1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
|
/**************************************************************************
*
* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
* Copyright 2008 VMware, Inc. All rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/**
* TGSI program scan utility.
* Used to determine which registers and instructions are used by a shader.
*
* Authors: Brian Paul
*/
#include "util/u_math.h"
#include "tgsi/tgsi_build.h"
#include "tgsi/tgsi_parse.h"
#include "tgsi/tgsi_scan.h"
/**
* Scan the given TGSI shader to collect information such as number of
* registers used, special instructions used, etc.
* \return info the result of the scan
*/
void
tgsi_scan_shader(const struct tgsi_token *tokens,
struct tgsi_shader_info *info)
{
uint procType, i;
struct tgsi_parse_context parse;
memset(info, 0, sizeof(*info));
for (i = 0; i < TGSI_FILE_COUNT; i++)
info->file_max[i] = -1;
/**
** Setup to begin parsing input shader
**/
if (tgsi_parse_init( &parse, tokens ) != TGSI_PARSE_OK) {
debug_printf("tgsi_parse_init() failed in tgsi_scan_shader()!\n");
return;
}
procType = parse.FullHeader.Processor.Processor;
assert(procType == TGSI_PROCESSOR_FRAGMENT ||
procType == TGSI_PROCESSOR_VERTEX ||
procType == TGSI_PROCESSOR_GEOMETRY);
/**
** Loop over incoming program tokens/instructions
*/
while( !tgsi_parse_end_of_tokens( &parse ) ) {
info->num_tokens++;
tgsi_parse_token( &parse );
switch( parse.FullToken.Token.Type ) {
case TGSI_TOKEN_TYPE_INSTRUCTION:
{
const struct tgsi_full_instruction *fullinst
= &parse.FullToken.FullInstruction;
assert(fullinst->Instruction.Opcode < TGSI_OPCODE_LAST);
info->opcode_count[fullinst->Instruction.Opcode]++;
/* special case: scan fragment shaders for use of the fog
* input/attribute. The X component is fog, the Y component
* is the front/back-face flag.
*/
if (procType == TGSI_PROCESSOR_FRAGMENT) {
uint i;
for (i = 0; i < fullinst->Instruction.NumSrcRegs; i++) {
const struct tgsi_full_src_register *src =
&fullinst->FullSrcRegisters[i];
if (src->SrcRegister.File == TGSI_FILE_INPUT) {
const int ind = src->SrcRegister.Index;
if (info->input_semantic_name[ind] == TGSI_SEMANTIC_FOG) {
if (src->SrcRegister.SwizzleX == TGSI_SWIZZLE_X) {
info->uses_fogcoord = TRUE;
}
else if (src->SrcRegister.SwizzleX == TGSI_SWIZZLE_Y) {
info->uses_frontfacing = TRUE;
}
}
}
}
}
}
break;
case TGSI_TOKEN_TYPE_DECLARATION:
{
const struct tgsi_full_declaration *fulldecl
= &parse.FullToken.FullDeclaration;
const uint file = fulldecl->Declaration.File;
uint reg;
for (reg = fulldecl->DeclarationRange.First;
reg <= fulldecl->DeclarationRange.Last;
reg++) {
/* only first 32 regs will appear in this bitfield */
info->file_mask[file] |= (1 << reg);
info->file_count[file]++;
info->file_max[file] = MAX2(info->file_max[file], (int)reg);
if (file == TGSI_FILE_INPUT) {
info->input_semantic_name[reg] = (ubyte)fulldecl->Semantic.SemanticName;
info->input_semantic_index[reg] = (ubyte)fulldecl->Semantic.SemanticIndex;
info->input_interpolate[reg] = (ubyte)fulldecl->Declaration.Interpolate;
info->num_inputs++;
}
else if (file == TGSI_FILE_OUTPUT) {
info->output_semantic_name[reg] = (ubyte)fulldecl->Semantic.SemanticName;
info->output_semantic_index[reg] = (ubyte)fulldecl->Semantic.SemanticIndex;
info->num_outputs++;
}
/* special case */
if (procType == TGSI_PROCESSOR_FRAGMENT &&
file == TGSI_FILE_OUTPUT &&
fulldecl->Semantic.SemanticName == TGSI_SEMANTIC_POSITION) {
info->writes_z = TRUE;
}
}
}
break;
case TGSI_TOKEN_TYPE_IMMEDIATE:
{
uint reg = info->immediate_count++;
uint file = TGSI_FILE_IMMEDIATE;
info->file_mask[file] |= (1 << reg);
info->file_count[file]++;
info->file_max[file] = MAX2(info->file_max[file], (int)reg);
}
break;
default:
assert( 0 );
}
}
info->uses_kill = (info->opcode_count[TGSI_OPCODE_KIL] ||
info->opcode_count[TGSI_OPCODE_KILP]);
tgsi_parse_free (&parse);
}
/**
* Check if the given shader is a "passthrough" shader consisting of only
* MOV instructions of the form: MOV OUT[n], IN[n]
*
*/
boolean
tgsi_is_passthrough_shader(const struct tgsi_token *tokens)
{
struct tgsi_parse_context parse;
/**
** Setup to begin parsing input shader
**/
if (tgsi_parse_init(&parse, tokens) != TGSI_PARSE_OK) {
debug_printf("tgsi_parse_init() failed in tgsi_is_passthrough_shader()!\n");
return FALSE;
}
/**
** Loop over incoming program tokens/instructions
*/
while (!tgsi_parse_end_of_tokens(&parse)) {
tgsi_parse_token(&parse);
switch (parse.FullToken.Token.Type) {
case TGSI_TOKEN_TYPE_INSTRUCTION:
{
struct tgsi_full_instruction *fullinst =
&parse.FullToken.FullInstruction;
const struct tgsi_full_src_register *src =
&fullinst->FullSrcRegisters[0];
const struct tgsi_full_dst_register *dst =
&fullinst->FullDstRegisters[0];
/* Do a whole bunch of checks for a simple move */
if (fullinst->Instruction.Opcode != TGSI_OPCODE_MOV ||
src->SrcRegister.File != TGSI_FILE_INPUT ||
dst->DstRegister.File != TGSI_FILE_OUTPUT ||
src->SrcRegister.Index != dst->DstRegister.Index ||
src->SrcRegister.Negate ||
src->SrcRegisterExtMod.Negate ||
src->SrcRegisterExtMod.Absolute ||
src->SrcRegisterExtMod.Scale2X ||
src->SrcRegisterExtMod.Bias ||
src->SrcRegisterExtMod.Complement ||
src->SrcRegister.SwizzleX != TGSI_SWIZZLE_X ||
src->SrcRegister.SwizzleY != TGSI_SWIZZLE_Y ||
src->SrcRegister.SwizzleZ != TGSI_SWIZZLE_Z ||
src->SrcRegister.SwizzleW != TGSI_SWIZZLE_W ||
dst->DstRegister.WriteMask != TGSI_WRITEMASK_XYZW)
{
tgsi_parse_free(&parse);
return FALSE;
}
}
break;
case TGSI_TOKEN_TYPE_DECLARATION:
/* fall-through */
case TGSI_TOKEN_TYPE_IMMEDIATE:
/* fall-through */
default:
; /* no-op */
}
}
tgsi_parse_free(&parse);
/* if we get here, it's a pass-through shader */
return TRUE;
}
|
