src/gallium/auxiliary/tgsi/tgsi_parse.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 VMware, Inc.
   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 VMWARE 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    UNUSED struct tgsi_parse_context *ctx )
  55 {
  56 }
  57
  58 boolean
  59 tgsi_parse_end_of_tokens(
  60    struct tgsi_parse_context *ctx )
  61 {
  62    /* All values involved are unsigned, but the sum will be promoted to
  63     * a signed value (at least on 64 bit). To capture a possible overflow
  64     * make it a signed comparison.
  65     */
  66    return (int)ctx->Position >=
  67          ctx->FullHeader.Header.HeaderSize + ctx->FullHeader.Header.BodySize;
  68 }
  69
  70
  71 /**
  72  * This function is used to avoid and work-around type punning/aliasing
  73  * warnings.  The warnings seem harmless on x86 but on PPC they cause
  74  * real failures.
  75  */
  76 static inline void
  77 copy_token(void *dst, const void *src)
  78 {
  79    memcpy(dst, src, 4);
  80 }
  81
  82
  83 /**
  84  * Get next 4-byte token, return it at address specified by 'token'
  85  */
  86 static void
  87 next_token(
  88    struct tgsi_parse_context *ctx,
  89    void *token )
  90 {
  91    assert( !tgsi_parse_end_of_tokens( ctx ) );
  92    copy_token(token, &ctx->Tokens[ctx->Position]);
  93    ctx->Position++;
  94 }
  95
  96
  97 void
  98 tgsi_parse_token(
  99    struct tgsi_parse_context *ctx )
 100 {
 101    struct tgsi_token token;
 102    unsigned i;
 103
 104    next_token( ctx, &token );
 105
 106    switch( token.Type ) {
 107    case TGSI_TOKEN_TYPE_DECLARATION:
 108    {
 109       struct tgsi_full_declaration *decl = &ctx->FullToken.FullDeclaration;
 110
 111       memset(decl, 0, sizeof *decl);
 112       copy_token(&decl->Declaration, &token);
 113
 114       next_token( ctx, &decl->Range );
 115
 116       if (decl->Declaration.Dimension) {
 117          next_token(ctx, &decl->Dim);
 118       }
 119
 120       if (decl->Declaration.Interpolate) {
 121          next_token( ctx, &decl->Interp );
 122       }
 123
 124       if (decl->Declaration.Semantic) {
 125          next_token( ctx, &decl->Semantic );
 126       }
 127
 128       if (decl->Declaration.File == TGSI_FILE_IMAGE) {
 129          next_token(ctx, &decl->Image);
 130       }
 131
 132       if (decl->Declaration.File == TGSI_FILE_SAMPLER_VIEW) {
 133          next_token(ctx, &decl->SamplerView);
 134       }
 135
 136       if (decl->Declaration.Array) {
 137          next_token(ctx, &decl->Array);
 138       }
 139
 140       break;
 141    }
 142
 143    case TGSI_TOKEN_TYPE_IMMEDIATE:
 144    {
 145       struct tgsi_full_immediate *imm = &ctx->FullToken.FullImmediate;
 146       uint imm_count;
 147
 148       memset(imm, 0, sizeof *imm);
 149       copy_token(&imm->Immediate, &token);
 150
 151       imm_count = imm->Immediate.NrTokens - 1;
 152
 153       switch (imm->Immediate.DataType) {
 154       case TGSI_IMM_FLOAT32:
 155       case TGSI_IMM_FLOAT64:
 156          for (i = 0; i < imm_count; i++) {
 157             next_token(ctx, &imm->u[i].Float);
 158          }
 159          break;
 160
 161       case TGSI_IMM_UINT32:
 162       case TGSI_IMM_UINT64:
 163          for (i = 0; i < imm_count; i++) {
 164             next_token(ctx, &imm->u[i].Uint);
 165          }
 166          break;
 167
 168       case TGSI_IMM_INT32:
 169       case TGSI_IMM_INT64:
 170          for (i = 0; i < imm_count; i++) {
 171             next_token(ctx, &imm->u[i].Int);
 172          }
 173          break;
 174
 175       default:
 176          assert( 0 );
 177       }
 178
 179       break;
 180    }
 181
 182    case TGSI_TOKEN_TYPE_INSTRUCTION:
 183    {
 184       struct tgsi_full_instruction *inst = &ctx->FullToken.FullInstruction;
 185
 186       memset(inst, 0, sizeof *inst);
 187       copy_token(&inst->Instruction, &token);
 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       if (inst->Instruction.Memory) {
 201          next_token(ctx, &inst->Memory);
 202       }
 203
 204       assert( inst->Instruction.NumDstRegs <= TGSI_FULL_MAX_DST_REGISTERS );
 205
 206       for (i = 0; i < inst->Instruction.NumDstRegs; i++) {
 207
 208          next_token( ctx, &inst->Dst[i].Register );
 209
 210          if (inst->Dst[i].Register.Indirect)
 211             next_token( ctx, &inst->Dst[i].Indirect );
 212
 213          if (inst->Dst[i].Register.Dimension) {
 214             next_token( ctx, &inst->Dst[i].Dimension );
 215
 216             /*
 217              * No support for multi-dimensional addressing.
 218              */
 219             assert( !inst->Dst[i].Dimension.Dimension );
 220
 221             if (inst->Dst[i].Dimension.Indirect)
 222                next_token( ctx, &inst->Dst[i].DimIndirect );
 223          }
 224       }
 225
 226       assert( inst->Instruction.NumSrcRegs <= TGSI_FULL_MAX_SRC_REGISTERS );
 227
 228       for (i = 0; i < inst->Instruction.NumSrcRegs; i++) {
 229
 230          next_token( ctx, &inst->Src[i].Register );
 231
 232          if (inst->Src[i].Register.Indirect)
 233             next_token( ctx, &inst->Src[i].Indirect );
 234
 235          if (inst->Src[i].Register.Dimension) {
 236             next_token( ctx, &inst->Src[i].Dimension );
 237
 238             /*
 239              * No support for multi-dimensional addressing.
 240              */
 241             assert( !inst->Src[i].Dimension.Dimension );
 242
 243             if (inst->Src[i].Dimension.Indirect)
 244                next_token( ctx, &inst->Src[i].DimIndirect );
 245          }
 246       }
 247
 248       break;
 249    }
 250
 251    case TGSI_TOKEN_TYPE_PROPERTY:
 252    {
 253       struct tgsi_full_property *prop = &ctx->FullToken.FullProperty;
 254       uint prop_count;
 255
 256       memset(prop, 0, sizeof *prop);
 257       copy_token(&prop->Property, &token);
 258
 259       prop_count = prop->Property.NrTokens - 1;
 260       for (i = 0; i < prop_count; i++) {
 261          next_token(ctx, &prop->u[i]);
 262       }
 263
 264       break;
 265    }
 266
 267    default:
 268       assert( 0 );
 269    }
 270 }
 271
 272
 273
 274
 275 /**
 276  * Make a new copy of a token array.
 277  */
 278 struct tgsi_token *
 279 tgsi_dup_tokens(const struct tgsi_token *tokens)
 280 {
 281    unsigned n = tgsi_num_tokens(tokens);
 282    unsigned bytes = n * sizeof(struct tgsi_token);
 283    struct tgsi_token *new_tokens = (struct tgsi_token *) MALLOC(bytes);
 284    if (new_tokens)
 285       memcpy(new_tokens, tokens, bytes);
 286    return new_tokens;
 287 }
 288
 289
 290 /**
 291  * Allocate memory for num_tokens tokens.
 292  */
 293 struct tgsi_token *
 294 tgsi_alloc_tokens(unsigned num_tokens)
 295 {
 296    unsigned bytes = num_tokens * sizeof(struct tgsi_token);
 297    return (struct tgsi_token *) MALLOC(bytes);
 298 }
 299
 300
 301 /**
 302  * Free tokens allocated by tgsi_alloc_tokens() or tgsi_dup_tokens()
 303  */
 304 void
 305 tgsi_free_tokens(const struct tgsi_token *tokens)
 306 {
 307    FREE((void *) tokens);
 308 }
 309
 310
 311 void
 312 tgsi_dump_tokens(const struct tgsi_token *tokens)
 313 {
 314    const unsigned *dwords = (const unsigned *)tokens;
 315    int nr = tgsi_num_tokens(tokens);
 316    int i;
 317
 318    STATIC_ASSERT(sizeof(*tokens) == sizeof(unsigned));
 319
 320    debug_printf("const unsigned tokens[%d] = {\n", nr);
 321    for (i = 0; i < nr; i++)
 322       debug_printf("0x%08x,\n", dwords[i]);
 323    debug_printf("};\n");
 324 }
 325
 326 unsigned
 327 tgsi_get_processor_type(const struct tgsi_token *tokens)
 328 {
 329    struct tgsi_parse_context parse;
 330
 331    if (tgsi_parse_init( &parse, tokens ) != TGSI_PARSE_OK) {
 332       debug_printf("tgsi_parse_init() failed in %s:%i!\n", __func__, __LINE__);
 333       return ~0;
 334    }
 335    return parse.FullHeader.Processor.Processor;
 336 }