/*

 * CDDL HEADER START

 *

 * The contents of this file are subject to the terms of the

 * Common Development and Distribution License (the "License").

 * You may not use this file except in compliance with the License.

 *

 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

 * or http://www.opensolaris.org/os/licensing.

 * See the License for the specific language governing permissions

 * and limitations under the License.

 *

 * When distributing Covered Code, include this CDDL HEADER in each

 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.

 * If applicable, add the following below this CDDL HEADER, with the

 * fields enclosed by brackets "[]" replaced with your own identifying

 * information: Portions Copyright [yyyy] [name of copyright owner]

 *

 * CDDL HEADER END

 */

/*

 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.

 * Use is subject to license terms.

 */

#include "SYS.h"

	/*

	 * NOTE: htonl/ntohl are identical routines, as are htons/ntohs.

	 * As such, they could be implemented as a single routine, using

	 * multiple ALTENTRY/SET_SIZE definitions. We don't do this so

	 * that they will have unique addresses, allowing DTrace and

	 * other debuggers to tell them apart. 

	 */

/*

 *	unsigned long htonl( hl )

 *	unsigned long ntohl( hl )

 *	long hl;

 *	reverses the byte order of 'uint32_t hl'

 */

	ENTRY(htonl)

	movl	%edi, %eax	/* %eax = hl */

	bswap	%eax		/* reverses the byte order of %eax */

	ret			/* return (%eax) */

	SET_SIZE(htonl)

	ENTRY(ntohl)

	movl	%edi, %eax	/* %eax = hl */

	bswap	%eax		/* reverses the byte order of %eax */

	ret			/* return (%eax) */

	SET_SIZE(ntohl)

/*

 *	unsigned short htons( hs )

 *	short hs;

 *

 *	reverses the byte order in hs.

 */

	ENTRY(htons)

	movl	%edi, %eax	/* %eax = hs */

	bswap	%eax		/* reverses the byte order of %eax */

	shrl	$16, %eax	/* moves high 16-bit to low 16-bit */

	ret			/* return (%eax) */

	SET_SIZE(htons)

	ENTRY(ntohs)

	movl	%edi, %eax	/* %eax = hs */

	bswap	%eax		/* reverses the byte order of %eax */

	shrl	$16, %eax	/* moves high 16-bit to low 16-bit */

	ret			/* return (%eax) */

	SET_SIZE(ntohs)