From 534466754f381e90f5f6475a0c02031242a5c256 Mon Sep 17 00:00:00 2001
From: Fernando Sahmkow <fsahmkow27@gmail.com>
Date: Sat, 21 Mar 2020 12:23:13 -0400
Subject: X64 Clock: Reduce accuracy to be less or equal to guest accuracy.

---
 src/common/x64/native_clock.h | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/common/x64/native_clock.h')

diff --git a/src/common/x64/native_clock.h b/src/common/x64/native_clock.h
index 3851f8fc2..e853094d2 100644
--- a/src/common/x64/native_clock.h
+++ b/src/common/x64/native_clock.h
@@ -31,6 +31,11 @@ public:
 private:
     u64 GetRTSC();
 
+    /// value used to reduce the native clocks accuracy as some apss rely on
+    /// undefined behavior where the level of accuracy in the clock shouldn't
+    /// be higher.
+    static constexpr u64 inaccuracy_mask = ~(0x100 - 1);
+
     SpinLock rtsc_serialize{};
     u64 last_measure{};
     u64 accumulated_ticks{};
-- 
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