src/gallium/auxiliary/tgsi/tgsi_dump.c - third_party/mesa - Git at Google

 /**************************************************************************
  *
  * Copyright 2007-2008 VMware, Inc.
  * 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 VMWARE 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 <inttypes.h>

 #include "util/u_debug.h"
 #include "util/u_string.h"
 #include "util/u_math.h"
 #include "util/u_memory.h"
 #include "util/u_math.h"
 #include "tgsi_dump.h"
 #include "tgsi_info.h"
 #include "tgsi_iterate.h"
 #include "tgsi_strings.h"


 /** Number of spaces to indent for IF/LOOP/etc */
 static const int indent_spaces = 3;


 struct dump_ctx
 {
    struct tgsi_iterate_context iter;

    boolean dump_float_as_hex;

    uint instno;
    uint immno;
    int indent;

    uint indentation;
    FILE *file;

    void (*dump_printf)(struct dump_ctx *ctx, const char *format, ...);
 };

 static void
 dump_ctx_printf(struct dump_ctx *ctx, const char *format, ...)
 {
    va_list ap;
    (void)ctx;
    va_start(ap, format);
    if (ctx->file)
       vfprintf(ctx->file, format, ap);
    else
       _debug_vprintf(format, ap);
    va_end(ap);
 }

 static void
 dump_enum(
    struct dump_ctx *ctx,
    uint e,
    const char **enums,
    uint enum_count )
 {
    if (e >= enum_count)
       ctx->dump_printf( ctx, "%u", e );
    else
       ctx->dump_printf( ctx, "%s", enums[e] );
 }

 #define EOL()           ctx->dump_printf( ctx, "\n" )
 #define TXT(S)          ctx->dump_printf( ctx, "%s", S )
 #define CHR(C)          ctx->dump_printf( ctx, "%c", C )
 #define UIX(I)          ctx->dump_printf( ctx, "0x%x", I )
 #define UID(I)          ctx->dump_printf( ctx, "%u", I )
 #define SI64D(I)        ctx->dump_printf( ctx, "%"PRId64, I )
 #define UI64D(I)        ctx->dump_printf( ctx, "%"PRIu64, I )
 #define INSTID(I)       ctx->dump_printf( ctx, "% 3u", I )
 #define SID(I)          ctx->dump_printf( ctx, "%d", I )
 #define FLT(F)          ctx->dump_printf( ctx, "%10.4f", F )
 #define DBL(D)          ctx->dump_printf( ctx, "%10.8f", D )
 #define HFLT(F)         ctx->dump_printf( ctx, "0x%08x", fui((F)) )
 #define ENM(E,ENUMS)    dump_enum( ctx, E, ENUMS, sizeof( ENUMS ) / sizeof( *ENUMS ) )

 const char *
 tgsi_swizzle_names[4] =
 {
    "x",
    "y",
    "z",
    "w"
 };

 static void
 _dump_register_src(
    struct dump_ctx *ctx,
    const struct tgsi_full_src_register *src )
 {
    TXT(tgsi_file_name(src->Register.File));
    if (src->Register.Dimension) {
       if (src->Dimension.Indirect) {
          CHR( '[' );
          TXT(tgsi_file_name(src->DimIndirect.File));
          CHR( '[' );
          SID( src->DimIndirect.Index );
          TXT( "]." );
          ENM( src->DimIndirect.Swizzle, tgsi_swizzle_names );
          if (src->Dimension.Index != 0) {
             if (src->Dimension.Index > 0)
                CHR( '+' );
             SID( src->Dimension.Index );
          }
          CHR( ']' );
          if (src->DimIndirect.ArrayID) {
             CHR( '(' );
             SID( src->DimIndirect.ArrayID );
             CHR( ')' );
          }
       } else {
          CHR('[');
          SID(src->Dimension.Index);
          CHR(']');
       }
    }
    if (src->Register.Indirect) {
       CHR( '[' );
       TXT(tgsi_file_name(src->Indirect.File));
       CHR( '[' );
       SID( src->Indirect.Index );
       TXT( "]." );
       ENM( src->Indirect.Swizzle, tgsi_swizzle_names );
       if (src->Register.Index != 0) {
          if (src->Register.Index > 0)
             CHR( '+' );
          SID( src->Register.Index );
       }
       CHR( ']' );
       if (src->Indirect.ArrayID) {
          CHR( '(' );
          SID( src->Indirect.ArrayID );
          CHR( ')' );
       }
    } else {
       CHR( '[' );
       SID( src->Register.Index );
       CHR( ']' );
    }
 }


 static void
 _dump_register_dst(
    struct dump_ctx *ctx,
    const struct tgsi_full_dst_register *dst )
 {
    TXT(tgsi_file_name(dst->Register.File));
    if (dst->Register.Dimension) {
       if (dst->Dimension.Indirect) {
          CHR( '[' );
          TXT(tgsi_file_name(dst->DimIndirect.File));
          CHR( '[' );
          SID( dst->DimIndirect.Index );
          TXT( "]." );
          ENM( dst->DimIndirect.Swizzle, tgsi_swizzle_names );
          if (dst->Dimension.Index != 0) {
             if (dst->Dimension.Index > 0)
                CHR( '+' );
             SID( dst->Dimension.Index );
          }
          CHR( ']' );
          if (dst->DimIndirect.ArrayID) {
             CHR( '(' );
             SID( dst->DimIndirect.ArrayID );
             CHR( ')' );
          }
       } else {
          CHR('[');
          SID(dst->Dimension.Index);
          CHR(']');
       }
    }
    if (dst->Register.Indirect) {
       CHR( '[' );
       TXT(tgsi_file_name(dst->Indirect.File));
       CHR( '[' );
       SID( dst->Indirect.Index );
       TXT( "]." );
       ENM( dst->Indirect.Swizzle, tgsi_swizzle_names );
       if (dst->Register.Index != 0) {
          if (dst->Register.Index > 0)
             CHR( '+' );
          SID( dst->Register.Index );
       }
       CHR( ']' );
       if (dst->Indirect.ArrayID) {
          CHR( '(' );
          SID( dst->Indirect.ArrayID );
          CHR( ')' );
       }
    } else {
       CHR( '[' );
       SID( dst->Register.Index );
       CHR( ']' );
    }
 }
 static void
 _dump_writemask(
    struct dump_ctx *ctx,
    uint writemask )
 {
    if (writemask != TGSI_WRITEMASK_XYZW) {
       CHR( '.' );
       if (writemask & TGSI_WRITEMASK_X)
          CHR( 'x' );
       if (writemask & TGSI_WRITEMASK_Y)
          CHR( 'y' );
       if (writemask & TGSI_WRITEMASK_Z)
          CHR( 'z' );
       if (writemask & TGSI_WRITEMASK_W)
          CHR( 'w' );
    }
 }

 static void
 dump_imm_data(struct tgsi_iterate_context *iter,
               union tgsi_immediate_data *data,
               unsigned num_tokens,
               unsigned data_type)
 {
    struct dump_ctx *ctx = (struct dump_ctx *)iter;
    unsigned i ;

    TXT( " {" );

    assert( num_tokens <= 4 );
    for (i = 0; i < num_tokens; i++) {
       switch (data_type) {
       case TGSI_IMM_FLOAT64: {
          union di d;
          d.ui = data[i].Uint | (uint64_t)data[i+1].Uint << 32;
          DBL( d.d );
          i++;
          break;
       }
       case TGSI_IMM_INT64: {
          union di d;
          d.i = data[i].Uint | (uint64_t)data[i+1].Uint << 32;
          SI64D( d.i );
          i++;
          break;
       }
       case TGSI_IMM_UINT64: {
          union di d;
          d.ui = data[i].Uint | (uint64_t)data[i+1].Uint << 32;
          UI64D( d.ui );
          i++;
          break;
       }
       case TGSI_IMM_FLOAT32:
          if (ctx->dump_float_as_hex)
             HFLT( data[i].Float );
          else
             FLT( data[i].Float );
          break;
       case TGSI_IMM_UINT32:
          UID(data[i].Uint);
          break;
       case TGSI_IMM_INT32:
          SID(data[i].Int);
          break;
       default:
          assert( 0 );
       }

       if (i < num_tokens - 1)
          TXT( ", " );
    }
    TXT( "}" );
 }

 static boolean
 iter_declaration(
    struct tgsi_iterate_context *iter,
    struct tgsi_full_declaration *decl )
 {
    struct dump_ctx *ctx = (struct dump_ctx *)iter;
    boolean patch = decl->Semantic.Name == TGSI_SEMANTIC_PATCH ||
       decl->Semantic.Name == TGSI_SEMANTIC_TESSINNER ||
       decl->Semantic.Name == TGSI_SEMANTIC_TESSOUTER ||
       decl->Semantic.Name == TGSI_SEMANTIC_PRIMID;

    TXT( "DCL " );

    TXT(tgsi_file_name(decl->Declaration.File));

    /* all geometry shader inputs and non-patch tessellation shader inputs are
     * two dimensional
     */
    if (decl->Declaration.File == TGSI_FILE_INPUT &&
        (iter->processor.Processor == PIPE_SHADER_GEOMETRY ||
         (!patch &&
          (iter->processor.Processor == PIPE_SHADER_TESS_CTRL ||
           iter->processor.Processor == PIPE_SHADER_TESS_EVAL)))) {
       TXT("[]");
    }

    /* all non-patch tess ctrl shader outputs are two dimensional */
    if (decl->Declaration.File == TGSI_FILE_OUTPUT &&
        !patch &&
        iter->processor.Processor == PIPE_SHADER_TESS_CTRL) {
       TXT("[]");
    }

    if (decl->Declaration.Dimension) {
       CHR('[');
       SID(decl->Dim.Index2D);
       CHR(']');
    }

    CHR('[');
    SID(decl->Range.First);
    if (decl->Range.First != decl->Range.Last) {
       TXT("..");
       SID(decl->Range.Last);
    }
    CHR(']');

    _dump_writemask(
       ctx,
       decl->Declaration.UsageMask );

    if (decl->Declaration.Array) {
       TXT( ", ARRAY(" );
       SID(decl->Array.ArrayID);
       CHR(')');
    }

    if (decl->Declaration.Local)
       TXT( ", LOCAL" );

    if (decl->Declaration.Semantic) {
       TXT( ", " );
       ENM( decl->Semantic.Name, tgsi_semantic_names );
       if (decl->Semantic.Index != 0 ||
           decl->Semantic.Name == TGSI_SEMANTIC_TEXCOORD ||
           decl->Semantic.Name == TGSI_SEMANTIC_GENERIC) {
          CHR( '[' );
          UID( decl->Semantic.Index );
          CHR( ']' );
       }

       if (decl->Semantic.StreamX != 0 || decl->Semantic.StreamY != 0 ||
           decl->Semantic.StreamZ != 0 || decl->Semantic.StreamW != 0) {
          TXT(", STREAM(");
          UID(decl->Semantic.StreamX);
          TXT(", ");
          UID(decl->Semantic.StreamY);
          TXT(", ");
          UID(decl->Semantic.StreamZ);
          TXT(", ");
          UID(decl->Semantic.StreamW);
          CHR(')');
       }
    }

    if (decl->Declaration.File == TGSI_FILE_IMAGE) {
       TXT(", ");
       ENM(decl->Image.Resource, tgsi_texture_names);
       TXT(", ");
       TXT(util_format_name(decl->Image.Format));
       if (decl->Image.Writable)
          TXT(", WR");
       if (decl->Image.Raw)
          TXT(", RAW");
    }

    if (decl->Declaration.File == TGSI_FILE_BUFFER) {
       if (decl->Declaration.Atomic)
          TXT(", ATOMIC");
    }

    if (decl->Declaration.File == TGSI_FILE_MEMORY) {
       switch (decl->Declaration.MemType) {
       /* Note: ,GLOBAL is optional / the default */
       case TGSI_MEMORY_TYPE_GLOBAL:  TXT(", GLOBAL");  break;
       case TGSI_MEMORY_TYPE_SHARED:  TXT(", SHARED");  break;
       case TGSI_MEMORY_TYPE_PRIVATE: TXT(", PRIVATE"); break;
       case TGSI_MEMORY_TYPE_INPUT:   TXT(", INPUT");   break;
       }
    }

    if (decl->Declaration.File == TGSI_FILE_SAMPLER_VIEW) {
       TXT(", ");
       ENM(decl->SamplerView.Resource, tgsi_texture_names);
       TXT(", ");
       if ((decl->SamplerView.ReturnTypeX == decl->SamplerView.ReturnTypeY) &&
           (decl->SamplerView.ReturnTypeX == decl->SamplerView.ReturnTypeZ) &&
           (decl->SamplerView.ReturnTypeX == decl->SamplerView.ReturnTypeW)) {
          ENM(decl->SamplerView.ReturnTypeX, tgsi_return_type_names);
       } else {
          ENM(decl->SamplerView.ReturnTypeX, tgsi_return_type_names);
          TXT(", ");
          ENM(decl->SamplerView.ReturnTypeY, tgsi_return_type_names);
          TXT(", ");
          ENM(decl->SamplerView.ReturnTypeZ, tgsi_return_type_names);
          TXT(", ");
          ENM(decl->SamplerView.ReturnTypeW, tgsi_return_type_names);
       }
    }

    if (decl->Declaration.Interpolate) {
       if (iter->processor.Processor == PIPE_SHADER_FRAGMENT &&
           decl->Declaration.File == TGSI_FILE_INPUT)
       {
          TXT( ", " );
          ENM( decl->Interp.Interpolate, tgsi_interpolate_names );
       }

       if (decl->Interp.Location != TGSI_INTERPOLATE_LOC_CENTER) {
          TXT( ", " );
          ENM( decl->Interp.Location, tgsi_interpolate_locations );
       }
    }

    if (decl->Declaration.Invariant) {
       TXT( ", INVARIANT" );
    }

    EOL();

    return TRUE;
 }

 void
 tgsi_dump_declaration(
    const struct tgsi_full_declaration *decl )
 {
    struct dump_ctx ctx;
    memset(&ctx, 0, sizeof(ctx));

    ctx.dump_printf = dump_ctx_printf;

    iter_declaration( &ctx.iter, (struct tgsi_full_declaration *)decl );
 }

 static boolean
 iter_property(
    struct tgsi_iterate_context *iter,
    struct tgsi_full_property *prop )
 {
    int i;
    struct dump_ctx *ctx = (struct dump_ctx *)iter;

    TXT( "PROPERTY " );
    ENM(prop->Property.PropertyName, tgsi_property_names);

    if (prop->Property.NrTokens > 1)
       TXT(" ");

    for (i = 0; i < prop->Property.NrTokens - 1; ++i) {
       switch (prop->Property.PropertyName) {
       case TGSI_PROPERTY_GS_INPUT_PRIM:
       case TGSI_PROPERTY_GS_OUTPUT_PRIM:
          ENM(prop->u[i].Data, tgsi_primitive_names);
          break;
       case TGSI_PROPERTY_FS_COORD_ORIGIN:
          ENM(prop->u[i].Data, tgsi_fs_coord_origin_names);
          break;
       case TGSI_PROPERTY_FS_COORD_PIXEL_CENTER:
          ENM(prop->u[i].Data, tgsi_fs_coord_pixel_center_names);
          break;
       case TGSI_PROPERTY_NEXT_SHADER:
          ENM(prop->u[i].Data, tgsi_processor_type_names);
          break;
       default:
          SID( prop->u[i].Data );
          break;
       }
       if (i < prop->Property.NrTokens - 2)
          TXT( ", " );
    }
    EOL();

    return TRUE;
 }

 void tgsi_dump_property(
    const struct tgsi_full_property *prop )
 {
    struct dump_ctx ctx;
    memset(&ctx, 0, sizeof(ctx));

    ctx.dump_printf = dump_ctx_printf;

    iter_property( &ctx.iter, (struct tgsi_full_property *)prop );
 }

 static boolean
 iter_immediate(
    struct tgsi_iterate_context *iter,
    struct tgsi_full_immediate *imm )
 {
    struct dump_ctx *ctx = (struct dump_ctx *) iter;

    TXT( "IMM[" );
    SID( ctx->immno++ );
    TXT( "] " );
    ENM( imm->Immediate.DataType, tgsi_immediate_type_names );

    dump_imm_data(iter, imm->u, imm->Immediate.NrTokens - 1,
                  imm->Immediate.DataType);

    EOL();

    return TRUE;
 }

 void
 tgsi_dump_immediate(
    const struct tgsi_full_immediate *imm )
 {
    struct dump_ctx ctx;
    memset(&ctx, 0, sizeof(ctx));

    ctx.dump_printf = dump_ctx_printf;

    iter_immediate( &ctx.iter, (struct tgsi_full_immediate *)imm );
 }

 static boolean
 iter_instruction(
    struct tgsi_iterate_context *iter,
    struct tgsi_full_instruction *inst )
 {
    struct dump_ctx *ctx = (struct dump_ctx *) iter;
    uint instno = ctx->instno++;
    const struct tgsi_opcode_info *info = tgsi_get_opcode_info( inst->Instruction.Opcode );
    uint i;
    boolean first_reg = TRUE;

    INSTID( instno );
    TXT( ": " );

    ctx->indent -= info->pre_dedent;
    for(i = 0; (int)i < ctx->indent; ++i)
       TXT( "  " );
    ctx->indent += info->post_indent;

    TXT( tgsi_get_opcode_name(inst->Instruction.Opcode) );

    if (inst->Instruction.Saturate) {
       TXT( "_SAT" );
    }

    if (inst->Instruction.Precise) {
       TXT( "_PRECISE" );
    }

    for (i = 0; i < inst->Instruction.NumDstRegs; i++) {
       const struct tgsi_full_dst_register *dst = &inst->Dst[i];

       if (!first_reg)
          CHR( ',' );
       CHR( ' ' );

       _dump_register_dst( ctx, dst );
       _dump_writemask( ctx, dst->Register.WriteMask );

       first_reg = FALSE;
    }

    for (i = 0; i < inst->Instruction.NumSrcRegs; i++) {
       const struct tgsi_full_src_register *src = &inst->Src[i];

       if (!first_reg)
          CHR( ',' );
       CHR( ' ' );

       if (src->Register.Negate)
          CHR( '-' );
       if (src->Register.Absolute)
          CHR( '|' );

       _dump_register_src(ctx, src);

       if (src->Register.SwizzleX != TGSI_SWIZZLE_X ||
           src->Register.SwizzleY != TGSI_SWIZZLE_Y ||
           src->Register.SwizzleZ != TGSI_SWIZZLE_Z ||
           src->Register.SwizzleW != TGSI_SWIZZLE_W) {
          CHR( '.' );
          ENM( src->Register.SwizzleX, tgsi_swizzle_names );
          ENM( src->Register.SwizzleY, tgsi_swizzle_names );
          ENM( src->Register.SwizzleZ, tgsi_swizzle_names );
          ENM( src->Register.SwizzleW, tgsi_swizzle_names );
       }

       if (src->Register.Absolute)
          CHR( '|' );

       first_reg = FALSE;
    }

    if (inst->Instruction.Texture) {
       if (!(inst->Instruction.Opcode >= TGSI_OPCODE_SAMPLE &&
             inst->Instruction.Opcode <= TGSI_OPCODE_GATHER4)) {
          TXT( ", " );
          ENM( inst->Texture.Texture, tgsi_texture_names );
       }
       for (i = 0; i < inst->Texture.NumOffsets; i++) {
          TXT( ", " );
          TXT(tgsi_file_name(inst->TexOffsets[i].File));
          CHR( '[' );
          SID( inst->TexOffsets[i].Index );
          CHR( ']' );
          CHR( '.' );
          ENM( inst->TexOffsets[i].SwizzleX, tgsi_swizzle_names);
          ENM( inst->TexOffsets[i].SwizzleY, tgsi_swizzle_names);
          ENM( inst->TexOffsets[i].SwizzleZ, tgsi_swizzle_names);
       }
    }

    if (inst->Instruction.Memory) {
       uint32_t qualifier = inst->Memory.Qualifier;
       while (qualifier) {
          int bit = ffs(qualifier) - 1;
          qualifier &= ~(1U << bit);
          TXT(", ");
          ENM(bit, tgsi_memory_names);
       }
       if (inst->Memory.Texture) {
          TXT( ", " );
          ENM( inst->Memory.Texture, tgsi_texture_names );
       }
       if (inst->Memory.Format) {
          TXT( ", " );
          TXT( util_format_name(inst->Memory.Format) );
       }
    }

    if (inst->Instruction.Label) {
       switch (inst->Instruction.Opcode) {
       case TGSI_OPCODE_IF:
       case TGSI_OPCODE_UIF:
       case TGSI_OPCODE_ELSE:
       case TGSI_OPCODE_BGNLOOP:
       case TGSI_OPCODE_ENDLOOP:
       case TGSI_OPCODE_CAL:
       case TGSI_OPCODE_BGNSUB:
          TXT( " :" );
          UID( inst->Label.Label );
          break;
       }
    }

    /* update indentation */
    if (inst->Instruction.Opcode == TGSI_OPCODE_IF ||
        inst->Instruction.Opcode == TGSI_OPCODE_UIF ||
        inst->Instruction.Opcode == TGSI_OPCODE_ELSE ||
        inst->Instruction.Opcode == TGSI_OPCODE_BGNLOOP) {
       ctx->indentation += indent_spaces;
    }

    EOL();

    return TRUE;
 }

 void
 tgsi_dump_instruction(
    const struct tgsi_full_instruction *inst,
    uint instno )
 {
    struct dump_ctx ctx;
    memset(&ctx, 0, sizeof(ctx));

    ctx.instno = instno;
    ctx.immno = instno;
    ctx.indent = 0;
    ctx.dump_printf = dump_ctx_printf;
    ctx.indentation = 0;
    ctx.file = NULL;

    iter_instruction( &ctx.iter, (struct tgsi_full_instruction *)inst );
 }

 static boolean
 prolog(
    struct tgsi_iterate_context *iter )
 {
    struct dump_ctx *ctx = (struct dump_ctx *) iter;
    ENM( iter->processor.Processor, tgsi_processor_type_names );
    EOL();
    return TRUE;
 }

 static void
 init_dump_ctx(struct dump_ctx *ctx, uint flags)
 {
    memset(ctx, 0, sizeof(*ctx));

    ctx->iter.prolog = prolog;
    ctx->iter.iterate_instruction = iter_instruction;
    ctx->iter.iterate_declaration = iter_declaration;
    ctx->iter.iterate_immediate = iter_immediate;
    ctx->iter.iterate_property = iter_property;

    if (flags & TGSI_DUMP_FLOAT_AS_HEX)
       ctx->dump_float_as_hex = TRUE;
 }

 void
 tgsi_dump_to_file(const struct tgsi_token *tokens, uint flags, FILE *file)
 {
    struct dump_ctx ctx;
    memset(&ctx, 0, sizeof(ctx));

    init_dump_ctx(&ctx, flags);

    ctx.dump_printf = dump_ctx_printf;
    ctx.file = file;

    tgsi_iterate_shader( tokens, &ctx.iter );
 }

 void
 tgsi_dump(const struct tgsi_token *tokens, uint flags)
 {
    tgsi_dump_to_file(tokens, flags, NULL);
 }

 struct str_dump_ctx
 {
    struct dump_ctx base;
    char *str;
    char *ptr;
    int left;
    bool nospace;
 };

 static void
 str_dump_ctx_printf(struct dump_ctx *ctx, const char *format, ...)
 {
    struct str_dump_ctx *sctx = (struct str_dump_ctx *)ctx;

    if (!sctx->nospace) {
       int written;
       va_list ap;
       va_start(ap, format);
       written = vsnprintf(sctx->ptr, sctx->left, format, ap);
       va_end(ap);

       /* Some complicated logic needed to handle the return value of
        * vsnprintf:
        */
       if (written > 0) {
          if (written >= sctx->left) {
             sctx->nospace = true;
             written = sctx->left;
          }
          sctx->ptr += written;
          sctx->left -= written;
       }
    }
 }

 bool
 tgsi_dump_str(
    const struct tgsi_token *tokens,
    uint flags,
    char *str,
    size_t size)
 {
    struct str_dump_ctx ctx;
    memset(&ctx, 0, sizeof(ctx));

    init_dump_ctx(&ctx.base, flags);

    ctx.base.dump_printf = &str_dump_ctx_printf;

    ctx.str = str;
    ctx.str[0] = 0;
    ctx.ptr = str;
    ctx.left = (int)size;
    ctx.nospace = false;

    tgsi_iterate_shader( tokens, &ctx.base.iter );

    return !ctx.nospace;
 }

 void
 tgsi_dump_instruction_str(
    const struct tgsi_full_instruction *inst,
    uint instno,
    char *str,
    size_t size)
 {
    struct str_dump_ctx ctx;
    memset(&ctx, 0, sizeof(ctx));

    ctx.base.instno = instno;
    ctx.base.immno = instno;
    ctx.base.indent = 0;
    ctx.base.dump_printf = &str_dump_ctx_printf;
    ctx.base.indentation = 0;
    ctx.base.file = NULL;

    ctx.str = str;
    ctx.str[0] = 0;
    ctx.ptr = str;
    ctx.left = (int)size;
    ctx.nospace = false;

    iter_instruction( &ctx.base.iter, (struct tgsi_full_instruction *)inst );
 }
	/**************************************************************************
	*
	* Copyright 2007-2008 VMware, Inc.
	* 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 VMWARE 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 <inttypes.h>

	#include "util/u_debug.h"
	#include "util/u_string.h"
	#include "util/u_math.h"
	#include "util/u_memory.h"
	#include "util/u_math.h"
	#include "tgsi_dump.h"
	#include "tgsi_info.h"
	#include "tgsi_iterate.h"
	#include "tgsi_strings.h"


	/** Number of spaces to indent for IF/LOOP/etc */
	static const int indent_spaces = 3;


	struct dump_ctx
	{
	struct tgsi_iterate_context iter;

	boolean dump_float_as_hex;

	uint instno;
	uint immno;
	int indent;

	uint indentation;
	FILE *file;

	void (dump_printf)(struct dump_ctx ctx, const char *format, ...);
	};

	static void
	dump_ctx_printf(struct dump_ctx ctx, const char format, ...)
	{
	va_list ap;
	(void)ctx;
	va_start(ap, format);
	if (ctx->file)
	vfprintf(ctx->file, format, ap);
	else
	_debug_vprintf(format, ap);
	va_end(ap);
	}

	static void
	dump_enum(
	struct dump_ctx *ctx,
	uint e,
	const char **enums,
	uint enum_count )
	{
	if (e >= enum_count)
	ctx->dump_printf( ctx, "%u", e );
	else
	ctx->dump_printf( ctx, "%s", enums[e] );
	}

	#define EOL() ctx->dump_printf( ctx, "\n" )
	#define TXT(S) ctx->dump_printf( ctx, "%s", S )
	#define CHR(C) ctx->dump_printf( ctx, "%c", C )
	#define UIX(I) ctx->dump_printf( ctx, "0x%x", I )
	#define UID(I) ctx->dump_printf( ctx, "%u", I )
	#define SI64D(I) ctx->dump_printf( ctx, "%"PRId64, I )
	#define UI64D(I) ctx->dump_printf( ctx, "%"PRIu64, I )
	#define INSTID(I) ctx->dump_printf( ctx, "% 3u", I )
	#define SID(I) ctx->dump_printf( ctx, "%d", I )
	#define FLT(F) ctx->dump_printf( ctx, "%10.4f", F )
	#define DBL(D) ctx->dump_printf( ctx, "%10.8f", D )
	#define HFLT(F) ctx->dump_printf( ctx, "0x%08x", fui((F)) )
	#define ENM(E,ENUMS) dump_enum( ctx, E, ENUMS, sizeof( ENUMS ) / sizeof( *ENUMS ) )

	const char *
	tgsi_swizzle_names[4] =
	{
	"x",
	"y",
	"z",
	"w"
	};

	static void
	_dump_register_src(
	struct dump_ctx *ctx,
	const struct tgsi_full_src_register *src )
	{
	TXT(tgsi_file_name(src->Register.File));
	if (src->Register.Dimension) {
	if (src->Dimension.Indirect) {
	CHR( '[' );
	TXT(tgsi_file_name(src->DimIndirect.File));
	CHR( '[' );
	SID( src->DimIndirect.Index );
	TXT( "]." );
	ENM( src->DimIndirect.Swizzle, tgsi_swizzle_names );
	if (src->Dimension.Index != 0) {
	if (src->Dimension.Index > 0)
	CHR( '+' );
	SID( src->Dimension.Index );
	}
	CHR( ']' );
	if (src->DimIndirect.ArrayID) {
	CHR( '(' );
	SID( src->DimIndirect.ArrayID );
	CHR( ')' );
	}
	} else {
	CHR('[');
	SID(src->Dimension.Index);
	CHR(']');
	}
	}
	if (src->Register.Indirect) {
	CHR( '[' );
	TXT(tgsi_file_name(src->Indirect.File));
	CHR( '[' );
	SID( src->Indirect.Index );
	TXT( "]." );
	ENM( src->Indirect.Swizzle, tgsi_swizzle_names );
	if (src->Register.Index != 0) {
	if (src->Register.Index > 0)
	CHR( '+' );
	SID( src->Register.Index );
	}
	CHR( ']' );
	if (src->Indirect.ArrayID) {
	CHR( '(' );
	SID( src->Indirect.ArrayID );
	CHR( ')' );
	}
	} else {
	CHR( '[' );
	SID( src->Register.Index );
	CHR( ']' );
	}
	}


	static void
	_dump_register_dst(
	struct dump_ctx *ctx,
	const struct tgsi_full_dst_register *dst )
	{
	TXT(tgsi_file_name(dst->Register.File));
	if (dst->Register.Dimension) {
	if (dst->Dimension.Indirect) {
	CHR( '[' );
	TXT(tgsi_file_name(dst->DimIndirect.File));
	CHR( '[' );
	SID( dst->DimIndirect.Index );
	TXT( "]." );
	ENM( dst->DimIndirect.Swizzle, tgsi_swizzle_names );
	if (dst->Dimension.Index != 0) {
	if (dst->Dimension.Index > 0)
	CHR( '+' );
	SID( dst->Dimension.Index );
	}
	CHR( ']' );
	if (dst->DimIndirect.ArrayID) {
	CHR( '(' );
	SID( dst->DimIndirect.ArrayID );
	CHR( ')' );
	}
	} else {
	CHR('[');
	SID(dst->Dimension.Index);
	CHR(']');
	}
	}
	if (dst->Register.Indirect) {
	CHR( '[' );
	TXT(tgsi_file_name(dst->Indirect.File));
	CHR( '[' );
	SID( dst->Indirect.Index );
	TXT( "]." );
	ENM( dst->Indirect.Swizzle, tgsi_swizzle_names );
	if (dst->Register.Index != 0) {
	if (dst->Register.Index > 0)
	CHR( '+' );
	SID( dst->Register.Index );
	}
	CHR( ']' );
	if (dst->Indirect.ArrayID) {
	CHR( '(' );
	SID( dst->Indirect.ArrayID );
	CHR( ')' );
	}
	} else {
	CHR( '[' );
	SID( dst->Register.Index );
	CHR( ']' );
	}
	}
	static void
	_dump_writemask(
	struct dump_ctx *ctx,
	uint writemask )
	{
	if (writemask != TGSI_WRITEMASK_XYZW) {
	CHR( '.' );
	if (writemask & TGSI_WRITEMASK_X)
	CHR( 'x' );
	if (writemask & TGSI_WRITEMASK_Y)
	CHR( 'y' );
	if (writemask & TGSI_WRITEMASK_Z)
	CHR( 'z' );
	if (writemask & TGSI_WRITEMASK_W)
	CHR( 'w' );
	}
	}

	static void
	dump_imm_data(struct tgsi_iterate_context *iter,
	union tgsi_immediate_data *data,
	unsigned num_tokens,
	unsigned data_type)
	{
	struct dump_ctx ctx = (struct dump_ctx )iter;
	unsigned i ;

	TXT( " {" );

	assert( num_tokens <= 4 );
	for (i = 0; i < num_tokens; i++) {
	switch (data_type) {
	case TGSI_IMM_FLOAT64: {
	union di d;
	d.ui = data[i].Uint \| (uint64_t)data[i+1].Uint << 32;
	DBL( d.d );
	i++;
	break;
	}
	case TGSI_IMM_INT64: {
	union di d;
	d.i = data[i].Uint \| (uint64_t)data[i+1].Uint << 32;
	SI64D( d.i );
	i++;
	break;
	}
	case TGSI_IMM_UINT64: {
	union di d;
	d.ui = data[i].Uint \| (uint64_t)data[i+1].Uint << 32;
	UI64D( d.ui );
	i++;
	break;
	}
	case TGSI_IMM_FLOAT32:
	if (ctx->dump_float_as_hex)
	HFLT( data[i].Float );
	else
	FLT( data[i].Float );
	break;
	case TGSI_IMM_UINT32:
	UID(data[i].Uint);
	break;
	case TGSI_IMM_INT32:
	SID(data[i].Int);
	break;
	default:
	assert( 0 );
	}

	if (i < num_tokens - 1)
	TXT( ", " );
	}
	TXT( "}" );
	}

	static boolean
	iter_declaration(
	struct tgsi_iterate_context *iter,
	struct tgsi_full_declaration *decl )
	{
	struct dump_ctx ctx = (struct dump_ctx )iter;
	boolean patch = decl->Semantic.Name == TGSI_SEMANTIC_PATCH \|\|
	decl->Semantic.Name == TGSI_SEMANTIC_TESSINNER \|\|
	decl->Semantic.Name == TGSI_SEMANTIC_TESSOUTER \|\|
	decl->Semantic.Name == TGSI_SEMANTIC_PRIMID;

	TXT( "DCL " );

	TXT(tgsi_file_name(decl->Declaration.File));

	/* all geometry shader inputs and non-patch tessellation shader inputs are
	* two dimensional
	*/
	if (decl->Declaration.File == TGSI_FILE_INPUT &&
	(iter->processor.Processor == PIPE_SHADER_GEOMETRY \|\|
	(!patch &&
	(iter->processor.Processor == PIPE_SHADER_TESS_CTRL \|\|
	iter->processor.Processor == PIPE_SHADER_TESS_EVAL)))) {
	TXT("[]");
	}

	/* all non-patch tess ctrl shader outputs are two dimensional */
	if (decl->Declaration.File == TGSI_FILE_OUTPUT &&
	!patch &&
	iter->processor.Processor == PIPE_SHADER_TESS_CTRL) {
	TXT("[]");
	}

	if (decl->Declaration.Dimension) {
	CHR('[');
	SID(decl->Dim.Index2D);
	CHR(']');
	}

	CHR('[');
	SID(decl->Range.First);
	if (decl->Range.First != decl->Range.Last) {
	TXT("..");
	SID(decl->Range.Last);
	}
	CHR(']');

	_dump_writemask(
	ctx,
	decl->Declaration.UsageMask );

	if (decl->Declaration.Array) {
	TXT( ", ARRAY(" );
	SID(decl->Array.ArrayID);
	CHR(')');
	}

	if (decl->Declaration.Local)
	TXT( ", LOCAL" );

	if (decl->Declaration.Semantic) {
	TXT( ", " );
	ENM( decl->Semantic.Name, tgsi_semantic_names );
	if (decl->Semantic.Index != 0 \|\|
	decl->Semantic.Name == TGSI_SEMANTIC_TEXCOORD \|\|
	decl->Semantic.Name == TGSI_SEMANTIC_GENERIC) {
	CHR( '[' );
	UID( decl->Semantic.Index );
	CHR( ']' );
	}

	if (decl->Semantic.StreamX != 0 \|\| decl->Semantic.StreamY != 0 \|\|
	decl->Semantic.StreamZ != 0 \|\| decl->Semantic.StreamW != 0) {
	TXT(", STREAM(");
	UID(decl->Semantic.StreamX);
	TXT(", ");
	UID(decl->Semantic.StreamY);
	TXT(", ");
	UID(decl->Semantic.StreamZ);
	TXT(", ");
	UID(decl->Semantic.StreamW);
	CHR(')');
	}
	}

	if (decl->Declaration.File == TGSI_FILE_IMAGE) {
	TXT(", ");
	ENM(decl->Image.Resource, tgsi_texture_names);
	TXT(", ");
	TXT(util_format_name(decl->Image.Format));
	if (decl->Image.Writable)
	TXT(", WR");
	if (decl->Image.Raw)
	TXT(", RAW");
	}

	if (decl->Declaration.File == TGSI_FILE_BUFFER) {
	if (decl->Declaration.Atomic)
	TXT(", ATOMIC");
	}

	if (decl->Declaration.File == TGSI_FILE_MEMORY) {
	switch (decl->Declaration.MemType) {
	/* Note: ,GLOBAL is optional / the default */
	case TGSI_MEMORY_TYPE_GLOBAL: TXT(", GLOBAL"); break;
	case TGSI_MEMORY_TYPE_SHARED: TXT(", SHARED"); break;
	case TGSI_MEMORY_TYPE_PRIVATE: TXT(", PRIVATE"); break;
	case TGSI_MEMORY_TYPE_INPUT: TXT(", INPUT"); break;
	}
	}

	if (decl->Declaration.File == TGSI_FILE_SAMPLER_VIEW) {
	TXT(", ");
	ENM(decl->SamplerView.Resource, tgsi_texture_names);
	TXT(", ");
	if ((decl->SamplerView.ReturnTypeX == decl->SamplerView.ReturnTypeY) &&
	(decl->SamplerView.ReturnTypeX == decl->SamplerView.ReturnTypeZ) &&
	(decl->SamplerView.ReturnTypeX == decl->SamplerView.ReturnTypeW)) {
	ENM(decl->SamplerView.ReturnTypeX, tgsi_return_type_names);
	} else {
	ENM(decl->SamplerView.ReturnTypeX, tgsi_return_type_names);
	TXT(", ");
	ENM(decl->SamplerView.ReturnTypeY, tgsi_return_type_names);
	TXT(", ");
	ENM(decl->SamplerView.ReturnTypeZ, tgsi_return_type_names);
	TXT(", ");
	ENM(decl->SamplerView.ReturnTypeW, tgsi_return_type_names);
	}
	}

	if (decl->Declaration.Interpolate) {
	if (iter->processor.Processor == PIPE_SHADER_FRAGMENT &&
	decl->Declaration.File == TGSI_FILE_INPUT)
	{
	TXT( ", " );
	ENM( decl->Interp.Interpolate, tgsi_interpolate_names );
	}

	if (decl->Interp.Location != TGSI_INTERPOLATE_LOC_CENTER) {
	TXT( ", " );
	ENM( decl->Interp.Location, tgsi_interpolate_locations );
	}
	}

	if (decl->Declaration.Invariant) {
	TXT( ", INVARIANT" );
	}

	EOL();

	return TRUE;
	}

	void
	tgsi_dump_declaration(
	const struct tgsi_full_declaration *decl )
	{
	struct dump_ctx ctx;
	memset(&ctx, 0, sizeof(ctx));

	ctx.dump_printf = dump_ctx_printf;

	iter_declaration( &ctx.iter, (struct tgsi_full_declaration *)decl );
	}

	static boolean
	iter_property(
	struct tgsi_iterate_context *iter,
	struct tgsi_full_property *prop )
	{
	int i;
	struct dump_ctx ctx = (struct dump_ctx )iter;

	TXT( "PROPERTY " );
	ENM(prop->Property.PropertyName, tgsi_property_names);

	if (prop->Property.NrTokens > 1)
	TXT(" ");

	for (i = 0; i < prop->Property.NrTokens - 1; ++i) {
	switch (prop->Property.PropertyName) {
	case TGSI_PROPERTY_GS_INPUT_PRIM:
	case TGSI_PROPERTY_GS_OUTPUT_PRIM:
	ENM(prop->u[i].Data, tgsi_primitive_names);
	break;
	case TGSI_PROPERTY_FS_COORD_ORIGIN:
	ENM(prop->u[i].Data, tgsi_fs_coord_origin_names);
	break;
	case TGSI_PROPERTY_FS_COORD_PIXEL_CENTER:
	ENM(prop->u[i].Data, tgsi_fs_coord_pixel_center_names);
	break;
	case TGSI_PROPERTY_NEXT_SHADER:
	ENM(prop->u[i].Data, tgsi_processor_type_names);
	break;
	default:
	SID( prop->u[i].Data );
	break;
	}
	if (i < prop->Property.NrTokens - 2)
	TXT( ", " );
	}
	EOL();

	return TRUE;
	}

	void tgsi_dump_property(
	const struct tgsi_full_property *prop )
	{
	struct dump_ctx ctx;
	memset(&ctx, 0, sizeof(ctx));

	ctx.dump_printf = dump_ctx_printf;

	iter_property( &ctx.iter, (struct tgsi_full_property *)prop );
	}

	static boolean
	iter_immediate(
	struct tgsi_iterate_context *iter,
	struct tgsi_full_immediate *imm )
	{
	struct dump_ctx ctx = (struct dump_ctx ) iter;

	TXT( "IMM[" );
	SID( ctx->immno++ );
	TXT( "] " );
	ENM( imm->Immediate.DataType, tgsi_immediate_type_names );

	dump_imm_data(iter, imm->u, imm->Immediate.NrTokens - 1,
	imm->Immediate.DataType);

	EOL();

	return TRUE;
	}

	void
	tgsi_dump_immediate(
	const struct tgsi_full_immediate *imm )
	{
	struct dump_ctx ctx;
	memset(&ctx, 0, sizeof(ctx));

	ctx.dump_printf = dump_ctx_printf;

	iter_immediate( &ctx.iter, (struct tgsi_full_immediate *)imm );
	}

	static boolean
	iter_instruction(
	struct tgsi_iterate_context *iter,
	struct tgsi_full_instruction *inst )
	{
	struct dump_ctx ctx = (struct dump_ctx ) iter;
	uint instno = ctx->instno++;
	const struct tgsi_opcode_info *info = tgsi_get_opcode_info( inst->Instruction.Opcode );
	uint i;
	boolean first_reg = TRUE;

	INSTID( instno );
	TXT( ": " );

	ctx->indent -= info->pre_dedent;
	for(i = 0; (int)i < ctx->indent; ++i)
	TXT( " " );
	ctx->indent += info->post_indent;

	TXT( tgsi_get_opcode_name(inst->Instruction.Opcode) );

	if (inst->Instruction.Saturate) {
	TXT( "_SAT" );
	}

	if (inst->Instruction.Precise) {
	TXT( "_PRECISE" );
	}

	for (i = 0; i < inst->Instruction.NumDstRegs; i++) {
	const struct tgsi_full_dst_register *dst = &inst->Dst[i];

	if (!first_reg)
	CHR( ',' );
	CHR( ' ' );

	_dump_register_dst( ctx, dst );
	_dump_writemask( ctx, dst->Register.WriteMask );

	first_reg = FALSE;
	}

	for (i = 0; i < inst->Instruction.NumSrcRegs; i++) {
	const struct tgsi_full_src_register *src = &inst->Src[i];

	if (!first_reg)
	CHR( ',' );
	CHR( ' ' );

	if (src->Register.Negate)
	CHR( '-' );
	if (src->Register.Absolute)
	CHR( '\|' );

	_dump_register_src(ctx, src);

	if (src->Register.SwizzleX != TGSI_SWIZZLE_X \|\|
	src->Register.SwizzleY != TGSI_SWIZZLE_Y \|\|
	src->Register.SwizzleZ != TGSI_SWIZZLE_Z \|\|
	src->Register.SwizzleW != TGSI_SWIZZLE_W) {
	CHR( '.' );
	ENM( src->Register.SwizzleX, tgsi_swizzle_names );
	ENM( src->Register.SwizzleY, tgsi_swizzle_names );
	ENM( src->Register.SwizzleZ, tgsi_swizzle_names );
	ENM( src->Register.SwizzleW, tgsi_swizzle_names );
	}

	if (src->Register.Absolute)
	CHR( '\|' );

	first_reg = FALSE;
	}

	if (inst->Instruction.Texture) {
	if (!(inst->Instruction.Opcode >= TGSI_OPCODE_SAMPLE &&
	inst->Instruction.Opcode <= TGSI_OPCODE_GATHER4)) {
	TXT( ", " );
	ENM( inst->Texture.Texture, tgsi_texture_names );
	}
	for (i = 0; i < inst->Texture.NumOffsets; i++) {
	TXT( ", " );
	TXT(tgsi_file_name(inst->TexOffsets[i].File));
	CHR( '[' );
	SID( inst->TexOffsets[i].Index );
	CHR( ']' );
	CHR( '.' );
	ENM( inst->TexOffsets[i].SwizzleX, tgsi_swizzle_names);
	ENM( inst->TexOffsets[i].SwizzleY, tgsi_swizzle_names);
	ENM( inst->TexOffsets[i].SwizzleZ, tgsi_swizzle_names);
	}
	}

	if (inst->Instruction.Memory) {
	uint32_t qualifier = inst->Memory.Qualifier;
	while (qualifier) {
	int bit = ffs(qualifier) - 1;
	qualifier &= ~(1U << bit);
	TXT(", ");
	ENM(bit, tgsi_memory_names);
	}
	if (inst->Memory.Texture) {
	TXT( ", " );
	ENM( inst->Memory.Texture, tgsi_texture_names );
	}
	if (inst->Memory.Format) {
	TXT( ", " );
	TXT( util_format_name(inst->Memory.Format) );
	}
	}

	if (inst->Instruction.Label) {
	switch (inst->Instruction.Opcode) {
	case TGSI_OPCODE_IF:
	case TGSI_OPCODE_UIF:
	case TGSI_OPCODE_ELSE:
	case TGSI_OPCODE_BGNLOOP:
	case TGSI_OPCODE_ENDLOOP:
	case TGSI_OPCODE_CAL:
	case TGSI_OPCODE_BGNSUB:
	TXT( " :" );
	UID( inst->Label.Label );
	break;
	}
	}

	/* update indentation */
	if (inst->Instruction.Opcode == TGSI_OPCODE_IF \|\|
	inst->Instruction.Opcode == TGSI_OPCODE_UIF \|\|
	inst->Instruction.Opcode == TGSI_OPCODE_ELSE \|\|
	inst->Instruction.Opcode == TGSI_OPCODE_BGNLOOP) {
	ctx->indentation += indent_spaces;
	}

	EOL();

	return TRUE;
	}

	void
	tgsi_dump_instruction(
	const struct tgsi_full_instruction *inst,
	uint instno )
	{
	struct dump_ctx ctx;
	memset(&ctx, 0, sizeof(ctx));

	ctx.instno = instno;
	ctx.immno = instno;
	ctx.indent = 0;
	ctx.dump_printf = dump_ctx_printf;
	ctx.indentation = 0;
	ctx.file = NULL;

	iter_instruction( &ctx.iter, (struct tgsi_full_instruction *)inst );
	}

	static boolean
	prolog(
	struct tgsi_iterate_context *iter )
	{
	struct dump_ctx ctx = (struct dump_ctx ) iter;
	ENM( iter->processor.Processor, tgsi_processor_type_names );
	EOL();
	return TRUE;
	}

	static void
	init_dump_ctx(struct dump_ctx *ctx, uint flags)
	{
	memset(ctx, 0, sizeof(*ctx));

	ctx->iter.prolog = prolog;
	ctx->iter.iterate_instruction = iter_instruction;
	ctx->iter.iterate_declaration = iter_declaration;
	ctx->iter.iterate_immediate = iter_immediate;
	ctx->iter.iterate_property = iter_property;

	if (flags & TGSI_DUMP_FLOAT_AS_HEX)
	ctx->dump_float_as_hex = TRUE;
	}

	void
	tgsi_dump_to_file(const struct tgsi_token tokens, uint flags, FILE file)
	{
	struct dump_ctx ctx;
	memset(&ctx, 0, sizeof(ctx));

	init_dump_ctx(&ctx, flags);

	ctx.dump_printf = dump_ctx_printf;
	ctx.file = file;

	tgsi_iterate_shader( tokens, &ctx.iter );
	}

	void
	tgsi_dump(const struct tgsi_token *tokens, uint flags)
	{
	tgsi_dump_to_file(tokens, flags, NULL);
	}

	struct str_dump_ctx
	{
	struct dump_ctx base;
	char *str;
	char *ptr;
	int left;
	bool nospace;
	};

	static void
	str_dump_ctx_printf(struct dump_ctx ctx, const char format, ...)
	{
	struct str_dump_ctx sctx = (struct str_dump_ctx )ctx;

	if (!sctx->nospace) {
	int written;
	va_list ap;
	va_start(ap, format);
	written = vsnprintf(sctx->ptr, sctx->left, format, ap);
	va_end(ap);

	/* Some complicated logic needed to handle the return value of
	* vsnprintf:
	*/
	if (written > 0) {
	if (written >= sctx->left) {
	sctx->nospace = true;
	written = sctx->left;
	}
	sctx->ptr += written;
	sctx->left -= written;
	}
	}
	}

	bool
	tgsi_dump_str(
	const struct tgsi_token *tokens,
	uint flags,
	char *str,
	size_t size)
	{
	struct str_dump_ctx ctx;
	memset(&ctx, 0, sizeof(ctx));

	init_dump_ctx(&ctx.base, flags);

	ctx.base.dump_printf = &str_dump_ctx_printf;

	ctx.str = str;
	ctx.str[0] = 0;
	ctx.ptr = str;
	ctx.left = (int)size;
	ctx.nospace = false;

	tgsi_iterate_shader( tokens, &ctx.base.iter );

	return !ctx.nospace;
	}

	void
	tgsi_dump_instruction_str(
	const struct tgsi_full_instruction *inst,
	uint instno,
	char *str,
	size_t size)
	{
	struct str_dump_ctx ctx;
	memset(&ctx, 0, sizeof(ctx));

	ctx.base.instno = instno;
	ctx.base.immno = instno;
	ctx.base.indent = 0;
	ctx.base.dump_printf = &str_dump_ctx_printf;
	ctx.base.indentation = 0;
	ctx.base.file = NULL;

	ctx.str = str;
	ctx.str[0] = 0;
	ctx.ptr = str;
	ctx.left = (int)size;
	ctx.nospace = false;

	iter_instruction( &ctx.base.iter, (struct tgsi_full_instruction *)inst );
	}