/*

 * CDDL HEADER START

 *

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

 * Common Development and Distribution License, Version 1.0 only

 * (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 2004 Sun Microsystems, Inc.  All rights reserved.

 * Use is subject to license terms.

 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*	Copyright (c) 1988 AT&T	*/

/*	  All Rights Reserved	*/

/*

 * This set of routines used to be implemented mostly in assembler.

 *

 * Since the purpose they have is now rather vestigial, and 64-bit

 * machines can do operations on 64-bit quantities pretty efficiently,

 * a C implementation seems quite adequate and much more maintainable.

 */

#pragma weak ladd = _ladd

#pragma weak lsub = _lsub

#pragma weak lshiftl = _lshiftl

#pragma weak lsign = _lsign

#pragma weak lmul = _lmul

#include "synonyms.h"

#include <sys/types.h>

#include <sys/dl.h>

typedef union {

	long	xword;

	dl_t	dl;

} dlx_t;

dl_t

ladd(dl_t lop, dl_t rop)

{

	dlx_t r;

	/* LINTED pointer cast may result in improper alignment */

	r.xword = *(long *)&lop + *(long *)&rop;

	return (r.dl);

}

dl_t

lshiftl(dl_t op, int cnt)

{

	dlx_t r;

	if (cnt < 0)

		/* LINTED pointer cast may result in improper alignment */

		r.xword = (long)(*(ulong_t *)&op >> (-cnt));

	else

		/* LINTED pointer cast may result in improper alignment */

		r.xword = *(long *)&op << cnt;

	return (r.dl);

}

int

lsign(dl_t op)

{

	/* LINTED pointer cast may result in improper alignment */

	return ((*(long *)&op) >> 63);

}

dl_t

lsub(dl_t lop, dl_t rop)

{

	dlx_t r;

	/* LINTED pointer cast may result in improper alignment */

	r.xword = *(long *)&lop - *(long *)&rop;

	return (r.dl);

}

dl_t

lmul(dl_t lop, dl_t rop)

{

	dlx_t r;

	/* LINTED pointer cast may result in improper alignment */

	r.xword = *(long *)&lop * *(long *)&rop;

	return (r.dl);

}