COMMENT | -*- Mode: asm; tab-width: 8; c-basic-offset: 4 -*-
***** BEGIN LICENSE BLOCK *****
Version: MPL 1.1/GPL 2.0/LGPL 2.1

The contents of this file are subject to the Mozilla Public License Version 
1.1 (the "License"); you may not use this file except in compliance with 
the License. You may obtain a copy of the License at 
http://www.mozilla.org/MPL/

Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
for the specific language governing rights and limitations under the
License.

The Original Code is an OS/2 implementation of js_CompareAndSwap in assembly

The Initial Developer of the Original Code is IBM Corporation.
Portions created by the Initial Developer are Copyright (C) 2001
the Initial Developer. All Rights Reserved.

Contributor(s):

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***** END LICENSE BLOCK *****
        |

        .486P
        .MODEL FLAT, OPTLINK
        .STACK

        .CODE

;;;---------------------------------------------------------------------
;;; int _Optlink js_CompareAndSwap(jsword *w, jsword ov, jsword nv)
;;;---------------------------------------------------------------------
js_CompareAndSwap     PROC OPTLINK EXPORT
        push ebx
        mov ebx, eax
        mov eax, edx
        mov edx, ebx
        lock cmpxchg [ebx], ecx
        sete al
        and eax, 1h
        pop ebx
        ret
js_CompareAndSwap     endp

        END