diff options
Diffstat (limited to 'Core/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange32.asm')
-rw-r--r-- | Core/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange32.asm | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange32.asm b/Core/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange32.asm new file mode 100644 index 0000000000..1a4a611cc9 --- /dev/null +++ b/Core/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange32.asm @@ -0,0 +1,45 @@ +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006 - 2016, 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:
+;
+;------------------------------------------------------------------------------
+
+ .486
+ .model flat,C
+ .code
+
+;------------------------------------------------------------------------------
+; UINT32
+; EFIAPI
+; InternalSyncCompareExchange32 (
+; IN volatile UINT32 *Value,
+; IN UINT32 CompareValue,
+; IN UINT32 ExchangeValue
+; );
+;------------------------------------------------------------------------------
+InternalSyncCompareExchange32 PROC
+ mov ecx, [esp + 4]
+ mov eax, [esp + 8]
+ mov edx, [esp + 12]
+ lock cmpxchg [ecx], edx
+ ret
+InternalSyncCompareExchange32 ENDP
+
+ END
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