xref: /illumos-gate/usr/src/lib/libm/common/R/remainderf.c (revision b819cea2f73f98c5662230cc9affc8cc84f77fcf)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
24  */
25 /*
26  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
27  * Use is subject to license terms.
28  */
29 
30 #pragma weak __remainderf = remainderf
31 
32 #include "libm.h"
33 
34 float
35 remainderf(float x, float y) {
36 	if (isnanf(x) || isnanf(y))
37 		return (x * y);
38 	if (y == 0.0f || (*(int *) &x & ~0x80000000) == 0x7f800000) {
39 		/* y is 0 or x is infinite; raise invalid and return NaN */
40 		y = 0.0f;
41 		*(int *) &x = 0x7f800000;
42 		return (x * y);
43 	}
44 	return ((float) remainder((double) x, (double) y));
45 }
46