mirror of
https://github.com/azahar-emu/dynarmic
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108 lines
3.0 KiB
C++
108 lines
3.0 KiB
C++
// SPDX-FileCopyrightText: Copyright (c) 2023 merryhime <https://mary.rs>
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// SPDX-License-Identifier: MIT
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#pragma once
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#include <bitset>
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#include <cstddef>
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#include <initializer_list>
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#if defined(__cpp_lib_constexpr_bitset) && __cpp_lib_constexpr_bitset >= 202207L
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# define OAKNUT_CPU_FEATURES_CONSTEXPR constexpr
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#else
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# define OAKNUT_CPU_FEATURES_CONSTEXPR
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#endif
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namespace oaknut {
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// NOTE: This file contains code that can be compiled on non-arm64 systems.
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// For run-time CPU feature detection, include feature_detection.hpp
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enum class CpuFeature {
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#define OAKNUT_CPU_FEATURE(name) name,
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#include "oaknut/impl/cpu_feature.inc.hpp"
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#undef OAKNUT_CPU_FEATURE
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};
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constexpr std::size_t cpu_feature_count = 0
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#define OAKNUT_CPU_FEATURE(name) +1
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#include "oaknut/impl/cpu_feature.inc.hpp"
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#undef OAKNUT_CPU_FEATURE
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;
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class CpuFeatures final {
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public:
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constexpr CpuFeatures() = default;
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OAKNUT_CPU_FEATURES_CONSTEXPR explicit CpuFeatures(std::initializer_list<CpuFeature> features)
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{
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for (CpuFeature f : features) {
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m_bitset.set(static_cast<std::size_t>(f));
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}
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}
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constexpr bool has(CpuFeature feature) const
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{
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if (static_cast<std::size_t>(feature) >= cpu_feature_count)
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return false;
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return m_bitset[static_cast<std::size_t>(feature)];
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}
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OAKNUT_CPU_FEATURES_CONSTEXPR CpuFeatures& operator&=(const CpuFeatures& other) noexcept
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{
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m_bitset &= other.m_bitset;
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return *this;
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}
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OAKNUT_CPU_FEATURES_CONSTEXPR CpuFeatures& operator|=(const CpuFeatures& other) noexcept
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{
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m_bitset |= other.m_bitset;
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return *this;
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}
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OAKNUT_CPU_FEATURES_CONSTEXPR CpuFeatures& operator^=(const CpuFeatures& other) noexcept
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{
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m_bitset ^= other.m_bitset;
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return *this;
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}
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OAKNUT_CPU_FEATURES_CONSTEXPR CpuFeatures operator~() const noexcept
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{
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CpuFeatures result;
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result.m_bitset = ~m_bitset;
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return result;
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}
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private:
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using bitset = std::bitset<cpu_feature_count>;
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friend OAKNUT_CPU_FEATURES_CONSTEXPR CpuFeatures operator&(const CpuFeatures& a, const CpuFeatures& b) noexcept;
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friend OAKNUT_CPU_FEATURES_CONSTEXPR CpuFeatures operator|(const CpuFeatures& a, const CpuFeatures& b) noexcept;
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friend OAKNUT_CPU_FEATURES_CONSTEXPR CpuFeatures operator^(const CpuFeatures& a, const CpuFeatures& b) noexcept;
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bitset m_bitset;
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};
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OAKNUT_CPU_FEATURES_CONSTEXPR CpuFeatures operator&(const CpuFeatures& a, const CpuFeatures& b) noexcept
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{
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CpuFeatures result;
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result.m_bitset = a.m_bitset & b.m_bitset;
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return result;
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}
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OAKNUT_CPU_FEATURES_CONSTEXPR CpuFeatures operator|(const CpuFeatures& a, const CpuFeatures& b) noexcept
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{
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CpuFeatures result;
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result.m_bitset = a.m_bitset | b.m_bitset;
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return result;
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}
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OAKNUT_CPU_FEATURES_CONSTEXPR CpuFeatures operator^(const CpuFeatures& a, const CpuFeatures& b) noexcept
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{
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CpuFeatures result;
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result.m_bitset = a.m_bitset ^ b.m_bitset;
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return result;
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}
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} // namespace oaknut
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