1/* Copyright 2018 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_ROLL_OP_H_
17#define TENSORFLOW_CORE_KERNELS_ROLL_OP_H_
18
19#include "third_party/eigen3/unsupported/Eigen/CXX11/Tensor"
20#include "tensorflow/core/framework/numeric_types.h"
21#include "tensorflow/core/framework/op_kernel.h"
22#include "tensorflow/core/framework/tensor_types.h"
23
24namespace tensorflow {
25namespace functor {
26
27template <typename Device, typename T>
28struct Roll {
29 // dim_size - the size of each dimension
30 // dim_range - the number of indices over in the flattened tensor
31 // you need to skip in order to make it over from one side of a dimension
32 // to the other. Used to make the shifts wrap around after a threshold.
33 // threshold - the index for each dimension that the roll starts to wrap
34 // back to the front
35 // isd - inner shift dimension
36 void operator()(const OpKernelContext* context, const int64_t num_elements,
37 const int num_dims, const gtl::ArraySlice<int32> dim_size,
38 const T* input, T* output,
39 const gtl::ArraySlice<int32> threshold,
40 const gtl::ArraySlice<int64_t> dim_range, const int64_t isd);
41};
42
43} // namespace functor
44} // namespace tensorflow
45
46#endif // TENSORFLOW_CORE_KERNELS_ROLL_OP_H_
47