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shaders/silu.wgsl

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+// silu.wgsl — element-wise SiLU/Swish activation, in-place.
+// silu(x) = x * sigmoid(x) = x / (1 + exp(-x))
+
+struct Params { n: u32, }
+@group(0) @binding(0) var<storage, read_write> data: array<f32>;
+@group(1) @binding(0) var<uniform> params: Params;
+
+@compute @workgroup_size(64)
+fn main(@builtin(global_invocation_id) gid: vec3<u32>) {
+    let i = gid.x;
+    if (i >= params.n) { return; }
+    let x = data[i];
+    let s = 1.0 / (1.0 + exp(-x));
+    data[i] = x * s;
+}