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      1  1.6   nonaka /*	$NetBSD: byte_swap_2.S,v 1.6 2006/04/14 09:23:01 nonaka Exp $	*/
      2  1.1   itojun 
      3  1.1   itojun /*-
      4  1.1   itojun  * Copyright (C) 1999 SHIMIZU Ryo.  All rights reserved.
      5  1.1   itojun  *
      6  1.1   itojun  * Redistribution and use in source and binary forms, with or without
      7  1.1   itojun  * modification, are permitted provided that the following conditions
      8  1.1   itojun  * are met:
      9  1.1   itojun  * 1. Redistributions of source code must retain the above copyright
     10  1.1   itojun  *    notice, this list of conditions and the following disclaimer.
     11  1.1   itojun  * 2. Redistributions in binary form must reproduce the above copyright
     12  1.1   itojun  *    notice, this list of conditions and the following disclaimer in the
     13  1.1   itojun  *    documentation and/or other materials provided with the distribution.
     14  1.1   itojun  * 3. The name of the author may not be used to endorse or promote products
     15  1.1   itojun  *    derived from this software without specific prior written permission.
     16  1.1   itojun  *
     17  1.1   itojun  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  1.1   itojun  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  1.1   itojun  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  1.1   itojun  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  1.1   itojun  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  1.1   itojun  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  1.1   itojun  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  1.1   itojun  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  1.1   itojun  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26  1.1   itojun  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  1.1   itojun  */
     28  1.1   itojun 
     29  1.1   itojun #include <machine/asm.h>
     30  1.6   nonaka 
     31  1.6   nonaka #undef _LOCORE
     32  1.6   nonaka #define	_LOCORE		/* XXX not really, just assembly-code source */
     33  1.2  msaitoh #include <machine/endian.h>
     34  1.1   itojun 
     35  1.1   itojun ENTRY(bswap16)
     36  1.2  msaitoh #if BYTE_ORDER == LITTLE_ENDIAN
     37  1.1   itojun ALTENTRY(ntohs)
     38  1.1   itojun ALTENTRY(htons)
     39  1.2  msaitoh #endif
     40  1.5      uwe 	extu.w	r4, r4
     41  1.1   itojun 	rts
     42  1.3      uwe 	 swap.b	r4, r0
     43  1.3      uwe 
     44  1.2  msaitoh #if BYTE_ORDER == BIG_ENDIAN
     45  1.3      uwe ENTRY(ntohs)
     46  1.2  msaitoh ALTENTRY(htons)
     47  1.3      uwe 	rts
     48  1.5      uwe 	 extu.w	r4, r0
     49  1.2  msaitoh #endif
     50