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