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-rw-r--r--src/common/atomic_ops.h90
-rw-r--r--src/common/settings.h3
-rw-r--r--src/common/x64/native_clock.cpp10
3 files changed, 98 insertions, 5 deletions
diff --git a/src/common/atomic_ops.h b/src/common/atomic_ops.h
index b94d73c7a..69fde8421 100644
--- a/src/common/atomic_ops.h
+++ b/src/common/atomic_ops.h
@@ -46,6 +46,50 @@ namespace Common {
reinterpret_cast<__int64*>(expected.data())) != 0;
}
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u8* pointer, u8 value, u8 expected,
+ u8& actual) {
+ actual =
+ _InterlockedCompareExchange8(reinterpret_cast<volatile char*>(pointer), value, expected);
+ return actual == expected;
+}
+
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u16* pointer, u16 value, u16 expected,
+ u16& actual) {
+ actual =
+ _InterlockedCompareExchange16(reinterpret_cast<volatile short*>(pointer), value, expected);
+ return actual == expected;
+}
+
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u32* pointer, u32 value, u32 expected,
+ u32& actual) {
+ actual =
+ _InterlockedCompareExchange(reinterpret_cast<volatile long*>(pointer), value, expected);
+ return actual == expected;
+}
+
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u64* pointer, u64 value, u64 expected,
+ u64& actual) {
+ actual = _InterlockedCompareExchange64(reinterpret_cast<volatile __int64*>(pointer), value,
+ expected);
+ return actual == expected;
+}
+
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u64* pointer, u128 value, u128 expected,
+ u128& actual) {
+ const bool result =
+ _InterlockedCompareExchange128(reinterpret_cast<volatile __int64*>(pointer), value[1],
+ value[0], reinterpret_cast<__int64*>(expected.data())) != 0;
+ actual = expected;
+ return result;
+}
+
+[[nodiscard]] inline u128 AtomicLoad128(volatile u64* pointer) {
+ u128 result{};
+ _InterlockedCompareExchange128(reinterpret_cast<volatile __int64*>(pointer), result[1],
+ result[0], reinterpret_cast<__int64*>(result.data()));
+ return result;
+}
+
#else
[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u8* pointer, u8 value, u8 expected) {
@@ -72,6 +116,52 @@ namespace Common {
return __sync_bool_compare_and_swap((unsigned __int128*)pointer, expected_a, value_a);
}
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u8* pointer, u8 value, u8 expected,
+ u8& actual) {
+ actual = __sync_val_compare_and_swap(pointer, expected, value);
+ return actual == expected;
+}
+
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u16* pointer, u16 value, u16 expected,
+ u16& actual) {
+ actual = __sync_val_compare_and_swap(pointer, expected, value);
+ return actual == expected;
+}
+
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u32* pointer, u32 value, u32 expected,
+ u32& actual) {
+ actual = __sync_val_compare_and_swap(pointer, expected, value);
+ return actual == expected;
+}
+
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u64* pointer, u64 value, u64 expected,
+ u64& actual) {
+ actual = __sync_val_compare_and_swap(pointer, expected, value);
+ return actual == expected;
+}
+
+[[nodiscard]] inline bool AtomicCompareAndSwap(volatile u64* pointer, u128 value, u128 expected,
+ u128& actual) {
+ unsigned __int128 value_a;
+ unsigned __int128 expected_a;
+ unsigned __int128 actual_a;
+ std::memcpy(&value_a, value.data(), sizeof(u128));
+ std::memcpy(&expected_a, expected.data(), sizeof(u128));
+ actual_a = __sync_val_compare_and_swap((unsigned __int128*)pointer, expected_a, value_a);
+ std::memcpy(actual.data(), &actual_a, sizeof(u128));
+ return actual_a == expected_a;
+}
+
+[[nodiscard]] inline u128 AtomicLoad128(volatile u64* pointer) {
+ unsigned __int128 zeros_a = 0;
+ unsigned __int128 result_a =
+ __sync_val_compare_and_swap((unsigned __int128*)pointer, zeros_a, zeros_a);
+
+ u128 result;
+ std::memcpy(result.data(), &result_a, sizeof(u128));
+ return result;
+}
+
#endif
} // namespace Common
diff --git a/src/common/settings.h b/src/common/settings.h
index a37d83fb3..86e0fa140 100644
--- a/src/common/settings.h
+++ b/src/common/settings.h
@@ -38,6 +38,7 @@ enum class CPUAccuracy : u32 {
Auto = 0,
Accurate = 1,
Unsafe = 2,
+ Paranoid = 3,
};
enum class FullscreenMode : u32 {
@@ -470,7 +471,7 @@ struct Values {
// Cpu
RangedSetting<CPUAccuracy> cpu_accuracy{CPUAccuracy::Auto, CPUAccuracy::Auto,
- CPUAccuracy::Unsafe, "cpu_accuracy"};
+ CPUAccuracy::Paranoid, "cpu_accuracy"};
// TODO: remove cpu_accuracy_first_time, migration setting added 8 July 2021
BasicSetting<bool> cpu_accuracy_first_time{true, "cpu_accuracy_first_time"};
BasicSetting<bool> cpu_debug_mode{false, "cpu_debug_mode"};
diff --git a/src/common/x64/native_clock.cpp b/src/common/x64/native_clock.cpp
index 347e41efc..7a3f21dcf 100644
--- a/src/common/x64/native_clock.cpp
+++ b/src/common/x64/native_clock.cpp
@@ -55,8 +55,9 @@ NativeClock::NativeClock(u64 emulated_cpu_frequency_, u64 emulated_clock_frequen
u64 NativeClock::GetRTSC() {
TimePoint new_time_point{};
TimePoint current_time_point{};
+
+ current_time_point.pack = Common::AtomicLoad128(time_point.pack.data());
do {
- current_time_point.pack = time_point.pack;
_mm_mfence();
const u64 current_measure = __rdtsc();
u64 diff = current_measure - current_time_point.inner.last_measure;
@@ -66,7 +67,7 @@ u64 NativeClock::GetRTSC() {
: current_time_point.inner.last_measure;
new_time_point.inner.accumulated_ticks = current_time_point.inner.accumulated_ticks + diff;
} while (!Common::AtomicCompareAndSwap(time_point.pack.data(), new_time_point.pack,
- current_time_point.pack));
+ current_time_point.pack, current_time_point.pack));
/// The clock cannot be more precise than the guest timer, remove the lower bits
return new_time_point.inner.accumulated_ticks & inaccuracy_mask;
}
@@ -75,13 +76,14 @@ void NativeClock::Pause(bool is_paused) {
if (!is_paused) {
TimePoint current_time_point{};
TimePoint new_time_point{};
+
+ current_time_point.pack = Common::AtomicLoad128(time_point.pack.data());
do {
- current_time_point.pack = time_point.pack;
new_time_point.pack = current_time_point.pack;
_mm_mfence();
new_time_point.inner.last_measure = __rdtsc();
} while (!Common::AtomicCompareAndSwap(time_point.pack.data(), new_time_point.pack,
- current_time_point.pack));
+ current_time_point.pack, current_time_point.pack));
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 07:46:44 +0100