lmul.c revision 7257d1b4d25bfac0c802847390e98a464fd787ac
/*
* 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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#include "lint.h"
#include "sys/types.h"
#include "sys/dl.h"
dl_t
lmul(dl_t lop, dl_t rop)
{
dl_t ans;
dl_t tmp;
int jj;
ans = lzero;
for (jj = 0; jj <= 63; jj++) {
if ((lshiftl(rop, -jj).dl_lop & 1) == 0)
continue;
tmp = lshiftl(lop, jj);
tmp.dl_hop &= 0x7fffffff;
ans = ladd(ans, tmp);
};
return (ans);
}