// Copyright 2020 yuzu Emulator Project // Licensed under GPLv2 or any later version // Refer to the license.txt file included. #pragma once #include <optional> #include "common/wall_clock.h" namespace Common { namespace X64 { class NativeClock final : public WallClock { public: explicit NativeClock(u64 emulated_cpu_frequency_, u64 emulated_clock_frequency_, u64 rtsc_frequency_); std::chrono::nanoseconds GetTimeNS() override; std::chrono::microseconds GetTimeUS() override; std::chrono::milliseconds GetTimeMS() override; u64 GetClockCycles() override; u64 GetCPUCycles() override; void Pause(bool is_paused) override; private: u64 GetRTSC(); union alignas(16) TimePoint { TimePoint() : pack{} {} u128 pack{}; struct Inner { u64 last_measure{}; u64 accumulated_ticks{}; } inner; }; /// value used to reduce the native clocks accuracy as some apss rely on /// undefined behavior where the level of accuracy in the clock shouldn't /// be higher. static constexpr u64 inaccuracy_mask = ~(UINT64_C(0x400) - 1); TimePoint time_point; // factors u64 clock_rtsc_factor{}; u64 cpu_rtsc_factor{}; u64 ns_rtsc_factor{}; u64 us_rtsc_factor{}; u64 ms_rtsc_factor{}; u64 rtsc_frequency; }; } // namespace X64 u64 EstimateRDTSCFrequency(); } // namespace Common