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-rw-r--r--MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange64.nasm2
1 files changed, 1 insertions, 1 deletions
diff --git a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange64.nasm b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange64.nasm
index ee63ff7f12..206de407ae 100644
--- a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange64.nasm
+++ b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange64.nasm
@@ -41,7 +41,7 @@ ASM_PFX(InternalSyncCompareExchange64):
mov edx, [esp + 20]
mov ebx, [esp + 24]
mov ecx, [esp + 28]
- lock cmpxchg8b qword [esi]
+ lock cmpxchg8b [esi]
pop ebx
pop esi
ret