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