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      1  1.4   isaki /*	$NetBSD: atomic_or_16_cas.c,v 1.4 2019/03/01 09:57:32 isaki Exp $	*/
      2  1.2  martin 
      3  1.2  martin /*-
      4  1.2  martin  * Copyright (c) 2007 The NetBSD Foundation, Inc.
      5  1.2  martin  * All rights reserved.
      6  1.2  martin  *
      7  1.2  martin  * This code is derived from software contributed to The NetBSD Foundation
      8  1.2  martin  * by Jason R. Thorpe.
      9  1.2  martin  *
     10  1.2  martin  * Redistribution and use in source and binary forms, with or without
     11  1.2  martin  * modification, are permitted provided that the following conditions
     12  1.2  martin  * are met:
     13  1.2  martin  * 1. Redistributions of source code must retain the above copyright
     14  1.2  martin  *    notice, this list of conditions and the following disclaimer.
     15  1.2  martin  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.2  martin  *    notice, this list of conditions and the following disclaimer in the
     17  1.2  martin  *    documentation and/or other materials provided with the distribution.
     18  1.2  martin  *
     19  1.2  martin  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.2  martin  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.2  martin  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.2  martin  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.2  martin  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.2  martin  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.2  martin  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.2  martin  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.2  martin  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.2  martin  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.2  martin  * POSSIBILITY OF SUCH DAMAGE.
     30  1.2  martin  */
     31  1.2  martin 
     32  1.2  martin #include "atomic_op_namespace.h"
     33  1.2  martin 
     34  1.2  martin #include <sys/atomic.h>
     35  1.2  martin 
     36  1.2  martin uint16_t fetch_and_or_2(volatile uint16_t *, uint16_t, ...)
     37  1.2  martin     asm("__sync_fetch_and_or_2");
     38  1.2  martin uint16_t or_and_fetch_2(volatile uint16_t *, uint16_t, ...)
     39  1.2  martin     asm("__sync_or_and_fetch_2");
     40  1.2  martin 
     41  1.2  martin uint16_t
     42  1.2  martin fetch_and_or_2(volatile uint16_t *addr, uint16_t val, ...)
     43  1.2  martin {
     44  1.2  martin 	uint16_t old, new;
     45  1.2  martin 
     46  1.2  martin 	do {
     47  1.2  martin 		old = *addr;
     48  1.2  martin 		new = old | val;
     49  1.2  martin 	} while (atomic_cas_16(addr, old, new) != old);
     50  1.2  martin 	return old;
     51  1.2  martin }
     52  1.2  martin 
     53  1.2  martin uint16_t
     54  1.2  martin or_and_fetch_2(volatile uint16_t *addr, uint16_t val, ...)
     55  1.2  martin {
     56  1.2  martin 	uint16_t old, new;
     57  1.2  martin 
     58  1.2  martin 	do {
     59  1.2  martin 		old = *addr;
     60  1.2  martin 		new = old | val;
     61  1.2  martin 	} while (atomic_cas_16(addr, old, new) != old);
     62  1.4   isaki 	return new;
     63  1.2  martin }
     64  1.2  martin 
     65  1.3   joerg __strong_alias(__atomic_fetch_or_2,__sync_fetch_and_or_2)
     66