numr 0.5.2

High-performance numerical computing with multi-backend GPU acceleration (CPU/CUDA/WebGPU)
Documentation 
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// Complex phase angle shader
// entry point: angle_complex64

struct Params {
    numel: u32,
}

@group(0) @binding(0) var<storage, read_write> input: array<vec2<f32>>;
@group(0) @binding(1) var<storage, read_write> output: array<f32>;
@group(0) @binding(2) var<uniform> params: Params;

@compute @workgroup_size(256)
fn angle_complex64(@builtin(global_invocation_id) gid: vec3<u32>) {
    let idx = gid.x;
    if (idx < params.numel) {
        let val = input[idx];
        output[idx] = atan2(val.y, val.x);  // Phase angle in radians [-π, π]
    }
}