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      1  1.10   joerg /*	$NetBSD: atomic_and_32_cas.c,v 1.10 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   1.8   joerg uint32_t fetch_and_and_4(volatile uint32_t *, uint32_t, ...)
     37   1.9  martin #if defined(_LIBC) || defined(_HARDKERNEL)
     38   1.9  martin     asm("__sync_fetch_and_and_4");	/* C runtime internal */
     39   1.9  martin #else
     40   1.9  martin     ;
     41   1.9  martin #endif
     42   1.6    matt 
     43   1.6    matt uint32_t
     44   1.8   joerg fetch_and_and_4(volatile uint32_t *addr, uint32_t val, ...)
     45   1.2      ad {
     46   1.2      ad 	uint32_t old, new;
     47   1.2      ad 
     48   1.2      ad 	do {
     49   1.2      ad 		old = *addr;
     50   1.2      ad 		new = old & val;
     51   1.2      ad 	} while (atomic_cas_32(addr, old, new) != old);
     52   1.6    matt 	return old;
     53   1.6    matt }
     54   1.6    matt 
     55   1.6    matt void
     56   1.6    matt atomic_and_32(volatile uint32_t *addr, uint32_t val)
     57   1.6    matt {
     58   1.8   joerg 	(void) fetch_and_and_4(addr, val);
     59   1.2      ad }
     60   1.2      ad 
     61  1.10   joerg __strong_alias(__atomic_fetch_and_4,__sync_fetch_and_and_4)
     62  1.10   joerg 
     63   1.2      ad #undef atomic_and_32
     64   1.2      ad atomic_op_alias(atomic_and_32,_atomic_and_32)
     65   1.5    matt 
     66   1.2      ad #undef atomic_and_uint
     67   1.2      ad atomic_op_alias(atomic_and_uint,_atomic_and_32)
     68   1.2      ad __strong_alias(_atomic_and_uint,_atomic_and_32)
     69   1.2      ad #if !defined(_LP64)
     70   1.2      ad #undef atomic_and_ulong
     71   1.2      ad atomic_op_alias(atomic_and_ulong,_atomic_and_32)
     72   1.2      ad __strong_alias(_atomic_and_ulong,_atomic_and_32)
     73   1.2      ad #endif /* _LP64 */
     74