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      1 /* $NetBSD: atomic_swap_32.S,v 1.2 2015/03/27 06:42:37 matt Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2014 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Matt Thomas of 3am Software Foundry.
      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 ENTRY_NP(_atomic_swap_32)
     35 	amoswap.w.aq	a0, a1, 0(a0)
     36 	ret
     37 END(_atomic_swap_32)
     38 
     39 ATOMIC_OP_ALIAS(atomic_swap_32,_atomic_swap_32)
     40 ATOMIC_OP_ALIAS(atomic_swap_uint,_atomic_swap_32)
     41 #ifndef _LP64
     42 ATOMIC_OP_ALIAS(atomic_swap_ulong,_atomic_swap_32)
     43 ATOMIC_OP_ALIAS(atomic_swap_ptr,_atomic_swap_32)
     44 #endif
     45 CRT_ALIAS(__sync_lock_test_and_set_4,_atomic_swap_32)
     46 CRT_ALIAS(__atomic_exchange_4,_atomic_swap_32)
     47 STRONG_ALIAS(_atomic_swap_uint,_atomic_swap_32)
     48 #ifndef _LP64
     49 STRONG_ALIAS(_atomic_swap_ulong,_atomic_swap_32)
     50 STRONG_ALIAS(_atomic_swap_ptr,_atomic_swap_32)
     51 #endif
     52 
     53 ENTRY_NP(_atomic_release_32)
     54 	amoswap.w.rl	zero, zero, 0(a0)
     55 	ret
     56 END(_atomic_release_32)
     57 ATOMIC_OP_ALIAS(atomic_release_32,_atomic_release_32)
     58 
     59 CRT_ALIAS(__sync_lock_release_4,_atomic_release_32)
     60