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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:49:04 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:49:04 +0000 |
commit | 16f504a9dca3fe3b70568f67b7d41241ae485288 (patch) | |
tree | c60f36ada0496ba928b7161059ba5ab1ab224f9d /src/VBox/Runtime/common/asm/ASMAtomicCmpXchgU16.asm | |
parent | Initial commit. (diff) | |
download | virtualbox-upstream.tar.xz virtualbox-upstream.zip |
Adding upstream version 7.0.6-dfsg.upstream/7.0.6-dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/Runtime/common/asm/ASMAtomicCmpXchgU16.asm')
-rw-r--r-- | src/VBox/Runtime/common/asm/ASMAtomicCmpXchgU16.asm | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/asm/ASMAtomicCmpXchgU16.asm b/src/VBox/Runtime/common/asm/ASMAtomicCmpXchgU16.asm new file mode 100644 index 00000000..f88de033 --- /dev/null +++ b/src/VBox/Runtime/common/asm/ASMAtomicCmpXchgU16.asm @@ -0,0 +1,73 @@ +; $Id: ASMAtomicCmpXchgU16.asm $ +;; @file +; IPRT - ASMAtomicCmpXchgU16(). +; + +; +; Copyright (C) 2006-2022 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 <https://www.gnu.org/licenses>. +; +; 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 compares and exchanges an unsigned 8-bit int. +; +; @param pu16 x86:esp+4 msc:rcx gcc:rdi +; @param u16New x86:esp+8 msc:dx gcc:si +; @param u16Old x86:esp+c msc:r8l gcc:dl +; +; @returns bool result: true if successfully exchanged, false if not. +; x86:al +; +RT_BEGINPROC ASMAtomicCmpXchgU16 +%ifdef RT_ARCH_AMD64 + %ifdef ASM_CALL64_MSC + mov ax, r8w + lock cmpxchg [rcx], dx + %else + mov ax, dx + lock cmpxchg [rdi], si + %endif +%else + mov ecx, [esp + 04h] + mov dx, [esp + 08h] + mov ax, [esp + 0ch] + lock cmpxchg [ecx], dx +%endif + setz al + movzx eax, al + ret +ENDPROC ASMAtomicCmpXchgU16 + |