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atomic_cas_64.S revision 1.1 
      1 /*	$NetBSD: atomic_cas_64.S,v 1.1 2014/09/19 17:36:24 matt Exp $	*/
      2 /*-
      3  * Copyright (c) 2014 The NetBSD Foundation, Inc.
      4  * All rights reserved.
      5  *
      6  * This code is derived from software contributed to The NetBSD Foundation
      7  * by Matt Thomas <matt (at) 3am-software.com>
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     20  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     21  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     22  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     28  * POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifdef _LP64
     32 #include "atomic_op_asm.h"
     33 
     34 ENTRY_NP(_atomic_cas_64)
     35 1:	lr.d	v0, 0(a0)
     36 	bne	a1, v0, 2f
     37 	sc.d	v1, a2, 0(a0)
     38 	bnez	v1, 1b
     39 2:
     40 	ret
     41 END(_atomic_cas_64)
     42 
     43 ATOMIC_OP_ALIAS(atomic_cas_64,_atomic_cas_64)
     44 ATOMIC_OP_ALIAS(atomic_cas_ulong,_atomic_cas_64)
     45 STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_64)
     46 ATOMIC_OP_ALIAS(atomic_cas_ptr,_atomic_cas_64)
     47 STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_64)
     48 ATOMIC_OP_ALIAS(atomic_cas_ulong_ni,_atomic_cas_64)
     49 STRONG_ALIAS(_atomic_cas_ulong_ni,_atomic_cas_64)
     50 ATOMIC_OP_ALIAS(atomic_cas_ptr_ni,_atomic_cas_64)
     51 STRONG_ALIAS(_atomic_cas_ptr_ni,_atomic_cas_64)
     52 
     53 CRT_ALIAS(__sync_val_compare_and_swap_8,_atomic_cas_64)
     54 
     55 ENTRY_NP(_atomic_bool_cas_64)
     56 	li	v0, 0
     57 1:	lr.d	v1, 0(a0)
     58 	bne	a1, v1, 2f
     59 	sc.d	v1, a2, 0(a0)
     60 	bnez	v1, 1b
     61 	li	v0, 1
     62 2:
     63 	ret
     64 END(_atomic_bool_cas_64)
     65 
     66 ATOMIC_OP_ALIAS(atomic_bool_cas_64,_atomic_bool_cas_64)
     67 CRT_ALIAS(__bool_val_compare_and_swap_8,_atomic_bool_cas_64)
     68 #endif /* _LP64 */
     69