addScalarVectorGPU function

GPUTensor<Vector> addScalarVectorGPU(
  1. GPUTensor<Vector> v,
  2. double scalar,
  3. CommandBuffer tape, {
  4. GPUTensor<Vector>? outTensor,
})

Appends a command for adding a scalar b to every element of a vector v to tape.

Implementation

GPUTensor<Vector> addScalarVectorGPU(
    GPUTensor<Vector> v, double scalar, CommandBuffer tape,
    {GPUTensor<Vector>? outTensor}) {
  int length = v.shape[0];
  GPUTensor<Vector> out = outTensor ?? GPUTensor<Vector>.empty(<int>[length]);

  tape.putInt(OP_ADD_SCALAR);
  tape.putString(v.id);
  tape.putString(out.id);
  tape.putFloat(scalar);

  out.creator = GPUNode(
    <GPUTensor>[v],
    (CommandBuffer bTape) {
      // The derivative of (x + c) is 1, so the gradient passes directly through
      bTape.putInt(OP_ADD_INTO);
      bTape.putString(out.gradId);
      bTape.putString(v.gradId);
    },
    opName: 'addScalarVectorGPU',
    cost: length,
  );

  return out;
}