1 // Tencent is pleased to support the open source community by making ncnn available.
2 //
3 // Copyright (C) 2020 THL A29 Limited, a Tencent company. All rights reserved.
4 //
5 // Licensed under the BSD 3-Clause License (the "License"); you may not use this file except
6 // in compliance with the License. You may obtain a copy of the License at
7 //
8 // https://opensource.org/licenses/BSD-3-Clause
9 //
10 // Unless required by applicable law or agreed to in writing, software distributed
11 // under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
12 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
13 // specific language governing permissions and limitations under the License.
14 
15 #include "softplus.h"
16 
17 #include <math.h>
18 
19 namespace ncnn {
20 
Softplus()21 Softplus::Softplus()
22 {
23     one_blob_only = true;
24     support_inplace = true;
25 }
26 
forward_inplace(Mat & bottom_top_blob,const Option & opt) const27 int Softplus::forward_inplace(Mat& bottom_top_blob, const Option& opt) const
28 {
29     int w = bottom_top_blob.w;
30     int h = bottom_top_blob.h;
31     int channels = bottom_top_blob.c;
32     int size = w * h;
33 
34     #pragma omp parallel for num_threads(opt.num_threads)
35     for (int q = 0; q < channels; q++)
36     {
37         float* ptr = bottom_top_blob.channel(q);
38         for (int i = 0; i < size; i++)
39         {
40             ptr[i] = log(exp(ptr[i]) + 1.0f);
41         }
42     }
43 
44     return 0;
45 }
46 
47 } // namespace ncnn
48