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/*
* Copyright (c) 2021-2022 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_ICPUKERNEL_H
#define ARM_COMPUTE_ICPUKERNEL_H
#include "arm_compute/core/CPP/ICPPKernel.h"
#include "src/cpu/kernels/CpuKernelSelectionTypes.h"
namespace arm_compute
{
namespace cpu
{
enum class KernelSelectionType
{
Preferred, /**< Retrieve the best implementation available for the given Cpu ISA, ignoring the build flags */
Supported /**< Retrieve the best implementation available for the given Cpu ISA that is supported by the current build */
};
template <class Derived>
class ICpuKernel : public ICPPKernel
{
public:
/** Micro-kernel selector
*
* @param[in] selector Selection struct passed including information to help pick the appropriate micro-kernel
* @param[in] selection_type (Optional) Decides whether to get the best implementation for the given hardware or for the given build
*
* @return A matching micro-kernel else nullptr
*/
template <typename SelectorType>
static const auto *get_implementation(const SelectorType &selector,
KernelSelectionType selection_type = KernelSelectionType::Supported)
{
using kernel_type =
typename std::remove_reference<decltype(Derived::get_available_kernels())>::type::value_type;
for (const auto &uk : Derived::get_available_kernels())
{
if (uk.is_selected(selector) && (selection_type == KernelSelectionType::Preferred || uk.ukernel != nullptr))
{
return &uk;
}
}
return static_cast<kernel_type *>(nullptr);
}
};
} // namespace cpu
} // namespace arm_compute
#endif /* ARM_COMPUTE_ICPUKERNEL_H */
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