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/*
* Copyright (c) 2018 ARM Limited.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef __ARM_COMPUTE_DETAIL_NEACTIVATION_FUNCTION_DETAIL_H__
#define __ARM_COMPUTE_DETAIL_NEACTIVATION_FUNCTION_DETAIL_H__
#include "arm_compute/core/NEON/wrapper/wrapper.h"
namespace arm_compute
{
namespace detail
{
/** Dummy activation object */
template <typename T, int S>
struct dummy
{
/** NEON vector type. */
using ExactType = typename wrapper::traits::neon_vector<T, S>::type;
/** Construct a dummy activation object.
*
* @param[in] act_info Activation layer information.
*/
explicit dummy(ActivationLayerInfo act_info)
{
ARM_COMPUTE_UNUSED(act_info);
}
/** Run activation function.
*
* @param[in] vval Vector of values.
*/
void operator()(ExactType &vval)
{
ARM_COMPUTE_UNUSED(vval);
}
};
/** RELU activation object */
template <typename T, int S>
struct relu
{
/** NEON vector type. */
using ExactType = typename wrapper::traits::neon_vector<T, S>::type;
/** NEON vector tag type. */
using ExactTagType = typename wrapper::traits::neon_vector<T, S>::tag_type;
/** Construct a RELU activation object.
*
* @param[in] act_info Activation layer information.
*/
explicit relu(ActivationLayerInfo act_info)
: vzero(wrapper::vdup_n(static_cast<T>(0.f), ExactTagType{}))
{
ARM_COMPUTE_UNUSED(act_info);
}
/** Run activation function.
*
* @param[in] vval Vector of values.
*/
void operator()(ExactType &vval)
{
vval = wrapper::vmax(vzero, vval);
}
/** Vector of zeroes. */
const ExactType vzero;
};
/** Bounded RELU activation object */
template <typename T, int S>
struct brelu
{
/** NEON vector type. */
using ExactType = typename wrapper::traits::neon_vector<T, S>::type;
/** NEON vector tag type. */
using ExactTagType = typename wrapper::traits::neon_vector<T, S>::tag_type;
/** Construct a bounded RELU activation object.
*
* @param[in] act_info Activation layer information.
*/
explicit brelu(ActivationLayerInfo act_info)
: vzero(wrapper::vdup_n(static_cast<T>(0.f), ExactTagType{})),
valpha(wrapper::vdup_n(static_cast<T>(act_info.a()), ExactTagType{}))
{
}
/** Run activation function.
*
* @param[in] vval Vector of values.
*/
void operator()(ExactType &vval)
{
vval = wrapper::vmin(valpha, wrapper::vmax(vzero, vval));
}
/** Vector of zeroes. */
const ExactType vzero;
/** Vector of alphas. */
const ExactType valpha;
};
/** Lower-Upper Bounded RELU activation object */
template <typename T, int S>
struct lubrelu
{
/** NEON vector type. */
using ExactType = typename wrapper::traits::neon_vector<T, S>::type;
/** NEON vector tag type. */
using ExactTagType = typename wrapper::traits::neon_vector<T, S>::tag_type;
/** Construct a lower-upper bounded RELU activation object.
*
* @param[in] act_info Activation layer information.
*/
explicit lubrelu(ActivationLayerInfo act_info)
: valpha(wrapper::vdup_n(static_cast<T>(act_info.a()), ExactTagType{})),
vbeta(wrapper::vdup_n(static_cast<T>(act_info.b()), ExactTagType{}))
{
}
/** Run activation function.
*
* @param[in] vval Vector of values.
*/
void operator()(ExactType &vval)
{
vval = wrapper::vmin(valpha, wrapper::vmax(vbeta, vval));
}
/** Vector of alphas. */
const ExactType valpha;
/** Vector of betas. */
const ExactType vbeta;
};
} // namespace detail
} // namespace arm_compute
#endif /* __ARM_COMPUTE_DETAIL_NEACTIVATION_FUNCTION_DETAIL_H__ */
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