diff options
Diffstat (limited to 'Core/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange64.nasm')
-rw-r--r-- | Core/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange64.nasm | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange64.nasm b/Core/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange64.nasm new file mode 100644 index 0000000000..c5c3e12459 --- /dev/null +++ b/Core/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange64.nasm @@ -0,0 +1,48 @@ +;------------------------------------------------------------------------------
+;
+; 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:
+;
+; InterlockedCompareExchange64.Asm
+;
+; Abstract:
+;
+; InterlockedCompareExchange64 function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+ SECTION .text
+
+;------------------------------------------------------------------------------
+; UINT64
+; EFIAPI
+; InternalSyncCompareExchange64 (
+; IN volatile UINT64 *Value,
+; IN UINT64 CompareValue,
+; IN UINT64 ExchangeValue
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalSyncCompareExchange64)
+ASM_PFX(InternalSyncCompareExchange64):
+ push esi
+ push ebx
+ mov esi, [esp + 12]
+ mov eax, [esp + 16]
+ mov edx, [esp + 20]
+ mov ebx, [esp + 24]
+ mov ecx, [esp + 28]
+ lock cmpxchg8b [esi]
+ pop ebx
+ pop esi
+ ret
+
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