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
|
[require]
GL >= 3.3
GLSL >= 3.30
GL_ARB_shader_storage_buffer_object
GL_ARB_shader_atomic_counters
[vertex shader passthrough]
[fragment shader]
#version 330
#extension GL_ARB_shader_storage_buffer_object: require
#extension GL_ARB_shader_atomic_counters: require
#line 100
layout(binding = 0, std430) buffer bufblock {
int array[64];
int value;
};
layout(binding = 0) uniform atomic_uint fail;
out vec4 color;
void main()
{
int x = int(gl_FragCoord.x);
int y = int(gl_FragCoord.y);
int local_index = y * array.length() + x;
int v;
/* For value, every instance should get 5. */
v = atomicMin(value, 7 + local_index);
if (v != 5)
atomicCounterIncrement(fail);
if (value != 5)
atomicCounterIncrement(fail);
if (local_index < int(array.length())) {
int first_expected = local_index * 4;
int second_expected = -first_expected;
/* The per-instance value should give the old value on the
* first step. This is expected to be the byte offset of the
* current array element.
*/
v = atomicMin(array[local_index], second_expected);
if (v != first_expected)
atomicCounterIncrement(fail);
/* The per-instance value should give the new value on the
* second step. This is expected to be the negative byte
* offset of the current array element.
*/
v = atomicExchange(array[local_index], first_expected);
if (v != second_expected)
atomicCounterIncrement(fail);
color = vec4(0.0, 1.0, 0.0, 1.0);
} else {
color = vec4(0.0, 0.0, 1.0, 1.0);
}
}
[test]
atomic counters 1
ssbo 0 260
ssbo 0 subdata int 0 0
ssbo 0 subdata int 4 4
ssbo 0 subdata int 8 8
ssbo 0 subdata int 12 12
ssbo 0 subdata int 16 16
ssbo 0 subdata int 20 20
ssbo 0 subdata int 24 24
ssbo 0 subdata int 28 28
ssbo 0 subdata int 32 32
ssbo 0 subdata int 36 36
ssbo 0 subdata int 40 40
ssbo 0 subdata int 44 44
ssbo 0 subdata int 48 48
ssbo 0 subdata int 52 52
ssbo 0 subdata int 56 56
ssbo 0 subdata int 60 60
ssbo 0 subdata int 64 64
ssbo 0 subdata int 68 68
ssbo 0 subdata int 72 72
ssbo 0 subdata int 76 76
ssbo 0 subdata int 80 80
ssbo 0 subdata int 84 84
ssbo 0 subdata int 88 88
ssbo 0 subdata int 92 92
ssbo 0 subdata int 96 96
ssbo 0 subdata int 100 100
ssbo 0 subdata int 104 104
ssbo 0 subdata int 108 108
ssbo 0 subdata int 112 112
ssbo 0 subdata int 116 116
ssbo 0 subdata int 120 120
ssbo 0 subdata int 124 124
ssbo 0 subdata int 128 128
ssbo 0 subdata int 132 132
ssbo 0 subdata int 136 136
ssbo 0 subdata int 140 140
ssbo 0 subdata int 144 144
ssbo 0 subdata int 148 148
ssbo 0 subdata int 152 152
ssbo 0 subdata int 156 156
ssbo 0 subdata int 160 160
ssbo 0 subdata int 164 164
ssbo 0 subdata int 168 168
ssbo 0 subdata int 172 172
ssbo 0 subdata int 176 176
ssbo 0 subdata int 180 180
ssbo 0 subdata int 184 184
ssbo 0 subdata int 188 188
ssbo 0 subdata int 192 192
ssbo 0 subdata int 196 196
ssbo 0 subdata int 200 200
ssbo 0 subdata int 204 204
ssbo 0 subdata int 208 208
ssbo 0 subdata int 212 212
ssbo 0 subdata int 216 216
ssbo 0 subdata int 220 220
ssbo 0 subdata int 224 224
ssbo 0 subdata int 228 228
ssbo 0 subdata int 232 232
ssbo 0 subdata int 236 236
ssbo 0 subdata int 240 240
ssbo 0 subdata int 244 244
ssbo 0 subdata int 248 248
ssbo 0 subdata int 252 252
ssbo 0 subdata int 256 5
clear color 0.5 0.5 0.5 0.5
clear
draw rect -1 -1 2 2
probe atomic counter 0 == 0
|
