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
tgsi_parse_init(struct tgsi_parse_context * ctx,const struct tgsi_token * tokens)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
tgsi_parse_free(struct tgsi_parse_context * ctx)53 tgsi_parse_free(
54 struct tgsi_parse_context *ctx )
55 {
56 }
57
58 boolean
tgsi_parse_end_of_tokens(struct tgsi_parse_context * ctx)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
copy_token(void * dst,const void * src)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
next_token(struct tgsi_parse_context * ctx,void * token)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
tgsi_parse_token(struct tgsi_parse_context * ctx)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 case TGSI_IMM_UINT64:
159 for (i = 0; i < imm_count; i++) {
160 next_token(ctx, &imm->u[i].Uint);
161 }
162 break;
163
164 case TGSI_IMM_INT32:
165 case TGSI_IMM_INT64:
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.Label) {
186 next_token( ctx, &inst->Label);
187 }
188
189 if (inst->Instruction.Texture) {
190 next_token( ctx, &inst->Texture);
191 for (i = 0; i < inst->Texture.NumOffsets; i++) {
192 next_token( ctx, &inst->TexOffsets[i] );
193 }
194 }
195
196 if (inst->Instruction.Memory) {
197 next_token(ctx, &inst->Memory);
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 if (inst->Dst[i].Register.Dimension) {
210 next_token( ctx, &inst->Dst[i].Dimension );
211
212 /*
213 * No support for multi-dimensional addressing.
214 */
215 assert( !inst->Dst[i].Dimension.Dimension );
216
217 if (inst->Dst[i].Dimension.Indirect)
218 next_token( ctx, &inst->Dst[i].DimIndirect );
219 }
220 }
221
222 assert( inst->Instruction.NumSrcRegs <= TGSI_FULL_MAX_SRC_REGISTERS );
223
224 for (i = 0; i < inst->Instruction.NumSrcRegs; i++) {
225
226 next_token( ctx, &inst->Src[i].Register );
227
228 if (inst->Src[i].Register.Indirect)
229 next_token( ctx, &inst->Src[i].Indirect );
230
231 if (inst->Src[i].Register.Dimension) {
232 next_token( ctx, &inst->Src[i].Dimension );
233
234 /*
235 * No support for multi-dimensional addressing.
236 */
237 assert( !inst->Src[i].Dimension.Dimension );
238
239 if (inst->Src[i].Dimension.Indirect)
240 next_token( ctx, &inst->Src[i].DimIndirect );
241 }
242 }
243
244 break;
245 }
246
247 case TGSI_TOKEN_TYPE_PROPERTY:
248 {
249 struct tgsi_full_property *prop = &ctx->FullToken.FullProperty;
250 uint prop_count;
251
252 memset(prop, 0, sizeof *prop);
253 copy_token(&prop->Property, &token);
254
255 prop_count = prop->Property.NrTokens - 1;
256 for (i = 0; i < prop_count; i++) {
257 next_token(ctx, &prop->u[i]);
258 }
259
260 break;
261 }
262
263 default:
264 assert( 0 );
265 }
266 }
267
268
269
270
271 /**
272 * Make a new copy of a token array.
273 */
274 struct tgsi_token *
tgsi_dup_tokens(const struct tgsi_token * tokens)275 tgsi_dup_tokens(const struct tgsi_token *tokens)
276 {
277 unsigned n = tgsi_num_tokens(tokens);
278 unsigned bytes = n * sizeof(struct tgsi_token);
279 struct tgsi_token *new_tokens = (struct tgsi_token *) MALLOC(bytes);
280 if (new_tokens)
281 memcpy(new_tokens, tokens, bytes);
282 return new_tokens;
283 }
284
285
286 /**
287 * Allocate memory for num_tokens tokens.
288 */
289 struct tgsi_token *
tgsi_alloc_tokens(unsigned num_tokens)290 tgsi_alloc_tokens(unsigned num_tokens)
291 {
292 unsigned bytes = num_tokens * sizeof(struct tgsi_token);
293 return (struct tgsi_token *) MALLOC(bytes);
294 }
295
296
297 /**
298 * Free tokens allocated by tgsi_alloc_tokens() or tgsi_dup_tokens()
299 */
300 void
tgsi_free_tokens(const struct tgsi_token * tokens)301 tgsi_free_tokens(const struct tgsi_token *tokens)
302 {
303 FREE((void *) tokens);
304 }
305
306
307 void
tgsi_dump_tokens(const struct tgsi_token * tokens)308 tgsi_dump_tokens(const struct tgsi_token *tokens)
309 {
310 const unsigned *dwords = (const unsigned *)tokens;
311 int nr = tgsi_num_tokens(tokens);
312 int i;
313
314 STATIC_ASSERT(sizeof(*tokens) == sizeof(unsigned));
315
316 debug_printf("const unsigned tokens[%d] = {\n", nr);
317 for (i = 0; i < nr; i++)
318 debug_printf("0x%08x,\n", dwords[i]);
319 debug_printf("};\n");
320 }
321
322 unsigned
tgsi_get_processor_type(const struct tgsi_token * tokens)323 tgsi_get_processor_type(const struct tgsi_token *tokens)
324 {
325 struct tgsi_parse_context parse;
326
327 if (tgsi_parse_init( &parse, tokens ) != TGSI_PARSE_OK) {
328 debug_printf("tgsi_parse_init() failed in %s:%i!\n", __func__, __LINE__);
329 return ~0;
330 }
331 return parse.FullHeader.Processor.Processor;
332 }
333