1/* $NetBSD: byte_swap_2.S,v 1.1 2006/04/07 13:57:43 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@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 */ 41ENTRY(NAME, 1) 42 mux1 r16=in0,@rev 43 ;; 44 extr.u r8=r16,48,16 45 br.ret.sptk.few rp 46END(NAME) 47