#version 450
/* Swish/SiLU: out = x * sigmoid(x). In-place safe (binding 0 and 1 may alias). */
layout(local_size_x = 256) in;

layout(std430, binding = 0) readonly  buffer In  { float x[]; };
layout(std430, binding = 1) writeonly buffer Out { float outp[]; };

layout(push_constant) uniform PC { uint n; } pc;

void main() {
    uint stride_g = gl_NumWorkGroups.x * 256u;
    for (uint i = gl_GlobalInvocationID.x; i < pc.n; i += stride_g) {
        float v = x[i];
        outp[i] = v / (1.0 + exp(-v));
    }
}