ELU.h

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/*
 * Copyright (c) 2020 Samsung Electronics Co., Ltd. All Rights Reserved
 * Copyright 2018 The TensorFlow Authors. 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.
 */
 
#ifndef __NNFW_CKER_ELU_H__
#define __NNFW_CKER_ELU_H__
 
#include "cker/Shape.h"
 
#include <cmath>
 
namespace nnfw
{
namespace cker
{
 
inline void ELU(const Shape &input_shape, const float *input_data, const Shape &output_shape,
                float *output_data)
{
  const int flat_size = MatchingFlatSize(input_shape, output_shape);
  for (int i = 0; i < flat_size; ++i)
  {
    const float val = input_data[i];
    output_data[i] = val < 0.0 ? std::exp(val) - 1 : val;
  }
}
 
} // namespace cker
} // namespace nnfw
 
#endif // __NNFW_CKER_ELU_H__