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    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.Interpolate) {
 117          next_token( ctx, &decl->Interp );
 118       }
 119
 120       if (decl->Declaration.Semantic) {
 121          next_token( ctx, &decl->Semantic );
 122       }
 123
 124       if (decl->Declaration.File == TGSI_FILE_IMAGE) {
 125          next_token(ctx, &decl->Image);
 126       }
 127
 128       if (decl->Declaration.File == TGSI_FILE_SAMPLER_VIEW) {
 129          next_token(ctx, &decl->SamplerView);
 130       }
 131
 132       if (decl->Declaration.Array) {
 133          next_token(ctx, &decl->Array);
 134       }
 135
 136       break;
 137    }
 138
 139    case TGSI_TOKEN_TYPE_IMMEDIATE:
 140    {
 141       struct tgsi_full_immediate *imm = &ctx->FullToken.FullImmediate;
 142       uint imm_count;
 143
 144       memset(imm, 0, sizeof *imm);
 145       copy_token(&imm->Immediate, &token);
 146
 147       imm_count = imm->Immediate.NrTokens - 1;
 148
 149       switch (imm->Immediate.DataType) {
 150       case TGSI_IMM_FLOAT32:
 151       case TGSI_IMM_FLOAT64:
 152          for (i = 0; i < imm_count; i++) {
 153             next_token(ctx, &imm->u[i].Float);
 154          }
 155          break;
 156
 157       case TGSI_IMM_UINT32:
 158          for (i = 0; i < imm_count; i++) {
 159             next_token(ctx, &imm->u[i].Uint);
 160          }
 161          break;
 162
 163       case TGSI_IMM_INT32:
 164          for (i = 0; i < imm_count; i++) {
 165             next_token(ctx, &imm->u[i].Int);
 166          }
 167          break;
 168
 169       default:
 170          assert( 0 );
 171       }
 172
 173       break;
 174    }
 175
 176    case TGSI_TOKEN_TYPE_INSTRUCTION:
 177    {
 178       struct tgsi_full_instruction *inst = &ctx->FullToken.FullInstruction;
 179
 180       memset(inst, 0, sizeof *inst);
 181       copy_token(&inst->Instruction, &token);
 182
 183       if (inst->Instruction.Predicate) {
 184          next_token(ctx, &inst->Predicate);
 185       }
 186
 187       if (inst->Instruction.Label) {
 188          next_token( ctx, &inst->Label);
 189       }
 190
 191       if (inst->Instruction.Texture) {
 192          next_token( ctx, &inst->Texture);
 193          for (i = 0; i < inst->Texture.NumOffsets; i++) {
 194             next_token( ctx, &inst->TexOffsets[i] );
 195          }
 196       }
 197
 198       if (inst->Instruction.Memory) {
 199          next_token(ctx, &inst->Memory);
 200       }
 201
 202       assert( inst->Instruction.NumDstRegs <= TGSI_FULL_MAX_DST_REGISTERS );
 203
 204       for (i = 0; i < inst->Instruction.NumDstRegs; i++) {
 205
 206          next_token( ctx, &inst->Dst[i].Register );
 207
 208          if (inst->Dst[i].Register.Indirect)
 209             next_token( ctx, &inst->Dst[i].Indirect );
 210
 211          if (inst->Dst[i].Register.Dimension) {
 212             next_token( ctx, &inst->Dst[i].Dimension );
 213
 214             /*
 215              * No support for multi-dimensional addressing.
 216              */
 217             assert( !inst->Dst[i].Dimension.Dimension );
 218
 219             if (inst->Dst[i].Dimension.Indirect)
 220                next_token( ctx, &inst->Dst[i].DimIndirect );
 221          }
 222       }
 223
 224       assert( inst->Instruction.NumSrcRegs <= TGSI_FULL_MAX_SRC_REGISTERS );
 225
 226       for (i = 0; i < inst->Instruction.NumSrcRegs; i++) {
 227
 228          next_token( ctx, &inst->Src[i].Register );
 229
 230          if (inst->Src[i].Register.Indirect)
 231             next_token( ctx, &inst->Src[i].Indirect );
 232
 233          if (inst->Src[i].Register.Dimension) {
 234             next_token( ctx, &inst->Src[i].Dimension );
 235
 236             /*
 237              * No support for multi-dimensional addressing.
 238              */
 239             assert( !inst->Src[i].Dimension.Dimension );
 240
 241             if (inst->Src[i].Dimension.Indirect)
 242                next_token( ctx, &inst->Src[i].DimIndirect );
 243          }
 244       }
 245
 246       break;
 247    }
 248
 249    case TGSI_TOKEN_TYPE_PROPERTY:
 250    {
 251       struct tgsi_full_property *prop = &ctx->FullToken.FullProperty;
 252       uint prop_count;
 253
 254       memset(prop, 0, sizeof *prop);
 255       copy_token(&prop->Property, &token);
 256
 257       prop_count = prop->Property.NrTokens - 1;
 258       for (i = 0; i < prop_count; i++) {
 259          next_token(ctx, &prop->u[i]);
 260       }
 261
 262       break;
 263    }
 264
 265    default:
 266       assert( 0 );
 267    }
 268 }
 269
 270
 271
 272
 273 /**
 274  * Make a new copy of a token array.
 275  */
 276 struct tgsi_token *
 277 tgsi_dup_tokens(const struct tgsi_token *tokens)
 278 {
 279    unsigned n = tgsi_num_tokens(tokens);
 280    unsigned bytes = n * sizeof(struct tgsi_token);
 281    struct tgsi_token *new_tokens = (struct tgsi_token *) MALLOC(bytes);
 282    if (new_tokens)
 283       memcpy(new_tokens, tokens, bytes);
 284    return new_tokens;
 285 }
 286
 287
 288 /**
 289  * Allocate memory for num_tokens tokens.
 290  */
 291 struct tgsi_token *
 292 tgsi_alloc_tokens(unsigned num_tokens)
 293 {
 294    unsigned bytes = num_tokens * sizeof(struct tgsi_token);
 295    return (struct tgsi_token *) MALLOC(bytes);
 296 }
 297
 298
 299 /**
 300  * Free tokens allocated by tgsi_alloc_tokens() or tgsi_dup_tokens()
 301  */
 302 void
 303 tgsi_free_tokens(const struct tgsi_token *tokens)
 304 {
 305    FREE((void *) tokens);
 306 }
 307
 308
 309 void
 310 tgsi_dump_tokens(const struct tgsi_token *tokens)
 311 {
 312    const unsigned *dwords = (const unsigned *)tokens;
 313    int nr = tgsi_num_tokens(tokens);
 314    int i;
 315
 316    STATIC_ASSERT(sizeof(*tokens) == sizeof(unsigned));
 317
 318    debug_printf("const unsigned tokens[%d] = {\n", nr);
 319    for (i = 0; i < nr; i++)
 320       debug_printf("0x%08x,\n", dwords[i]);
 321    debug_printf("};\n");
 322 }
 323
 324 unsigned
 325 tgsi_get_processor_type(const struct tgsi_token *tokens)
 326 {
 327    struct tgsi_parse_context parse;
 328
 329    if (tgsi_parse_init( &parse, tokens ) != TGSI_PARSE_OK) {
 330       debug_printf("tgsi_parse_init() failed in %s:%i!\n", __func__, __LINE__);
 331       return ~0;
 332    }
 333    return parse.FullHeader.Processor.Processor;
 334 }