src/gallium/auxiliary/tgsi/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_shader_tokens.h"
  30 #include "tgsi_parse.h"
  31 #include "tgsi_build.h"
  32 #include "util/u_memory.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       next_token( ctx, &decl->DeclarationRange );
 122
 123       if( decl->Declaration.Semantic ) {
 124          next_token( ctx, &decl->Semantic );
 125       }
 126
 127       break;
 128    }
 129
 130    case TGSI_TOKEN_TYPE_IMMEDIATE:
 131    {
 132       struct tgsi_full_immediate *imm = &ctx->FullToken.FullImmediate;
 133
 134       *imm = tgsi_default_full_immediate();
 135       imm->Immediate = *(struct tgsi_immediate *) &token;
 136
 137       assert( !imm->Immediate.Extended );
 138
 139       switch (imm->Immediate.DataType) {
 140       case TGSI_IMM_FLOAT32:
 141          imm->u.Pointer = MALLOC(
 142             sizeof( struct tgsi_immediate_float32 ) * (imm->Immediate.Size - 1) );
 143          for( i = 0; i < imm->Immediate.Size - 1; i++ ) {
 144             next_token( ctx, (struct tgsi_immediate_float32 *) &imm->u.ImmediateFloat32[i] );
 145          }
 146          break;
 147
 148       default:
 149          assert( 0 );
 150       }
 151
 152       break;
 153    }
 154
 155    case TGSI_TOKEN_TYPE_INSTRUCTION:
 156    {
 157       struct tgsi_full_instruction *inst = &ctx->FullToken.FullInstruction;
 158       unsigned extended;
 159
 160       *inst = tgsi_default_full_instruction();
 161       inst->Instruction = *(struct tgsi_instruction *) &token;
 162
 163       extended = inst->Instruction.Extended;
 164
 165       while( extended ) {
 166          struct tgsi_src_register_ext token;
 167
 168          next_token( ctx, &token );
 169
 170          switch( token.Type ) {
 171          case TGSI_INSTRUCTION_EXT_TYPE_NV:
 172             inst->InstructionExtNv =
 173                *(struct tgsi_instruction_ext_nv *) &token;
 174             break;
 175
 176          case TGSI_INSTRUCTION_EXT_TYPE_LABEL:
 177             inst->InstructionExtLabel =
 178                *(struct tgsi_instruction_ext_label *) &token;
 179             break;
 180
 181          case TGSI_INSTRUCTION_EXT_TYPE_TEXTURE:
 182             inst->InstructionExtTexture =
 183                *(struct tgsi_instruction_ext_texture *) &token;
 184             break;
 185
 186          default:
 187             assert( 0 );
 188          }
 189
 190          extended = token.Extended;
 191       }
 192
 193       assert( inst->Instruction.NumDstRegs <= TGSI_FULL_MAX_DST_REGISTERS );
 194
 195       for(  i = 0; i < inst->Instruction.NumDstRegs; i++ ) {
 196          unsigned extended;
 197
 198          next_token( ctx, &inst->FullDstRegisters[i].DstRegister );
 199
 200          /*
 201           * No support for indirect or multi-dimensional addressing.
 202           */
 203          assert( !inst->FullDstRegisters[i].DstRegister.Indirect );
 204          assert( !inst->FullDstRegisters[i].DstRegister.Dimension );
 205
 206          extended = inst->FullDstRegisters[i].DstRegister.Extended;
 207
 208          while( extended ) {
 209             struct tgsi_src_register_ext token;
 210
 211             next_token( ctx, &token );
 212
 213             switch( token.Type ) {
 214             case TGSI_DST_REGISTER_EXT_TYPE_CONDCODE:
 215                inst->FullDstRegisters[i].DstRegisterExtConcode =
 216                   *(struct tgsi_dst_register_ext_concode *) &token;
 217                break;
 218
 219             case TGSI_DST_REGISTER_EXT_TYPE_MODULATE:
 220                inst->FullDstRegisters[i].DstRegisterExtModulate =
 221                   *(struct tgsi_dst_register_ext_modulate *) &token;
 222                break;
 223
 224             default:
 225                assert( 0 );
 226             }
 227
 228             extended = token.Extended;
 229          }
 230       }
 231
 232       assert( inst->Instruction.NumSrcRegs <= TGSI_FULL_MAX_SRC_REGISTERS );
 233
 234       for( i = 0; i < inst->Instruction.NumSrcRegs; i++ ) {
 235          unsigned extended;
 236
 237          next_token( ctx, &inst->FullSrcRegisters[i].SrcRegister );
 238
 239          extended = inst->FullSrcRegisters[i].SrcRegister.Extended;
 240
 241          while( extended ) {
 242             struct tgsi_src_register_ext token;
 243
 244             next_token( ctx, &token );
 245
 246             switch( token.Type ) {
 247             case TGSI_SRC_REGISTER_EXT_TYPE_SWZ:
 248                inst->FullSrcRegisters[i].SrcRegisterExtSwz =
 249                   *(struct tgsi_src_register_ext_swz *) &token;
 250                break;
 251
 252             case TGSI_SRC_REGISTER_EXT_TYPE_MOD:
 253                inst->FullSrcRegisters[i].SrcRegisterExtMod =
 254                   *(struct tgsi_src_register_ext_mod *) &token;
 255                break;
 256
 257             default:
 258                assert( 0 );
 259             }
 260
 261             extended = token.Extended;
 262          }
 263
 264          if( inst->FullSrcRegisters[i].SrcRegister.Indirect ) {
 265             next_token( ctx, &inst->FullSrcRegisters[i].SrcRegisterInd );
 266
 267             /*
 268              * No support for indirect or multi-dimensional addressing.
 269              */
 270             assert( !inst->FullSrcRegisters[i].SrcRegisterInd.Indirect );
 271             assert( !inst->FullSrcRegisters[i].SrcRegisterInd.Dimension );
 272             assert( !inst->FullSrcRegisters[i].SrcRegisterInd.Extended );
 273          }
 274
 275          if( inst->FullSrcRegisters[i].SrcRegister.Dimension ) {
 276             next_token( ctx, &inst->FullSrcRegisters[i].SrcRegisterDim );
 277
 278             /*
 279              * No support for multi-dimensional addressing.
 280              */
 281             assert( !inst->FullSrcRegisters[i].SrcRegisterDim.Dimension );
 282             assert( !inst->FullSrcRegisters[i].SrcRegisterDim.Extended );
 283
 284             if( inst->FullSrcRegisters[i].SrcRegisterDim.Indirect ) {
 285                next_token( ctx, &inst->FullSrcRegisters[i].SrcRegisterDimInd );
 286
 287                /*
 288                * No support for indirect or multi-dimensional addressing.
 289                */
 290                assert( !inst->FullSrcRegisters[i].SrcRegisterInd.Indirect );
 291                assert( !inst->FullSrcRegisters[i].SrcRegisterInd.Dimension );
 292                assert( !inst->FullSrcRegisters[i].SrcRegisterInd.Extended );
 293             }
 294          }
 295       }
 296
 297       break;
 298    }
 299
 300    default:
 301       assert( 0 );
 302    }
 303 }
 304
 305
 306 unsigned
 307 tgsi_num_tokens(const struct tgsi_token *tokens)
 308 {
 309    struct tgsi_parse_context ctx;
 310    if (tgsi_parse_init(&ctx, tokens) == TGSI_PARSE_OK) {
 311       unsigned len = (ctx.FullHeader.Header.HeaderSize +
 312                       ctx.FullHeader.Header.BodySize +
 313                       1);
 314       return len;
 315    }
 316    return 0;
 317 }
 318
 319
 320 /**
 321  * Make a new copy of a token array.
 322  */
 323 struct tgsi_token *
 324 tgsi_dup_tokens(const struct tgsi_token *tokens)
 325 {
 326    unsigned n = tgsi_num_tokens(tokens);
 327    unsigned bytes = n * sizeof(struct tgsi_token);
 328    struct tgsi_token *new_tokens = (struct tgsi_token *) MALLOC(bytes);
 329    if (new_tokens)
 330       memcpy(new_tokens, tokens, bytes);
 331    return new_tokens;
 332 }