1#version 450
 2
 3#include "generic_head.glsl"
 4#include "types.glsl"
 5
 6#extension GL_EXT_control_flow_attributes : enable
 7
 8layout(local_size_x = 512, local_size_y = 1, local_size_z = 1) in;
 9
10layout (binding = 0) readonly buffer G {A_TYPE data_g[];};
11layout (binding = 1) readonly buffer X {B_TYPE data_x[];};
12layout (binding = 2) writeonly buffer D {D_TYPE data_d[];};
13
14void main() {
15    const uint i = gl_GlobalInvocationID.z * 262144 + gl_GlobalInvocationID.y * 512 + gl_GlobalInvocationID.x;
16
17    if (i >= p.KX) {
18        return;
19    }
20
21    // Compute derivative of SiLU(x): 1/(1+exp(-x)) - x*exp(-x)/(1+exp(-x))^2
22
23    const float xi = float(data_x[i]);
24    const float s = 1.0f / (1.0f + exp(-xi));
25    data_d[i] = D_TYPE(data_g[i] * (s + xi * s * (1 - s)));
26}