From 7467ba8fac0afb19d750b3bdda9ba95002634038 Mon Sep 17 00:00:00 2001 From: Mohammed Suhail Munshi Date: Tue, 5 Dec 2023 14:27:31 +0000 Subject: Use look up table for fp16 activation - Enables FP16 lut for logistic activation - Adds LUTManager to re-use lut where appropriate. Signed-off-by: Mohammed Suhail Munshi Change-Id: I94667b63b452a8e58a1eb59cb0b5866178954523 Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/10864 Tested-by: Arm Jenkins Reviewed-by: Gunes Bayir Comments-Addressed: Arm Jenkins Benchmark: Arm Jenkins --- src/core/helpers/LUTManager.cpp | 72 ++++++++++++++++++++++++++++++++++++++++ src/core/helpers/LUTManager.h | 73 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 145 insertions(+) create mode 100644 src/core/helpers/LUTManager.cpp create mode 100644 src/core/helpers/LUTManager.h (limited to 'src/core') diff --git a/src/core/helpers/LUTManager.cpp b/src/core/helpers/LUTManager.cpp new file mode 100644 index 0000000000..2bf0098118 --- /dev/null +++ b/src/core/helpers/LUTManager.cpp @@ -0,0 +1,72 @@ +/* + * Copyright (c) 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. + */ + +#include "src/core/helpers/LUTManager.h" + +namespace arm_compute +{ +#ifdef __aarch64__ +namespace +{ +void init_lut_fp16(ActivationLayerInfo::LookupTable65536 *lut) +{ + for (uint16_t i = 0; i < lut->size() - 1; ++i) + { + const float16_t *v = reinterpret_cast(&i); + (*lut)[i] = 1.f / (1.f + std::exp(-*v)); + } + // Final value should be filled outside of loop to avoid overflows. + const uint16_t i = lut->size() - 1; + const float16_t *v = reinterpret_cast(&i); + (*lut)[i] = 1.f / (1.f + std::exp(-*v)); +} +} // namespace + +std::shared_ptr LUTManager::get_lut_table(LUTInfo info) +{ + const auto itr = map_fp16.find(info); + if (itr != map_fp16.end() && !itr->second.expired()) + { + // Found and valid + return itr->second.lock(); // Return weak ptr as shared ptr + } + else + { + // Not found, or pointer not valid + const auto ptr = std::make_shared(); + init_lut_fp16(ptr.get()); + map_fp16[info] = ptr; + return ptr; + } +} +#endif // __aarch64__ + +// Static function to get LutManager instance +LUTManager &LUTManager::get_instance() +{ + static auto inst_ = std::make_unique(); // The one, single instance. + return *inst_; +} + +} // namespace arm_compute diff --git a/src/core/helpers/LUTManager.h b/src/core/helpers/LUTManager.h new file mode 100644 index 0000000000..4e13ead7e3 --- /dev/null +++ b/src/core/helpers/LUTManager.h @@ -0,0 +1,73 @@ +/* + * Copyright (c) 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_SRC_CORE_HELPERS_LUTMANAGER_H +#define ACL_SRC_CORE_HELPERS_LUTMANAGER_H + +#include "arm_compute/core/CoreTypes.h" +#include "arm_compute/core/QuantizationInfo.h" +#include "arm_compute/function_info/ActivationLayerInfo.h" + +#include +#include + +namespace arm_compute +{ + +struct LUTInfo +{ + ActivationLayerInfo::ActivationFunction act; + DataType dt; + QuantizationInfo qinfo; + // Operators enable use of map with Lutinfo as key + friend bool operator<(const LUTInfo &l, const LUTInfo &r) + { + return (l.act < r.act) || ((l.act == r.act) && (l.dt < r.dt)) || + ((l.act == r.act) && (l.dt == r.dt) && (l.qinfo.scale() < r.qinfo.scale())) || + ((l.act == r.act) && (l.dt == r.dt) && (l.qinfo.scale() == r.qinfo.scale()) && + (l.qinfo.offset() < l.qinfo.offset())); + } + bool operator==(const LUTInfo &l) + { + return this->act == l.act && this->dt == l.dt && this->qinfo == l.qinfo; + } +}; + +/* Class to handle getting look up table */ +class LUTManager +{ +public: + LUTManager() = default; + + static LUTManager &get_instance(); +#ifdef __aarch64__ + std::shared_ptr get_lut_table(LUTInfo info); + +private: + std::map> map_fp16{}; +#endif // __aarch64__ +}; + +} // namespace arm_compute +#endif // ACL_SRC_CORE_HELPERS_LUTMANAGER_H -- cgit v1.2.1