Home | History | Annotate | Line # | Download | only in atomic
atomic_cas.S revision 1.7.12.1 
      1 /*	$NetBSD: atomic_cas.S,v 1.7.12.1 2014/08/19 23:45:13 tls 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 __RCSID("$NetBSD: atomic_cas.S,v 1.7.12.1 2014/08/19 23:45:13 tls Exp $")
     35 
     36 	.text
     37 ENTRY(_atomic_cas_32)
     38 	mr	%r10,%r3
     39 1:	lwarx	%r3,0,%r10
     40 	cmpw	%r3,%r4
     41 	bnelr-
     42 	stwcx.	%r5,0,%r10
     43 	beqlr+
     44 	b	1b
     45 END(_atomic_cas_32)
     46 
     47 ATOMIC_OP_ALIAS(atomic_cas_32,_atomic_cas_32)
     48 ATOMIC_OP_ALIAS(atomic_cas_32_ni,_atomic_cas_32)
     49 STRONG_ALIAS(_atomic_cas_32_ni,_atomic_cas_32)
     50 
     51 ATOMIC_OP_ALIAS(atomic_cas_uint,_atomic_cas_32)
     52 ATOMIC_OP_ALIAS(atomic_cas_uint_ni,_atomic_cas_32)
     53 
     54 STRONG_ALIAS(_atomic_cas_uint,_atomic_cas_32)
     55 STRONG_ALIAS(_atomic_cas_uint_ni,_atomic_cas_32)
     56 
     57 #if defined(_LP64)
     58 ENTRY(_atomic_cas_64)
     59 	mr	%r10,%r3
     60 1:	ldarx	%r3,0,%r10
     61 	cmpd	%r3,%r4
     62 	bnelr-
     63 	stdcx.	%r5,0,%r10
     64 	beqlr+
     65 	b	1b
     66 END(_atomic_cas_64)
     67 
     68 ATOMIC_OP_ALIAS(atomic_cas_64,_atomic_cas_64)
     69 ATOMIC_OP_ALIAS(atomic_cas_64_ni,_atomic_cas_64)
     70 STRONG_ALIAS(_atomic_cas_64_ni,_atomic_cas_64)
     71 
     72 ATOMIC_OP_ALIAS(atomic_cas_ulong,_atomic_cas_64)
     73 ATOMIC_OP_ALIAS(atomic_cas_ulong_ni,_atomic_cas_64)
     74 
     75 ATOMIC_OP_ALIAS(atomic_cas_ptr,_atomic_cas_64)
     76 ATOMIC_OP_ALIAS(atomic_cas_ptr_ni,_atomic_cas_64)
     77 
     78 STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_64)
     79 STRONG_ALIAS(_atomic_cas_ulong_ni,_atomic_cas_64)
     80 
     81 STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_64)
     82 STRONG_ALIAS(_atomic_cas_ptr_ni,_atomic_cas_64)
     83 #else
     84 ATOMIC_OP_ALIAS(atomic_cas_ulong,_atomic_cas_32)
     85 ATOMIC_OP_ALIAS(atomic_cas_ulong_ni,_atomic_cas_32)
     86 
     87 ATOMIC_OP_ALIAS(atomic_cas_ptr,_atomic_cas_32)
     88 ATOMIC_OP_ALIAS(atomic_cas_ptr_ni,_atomic_cas_32)
     89 
     90 STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_32)
     91 STRONG_ALIAS(_atomic_cas_ulong_ni,_atomic_cas_32)
     92 
     93 STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_32)
     94 STRONG_ALIAS(_atomic_cas_ptr_ni,_atomic_cas_32)
     95 #endif
     96