Home | History | Annotate | Line # | Download | only in atomic
atomic_cas.S revision 1.5.2.1 
      1 /*	$NetBSD: atomic_cas.S,v 1.5.2.1 2008/06/23 04:26:45 wrstuden Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2007, 2008 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include "atomic_op_asm.h"
     33 
     34 	.text
     35 
     36 ENTRY(_atomic_cas_32)
     37 1:	lwarx	%r10,0,%r3
     38 	cmpw	%r10,%r4
     39 	bne-	2f
     40 	stwcx.	%r5,0,%r3
     41 	bne-	1b
     42 2:	mr	%r3,%r10
     43 	blr
     44 
     45 ATOMIC_OP_ALIAS(atomic_cas_32,_atomic_cas_32)
     46 ATOMIC_OP_ALIAS(atomic_cas_uint,_atomic_cas_32)
     47 STRONG_ALIAS(_atomic_cas_uint,_atomic_cas_32)
     48 #if !defined(_LP64)
     49 ATOMIC_OP_ALIAS(atomic_cas_ulong,_atomic_cas_32)
     50 STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_32)
     51 ATOMIC_OP_ALIAS(atomic_cas_ptr,_atomic_cas_32)
     52 STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_32)
     53 #endif
     54 
     55 ATOMIC_OP_ALIAS(atomic_cas_32_ni,_atomic_cas_32)
     56 STRONG_ALIAS(_atomic_cas_32_ni,_atomic_cas_32)
     57 ATOMIC_OP_ALIAS(atomic_cas_uint_ni,_atomic_cas_32)
     58 STRONG_ALIAS(_atomic_cas_uint_ni,_atomic_cas_32)
     59 #if !defined(_LP64)
     60 ATOMIC_OP_ALIAS(atomic_cas_ulong_ni,_atomic_cas_32)
     61 STRONG_ALIAS(_atomic_cas_ulong_ni,_atomic_cas_32)
     62 ATOMIC_OP_ALIAS(atomic_cas_ptr_ni,_atomic_cas_32)
     63 STRONG_ALIAS(_atomic_cas_ptr_ni,_atomic_cas_32)
     64 #endif
     65