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