7bdb802715
r=os2team, sr=brendan@mozilla.org Add ASM implementation of js_CompareAndSwap for OS/2 VACPP git-svn-id: svn://10.0.0.236/trunk@107572 18797224-902f-48f8-a5cc-f745e15eee43
61 lines
2.2 KiB
NASM
61 lines
2.2 KiB
NASM
COMMENT | -*- Mode: asm; tab-width: 8; c-basic-offset: 4 -*-
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***** BEGIN LICENSE BLOCK *****
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Version: MPL 1.1/GPL 2.0/LGPL 2.1
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The contents of this file are subject to the Mozilla Public License Version
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1.1 (the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.mozilla.org/MPL/
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Software distributed under the License is distributed on an "AS IS" basis,
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WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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for the specific language governing rights and limitations under the
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License.
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The Original Code is an OS/2 implementation of js_CompareAndSwap in assembly
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The Initial Developer of the Original Code is
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IBM Corporation.
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Portions created by the Initial Developer are Copyright (C) 2001
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the Initial Developer. All Rights Reserved.
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Contributor(s):
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Alternatively, the contents of this file may be used under the terms of
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either the GNU General Public License Version 2 or later (the "GPL"), or
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the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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in which case the provisions of the GPL or the LGPL are applicable instead
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of those above. If you wish to allow use of your version of this file only
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under the terms of either the GPL or the LGPL, and not to allow others to
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use your version of this file under the terms of the MPL, indicate your
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decision by deleting the provisions above and replace them with the notice
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and other provisions required by the GPL or the LGPL. If you do not delete
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the provisions above, a recipient may use your version of this file under
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the terms of any one of the MPL, the GPL or the LGPL.
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***** END LICENSE BLOCK *****
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.486P
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.MODEL FLAT, OPTLINK
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.STACK
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.CODE
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;;;---------------------------------------------------------------------
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;;; int _Optlink js_CompareAndSwap(jsword *w, jsword ov, jsword nv)
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;;;---------------------------------------------------------------------
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js_CompareAndSwap PROC OPTLINK EXPORT
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push ebx
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mov ebx, eax
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mov eax, edx
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mov edx, ebx
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lock cmpxchg [ebx], ecx
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sete al
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and eax, 1h
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pop ebx
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ret
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js_CompareAndSwap endp
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END
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