/*	$NetBSD: mpyaccs.c,v 1.5 2012/02/04 17:03:10 skrll Exp $	*/

/*	$OpenBSD: mpyaccs.c,v 1.4 2001/03/29 03:58:18 mickey Exp $	*/

/*
 * Copyright 1996 1995 by Open Software Foundation, Inc.
 *              All Rights Reserved
 *
 * Permission to use, copy, modify, and distribute this software and
 * its documentation for any purpose and without fee is hereby granted,
 * provided that the above copyright notice appears in all copies and
 * that both the copyright notice and this permission notice appear in
 * supporting documentation.
 *
 * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE.
 *
 * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
 * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 */
/*
 * pmk1.1
 */
/*
 * (c) Copyright 1986 HEWLETT-PACKARD COMPANY
 *
 * To anyone who acknowledges that this file is provided "AS IS"
 * without any express or implied warranty:
 *     permission to use, copy, modify, and distribute this file
 * for any purpose is hereby granted without fee, provided that
 * the above copyright notice and this notice appears in all
 * copies, and that the name of Hewlett-Packard Company not be
 * used in advertising or publicity pertaining to distribution
 * of the software without specific, written prior permission.
 * Hewlett-Packard Company makes no representations about the
 * suitability of this software for any purpose.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mpyaccs.c,v 1.5 2012/02/04 17:03:10 skrll Exp $");

#include "md.h"

void
mpyaccs(int opnd1, int opnd2, struct mdsfu_register *result)
{
	struct mdsfu_register temp;
	int carry, sign;

	impys(&opnd1,&opnd2,&temp);

	/* get result of low word add, and check for carry out */
	if ((result_lo += (unsigned)temp.rslt_lo) < (unsigned)temp.rslt_lo)
		carry = 1;
	else carry = 0;

	/* get result of high word add, and determine overflow status */
	sign = result_hi ^ temp.rslt_hi;
	result_hi += temp.rslt_hi + carry;
	if (sign >= 0 && (temp.rslt_hi ^ result_hi) < 0) overflow = true;

	return;
}