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26 lines
653 B
26 lines
653 B
struct MatrixBatch {
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size: vec4<u32>,
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data: array<vec4<f32>>,
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}
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@group(0) @binding(0)
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var<storage, read> m: MatrixBatch;
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@group(0) @binding(1)
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var<storage, read> dldm: MatrixBatch;
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@group(0) @binding(2)
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var<storage, read_write> grad: MatrixBatch;
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@compute @workgroup_size(1)
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fn main(@builtin(global_invocation_id) global_id: vec3<u32>) {
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grad.size = m.size;
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let vc = m.size.x / 4;
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let ro = (global_id.z * m.size.y + global_id.y) * vc;
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var s = 0f;
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for (var x = 0u; x < vc; x++) {
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s += dot(m.data[ro + x], dldm.data[ro + x]);
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}
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grad.data[ro + global_id.x] = m.data[ro + global_id.x] * (dldm.data[ro + global_id.x] - vec4(s));
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}
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