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-rw-r--r--src/common/wall_clock.cpp17
1 files changed, 9 insertions, 8 deletions
diff --git a/src/common/wall_clock.cpp b/src/common/wall_clock.cpp
index a8c143f85..1545993bd 100644
--- a/src/common/wall_clock.cpp
+++ b/src/common/wall_clock.cpp
@@ -2,6 +2,8 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
+#include <cstdint>
+
#include "common/uint128.h"
#include "common/wall_clock.h"
@@ -18,7 +20,9 @@ using base_time_point = std::chrono::time_point<base_timer>;
class StandardWallClock final : public WallClock {
public:
explicit StandardWallClock(u64 emulated_cpu_frequency_, u64 emulated_clock_frequency_)
- : WallClock(emulated_cpu_frequency_, emulated_clock_frequency_, false) {
+ : WallClock(emulated_cpu_frequency_, emulated_clock_frequency_, false),
+ emulated_clock_factor{GetFixedPoint64Factor(emulated_clock_frequency, 1000000000)},
+ emulated_cpu_factor{GetFixedPoint64Factor(emulated_cpu_frequency, 1000000000)} {
start_time = base_timer::now();
}
@@ -41,16 +45,11 @@ public:
}
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;
+ return MultiplyHigh(GetTimeNS().count(), emulated_clock_factor);
}
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;
+ return MultiplyHigh(GetTimeNS().count(), emulated_cpu_factor);
}
void Pause([[maybe_unused]] bool is_paused) override {
@@ -59,6 +58,8 @@ public:
private:
base_time_point start_time;
+ const u64 emulated_clock_factor;
+ const u64 emulated_cpu_factor;
};
#ifdef ARCHITECTURE_x86_64