xref: /onnv-gate/usr/src/lib/libc/port/gen/ldivide.c (revision 0:68f95e015346)
1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * CDDL HEADER START
3*0Sstevel@tonic-gate  *
4*0Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*0Sstevel@tonic-gate  * with the License.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate  * and limitations under the License.
13*0Sstevel@tonic-gate  *
14*0Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate  *
20*0Sstevel@tonic-gate  * CDDL HEADER END
21*0Sstevel@tonic-gate  */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24*0Sstevel@tonic-gate  * Use is subject to license terms.
25*0Sstevel@tonic-gate  */
26*0Sstevel@tonic-gate 
27*0Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
28*0Sstevel@tonic-gate 
29*0Sstevel@tonic-gate /*	Copyright (c) 1988 AT&T	*/
30*0Sstevel@tonic-gate /*	  All Rights Reserved  	*/
31*0Sstevel@tonic-gate 
32*0Sstevel@tonic-gate 
33*0Sstevel@tonic-gate #pragma weak ldivide = _ldivide
34*0Sstevel@tonic-gate #include	"synonyms.h"
35*0Sstevel@tonic-gate #include	<sys/types.h>
36*0Sstevel@tonic-gate #include	<sys/dl.h>
37*0Sstevel@tonic-gate #include	"libc.h"
38*0Sstevel@tonic-gate 
39*0Sstevel@tonic-gate dl_t
40*0Sstevel@tonic-gate ldivide(dl_t lop, dl_t rop)
41*0Sstevel@tonic-gate {
42*0Sstevel@tonic-gate 	int		cnt;
43*0Sstevel@tonic-gate 	dl_t		ans;
44*0Sstevel@tonic-gate 	dl_t		tmp;
45*0Sstevel@tonic-gate 	dl_t		div;
46*0Sstevel@tonic-gate 
47*0Sstevel@tonic-gate 	if (lsign(lop))
48*0Sstevel@tonic-gate 		lop = lsub(lzero, lop);
49*0Sstevel@tonic-gate 	if (lsign(rop))
50*0Sstevel@tonic-gate 		rop = lsub(lzero, rop);
51*0Sstevel@tonic-gate 
52*0Sstevel@tonic-gate 	ans = lzero;
53*0Sstevel@tonic-gate 	div = lzero;
54*0Sstevel@tonic-gate 
55*0Sstevel@tonic-gate 	for (cnt = 0; cnt < 63; cnt++) {
56*0Sstevel@tonic-gate 		div = lshiftl(div, 1);
57*0Sstevel@tonic-gate 		lop = lshiftl(lop, 1);
58*0Sstevel@tonic-gate 		if (lsign(lop))
59*0Sstevel@tonic-gate 			div.dl_lop |= 1;
60*0Sstevel@tonic-gate 		tmp = lsub(div, rop);
61*0Sstevel@tonic-gate 		ans = lshiftl(ans, 1);
62*0Sstevel@tonic-gate 		if (lsign(tmp) == 0) {
63*0Sstevel@tonic-gate 			ans.dl_lop |= 1;
64*0Sstevel@tonic-gate 			div = tmp;
65*0Sstevel@tonic-gate 		}
66*0Sstevel@tonic-gate 	}
67*0Sstevel@tonic-gate 
68*0Sstevel@tonic-gate 	return (ans);
69*0Sstevel@tonic-gate }
70