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 "tgsi_build.h"
32 #include "util/u_memory.h"
36 union tgsi_full_token
*full_token
)
38 full_token
->Token
.Type
= TGSI_TOKEN_TYPE_DECLARATION
;
43 union tgsi_full_token
*full_token
)
45 if( full_token
->Token
.Type
== TGSI_TOKEN_TYPE_IMMEDIATE
) {
46 FREE( (void *) full_token
->FullImmediate
.u
.Pointer
);
52 struct tgsi_parse_context
*ctx
,
53 const struct tgsi_token
*tokens
)
55 ctx
->FullVersion
.Version
= *(struct tgsi_version
*) &tokens
[0];
56 if( ctx
->FullVersion
.Version
.MajorVersion
> 1 ) {
57 return TGSI_PARSE_ERROR
;
60 ctx
->FullHeader
.Header
= *(struct tgsi_header
*) &tokens
[1];
61 if( ctx
->FullHeader
.Header
.HeaderSize
>= 2 ) {
62 ctx
->FullHeader
.Processor
= *(struct tgsi_processor
*) &tokens
[2];
65 ctx
->FullHeader
.Processor
= tgsi_default_processor();
69 ctx
->Position
= 1 + ctx
->FullHeader
.Header
.HeaderSize
;
71 tgsi_full_token_init( &ctx
->FullToken
);
78 struct tgsi_parse_context
*ctx
)
80 tgsi_full_token_free( &ctx
->FullToken
);
84 tgsi_parse_end_of_tokens(
85 struct tgsi_parse_context
*ctx
)
87 return ctx
->Position
>=
88 1 + ctx
->FullHeader
.Header
.HeaderSize
+ ctx
->FullHeader
.Header
.BodySize
;
93 * This function is used to avoid and work-around type punning/aliasing
94 * warnings. The warnings seem harmless on x86 but on PPC they cause
98 copy_token(void *dst
, const void *src
)
105 * Get next 4-byte token, return it at address specified by 'token'
109 struct tgsi_parse_context
*ctx
,
112 assert( !tgsi_parse_end_of_tokens( ctx
) );
113 copy_token(token
, &ctx
->Tokens
[ctx
->Position
]);
120 struct tgsi_parse_context
*ctx
)
122 struct tgsi_token token
;
125 tgsi_full_token_free( &ctx
->FullToken
);
126 tgsi_full_token_init( &ctx
->FullToken
);
128 next_token( ctx
, &token
);
130 switch( token
.Type
) {
131 case TGSI_TOKEN_TYPE_DECLARATION
:
133 struct tgsi_full_declaration
*decl
= &ctx
->FullToken
.FullDeclaration
;
135 *decl
= tgsi_default_full_declaration();
136 copy_token(&decl
->Declaration
, &token
);
138 next_token( ctx
, &decl
->DeclarationRange
);
140 if( decl
->Declaration
.Semantic
) {
141 next_token( ctx
, &decl
->Semantic
);
147 case TGSI_TOKEN_TYPE_IMMEDIATE
:
149 struct tgsi_full_immediate
*imm
= &ctx
->FullToken
.FullImmediate
;
151 *imm
= tgsi_default_full_immediate();
152 copy_token(&imm
->Immediate
, &token
);
153 assert( !imm
->Immediate
.Extended
);
155 switch (imm
->Immediate
.DataType
) {
156 case TGSI_IMM_FLOAT32
:
158 uint imm_count
= imm
->Immediate
.NrTokens
- 1;
159 struct tgsi_immediate_float32
*data
;
161 data
= (struct tgsi_immediate_float32
*) MALLOC(sizeof(struct tgsi_immediate_float32
) * imm_count
);
163 for (i
= 0; i
< imm_count
; i
++) {
164 next_token(ctx
, &data
[i
]);
166 imm
->u
.ImmediateFloat32
= data
;
178 case TGSI_TOKEN_TYPE_INSTRUCTION
:
180 struct tgsi_full_instruction
*inst
= &ctx
->FullToken
.FullInstruction
;
183 *inst
= tgsi_default_full_instruction();
184 copy_token(&inst
->Instruction
, &token
);
185 extended
= inst
->Instruction
.Extended
;
188 struct tgsi_src_register_ext token
;
190 next_token( ctx
, &token
);
192 switch( token
.Type
) {
193 case TGSI_INSTRUCTION_EXT_TYPE_NV
:
194 copy_token(&inst
->InstructionExtNv
, &token
);
197 case TGSI_INSTRUCTION_EXT_TYPE_LABEL
:
198 copy_token(&inst
->InstructionExtLabel
, &token
);
201 case TGSI_INSTRUCTION_EXT_TYPE_TEXTURE
:
202 copy_token(&inst
->InstructionExtTexture
, &token
);
209 extended
= token
.Extended
;
212 assert( inst
->Instruction
.NumDstRegs
<= TGSI_FULL_MAX_DST_REGISTERS
);
214 for( i
= 0; i
< inst
->Instruction
.NumDstRegs
; i
++ ) {
217 next_token( ctx
, &inst
->FullDstRegisters
[i
].DstRegister
);
220 * No support for indirect or multi-dimensional addressing.
222 assert( !inst
->FullDstRegisters
[i
].DstRegister
.Indirect
);
223 assert( !inst
->FullDstRegisters
[i
].DstRegister
.Dimension
);
225 extended
= inst
->FullDstRegisters
[i
].DstRegister
.Extended
;
228 struct tgsi_src_register_ext token
;
230 next_token( ctx
, &token
);
232 switch( token
.Type
) {
233 case TGSI_DST_REGISTER_EXT_TYPE_CONDCODE
:
234 copy_token(&inst
->FullDstRegisters
[i
].DstRegisterExtConcode
,
238 case TGSI_DST_REGISTER_EXT_TYPE_MODULATE
:
239 copy_token(&inst
->FullDstRegisters
[i
].DstRegisterExtModulate
,
247 extended
= token
.Extended
;
251 assert( inst
->Instruction
.NumSrcRegs
<= TGSI_FULL_MAX_SRC_REGISTERS
);
253 for( i
= 0; i
< inst
->Instruction
.NumSrcRegs
; i
++ ) {
256 next_token( ctx
, &inst
->FullSrcRegisters
[i
].SrcRegister
);
258 extended
= inst
->FullSrcRegisters
[i
].SrcRegister
.Extended
;
261 struct tgsi_src_register_ext token
;
263 next_token( ctx
, &token
);
265 switch( token
.Type
) {
266 case TGSI_SRC_REGISTER_EXT_TYPE_SWZ
:
267 copy_token(&inst
->FullSrcRegisters
[i
].SrcRegisterExtSwz
,
271 case TGSI_SRC_REGISTER_EXT_TYPE_MOD
:
272 copy_token(&inst
->FullSrcRegisters
[i
].SrcRegisterExtMod
,
280 extended
= token
.Extended
;
283 if( inst
->FullSrcRegisters
[i
].SrcRegister
.Indirect
) {
284 next_token( ctx
, &inst
->FullSrcRegisters
[i
].SrcRegisterInd
);
287 * No support for indirect or multi-dimensional addressing.
289 assert( !inst
->FullSrcRegisters
[i
].SrcRegisterInd
.Indirect
);
290 assert( !inst
->FullSrcRegisters
[i
].SrcRegisterInd
.Dimension
);
291 assert( !inst
->FullSrcRegisters
[i
].SrcRegisterInd
.Extended
);
294 if( inst
->FullSrcRegisters
[i
].SrcRegister
.Dimension
) {
295 next_token( ctx
, &inst
->FullSrcRegisters
[i
].SrcRegisterDim
);
298 * No support for multi-dimensional addressing.
300 assert( !inst
->FullSrcRegisters
[i
].SrcRegisterDim
.Dimension
);
301 assert( !inst
->FullSrcRegisters
[i
].SrcRegisterDim
.Extended
);
303 if( inst
->FullSrcRegisters
[i
].SrcRegisterDim
.Indirect
) {
304 next_token( ctx
, &inst
->FullSrcRegisters
[i
].SrcRegisterDimInd
);
307 * No support for indirect or multi-dimensional addressing.
309 assert( !inst
->FullSrcRegisters
[i
].SrcRegisterInd
.Indirect
);
310 assert( !inst
->FullSrcRegisters
[i
].SrcRegisterInd
.Dimension
);
311 assert( !inst
->FullSrcRegisters
[i
].SrcRegisterInd
.Extended
);
326 tgsi_num_tokens(const struct tgsi_token
*tokens
)
328 struct tgsi_parse_context ctx
;
329 if (tgsi_parse_init(&ctx
, tokens
) == TGSI_PARSE_OK
) {
330 unsigned len
= (ctx
.FullHeader
.Header
.HeaderSize
+
331 ctx
.FullHeader
.Header
.BodySize
+
340 * Make a new copy of a token array.
343 tgsi_dup_tokens(const struct tgsi_token
*tokens
)
345 unsigned n
= tgsi_num_tokens(tokens
);
346 unsigned bytes
= n
* sizeof(struct tgsi_token
);
347 struct tgsi_token
*new_tokens
= (struct tgsi_token
*) MALLOC(bytes
);
349 memcpy(new_tokens
, tokens
, bytes
);