#version 450

#include "generic_head.glsl"

layout(local_size_x = 512, local_size_y = 1, local_size_z = 1) in;

layout (binding = 0) buffer X {A_TYPE data_x[];};
layout (binding = 1) readonly buffer G {A_TYPE data_grad[];};
layout (binding = 2) readonly buffer P {float data_params[2];};

void main() {
    const uint i = gl_GlobalInvocationID.z * 262144 + gl_GlobalInvocationID.y * 512 + gl_GlobalInvocationID.x;

    if (i >= p.KX) {
        return;
    }

    const float alpha = data_params[0];
    const float keep = 1.f - alpha * data_params[1];

    data_x[i] = data_x[i] * keep - alpha * data_grad[i];
}