(wall, native)_clock: Add GetGPUTick

Allows us to directly calculate the GPU tick without double conversion to and from the host clock tick.

2 files changed, 9 insertions, 1 deletions

diff --git a/src/common/x64/native_clock.cpp b/src/common/x64/native_clock.cpp
index 5d1eb0590..7d2a26bd9 100644
--- a/src/common/x64/native_clock.cpp
+++ b/src/common/x64/native_clock.cpp
@@ -12,7 +12,8 @@ NativeClock::NativeClock(u64 rdtsc_frequency_)
       ns_rdtsc_factor{GetFixedPoint64Factor(NsRatio::den, rdtsc_frequency)},
       us_rdtsc_factor{GetFixedPoint64Factor(UsRatio::den, rdtsc_frequency)},
       ms_rdtsc_factor{GetFixedPoint64Factor(MsRatio::den, rdtsc_frequency)},
-      cntpct_rdtsc_factor{GetFixedPoint64Factor(CNTFRQ, rdtsc_frequency)} {}
+      cntpct_rdtsc_factor{GetFixedPoint64Factor(CNTFRQ, rdtsc_frequency)},
+      gputick_rdtsc_factor{GetFixedPoint64Factor(GPUTickFreq, rdtsc_frequency)} {}
 
 std::chrono::nanoseconds NativeClock::GetTimeNS() const {
     return std::chrono::nanoseconds{MultiplyHigh(GetHostTicksElapsed(), ns_rdtsc_factor)};
@@ -30,6 +31,10 @@ u64 NativeClock::GetCNTPCT() const {
     return MultiplyHigh(GetHostTicksElapsed(), cntpct_rdtsc_factor);
 }
 
+u64 NativeClock::GetGPUTick() const {
+    return MultiplyHigh(GetHostTicksElapsed(), gputick_rdtsc_factor);
+}
+
 u64 NativeClock::GetHostTicksNow() const {
     return FencedRDTSC();
 }
diff --git a/src/common/x64/native_clock.h b/src/common/x64/native_clock.h
index d6f8626c1..334415eff 100644
--- a/src/common/x64/native_clock.h
+++ b/src/common/x64/native_clock.h
@@ -19,6 +19,8 @@ public:
 
     u64 GetCNTPCT() const override;
 
+    u64 GetGPUTick() const override;
+
     u64 GetHostTicksNow() const override;
 
     u64 GetHostTicksElapsed() const override;
@@ -33,6 +35,7 @@ private:
     u64 us_rdtsc_factor;
     u64 ms_rdtsc_factor;
     u64 cntpct_rdtsc_factor;
+    u64 gputick_rdtsc_factor;
 };
 
 } // namespace Common::X64