src/mesa/pipe/tgsi/exec/tgsi_parse.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 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 "tgsi_platform.h"
  29 #include "tgsi_core.h"
  30
  31 void
  32 tgsi_full_token_init(
  33    union tgsi_full_token *full_token )
  34 {
  35    full_token->Token.Type = TGSI_TOKEN_TYPE_DECLARATION;
  36 }
  37
  38 void
  39 tgsi_full_token_free(
  40    union tgsi_full_token *full_token )
  41 {
  42    if( full_token->Token.Type == TGSI_TOKEN_TYPE_IMMEDIATE ) {
  43       FREE( full_token->FullImmediate.u.Pointer );
  44    }
  45 }
  46
  47 unsigned
  48 tgsi_parse_init(
  49    struct tgsi_parse_context *ctx,
  50    const struct tgsi_token *tokens )
  51 {
  52    ctx->FullVersion.Version = *(struct tgsi_version *) &tokens[0];
  53    if( ctx->FullVersion.Version.MajorVersion > 1 ) {
  54       return TGSI_PARSE_ERROR;
  55    }
  56
  57    ctx->FullHeader.Header = *(struct tgsi_header *) &tokens[1];
  58    if( ctx->FullHeader.Header.HeaderSize >= 2 ) {
  59       ctx->FullHeader.Processor = *(struct tgsi_processor *) &tokens[2];
  60    }
  61    else {
  62       ctx->FullHeader.Processor = tgsi_default_processor();
  63    }
  64
  65    ctx->Tokens = tokens;
  66    ctx->Position = 1 + ctx->FullHeader.Header.HeaderSize;
  67
  68    tgsi_full_token_init( &ctx->FullToken );
  69
  70    return TGSI_PARSE_OK;
  71 }
  72
  73 void
  74 tgsi_parse_free(
  75    struct tgsi_parse_context *ctx )
  76 {
  77    tgsi_full_token_free( &ctx->FullToken );
  78 }
  79
  80 boolean
  81 tgsi_parse_end_of_tokens(
  82    struct tgsi_parse_context *ctx )
  83 {
  84    return ctx->Position >=
  85       1 + ctx->FullHeader.Header.HeaderSize + ctx->FullHeader.Header.BodySize;
  86 }
  87
  88 static void
  89 next_token(
  90    struct tgsi_parse_context *ctx,
  91    void *token )
  92 {
  93    assert( !tgsi_parse_end_of_tokens( ctx ) );
  94
  95    *(struct tgsi_token *) token = ctx->Tokens[ctx->Position++];
  96 }
  97
  98 void
  99 tgsi_parse_token(
 100    struct tgsi_parse_context *ctx )
 101 {
 102    struct tgsi_token token;
 103    unsigned i;
 104
 105    tgsi_full_token_free( &ctx->FullToken );
 106    tgsi_full_token_init( &ctx->FullToken );
 107
 108    next_token( ctx, &token );
 109
 110    switch( token.Type ) {
 111    case TGSI_TOKEN_TYPE_DECLARATION:
 112    {
 113       struct tgsi_full_declaration *decl = &ctx->FullToken.FullDeclaration;
 114
 115       *decl = tgsi_default_full_declaration();
 116       decl->Declaration = *(struct tgsi_declaration *) &token;
 117
 118       switch( decl->Declaration.Type ) {
 119       case TGSI_DECLARE_RANGE:
 120          next_token( ctx, &decl->u.DeclarationRange );
 121          break;
 122
 123       case TGSI_DECLARE_MASK:
 124          next_token( ctx, &decl->u.DeclarationMask );
 125          break;
 126
 127       default:
 128          assert (0);
 129       }
 130
 131       if( decl->Declaration.Interpolate ) {
 132          next_token( ctx, &decl->Interpolation );
 133       }
 134
 135       if( decl->Declaration.Semantic ) {
 136          next_token( ctx, &decl->Semantic );
 137       }
 138
 139       break;
 140    }
 141
 142    case TGSI_TOKEN_TYPE_IMMEDIATE:
 143    {
 144       struct tgsi_full_immediate *imm = &ctx->FullToken.FullImmediate;
 145
 146       *imm = tgsi_default_full_immediate();
 147       imm->Immediate = *(struct tgsi_immediate *) &token;
 148
 149       assert( !imm->Immediate.Extended );
 150
 151       switch (imm->Immediate.DataType) {
 152       case TGSI_IMM_FLOAT32:
 153          imm->u.Pointer = MALLOC(
 154             sizeof( struct tgsi_immediate_float32 ) * (imm->Immediate.Size - 1) );
 155          for( i = 0; i < imm->Immediate.Size - 1; i++ ) {
 156             next_token( ctx, &imm->u.ImmediateFloat32[i] );
 157          }
 158          break;
 159
 160       default:
 161          assert( 0 );
 162       }
 163
 164       break;
 165    }
 166
 167    case TGSI_TOKEN_TYPE_INSTRUCTION:
 168    {
 169       struct tgsi_full_instruction *inst = &ctx->FullToken.FullInstruction;
 170       unsigned extended;
 171
 172       *inst = tgsi_default_full_instruction();
 173       inst->Instruction = *(struct tgsi_instruction *) &token;
 174
 175       extended = inst->Instruction.Extended;
 176
 177       while( extended ) {
 178          struct tgsi_src_register_ext token;
 179
 180          next_token( ctx, &token );
 181
 182          switch( token.Type ) {
 183          case TGSI_INSTRUCTION_EXT_TYPE_NV:
 184             inst->InstructionExtNv =
 185                *(struct tgsi_instruction_ext_nv *) &token;
 186             break;
 187
 188          case TGSI_INSTRUCTION_EXT_TYPE_LABEL:
 189             inst->InstructionExtLabel =
 190                *(struct tgsi_instruction_ext_label *) &token;
 191             break;
 192
 193          case TGSI_INSTRUCTION_EXT_TYPE_TEXTURE:
 194             inst->InstructionExtTexture =
 195                *(struct tgsi_instruction_ext_texture *) &token;
 196             break;
 197
 198          default:
 199             assert( 0 );
 200          }
 201
 202          extended = token.Extended;
 203       }
 204
 205       assert( inst->Instruction.NumDstRegs <= TGSI_FULL_MAX_DST_REGISTERS );
 206
 207       for(  i = 0; i < inst->Instruction.NumDstRegs; i++ ) {
 208          unsigned extended;
 209
 210          next_token( ctx, &inst->FullDstRegisters[i].DstRegister );
 211
 212          /*
 213           * No support for indirect or multi-dimensional addressing.
 214           */
 215          assert( !inst->FullDstRegisters[i].DstRegister.Indirect );
 216          assert( !inst->FullDstRegisters[i].DstRegister.Dimension );
 217
 218          extended = inst->FullDstRegisters[i].DstRegister.Extended;
 219
 220          while( extended ) {
 221             struct tgsi_src_register_ext token;
 222
 223             next_token( ctx, &token );
 224
 225             switch( token.Type ) {
 226             case TGSI_DST_REGISTER_EXT_TYPE_CONDCODE:
 227                inst->FullDstRegisters[i].DstRegisterExtConcode =
 228                   *(struct tgsi_dst_register_ext_concode *) &token;
 229                break;
 230
 231             case TGSI_DST_REGISTER_EXT_TYPE_MODULATE:
 232                inst->FullDstRegisters[i].DstRegisterExtModulate =
 233                   *(struct tgsi_dst_register_ext_modulate *) &token;
 234                break;
 235
 236             default:
 237                assert( 0 );
 238             }
 239
 240             extended = token.Extended;
 241          }
 242       }
 243
 244       assert( inst->Instruction.NumSrcRegs <= TGSI_FULL_MAX_SRC_REGISTERS );
 245
 246       for( i = 0; i < inst->Instruction.NumSrcRegs; i++ ) {
 247          unsigned extended;
 248
 249          next_token( ctx, &inst->FullSrcRegisters[i].SrcRegister );
 250
 251          extended = inst->FullSrcRegisters[i].SrcRegister.Extended;
 252
 253          while( extended ) {
 254             struct tgsi_src_register_ext token;
 255
 256             next_token( ctx, &token );
 257
 258             switch( token.Type ) {
 259             case TGSI_SRC_REGISTER_EXT_TYPE_SWZ:
 260                inst->FullSrcRegisters[i].SrcRegisterExtSwz =
 261                   *(struct tgsi_src_register_ext_swz *) &token;
 262                break;
 263
 264             case TGSI_SRC_REGISTER_EXT_TYPE_MOD:
 265                inst->FullSrcRegisters[i].SrcRegisterExtMod =
 266                   *(struct tgsi_src_register_ext_mod *) &token;
 267                break;
 268
 269             default:
 270                assert( 0 );
 271             }
 272
 273             extended = token.Extended;
 274          }
 275
 276          if( inst->FullSrcRegisters[i].SrcRegister.Indirect ) {
 277             next_token( ctx, &inst->FullSrcRegisters[i].SrcRegisterInd );
 278
 279             /*
 280              * No support for indirect or multi-dimensional addressing.
 281              */
 282             assert( !inst->FullSrcRegisters[i].SrcRegisterInd.Indirect );
 283             assert( !inst->FullSrcRegisters[i].SrcRegisterInd.Dimension );
 284             assert( !inst->FullSrcRegisters[i].SrcRegisterInd.Extended );
 285          }
 286
 287          if( inst->FullSrcRegisters[i].SrcRegister.Dimension ) {
 288             next_token( ctx, &inst->FullSrcRegisters[i].SrcRegisterDim );
 289
 290             /*
 291              * No support for multi-dimensional addressing.
 292              */
 293             assert( !inst->FullSrcRegisters[i].SrcRegisterDim.Dimension );
 294             assert( !inst->FullSrcRegisters[i].SrcRegisterDim.Extended );
 295
 296             if( inst->FullSrcRegisters[i].SrcRegisterDim.Indirect ) {
 297                next_token( ctx, &inst->FullSrcRegisters[i].SrcRegisterDimInd );
 298
 299                /*
 300                * No support for indirect or multi-dimensional addressing.
 301                */
 302                assert( !inst->FullSrcRegisters[i].SrcRegisterInd.Indirect );
 303                assert( !inst->FullSrcRegisters[i].SrcRegisterInd.Dimension );
 304                assert( !inst->FullSrcRegisters[i].SrcRegisterInd.Extended );
 305             }
 306          }
 307       }
 308
 309       break;
 310    }
 311
 312    default:
 313       assert( 0 );
 314    }
 315 }
 316