summaryrefslogtreecommitdiff
path: root/src/gallium/auxiliary/tgsi/tgsi_build.c
blob: 92903fe57f38f8b6979e553ad2a9ed2be54d4ce9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
/**************************************************************************
 * 
 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/

#include "util/u_debug.h"
#include "pipe/p_shader_tokens.h"
#include "tgsi_build.h"
#include "tgsi_parse.h"


/*
 * header
 */

struct tgsi_header
tgsi_build_header( void )
{
   struct tgsi_header header;

   header.HeaderSize = 1;
   header.BodySize = 0;

   return header;
}

static void
header_headersize_grow( struct tgsi_header *header )
{
   assert( header->HeaderSize < 0xFF );
   assert( header->BodySize == 0 );

   header->HeaderSize++;
}

static void
header_bodysize_grow( struct tgsi_header *header )
{
   assert( header->BodySize < 0xFFFFFF );

   header->BodySize++;
}

struct tgsi_processor
tgsi_default_processor( void )
{
   struct tgsi_processor processor;

   processor.Processor = TGSI_PROCESSOR_FRAGMENT;
   processor.Padding = 0;

   return processor;
}

struct tgsi_processor
tgsi_build_processor(
   unsigned type,
   struct tgsi_header *header )
{
   struct tgsi_processor processor;

   processor = tgsi_default_processor();
   processor.Processor = type;

   header_headersize_grow( header );

   return processor;
}

/*
 * declaration
 */

struct tgsi_declaration
tgsi_default_declaration( void )
{
   struct tgsi_declaration declaration;

   declaration.Type = TGSI_TOKEN_TYPE_DECLARATION;
   declaration.NrTokens = 1;
   declaration.File = TGSI_FILE_NULL;
   declaration.UsageMask = TGSI_WRITEMASK_XYZW;
   declaration.Interpolate = TGSI_INTERPOLATE_CONSTANT;
   declaration.Semantic = 0;
   declaration.Centroid = 0;
   declaration.Invariant = 0;
   declaration.Padding = 0;

   return declaration;
}

struct tgsi_declaration
tgsi_build_declaration(
   unsigned file,
   unsigned usage_mask,
   unsigned interpolate,
   unsigned semantic,
   unsigned centroid,
   unsigned invariant,
   struct tgsi_header *header )
{
   struct tgsi_declaration declaration;

   assert( file < TGSI_FILE_COUNT );
   assert( interpolate < TGSI_INTERPOLATE_COUNT );

   declaration = tgsi_default_declaration();
   declaration.File = file;
   declaration.UsageMask = usage_mask;
   declaration.Interpolate = interpolate;
   declaration.Semantic = semantic;
   declaration.Centroid = centroid;
   declaration.Invariant = invariant;

   header_bodysize_grow( header );

   return declaration;
}

static void
declaration_grow(
   struct tgsi_declaration *declaration,
   struct tgsi_header *header )
{
   assert( declaration->NrTokens < 0xFF );

   declaration->NrTokens++;

   header_bodysize_grow( header );
}

struct tgsi_full_declaration
tgsi_default_full_declaration( void )
{
   struct tgsi_full_declaration  full_declaration;

   full_declaration.Declaration  = tgsi_default_declaration();
   full_declaration.Range = tgsi_default_declaration_range();
   full_declaration.Semantic = tgsi_default_declaration_semantic();

   return full_declaration;
}

unsigned
tgsi_build_full_declaration(
   const struct tgsi_full_declaration *full_decl,
   struct tgsi_token *tokens,
   struct tgsi_header *header,
   unsigned maxsize )
{
   unsigned size = 0;
   struct tgsi_declaration *declaration;
   struct tgsi_declaration_range *dr;

   if( maxsize <= size )
     return 0;
   declaration = (struct tgsi_declaration *) &tokens[size];
   size++;

   *declaration = tgsi_build_declaration(
      full_decl->Declaration.File,
      full_decl->Declaration.UsageMask,
      full_decl->Declaration.Interpolate,
      full_decl->Declaration.Semantic,
      full_decl->Declaration.Centroid,
      full_decl->Declaration.Invariant,
      header );

   if (maxsize <= size)
      return 0;
   dr = (struct tgsi_declaration_range *) &tokens[size];
   size++;

   *dr = tgsi_build_declaration_range(
      full_decl->Range.First,
      full_decl->Range.Last,
      declaration,
      header );

   if( full_decl->Declaration.Semantic ) {
      struct tgsi_declaration_semantic *ds;

      if( maxsize <= size )
         return  0;
      ds = (struct tgsi_declaration_semantic *) &tokens[size];
      size++;

      *ds = tgsi_build_declaration_semantic(
         full_decl->Semantic.Name,
         full_decl->Semantic.Index,
         declaration,
         header );
   }

   return size;
}

struct tgsi_declaration_range
tgsi_default_declaration_range( void )
{
   struct tgsi_declaration_range dr;

   dr.First = 0;
   dr.Last = 0;

   return dr;
}

struct tgsi_declaration_range
tgsi_build_declaration_range(
   unsigned first,
   unsigned last,
   struct tgsi_declaration *declaration,
   struct tgsi_header *header )
{
   struct tgsi_declaration_range declaration_range;

   assert( last >= first );
   assert( last <= 0xFFFF );

   declaration_range = tgsi_default_declaration_range();
   declaration_range.First = first;
   declaration_range.Last = last;

   declaration_grow( declaration, header );

   return declaration_range;
}

struct tgsi_declaration_semantic
tgsi_default_declaration_semantic( void )
{
   struct tgsi_declaration_semantic ds;

   ds.Name = TGSI_SEMANTIC_POSITION;
   ds.Index = 0;
   ds.Padding = 0;

   return ds;
}

struct tgsi_declaration_semantic
tgsi_build_declaration_semantic(
   unsigned semantic_name,
   unsigned semantic_index,
   struct tgsi_declaration *declaration,
   struct tgsi_header *header )
{
   struct tgsi_declaration_semantic ds;

   assert( semantic_name <= TGSI_SEMANTIC_COUNT );
   assert( semantic_index <= 0xFFFF );

   ds = tgsi_default_declaration_semantic();
   ds.Name = semantic_name;
   ds.Index = semantic_index;

   declaration_grow( declaration, header );

   return ds;
}

/*
 * immediate
 */

struct tgsi_immediate
tgsi_default_immediate( void )
{
   struct tgsi_immediate immediate;

   immediate.Type = TGSI_TOKEN_TYPE_IMMEDIATE;
   immediate.NrTokens = 1;
   immediate.DataType = TGSI_IMM_FLOAT32;
   immediate.Padding = 0;

   return immediate;
}

struct tgsi_immediate
tgsi_build_immediate(
   struct tgsi_header *header )
{
   struct tgsi_immediate immediate;

   immediate = tgsi_default_immediate();

   header_bodysize_grow( header );

   return immediate;
}

struct tgsi_full_immediate
tgsi_default_full_immediate( void )
{
   struct tgsi_full_immediate fullimm;

   fullimm.Immediate = tgsi_default_immediate();
   fullimm.u[0].Float = 0.0f;
   fullimm.u[1].Float = 0.0f;
   fullimm.u[2].Float = 0.0f;
   fullimm.u[3].Float = 0.0f;

   return fullimm;
}

static void
immediate_grow(
   struct tgsi_immediate *immediate,
   struct tgsi_header *header )
{
   assert( immediate->NrTokens < 0xFF );

   immediate->NrTokens++;

   header_bodysize_grow( header );
}

union tgsi_immediate_data
tgsi_build_immediate_float32(
   float value,
   struct tgsi_immediate *immediate,
   struct tgsi_header *header )
{
   union tgsi_immediate_data immediate_data;

   immediate_data.Float = value;

   immediate_grow( immediate, header );

   return immediate_data;
}

unsigned
tgsi_build_full_immediate(
   const struct tgsi_full_immediate *full_imm,
   struct tgsi_token *tokens,
   struct tgsi_header *header,
   unsigned maxsize )
{
   unsigned size = 0, i;
   struct tgsi_immediate *immediate;

   if( maxsize <= size )
      return 0;
   immediate = (struct tgsi_immediate *) &tokens[size];
   size++;

   *immediate = tgsi_build_immediate( header );

   assert( full_imm->Immediate.NrTokens <= 4 + 1 );

   for( i = 0; i < full_imm->Immediate.NrTokens - 1; i++ ) {
      union tgsi_immediate_data *data;

      if( maxsize <= size )
         return  0;
      data = (union tgsi_immediate_data *) &tokens[size];
      size++;

      *data = tgsi_build_immediate_float32(
         full_imm->u[i].Float,
         immediate,
         header );
   }

   return size;
}

/*
 * instruction
 */

struct tgsi_instruction
tgsi_default_instruction( void )
{
   struct tgsi_instruction instruction;

   instruction.Type = TGSI_TOKEN_TYPE_INSTRUCTION;
   instruction.NrTokens = 0;
   instruction.Opcode = TGSI_OPCODE_MOV;
   instruction.Saturate = TGSI_SAT_NONE;
   instruction.Predicate = 0;
   instruction.NumDstRegs = 1;
   instruction.NumSrcRegs = 1;
   instruction.Label = 0;
   instruction.Texture = 0;
   instruction.Padding  = 0;

   return instruction;
}

struct tgsi_instruction
tgsi_build_instruction(unsigned opcode,
                       unsigned saturate,
                       unsigned predicate,
                       unsigned num_dst_regs,
                       unsigned num_src_regs,
                       struct tgsi_header *header)
{
   struct tgsi_instruction instruction;

   assert (opcode <= TGSI_OPCODE_LAST);
   assert (saturate <= TGSI_SAT_MINUS_PLUS_ONE);
   assert (num_dst_regs <= 3);
   assert (num_src_regs <= 15);

   instruction = tgsi_default_instruction();
   instruction.Opcode = opcode;
   instruction.Saturate = saturate;
   instruction.Predicate = predicate;
   instruction.NumDstRegs = num_dst_regs;
   instruction.NumSrcRegs = num_src_regs;

   header_bodysize_grow( header );

   return instruction;
}

static void
instruction_grow(
   struct tgsi_instruction *instruction,
   struct tgsi_header *header )
{
   assert (instruction->NrTokens <   0xFF);

   instruction->NrTokens++;

   header_bodysize_grow( header );
}

struct tgsi_full_instruction
tgsi_default_full_instruction( void )
{
   struct tgsi_full_instruction full_instruction;
   unsigned i;

   full_instruction.Instruction = tgsi_default_instruction();
   full_instruction.Predicate = tgsi_default_instruction_predicate();
   full_instruction.Label = tgsi_default_instruction_label();
   full_instruction.Texture = tgsi_default_instruction_texture();
   for( i = 0;  i < TGSI_FULL_MAX_DST_REGISTERS; i++ ) {
      full_instruction.Dst[i] = tgsi_default_full_dst_register();
   }
   for( i = 0;  i < TGSI_FULL_MAX_SRC_REGISTERS; i++ ) {
      full_instruction.Src[i] = tgsi_default_full_src_register();
   }

   return full_instruction;
}

unsigned
tgsi_build_full_instruction(
   const struct tgsi_full_instruction *full_inst,
   struct  tgsi_token *tokens,
   struct  tgsi_header *header,
   unsigned  maxsize )
{
   unsigned size = 0;
   unsigned i;
   struct tgsi_instruction *instruction;
   struct tgsi_token *prev_token;

   if( maxsize <= size )
      return 0;
   instruction = (struct tgsi_instruction *) &tokens[size];
   size++;

   *instruction = tgsi_build_instruction(full_inst->Instruction.Opcode,
                                         full_inst->Instruction.Saturate,
                                         full_inst->Instruction.Predicate,
                                         full_inst->Instruction.NumDstRegs,
                                         full_inst->Instruction.NumSrcRegs,
                                         header);
   prev_token = (struct tgsi_token  *) instruction;

   if (full_inst->Instruction.Predicate) {
      struct tgsi_instruction_predicate *instruction_predicate;

      if (maxsize <= size) {
         return 0;
      }
      instruction_predicate = (struct tgsi_instruction_predicate *)&tokens[size];
      size++;

      *instruction_predicate =
         tgsi_build_instruction_predicate(full_inst->Predicate.Index,
                                          full_inst->Predicate.Negate,
                                          full_inst->Predicate.SwizzleX,
                                          full_inst->Predicate.SwizzleY,
                                          full_inst->Predicate.SwizzleZ,
                                          full_inst->Predicate.SwizzleW,
                                          instruction,
                                          header);
   }

   if (full_inst->Instruction.Label) {
      struct tgsi_instruction_label *instruction_label;

      if( maxsize <= size )
         return 0;
      instruction_label =
         (struct  tgsi_instruction_label *) &tokens[size];
      size++;

      *instruction_label = tgsi_build_instruction_label(
         full_inst->Label.Label,
         prev_token,
         instruction,
         header );
      prev_token = (struct tgsi_token  *) instruction_label;
   }

   if (full_inst->Instruction.Texture) {
      struct tgsi_instruction_texture *instruction_texture;

      if( maxsize <= size )
         return 0;
      instruction_texture =
         (struct  tgsi_instruction_texture *) &tokens[size];
      size++;

      *instruction_texture = tgsi_build_instruction_texture(
         full_inst->Texture.Texture,
         prev_token,
         instruction,
         header   );
      prev_token = (struct tgsi_token  *) instruction_texture;
   }

   for( i = 0;  i <   full_inst->Instruction.NumDstRegs; i++ ) {
      const struct tgsi_full_dst_register *reg = &full_inst->Dst[i];
      struct tgsi_dst_register *dst_register;
      struct tgsi_token *prev_token;

      if( maxsize <= size )
         return 0;
      dst_register = (struct tgsi_dst_register *) &tokens[size];
      size++;

      *dst_register = tgsi_build_dst_register(
         reg->Register.File,
         reg->Register.WriteMask,
         reg->Register.Indirect,
         reg->Register.Index,
         instruction,
         header );
      prev_token = (struct tgsi_token  *) dst_register;

      if( reg->Register.Indirect ) {
         struct tgsi_src_register *ind;

         if( maxsize <= size )
            return 0;
         ind = (struct tgsi_src_register *) &tokens[size];
         size++;

         *ind = tgsi_build_src_register(
            reg->Indirect.File,
            reg->Indirect.SwizzleX,
            reg->Indirect.SwizzleY,
            reg->Indirect.SwizzleZ,
            reg->Indirect.SwizzleW,
            reg->Indirect.Negate,
            reg->Indirect.Absolute,
            reg->Indirect.Indirect,
            reg->Indirect.Dimension,
            reg->Indirect.Index,
            instruction,
            header );
      }
   }

   for( i = 0;  i < full_inst->Instruction.NumSrcRegs; i++ ) {
      const struct tgsi_full_src_register *reg = &full_inst->Src[i];
      struct tgsi_src_register *src_register;
      struct tgsi_token *prev_token;

      if( maxsize <= size )
         return 0;
      src_register = (struct tgsi_src_register *)  &tokens[size];
      size++;

      *src_register = tgsi_build_src_register(
         reg->Register.File,
         reg->Register.SwizzleX,
         reg->Register.SwizzleY,
         reg->Register.SwizzleZ,
         reg->Register.SwizzleW,
         reg->Register.Negate,
         reg->Register.Absolute,
         reg->Register.Indirect,
         reg->Register.Dimension,
         reg->Register.Index,
         instruction,
         header );
      prev_token = (struct tgsi_token  *) src_register;

      if( reg->Register.Indirect ) {
         struct  tgsi_src_register *ind;

         if( maxsize <= size )
            return 0;
         ind = (struct tgsi_src_register *) &tokens[size];
         size++;

         *ind = tgsi_build_src_register(
            reg->Indirect.File,
            reg->Indirect.SwizzleX,
            reg->Indirect.SwizzleY,
            reg->Indirect.SwizzleZ,
            reg->Indirect.SwizzleW,
            reg->Indirect.Negate,
            reg->Indirect.Absolute,
            reg->Indirect.Indirect,
            reg->Indirect.Dimension,
            reg->Indirect.Index,
            instruction,
            header );
      }

      if( reg->Register.Dimension ) {
         struct  tgsi_dimension *dim;

         assert( !reg->Dimension.Dimension );

         if( maxsize <= size )
            return 0;
         dim = (struct tgsi_dimension *) &tokens[size];
         size++;

         *dim = tgsi_build_dimension(
            reg->Dimension.Indirect,
            reg->Dimension.Index,
            instruction,
            header );

         if( reg->Dimension.Indirect ) {
            struct tgsi_src_register *ind;

            if( maxsize <= size )
               return 0;
            ind = (struct tgsi_src_register *) &tokens[size];
            size++;

            *ind = tgsi_build_src_register(
               reg->DimIndirect.File,
               reg->DimIndirect.SwizzleX,
               reg->DimIndirect.SwizzleY,
               reg->DimIndirect.SwizzleZ,
               reg->DimIndirect.SwizzleW,
               reg->DimIndirect.Negate,
               reg->DimIndirect.Absolute,
               reg->DimIndirect.Indirect,
               reg->DimIndirect.Dimension,
               reg->DimIndirect.Index,
               instruction,
               header );
         }
      }
   }

   return size;
}

struct tgsi_instruction_predicate
tgsi_default_instruction_predicate(void)
{
   struct tgsi_instruction_predicate instruction_predicate;

   instruction_predicate.SwizzleX = TGSI_SWIZZLE_X;
   instruction_predicate.SwizzleY = TGSI_SWIZZLE_Y;
   instruction_predicate.SwizzleZ = TGSI_SWIZZLE_Z;
   instruction_predicate.SwizzleW = TGSI_SWIZZLE_W;
   instruction_predicate.Negate = 0;
   instruction_predicate.Index = 0;
   instruction_predicate.Padding = 0;

   return instruction_predicate;
}

struct tgsi_instruction_predicate
tgsi_build_instruction_predicate(int index,
                                 unsigned negate,
                                 unsigned swizzleX,
                                 unsigned swizzleY,
                                 unsigned swizzleZ,
                                 unsigned swizzleW,
                                 struct tgsi_instruction *instruction,
                                 struct tgsi_header *header)
{
   struct tgsi_instruction_predicate instruction_predicate;

   instruction_predicate = tgsi_default_instruction_predicate();
   instruction_predicate.SwizzleX = swizzleX;
   instruction_predicate.SwizzleY = swizzleY;
   instruction_predicate.SwizzleZ = swizzleZ;
   instruction_predicate.SwizzleW = swizzleW;
   instruction_predicate.Negate = negate;
   instruction_predicate.Index = index;

   instruction_grow(instruction, header);

   return instruction_predicate;
}

struct tgsi_instruction_label
tgsi_default_instruction_label( void )
{
   struct tgsi_instruction_label instruction_label;

   instruction_label.Label = 0;
   instruction_label.Padding = 0;

   return instruction_label;
}

struct tgsi_instruction_label
tgsi_build_instruction_label(
   unsigned label,
   struct tgsi_token  *prev_token,
   struct tgsi_instruction *instruction,
   struct tgsi_header *header )
{
   struct tgsi_instruction_label instruction_label;

   instruction_label = tgsi_default_instruction_label();
   instruction_label.Label = label;
   instruction->Label = 1;

   instruction_grow( instruction, header );

   return instruction_label;
}

struct tgsi_instruction_texture
tgsi_default_instruction_texture( void )
{
   struct tgsi_instruction_texture instruction_texture;

   instruction_texture.Texture = TGSI_TEXTURE_UNKNOWN;
   instruction_texture.Padding = 0;

   return instruction_texture;
}

struct tgsi_instruction_texture
tgsi_build_instruction_texture(
   unsigned texture,
   struct tgsi_token *prev_token,
   struct tgsi_instruction *instruction,
   struct tgsi_header *header )
{
   struct tgsi_instruction_texture instruction_texture;

   instruction_texture = tgsi_default_instruction_texture();
   instruction_texture.Texture = texture;
   instruction->Texture = 1;

   instruction_grow( instruction, header );

   return instruction_texture;
}

struct tgsi_src_register
tgsi_default_src_register( void )
{
   struct tgsi_src_register src_register;

   src_register.File = TGSI_FILE_NULL;
   src_register.SwizzleX = TGSI_SWIZZLE_X;
   src_register.SwizzleY = TGSI_SWIZZLE_Y;
   src_register.SwizzleZ = TGSI_SWIZZLE_Z;
   src_register.SwizzleW = TGSI_SWIZZLE_W;
   src_register.Negate = 0;
   src_register.Absolute = 0;
   src_register.Indirect = 0;
   src_register.Dimension = 0;
   src_register.Index = 0;

   return src_register;
}

struct tgsi_src_register
tgsi_build_src_register(
   unsigned file,
   unsigned swizzle_x,
   unsigned swizzle_y,
   unsigned swizzle_z,
   unsigned swizzle_w,
   unsigned negate,
   unsigned absolute,
   unsigned indirect,
   unsigned dimension,
   int index,
   struct tgsi_instruction *instruction,
   struct tgsi_header *header )
{
   struct tgsi_src_register   src_register;

   assert( file < TGSI_FILE_COUNT );
   assert( swizzle_x <= TGSI_SWIZZLE_W );
   assert( swizzle_y <= TGSI_SWIZZLE_W );
   assert( swizzle_z <= TGSI_SWIZZLE_W );
   assert( swizzle_w <= TGSI_SWIZZLE_W );
   assert( negate <= 1 );
   assert( index >= -0x8000 && index <= 0x7FFF );

   src_register = tgsi_default_src_register();
   src_register.File = file;
   src_register.SwizzleX = swizzle_x;
   src_register.SwizzleY = swizzle_y;
   src_register.SwizzleZ = swizzle_z;
   src_register.SwizzleW = swizzle_w;
   src_register.Negate = negate;
   src_register.Absolute = absolute;
   src_register.Indirect = indirect;
   src_register.Dimension = dimension;
   src_register.Index = index;

   instruction_grow( instruction, header );

   return src_register;
}

struct tgsi_full_src_register
tgsi_default_full_src_register( void )
{
   struct tgsi_full_src_register full_src_register;

   full_src_register.Register = tgsi_default_src_register();
   full_src_register.Indirect = tgsi_default_src_register();
   full_src_register.Dimension = tgsi_default_dimension();
   full_src_register.DimIndirect = tgsi_default_src_register();

   return full_src_register;
}


struct tgsi_dimension
tgsi_default_dimension( void )
{
   struct tgsi_dimension dimension;

   dimension.Indirect = 0;
   dimension.Dimension = 0;
   dimension.Padding = 0;
   dimension.Index = 0;

   return dimension;
}

struct tgsi_dimension
tgsi_build_dimension(
   unsigned indirect,
   unsigned index,
   struct tgsi_instruction *instruction,
   struct tgsi_header *header )
{
   struct tgsi_dimension dimension;

   dimension = tgsi_default_dimension();
   dimension.Indirect = indirect;
   dimension.Index = index;

   instruction_grow( instruction, header );

   return dimension;
}

struct tgsi_dst_register
tgsi_default_dst_register( void )
{
   struct tgsi_dst_register dst_register;

   dst_register.File = TGSI_FILE_NULL;
   dst_register.WriteMask = TGSI_WRITEMASK_XYZW;
   dst_register.Indirect = 0;
   dst_register.Dimension = 0;
   dst_register.Index = 0;
   dst_register.Padding = 0;

   return dst_register;
}

struct tgsi_dst_register
tgsi_build_dst_register(
   unsigned file,
   unsigned mask,
   unsigned indirect,
   int index,
   struct tgsi_instruction *instruction,
   struct tgsi_header *header )
{
   struct tgsi_dst_register dst_register;

   assert( file < TGSI_FILE_COUNT );
   assert( mask <= TGSI_WRITEMASK_XYZW );
   assert( index >= -32768 && index <= 32767 );

   dst_register = tgsi_default_dst_register();
   dst_register.File = file;
   dst_register.WriteMask = mask;
   dst_register.Index = index;
   dst_register.Indirect = indirect;

   instruction_grow( instruction, header );

   return dst_register;
}

struct tgsi_full_dst_register
tgsi_default_full_dst_register( void )
{
   struct tgsi_full_dst_register full_dst_register;

   full_dst_register.Register = tgsi_default_dst_register();
   full_dst_register.Indirect = tgsi_default_src_register();

   return full_dst_register;
}

struct tgsi_property
tgsi_default_property( void )
{
   struct tgsi_property property;

   property.Type = TGSI_TOKEN_TYPE_PROPERTY;
   property.NrTokens = 1;
   property.PropertyName = TGSI_PROPERTY_GS_INPUT_PRIM;
   property.Padding = 0;

   return property;
}

struct tgsi_property
tgsi_build_property(unsigned property_name,
                    struct tgsi_header *header)
{
   struct tgsi_property property;

   property = tgsi_default_property();
   property.PropertyName = property_name;

   header_bodysize_grow( header );

   return property;
}


struct tgsi_full_property
tgsi_default_full_property( void )
{
   struct tgsi_full_property  full_property;

   full_property.Property  = tgsi_default_property();
   memset(full_property.u, 0,
          sizeof(struct tgsi_property_data) * 8);

   return full_property;
}

static void
property_grow(
   struct tgsi_property *property,
   struct tgsi_header *header )
{
   assert( property->NrTokens < 0xFF );

   property->NrTokens++;

   header_bodysize_grow( header );
}

struct tgsi_property_data
tgsi_build_property_data(
   unsigned value,
   struct tgsi_property *property,
   struct tgsi_header *header )
{
   struct tgsi_property_data property_data;

   property_data.Data = value;

   property_grow( property, header );

   return property_data;
}

unsigned
tgsi_build_full_property(
   const struct tgsi_full_property *full_prop,
   struct tgsi_token *tokens,
   struct tgsi_header *header,
   unsigned maxsize )
{
   unsigned size = 0, i;
   struct tgsi_property *property;

   if( maxsize <= size )
      return 0;
   property = (struct tgsi_property *) &tokens[size];
   size++;

   *property = tgsi_build_property(
      TGSI_PROPERTY_GS_INPUT_PRIM,
      header );

   assert( full_prop->Property.NrTokens <= 8 + 1 );

   for( i = 0; i < full_prop->Property.NrTokens - 1; i++ ) {
      struct tgsi_property_data *data;

      if( maxsize <= size )
         return  0;
      data = (struct tgsi_property_data *) &tokens[size];
      size++;

      *data = tgsi_build_property_data(
         full_prop->u[i].Data,
         property,
         header );
   }

   return size;
}