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
|
#include "pipe/p_util.h"
#include "pipe/p_shader_tokens.h"
#include "tgsi/tgsi_parse.h"
//#include "tgsi_build.h"
#include "tgsi/tgsi_util.h"
unsigned
tgsi_util_get_src_register_swizzle(
const struct tgsi_src_register *reg,
unsigned component )
{
switch( component ) {
case 0:
return reg->SwizzleX;
case 1:
return reg->SwizzleY;
case 2:
return reg->SwizzleZ;
case 3:
return reg->SwizzleW;
default:
assert( 0 );
}
return 0;
}
unsigned
tgsi_util_get_src_register_extswizzle(
const struct tgsi_src_register_ext_swz *reg,
unsigned component )
{
switch( component ) {
case 0:
return reg->ExtSwizzleX;
case 1:
return reg->ExtSwizzleY;
case 2:
return reg->ExtSwizzleZ;
case 3:
return reg->ExtSwizzleW;
default:
assert( 0 );
}
return 0;
}
unsigned
tgsi_util_get_full_src_register_extswizzle(
const struct tgsi_full_src_register *reg,
unsigned component )
{
unsigned swizzle;
/*
* First, calculate the extended swizzle for a given channel. This will give
* us either a channel index into the simple swizzle or a constant 1 or 0.
*/
swizzle = tgsi_util_get_src_register_extswizzle(
®->SrcRegisterExtSwz,
component );
assert (TGSI_SWIZZLE_X == TGSI_EXTSWIZZLE_X);
assert (TGSI_SWIZZLE_Y == TGSI_EXTSWIZZLE_Y);
assert (TGSI_SWIZZLE_Z == TGSI_EXTSWIZZLE_Z);
assert (TGSI_SWIZZLE_W == TGSI_EXTSWIZZLE_W);
assert (TGSI_EXTSWIZZLE_ZERO > TGSI_SWIZZLE_W);
assert (TGSI_EXTSWIZZLE_ONE > TGSI_SWIZZLE_W);
/*
* Second, calculate the simple swizzle for the unswizzled channel index.
* Leave the constants intact, they are not affected by the simple swizzle.
*/
if( swizzle <= TGSI_SWIZZLE_W ) {
swizzle = tgsi_util_get_src_register_swizzle(
®->SrcRegister,
component );
}
return swizzle;
}
unsigned
tgsi_util_get_src_register_extnegate(
const struct tgsi_src_register_ext_swz *reg,
unsigned component )
{
switch( component ) {
case 0:
return reg->NegateX;
case 1:
return reg->NegateY;
case 2:
return reg->NegateZ;
case 3:
return reg->NegateW;
default:
assert( 0 );
}
return 0;
}
void
tgsi_util_set_src_register_extnegate(
struct tgsi_src_register_ext_swz *reg,
unsigned negate,
unsigned component )
{
switch( component ) {
case 0:
reg->NegateX = negate;
break;
case 1:
reg->NegateY = negate;
break;
case 2:
reg->NegateZ = negate;
break;
case 3:
reg->NegateW = negate;
break;
default:
assert( 0 );
}
}
unsigned
tgsi_util_get_full_src_register_sign_mode(
const struct tgsi_full_src_register *reg,
unsigned component )
{
unsigned sign_mode;
if( reg->SrcRegisterExtMod.Absolute ) {
/* Consider only the post-abs negation. */
if( reg->SrcRegisterExtMod.Negate ) {
sign_mode = TGSI_UTIL_SIGN_SET;
}
else {
sign_mode = TGSI_UTIL_SIGN_CLEAR;
}
}
else {
/* Accumulate the three negations. */
unsigned negate;
negate = reg->SrcRegister.Negate;
if( tgsi_util_get_src_register_extnegate( ®->SrcRegisterExtSwz, component ) ) {
negate = !negate;
}
if( reg->SrcRegisterExtMod.Negate ) {
negate = !negate;
}
if( negate ) {
sign_mode = TGSI_UTIL_SIGN_TOGGLE;
}
else {
sign_mode = TGSI_UTIL_SIGN_KEEP;
}
}
return sign_mode;
}
|
