize <= size )
 396          return  0;
 397       data = (union tgsi_immediate_data *) &tokens[size];
 398       size++;
 399
 400       *data = tgsi_build_immediate_float32(
 401          full_imm->u[i].Float,
 402          immediate,
 403          header );
 404    }
 405
 406    return size;
 407 }
 408
 409 /*
 410  * instruction
 411  */
 412
 413 struct tgsi_instruction
 414 tgsi_default_instruction( void )
 415 {
 416    struct tgsi_instruction instruction;
 417
 418    instruction.Type = TGSI_TOKEN_TYPE_INSTRUCTION;
 419    instruction.NrTokens = 1;
 420    instruction.Opcode = TGSI_OPCODE_MOV;
 421    instruction.Saturate = TGSI_SAT_NONE;
 422    instruction.NumDstRegs = 1;
 423    instruction.NumSrcRegs = 1;
 424    instruction.Padding  = 0;
 425    instruction.Extended = 0;
 426
 427    return instruction;
 428 }
 429
 430 struct tgsi_instruction
 431 tgsi_build_instruction(
 432    unsigned opcode,
 433    unsigned saturate,
 434    unsigned num_dst_regs,
 435    unsigned num_src_regs,
 436    struct tgsi_header *header )
 437 {
 438    struct tgsi_instruction instruction;
 439
 440    assert (opcode <= TGSI_OPCODE_LAST);
 441    assert (saturate <= TGSI_SAT_MINUS_PLUS_ONE);
 442    assert (num_dst_regs <= 3);
 443    assert (num_src_regs <= 15);
 444
 445    instruction = tgsi_default_instruction();
 446    instruction.Opcode = opcode;
 447    instruction.Saturate = saturate;
 448    instruction.NumDstRegs = num_dst_regs;
 449    instruction.NumSrcRegs = num_src_regs;
 450
 451    header_bodysize_grow( header );
 452
 453    return instruction;
 454 }
 455
 456 static void
 457 instruction_grow(
 458    struct tgsi_instruction *instruction,
 459    struct tgsi_header *header )
 460 {
 461    assert (instruction->NrTokens <   0xFF);
 462
 463    instruction->NrTokens++;
 464
 465    header_bodysize_grow( header );
 466 }
 467
 468 struct tgsi_full_instruction
 469 tgsi_default_full_instruction( void )
 470 {
 471    struct tgsi_full_instruction full_instruction;
 472    unsigned i;
 473
 474    full_instruction.Instruction = tgsi_default_instruction();
 475    full_instruction.InstructionExtNv = tgsi_default_instruction_ext_nv();
 476    full_instruction.InstructionExtLabel = tgsi_default_instruction_ext_label();
 477    full_instruction.InstructionExtTexture = tgsi_default_instruction_ext_texture();
 478    for( i = 0;  i < TGSI_FULL_MAX_DST_REGISTERS; i++ ) {
 479       full_instruction.FullDstRegisters[i] = tgsi_default_full_dst_register();
 480    }
 481    for( i = 0;  i < TGSI_FULL_MAX_SRC_REGISTERS; i++ ) {
 482       full_instruction.FullSrcRegisters[i] = tgsi_default_full_src_register();
 483    }
 484
 485    return full_instruction;
 486 }
 487
 488 unsigned
 489 tgsi_build_full_instruction(
 490    const struct tgsi_full_instruction *full_inst,
 491    struct  tgsi_token *tokens,
 492    struct  tgsi_header *header,
 493    unsigned  maxsize )
 494 {
 495    unsigned size = 0;
 496    unsigned i;
 497    struct tgsi_instruction *instruction;
 498    struct tgsi_token *prev_token;
 499
 500    if( maxsize <= size )
 501       return 0;
 502    instruction = (struct tgsi_instruction *) &tokens[size];
 503    size++;
 504
 505    *instruction = tgsi_build_instruction(
 506       full_inst->Instruction.Opcode,
 507       full_inst->Instruction.Saturate,
 508       full_inst->Instruction.NumDstRegs,
 509       full_inst->Instruction.NumSrcRegs,
 510       header );
 511    prev_token = (struct tgsi_token  *) instruction;
 512
 513    if( tgsi_compare_instruction_ext_nv(
 514          full_inst->InstructionExtNv,
 515          tgsi_default_instruction_ext_nv() ) ) {
 516       struct tgsi_instruction_ext_nv *instruction_ext_nv;
 517
 518       if( maxsize <= size )
 519          return 0;
 520       instruction_ext_nv =
 521          (struct  tgsi_instruction_ext_nv *) &tokens[size];
 522       size++;
 523
 524       *instruction_ext_nv  = tgsi_build_instruction_ext_nv(
 525          full_inst->InstructionExtNv.Precision,
 526          full_inst->InstructionExtNv.CondDstIndex,
 527          full_inst->InstructionExtNv.CondFlowIndex,
 528          full_inst->InstructionExtNv.CondMask,
 529          full_inst->InstructionExtNv.CondSwizzleX,
 530          full_inst->InstructionExtNv.CondSwizzleY,
 531          full_inst->InstructionExtNv.CondSwizzleZ,
 532          full_inst->InstructionExtNv.CondSwizzleW,
 533          full_inst->InstructionExtNv.CondDstUpdate,
 534          full_inst->InstructionExtNv.CondFlowEnable,
 535          prev_token,
 536          instruction,
 537          header );
 538       prev_token = (struct tgsi_token  *) instruction_ext_nv;
 539    }
 540
 541    if( tgsi_compare_instruction_ext_label(
 542          full_inst->InstructionExtLabel,
 543          tgsi_default_instruction_ext_label() ) ) {
 544       struct tgsi_instruction_ext_label *instruction_ext_label;
 545
 546       if( maxsize <= size )
 547          return 0;
 548       instruction_ext_label =
 549          (struct  tgsi_instruction_ext_label *) &tokens[size];
 550       size++;
 551
 552       *instruction_ext_label = tgsi_build_instruction_ext_label(
 553          full_inst->InstructionExtLabel.Label,
 554          prev_token,
 555          instruction,
 556          header );
 557       prev_token = (struct tgsi_token  *) instruction_ext_label;
 558    }
 559
 560    if( tgsi_compare_instruction_ext_texture(
 561          full_inst->InstructionExtTexture,
 562          tgsi_default_instruction_ext_texture() ) ) {
 563       struct tgsi_instruction_ext_texture *instruction_ext_texture;
 564
 565       if( maxsize <= size )
 566          return 0;
 567       instruction_ext_texture =
 568          (struct  tgsi_instruction_ext_texture *) &tokens[size];
 569       size++;
 570
 571       *instruction_ext_texture = tgsi_build_instruction_ext_texture(
 572          full_inst->InstructionExtTexture.Texture,
 573          prev_token,
 574          instruction,
 575          header   );
 576       prev_token = (struct tgsi_token  *) instruction_ext_texture;
 577    }
 578
 579    for( i = 0;  i <   full_inst->Instruction.NumDstRegs; i++ ) {
 580       const struct tgsi_full_dst_register *reg = &full_inst->FullDstRegisters[i];
 581       struct tgsi_dst_register *dst_register;
 582       struct tgsi_token *prev_token;
 583
 584       if( maxsize <= size )
 585          return 0;
 586       dst_register = (struct tgsi_dst_register *) &tokens[size];
 587       size++;
 588
 589       *dst_register = tgsi_build_dst_register(
 590          reg->DstRegister.File,
 591          reg->DstRegister.WriteMask,
 592          reg->DstRegister.Indirect,
 593          reg->DstRegister.Index,
 594          instruction,
 595          header );
 596       prev_token = (struct tgsi_token  *) dst_register;
 597
 598       if( tgsi_compare_dst_register_ext_concode(
 599             reg->DstRegisterExtConcode,
 600             tgsi_default_dst_register_ext_concode() ) ) {
 601          struct tgsi_dst_register_ext_concode *dst_register_ext_concode;
 602
 603          if( maxsize <= size )
 604             return 0;
 605          dst_register_ext_concode =
 606             (struct  tgsi_dst_register_ext_concode *) &tokens[size];
 607          size++;
 608
 609          *dst_register_ext_concode =   tgsi_build_dst_register_ext_concode(
 610             reg->DstRegisterExtConcode.CondMask,
 611             reg->DstRegisterExtConcode.CondSwizzleX,
 612             reg->DstRegisterExtConcode.CondSwizzleY,
 613             reg->DstRegisterExtConcode.CondSwizzleZ,
 614             reg->DstRegisterExtConcode.CondSwizzleW,
 615             reg->DstRegisterExtConcode.CondSrcIndex,
 616             prev_token,
 617             instruction,
 618             header );
 619          prev_token = (struct tgsi_token  *) dst_register_ext_concode;
 620       }
 621
 622       if( tgsi_compare_dst_register_ext_modulate(
 623             reg->DstRegisterExtModulate,
 624             tgsi_default_dst_register_ext_modulate() ) ) {
 625          struct tgsi_dst_register_ext_modulate *dst_register_ext_modulate;
 626
 627          if( maxsize <= size )
 628             return 0;
 629          dst_register_ext_modulate =
 630             (struct  tgsi_dst_register_ext_modulate *) &tokens[size];
 631          size++;
 632
 633          *dst_register_ext_modulate = tgsi_build_dst_register_ext_modulate(
 634             reg->DstRegisterExtModulate.Modulate,
 635             prev_token,
 636             instruction,
 637             header );
 638          prev_token = (struct tgsi_token  *) dst_register_ext_modulate;
 639       }
 640
 641       if( reg->DstRegister.Indirect ) {
 642          struct tgsi_src_register *ind;
 643
 644          if( maxsize <= size )
 645             return 0;
 646          ind = (struct tgsi_src_register *) &tokens[size];
 647          size++;
 648
 649          *ind = tgsi_build_src_register(
 650             reg->DstRegisterInd.File,
 651             reg->DstRegisterInd.SwizzleX,
 652             reg->DstRegisterInd.SwizzleY,
 653             reg->DstRegisterInd.SwizzleZ,
 654             reg->DstRegisterInd.SwizzleW,
 655             reg->DstRegisterInd.Negate,
 656             reg->DstRegisterInd.Indirect,
 657             reg->DstRegisterInd.Dimension,
 658             reg->DstRegisterInd.Index,
 659             instruction,
 660             header );
 661       }
 662    }
 663
 664    for( i = 0;  i < full_inst->Instruction.NumSrcRegs; i++ ) {
 665       const struct tgsi_full_src_register *reg = &full_inst->FullSrcRegisters[i];
 666       struct tgsi_src_register *src_register;
 667       struct tgsi_token *prev_token;
 668
 669       if( maxsize <= size )
 670          return 0;
 671       src_register = (struct tgsi_src_register *)  &tokens[size];
 672       size++;
 673
 674       *src_register = tgsi_build_src_register(
 675          reg->SrcRegister.File,
 676          reg->SrcRegister.SwizzleX,
 677          reg->SrcRegister.SwizzleY,
 678          reg->SrcRegister.SwizzleZ,
 679          reg->SrcRegister.SwizzleW,
 680          reg->SrcRegister.Negate,
 681          reg->SrcRegister.Indirect,
 682          reg->SrcRegister.Dimension,
 683          reg->SrcRegister.Index,
 684          instruction,
 685          header );
 686       prev_token = (struct tgsi_token  *) src_register;
 687
 688       if( tgsi_compare_src_register_ext_swz(
 689             reg->SrcRegisterExtSwz,
 690             tgsi_default_src_register_ext_swz() ) ) {
 691          struct tgsi_src_register_ext_swz *src_register_ext_swz;
 692
 693          /* Use of the extended swizzle requires the simple swizzle to be identity.
 694           */
 695          assert( reg->SrcRegister.SwizzleX == TGSI_SWIZZLE_X );
 696          assert( reg->SrcRegister.SwizzleY == TGSI_SWIZZLE_Y );
 697          assert( reg->SrcRegister.SwizzleZ == TGSI_SWIZZLE_Z );
 698          assert( reg->SrcRegister.SwizzleW == TGSI_SWIZZLE_W );
 699          assert( reg->SrcRegister.Negate == FALSE );
 700
 701          if( maxsize <= size )
 702             return 0;
 703          src_register_ext_swz =
 704             (struct  tgsi_src_register_ext_swz *) &tokens[size];
 705          size++;
 706
 707          *src_register_ext_swz = tgsi_build_src_register_ext_swz(
 708             reg->SrcRegisterExtSwz.ExtSwizzleX,
 709             reg->SrcRegisterExtSwz.ExtSwizzleY,
 710             reg->SrcRegisterExtSwz.ExtSwizzleZ,
 711             reg->SrcRegisterExtSwz.ExtSwizzleW,
 712             reg->SrcRegisterExtSwz.NegateX,
 713             reg->SrcRegisterExtSwz.NegateY,
 714             reg->SrcRegisterExtSwz.NegateZ,
 715             reg->SrcRegisterExtSwz.NegateW,
 716             prev_token,
 717             instruction,
 718             header );
 719          prev_token = (struct tgsi_token  *) src_register_ext_swz;
 720       }
 721
 722       if( tgsi_compare_src_register_ext_mod(
 723             reg->SrcRegisterExtMod,
 724             tgsi_default_src_register_ext_mod() ) ) {
 725          struct tgsi_src_register_ext_mod *src_register_ext_mod;
 726
 727          if( maxsize <= size )
 728             return 0;
 729          src_register_ext_mod =
 730             (struct  tgsi_src_register_ext_mod *) &tokens[size];
 731          size++;
 732
 733          *src_register_ext_mod = tgsi_build_src_register_ext_mod(
 734             reg->SrcRegisterExtMod.Complement,
 735             reg->SrcRegisterExtMod.Bias,
 736             reg->SrcRegisterExtMod.Scale2X,
 737             reg->SrcRegisterExtMod.Absolute,
 738             reg->SrcRegisterExtMod.Negate,
 739             prev_token,
 740             instruction,
 741             header );
 742          prev_token = (struct tgsi_token  *) src_register_ext_mod;
 743       }
 744
 745       if( reg->SrcRegister.Indirect ) {
 746          struct  tgsi_src_register *ind;
 747
 748          if( maxsize <= size )
 749             return 0;
 750          ind = (struct tgsi_src_register *) &tokens[size];
 751          size++;
 752
 753          *ind = tgsi_build_src_register(
 754             reg->SrcRegisterInd.File,
 755             reg->SrcRegisterInd.SwizzleX,
 756             reg->SrcRegisterInd.SwizzleY,
 757             reg->SrcRegisterInd.SwizzleZ,
 758             reg->SrcRegisterInd.SwizzleW,
 759             reg->SrcRegisterInd.Negate,
 760             reg->SrcRegisterInd.Indirect,
 761             reg->SrcRegisterInd.Dimension,
 762             reg->SrcRegisterInd.Index,
 763             instruction,
 764             header );
 765       }
 766
 767       if( reg->SrcRegister.Dimension ) {
 768          struct  tgsi_dimension *dim;
 769
 770          assert( !reg->SrcRegisterDim.Dimension );
 771
 772          if( maxsize <= size )
 773             return 0;
 774          dim = (struct tgsi_dimension *) &tokens[size];
 775          size++;
 776
 777          *dim = tgsi_build_dimension(
 778             reg->SrcRegisterDim.Indirect,
 779             reg->SrcRegisterDim.Index,
 780             instruction,
 781             header );
 782
 783          if( reg->SrcRegisterDim.Indirect ) {
 784             struct tgsi_src_register *ind;
 785
 786             if( maxsize <= size )
 787                return 0;
 788             ind = (struct tgsi_src_register *) &tokens[size];
 789             size++;
 790
 791             *ind = tgsi_build_src_register(
 792                reg->SrcRegisterDimInd.File,
 793                reg->SrcRegisterDimInd.SwizzleX,
 794                reg->SrcRegisterDimInd.SwizzleY,
 795                reg->SrcRegisterDimInd.SwizzleZ,
 796                reg->SrcRegisterDimInd.SwizzleW,
 797                reg->SrcRegisterDimInd.Negate,
 798                reg->SrcRegisterDimInd.Indirect,
 799                reg->SrcRegisterDimInd.Dimension,
 800                reg->SrcRegisterDimInd.Index,
 801                instruction,
 802                header );
 803          }
 804       }
 805    }
 806
 807    return size;
 808 }
 809
 810 struct tgsi_instruction_ext_nv
 811 tgsi_default_instruction_ext_nv( void )
 812 {
 813    struct tgsi_instruction_ext_nv instruction_ext_nv;
 814
 815    instruction_ext_nv.Type = TGSI_INSTRUCTION_EXT_TYPE_NV;
 816    instruction_ext_nv.Precision = TGSI_PRECISION_DEFAULT;
 817    instruction_ext_nv.CondDstIndex = 0;
 818    instruction_ext_nv.CondFlowIndex = 0;
 819    instruction_ext_nv.CondMask = TGSI_CC_TR;
 820    instruction_ext_nv.CondSwizzleX = TGSI_SWIZZLE_X;
 821    instruction_ext_nv.CondSwizzleY = TGSI_SWIZZLE_Y;
 822    instruction_ext_nv.CondSwizzleZ = TGSI_SWIZZLE_Z;
 823    instruction_ext_nv.CondSwizzleW = TGSI_SWIZZLE_W;
 824    instruction_ext_nv.CondDstUpdate = 0;
 825    instruction_ext_nv.CondFlowEnable = 0;
 826    instruction_ext_nv.Padding = 0;
 827    instruction_ext_nv.Extended = 0;
 828
 829    return instruction_ext_nv;
 830 }
 831
 832
 833 /** test for inequality of 32-bit values pointed to by a and b */
 834 static INLINE boolean
 835 compare32(const void *a, const void *b)
 836 {
 837    return *((uint32_t *) a) != *((uint32_t *) b);
 838 }
 839
 840
 841 unsigned
 842 tgsi_compare_instruction_ext_nv(
 843    struct tgsi_instruction_ext_nv a,
 844    struct tgsi_instruction_ext_nv b )
 845 {
 846    a.Padding = b.Padding = 0;
 847    a.Extended = b.Extended = 0;
 848    return compare32(&a, &b);
 849 }
 850
 851 struct tgsi_instruction_ext_nv
 852 tgsi_build_instruction_ext_nv(
 853    unsigned precision,
 854    unsigned cond_dst_index,
 855    unsigned cond_flow_index,
 856    unsigned cond_mask,
 857    unsigned cond_swizzle_x,
 858    unsigned cond_swizzle_y,
 859    unsigned cond_swizzle_z,
 860    unsigned cond_swizzle_w,
 861    unsigned cond_dst_update,
 862    unsigned cond_flow_enable,
 863    struct tgsi_token *prev_token,
 864    struct tgsi_instruction *instruction,
 865    struct tgsi_header *header )
 866 {
 867    struct tgsi_instruction_ext_nv instruction_ext_nv;
 868
 869    instruction_ext_nv = tgsi_default_instruction_ext_nv();
 870    instruction_ext_nv.Precision = precision;
 871    instruction_ext_nv.CondDstIndex = cond_dst_index;
 872    instruction_ext_nv.CondFlowIndex = cond_flow_index;
 873    instruction_ext_nv.CondMask = cond_mask;
 874    instruction_ext_nv.CondSwizzleX = cond_swizzle_x;
 875    instruction_ext_nv.CondSwizzleY = cond_swizzle_y;
 876    instruction_ext_nv.CondSwizzleZ = cond_swizzle_z;
 877    instruction_ext_nv.CondSwizzleW = cond_swizzle_w;
 878    instruction_ext_nv.CondDstUpdate = cond_dst_update;
 879    instruction_ext_nv.CondFlowEnable = cond_flow_enable;
 880
 881    prev_token->Extended = 1;
 882    instruction_grow( instruction, header );
 883
 884    return instruction_ext_nv;
 885 }
 886
 887 struct tgsi_instruction_ext_label
 888 tgsi_default_instruction_ext_label( void )
 889 {
 890    struct tgsi_instruction_ext_label instruction_ext_label;
 891
 892    instruction_ext_label.Type = TGSI_INSTRUCTION_EXT_TYPE_LABEL;
 893    instruction_ext_label.Label = 0;
 894    instruction_ext_label.Padding = 0;
 895    instruction_ext_label.Extended = 0;
 896
 897    return instruction_ext_label;
 898 }
 899
 900 unsigned
 901 tgsi_compare_instruction_ext_label(
 902    struct tgsi_instruction_ext_label a,
 903    struct tgsi_instruction_ext_label b )
 904 {
 905    a.Padding = b.Padding = 0;
 906    a.Extended = b.Extended = 0;
 907    return compare32(&a, &b);
 908 }
 909
 910 struct tgsi_instruction_ext_label
 911 tgsi_build_instruction_ext_label(
 912    unsigned label,
 913    struct tgsi_token  *prev_token,
 914    struct tgsi_instruction *instruction,
 915    struct tgsi_header *header )
 916 {
 917    struct tgsi_instruction_ext_label instruction_ext_label;
 918
 919    instruction_ext_label = tgsi_default_instruction_ext_label();
 920    instruction_ext_label.Label = label;
 921
 922    prev_token->Extended = 1;
 923    instruction_grow( instruction, header );
 924
 925    return instruction_ext_label;
 926 }
 927
 928 struct tgsi_instruction_ext_texture
 929 tgsi_default_instruction_ext_texture( void )
 930 {
 931    struct tgsi_instruction_ext_texture instruction_ext_texture;
 932
 933    instruction_ext_texture.Type = TGSI_INSTRUCTION_EXT_TYPE_TEXTURE;
 934    instruction_ext_texture.Texture = TGSI_TEXTURE_UNKNOWN;
 935    instruction_ext_texture.Padding = 0;
 936    instruction_ext_texture.Extended = 0;
 937
 938    return instruction_ext_texture;
 939 }
 940
 941 unsigned
 942 tgsi_compare_instruction_ext_texture(
 943    struct tgsi_instruction_ext_texture a,
 944    struct tgsi_instruction_ext_texture b )
 945 {
 946    a.Padding = b.Padding = 0;
 947    a.Extended = b.Extended = 0;
 948    return compare32(&a, &b);
 949 }
 950
 951 struct tgsi_instruction_ext_texture
 952 tgsi_build_instruction_ext_texture(
 953    unsigned texture,
 954    struct tgsi_token *prev_token,
 955    struct tgsi_instruction *instruction,
 956    struct tgsi_header *header )
 957 {
 958    struct tgsi_instruction_ext_texture instruction_ext_texture;
 959
 960    instruction_ext_texture = tgsi_default_instruction_ext_texture();
 961    instruction_ext_texture.Texture = texture;
 962
 963    prev_token->Extended = 1;
 964    instruction_grow( instruction, header );
 965
 966    return instruction_ext_texture;
 967 }
 968
 969 struct tgsi_src_register
 970 tgsi_default_src_register( void )
 971 {
 972    struct tgsi_src_register src_register;
 973
 974    src_register.File = TGSI_FILE_NULL;
 975    src_register.SwizzleX = TGSI_SWIZZLE_X;
 976    src_register.SwizzleY = TGSI_SWIZZLE_Y;
 977    src_register.SwizzleZ = TGSI_SWIZZLE_Z;
 978    src_register.SwizzleW = TGSI_SWIZZLE_W;
 979    src_register.Negate = 0;
 980    src_register.Indirect = 0;
 981    src_register.Dimension = 0;
 982    src_register.Index = 0;
 983    src_register.Extended = 0;
 984
 985    return src_register;
 986 }
 987
 988 struct tgsi_src_register
 989 tgsi_build_src_register(
 990    unsigned file,
 991    unsigned swizzle_x,
 992    unsigned swizzle_y,
 993    unsigned swizzle_z,
 994    unsigned swizzle_w,
 995    unsigned negate,
 996    unsigned indirect,
 997    unsigned dimension,
 998    int index,
 999    struct tgsi_instruction *instruction,
1000    struct tgsi_header *header )
1001 {
1002    struct tgsi_src_register   src_register;
1003
1004    assert( file < TGSI_FILE_COUNT );
1005    assert( swizzle_x <= TGSI_SWIZZLE_W );
1006    assert( swizzle_y <= TGSI_SWIZZLE_W );
1007    assert( swizzle_z <= TGSI_SWIZZLE_W );
1008    assert( swizzle_w <= TGSI_SWIZZLE_W );
1009    assert( negate <= 1 );
1010    assert( index >= -0x8000 && index <= 0x7FFF );
1011
1012    src_register = tgsi_default_src_register();
1013    src_register.File = file;
1014    src_register.SwizzleX = swizzle_x;
1015    src_register.SwizzleY = swizzle_y;
1016    src_register.SwizzleZ = swizzle_z;
1017    src_register.SwizzleW = swizzle_w;
1018    src_register.Negate = negate;
1019    src_register.Indirect = indirect;
1020    src_register.Dimension = dimension;
1021    src_register.Index = index;
1022
1023    instruction_grow( instruction, header );
1024
1025    return src_register;
1026 }
1027
1028 struct tgsi_full_src_register
1029 tgsi_default_full_src_register( void )
1030 {
1031    struct tgsi_full_src_register full_src_register;
1032
1033    full_src_register.SrcRegister = tgsi_default_src_register();
1034    full_src_register.SrcRegisterExtSwz = tgsi_default_src_register_ext_swz();
1035    full_src_register.SrcRegisterExtMod = tgsi_default_src_register_ext_mod();
1036    full_src_register.SrcRegisterInd = tgsi_default_src_register();
1037    full_src_register.SrcRegisterDim = tgsi_default_dimension();
1038    full_src_register.SrcRegisterDimInd = tgsi_default_src_register();
1039
1040    return full_src_register;
1041 }
1042
1043 struct tgsi_src_register_ext_swz
1044 tgsi_default_src_register_ext_swz( void )
1045 {
1046    struct tgsi_src_register_ext_swz src_register_ext_swz;
1047
1048    src_register_ext_swz.Type = TGSI_SRC_REGISTER_EXT_TYPE_SWZ;
1049    src_register_ext_swz.ExtSwizzleX = TGSI_EXTSWIZZLE_X;
1050    src_register_ext_swz.ExtSwizzleY = TGSI_EXTSWIZZLE_Y;
1051    src_register_ext_swz.ExtSwizzleZ = TGSI_EXTSWIZZLE_Z;
1052    src_register_ext_swz.ExtSwizzleW = TGSI_EXTSWIZZLE_W;
1053    src_register_ext_swz.NegateX = 0;
1054    src_register_ext_swz.NegateY = 0;
1055    src_register_ext_swz.NegateZ = 0;
1056    src_register_ext_swz.NegateW = 0;
1057    src_register_ext_swz.Padding = 0;
1058    src_register_ext_swz.Extended = 0;
1059
1060    return src_register_ext_swz;
1061 }
1062
1063 unsigned
1064 tgsi_compare_src_register_ext_swz(
1065    struct tgsi_src_register_ext_swz a,
1066    struct tgsi_src_register_ext_swz b )
1067 {
1068    a.Padding = b.Padding = 0;
1069    a.Extended = b.Extended = 0;
1070    return compare32(&a, &b);
1071 }
1072
1073 struct tgsi_src_register_ext_swz
1074 tgsi_build_src_register_ext_swz(
1075    unsigned ext_swizzle_x,
1076    unsigned ext_swizzle_y,
1077    unsigned ext_swizzle_z,
1078    unsigned ext_swizzle_w,
1079    unsigned negate_x,
1080    unsigned negate_y,
1081    unsigned negate_z,
1082    unsigned negate_w,
1083    struct tgsi_token *prev_token,
1084    struct tgsi_instruction *instruction,
1085    struct tgsi_header *header )
1086 {
1087    struct tgsi_src_register_ext_swz src_register_ext_swz;
1088
1089    assert( ext_swizzle_x <= TGSI_EXTSWIZZLE_ONE );
1090    assert( ext_swizzle_y <= TGSI_EXTSWIZZLE_ONE );
1091    assert( ext_swizzle_z <= TGSI_EXTSWIZZLE_ONE );
1092    assert( ext_swizzle_w <= TGSI_EXTSWIZZLE_ONE );
1093    assert( negate_x <= 1 );
1094    assert( negate_y <= 1 );
1095    assert( negate_z <= 1 );
1096    assert( negate_w <= 1 );
1097
1098    src_register_ext_swz = tgsi_default_src_register_ext_swz();
1099    src_register_ext_swz.ExtSwizzleX = ext_swizzle_x;
1100    src_register_ext_swz.ExtSwizzleY = ext_swizzle_y;
1101    src_register_ext_swz.ExtSwizzleZ = ext_swizzle_z;
1102    src_register_ext_swz.ExtSwizzleW = ext_swizzle_w;
1103    src_register_ext_swz.NegateX = negate_x;
1104    src_register_ext_swz.NegateY = negate_y;
1105    src_register_ext_swz.NegateZ = negate_z;
1106    src_register_ext_swz.NegateW = negate_w;
1107
1108    prev_token->Extended = 1;
1109    instruction_grow( instruction, header );
1110
1111    return src_register_ext_swz;
1112 }
1113
1114 struct tgsi_src_register_ext_mod
1115 tgsi_default_src_register_ext_mod( void )
1116 {
1117    struct tgsi_src_register_ext_mod src_register_ext_mod;
1118
1119    src_register_ext_mod.Type = TGSI_SRC_REGISTER_EXT_TYPE_MOD;
1120    src_register_ext_mod.Complement = 0;
1121    src_register_ext_mod.Bias = 0;
1122    src_register_ext_mod.Scale2X = 0;
1123    src_register_ext_mod.Absolute = 0;
1124    src_register_ext_mod.Negate = 0;
1125    src_register_ext_mod.Padding = 0;
1126    src_register_ext_mod.Extended = 0;
1127
1128    return src_register_ext_mod;
1129 }
1130
1131 unsigned
1132 tgsi_compare_src_register_ext_mod(
1133    struct tgsi_src_register_ext_mod a,
1134    struct tgsi_src_register_ext_mod b )
1135 {
1136    a.Padding = b.Padding = 0;
1137    a.Extended = b.Extended = 0;
1138    return compare32(&a, &b);
1139 }
1140
1141 struct tgsi_src_register_ext_mod
1142 tgsi_build_src_register_ext_mod(
1143    unsigned complement,
1144    unsigned bias,
1145    unsigned scale_2x,
1146    unsigned absolute,
1147    unsigned negate,
1148    struct tgsi_token *prev_token,
1149    struct tgsi_instruction *instruction,
1150    struct tgsi_header *header )
1151 {
1152    struct tgsi_src_register_ext_mod src_register_ext_mod;
1153
1154    assert( complement <= 1 );
1155    assert( bias <= 1 );
1156    assert( scale_2x <= 1 );
1157    assert( absolute <= 1 );
1158    assert( negate <= 1 );
1159
1160    src_register_ext_mod = tgsi_default_src_register_ext_mod();
1161    src_register_ext_mod.Complement = complement;
1162    src_register_ext_mod.Bias = bias;
1163    src_register_ext_mod.Scale2X = scale_2x;
1164    src_register_ext_mod.Absolute = absolute;
1165    src_register_ext_mod.Negate = negate;
1166
1167    prev_token->Extended = 1;
1168    instruction_grow( instruction, header );
1169
1170    return src_register_ext_mod;
1171 }
1172
1173 struct tgsi_dimension
1174 tgsi_default_dimension( void )
1175 {
1176    struct tgsi_dimension dimension;
1177
1178    dimension.Indirect = 0;
1179    dimension.Dimension = 0;
1180    dimension.Padding = 0;
1181    dimension.Index = 0;
1182    dimension.Extended = 0;
1183
1184    return dimension;
1185 }
1186
1187 struct tgsi_dimension
1188 tgsi_build_dimension(
1189    unsigned indirect,
1190    unsigned index,
1191    struct tgsi_instruction *instruction,
1192    struct tgsi_header *header )
1193 {
1194    struct tgsi_dimension dimension;
1195
1196    dimension = tgsi_default_dimension();
1197    dimension.Indirect = indirect;
1198    dimension.Index = index;
1199
1200    instruction_grow( instruction, header );
1201
1202    return dimension;
1203 }
1204
1205 struct tgsi_dst_register
1206 tgsi_default_dst_register( void )
1207 {
1208    struct tgsi_dst_register dst_register;
1209
1210    dst_register.File = TGSI_FILE_NULL;
1211    dst_register.WriteMask = TGSI_WRITEMASK_XYZW;
1212    dst_register.Indirect = 0;
1213    dst_register.Dimension = 0;
1214    dst_register.Index = 0;
1215    dst_register.Padding = 0;
1216    dst_register.Extended = 0;
1217
1218    return dst_register;
1219 }
1220
1221 struct tgsi_dst_register
1222 tgsi_build_dst_register(
1223    unsigned file,
1224    unsigned mask,
1225    unsigned indirect,
1226    int index,
1227    struct tgsi_instruction *instruction,
1228    struct tgsi_header *header )
1229 {
1230    struct tgsi_dst_register dst_register;
1231
1232    assert( file < TGSI_FILE_COUNT );
1233    assert( mask <= TGSI_WRITEMASK_XYZW );
1234    assert( index >= -32768 && index <= 32767 );
1235
1236    dst_register = tgsi_default_dst_register();
1237    dst_register.File = file;
1238    dst_register.WriteMask = mask;
1239    dst_register.Index = index;
1240    dst_register.Indirect = indirect;
1241
1242    instruction_grow( instruction, header );
1243
1244    return dst_register;
1245 }
1246
1247 struct tgsi_full_dst_register
1248 tgsi_default_full_dst_register( void )
1249 {
1250    struct tgsi_full_dst_register full_dst_register;
1251
1252    full_dst_register.DstRegister = tgsi_default_dst_register();
1253    full_dst_register.DstRegisterInd = tgsi_default_src_register();
1254    full_dst_register.DstRegisterExtConcode =
1255       tgsi_default_dst_register_ext_concode();
1256    full_dst_register.DstRegisterExtModulate =
1257       tgsi_default_dst_register_ext_modulate();
1258
1259    return full_dst_register;
1260 }
1261
1262 struct tgsi_dst_register_ext_concode
1263 tgsi_default_dst_register_ext_concode( void )
1264 {
1265    struct tgsi_dst_register_ext_concode dst_register_ext_concode;
1266
1267    dst_register_ext_concode.Type = TGSI_DST_REGISTER_EXT_TYPE_CONDCODE;
1268    dst_register_ext_concode.CondMask = TGSI_CC_TR;
1269    dst_register_ext_concode.CondSwizzleX = TGSI_SWIZZLE_X;
1270    dst_register_ext_concode.CondSwizzleY = TGSI_SWIZZLE_Y;
1271    dst_register_ext_concode.CondSwizzleZ = TGSI_SWIZZLE_Z;
1272    dst_register_ext_concode.CondSwizzleW = TGSI_SWIZZLE_W;
1273    dst_register_ext_concode.CondSrcIndex = 0;
1274    dst_register_ext_concode.Padding = 0;
1275    dst_register_ext_concode.Extended = 0;
1276
1277    return dst_register_ext_concode;
1278 }
1279
1280 unsigned
1281 tgsi_compare_dst_register_ext_concode(
1282    struct tgsi_dst_register_ext_concode a,
1283    struct tgsi_dst_register_ext_concode b )
1284 {
1285    a.Padding = b.Padding = 0;
1286    a.Extended = b.Extended = 0;
1287    return compare32(&a, &b);
1288 }
1289
1290 struct tgsi_dst_register_ext_concode
1291 tgsi_build_dst_register_ext_concode(
1292    unsigned cc,
1293    unsigned swizzle_x,
1294    unsigned swizzle_y,
1295    unsigned swizzle_z,
1296    unsigned swizzle_w,
1297    int index,
1298    struct tgsi_token *prev_token,
1299    struct tgsi_instruction *instruction,
1300    struct tgsi_header *header )
1301 {
1302    struct tgsi_dst_register_ext_concode dst_register_ext_concode;
1303
1304    assert( cc <= TGSI_CC_FL );
1305    assert( swizzle_x <= TGSI_SWIZZLE_W );
1306    assert( swizzle_y <= TGSI_SWIZZLE_W );
1307    assert( swizzle_z <= TGSI_SWIZZLE_W );
1308    assert( swizzle_w <= TGSI_SWIZZLE_W );
1309    assert( index >= -32768 && index <= 32767 );
1310
1311    dst_register_ext_concode = tgsi_default_dst_register_ext_concode();
1312    dst_register_ext_concode.CondMask = cc;
1313    dst_register_ext_concode.CondSwizzleX = swizzle_x;
1314    dst_register_ext_concode.CondSwizzleY = swizzle_y;
1315    dst_register_ext_concode.CondSwizzleZ = swizzle_z;
1316    dst_register_ext_concode.CondSwizzleW = swizzle_w;
1317    dst_register_ext_concode.CondSrcIndex = index;
1318
1319    prev_token->Extended = 1;
1320    instruction_grow( instruction, header );
1321
1322    return dst_register_ext_concode;
1323 }
1324
1325 struct tgsi_dst_register_ext_modulate
1326 tgsi_default_dst_register_ext_modulate( void )
1327 {
1328    struct tgsi_dst_register_ext_modulate dst_register_ext_modulate;
1329
1330    dst_register_ext_modulate.Type = TGSI_DST_REGISTER_EXT_TYPE_MODULATE;
1331    dst_register_ext_modulate.Modulate = TGSI_MODULATE_1X;
1332    dst_register_ext_modulate.Padding = 0;
1333    dst_register_ext_modulate.Extended = 0;
1334
1335    return dst_register_ext_modulate;
1336 }
1337
1338 unsigned
1339 tgsi_compare_dst_register_ext_modulate(
1340    struct tgsi_dst_register_ext_modulate a,
1341    struct tgsi_dst_register_ext_modulate b )
1342 {
1343    a.Padding = b.Padding = 0;
1344    a.Extended = b.Extended = 0;
1345    return compare32(&a, &b);
1346 }
1347
1348 struct tgsi_dst_register_ext_modulate
1349 tgsi_build_dst_register_ext_modulate(
1350    unsigned modulate,
1351    struct tgsi_token *prev_token,
1352    struct tgsi_instruction *instruction,
1353    struct tgsi_header *header )
1354 {
1355    struct tgsi_dst_register_ext_modulate dst_register_ext_modulate;
1356
1357    assert( modulate <= TGSI_MODULATE_EIGHTH );
1358
1359    dst_register_ext_modulate = tgsi_default_dst_register_ext_modulate();
1360    dst_register_ext_modulate.Modulate = modulate;
1361
1362    prev_token->Extended = 1;
1363    instruction_grow( instruction, header );
1364
1365    return dst_register_ext_modulate;
1366 }