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byte_swap_2.S revision 1.2 
      1 /*	$NetBSD: byte_swap_2.S,v 1.2 2006/04/07 14:27:33 cherry Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1996 Carnegie-Mellon University.
      5  * All rights reserved.
      6  *
      7  * Author: Chris G. Demetriou
      8  *
      9  * Permission to use, copy, modify and distribute this software and
     10  * its documentation is hereby granted, provided that both the copyright
     11  * notice and this permission notice appear in all copies of the
     12  * software, derivative works or modified versions, and any portions
     13  * thereof, and that both notices appear in supporting documentation.
     14  *
     15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     18  *
     19  * Carnegie Mellon requests users of this software to return to
     20  *
     21  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     22  *  School of Computer Science
     23  *  Carnegie Mellon University
     24  *  Pittsburgh PA 15213-3890
     25  *
     26  * any improvements or extensions that they make and grant Carnegie the
     27  * rights to redistribute these changes.
     28  */
     29 
     30 #include <machine/asm.h>
     31 
     32 #ifndef NAME
     33 #error NAME not defined
     34 #endif
     35 
     36 /*
     37  * Byte-swap a 2-byte quantity.  (Convert 0x0123 to 0x2301.)
     38  *
     39  * Argument is an unsigned 2-byte integer (u_int16_t).
     40  */
     41 ENTRY(NAME, 1)
     42 	mux1	r16=in0,@rev
     43 	;;
     44 	extr.u	r8=r16,48,16
     45 	br.ret.sptk.few rp
     46 END(NAME)
     47