gpuFold (Function)

Signature: gpuFold(buffer: GpuBuffer<int> | GpuBuffer<float> | GpuBuffer<bool>, initial: t1, combine: (t1, t0) -> t1) -> t1

Description: Reduces a buffer to one scalar with a pure combine function. Use an associative combine: a device backend may reassociate.

Parameters

• buffer (GpuBuffer | GpuBuffer | GpuBuffer): The buffer to reduce
• initial (t1): The initial scalar accumulator
• combine ((t1, t0) -> t1): The pure (accumulator, element) function

Returns: t1

Example

toGpu([1, 2, 3]) |> gpuFold(0, fn(a, x) => (a + x) ?: a)

toGpu [1, 2, 3] |> gpuFold (0, \(a, x) => (a + x) ?: a)