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| author | David <25727384+ogniK5377@users.noreply.github.com> | 2020-06-28 01:34:07 +1000 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-06-28 01:34:07 +1000 |
| commit | 0ea4a8bcc4bca14bb7c65b248ed1899d2e7167cf (patch) | |
| tree | a83acb1e779b98d31fa54389bae4be5669573a41 /src/common/wall_clock.cpp | |
| parent | 6205965df9682c3a52adbdcf260e7b24c02b24d4 (diff) | |
| parent | 7b893c7963a57bf41f5dad7dd1709985971ce291 (diff) | |
Merge pull request #3396 from FernandoS27/prometheus-1
Implement SpinLocks, Fibers and a Host Timer
Diffstat (limited to 'src/common/wall_clock.cpp')
| -rw-r--r-- | src/common/wall_clock.cpp | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/src/common/wall_clock.cpp b/src/common/wall_clock.cpp new file mode 100644 index 0000000000..d4d35f4e7a --- /dev/null +++ b/src/common/wall_clock.cpp @@ -0,0 +1,92 @@ +// Copyright 2020 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include "common/uint128.h" +#include "common/wall_clock.h" + +#ifdef ARCHITECTURE_x86_64 +#include "common/x64/cpu_detect.h" +#include "common/x64/native_clock.h" +#endif + +namespace Common { + +using base_timer = std::chrono::steady_clock; +using base_time_point = std::chrono::time_point<base_timer>; + +class StandardWallClock : public WallClock { +public: + StandardWallClock(u64 emulated_cpu_frequency, u64 emulated_clock_frequency) + : WallClock(emulated_cpu_frequency, emulated_clock_frequency, false) { + start_time = base_timer::now(); + } + + std::chrono::nanoseconds GetTimeNS() override { + base_time_point current = base_timer::now(); + auto elapsed = current - start_time; + return std::chrono::duration_cast<std::chrono::nanoseconds>(elapsed); + } + + std::chrono::microseconds GetTimeUS() override { + base_time_point current = base_timer::now(); + auto elapsed = current - start_time; + return std::chrono::duration_cast<std::chrono::microseconds>(elapsed); + } + + std::chrono::milliseconds GetTimeMS() override { + base_time_point current = base_timer::now(); + auto elapsed = current - start_time; + return std::chrono::duration_cast<std::chrono::milliseconds>(elapsed); + } + + u64 GetClockCycles() override { + std::chrono::nanoseconds time_now = GetTimeNS(); + const u128 temporary = + Common::Multiply64Into128(time_now.count(), emulated_clock_frequency); + return Common::Divide128On32(temporary, 1000000000).first; + } + + u64 GetCPUCycles() override { + std::chrono::nanoseconds time_now = GetTimeNS(); + const u128 temporary = Common::Multiply64Into128(time_now.count(), emulated_cpu_frequency); + return Common::Divide128On32(temporary, 1000000000).first; + } + +private: + base_time_point start_time; +}; + +#ifdef ARCHITECTURE_x86_64 + +std::unique_ptr<WallClock> CreateBestMatchingClock(u32 emulated_cpu_frequency, + u32 emulated_clock_frequency) { + const auto& caps = GetCPUCaps(); + u64 rtsc_frequency = 0; + if (caps.invariant_tsc) { + if (caps.base_frequency != 0) { + rtsc_frequency = static_cast<u64>(caps.base_frequency) * 1000000U; + } + if (rtsc_frequency == 0) { + rtsc_frequency = EstimateRDTSCFrequency(); + } + } + if (rtsc_frequency == 0) { + return std::make_unique<StandardWallClock>(emulated_cpu_frequency, + emulated_clock_frequency); + } else { + return std::make_unique<X64::NativeClock>(emulated_cpu_frequency, emulated_clock_frequency, + rtsc_frequency); + } +} + +#else + +std::unique_ptr<WallClock> CreateBestMatchingClock(u32 emulated_cpu_frequency, + u32 emulated_clock_frequency) { + return std::make_unique<StandardWallClock>(emulated_cpu_frequency, emulated_clock_frequency); +} + +#endif + +} // namespace Common |