91 lines
3 KiB
C++
91 lines
3 KiB
C++
// 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 final : 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;
|
|
}
|
|
|
|
void Pause([[maybe_unused]] bool is_paused) override {
|
|
// Do nothing in this clock type.
|
|
}
|
|
|
|
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) {
|
|
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
|