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
.Semantic
) {
113 next_token( ctx
, &decl
->Semantic
);
119 case TGSI_TOKEN_TYPE_IMMEDIATE
:
121 struct tgsi_full_immediate
*imm
= &ctx
->FullToken
.FullImmediate
;
123 memset(imm
, 0, sizeof *imm
);
124 copy_token(&imm
->Immediate
, &token
);
126 switch (imm
->Immediate
.DataType
) {
127 case TGSI_IMM_FLOAT32
:
129 uint imm_count
= imm
->Immediate
.NrTokens
- 1;
130 for (i
= 0; i
< imm_count
; i
++) {
131 next_token(ctx
, &imm
->u
[i
]);
143 case TGSI_TOKEN_TYPE_INSTRUCTION
:
145 struct tgsi_full_instruction
*inst
= &ctx
->FullToken
.FullInstruction
;
147 memset(inst
, 0, sizeof *inst
);
148 copy_token(&inst
->Instruction
, &token
);
150 if (inst
->Instruction
.Predicate
) {
151 next_token(ctx
, &inst
->Predicate
);
154 if (inst
->Instruction
.Label
) {
155 next_token( ctx
, &inst
->Label
);
158 if (inst
->Instruction
.Texture
) {
159 next_token( ctx
, &inst
->Texture
);
162 assert( inst
->Instruction
.NumDstRegs
<= TGSI_FULL_MAX_DST_REGISTERS
);
164 for( i
= 0; i
< inst
->Instruction
.NumDstRegs
; i
++ ) {
166 next_token( ctx
, &inst
->Dst
[i
].Register
);
169 * No support for indirect or multi-dimensional addressing.
171 assert( !inst
->Dst
[i
].Register
.Dimension
);
173 if( inst
->Dst
[i
].Register
.Indirect
) {
174 next_token( ctx
, &inst
->Dst
[i
].Indirect
);
177 * No support for indirect or multi-dimensional addressing.
179 assert( !inst
->Dst
[i
].Indirect
.Dimension
);
180 assert( !inst
->Dst
[i
].Indirect
.Indirect
);
184 assert( inst
->Instruction
.NumSrcRegs
<= TGSI_FULL_MAX_SRC_REGISTERS
);
186 for( i
= 0; i
< inst
->Instruction
.NumSrcRegs
; i
++ ) {
188 next_token( ctx
, &inst
->Src
[i
].Register
);
190 if( inst
->Src
[i
].Register
.Indirect
) {
191 next_token( ctx
, &inst
->Src
[i
].Indirect
);
194 * No support for indirect or multi-dimensional addressing.
196 assert( !inst
->Src
[i
].Indirect
.Indirect
);
197 assert( !inst
->Src
[i
].Indirect
.Dimension
);
200 if( inst
->Src
[i
].Register
.Dimension
) {
201 next_token( ctx
, &inst
->Src
[i
].Dimension
);
204 * No support for multi-dimensional addressing.
206 assert( !inst
->Src
[i
].Dimension
.Dimension
);
208 if( inst
->Src
[i
].Dimension
.Indirect
) {
209 next_token( ctx
, &inst
->Src
[i
].DimIndirect
);
212 * No support for indirect or multi-dimensional addressing.
214 assert( !inst
->Src
[i
].Indirect
.Indirect
);
215 assert( !inst
->Src
[i
].Indirect
.Dimension
);
223 case TGSI_TOKEN_TYPE_PROPERTY
:
225 struct tgsi_full_property
*prop
= &ctx
->FullToken
.FullProperty
;
228 memset(prop
, 0, sizeof *prop
);
229 copy_token(&prop
->Property
, &token
);
231 prop_count
= prop
->Property
.NrTokens
- 1;
232 for (i
= 0; i
< prop_count
; i
++) {
233 next_token(ctx
, &prop
->u
[i
]);
246 tgsi_num_tokens(const struct tgsi_token
*tokens
)
248 struct tgsi_parse_context ctx
;
249 if (tgsi_parse_init(&ctx
, tokens
) == TGSI_PARSE_OK
) {
250 unsigned len
= (ctx
.FullHeader
.Header
.HeaderSize
+
251 ctx
.FullHeader
.Header
.BodySize
);
259 * Make a new copy of a token array.
262 tgsi_dup_tokens(const struct tgsi_token
*tokens
)
264 unsigned n
= tgsi_num_tokens(tokens
);
265 unsigned bytes
= n
* sizeof(struct tgsi_token
);
266 struct tgsi_token
*new_tokens
= (struct tgsi_token
*) MALLOC(bytes
);
268 memcpy(new_tokens
, tokens
, bytes
);