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byte_swap_2.S revision 1.1 
      1 /* $FreeBSD$ */
      2 /*	$NetBSD: byte_swap_2.S,v 1.1 2006/04/07 13:57:43 cherry Exp $	*/
      3 
      4 /*-
      5  * Copyright (c) 1996 Carnegie-Mellon University.
      6  * All rights reserved.
      7  *
      8  * Author: Chris G. Demetriou
      9  *
     10  * Permission to use, copy, modify and distribute this software and
     11  * its documentation is hereby granted, provided that both the copyright
     12  * notice and this permission notice appear in all copies of the
     13  * software, derivative works or modified versions, and any portions
     14  * thereof, and that both notices appear in supporting documentation.
     15  *
     16  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     17  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     18  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     19  *
     20  * Carnegie Mellon requests users of this software to return to
     21  *
     22  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     23  *  School of Computer Science
     24  *  Carnegie Mellon University
     25  *  Pittsburgh PA 15213-3890
     26  *
     27  * any improvements or extensions that they make and grant Carnegie the
     28  * rights to redistribute these changes.
     29  */
     30 
     31 #include <machine/asm.h>
     32 
     33 #ifndef NAME
     34 #error NAME not defined
     35 #endif
     36 
     37 /*
     38  * Byte-swap a 2-byte quantity.  (Convert 0x0123 to 0x2301.)
     39  *
     40  * Argument is an unsigned 2-byte integer (u_int16_t).
     41  */
     42 ENTRY(NAME, 1)
     43 	mux1	r16=in0,@rev
     44 	;;
     45 	extr.u	r8=r16,48,16
     46 	br.ret.sptk.few rp
     47 END(NAME)
     48