  Status operator()(const GPUDevice& d,
                    typename TTypes<qint8, 4, int>::ConstTensor in,
                    int input_pad_top, int input_pad_bottom, int input_pad_left,
                    int input_pad_right,
                    typename TTypes<qint8, 4, int>::Tensor out,
                    TensorFormat format) {
    return errors::InvalidArgument(
        "Explicit padding not yet supported with qint8");
  }
  Status operator()(const GPUDevice& d,
                    typename TTypes<qint8, 4, int>::ConstTensor in,
                    int input_pad_top, int input_pad_bottom, int input_pad_left,
                    int input_pad_right,
                    typename TTypes<qint8, 4, int>::Tensor out,
                    TensorFormat format) {
    return errors::InvalidArgument(
        "Explicit padding not yet supported with qint8");
  }