arm_compute/core/ActivationLayerInfo.h

/*
 * Copyright (c) 2016-2023 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_ACTIVATIONLAYERINFO_H
#define ARM_COMPUTE_ACTIVATIONLAYERINFO_H

#include "arm_compute/core/Coordinates.h"
#include "arm_compute/core/QuantizationInfo.h"
#include "arm_compute/core/Size2D.h"
#include "arm_compute/core/Size3D.h"
#include "arm_compute/core/Strides.h"
#include "arm_compute/core/TensorShape.h"
#include "arm_compute/core/Types.h"
#include "arm_compute/core/experimental/IPostOp.h"
#include "arm_compute/core/utils/misc/Macros.h"
#include "support/Bfloat16.h"
#include "support/Half.h"

#include <cmath>
#include <cstddef>
#include <cstdint>
#include <map>
#include <string>
#include <utility>

namespace arm_compute
{
/** Activation Layer Information class */
class ActivationLayerInfo
{
public:
    typedef arm_compute::ActivationFunction ActivationFunction;

    /** Lookup table  */
    using LookupTable256 = std::array<qasymm8_t, 256>;

    ActivationLayerInfo() = default;
    /** Default Constructor
     *
     * @param[in] f The activation function to use.
     * @param[in] a (Optional) The alpha parameter used by some activation functions
     *              (@ref ActivationFunction::BOUNDED_RELU, @ref ActivationFunction::LU_BOUNDED_RELU, @ref ActivationFunction::LINEAR, @ref ActivationFunction::TANH).
     * @param[in] b (Optional) The beta parameter used by some activation functions (@ref ActivationFunction::LINEAR, @ref ActivationFunction::LU_BOUNDED_RELU, @ref ActivationFunction::TANH).
     */
    ActivationLayerInfo(ActivationFunction f, float a = 0.0f, float b = 0.0f)
        : _act(f), _a(a), _b(b), _enabled(true)
    {
    }
    /** Get the type of activation function */
    ActivationFunction activation() const
    {
        return _act;
    }
    /** Get the alpha value */
    float a() const
    {
        return _a;
    }
    /** Get the beta value */
    float b() const
    {
        return _b;
    }
    /** Check if initialised */
    bool enabled() const
    {
        return _enabled;
    }

#ifdef __aarch64__
    const LookupTable256 &lut() const
    {
        return _lut;
    }
    void setLookupTable256(LookupTable256 &lut)
    {
        _lut = std::move(lut);
    }
#endif // __aarch64__
private:
    ActivationFunction _act     = { ActivationLayerInfo::ActivationFunction::IDENTITY };
    float              _a       = {};
    float              _b       = {};
    bool               _enabled = { false };

#ifdef __aarch64__
    LookupTable256 _lut = {};
#endif // __aarch64__
};
} // namespace arm_compute
#endif /* ARM_COMPUTE_ACTIVATIONLAYERINFO_H */