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authorMorph <39850852+Morph1984@users.noreply.github.com>2023-03-22 21:40:41 +0100
committerMorph <39850852+Morph1984@users.noreply.github.com>2023-03-27 23:45:22 +0200
commit981bc8aa1c924eabc55f63f9671324c548c72d59 (patch)
treefb41c166e32bf99e2dd0f96ec92e4b59fed8ce9c /src/common/x64/cpu_wait.cpp
parentcore_timing: Make use of MicroSleep for x64 CPUs (diff)
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Diffstat (limited to '')
-rw-r--r--src/common/x64/cpu_wait.cpp13
1 files changed, 5 insertions, 8 deletions
diff --git a/src/common/x64/cpu_wait.cpp b/src/common/x64/cpu_wait.cpp
index 1fab0bfe8..cfeef6a3d 100644
--- a/src/common/x64/cpu_wait.cpp
+++ b/src/common/x64/cpu_wait.cpp
@@ -33,16 +33,13 @@ __forceinline static void TPAUSE() {
}
#else
static u64 FencedRDTSC() {
- u64 result;
+ u64 eax;
+ u64 edx;
asm volatile("lfence\n\t"
"rdtsc\n\t"
- "shl $32, %%rdx\n\t"
- "or %%rdx, %0\n\t"
- "lfence"
- : "=a"(result)
- :
- : "rdx", "memory", "cc");
- return result;
+ "lfence\n\t"
+ : "=a"(eax), "=d"(edx));
+ return (edx << 32) | eax;
}
static void TPAUSE() {