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/* $OpenBSD: endian.h,v 1.21 2014/10/22 23:56:47 dlg Exp $ */
/*-
* Copyright (c) 1997 Niklas Hallqvist. All rights reserved.
*
* 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 AUTHOR ``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 AUTHOR 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.
*/
#ifndef _POWERPC_ENDIAN_H_
#define _POWERPC_ENDIAN_H_
#ifdef _KERNEL
static inline __uint16_t
__mswap16(volatile const __uint16_t *m)
{
__uint16_t v;
__asm("lhbrx %0, 0, %1"
: "=r" (v)
: "r" (m), "m" (*m));
return (v);
}
static inline __uint32_t
__mswap32(volatile const __uint32_t *m)
{
__uint32_t v;
__asm("lwbrx %0, 0, %1"
: "=r" (v)
: "r" (m), "m" (*m));
return (v);
}
static inline __uint64_t
__mswap64(volatile const __uint64_t *m)
{
__uint32_t *a = (__uint32_t *)m;
__uint64_t v;
v = (__uint64_t)__mswap32(a + 1) << 32 |
(__uint64_t)__mswap32(a);
return (v);
}
static inline void
__swapm16(volatile __uint16_t *m, __uint16_t v)
{
__asm("sthbrx %1, 0, %2"
: "=m" (*m)
: "r" (v), "r" (m));
}
static inline void
__swapm32(volatile __uint32_t *m, __uint32_t v)
{
__asm("stwbrx %1, 0, %2"
: "=m" (*m)
: "r" (v), "r" (m));
}
static inline void
__swapm64(volatile __uint64_t *m, __uint64_t v)
{
__uint32_t *a = (__uint32_t *)m;
__swapm32(a + 1, v >> 32);
__swapm32(a, v);
}
#define __HAVE_MD_SWAPIO
#endif /* _KERNEL */
#undef _BIG_ENDIAN /* XXX - gcc may define _BIG_ENDIAN too */
#define _BYTE_ORDER _BIG_ENDIAN
#ifndef __FROM_SYS__ENDIAN
#include <sys/endian.h>
#endif
#endif /* _POWERPC_ENDIAN_H_ */
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