xref: /onnv-gate/usr/src/lib/libc/port/fp/moddi3.c (revision 0:68f95e015346)
1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * Copyright (c) 1992, 1993
3*0Sstevel@tonic-gate  *	The Regents of the University of California.  All rights reserved.
4*0Sstevel@tonic-gate  *
5*0Sstevel@tonic-gate  * This software was developed by the Computer Systems Engineering group
6*0Sstevel@tonic-gate  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
7*0Sstevel@tonic-gate  * contributed to Berkeley.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * Redistribution and use in source and binary forms, with or without
10*0Sstevel@tonic-gate  * modification, are permitted provided that the following conditions
11*0Sstevel@tonic-gate  * are met:
12*0Sstevel@tonic-gate  * 1. Redistributions of source code must retain the above copyright
13*0Sstevel@tonic-gate  *    notice, this list of conditions and the following disclaimer.
14*0Sstevel@tonic-gate  * 2. Redistributions in binary form must reproduce the above copyright
15*0Sstevel@tonic-gate  *    notice, this list of conditions and the following disclaimer in the
16*0Sstevel@tonic-gate  *    documentation and/or other materials provided with the distribution.
17*0Sstevel@tonic-gate  * 3. All advertising materials mentioning features or use of this software
18*0Sstevel@tonic-gate  *    must display the following acknowledgement:
19*0Sstevel@tonic-gate  *	This product includes software developed by the University of
20*0Sstevel@tonic-gate  *	California, Berkeley and its contributors.
21*0Sstevel@tonic-gate  * 4. Neither the name of the University nor the names of its contributors
22*0Sstevel@tonic-gate  *    may be used to endorse or promote products derived from this software
23*0Sstevel@tonic-gate  *    without specific prior written permission.
24*0Sstevel@tonic-gate  *
25*0Sstevel@tonic-gate  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26*0Sstevel@tonic-gate  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27*0Sstevel@tonic-gate  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28*0Sstevel@tonic-gate  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29*0Sstevel@tonic-gate  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30*0Sstevel@tonic-gate  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31*0Sstevel@tonic-gate  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32*0Sstevel@tonic-gate  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33*0Sstevel@tonic-gate  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34*0Sstevel@tonic-gate  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35*0Sstevel@tonic-gate  * SUCH DAMAGE.
36*0Sstevel@tonic-gate  */
37*0Sstevel@tonic-gate 
38*0Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
39*0Sstevel@tonic-gate 
40*0Sstevel@tonic-gate #include "quadint.h"
41*0Sstevel@tonic-gate 
42*0Sstevel@tonic-gate #pragma weak __moddi3 = ___moddi3
43*0Sstevel@tonic-gate 
44*0Sstevel@tonic-gate /*
45*0Sstevel@tonic-gate  * Return remainder after dividing two signed quads.
46*0Sstevel@tonic-gate  *
47*0Sstevel@tonic-gate  * XXX
48*0Sstevel@tonic-gate  * If -1/2 should produce -1 on this machine, this code is wrong.
49*0Sstevel@tonic-gate  */
50*0Sstevel@tonic-gate longlong_t
___moddi3(longlong_t a,longlong_t b)51*0Sstevel@tonic-gate ___moddi3(longlong_t a, longlong_t b)
52*0Sstevel@tonic-gate {
53*0Sstevel@tonic-gate 	u_longlong_t ua, ub, ur;
54*0Sstevel@tonic-gate 	int neg;
55*0Sstevel@tonic-gate 
56*0Sstevel@tonic-gate 	if (a < 0)
57*0Sstevel@tonic-gate 		ua = -(u_longlong_t)a, neg = 1;
58*0Sstevel@tonic-gate 	else
59*0Sstevel@tonic-gate 		ua = a, neg = 0;
60*0Sstevel@tonic-gate 	if (b < 0)
61*0Sstevel@tonic-gate 		ub = -(u_longlong_t)b;
62*0Sstevel@tonic-gate 	else
63*0Sstevel@tonic-gate 		ub = b;
64*0Sstevel@tonic-gate 	(void) ___qdivrem(ua, ub, &ur);
65*0Sstevel@tonic-gate 	return (neg ? -ur : ur);
66*0Sstevel@tonic-gate }
67