1COMMENT | -*- Mode: asm; tab-width: 8; c-basic-offset: 4 -*-
2***** BEGIN LICENSE BLOCK *****
3Version: MPL 1.1/GPL 2.0/LGPL 2.1
4
5The contents of this file are subject to the Mozilla Public License Version
61.1 (the "License"); you may not use this file except in compliance with
7the License. You may obtain a copy of the License at
8http://www.mozilla.org/MPL/
9
10Software distributed under the License is distributed on an "AS IS" basis,
11WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12for the specific language governing rights and limitations under the
13License.
14
15The Original Code is an OS/2 implementation of js_CompareAndSwap in assembly
16
17The Initial Developer of the Original Code is IBM Corporation.
18Portions created by the Initial Developer are Copyright (C) 2001
19the Initial Developer. All Rights Reserved.
20
21Contributor(s):
22
23Alternatively, the contents of this file may be used under the terms of
24either the GNU General Public License Version 2 or later (the "GPL"), or
25the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
26in which case the provisions of the GPL or the LGPL are applicable instead
27of those above. If you wish to allow use of your version of this file only
28under the terms of either the GPL or the LGPL, and not to allow others to
29use your version of this file under the terms of the MPL, indicate your
30decision by deleting the provisions above and replace them with the notice
31and other provisions required by the GPL or the LGPL. If you do not delete
32the provisions above, a recipient may use your version of this file under
33the terms of any one of the MPL, the GPL or the LGPL.
34
35***** END LICENSE BLOCK *****
36        |
37
38        .486P
39        .MODEL FLAT, OPTLINK
40        .STACK
41
42        .CODE
43
44;;;---------------------------------------------------------------------
45;;; int _Optlink js_CompareAndSwap(jsword *w, jsword ov, jsword nv)
46;;;---------------------------------------------------------------------
47js_CompareAndSwap     PROC OPTLINK EXPORT
48        push ebx
49        mov ebx, eax
50        mov eax, edx
51        mov edx, ebx
52        lock cmpxchg [ebx], ecx
53        sete al
54        and eax, 1h
55        pop ebx
56        ret
57js_CompareAndSwap     endp
58
59        END
60