1*25c28e83SPiotr Jasiukajtis /*
2*25c28e83SPiotr Jasiukajtis * CDDL HEADER START
3*25c28e83SPiotr Jasiukajtis *
4*25c28e83SPiotr Jasiukajtis * The contents of this file are subject to the terms of the
5*25c28e83SPiotr Jasiukajtis * Common Development and Distribution License (the "License").
6*25c28e83SPiotr Jasiukajtis * You may not use this file except in compliance with the License.
7*25c28e83SPiotr Jasiukajtis *
8*25c28e83SPiotr Jasiukajtis * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9*25c28e83SPiotr Jasiukajtis * or http://www.opensolaris.org/os/licensing.
10*25c28e83SPiotr Jasiukajtis * See the License for the specific language governing permissions
11*25c28e83SPiotr Jasiukajtis * and limitations under the License.
12*25c28e83SPiotr Jasiukajtis *
13*25c28e83SPiotr Jasiukajtis * When distributing Covered Code, include this CDDL HEADER in each
14*25c28e83SPiotr Jasiukajtis * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15*25c28e83SPiotr Jasiukajtis * If applicable, add the following below this CDDL HEADER, with the
16*25c28e83SPiotr Jasiukajtis * fields enclosed by brackets "[]" replaced with your own identifying
17*25c28e83SPiotr Jasiukajtis * information: Portions Copyright [yyyy] [name of copyright owner]
18*25c28e83SPiotr Jasiukajtis *
19*25c28e83SPiotr Jasiukajtis * CDDL HEADER END
20*25c28e83SPiotr Jasiukajtis */
21*25c28e83SPiotr Jasiukajtis
22*25c28e83SPiotr Jasiukajtis /*
23*25c28e83SPiotr Jasiukajtis * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
24*25c28e83SPiotr Jasiukajtis */
25*25c28e83SPiotr Jasiukajtis /*
26*25c28e83SPiotr Jasiukajtis * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
27*25c28e83SPiotr Jasiukajtis * Use is subject to license terms.
28*25c28e83SPiotr Jasiukajtis */
29*25c28e83SPiotr Jasiukajtis
30*25c28e83SPiotr Jasiukajtis #pragma weak fdim = __fdim
31*25c28e83SPiotr Jasiukajtis
32*25c28e83SPiotr Jasiukajtis /*
33*25c28e83SPiotr Jasiukajtis * fdim(x,y) returns x - y if x > y, +0 if x <= y, and NaN if x and
34*25c28e83SPiotr Jasiukajtis * y are unordered.
35*25c28e83SPiotr Jasiukajtis *
36*25c28e83SPiotr Jasiukajtis * fdim(x,y) raises overflow or inexact if x > y and x - y overflows
37*25c28e83SPiotr Jasiukajtis * or is inexact. It raises invalid if either operand is a signaling
38*25c28e83SPiotr Jasiukajtis * NaN. Otherwise, it raises no exceptions.
39*25c28e83SPiotr Jasiukajtis */
40*25c28e83SPiotr Jasiukajtis
41*25c28e83SPiotr Jasiukajtis #include "libm.h" /* for islessequal macro */
42*25c28e83SPiotr Jasiukajtis
43*25c28e83SPiotr Jasiukajtis double
__fdim(double x,double y)44*25c28e83SPiotr Jasiukajtis __fdim(double x, double y) {
45*25c28e83SPiotr Jasiukajtis if (islessequal(x, y)) {
46*25c28e83SPiotr Jasiukajtis x = 0.0;
47*25c28e83SPiotr Jasiukajtis y = -x;
48*25c28e83SPiotr Jasiukajtis }
49*25c28e83SPiotr Jasiukajtis return (x - y);
50*25c28e83SPiotr Jasiukajtis }
51