1/* Copyright 2019 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 TFLITE_WITH_RUY
17
18#include "tensorflow/lite/kernels/cpu_backend_gemm_eigen.h"
19
20// See b/131835803: in TFLite code, because eigen_spatial_convolutions.h does
21// #define Eigen EigenForTFLite, it is difficult to have any #include of Eigen
22// headers in a header file, as that results in name classes (compilation
23// errors) depending on the order in which these headers are #included.
24// So we have moved the #include of Eigen here, in a .cc file, where we have
25// control over the header #include sequence.
26#include "third_party/eigen3/Eigen/Core"
27#include "tensorflow/lite/kernels/cpu_backend_context.h"
28#include "tensorflow/lite/kernels/cpu_backend_gemm_params.h"
29#include "tensorflow/lite/kernels/internal/common.h"
30
31namespace tflite {
32namespace cpu_backend_gemm {
33namespace detail {
34
35// This function is out-of-line in a .cc file because of the issue
36// noted above in the comment on the #include for Eigen/Core.
37void GemmImplUsingEigen::Run(
38 const MatrixParams<float>& lhs_params, const float* lhs_data,
39 const MatrixParams<float>& rhs_params, const float* rhs_data,
40 const MatrixParams<float>& dst_params, float* dst_data,
41 const GemmParams<float, float>& params, CpuBackendContext* /* context */) {
42 // This code assumes specific storage orders, encoded in these Eigen types.
43 // These assumptions have been checked by TF_LITE_ASSERT's in the public
44 // Gemm entry point already, before the implementation gets to this point.
45 using EigenMatrixMapRowMajorConst =
46 Eigen::Map<const Eigen::Matrix<float, Eigen::Dynamic, Eigen::Dynamic,
47 Eigen::RowMajor>>;
48 using EigenMatrixMapColMajorConst =
49 Eigen::Map<const Eigen::Matrix<float, Eigen::Dynamic, Eigen::Dynamic,
50 Eigen::ColMajor>>;
51 using EigenMatrixMapColMajorMutable = Eigen::Map<
52 Eigen::Matrix<float, Eigen::Dynamic, Eigen::Dynamic, Eigen::ColMajor>>;
53
54 EigenMatrixMapRowMajorConst eigen_lhs(lhs_data, lhs_params.rows,
55 lhs_params.cols);
56 EigenMatrixMapColMajorConst eigen_rhs(rhs_data, rhs_params.rows,
57 rhs_params.cols);
58 EigenMatrixMapColMajorMutable eigen_dst(dst_data, dst_params.rows,
59 dst_params.cols);
60
61 if (rhs_params.cols == 1) {
62 eigen_dst.col(0).noalias() = eigen_lhs * eigen_rhs.col(0);
63 } else if (lhs_params.rows == 1) {
64 eigen_dst.row(0).noalias() = eigen_lhs.row(0) * eigen_rhs;
65 } else {
66 eigen_dst.noalias() = eigen_lhs * eigen_rhs;
67 }
68
69 if (params.bias) {
70 BiasAndClamp(params.clamp_min, params.clamp_max, dst_params.rows,
71 params.bias, dst_params.rows * dst_params.cols, dst_data);
72 } else {
73 eigen_dst = eigen_dst.cwiseMin(params.clamp_max).cwiseMax(params.clamp_min);
74 }
75}
76
77} // namespace detail
78} // namespace cpu_backend_gemm
79} // namespace tflite
80
81#endif // not TFLITE_WITH_RUY
82