0a6a1f1d05
This brings our tree to NetBSD 7.0, as found on -current on the 10-10-2015. This updates: - LLVM to 3.6.1 - GCC to GCC 5.1 - Replace minix/commands/zdump with usr.bin/zdump - external/bsd/libelf has moved to /external/bsd/elftoolchain/ - Import ctwm - Drop sprintf from libminc Change-Id: I149836ac18e9326be9353958bab9b266efb056f0
68 lines
2.2 KiB
C
68 lines
2.2 KiB
C
/* $NetBSD: atomic_xor_64_cas.c,v 1.3 2014/06/23 21:53:45 joerg Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2014 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Jason R. Thorpe.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/atomic.h>
|
|
|
|
#ifdef __HAVE_ATOMIC64_OPS
|
|
|
|
uint64_t fetch_and_xor_8(volatile uint64_t *, uint64_t, ...)
|
|
asm("__sync_fetch_and_xor_8");
|
|
uint64_t xor_and_fetch_8(volatile uint64_t *, uint64_t, ...)
|
|
asm("__sync_xor_and_fetch_8");
|
|
|
|
uint64_t
|
|
fetch_and_xor_8(volatile uint64_t *addr, uint64_t val, ...)
|
|
{
|
|
uint64_t old, new;
|
|
|
|
do {
|
|
old = *addr;
|
|
new = old ^ val;
|
|
} while (atomic_cas_64(addr, old, new) != old);
|
|
return old;
|
|
}
|
|
|
|
uint64_t
|
|
xor_and_fetch_8(volatile uint64_t *addr, uint64_t val, ...)
|
|
{
|
|
uint64_t old, new;
|
|
|
|
do {
|
|
old = *addr;
|
|
new = old ^ val;
|
|
} while (atomic_cas_64(addr, old, new) != old);
|
|
return new;
|
|
}
|
|
|
|
__strong_alias(__atomic_fetch_xor_8,__sync_fetch_and_xor_8)
|
|
|
|
#endif
|