1 files changed, 41 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedCompareExchange32.nasm b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedCompareExchange32.nasm
new file mode 100644
index 0000000..4c8c810
--- /dev/null
+++ b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedCompareExchange32.nasm
@@ -0,0 +1,41 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
+; This program and the accompanying materials
+; are licensed and made available under the terms and conditions of the BSD License
+; which accompanies this distribution.  The full text of the license may be found at
+; http://opensource.org/licenses/bsd-license.php.
+;
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+;
+; Module Name:
+;
+;   InterlockedCompareExchange32.Asm
+;
+; Abstract:
+;
+;   InterlockedCompareExchange32 function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    DEFAULT REL
+    SECTION .text
+
+;------------------------------------------------------------------------------
+; UINT32
+; EFIAPI
+; InterlockedCompareExchange32 (
+;   IN      UINT32                    *Value,
+;   IN      UINT32                    CompareValue,
+;   IN      UINT32                    ExchangeValue
+;   );
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalSyncCompareExchange32)
+ASM_PFX(InternalSyncCompareExchange32):
+    mov     eax, edx
+    lock    cmpxchg [rcx], r8d
+    ret
+