maxPool1dGPU function

GPUTensor<Vector> maxPool1dGPU(
  1. GPUTensor<Vector> input,
  2. int poolSize,
  3. int stride,
  4. CommandBuffer tape,
)

Implementation

GPUTensor<Vector> maxPool1dGPU(GPUTensor<Vector> input, int poolSize, int stride, CommandBuffer tape) {
  int inputSize = input.shape[0];
  int outputSize = (inputSize - poolSize) ~/ stride + 1;

  GPUTensor<Vector> out = GPUTensor<Vector>(List<double>.filled(outputSize, 0.0));
  GPUTensor<Vector> indices = GPUTensor<Vector>(List<double>.filled(outputSize, 0.0));

  tape.putInt(OP_MAX_POOL_1D_FORWARD);
  tape.putString(input.id);
  tape.putString(out.id);
  tape.putString(indices.id);
  tape.putInt(poolSize);
  tape.putInt(stride);

  out.creator = GPUNode(
    [input],
        (CommandBuffer bTape) {
      bTape.putInt(OP_MAX_POOL_1D_BACKWARD);
      bTape.putString('${out.id}_grad');
      bTape.putString(indices.id);
      bTape.putString('${input.id}_grad');
    },
    opName: 'maxPool1dGPU',
    cost: inputSize,
  );

  return out;
}