1 /* 2 * Copyright (c) 2021-2022 Arm Limited. 3 * 4 * SPDX-License-Identifier: MIT 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to 8 * deal in the Software without restriction, including without limitation the 9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 10 * sell copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in all 14 * copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22 * SOFTWARE. 23 */ 24 #ifndef ARM_COMPUTE_ICPUKERNEL_H 25 #define ARM_COMPUTE_ICPUKERNEL_H 26 27 #include "arm_compute/core/CPP/ICPPKernel.h" 28 #include "src/cpu/kernels/CpuKernelSelectionTypes.h" 29 30 namespace arm_compute 31 { 32 namespace cpu 33 { 34 enum class KernelSelectionType 35 { 36 Preferred, /**< Retrieve the best implementation available for the given Cpu ISA, ignoring the build flags */ 37 Supported /**< Retrieve the best implementation available for the given Cpu ISA that is supported by the current build */ 38 }; 39 40 template <class Derived> 41 class ICpuKernel : public ICPPKernel 42 { 43 public: 44 /** Micro-kernel selector 45 * 46 * @param[in] selector Selection struct passed including information to help pick the appropriate micro-kernel 47 * @param[in] selection_type (Optional) Decides whether to get the best implementation for the given hardware or for the given build 48 * 49 * @return A matching micro-kernel else nullptr 50 */ 51 52 template <typename SelectorType> 53 static const auto *get_implementation(const SelectorType &selector, KernelSelectionType selection_type = KernelSelectionType::Supported) 54 { 55 using kernel_type = typename std::remove_reference<decltype(Derived::get_available_kernels())>::type::value_type; 56 57 for(const auto &uk : Derived::get_available_kernels()) 58 { 59 if(uk.is_selected(selector) && (selection_type == KernelSelectionType::Preferred || uk.ukernel != nullptr)) 60 { 61 return &uk; 62 } 63 } 64 65 return static_cast<kernel_type *>(nullptr); 66 } 67 }; 68 } // namespace cpu 69 } // namespace arm_compute 70 #endif /* ARM_COMPUTE_ICPUKERNEL_H */ 71