tgsi_parse.c revision a5f44cc8c2ce0916809ce5da5a2490ad000ef099 
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.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 */
301struct tgsi_token *
302tgsi_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 */
316struct tgsi_token *
317tgsi_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
324void
325tgsi_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}
338