;------------------------------------------------------------------------------ | |
; | |
; Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR> | |
; SPDX-License-Identifier: BSD-2-Clause-Patent | |
; | |
; Module Name: | |
; | |
; InterlockedCompareExchange64.Asm | |
; | |
; Abstract: | |
; | |
; InterlockedCompareExchange64 function | |
; | |
; Notes: | |
; | |
;------------------------------------------------------------------------------ | |
DEFAULT REL | |
SECTION .text | |
;------------------------------------------------------------------------------ | |
; UINT64 | |
; EFIAPI | |
; InternalSyncCompareExchange64 ( | |
; IN volatile UINT64 *Value, | |
; IN UINT64 CompareValue, | |
; IN UINT64 ExchangeValue | |
; ); | |
;------------------------------------------------------------------------------ | |
global ASM_PFX(InternalSyncCompareExchange64) | |
ASM_PFX(InternalSyncCompareExchange64): | |
mov rax, rdx | |
lock cmpxchg [rcx], r8 | |
ret | |