From f215e02bf85f68d3a6106c2a1f4f7f063f819064 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:17:27 +0200 Subject: Adding upstream version 7.0.14-dfsg. Signed-off-by: Daniel Baumann --- src/VBox/Runtime/common/asm/ASMAtomicXchgU64.asm | 80 ++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 src/VBox/Runtime/common/asm/ASMAtomicXchgU64.asm (limited to 'src/VBox/Runtime/common/asm/ASMAtomicXchgU64.asm') diff --git a/src/VBox/Runtime/common/asm/ASMAtomicXchgU64.asm b/src/VBox/Runtime/common/asm/ASMAtomicXchgU64.asm new file mode 100644 index 00000000..a137d351 --- /dev/null +++ b/src/VBox/Runtime/common/asm/ASMAtomicXchgU64.asm @@ -0,0 +1,80 @@ +; $Id: ASMAtomicXchgU64.asm $ +;; @file +; IPRT - ASMAtomicXchgU64(). +; + +; +; Copyright (C) 2006-2023 Oracle and/or its affiliates. +; +; This file is part of VirtualBox base platform packages, as +; available from https://www.virtualbox.org. +; +; This program 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 3 of the +; License. +; +; This program is distributed in the hope that it will be useful, but +; WITHOUT ANY WARRANTY; without even the implied warranty of +; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +; General Public License for more details. +; +; You should have received a copy of the GNU General Public License +; along with this program; if not, see . +; +; The contents of this file may alternatively be used under the terms +; of the Common Development and Distribution License Version 1.0 +; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included +; in the VirtualBox 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. +; +; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 +; + +;******************************************************************************* +;* Header Files * +;******************************************************************************* +%include "iprt/asmdefs.mac" + +BEGINCODE + +;; +; Atomically Exchange an unsigned 64-bit value, ordered. +; +; @param pu64 x86:ebp+8 gcc:rdi msc:rcx +; @param u64New x86:ebp+c gcc:rsi msc:rdx +; +; @returns Current (i.e. old) *pu64 value (x86:eax:edx, 64-bit: rax) +; +RT_BEGINPROC ASMAtomicXchgU64 +%ifdef RT_ARCH_AMD64 + %ifdef ASM_CALL64_MSC + xchg [rcx], rdx + %else + xchg [rdi], rsi + %endif + ret +%endif +%ifdef RT_ARCH_X86 + push ebp + mov ebp, esp + push ebx + push edi + +.try_again: + mov ebx, dword [ebp+0ch] + mov ecx, dword [ebp+0ch + 4] + mov edi, [ebp+08h] + lock cmpxchg8b [edi] + jnz .try_again + + pop edi + pop ebx + leave + ret +%endif +ENDPROC ASMAtomicXchgU64 + -- cgit v1.2.3