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#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2008, Intel Corporation
# 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.
#
# Module Name:
#
# InterlockedCompareExchange64.S
#
# Abstract:
#
# InterlockedCompareExchange64 function
#
# Notes:
#
#------------------------------------------------------------------------------
#------------------------------------------------------------------------------
# UINT64
# EFIAPI
# InterlockedCompareExchange64 (
# IN UINT64 *Value,
# IN UINT64 CompareValue,
# IN UINT64 ExchangeValue
# );
#------------------------------------------------------------------------------
ASM_GLOBAL ASM_PFX(InternalSyncCompareExchange64)
.align 16
ASM_PFX(InternalSyncCompareExchange64):
mov %rdx, %rax
lock cmpxchg %r8,(%rcx)
ret
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