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
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
|
/**************************************************************************
*
* Copyright 2011 The Chromium OS authors.
* 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 GOOGLE 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.
*
**************************************************************************/
#include "i915_reg.h"
#include "i915_context.h"
#include "i915_fpc.h"
#include "pipe/p_shader_tokens.h"
#include "util/u_math.h"
#include "util/u_memory.h"
#include "util/u_string.h"
#include "tgsi/tgsi_parse.h"
#include "tgsi/tgsi_dump.h"
static boolean same_src_dst_reg(struct i915_full_src_register* s1, struct i915_full_dst_register* d1)
{
return (s1->Register.File == d1->Register.File &&
s1->Register.Indirect == d1->Register.Indirect &&
s1->Register.Dimension == d1->Register.Dimension &&
s1->Register.Index == d1->Register.Index);
}
static boolean same_dst_reg(struct i915_full_dst_register* d1, struct i915_full_dst_register* d2)
{
return (d1->Register.File == d2->Register.File &&
d1->Register.Indirect == d2->Register.Indirect &&
d1->Register.Dimension == d2->Register.Dimension &&
d1->Register.Index == d2->Register.Index);
}
static boolean same_src_reg(struct i915_full_src_register* d1, struct i915_full_src_register* d2)
{
return (d1->Register.File == d2->Register.File &&
d1->Register.Indirect == d2->Register.Indirect &&
d1->Register.Dimension == d2->Register.Dimension &&
d1->Register.Index == d2->Register.Index &&
d1->Register.Absolute == d2->Register.Absolute &&
d1->Register.Negate == d2->Register.Negate);
}
static boolean has_destination(unsigned opcode)
{
return (opcode != TGSI_OPCODE_NOP &&
opcode != TGSI_OPCODE_KIL &&
opcode != TGSI_OPCODE_RET);
}
static boolean is_unswizzled(struct i915_full_src_register* r,
unsigned write_mask)
{
if ( write_mask & TGSI_WRITEMASK_X && r->Register.SwizzleX != TGSI_SWIZZLE_X)
return FALSE;
if ( write_mask & TGSI_WRITEMASK_Y && r->Register.SwizzleY != TGSI_SWIZZLE_Y)
return FALSE;
if ( write_mask & TGSI_WRITEMASK_Z && r->Register.SwizzleZ != TGSI_SWIZZLE_Z)
return FALSE;
if ( write_mask & TGSI_WRITEMASK_W && r->Register.SwizzleW != TGSI_SWIZZLE_W)
return FALSE;
return TRUE;
}
static boolean op_commutes(unsigned opcode)
{
if (opcode == TGSI_OPCODE_ADD) return TRUE;
if (opcode == TGSI_OPCODE_MUL) return TRUE;
return FALSE;
}
static unsigned op_neutral_element(unsigned opcode)
{
if (opcode == TGSI_OPCODE_ADD)
return TGSI_SWIZZLE_ZERO;
if (opcode == TGSI_OPCODE_MUL)
return TGSI_SWIZZLE_ONE;
debug_printf("Unknown opcode %d\n",opcode);
return TGSI_SWIZZLE_ZERO;
}
/*
* Sets the swizzle to the neutral element for the operation for the bits
* of writemask which are set, swizzle to identity otherwise.
*/
static void set_neutral_element_swizzle(struct i915_full_src_register* r,
unsigned write_mask,
unsigned neutral)
{
if ( write_mask & TGSI_WRITEMASK_X )
r->Register.SwizzleX = neutral;
else
r->Register.SwizzleX = TGSI_SWIZZLE_X;
if ( write_mask & TGSI_WRITEMASK_Y )
r->Register.SwizzleY = neutral;
else
r->Register.SwizzleY = TGSI_SWIZZLE_Y;
if ( write_mask & TGSI_WRITEMASK_Z )
r->Register.SwizzleZ = neutral;
else
r->Register.SwizzleZ = TGSI_SWIZZLE_Z;
if ( write_mask & TGSI_WRITEMASK_W )
r->Register.SwizzleW = neutral;
else
r->Register.SwizzleW = TGSI_SWIZZLE_W;
}
/*
* Optimize away things like:
* MUL OUT[0].xyz, TEMP[1], TEMP[2]
* MOV OUT[0].w, TEMP[2]
* into:
* MUL OUT[0].xyzw, TEMP[1].xyz1, TEMP[2]
* This is useful for optimizing texenv.
*/
static void i915_fpc_optimize_mov_after_alu(union i915_full_token* current, union i915_full_token* next)
{
if ( current->Token.Type == TGSI_TOKEN_TYPE_INSTRUCTION &&
next->Token.Type == TGSI_TOKEN_TYPE_INSTRUCTION &&
op_commutes(current->FullInstruction.Instruction.Opcode) &&
current->FullInstruction.Instruction.Saturate == next->FullInstruction.Instruction.Saturate &&
next->FullInstruction.Instruction.Opcode == TGSI_OPCODE_MOV &&
same_dst_reg(&next->FullInstruction.Dst[0], ¤t->FullInstruction.Dst[0]) &&
same_src_reg(&next->FullInstruction.Src[0], ¤t->FullInstruction.Src[1]) &&
is_unswizzled(¤t->FullInstruction.Src[0], current->FullInstruction.Dst[0].Register.WriteMask) &&
is_unswizzled(¤t->FullInstruction.Src[1], current->FullInstruction.Dst[0].Register.WriteMask) &&
is_unswizzled(&next->FullInstruction.Src[0], next->FullInstruction.Dst[0].Register.WriteMask) )
{
next->FullInstruction.Instruction.Opcode = TGSI_OPCODE_NOP;
set_neutral_element_swizzle(¤t->FullInstruction.Src[1], 0, 0);
set_neutral_element_swizzle(¤t->FullInstruction.Src[0],
next->FullInstruction.Dst[0].Register.WriteMask,
op_neutral_element(current->FullInstruction.Instruction.Opcode));
current->FullInstruction.Dst[0].Register.WriteMask = current->FullInstruction.Dst[0].Register.WriteMask |
next->FullInstruction.Dst[0].Register.WriteMask;
return;
}
if ( current->Token.Type == TGSI_TOKEN_TYPE_INSTRUCTION &&
next->Token.Type == TGSI_TOKEN_TYPE_INSTRUCTION &&
op_commutes(current->FullInstruction.Instruction.Opcode) &&
current->FullInstruction.Instruction.Saturate == next->FullInstruction.Instruction.Saturate &&
next->FullInstruction.Instruction.Opcode == TGSI_OPCODE_MOV &&
same_dst_reg(&next->FullInstruction.Dst[0], ¤t->FullInstruction.Dst[0]) &&
same_src_reg(&next->FullInstruction.Src[0], ¤t->FullInstruction.Src[0]) &&
is_unswizzled(¤t->FullInstruction.Src[0], current->FullInstruction.Dst[0].Register.WriteMask) &&
is_unswizzled(¤t->FullInstruction.Src[1], current->FullInstruction.Dst[0].Register.WriteMask) &&
is_unswizzled(&next->FullInstruction.Src[0], next->FullInstruction.Dst[0].Register.WriteMask) )
{
next->FullInstruction.Instruction.Opcode = TGSI_OPCODE_NOP;
set_neutral_element_swizzle(¤t->FullInstruction.Src[0], 0, 0);
set_neutral_element_swizzle(¤t->FullInstruction.Src[1],
next->FullInstruction.Dst[0].Register.WriteMask,
op_neutral_element(current->FullInstruction.Instruction.Opcode));
current->FullInstruction.Dst[0].Register.WriteMask = current->FullInstruction.Dst[0].Register.WriteMask |
next->FullInstruction.Dst[0].Register.WriteMask;
return;
}
}
/*
* Optimize away things like:
* *** TEMP[0], TEMP[1], TEMP[2]
* MOV OUT[0] TEMP[0]
* into:
* *** OUT[0], TEMP[1], TEMP[2]
*/
static void i915_fpc_optimize_useless_mov(union i915_full_token* current, union i915_full_token* next)
{
if ( current->Token.Type == TGSI_TOKEN_TYPE_INSTRUCTION &&
next->Token.Type == TGSI_TOKEN_TYPE_INSTRUCTION &&
next->FullInstruction.Instruction.Opcode == TGSI_OPCODE_MOV &&
has_destination(current->FullInstruction.Instruction.Opcode) &&
next->FullInstruction.Instruction.Saturate == TGSI_SAT_NONE &&
next->FullInstruction.Src[0].Register.Absolute == 0 &&
next->FullInstruction.Src[0].Register.Negate == 0 &&
is_unswizzled(&next->FullInstruction.Src[0], next->FullInstruction.Dst[0].Register.WriteMask) &&
current->FullInstruction.Dst[0].Register.WriteMask == next->FullInstruction.Dst[0].Register.WriteMask &&
same_src_dst_reg(&next->FullInstruction.Src[0], ¤t->FullInstruction.Dst[0]) )
{
next->FullInstruction.Instruction.Opcode = TGSI_OPCODE_NOP;
current->FullInstruction.Dst[0] = next->FullInstruction.Dst[0];
return;
}
}
static void copy_src_reg(struct i915_src_register* o, const struct tgsi_src_register* i)
{
o->File = i->File;
o->Indirect = i->Indirect;
o->Dimension = i->Dimension;
o->Index = i->Index;
o->SwizzleX = i->SwizzleX;
o->SwizzleY = i->SwizzleY;
o->SwizzleZ = i->SwizzleZ;
o->SwizzleW = i->SwizzleW;
o->Absolute = i->Absolute;
o->Negate = i->Negate;
}
static void copy_dst_reg(struct i915_dst_register* o, const struct tgsi_dst_register* i)
{
o->File = i->File;
o->WriteMask = i->WriteMask;
o->Indirect = i->Indirect;
o->Dimension = i->Dimension;
o->Index = i->Index;
}
static void copy_instruction(struct i915_full_instruction* o, const struct tgsi_full_instruction* i)
{
memcpy(&o->Instruction, &i->Instruction, sizeof(o->Instruction));
memcpy(&o->Texture, &i->Texture, sizeof(o->Texture));
copy_dst_reg(&o->Dst[0].Register, &i->Dst[0].Register);
copy_src_reg(&o->Src[0].Register, &i->Src[0].Register);
copy_src_reg(&o->Src[1].Register, &i->Src[1].Register);
copy_src_reg(&o->Src[2].Register, &i->Src[2].Register);
}
static void copy_token(union i915_full_token* o, union tgsi_full_token* i)
{
if (i->Token.Type != TGSI_TOKEN_TYPE_INSTRUCTION)
memcpy(o, i, sizeof(*o));
else
copy_instruction(&o->FullInstruction, &i->FullInstruction);
}
struct i915_token_list* i915_optimize(const struct tgsi_token *tokens)
{
struct i915_token_list *out_tokens = MALLOC(sizeof(struct i915_token_list));
struct tgsi_parse_context parse;
int i = 0;
out_tokens->NumTokens = 0;
/* Count the tokens */
tgsi_parse_init( &parse, tokens );
while( !tgsi_parse_end_of_tokens( &parse ) ) {
tgsi_parse_token( &parse );
out_tokens->NumTokens++;
}
tgsi_parse_free (&parse);
/* Allocate our tokens */
out_tokens->Tokens = MALLOC(sizeof(union i915_full_token) * out_tokens->NumTokens);
tgsi_parse_init( &parse, tokens );
while( !tgsi_parse_end_of_tokens( &parse ) ) {
tgsi_parse_token( &parse );
copy_token(&out_tokens->Tokens[i] , &parse.FullToken);
if (i > 0) {
i915_fpc_optimize_useless_mov(&out_tokens->Tokens[i-1], &out_tokens->Tokens[i]);
i915_fpc_optimize_mov_after_alu(&out_tokens->Tokens[i-1], &out_tokens->Tokens[i]);
}
i++;
}
tgsi_parse_free (&parse);
return out_tokens;
}
void i915_optimize_free(struct i915_token_list* tokens)
{
free(tokens->Tokens);
free(tokens);
}
|