720d3c5fb3
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7377 6f19259b-4bc3-4df7-8a09-765794883524
48 lines
1.5 KiB
ArmAsm
48 lines
1.5 KiB
ArmAsm
#------------------------------------------------------------------------------
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#
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# Copyright (c) 2006 - 2008, Intel Corporation
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# All rights reserved. This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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# Module Name:
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#
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# InterlockedCompareExchange64.S
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#
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# Abstract:
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#
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# InternalSyncCompareExchange64 function
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#
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# Notes:
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#
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#------------------------------------------------------------------------------
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.globl ASM_PFX(InternalSyncCompareExchange64)
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#------------------------------------------------------------------------------
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# UINT64
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# EFIAPI
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# InternalSyncCompareExchange64 (
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# IN UINT64 *Value,
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# IN UINT64 CompareValue,
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# IN UINT64 ExchangeValue
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# );
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#------------------------------------------------------------------------------
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ASM_PFX(InternalSyncCompareExchange64):
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push %esi
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push %ebx
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movl 12(%esp), %esi
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movl 16(%esp), %eax
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movl 20(%esp), %edx
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movl 24(%esp), %ebx
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movl 28(%esp), %ecx
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lock
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cmpxchg8b (%esi)
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pop %ebx
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pop %esi
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ret
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