src/gallium/auxiliary/tgsi/util/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 "pipe/p_debug.h"
  29 #include "pipe/p_util.h"
  30 #include "pipe/p_shader_tokens.h"
  31 #include "tgsi_parse.h"
  32 #include "tgsi_build.h"
  33
  34 void
  35 tgsi_full_token_init(
  36    union tgsi_full_token *full_token )
  37 {
  38    full_token->Token.Type = TGSI_TOKEN_TYPE_DECLARATION;
  39 }
  40
  41 void
  42 tgsi_full_token_free(
  43    union tgsi_full_token *full_token )
  44 {
  45    if( full_token->Token.Type == TGSI_TOKEN_TYPE_IMMEDIATE ) {
  46       FREE( (void *) full_token->FullImmediate.u.Pointer );
  47    }
  48 }
  49
  50 unsigned
  51 tgsi_parse_init(
  52    struct tgsi_parse_context *ctx,
  53    const struct tgsi_token *tokens )
  54 {
  55    ctx->FullVersion.Version = *(struct tgsi_version *) &tokens[0];
  56    if( ctx->FullVersion.Version.MajorVersion > 1 ) {
  57       return TGSI_PARSE_ERROR;
  58    }
  59
  60    ctx->FullHeader.Header = *(struct tgsi_header *) &tokens[1];
  61    if( ctx->FullHeader.Header.HeaderSize >= 2 ) {
  62       ctx->FullHeader.Processor = *(struct tgsi_processor *) &tokens[2];
  63    }
  64    else {
  65       ctx->FullHeader.Processor = tgsi_default_processor();
  66    }
  67
  68    ctx->Tokens = tokens;
  69    ctx->Position = 1 + ctx->FullHeader.Header.HeaderSize;
  70
  71    tgsi_full_token_init( &ctx->FullToken );
  72
  73    return TGSI_PARSE_OK;
  74 }
  75
  76 void
  77 tgsi_parse_free(
  78    struct tgsi_parse_context *ctx )
  79 {
  80    tgsi_full_token_free( &ctx->FullToken );
  81 }
  82
  83 boolean
  84 tgsi_parse_end_of_tokens(
  85    struct tgsi_parse_context *ctx )
  86 {
  87    return ctx->Position >=
  88       1 + ctx->FullHeader.Header.HeaderSize + ctx->FullHeader.Header.BodySize;
  89 }
  90
  91 static void
  92 next_token(
  93    struct tgsi_parse_context *ctx,
  94    void *token )
  95 {
  96    assert( !tgsi_parse_end_of_tokens( ctx ) );
  97
  98    *(struct tgsi_token *) token = ctx->Tokens[ctx->Position++];
  99 }
 100
 101 void
 102 tgsi_parse_token(
 103    struct tgsi_parse_context *ctx )
 104 {
 105    struct tgsi_token token;
 106    unsigned i;
 107
 108    tgsi_full_token_free( &ctx->FullToken );
 109    tgsi_full_token_init( &ctx->FullToken );
 110
 111    next_token( ctx, &token );
 112
 113    switch( token.Type ) {
 114    case TGSI_TOKEN_TYPE_DECLARATION:
 115    {
 116       struct tgsi_full_declaration *decl = &ctx->FullToken.FullDeclaration;
 117
 118       *decl = tgsi_default_full_declaration();
 119       decl->Declaration = *(struct tgsi_declaration *) &token;
 120
 121       switch( decl->Declaration.Type ) {
 122       case TGSI_DECLARE_RANGE:
 123          next_token( ctx, &decl->u.DeclarationRange );
 124          break;
 125
 126       case TGSI_DECLARE_MASK:
 127          next_token( ctx, &decl->u.DeclarationMask );
 128          break;
 129
 130       default:
 131          assert (0);
 132       }
 133
 134       if( decl->Declaration.Interpolate ) {
 135          next_token( ctx, &decl->Interpolation );
 136       }
 137
 138       if( decl->Declaration.Semantic ) {
 139          next_token( ctx, &decl->Semantic );
 140       }
 141
 142       break;
 143    }
 144
 145    case TGSI_TOKEN_TYPE_IMMEDIATE:
 146    {
 147       struct tgsi_full_immediate *imm = &ctx->FullToken.FullImmediate;
 148
 149       *imm = tgsi_default_full_immediate();
 150       imm->Immediate = *(struct tgsi_immediate *) &token;
 151
 152       assert( !imm->Immediate.Extended );
 153
 154       switch (imm->Immediate.DataType) {
 155       case TGSI_IMM_FLOAT32:
 156          imm->u.Pointer = MALLOC(
 157             sizeof( struct tgsi_immediate_float32 ) * (imm->Immediate.Size - 1) );
 158          for( i = 0; i < imm->Immediate.Size - 1; i++ ) {
 159             next_token( ctx, (struct tgsi_immediate_float32 *) &imm->u.ImmediateFloat32[i] );
 160          }
 161          break;
 162
 163       default:
 164          assert( 0 );
 165       }
 166
 167       break;
 168    }
 169
 170    case TGSI_TOKEN_TYPE_INSTRUCTION:
 171    {
 172       struct tgsi_full_instruction *inst = &ctx->FullToken.FullInstruction;
 173       unsigned extended;
 174
 175       *inst = tgsi_default_full_instruction();
 176       inst->Instruction = *(struct tgsi_instruction *) &token;
 177
 178       extended = inst->Instruction.Extended;
 179
 180       while( extended ) {
 181          struct tgsi_src_register_ext token;
 182
 183          next_token( ctx, &token );
 184
 185          switch( token.Type ) {
 186          case TGSI_INSTRUCTION_EXT_TYPE_NV:
 187             inst->InstructionExtNv =
 188                *(struct tgsi_instruction_ext_nv *) &token;
 189             break;
 190
 191          case TGSI_INSTRUCTION_EXT_TYPE_LABEL:
 192             inst->InstructionExtLabel =
 193                *(struct tgsi_instruction_ext_label *) &token;
 194             break;
 195
 196          case TGSI_INSTRUCTION_EXT_TYPE_TEXTURE:
 197             inst->InstructionExtTexture =
 198                *(struct tgsi_instruction_ext_texture *) &token;
 199             break;
 200
 201          default:
 202             assert( 0 );
 203          }
 204
 205          extended = token.Extended;
 206       }
 207
 208       assert( inst->Instruction.NumDstRegs <= TGSI_FULL_MAX_DST_REGISTERS );
 209
 210       for(  i = 0; i < inst->Instruction.NumDstRegs; i++ ) {
 211          unsigned extended;
 212
 213          next_token( ctx, &inst->FullDstRegisters[i].DstRegister );
 214
 215          /*
 216           * No support for indirect or multi-dimensional addressing.
 217           */
 218          assert( !inst->FullDstRegisters[i].DstRegister.Indirect );
 219          assert( !inst->FullDstRegisters[i].DstRegister.Dimension );
 220
 221          extended = inst->FullDstRegisters[i].DstRegister.Extended;
 222
 223          while( extended ) {
 224             struct tgsi_src_register_ext token;
 225
 226             next_token( ctx, &token );
 227
 228             switch( token.Type ) {
 229             case TGSI_DST_REGISTER_EXT_TYPE_CONDCODE:
 230                inst->FullDstRegisters[i].DstRegisterExtConcode =
 231                   *(struct tgsi_dst_register_ext_concode *) &token;
 232                break;
 233
 234             case TGSI_DST_REGISTER_EXT_TYPE_MODULATE:
 235                inst->FullDstRegisters[i].DstRegisterExtModulate =
 236                   *(struct tgsi_dst_register_ext_modulate *) &token;
 237                break;
 238
 239             default:
 240                assert( 0 );
 241             }
 242
 243             extended = token.Extended;
 244          }
 245       }
 246
 247       assert( inst->Instruction.NumSrcRegs <= TGSI_FULL_MAX_SRC_REGISTERS );
 248
 249       for( i = 0; i < inst->Instruction.NumSrcRegs; i++ ) {
 250          unsigned extended;
 251
 252          next_token( ctx, &inst->FullSrcRegisters[i].SrcRegister );
 253
 254          extended = inst->FullSrcRegisters[i].SrcRegister.Extended;
 255
 256          while( extended ) {
 257             struct tgsi_src_register_ext token;
 258
 259             next_token( ctx, &token );
 260
 261             switch( token.Type ) {
 262             case TGSI_SRC_REGISTER_EXT_TYPE_SWZ:
 263                inst->FullSrcRegisters[i].SrcRegisterExtSwz =
 264                   *(struct tgsi_src_register_ext_swz *) &token;
 265                break;
 266
 267             case TGSI_SRC_REGISTER_EXT_TYPE_MOD:
 268                inst->FullSrcRegisters[i].SrcRegisterExtMod =
 269                   *(struct tgsi_src_register_ext_mod *) &token;
 270                break;
 271
 272             default:
 273                assert( 0 );
 274             }
 275
 276             extended = token.Extended;
 277          }
 278
 279          if( inst->FullSrcRegisters[i].SrcRegister.Indirect ) {
 280             next_token( ctx, &inst->FullSrcRegisters[i].SrcRegisterInd );
 281
 282             /*
 283              * No support for indirect or multi-dimensional addressing.
 284              */
 285             assert( !inst->FullSrcRegisters[i].SrcRegisterInd.Indirect );
 286             assert( !inst->FullSrcRegisters[i].SrcRegisterInd.Dimension );
 287             assert( !inst->FullSrcRegisters[i].SrcRegisterInd.Extended );
 288          }
 289
 290          if( inst->FullSrcRegisters[i].SrcRegister.Dimension ) {
 291             next_token( ctx, &inst->FullSrcRegisters[i].SrcRegisterDim );
 292
 293             /*
 294              * No support for multi-dimensional addressing.
 295              */
 296             assert( !inst->FullSrcRegisters[i].SrcRegisterDim.Dimension );
 297             assert( !inst->FullSrcRegisters[i].SrcRegisterDim.Extended );
 298
 299             if( inst->FullSrcRegisters[i].SrcRegisterDim.Indirect ) {
 300                next_token( ctx, &inst->FullSrcRegisters[i].SrcRegisterDimInd );
 301
 302                /*
 303                * No support for indirect or multi-dimensional addressing.
 304                */
 305                assert( !inst->FullSrcRegisters[i].SrcRegisterInd.Indirect );
 306                assert( !inst->FullSrcRegisters[i].SrcRegisterInd.Dimension );
 307                assert( !inst->FullSrcRegisters[i].SrcRegisterInd.Extended );
 308             }
 309          }
 310       }
 311
 312       break;
 313    }
 314
 315    default:
 316       assert( 0 );
 317    }
 318 }
 319
 320
 321 unsigned
 322 tgsi_num_tokens(const struct tgsi_token *tokens)
 323 {
 324    struct tgsi_parse_context ctx;
 325    if (tgsi_parse_init(&ctx, tokens) == TGSI_PARSE_OK) {
 326       unsigned len = (ctx.FullHeader.Header.HeaderSize +
 327                       ctx.FullHeader.Header.BodySize +
 328                       1);
 329       return len;
 330    }
 331    return 0;
 332 }
 333
 334
 335 /**
 336  * Make a new copy of a token array.
 337  */
 338 struct tgsi_token *
 339 tgsi_dup_tokens(const struct tgsi_token *tokens)
 340 {
 341    unsigned n = tgsi_num_tokens(tokens);
 342    unsigned bytes = n * sizeof(struct tgsi_token);
 343    struct tgsi_token *new_tokens = (struct tgsi_token *) MALLOC(bytes);
 344    if (new_tokens)
 345       memcpy(new_tokens, tokens, bytes);
 346    return new_tokens;
 347 }