ncnn
1// Tencent is pleased to support the open source community by making ncnn available.
2//
3// Copyright (C) 2023 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 "celu.h"
16
17namespace ncnn {
18
19CELU::CELU()
20{
21one_blob_only = true;
22support_inplace = true;
23}
24
25int CELU::load_param(const ParamDict& pd)
26{
27alpha = pd.get(0, 1.f);
28
29return 0;
30}
31
32int CELU::forward_inplace(Mat& bottom_top_blob, const Option& opt) const
33{
34int w = bottom_top_blob.w;
35int h = bottom_top_blob.h;
36int d = bottom_top_blob.d;
37int channels = bottom_top_blob.c;
38int size = w * h * d;
39
40#pragma omp parallel for num_threads(opt.num_threads)
41for (int q = 0; q < channels; q++)
42{
43float* ptr = bottom_top_blob.channel(q);
44
45for (int i = 0; i < size; i++)
46{
47if (ptr[i] < 0.f)
48ptr[i] = (expf(ptr[i] / alpha) - 1.f) * alpha;
49}
50}
51
52return 0;
53}
54
55} // namespace ncnn
56