minix/common/lib/libc/arch/m68k/gen/bswap32.S
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

55 lines
2.1 KiB
ArmAsm

/* $NetBSD: bswap32.S,v 1.5 2013/07/18 22:42:50 matt Exp $ */
/*
* Copyright (C) 1996 Scott Reynolds. 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* 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.
*/
#include <machine/asm.h>
#if defined(_KERNEL) || defined(_STANDALONE)
#define BSWAP32 _C_LABEL(bswap32)
#else /* defined(_KERNEL) || defined(_STANDALONE) */
#define BSWAP32 _C_LABEL(__bswap32)
#endif /* defined(_KERNEL) || defined(_STANDALONE) */
_ENTRY(BSWAP32)
movl 4(%sp),%d0
#ifdef __mcfisac__
byterev %d0
#elif defined(__mcoldfire__)
movl %d0,%d1
lsrl #8,%d0 | ABCD -> 0ABC
andl #0x00ff00ff,%d0 | 0ABC -> 0A0C
andl #0x00ff00ff,%d1 | ABCD -> 0B0D
lsll #8,%d1 | 0B0D -> B0D0
orl %d1,%d0 | 0A0C | B0D0 -> BADC
swap %d0 | BADC -> DCBA
#else
rolw #8,%d0
swap %d0
rolw #8,%d0
#endif
rts
END(BSWAP32)