1/* Copyright 2015 The TensorFlow Authors. All Rights Reserved.
2
3Licensed under the Apache License, Version 2.0 (the "License");
4you may not use this file except in compliance with the License.
5You may obtain a copy of the License at
6
7 http://www.apache.org/licenses/LICENSE-2.0
8
9Unless required by applicable law or agreed to in writing, software
10distributed under the License is distributed on an "AS IS" BASIS,
11WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12See the License for the specific language governing permissions and
13limitations under the License.
14==============================================================================*/
15
16#ifndef TENSORFLOW_CORE_KERNELS_REVERSE_OP_H_
17#define TENSORFLOW_CORE_KERNELS_REVERSE_OP_H_
18
19#include "third_party/eigen3/unsupported/Eigen/CXX11/Tensor"
20#include "tensorflow/core/framework/tensor_types.h"
21
22namespace tensorflow {
23namespace functor {
24
25// Functor used by ReverseOp to do the computations.
26template <typename Device, typename T, int Dims>
27struct Reverse {
28 void operator()(const Device& d, typename TTypes<T, Dims>::ConstTensor input,
29 const Eigen::array<bool, Dims>& reverse_dims,
30 typename TTypes<T, Dims>::Tensor output) {
31 output.device(d) = input.reverse(reverse_dims);
32 }
33};
34
35template <typename Device, typename T>
36struct Reverse<Device, T, 0> {
37 void operator()(const Device& d, typename TTypes<T, 0>::ConstTensor input,
38 const Eigen::array<bool, 0>& reverse_dims,
39 typename TTypes<T, 0>::Tensor output) {
40 // Reversing a scalar is copying it.
41 output.device(d) = input;
42 }
43};
44
45} // namespace functor
46} // namespace tensorflow
47
48#endif // TENSORFLOW_CORE_KERNELS_REVERSE_OP_H_
49