VirtualBox

source: vbox/trunk/src/VBox/Runtime/common/asm/ASMAtomicCmpXchgExU64.asm@ 103795

Last change on this file since 103795 was 98103, checked in by vboxsync, 2 years ago

Copyright year updates by scm.

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1; $Id: ASMAtomicCmpXchgExU64.asm 98103 2023-01-17 14:15:46Z vboxsync $
2;; @file
3; IPRT - ASMAtomicCmpXchgExU64().
4;
5
6;
7; Copyright (C) 2006-2023 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 Exchange an unsigned 64-bit value, ordered.
46;
47; @param pu64 x86:ebp+8 gcc:rdi msc:rcx
48; @param u64New x86:ebp+c gcc:rsi msc:rdx
49; @param u64Old x86:ebp+14 gcc:rdx msc:r8
50; @param pu64Old x86:ebp+1c gcc:rcx msc:r9
51;
52; @returns bool result: true if successfully exchanged, false if not.
53; x86:al
54;
55RT_BEGINPROC ASMAtomicCmpXchgExU64
56%ifdef RT_ARCH_AMD64
57 %ifdef ASM_CALL64_MSC
58 mov rax, r8
59 lock cmpxchg [rcx], rdx
60 mov [r9], rax
61 %else
62 mov rax, rdx
63 lock cmpxchg [rdi], rsi
64 mov [rcx], rax
65 %endif
66 setz al
67 movzx eax, al
68 ret
69%endif
70%ifdef RT_ARCH_X86
71 push ebp
72 mov ebp, esp
73 push ebx
74 push edi
75
76 mov ebx, dword [ebp+0ch]
77 mov ecx, dword [ebp+0ch + 4]
78 mov edi, [ebp+08h]
79 mov eax, dword [ebp+14h]
80 mov edx, dword [ebp+14h + 4]
81 lock cmpxchg8b [edi]
82 mov edi, [ebp + 1ch]
83 mov [edi], eax
84 mov [edi + 4], edx
85 setz al
86 movzx eax, al
87
88 pop edi
89 pop ebx
90 leave
91 ret
92%endif
93ENDPROC ASMAtomicCmpXchgExU64
94
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