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shaders/softplus.wgsl

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+// softplus.wgsl — element-wise softplus, in-place.
+// softplus(x) = max(x, 0) + log(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];
+    data[i] = max(x, 0.0) + log(1.0 + exp(-abs(x)));
+}