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      1  1.9  joerg /*	$NetBSD: atomic_add_64_cas.c,v 1.9 2014/06/23 21:53:45 joerg Exp $	*/
      2  1.2     ad 
      3  1.2     ad /*-
      4  1.2     ad  * Copyright (c) 2007 The NetBSD Foundation, Inc.
      5  1.2     ad  * All rights reserved.
      6  1.2     ad  *
      7  1.2     ad  * This code is derived from software contributed to The NetBSD Foundation
      8  1.2     ad  * by Jason R. Thorpe.
      9  1.2     ad  *
     10  1.2     ad  * Redistribution and use in source and binary forms, with or without
     11  1.2     ad  * modification, are permitted provided that the following conditions
     12  1.2     ad  * are met:
     13  1.2     ad  * 1. Redistributions of source code must retain the above copyright
     14  1.2     ad  *    notice, this list of conditions and the following disclaimer.
     15  1.2     ad  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.2     ad  *    notice, this list of conditions and the following disclaimer in the
     17  1.2     ad  *    documentation and/or other materials provided with the distribution.
     18  1.2     ad  *
     19  1.2     ad  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.2     ad  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.2     ad  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.2     ad  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.2     ad  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.2     ad  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.2     ad  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.2     ad  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.2     ad  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.2     ad  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.2     ad  * POSSIBILITY OF SUCH DAMAGE.
     30  1.2     ad  */
     31  1.2     ad 
     32  1.2     ad #include "atomic_op_namespace.h"
     33  1.2     ad 
     34  1.2     ad #include <sys/atomic.h>
     35  1.2     ad 
     36  1.4     ad #ifdef __HAVE_ATOMIC64_OPS
     37  1.4     ad 
     38  1.8  joerg uint64_t fetch_and_add_8(volatile uint64_t *, uint64_t, ...)
     39  1.8  joerg     asm("__sync_fetch_and_add_8");
     40  1.7   matt 
     41  1.7   matt uint64_t
     42  1.8  joerg fetch_and_add_8(volatile uint64_t *addr, uint64_t val, ...)
     43  1.2     ad {
     44  1.2     ad 	uint64_t old, new;
     45  1.2     ad 
     46  1.2     ad 	do {
     47  1.2     ad 		old = *addr;
     48  1.2     ad 		new = old + val;
     49  1.2     ad 	} while (atomic_cas_64(addr, old, new) != old);
     50  1.7   matt 	return old;
     51  1.7   matt }
     52  1.7   matt 
     53  1.7   matt void
     54  1.7   matt atomic_add_64(volatile uint64_t *addr, int64_t val)
     55  1.7   matt {
     56  1.8  joerg    (void) fetch_and_add_8(addr, val);
     57  1.2     ad }
     58  1.2     ad 
     59  1.9  joerg __strong_alias(__atomic_fetch_add_8,__sync_fetch_and_add_8)
     60  1.9  joerg 
     61  1.2     ad #undef atomic_add_64
     62  1.2     ad atomic_op_alias(atomic_add_64,_atomic_add_64)
     63  1.2     ad 
     64  1.2     ad #if defined(_LP64)
     65  1.2     ad #undef atomic_add_long
     66  1.2     ad atomic_op_alias(atomic_add_long,_atomic_add_64)
     67  1.2     ad __strong_alias(_atomic_add_long,_atomic_add_64)
     68  1.2     ad 
     69  1.2     ad #undef atomic_add_ptr
     70  1.2     ad atomic_op_alias(atomic_add_ptr,_atomic_add_64)
     71  1.2     ad __strong_alias(_atomic_add_ptr,_atomic_add_64)
     72  1.2     ad #endif /* _LP64 */
     73  1.4     ad 
     74  1.4     ad #endif
     75