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) buffer X {A_TYPE x[];};
11layout (binding = 1) readonly buffer G {A_TYPE grad[];};
12layout (binding = 2) buffer GM {A_TYPE gradm[];};
13layout (binding = 3) buffer GV {A_TYPE gradv[];};
14layout (binding = 4) readonly buffer P {float params[7];};
15
16void main() {
17    const uint i = gl_GlobalInvocationID.z * 262144 + gl_GlobalInvocationID.y * 512 + gl_GlobalInvocationID.x;
18
19    if (i >= p.KX) {
20        return;
21    }
22
23    const float alpha  = params[0];
24    const float beta1  = params[1];
25    const float beta2  = params[2];
26    const float eps    = params[3];
27    const float wd     = params[4];
28    const float beta1h = params[5];
29    const float beta2h = params[6];
30
31    const float gi = grad[i];
32    const float gmi = gradm[i]*beta1 +    gi*(1.0f - beta1);
33    const float gvi = gradv[i]*beta2 + gi*gi*(1.0f - beta2);
34
35    gradm[i] = gmi;
36    gradv[i] = gvi;
37
38    const float mh =      gmi*beta1h;
39    const float vh = sqrt(gvi*beta2h) + eps;
40
41    x[i] = x[i]*(1.0f - alpha*wd) - alpha*mh/vh;
42}