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/** @file
InterlockedCompareExchange64 function
Copyright (c) 2006 - 2007, Intel Corporation<BR>
All rights reserved. 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.
**/
//
// Include common header file for this module.
//
UINT64
EFIAPI
InternalSyncCompareExchange64 (
IN UINT64 *Value,
IN UINT64 CompareValue,
IN UINT64 ExchangeValue
)
{
_asm {
mov esi, Value
mov eax, dword ptr [CompareValue + 0]
mov edx, dword ptr [CompareValue + 4]
mov ebx, dword ptr [ExchangeValue + 0]
mov ecx, dword ptr [ExchangeValue + 4]
lock cmpxchg8b qword ptr [esi]
}
}
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