transposeGPU function

GPUTensor<Matrix> transposeGPU(GPUTensor<Matrix> a, CommandBuffer tape)

Implementation

GPUTensor<Matrix> transposeGPU(GPUTensor<Matrix> a, CommandBuffer tape) {
  int M = a.shape[0];
  int N = a.shape[1];

  GPUTensor<Matrix> out = GPUTensor<Matrix>.empty(<int>[N, M]);
  // tmpGrad must match original input shape [M, N]
  GPUTensor<Matrix> tmpGrad = GPUTensor<Matrix>.empty(<int>[M, N]);

  tape.putInt(OP_TRANSPOSE);
  tape.putString(a.id);
  tape.putString(out.id);

  out.creator = GPUNode(
    [a],
        (CommandBuffer bTape) {
      bTape.putInt(OP_TRANSPOSE);
      bTape.putString('${out.id}_grad');
      bTape.putString(tmpGrad.id);

      bTape.putInt(OP_ADD_INTO);
      bTape.putString(tmpGrad.id);
      bTape.putString('${a.id}_grad');
    },
    opName: 'transposeGPU',
    extraParams: {'tmpGrad': tmpGrad},
    cost: 0,
  );

  return out;
}