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Diffstat (limited to 'arm_compute/function_info/ActivationLayerInfo.h')
| -rw-r--r-- | arm_compute/function_info/ActivationLayerInfo.h | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/arm_compute/function_info/ActivationLayerInfo.h b/arm_compute/function_info/ActivationLayerInfo.h new file mode 100644 index 0000000000..9390d0c54f --- /dev/null +++ b/arm_compute/function_info/ActivationLayerInfo.h @@ -0,0 +1,136 @@ +/* + * Copyright (c) 2016-2024 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 ACL_ARM_COMPUTE_FUNCTION_INFO_ACTIVATIONLAYERINFO_H +#define ACL_ARM_COMPUTE_FUNCTION_INFO_ACTIVATIONLAYERINFO_H + +#include "arm_compute/core/CoreTypes.h" +#include "arm_compute/core/Error.h" +#include "arm_compute/core/QuantizationInfo.h" + +#include <array> +#include <memory> + +#ifdef __aarch64__ +#include <arm_neon.h> +#endif // __arch64__ + +namespace arm_compute +{ +/** Available activation functions */ +enum class ActivationFunction +{ + LOGISTIC, /**< Logistic ( \f$ f(x) = \frac{1}{1 + e^{-x}} \f$ ) */ + TANH, /**< Hyperbolic tangent ( \f$ f(x) = a \cdot tanh(b \cdot x) \f$ ) */ + RELU, /**< Rectifier ( \f$ f(x) = max(0,x) \f$ ) */ + BOUNDED_RELU, /**< Upper Bounded Rectifier ( \f$ f(x) = min(a, max(0,x)) \f$ ) */ + LU_BOUNDED_RELU, /**< Lower and Upper Bounded Rectifier ( \f$ f(x) = min(a, max(b,x)) \f$ ) */ + LEAKY_RELU, /**< Leaky Rectifier ( \f$ f(x) = \begin{cases} \alpha x & \quad \text{if } x \text{ < 0}\\ x & \quad \text{if } x \geq \text{ 0 } \end{cases} \f$ ) */ + SOFT_RELU, /**< Soft Rectifier ( \f$ f(x)= log(1+e^x) \f$ ) */ + ELU, /**< Exponential Linear Unit ( \f$ f(x) = \begin{cases} \alpha (exp(x) - 1) & \quad \text{if } x \text{ < 0}\\ x & \quad \text{if } x \geq \text{ 0 } \end{cases} \f$ ) */ + ABS, /**< Absolute ( \f$ f(x)= |x| \f$ ) */ + SQUARE, /**< Square ( \f$ f(x)= x^2 \f$ )*/ + SQRT, /**< Square root ( \f$ f(x) = \sqrt{x} \f$ )*/ + LINEAR, /**< Linear ( \f$ f(x)= ax + b \f$ ) */ + IDENTITY, /**< Identity ( \f$ f(x)= x \f$ ) */ + HARD_SWISH, /**< Hard-swish ( \f$ f(x) = (x \text{ReLU6}(x+3))/6 = x \min(\max(0,x+3),6)/6 \f$ ) */ + SWISH, /**< Swish ( \f$ f(x) = \frac{x}{1 + e^{-ax}} = x \text{logistic}(ax) \f$ ) */ + GELU /**< GELU ( \f$ f(x) = x * 1/2 * 1 + erf(x / \sqrt{2}) \f$ ) */ +}; +/** Activation Layer Information class */ +class ActivationLayerInfo +{ +public: + typedef arm_compute::ActivationFunction ActivationFunction; + + /** Lookup table */ +#ifdef __aarch64__ + using LookupTable256 = std::array<qasymm8_t, 256>; + using LookupTable65536 = std::array<float16_t, 65536>; +#endif // __aarch64__ + + 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); + } + + const LookupTable65536 &lut_fp16() const + { + ARM_COMPUTE_ERROR_ON(_lut_fp16 == nullptr); + return *_lut_fp16; + } + void setLookupTable65536(std::shared_ptr<LookupTable65536> lut) + { + _lut_fp16 = lut; + } +#endif // __aarch64__ +private: + ActivationFunction _act = {ActivationLayerInfo::ActivationFunction::IDENTITY}; + float _a = {}; + float _b = {}; + bool _enabled = {false}; + +#ifdef __aarch64__ + LookupTable256 _lut = {}; + std::shared_ptr<LookupTable65536> _lut_fp16{nullptr}; +#endif // __aarch64__ +}; +} // namespace arm_compute +#endif // ACL_ARM_COMPUTE_FUNCTION_INFO_ACTIVATIONLAYERINFO_H |