#------------------------------------------------------------------------------ | |
# | |
# 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: | |
# | |
# InterlockedCompareExchange32.S | |
# | |
# Abstract: | |
# | |
# InternalSyncCompareExchange32 function | |
# | |
# Notes: | |
# | |
#------------------------------------------------------------------------------ | |
ASM_GLOBAL ASM_PFX(InternalSyncCompareExchange32) | |
#------------------------------------------------------------------------------ | |
# UINT32 | |
# EFIAPI | |
# InternalSyncCompareExchange32 ( | |
# IN UINT32 *Value, | |
# IN UINT32 CompareValue, | |
# IN UINT32 ExchangeValue | |
# ); | |
#------------------------------------------------------------------------------ | |
ASM_PFX(InternalSyncCompareExchange32): | |
movl 4(%esp), %ecx | |
movl 8(%esp), %eax | |
movl 12(%esp), %edx | |
lock | |
cmpxchgl %edx, (%ecx) | |
ret |