94 lines
3.1 KiB
C++
Executable File
94 lines
3.1 KiB
C++
Executable File
// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
|
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
|
|
#pragma once
|
|
|
|
#include <chrono>
|
|
#include <memory>
|
|
#include <ratio>
|
|
|
|
#include "common/common_types.h"
|
|
|
|
namespace Common {
|
|
|
|
class WallClock {
|
|
public:
|
|
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;
|
|
|
|
virtual void Reset() = 0;
|
|
|
|
/// @returns The time in nanoseconds since the construction of this clock.
|
|
virtual std::chrono::nanoseconds GetTimeNS() const = 0;
|
|
|
|
/// @returns The time in microseconds since the construction of this clock.
|
|
virtual std::chrono::microseconds GetTimeUS() const = 0;
|
|
|
|
/// @returns The time in milliseconds since the construction of this clock.
|
|
virtual std::chrono::milliseconds GetTimeMS() const = 0;
|
|
|
|
/// @returns The guest CNTPCT ticks since the construction of this clock.
|
|
virtual s64 GetCNTPCT() const = 0;
|
|
|
|
/// @returns The guest GPU ticks since the construction of this clock.
|
|
virtual s64 GetGPUTick() const = 0;
|
|
|
|
/// @returns The raw host timer ticks since an indeterminate epoch.
|
|
virtual s64 GetUptime() 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:
|
|
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>;
|
|
|
|
// Cycle Timing
|
|
|
|
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>;
|
|
};
|
|
|
|
std::unique_ptr<WallClock> CreateOptimalClock();
|
|
|
|
std::unique_ptr<WallClock> CreateStandardWallClock();
|
|
|
|
} // namespace Common
|