;; @file
; InnoTek Portable Runtime - ASMAtomicReadU64().
;

;
; Copyright (C) 2006 InnoTek Systemberatung GmbH
;
; This file is part of VirtualBox Open Source Edition (OSE), as
; available from http://www.virtualbox.org. This file is free software;
; you can redistribute it and/or modify it under the terms of the GNU
; General Public License as published by the Free Software Foundation,
; in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
; distribution. VirtualBox OSE is distributed in the hope that it will
; be useful, but WITHOUT ANY WARRANTY of any kind.
;
; If you received this file as part of a commercial VirtualBox
; distribution, then only the terms of your commercial VirtualBox
; license agreement apply instead of the previous paragraph.
;


;*******************************************************************************
;* Header Files                                                                *
;*******************************************************************************
%include "iprt/asmdefs.mac"

BEGINCODE

;;
; Atomically Reads a unsigned 64-bit value.
;
; @returns rax  Current *pu64 value
; @param   rcx  pu64    Pointer to the 64-bit variable to read.
;                  The memory pointed to must be writable.
;
BEGINPROC_EXPORTED ASMAtomicReadU64
        mov     rax, [rcx]
        ret
ENDPROC ASMAtomicReadU64

