; $Id: ASMAtomicUoOrU64.asm 82968 2020-02-04 10:35:17Z vboxsync $ ;; @file ; IPRT - ASMAtomicUoOrU64(). ; ; ; Copyright (C) 2013-2020 Oracle Corporation ; ; 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 (GPL) 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. ; ; The contents of this file may alternatively be used under the terms ; of the Common Development and Distribution License Version 1.0 ; (CDDL) only, as it comes in the "COPYING.CDDL" file of the ; VirtualBox OSE distribution, in which case the provisions of the ; CDDL are applicable instead of those of the GPL. ; ; You may elect to license modified versions of this file under the ; terms and conditions of either the GPL or the CDDL or both. ; ;******************************************************************************* ;* Header Files * ;******************************************************************************* %include "iprt/asmdefs.mac" BEGINCODE ;; ; Atomically OR an unsigned 64-bit value, unordered. ; ; @param pu64 x86:ebp+8 gcc:rdi msc:rcx ; @param u64Or x86:ebp+c gcc:rsi msc:rdx ; ; @returns void ; BEGINPROC_EXPORTED ASMAtomicUoOrU64 %ifdef RT_ARCH_AMD64 %ifdef ASM_CALL64_MSC or [rcx], rdx %else or [rdi], rsi %endif %elifdef RT_ARCH_X86 push ebp mov ebp, esp push ebx push edi mov edi, [ebp + 08h] mov ebx, [ebp + 0ch] mov ecx, [ebp + 0ch + 4] mov eax, ebx mov edx, ecx .try_again: cmpxchg8b [edi] jz .done mov ebx, eax or ebx, [ebp + 0ch] mov ecx, edx or ecx, [ebp + 0ch + 4] jmp .try_again .done: pop edi pop ebx leave %endif ret ENDPROC ASMAtomicUoOrU64