diff options
Diffstat (limited to '')
-rw-r--r-- | src/common/wall_clock.h | 88 |
1 files changed, 62 insertions, 26 deletions
diff --git a/src/common/wall_clock.h b/src/common/wall_clock.h index 828a523a8..f45d3d8c5 100644 --- a/src/common/wall_clock.h +++ b/src/common/wall_clock.h @@ -5,6 +5,7 @@ #include <chrono> #include <memory> +#include <ratio> #include "common/common_types.h" @@ -12,47 +13,82 @@ namespace Common { class WallClock { public: - static constexpr u64 NS_RATIO = 1'000'000'000; - static constexpr u64 US_RATIO = 1'000'000; - static constexpr u64 MS_RATIO = 1'000; + static constexpr u64 CNTFRQ = 19'200'000; // CNTPCT_EL0 Frequency = 19.2 MHz + static constexpr u64 GPUTickFreq = 614'400'000; // GM20B GPU Tick Frequency = 614.4 MHz + static constexpr u64 CPUTickFreq = 1'020'000'000; // T210/4 A57 CPU Tick Frequency = 1020.0 MHz virtual ~WallClock() = default; - /// Returns current wall time in nanoseconds - [[nodiscard]] virtual std::chrono::nanoseconds GetTimeNS() = 0; + /// @returns The time in nanoseconds since the construction of this clock. + virtual std::chrono::nanoseconds GetTimeNS() const = 0; - /// Returns current wall time in microseconds - [[nodiscard]] virtual std::chrono::microseconds GetTimeUS() = 0; + /// @returns The time in microseconds since the construction of this clock. + virtual std::chrono::microseconds GetTimeUS() const = 0; - /// Returns current wall time in milliseconds - [[nodiscard]] virtual std::chrono::milliseconds GetTimeMS() = 0; + /// @returns The time in milliseconds since the construction of this clock. + virtual std::chrono::milliseconds GetTimeMS() const = 0; - /// Returns current wall time in emulated clock cycles - [[nodiscard]] virtual u64 GetClockCycles() = 0; + /// @returns The guest CNTPCT ticks since the construction of this clock. + virtual u64 GetCNTPCT() const = 0; - /// Returns current wall time in emulated cpu cycles - [[nodiscard]] virtual u64 GetCPUCycles() = 0; + /// @returns The guest GPU ticks since the construction of this clock. + virtual u64 GetGPUTick() const = 0; - virtual void Pause(bool is_paused) = 0; + /// @returns The raw host timer ticks since an indeterminate epoch. + virtual u64 GetHostTicksNow() const = 0; - /// Tells if the wall clock, uses the host CPU's hardware clock - [[nodiscard]] bool IsNative() const { - return is_native; + /// @returns The raw host timer ticks since the construction of this clock. + virtual u64 GetHostTicksElapsed() const = 0; + + /// @returns Whether the clock directly uses the host's hardware clock. + virtual bool IsNative() const = 0; + + static inline u64 NSToCNTPCT(u64 ns) { + return ns * NsToCNTPCTRatio::num / NsToCNTPCTRatio::den; + } + + static inline u64 NSToGPUTick(u64 ns) { + return ns * NsToGPUTickRatio::num / NsToGPUTickRatio::den; + } + + // Cycle Timing + + static inline u64 CPUTickToNS(u64 cpu_tick) { + return cpu_tick * CPUTickToNsRatio::num / CPUTickToNsRatio::den; + } + + static inline u64 CPUTickToUS(u64 cpu_tick) { + return cpu_tick * CPUTickToUsRatio::num / CPUTickToUsRatio::den; + } + + static inline u64 CPUTickToCNTPCT(u64 cpu_tick) { + return cpu_tick * CPUTickToCNTPCTRatio::num / CPUTickToCNTPCTRatio::den; + } + + static inline u64 CPUTickToGPUTick(u64 cpu_tick) { + return cpu_tick * CPUTickToGPUTickRatio::num / CPUTickToGPUTickRatio::den; } protected: - explicit WallClock(u64 emulated_cpu_frequency_, u64 emulated_clock_frequency_, bool is_native_) - : emulated_cpu_frequency{emulated_cpu_frequency_}, - emulated_clock_frequency{emulated_clock_frequency_}, is_native{is_native_} {} + using NsRatio = std::nano; + using UsRatio = std::micro; + using MsRatio = std::milli; + + using NsToUsRatio = std::ratio_divide<std::nano, std::micro>; + using NsToMsRatio = std::ratio_divide<std::nano, std::milli>; + using NsToCNTPCTRatio = std::ratio<CNTFRQ, std::nano::den>; + using NsToGPUTickRatio = std::ratio<GPUTickFreq, std::nano::den>; - u64 emulated_cpu_frequency; - u64 emulated_clock_frequency; + // Cycle Timing -private: - bool is_native; + using CPUTickToNsRatio = std::ratio<std::nano::den, CPUTickFreq>; + using CPUTickToUsRatio = std::ratio<std::micro::den, CPUTickFreq>; + using CPUTickToCNTPCTRatio = std::ratio<CNTFRQ, CPUTickFreq>; + using CPUTickToGPUTickRatio = std::ratio<GPUTickFreq, CPUTickFreq>; }; -[[nodiscard]] std::unique_ptr<WallClock> CreateBestMatchingClock(u64 emulated_cpu_frequency, - u64 emulated_clock_frequency); +std::unique_ptr<WallClock> CreateOptimalClock(); + +std::unique_ptr<WallClock> CreateStandardWallClock(); } // namespace Common |