1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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.
26 **************************************************************************/
28 #include "util/u_debug.h"
29 #include "pipe/p_shader_tokens.h"
30 #include "tgsi_parse.h"
31 #include "util/u_memory.h"
35 struct tgsi_parse_context *ctx,
36 const struct tgsi_token *tokens )
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];
43 return TGSI_PARSE_ERROR;
47 ctx->Position = ctx->FullHeader.Header.HeaderSize;
54 struct tgsi_parse_context *ctx )
59 tgsi_parse_end_of_tokens(
60 struct tgsi_parse_context *ctx )
62 return ctx->Position >=
63 ctx->FullHeader.Header.HeaderSize + ctx->FullHeader.Header.BodySize;
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
73 copy_token(void *dst, const void *src)
80 * Get next 4-byte token, return it at address specified by 'token'
84 struct tgsi_parse_context *ctx,
87 assert( !tgsi_parse_end_of_tokens( ctx ) );
88 copy_token(token, &ctx->Tokens[ctx->Position]);
95 struct tgsi_parse_context *ctx )
97 struct tgsi_token token;
100 next_token( ctx, &token );
102 switch( token.Type ) {
103 case TGSI_TOKEN_TYPE_DECLARATION:
105 struct tgsi_full_declaration *decl = &ctx->FullToken.FullDeclaration;
107 memset(decl, 0, sizeof *decl);
108 copy_token(&decl->Declaration, &token);
110 next_token( ctx, &decl->Range );
112 if (decl->Declaration.Dimension) {
113 next_token(ctx, &decl->Dim);
116 if( decl->Declaration.Semantic ) {
117 next_token( ctx, &decl->Semantic );
120 if (decl->Declaration.File == TGSI_FILE_IMMEDIATE_ARRAY) {
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) {
131 if (decl->Declaration.File == TGSI_FILE_RESOURCE) {
132 next_token(ctx, &decl->Resource);
138 case TGSI_TOKEN_TYPE_IMMEDIATE:
140 struct tgsi_full_immediate *imm = &ctx->FullToken.FullImmediate;
143 memset(imm, 0, sizeof *imm);
144 copy_token(&imm->Immediate, &token);
146 imm_count = imm->Immediate.NrTokens - 1;
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);
155 case TGSI_IMM_UINT32:
156 for (i = 0; i < imm_count; i++) {
157 next_token(ctx, &imm->u[i].Uint);
162 for (i = 0; i < imm_count; i++) {
163 next_token(ctx, &imm->u[i].Int);
174 case TGSI_TOKEN_TYPE_INSTRUCTION:
176 struct tgsi_full_instruction *inst = &ctx->FullToken.FullInstruction;
178 memset(inst, 0, sizeof *inst);
179 copy_token(&inst->Instruction, &token);
181 if (inst->Instruction.Predicate) {
182 next_token(ctx, &inst->Predicate);
185 if (inst->Instruction.Label) {
186 next_token( ctx, &inst->Label);
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] );
196 assert( inst->Instruction.NumDstRegs <= TGSI_FULL_MAX_DST_REGISTERS );
198 for( i = 0; i < inst->Instruction.NumDstRegs; i++ ) {
200 next_token( ctx, &inst->Dst[i].Register );
202 if( inst->Dst[i].Register.Indirect ) {
203 next_token( ctx, &inst->Dst[i].Indirect );
206 * No support for indirect or multi-dimensional addressing.
208 assert( !inst->Dst[i].Indirect.Dimension );
209 assert( !inst->Dst[i].Indirect.Indirect );
211 if( inst->Dst[i].Register.Dimension ) {
212 next_token( ctx, &inst->Dst[i].Dimension );
215 * No support for multi-dimensional addressing.
217 assert( !inst->Dst[i].Dimension.Dimension );
219 if( inst->Dst[i].Dimension.Indirect ) {
220 next_token( ctx, &inst->Dst[i].DimIndirect );
223 * No support for indirect or multi-dimensional addressing.
225 assert( !inst->Dst[i].Indirect.Indirect );
226 assert( !inst->Dst[i].Indirect.Dimension );
231 assert( inst->Instruction.NumSrcRegs <= TGSI_FULL_MAX_SRC_REGISTERS );
233 for( i = 0; i < inst->Instruction.NumSrcRegs; i++ ) {
235 next_token( ctx, &inst->Src[i].Register );
237 if( inst->Src[i].Register.Indirect ) {
238 next_token( ctx, &inst->Src[i].Indirect );
241 * No support for indirect or multi-dimensional addressing.
243 assert( !inst->Src[i].Indirect.Indirect );
244 assert( !inst->Src[i].Indirect.Dimension );
247 if( inst->Src[i].Register.Dimension ) {
248 next_token( ctx, &inst->Src[i].Dimension );
251 * No support for multi-dimensional addressing.
253 assert( !inst->Src[i].Dimension.Dimension );
255 if( inst->Src[i].Dimension.Indirect ) {
256 next_token( ctx, &inst->Src[i].DimIndirect );
259 * No support for indirect or multi-dimensional addressing.
261 assert( !inst->Src[i].Indirect.Indirect );
262 assert( !inst->Src[i].Indirect.Dimension );
270 case TGSI_TOKEN_TYPE_PROPERTY:
272 struct tgsi_full_property *prop = &ctx->FullToken.FullProperty;
275 memset(prop, 0, sizeof *prop);
276 copy_token(&prop->Property, &token);
278 prop_count = prop->Property.NrTokens - 1;
279 for (i = 0; i < prop_count; i++) {
280 next_token(ctx, &prop->u[i]);
295 * Make a new copy of a token array.
298 tgsi_dup_tokens(const struct tgsi_token *tokens)
300 unsigned n = tgsi_num_tokens(tokens);
301 unsigned bytes = n * sizeof(struct tgsi_token);
302 struct tgsi_token *new_tokens = (struct tgsi_token *) MALLOC(bytes);
304 memcpy(new_tokens, tokens, bytes);
310 * Allocate memory for num_tokens tokens.
313 tgsi_alloc_tokens(unsigned num_tokens)
315 unsigned bytes = num_tokens * sizeof(struct tgsi_token);
316 return (struct tgsi_token *) MALLOC(bytes);
321 tgsi_dump_tokens(const struct tgsi_token *tokens)
323 const unsigned *dwords = (const unsigned *)tokens;
324 int nr = tgsi_num_tokens(tokens);
327 assert(sizeof(*tokens) == sizeof(unsigned));
329 debug_printf("const unsigned tokens[%d] = {\n", nr);
330 for (i = 0; i < nr; i++)
331 debug_printf("0x%08x,\n", dwords[i]);
332 debug_printf("};\n");