xref: /aosp_15_r20/external/tensorflow/tensorflow/core/kernels/roll_op.h (revision b6fb3261f9314811a0f4371741dbb8839866f948)
1 /* Copyright 2018 The TensorFlow Authors. All Rights Reserved.
2 
3 Licensed under the Apache License, Version 2.0 (the "License");
4 you may not use this file except in compliance with the License.
5 You may obtain a copy of the License at
6 
7     http://www.apache.org/licenses/LICENSE-2.0
8 
9 Unless required by applicable law or agreed to in writing, software
10 distributed under the License is distributed on an "AS IS" BASIS,
11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 See the License for the specific language governing permissions and
13 limitations under the License.
14 ==============================================================================*/
15 
16 #ifndef TENSORFLOW_ROLL_H
17 #define TENSORFLOW_ROLL_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 
24 namespace tensorflow {
25 namespace functor {
26 
27 template <typename Device, typename T>
28 struct 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_ROLLL_H
47