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/*
* Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
inline void ELU(const float* input_data, const Dims<4>& input_dims,
float alpha, float* output_data,
const Dims<4>& output_dims) {
const auto input = MapAsVector(input_data, input_dims);
auto output = MapAsVector(output_data, output_dims);
output = input.array().min(0.0f);
// Separate op for EXP vectorization
output = output.array().exp();
output = (output.array() - 1.0f) * alpha;
output += input.cwiseMax(0.0f);
}
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