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 "util/u_debug.h"
  29 #include "pipe/p_shader_tokens.h"
  30 #include "tgsi_parse.h"
  31 #include "util/u_memory.h"
  32
  33 unsigned
  34 tgsi_parse_init(
  35    struct tgsi_parse_context *ctx,
  36    const struct tgsi_token *tokens )
  37 {
  38    ctx->FullHeader.Header = *(struct tgsi_header *) &tokens[0];
  39    if( ctx->FullHeader.Header.HeaderSize >= 2 ) {
  40       ctx->FullHeader.Processor = *(struct tgsi_processor *) &tokens[1];
  41    }
  42    else {
  43       return TGSI_PARSE_ERROR;
  44    }
  45
  46    ctx->Tokens = tokens;
  47    ctx->Position = ctx->FullHeader.Header.HeaderSize;
  48
  49    return TGSI_PARSE_OK;
  50 }
  51
  52 void
  53 tgsi_parse_free(
  54    struct tgsi_parse_context *ctx )
  55 {
  56 }
  57
  58 boolean
  59 tgsi_parse_end_of_tokens(
  60    struct tgsi_parse_context *ctx )
  61 {
  62    return ctx->Position >=
  63       ctx->FullHeader.Header.HeaderSize + ctx->FullHeader.Header.BodySize;
  64 }
  65
  66
  67 /**
  68  * This function is used to avoid and work-around type punning/aliasing
  69  * warnings.  The warnings seem harmless on x86 but on PPC they cause
  70  * real failures.
  71  */
  72 static INLINE void
  73 copy_token(void *dst, const void *src)
  74 {
  75    memcpy(dst, src, 4);
  76 }
  77
  78
  79 /**
  80  * Get next 4-byte token, return it at address specified by 'token'
  81  */
  82 static void
  83 next_token(
  84    struct tgsi_parse_context *ctx,
  85    void *token )
  86 {
  87    assert( !tgsi_parse_end_of_tokens( ctx ) );
  88    copy_token(token, &ctx->Tokens[ctx->Position]);
  89    ctx->Position++;
  90 }
  91
  92
  93 void
  94 tgsi_parse_token(
  95    struct tgsi_parse_context *ctx )
  96 {
  97    struct tgsi_token token;
  98    unsigned i;
  99
 100    next_token( ctx, &token );
 101
 102    switch( token.Type ) {
 103    case TGSI_TOKEN_TYPE_DECLARATION:
 104    {
 105       struct tgsi_full_declaration *decl = &ctx->FullToken.FullDeclaration;
 106
 107       memset(decl, 0, sizeof *decl);
 108       copy_token(&decl->Declaration, &token);
 109
 110       next_token( ctx, &decl->Range );
 111
 112       if (decl->Declaration.Dimension) {
 113          next_token(ctx, &decl->Dim);
 114       }
 115
 116       if( decl->Declaration.Semantic ) {
 117          next_token( ctx, &decl->Semantic );
 118       }
 119
 120       if (decl->Declaration.File == TGSI_FILE_IMMEDIATE_ARRAY) {
 121          unsigned i, j;
 122          decl->ImmediateData.u = (union tgsi_immediate_data*)
 123                                  &ctx->Tokens[ctx->Position];
 124          for (i = 0; i <= decl->Range.Last; ++i) {
 125             for (j = 0; j < 4; ++j) {
 126                ctx->Position++;
 127             }
 128          }
 129       }
 130
 131       if (decl->Declaration.File == TGSI_FILE_RESOURCE) {
 132          next_token(ctx, &decl->Resource);
 133       }
 134
 135       if (decl->Declaration.File == TGSI_FILE_SAMPLER_VIEW) {
 136          next_token(ctx, &decl->SamplerView);
 137       }
 138
 139       break;
 140    }
 141
 142    case TGSI_TOKEN_TYPE_IMMEDIATE:
 143    {
 144       struct tgsi_full_immediate *imm = &ctx->FullToken.FullImmediate;
 145       uint imm_count;
 146
 147       memset(imm, 0, sizeof *imm);
 148       copy_token(&imm->Immediate, &token);
 149
 150       imm_count = imm->Immediate.NrTokens - 1;
 151
 152       switch (imm->Immediate.DataType) {
 153       case TGSI_IMM_FLOAT32:
 154          for (i = 0; i < imm_count; i++) {
 155             next_token(ctx, &imm->u[i].Float);
 156          }
 157          break;
 158
 159       case TGSI_IMM_UINT32:
 160          for (i = 0; i < imm_count; i++) {
 161             next_token(ctx, &imm->u[i].Uint);
 162          }
 163          break;
 164
 165       case TGSI_IMM_INT32:
 166          for (i = 0; i < imm_count; i++) {
 167             next_token(ctx, &imm->u[i].Int);
 168          }
 169          break;
 170
 171       default:
 172          assert( 0 );
 173       }
 174
 175       break;
 176    }
 177
 178    case TGSI_TOKEN_TYPE_INSTRUCTION:
 179    {
 180       struct tgsi_full_instruction *inst = &ctx->FullToken.FullInstruction;
 181
 182       memset(inst, 0, sizeof *inst);
 183       copy_token(&inst->Instruction, &token);
 184
 185       if (inst->Instruction.Predicate) {
 186          next_token(ctx, &inst->Predicate);
 187       }
 188
 189       if (inst->Instruction.Label) {
 190          next_token( ctx, &inst->Label);
 191       }
 192
 193       if (inst->Instruction.Texture) {
 194          next_token( ctx, &inst->Texture);
 195          for( i = 0; i < inst->Texture.NumOffsets; i++ ) {
 196             next_token( ctx, &inst->TexOffsets[i] );
 197          }
 198       }
 199
 200       assert( inst->Instruction.NumDstRegs <= TGSI_FULL_MAX_DST_REGISTERS );
 201
 202       for(  i = 0; i < inst->Instruction.NumDstRegs; i++ ) {
 203
 204          next_token( ctx, &inst->Dst[i].Register );
 205
 206          if( inst->Dst[i].Register.Indirect ) {
 207             next_token( ctx, &inst->Dst[i].Indirect );
 208
 209             /*
 210              * No support for indirect or multi-dimensional addressing.
 211              */
 212             assert( !inst->Dst[i].Indirect.Dimension );
 213             assert( !inst->Dst[i].Indirect.Indirect );
 214          }
 215          if( inst->Dst[i].Register.Dimension ) {
 216             next_token( ctx, &inst->Dst[i].Dimension );
 217
 218             /*
 219              * No support for multi-dimensional addressing.
 220              */
 221             assert( !inst->Dst[i].Dimension.Dimension );
 222
 223             if( inst->Dst[i].Dimension.Indirect ) {
 224                next_token( ctx, &inst->Dst[i].DimIndirect );
 225
 226                /*
 227                 * No support for indirect or multi-dimensional addressing.
 228                 */
 229                assert( !inst->Dst[i].Indirect.Indirect );
 230                assert( !inst->Dst[i].Indirect.Dimension );
 231             }
 232          }
 233       }
 234
 235       assert( inst->Instruction.NumSrcRegs <= TGSI_FULL_MAX_SRC_REGISTERS );
 236
 237       for( i = 0; i < inst->Instruction.NumSrcRegs; i++ ) {
 238
 239          next_token( ctx, &inst->Src[i].Register );
 240
 241          if( inst->Src[i].Register.Indirect ) {
 242             next_token( ctx, &inst->Src[i].Indirect );
 243
 244             /*
 245              * No support for indirect or multi-dimensional addressing.
 246              */
 247             assert( !inst->Src[i].Indirect.Indirect );
 248             assert( !inst->Src[i].Indirect.Dimension );
 249          }
 250
 251          if( inst->Src[i].Register.Dimension ) {
 252             next_token( ctx, &inst->Src[i].Dimension );
 253
 254             /*
 255              * No support for multi-dimensional addressing.
 256              */
 257             assert( !inst->Src[i].Dimension.Dimension );
 258
 259             if( inst->Src[i].Dimension.Indirect ) {
 260                next_token( ctx, &inst->Src[i].DimIndirect );
 261
 262                /*
 263                * No support for indirect or multi-dimensional addressing.
 264                */
 265                assert( !inst->Src[i].Indirect.Indirect );
 266                assert( !inst->Src[i].Indirect.Dimension );
 267             }
 268          }
 269       }
 270
 271       break;
 272    }
 273
 274    case TGSI_TOKEN_TYPE_PROPERTY:
 275    {
 276       struct tgsi_full_property *prop = &ctx->FullToken.FullProperty;
 277       uint prop_count;
 278
 279       memset(prop, 0, sizeof *prop);
 280       copy_token(&prop->Property, &token);
 281
 282       prop_count = prop->Property.NrTokens - 1;
 283       for (i = 0; i < prop_count; i++) {
 284          next_token(ctx, &prop->u[i]);
 285       }
 286
 287       break;
 288    }
 289
 290    default:
 291       assert( 0 );
 292    }
 293 }
 294
 295
 296
 297
 298 /**
 299  * Make a new copy of a token array.
 300  */
 301 struct tgsi_token *
 302 tgsi_dup_tokens(const struct tgsi_token *tokens)
 303 {
 304    unsigned n = tgsi_num_tokens(tokens);
 305    unsigned bytes = n * sizeof(struct tgsi_token);
 306    struct tgsi_token *new_tokens = (struct tgsi_token *) MALLOC(bytes);
 307    if (new_tokens)
 308       memcpy(new_tokens, tokens, bytes);
 309    return new_tokens;
 310 }
 311
 312
 313 /**
 314  * Allocate memory for num_tokens tokens.
 315  */
 316 struct tgsi_token *
 317 tgsi_alloc_tokens(unsigned num_tokens)
 318 {
 319    unsigned bytes = num_tokens * sizeof(struct tgsi_token);
 320    return (struct tgsi_token *) MALLOC(bytes);
 321 }
 322
 323
 324 void
 325 tgsi_dump_tokens(const struct tgsi_token *tokens)
 326 {
 327    const unsigned *dwords = (const unsigned *)tokens;
 328    int nr = tgsi_num_tokens(tokens);
 329    int i;
 330
 331    assert(sizeof(*tokens) == sizeof(unsigned));
 332
 333    debug_printf("const unsigned tokens[%d] = {\n", nr);
 334    for (i = 0; i < nr; i++)
 335       debug_printf("0x%08x,\n", dwords[i]);
 336    debug_printf("};\n");
 337 }