common/lib/libc/arch/arm/gen/byte_swap_2.S
author martin <martin@NetBSD.org>
Mon, 28 Apr 2008 20:22:51 +0000
branchtrunk
changeset 169261 0fba8181c5ff
parent 143234 734f0fc1e927
child 214765 b0a98d98baf8
child 277751 2b02a09a4bef
child 280063 0f75ed31085e
child 280379 2e0a922c71ca
permissions -rw-r--r--
Remove clause 3 and 4 from TNF licenses

/*	$NetBSD: byte_swap_2.S,v 1.4 2008/04/28 20:22:52 martin Exp $	*/

/*-
 * Copyright (c) 1999 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Charles M. Hannum.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <machine/asm.h>

#if defined(_KERNEL) || defined(_STANDALONE)
_ENTRY(_C_LABEL(bswap16))
#else
_ENTRY(_C_LABEL(__bswap16))
#endif
#if BYTE_ORDER == LITTLE_ENDIAN
_ENTRY(_C_LABEL(ntohs))
_ENTRY(_C_LABEL(htons))
#endif
_PROF_PROLOGUE
	and		r1, r0, #0xff
	mov		r0, r0, lsr #8
	orr		r0, r0, r1, lsl #8
	RET