ArmPkg/ArmDisassemblerLib: fix check for MSR instruction

[mirror_edk2.git] / MdePkg / Library / BaseSynchronizationLib / Ia32 / InterlockedCompareExchange64.asm

;------------------------------------------------------------------------------\r
;\r
; Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>\r
; This program and the accompanying materials\r
; are licensed and made available under the terms and conditions of the BSD License\r
; which accompanies this distribution.  The full text of the license may be found at\r
; http://opensource.org/licenses/bsd-license.php.\r
;\r
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
;\r
; Module Name:\r
;\r
;   InterlockedCompareExchange64.Asm\r
;\r
; Abstract:\r
;\r
;   InterlockedCompareExchange64 function\r
;\r
; Notes:\r
;\r
;------------------------------------------------------------------------------\r
\r
    .586P\r
    .model  flat,C\r
    .code\r
\r
;------------------------------------------------------------------------------\r
; UINT64\r
; EFIAPI\r
; InternalSyncCompareExchange64 (\r
;   IN      volatile UINT64           *Value,\r
;   IN      UINT64                    CompareValue,\r
;   IN      UINT64                    ExchangeValue\r
;   );\r
;------------------------------------------------------------------------------\r
InternalSyncCompareExchange64   PROC    USES    esi ebx\r
    mov     esi, [esp + 12]\r
    mov     eax, [esp + 16]\r
    mov     edx, [esp + 20]\r
    mov     ebx, [esp + 24]\r
    mov     ecx, [esp + 28]\r
    lock    cmpxchg8b   qword ptr [esi]\r
    ret\r
InternalSyncCompareExchange64   ENDP\r
\r
    END\r