tgsi_parse.c revision 1279923d72942ee201fcc6ad40d552143f651f03 
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
33unsigned
34tgsi_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
52void
53tgsi_parse_free(
54   struct tgsi_parse_context *ctx )
55{
56}
57
58boolean
59tgsi_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 */
72static INLINE void
73copy_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 */
82static void
83next_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
93void
94tgsi_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_IMMEDIATE_ARRAY) {
125         unsigned i, j;
126         decl->ImmediateData.u = (union tgsi_immediate_data*)
127                                 &ctx->Tokens[ctx->Position];
128         for (i = 0; i <= decl->Range.Last; ++i) {
129            for (j = 0; j < 4; ++j) {
130               ctx->Position++;
131            }
132         }
133      }
134
135      if (decl->Declaration.File == TGSI_FILE_RESOURCE) {
136         next_token(ctx, &decl->Resource);
137      }
138
139      if (decl->Declaration.File == TGSI_FILE_SAMPLER_VIEW) {
140         next_token(ctx, &decl->SamplerView);
141      }
142
143      break;
144   }
145
146   case TGSI_TOKEN_TYPE_IMMEDIATE:
147   {
148      struct tgsi_full_immediate *imm = &ctx->FullToken.FullImmediate;
149      uint imm_count;
150
151      memset(imm, 0, sizeof *imm);
152      copy_token(&imm->Immediate, &token);
153
154      imm_count = imm->Immediate.NrTokens - 1;
155
156      switch (imm->Immediate.DataType) {
157      case TGSI_IMM_FLOAT32:
158         for (i = 0; i < imm_count; i++) {
159            next_token(ctx, &imm->u[i].Float);
160         }
161         break;
162
163      case TGSI_IMM_UINT32:
164         for (i = 0; i < imm_count; i++) {
165            next_token(ctx, &imm->u[i].Uint);
166         }
167         break;
168
169      case TGSI_IMM_INT32:
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.Predicate) {
190         next_token(ctx, &inst->Predicate);
191      }
192
193      if (inst->Instruction.Label) {
194         next_token( ctx, &inst->Label);
195      }
196
197      if (inst->Instruction.Texture) {
198         next_token( ctx, &inst->Texture);
199         for( i = 0; i < inst->Texture.NumOffsets; i++ ) {
200            next_token( ctx, &inst->TexOffsets[i] );
201         }
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            /*
214             * No support for indirect or multi-dimensional addressing.
215             */
216            assert( !inst->Dst[i].Indirect.Dimension );
217            assert( !inst->Dst[i].Indirect.Indirect );
218         }
219         if( inst->Dst[i].Register.Dimension ) {
220            next_token( ctx, &inst->Dst[i].Dimension );
221
222            /*
223             * No support for multi-dimensional addressing.
224             */
225            assert( !inst->Dst[i].Dimension.Dimension );
226
227            if( inst->Dst[i].Dimension.Indirect ) {
228               next_token( ctx, &inst->Dst[i].DimIndirect );
229
230               /*
231                * No support for indirect or multi-dimensional addressing.
232                */
233               assert( !inst->Dst[i].Indirect.Indirect );
234               assert( !inst->Dst[i].Indirect.Dimension );
235            }
236         }
237      }
238
239      assert( inst->Instruction.NumSrcRegs <= TGSI_FULL_MAX_SRC_REGISTERS );
240
241      for( i = 0; i < inst->Instruction.NumSrcRegs; i++ ) {
242
243         next_token( ctx, &inst->Src[i].Register );
244
245         if( inst->Src[i].Register.Indirect ) {
246            next_token( ctx, &inst->Src[i].Indirect );
247
248            /*
249             * No support for indirect or multi-dimensional addressing.
250             */
251            assert( !inst->Src[i].Indirect.Indirect );
252            assert( !inst->Src[i].Indirect.Dimension );
253         }
254
255         if( inst->Src[i].Register.Dimension ) {
256            next_token( ctx, &inst->Src[i].Dimension );
257
258            /*
259             * No support for multi-dimensional addressing.
260             */
261            assert( !inst->Src[i].Dimension.Dimension );
262
263            if( inst->Src[i].Dimension.Indirect ) {
264               next_token( ctx, &inst->Src[i].DimIndirect );
265
266               /*
267               * No support for indirect or multi-dimensional addressing.
268               */
269               assert( !inst->Src[i].Indirect.Indirect );
270               assert( !inst->Src[i].Indirect.Dimension );
271            }
272         }
273      }
274
275      break;
276   }
277
278   case TGSI_TOKEN_TYPE_PROPERTY:
279   {
280      struct tgsi_full_property *prop = &ctx->FullToken.FullProperty;
281      uint prop_count;
282
283      memset(prop, 0, sizeof *prop);
284      copy_token(&prop->Property, &token);
285
286      prop_count = prop->Property.NrTokens - 1;
287      for (i = 0; i < prop_count; i++) {
288         next_token(ctx, &prop->u[i]);
289      }
290
291      break;
292   }
293
294   default:
295      assert( 0 );
296   }
297}
298
299
300
301
302/**
303 * Make a new copy of a token array.
304 */
305struct tgsi_token *
306tgsi_dup_tokens(const struct tgsi_token *tokens)
307{
308   unsigned n = tgsi_num_tokens(tokens);
309   unsigned bytes = n * sizeof(struct tgsi_token);
310   struct tgsi_token *new_tokens = (struct tgsi_token *) MALLOC(bytes);
311   if (new_tokens)
312      memcpy(new_tokens, tokens, bytes);
313   return new_tokens;
314}
315
316
317/**
318 * Allocate memory for num_tokens tokens.
319 */
320struct tgsi_token *
321tgsi_alloc_tokens(unsigned num_tokens)
322{
323   unsigned bytes = num_tokens * sizeof(struct tgsi_token);
324   return (struct tgsi_token *) MALLOC(bytes);
325}
326
327
328void
329tgsi_dump_tokens(const struct tgsi_token *tokens)
330{
331   const unsigned *dwords = (const unsigned *)tokens;
332   int nr = tgsi_num_tokens(tokens);
333   int i;
334
335   assert(sizeof(*tokens) == sizeof(unsigned));
336
337   debug_printf("const unsigned tokens[%d] = {\n", nr);
338   for (i = 0; i < nr; i++)
339      debug_printf("0x%08x,\n", dwords[i]);
340   debug_printf("};\n");
341}
342