src/gallium/auxiliary/tgsi/tgsi_dump.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007-2008 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 "util/u_string.h"
  30 #include "util/u_math.h"
  31 #include "util/u_memory.h"
  32 #include "tgsi_dump.h"
  33 #include "tgsi_info.h"
  34 #include "tgsi_iterate.h"
  35
  36
  37 /** Number of spaces to indent for IF/LOOP/etc */
  38 static const int indent_spaces = 3;
  39
  40
  41 struct dump_ctx
  42 {
  43    struct tgsi_iterate_context iter;
  44
  45    uint instno;
  46    int indent;
  47
  48    uint indentation;
  49
  50    void (*printf)(struct dump_ctx *ctx, const char *format, ...);
  51 };
  52
  53 static void
  54 dump_ctx_printf(struct dump_ctx *ctx, const char *format, ...)
  55 {
  56    va_list ap;
  57    (void)ctx;
  58    va_start(ap, format);
  59    _debug_vprintf(format, ap);
  60    va_end(ap);
  61 }
  62
  63 static void
  64 dump_enum(
  65    struct dump_ctx *ctx,
  66    uint e,
  67    const char **enums,
  68    uint enum_count )
  69 {
  70    if (e >= enum_count)
  71       ctx->printf( ctx, "%u", e );
  72    else
  73       ctx->printf( ctx, "%s", enums[e] );
  74 }
  75
  76 #define EOL()           ctx->printf( ctx, "\n" )
  77 #define TXT(S)          ctx->printf( ctx, "%s", S )
  78 #define CHR(C)          ctx->printf( ctx, "%c", C )
  79 #define UIX(I)          ctx->printf( ctx, "0x%x", I )
  80 #define UID(I)          ctx->printf( ctx, "%u", I )
  81 #define INSTID(I)          ctx->printf( ctx, "% 3u", I )
  82 #define SID(I)          ctx->printf( ctx, "%d", I )
  83 #define FLT(F)          ctx->printf( ctx, "%10.4f", F )
  84 #define ENM(E,ENUMS)    dump_enum( ctx, E, ENUMS, sizeof( ENUMS ) / sizeof( *ENUMS ) )
  85
  86 static const char *processor_type_names[] =
  87 {
  88    "FRAG",
  89    "VERT",
  90    "GEOM"
  91 };
  92
  93 const char *
  94 tgsi_file_names[TGSI_FILE_COUNT] =
  95 {
  96    "NULL",
  97    "CONST",
  98    "IN",
  99    "OUT",
 100    "TEMP",
 101    "SAMP",
 102    "ADDR",
 103    "IMM",
 104    "PRED",
 105    "SV",
 106    "IMMX",
 107    "TEMPX"
 108 };
 109
 110 static const char *interpolate_names[] =
 111 {
 112    "CONSTANT",
 113    "LINEAR",
 114    "PERSPECTIVE"
 115 };
 116
 117 static const char *semantic_names[] =
 118 {
 119    "POSITION",
 120    "COLOR",
 121    "BCOLOR",
 122    "FOG",
 123    "PSIZE",
 124    "GENERIC",
 125    "NORMAL",
 126    "FACE",
 127    "EDGEFLAG",
 128    "PRIM_ID",
 129    "INSTANCEID",
 130    "STENCIL"
 131 };
 132
 133 static const char *immediate_type_names[] =
 134 {
 135    "FLT32",
 136    "UINT32",
 137    "INT32"
 138 };
 139
 140 const char *
 141 tgsi_swizzle_names[] =
 142 {
 143    "x",
 144    "y",
 145    "z",
 146    "w"
 147 };
 148
 149 const char *
 150 tgsi_texture_names[] =
 151 {
 152    "UNKNOWN",
 153    "1D",
 154    "2D",
 155    "3D",
 156    "CUBE",
 157    "RECT",
 158    "SHADOW1D",
 159    "SHADOW2D",
 160    "SHADOWRECT"
 161 };
 162
 163 static const char *property_names[] =
 164 {
 165    "GS_INPUT_PRIMITIVE",
 166    "GS_OUTPUT_PRIMITIVE",
 167    "GS_MAX_OUTPUT_VERTICES",
 168    "FS_COORD_ORIGIN",
 169    "FS_COORD_PIXEL_CENTER"
 170 };
 171
 172 static const char *primitive_names[] =
 173 {
 174    "POINTS",
 175    "LINES",
 176    "LINE_LOOP",
 177    "LINE_STRIP",
 178    "TRIANGLES",
 179    "TRIANGLE_STRIP",
 180    "TRIANGLE_FAN",
 181    "QUADS",
 182    "QUAD_STRIP",
 183    "POLYGON",
 184    "LINES_ADJACENCY",
 185    "LINE_STRIP_ADJACENCY",
 186    "TRIANGLES_ADJACENCY",
 187    "TRIANGLE_STRIP_ADJACENCY"
 188 };
 189
 190 static const char *fs_coord_origin_names[] =
 191 {
 192    "UPPER_LEFT",
 193    "LOWER_LEFT"
 194 };
 195
 196 static const char *fs_coord_pixel_center_names[] =
 197 {
 198    "HALF_INTEGER",
 199    "INTEGER"
 200 };
 201
 202
 203 static void
 204 _dump_register_src(
 205    struct dump_ctx *ctx,
 206    const struct tgsi_full_src_register *src )
 207 {
 208    ENM(src->Register.File, tgsi_file_names);
 209    if (src->Register.Dimension) {
 210       if (src->Dimension.Indirect) {
 211          CHR( '[' );
 212          ENM( src->DimIndirect.File, tgsi_file_names );
 213          CHR( '[' );
 214          SID( src->DimIndirect.Index );
 215          TXT( "]." );
 216          ENM( src->DimIndirect.SwizzleX, tgsi_swizzle_names );
 217          if (src->Dimension.Index != 0) {
 218             if (src->Dimension.Index > 0)
 219                CHR( '+' );
 220             SID( src->Dimension.Index );
 221          }
 222          CHR( ']' );
 223       } else {
 224          CHR('[');
 225          SID(src->Dimension.Index);
 226          CHR(']');
 227       }
 228    }
 229    if (src->Register.Indirect) {
 230       CHR( '[' );
 231       ENM( src->Indirect.File, tgsi_file_names );
 232       CHR( '[' );
 233       SID( src->Indirect.Index );
 234       TXT( "]." );
 235       ENM( src->Indirect.SwizzleX, tgsi_swizzle_names );
 236       if (src->Register.Index != 0) {
 237          if (src->Register.Index > 0)
 238             CHR( '+' );
 239          SID( src->Register.Index );
 240       }
 241       CHR( ']' );
 242    } else {
 243       CHR( '[' );
 244       SID( src->Register.Index );
 245       CHR( ']' );
 246    }
 247 }
 248
 249
 250 static void
 251 _dump_register_dst(
 252    struct dump_ctx *ctx,
 253    const struct tgsi_full_dst_register *dst )
 254 {
 255    ENM(dst->Register.File, tgsi_file_names);
 256    if (dst->Register.Dimension) {
 257       if (dst->Dimension.Indirect) {
 258          CHR( '[' );
 259          ENM( dst->DimIndirect.File, tgsi_file_names );
 260          CHR( '[' );
 261          SID( dst->DimIndirect.Index );
 262          TXT( "]." );
 263          ENM( dst->DimIndirect.SwizzleX, tgsi_swizzle_names );
 264          if (dst->Dimension.Index != 0) {
 265             if (dst->Dimension.Index > 0)
 266                CHR( '+' );
 267             SID( dst->Dimension.Index );
 268          }
 269          CHR( ']' );
 270       } else {
 271          CHR('[');
 272          SID(dst->Dimension.Index);
 273          CHR(']');
 274       }
 275    }
 276    if (dst->Register.Indirect) {
 277       CHR( '[' );
 278       ENM( dst->Indirect.File, tgsi_file_names );
 279       CHR( '[' );
 280       SID( dst->Indirect.Index );
 281       TXT( "]." );
 282       ENM( dst->Indirect.SwizzleX, tgsi_swizzle_names );
 283       if (dst->Register.Index != 0) {
 284          if (dst->Register.Index > 0)
 285             CHR( '+' );
 286          SID( dst->Register.Index );
 287       }
 288       CHR( ']' );
 289    } else {
 290       CHR( '[' );
 291       SID( dst->Register.Index );
 292       CHR( ']' );
 293    }
 294 }
 295 static void
 296 _dump_writemask(
 297    struct dump_ctx *ctx,
 298    uint writemask )
 299 {
 300    if (writemask != TGSI_WRITEMASK_XYZW) {
 301       CHR( '.' );
 302       if (writemask & TGSI_WRITEMASK_X)
 303          CHR( 'x' );
 304       if (writemask & TGSI_WRITEMASK_Y)
 305          CHR( 'y' );
 306       if (writemask & TGSI_WRITEMASK_Z)
 307          CHR( 'z' );
 308       if (writemask & TGSI_WRITEMASK_W)
 309          CHR( 'w' );
 310    }
 311 }
 312
 313 static void
 314 dump_imm_data(struct tgsi_iterate_context *iter,
 315               union tgsi_immediate_data *data,
 316               unsigned num_tokens,
 317               unsigned data_type)
 318 {
 319    struct dump_ctx *ctx = (struct dump_ctx *)iter;
 320    unsigned i ;
 321
 322    TXT( " {" );
 323
 324    assert( num_tokens <= 4 );
 325    for (i = 0; i < num_tokens; i++) {
 326       switch (data_type) {
 327       case TGSI_IMM_FLOAT32:
 328          FLT( data[i].Float );
 329          break;
 330       case TGSI_IMM_UINT32:
 331          UID(data[i].Uint);
 332          break;
 333       case TGSI_IMM_INT32:
 334          SID(data[i].Int);
 335          break;
 336       default:
 337          assert( 0 );
 338       }
 339
 340       if (i < num_tokens - 1)
 341          TXT( ", " );
 342    }
 343    TXT( "}" );
 344 }
 345
 346 static boolean
 347 iter_declaration(
 348    struct tgsi_iterate_context *iter,
 349    struct tgsi_full_declaration *decl )
 350 {
 351    struct dump_ctx *ctx = (struct dump_ctx *)iter;
 352
 353    assert(Elements(semantic_names) == TGSI_SEMANTIC_COUNT);
 354    assert(Elements(interpolate_names) == TGSI_INTERPOLATE_COUNT);
 355
 356    TXT( "DCL " );
 357
 358    ENM(decl->Declaration.File, tgsi_file_names);
 359
 360    /* all geometry shader inputs are two dimensional */
 361    if (decl->Declaration.File == TGSI_FILE_INPUT &&
 362        iter->processor.Processor == TGSI_PROCESSOR_GEOMETRY) {
 363       TXT("[]");
 364    }
 365
 366    if (decl->Declaration.Dimension) {
 367       CHR('[');
 368       SID(decl->Dim.Index2D);
 369       CHR(']');
 370    }
 371
 372    CHR('[');
 373    SID(decl->Range.First);
 374    if (decl->Range.First != decl->Range.Last) {
 375       TXT("..");
 376       SID(decl->Range.Last);
 377    }
 378    CHR(']');
 379
 380    _dump_writemask(
 381       ctx,
 382       decl->Declaration.UsageMask );
 383
 384    if (decl->Declaration.Semantic) {
 385       TXT( ", " );
 386       ENM( decl->Semantic.Name, semantic_names );
 387       if (decl->Semantic.Index != 0 ||
 388           decl->Semantic.Name == TGSI_SEMANTIC_GENERIC) {
 389          CHR( '[' );
 390          UID( decl->Semantic.Index );
 391          CHR( ']' );
 392       }
 393    }
 394
 395    if (iter->processor.Processor == TGSI_PROCESSOR_FRAGMENT &&
 396        decl->Declaration.File == TGSI_FILE_INPUT)
 397    {
 398       TXT( ", " );
 399       ENM( decl->Declaration.Interpolate, interpolate_names );
 400    }
 401
 402    if (decl->Declaration.Centroid) {
 403       TXT( ", CENTROID" );
 404    }
 405
 406    if (decl->Declaration.Invariant) {
 407       TXT( ", INVARIANT" );
 408    }
 409
 410    if (decl->Declaration.CylindricalWrap) {
 411       TXT(", CYLWRAP_");
 412       if (decl->Declaration.CylindricalWrap & TGSI_CYLINDRICAL_WRAP_X) {
 413          CHR('X');
 414       }
 415       if (decl->Declaration.CylindricalWrap & TGSI_CYLINDRICAL_WRAP_Y) {
 416          CHR('Y');
 417       }
 418       if (decl->Declaration.CylindricalWrap & TGSI_CYLINDRICAL_WRAP_Z) {
 419          CHR('Z');
 420       }
 421       if (decl->Declaration.CylindricalWrap & TGSI_CYLINDRICAL_WRAP_W) {
 422          CHR('W');
 423       }
 424    }
 425
 426    if (decl->Declaration.File == TGSI_FILE_IMMEDIATE_ARRAY) {
 427       unsigned i;
 428       char range_indent[4];
 429
 430       TXT(" {");
 431
 432       if (decl->Range.Last < 10)
 433          range_indent[0] = '\0';
 434       else if (decl->Range.Last < 100) {
 435          range_indent[0] = ' ';
 436          range_indent[1] = '\0';
 437       } else if (decl->Range.Last < 1000) {
 438          range_indent[0] = ' ';
 439          range_indent[1] = ' ';
 440          range_indent[2] = '\0';
 441       } else {
 442          range_indent[0] = ' ';
 443          range_indent[1] = ' ';
 444          range_indent[2] = ' ';
 445          range_indent[3] = '\0';
 446       }
 447
 448       dump_imm_data(iter, decl->ImmediateData.u,
 449                     4, TGSI_IMM_FLOAT32);
 450       for(i = 1; i <= decl->Range.Last; ++i) {
 451          /* indent by strlen of:
 452           *   "DCL IMMX[0..1] {" */
 453          CHR('\n');
 454          TXT( "                " );
 455          TXT( range_indent );
 456          dump_imm_data(iter, decl->ImmediateData.u + i,
 457                        4, TGSI_IMM_FLOAT32);
 458       }
 459
 460       TXT(" }");
 461    }
 462
 463    EOL();
 464
 465    return TRUE;
 466 }
 467
 468 void
 469 tgsi_dump_declaration(
 470    const struct tgsi_full_declaration *decl )
 471 {
 472    struct dump_ctx ctx;
 473
 474    ctx.printf = dump_ctx_printf;
 475
 476    iter_declaration( &ctx.iter, (struct tgsi_full_declaration *)decl );
 477 }
 478
 479 static boolean
 480 iter_property(
 481    struct tgsi_iterate_context *iter,
 482    struct tgsi_full_property *prop )
 483 {
 484    int i;
 485    struct dump_ctx *ctx = (struct dump_ctx *)iter;
 486
 487    assert(Elements(property_names) == TGSI_PROPERTY_COUNT);
 488
 489    TXT( "PROPERTY " );
 490    ENM(prop->Property.PropertyName, property_names);
 491
 492    if (prop->Property.NrTokens > 1)
 493       TXT(" ");
 494
 495    for (i = 0; i < prop->Property.NrTokens - 1; ++i) {
 496       switch (prop->Property.PropertyName) {
 497       case TGSI_PROPERTY_GS_INPUT_PRIM:
 498       case TGSI_PROPERTY_GS_OUTPUT_PRIM:
 499          ENM(prop->u[i].Data, primitive_names);
 500          break;
 501       case TGSI_PROPERTY_FS_COORD_ORIGIN:
 502          ENM(prop->u[i].Data, fs_coord_origin_names);
 503          break;
 504       case TGSI_PROPERTY_FS_COORD_PIXEL_CENTER:
 505          ENM(prop->u[i].Data, fs_coord_pixel_center_names);
 506          break;
 507       default:
 508          SID( prop->u[i].Data );
 509          break;
 510       }
 511       if (i < prop->Property.NrTokens - 2)
 512          TXT( ", " );
 513    }
 514    EOL();
 515
 516    return TRUE;
 517 }
 518
 519 void tgsi_dump_property(
 520    const struct tgsi_full_property *prop )
 521 {
 522    struct dump_ctx ctx;
 523
 524    ctx.printf = dump_ctx_printf;
 525
 526    iter_property( &ctx.iter, (struct tgsi_full_property *)prop );
 527 }
 528
 529 static boolean
 530 iter_immediate(
 531    struct tgsi_iterate_context *iter,
 532    struct tgsi_full_immediate *imm )
 533 {
 534    struct dump_ctx *ctx = (struct dump_ctx *) iter;
 535
 536    TXT( "IMM " );
 537    ENM( imm->Immediate.DataType, immediate_type_names );
 538
 539    dump_imm_data(iter, imm->u, imm->Immediate.NrTokens - 1,
 540                  imm->Immediate.DataType);
 541
 542    EOL();
 543
 544    return TRUE;
 545 }
 546
 547 void
 548 tgsi_dump_immediate(
 549    const struct tgsi_full_immediate *imm )
 550 {
 551    struct dump_ctx ctx;
 552
 553    ctx.printf = dump_ctx_printf;
 554
 555    iter_immediate( &ctx.iter, (struct tgsi_full_immediate *)imm );
 556 }
 557
 558 static boolean
 559 iter_instruction(
 560    struct tgsi_iterate_context *iter,
 561    struct tgsi_full_instruction *inst )
 562 {
 563    struct dump_ctx *ctx = (struct dump_ctx *) iter;
 564    uint instno = ctx->instno++;
 565    const struct tgsi_opcode_info *info = tgsi_get_opcode_info( inst->Instruction.Opcode );
 566    uint i;
 567    boolean first_reg = TRUE;
 568
 569    INSTID( instno );
 570    TXT( ": " );
 571
 572    ctx->indent -= info->pre_dedent;
 573    for(i = 0; (int)i < ctx->indent; ++i)
 574       TXT( "  " );
 575    ctx->indent += info->post_indent;
 576
 577    if (inst->Instruction.Predicate) {
 578       CHR( '(' );
 579
 580       if (inst->Predicate.Negate)
 581          CHR( '!' );
 582
 583       TXT( "PRED[" );
 584       SID( inst->Predicate.Index );
 585       CHR( ']' );
 586
 587       if (inst->Predicate.SwizzleX != TGSI_SWIZZLE_X ||
 588           inst->Predicate.SwizzleY != TGSI_SWIZZLE_Y ||
 589           inst->Predicate.SwizzleZ != TGSI_SWIZZLE_Z ||
 590           inst->Predicate.SwizzleW != TGSI_SWIZZLE_W) {
 591          CHR( '.' );
 592          ENM( inst->Predicate.SwizzleX, tgsi_swizzle_names );
 593          ENM( inst->Predicate.SwizzleY, tgsi_swizzle_names );
 594          ENM( inst->Predicate.SwizzleZ, tgsi_swizzle_names );
 595          ENM( inst->Predicate.SwizzleW, tgsi_swizzle_names );
 596       }
 597
 598       TXT( ") " );
 599    }
 600
 601    TXT( info->mnemonic );
 602
 603    switch (inst->Instruction.Saturate) {
 604    case TGSI_SAT_NONE:
 605       break;
 606    case TGSI_SAT_ZERO_ONE:
 607       TXT( "_SAT" );
 608       break;
 609    case TGSI_SAT_MINUS_PLUS_ONE:
 610       TXT( "_SATNV" );
 611       break;
 612    default:
 613       assert( 0 );
 614    }
 615
 616    for (i = 0; i < inst->Instruction.NumDstRegs; i++) {
 617       const struct tgsi_full_dst_register *dst = &inst->Dst[i];
 618
 619       if (!first_reg)
 620          CHR( ',' );
 621       CHR( ' ' );
 622
 623       _dump_register_dst( ctx, dst );
 624       _dump_writemask( ctx, dst->Register.WriteMask );
 625
 626       first_reg = FALSE;
 627    }
 628
 629    for (i = 0; i < inst->Instruction.NumSrcRegs; i++) {
 630       const struct tgsi_full_src_register *src = &inst->Src[i];
 631
 632       if (!first_reg)
 633          CHR( ',' );
 634       CHR( ' ' );
 635
 636       if (src->Register.Negate)
 637          CHR( '-' );
 638       if (src->Register.Absolute)
 639          CHR( '|' );
 640
 641       _dump_register_src(ctx, src);
 642
 643       if (src->Register.SwizzleX != TGSI_SWIZZLE_X ||
 644           src->Register.SwizzleY != TGSI_SWIZZLE_Y ||
 645           src->Register.SwizzleZ != TGSI_SWIZZLE_Z ||
 646           src->Register.SwizzleW != TGSI_SWIZZLE_W) {
 647          CHR( '.' );
 648          ENM( src->Register.SwizzleX, tgsi_swizzle_names );
 649          ENM( src->Register.SwizzleY, tgsi_swizzle_names );
 650          ENM( src->Register.SwizzleZ, tgsi_swizzle_names );
 651          ENM( src->Register.SwizzleW, tgsi_swizzle_names );
 652       }
 653
 654       if (src->Register.Absolute)
 655          CHR( '|' );
 656
 657       first_reg = FALSE;
 658    }
 659
 660    if (inst->Instruction.Texture) {
 661       TXT( ", " );
 662       ENM( inst->Texture.Texture, tgsi_texture_names );
 663    }
 664
 665    switch (inst->Instruction.Opcode) {
 666    case TGSI_OPCODE_IF:
 667    case TGSI_OPCODE_ELSE:
 668    case TGSI_OPCODE_BGNLOOP:
 669    case TGSI_OPCODE_ENDLOOP:
 670    case TGSI_OPCODE_CAL:
 671       TXT( " :" );
 672       UID( inst->Label.Label );
 673       break;
 674    }
 675
 676    /* update indentation */
 677    if (inst->Instruction.Opcode == TGSI_OPCODE_IF ||
 678        inst->Instruction.Opcode == TGSI_OPCODE_ELSE ||
 679        inst->Instruction.Opcode == TGSI_OPCODE_BGNLOOP) {
 680       ctx->indentation += indent_spaces;
 681    }
 682
 683    EOL();
 684
 685    return TRUE;
 686 }
 687
 688 void
 689 tgsi_dump_instruction(
 690    const struct tgsi_full_instruction *inst,
 691    uint instno )
 692 {
 693    struct dump_ctx ctx;
 694
 695    ctx.instno = instno;
 696    ctx.indent = 0;
 697    ctx.printf = dump_ctx_printf;
 698    ctx.indentation = 0;
 699
 700    iter_instruction( &ctx.iter, (struct tgsi_full_instruction *)inst );
 701 }
 702
 703 static boolean
 704 prolog(
 705    struct tgsi_iterate_context *iter )
 706 {
 707    struct dump_ctx *ctx = (struct dump_ctx *) iter;
 708    ENM( iter->processor.Processor, processor_type_names );
 709    EOL();
 710    return TRUE;
 711 }
 712
 713 void
 714 tgsi_dump(
 715    const struct tgsi_token *tokens,
 716    uint flags )
 717 {
 718    struct dump_ctx ctx;
 719
 720    ctx.iter.prolog = prolog;
 721    ctx.iter.iterate_instruction = iter_instruction;
 722    ctx.iter.iterate_declaration = iter_declaration;
 723    ctx.iter.iterate_immediate = iter_immediate;
 724    ctx.iter.iterate_property = iter_property;
 725    ctx.iter.epilog = NULL;
 726
 727    ctx.instno = 0;
 728    ctx.indent = 0;
 729    ctx.printf = dump_ctx_printf;
 730    ctx.indentation = 0;
 731
 732    tgsi_iterate_shader( tokens, &ctx.iter );
 733 }
 734
 735 struct str_dump_ctx
 736 {
 737    struct dump_ctx base;
 738    char *str;
 739    char *ptr;
 740    int left;
 741 };
 742
 743 static void
 744 str_dump_ctx_printf(struct dump_ctx *ctx, const char *format, ...)
 745 {
 746    struct str_dump_ctx *sctx = (struct str_dump_ctx *)ctx;
 747
 748    if(sctx->left > 1) {
 749       int written;
 750       va_list ap;
 751       va_start(ap, format);
 752       written = util_vsnprintf(sctx->ptr, sctx->left, format, ap);
 753       va_end(ap);
 754
 755       /* Some complicated logic needed to handle the return value of
 756        * vsnprintf:
 757        */
 758       if (written > 0) {
 759          written = MIN2(sctx->left, written);
 760          sctx->ptr += written;
 761          sctx->left -= written;
 762       }
 763    }
 764 }
 765
 766 void
 767 tgsi_dump_str(
 768    const struct tgsi_token *tokens,
 769    uint flags,
 770    char *str,
 771    size_t size)
 772 {
 773    struct str_dump_ctx ctx;
 774
 775    ctx.base.iter.prolog = prolog;
 776    ctx.base.iter.iterate_instruction = iter_instruction;
 777    ctx.base.iter.iterate_declaration = iter_declaration;
 778    ctx.base.iter.iterate_immediate = iter_immediate;
 779    ctx.base.iter.iterate_property = iter_property;
 780    ctx.base.iter.epilog = NULL;
 781
 782    ctx.base.instno = 0;
 783    ctx.base.indent = 0;
 784    ctx.base.printf = &str_dump_ctx_printf;
 785    ctx.base.indentation = 0;
 786
 787    ctx.str = str;
 788    ctx.str[0] = 0;
 789    ctx.ptr = str;
 790    ctx.left = (int)size;
 791
 792    tgsi_iterate_shader( tokens, &ctx.base.iter );
 793 }