[PATCH 5/6] include: Add __rdtsc and __rdtscp intrinsics.
Rémi Bernon
rbernon at codeweavers.com
Wed Mar 10 05:22:35 CST 2021
Signed-off-by: Rémi Bernon <rbernon at codeweavers.com>
---
include/msvcrt/intrin.h | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/include/msvcrt/intrin.h b/include/msvcrt/intrin.h
index 781c6fac823..061866fe63b 100644
--- a/include/msvcrt/intrin.h
+++ b/include/msvcrt/intrin.h
@@ -20,6 +20,36 @@ static inline void __cpuid(int info[4], int ax)
{
return __cpuidex(info, ax, 0);
}
+
+#ifdef __i386
+static inline unsigned __int64 __rdtsc(void)
+{
+ unsigned __int64 a;
+ __asm__ ("rdtsc" : "=A" (a));
+ return a;
+}
+
+static inline unsigned __int64 __rdtscp(unsigned int *aux)
+{
+ unsigned __int64 a;
+ __asm__ ("rdtscp" : "=A" (a), "=c" (*aux));
+ return a;
+}
+#elif defined __amd64
+static inline unsigned __int64 __rdtsc(void)
+{
+ unsigned __int64 a, d;
+ __asm__ ("rdtsc" : "=a" (a), "=d" (d));
+ return (d << 32) | a;
+}
+
+static inline unsigned __int64 __rdtscp(unsigned int *aux)
+{
+ unsigned __int64 a, d;
+ __asm__ ("rdtscp" : "=a" (a), "=d" (d), "=c" (*aux));
+ return (d << 32) | a;
+}
+#endif
#endif
#ifdef __aarch64__
--
2.30.0
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