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_TILE_OPS_IMPL_H_
17#define TENSORFLOW_CORE_KERNELS_TILE_OPS_IMPL_H_
18
19#include "third_party/eigen3/unsupported/Eigen/CXX11/Tensor"
20#include "tensorflow/core/framework/tensor_types.h"
21#include "tensorflow/core/platform/types.h"
22
23namespace tensorflow {
24
25namespace functor {
26
27template <typename Device, typename T, int NDIM>
28struct TileGrad {
29 void operator()(const Device& d, typename TTypes<T, NDIM>::Tensor out,
30 typename TTypes<T, NDIM>::ConstTensor in,
31 const Eigen::DSizes<Eigen::DenseIndex, NDIM>& indices,
32 const Eigen::DSizes<Eigen::DenseIndex, NDIM>& sizes,
33 bool first) const {
34 if (first) {
35 out.device(d) = in.slice(indices, sizes);
36 } else {
37 out.device(d) += in.slice(indices, sizes);
38 }
39 }
40};
41
42template <typename Device, typename T>
43struct TileGrad<Device, T, 0> {
44 void operator()(const Device& d, typename TTypes<T, 0>::Tensor out,
45 typename TTypes<T, 0>::ConstTensor in,
46 const Eigen::DSizes<Eigen::DenseIndex, 0>&,
47 const Eigen::DSizes<Eigen::DenseIndex, 0>&,
48 bool first) const {
49 if (first) {
50 out.device(d) = in;
51 } else {
52 out.device(d) += in;
53 }
54 }
55};
56
57template <typename Device, typename T, int NDIM, int REDUCEDNDIM>
58struct ReduceAndReshape {
59 void operator()(
60 const Device& d, typename TTypes<T, NDIM>::Tensor out,
61 typename TTypes<T, NDIM>::ConstTensor in,
62 const Eigen::DSizes<Eigen::DenseIndex, REDUCEDNDIM>& reduce_dim,
63 const Eigen::DSizes<Eigen::DenseIndex, NDIM>& reshape_dim) const {
64 out.device(d) = in.sum(reduce_dim).reshape(reshape_dim);
65 }
66};
67
68} // end namespace functor
69} // end namespace tensorflow
70
71#endif // TENSORFLOW_CORE_KERNELS_TILE_OPS_IMPL_H_
72