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bswap64.S revision 1.4 
      1 /*	$NetBSD: bswap64.S,v 1.4 2013/07/18 22:42:50 matt Exp $	*/
      2 
      3 /*
      4  * Copyright (C) 1996 Scott Reynolds.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. The name of the author may not be used to endorse or promote products
     15  *    derived from this software without specific prior written permission
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <machine/asm.h>
     30 
     31 ENTRY(bswap64)
     32 	movl	4(%sp),%d1
     33 	movl	8(%sp),%d0
     34 #ifdef __mcfisac__
     35 	byterev	%d0
     36 	byterev	%d1
     37 #elif defined(__mcoldfire__)
     38 	movl	%d3,-(%sp)
     39 	movl	%d2,-(%sp)
     40 	movl	#0x00ff00ff, %d3
     41 	movl	%d0,%d2
     42 	andl	%d3,%d2
     43 	lsll	#8,%d2
     44 	lsrl	#8,%d0
     45 	andl	%d3,%d0
     46 	orl	%d2,%d0
     47 	movl	%d1,%d2
     48 	andl	%d3,%d2
     49 	lsll	#8,%d2
     50 	lsrl	#8,%d1
     51 	andl	%d3,%d1
     52 	orl	%d2,%d1
     53 	movl	(%sp)+,%d2
     54 	movl	(%sp)+,%d3
     55 #else
     56 	rolw	#8,%d1
     57 	rolw	#8,%d0
     58 	swap	%d1
     59 	swap	%d0
     60 	rolw	#8,%d0
     61 	rolw	#8,%d1
     62 #endif
     63 	rts
     64 END(bswap64)
     65