VirtualBox

source: vbox/trunk/src/VBox/Runtime/common/asm/ASMAtomicUoOrU64.asm@ 103795

Last change on this file since 103795 was 98103, checked in by vboxsync, 23 months ago

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1; $Id: ASMAtomicUoOrU64.asm 98103 2023-01-17 14:15:46Z vboxsync $
2;; @file
3; IPRT - ASMAtomicUoOrU64().
4;
5
6;
7; Copyright (C) 2013-2023 Oracle and/or its affiliates.
8;
9; This file is part of VirtualBox base platform packages, as
10; available from https://www.virtualbox.org.
11;
12; This program is free software; you can redistribute it and/or
13; modify it under the terms of the GNU General Public License
14; as published by the Free Software Foundation, in version 3 of the
15; License.
16;
17; This program is distributed in the hope that it will be useful, but
18; WITHOUT ANY WARRANTY; without even the implied warranty of
19; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20; General Public License for more details.
21;
22; You should have received a copy of the GNU General Public License
23; along with this program; if not, see <https://www.gnu.org/licenses>.
24;
25; The contents of this file may alternatively be used under the terms
26; of the Common Development and Distribution License Version 1.0
27; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28; in the VirtualBox distribution, in which case the provisions of the
29; CDDL are applicable instead of those of the GPL.
30;
31; You may elect to license modified versions of this file under the
32; terms and conditions of either the GPL or the CDDL or both.
33;
34; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35;
36
37;*******************************************************************************
38;* Header Files *
39;*******************************************************************************
40%include "iprt/asmdefs.mac"
41
42BEGINCODE
43
44;;
45; Atomically OR an unsigned 64-bit value, unordered.
46;
47; @param pu64 x86:ebp+8 gcc:rdi msc:rcx
48; @param u64Or x86:ebp+c gcc:rsi msc:rdx
49;
50; @returns void
51;
52RT_BEGINPROC ASMAtomicUoOrU64
53%ifdef RT_ARCH_AMD64
54 %ifdef ASM_CALL64_MSC
55 or [rcx], rdx
56 %else
57 or [rdi], rsi
58 %endif
59%elifdef RT_ARCH_X86
60 push ebp
61 mov ebp, esp
62 push ebx
63 push edi
64
65 mov edi, [ebp + 08h]
66 mov ebx, [ebp + 0ch]
67 mov ecx, [ebp + 0ch + 4]
68 mov eax, ebx
69 mov edx, ecx
70.try_again:
71 cmpxchg8b [edi]
72 jz .done
73 mov ebx, eax
74 or ebx, [ebp + 0ch]
75 mov ecx, edx
76 or ecx, [ebp + 0ch + 4]
77 jmp .try_again
78
79.done:
80 pop edi
81 pop ebx
82 leave
83%endif
84 ret
85ENDPROC ASMAtomicUoOrU64
86
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