mirror of https://github.com/acidanthera/audk.git
49 lines
1.5 KiB
NASM
49 lines
1.5 KiB
NASM
;------------------------------------------------------------------------------
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;
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; Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
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; 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.Asm
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;
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; Abstract:
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;
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; InterlockedCompareExchange64 function
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;
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; Notes:
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;
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;------------------------------------------------------------------------------
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SECTION .text
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;------------------------------------------------------------------------------
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; UINT64
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; EFIAPI
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; InternalSyncCompareExchange64 (
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; IN volatile 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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global ASM_PFX(InternalSyncCompareExchange64)
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ASM_PFX(InternalSyncCompareExchange64):
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push esi
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push ebx
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mov esi, [esp + 12]
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mov eax, [esp + 16]
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mov edx, [esp + 20]
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mov ebx, [esp + 24]
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mov ecx, [esp + 28]
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lock cmpxchg8b [esi]
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pop ebx
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pop esi
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ret
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