blob: 29bd77d7e1c886f6d806ffef23fc07015bdba99c (
plain)
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
|
#version 450
#extension GL_EXT_control_flow_attributes : enable
#include "generic_head.comp"
#include "types.comp"
layout(constant_id = 0) const uint BLOCK_SIZE = 32;
layout(local_size_x_id = 0, local_size_y = 1, local_size_z = 1) in;
// In this shader Y = softmax(X) and X is not provided as input.
layout (binding = 0) readonly buffer G {A_TYPE data_g[];};
layout (binding = 1) readonly buffer Y {B_TYPE data_y[];};
layout (binding = 2) buffer D {D_TYPE data_d[];};
shared FLOAT_TYPE sum_yg[BLOCK_SIZE];
void main() {
const uint row = gl_WorkGroupID.z * 262144 + gl_WorkGroupID.y * 512 + gl_WorkGroupID.x;
const uint tid = gl_LocalInvocationID.x;
FLOAT_TYPE scale = p.param1;
// partial sums for thread in warp
sum_yg[tid] = FLOAT_TYPE(0.0f);
[[unroll]] for (uint col = tid; col < p.KX; col += BLOCK_SIZE) {
const FLOAT_TYPE gi = FLOAT_TYPE(data_g[row*p.KX + col]);
const FLOAT_TYPE yi = FLOAT_TYPE(data_y[row*p.KX + col]);
sum_yg[tid] += yi * gi;
}
// sum up partial sums and write back result
barrier();
[[unroll]] for (uint s = BLOCK_SIZE / 2; s > 0; s >>= 1) {
if (tid < s) {
sum_yg[tid] += sum_yg[tid + s];
}
barrier();
}
const FLOAT_TYPE dot_yg = sum_yg[0];
[[unroll]] for (uint col = tid; col < p.KX; col += BLOCK_SIZE) {
data_d[row*p.KX + col] = D_TYPE(scale
* (FLOAT_TYPE(data_g[row*p.KX + col]) - dot_yg)
* FLOAT_TYPE(data_y[row*p.KX + col]));
}
}
|
