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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.
*/
/*
* Copyright (C) 2017 The Android Open Source Project
*
* 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 ANDROID_ML_NN_COMMON_OPERATIONS_INTERNAL_COMMON_H_
#define ANDROID_ML_NN_COMMON_OPERATIONS_INTERNAL_COMMON_H_
#ifndef USE_NEON
#if defined(__ARM_NEON__) || defined(__ARM_NEON)
#define USE_NEON
#include <arm_neon.h>
#endif
#endif
#include <gemmlowp.h>
#include "types.h"
template <FusedActivationFunctionType Ac>
struct ActivationFunctionImpl {};
template <>
struct ActivationFunctionImpl<FusedActivationFunctionType::kNone> {
static float Eval(float x) { return x; }
};
template <>
struct ActivationFunctionImpl<FusedActivationFunctionType::kRelu> {
static float Eval(float x) { return x < 0.f ? 0.f : x; }
};
template <>
struct ActivationFunctionImpl<FusedActivationFunctionType::kRelu1> {
static float Eval(float x) { return x > 1.f ? 1.f : x < -1.f ? -1.f : x; }
};
template <>
struct ActivationFunctionImpl<FusedActivationFunctionType::kRelu6> {
static float Eval(float x) { return x > 6.f ? 6.f : x < 0.f ? 0.f : x; }
};
template <FusedActivationFunctionType Ac>
float ActivationFunction(float x) {
return ActivationFunctionImpl<Ac>::Eval(x);
}
inline int32 MultiplyByQuantizedMultiplierSmallerThanOne(
int32 x, int32 quantized_multiplier, int right_shift) {
using gemmlowp::RoundingDivideByPOT;
using gemmlowp::SaturatingRoundingDoublingHighMul;
return RoundingDivideByPOT(
SaturatingRoundingDoublingHighMul(x, quantized_multiplier), right_shift);
}
inline int32 MultiplyByQuantizedMultiplierGreaterThanOne(
int32 x, int32 quantized_multiplier, int left_shift) {
using gemmlowp::SaturatingRoundingDoublingHighMul;
return SaturatingRoundingDoublingHighMul(x * (1 << left_shift),
quantized_multiplier);
}
#endif // ANDROID_ML_NN_COMMON_OPERATIONS_INTERNAL_COMMON_H_
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