fdim.c revision 25c28e83beb90e7c80452a7c818c5e6f73a07dc8
/*
* 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
* 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 2011 Nexenta Systems, Inc. All rights reserved.
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#if defined(ELFOBJ)
#endif
/*
* fdim(x,y) returns x - y if x > y, +0 if x <= y, and NaN if x and
* y are unordered.
*
* fdim(x,y) raises overflow or inexact if x > y and x - y overflows
* or is inexact. It raises invalid if either operand is a signaling
* NaN. Otherwise, it raises no exceptions.
*/
#include "libm.h" /* for islessequal macro */
double
__fdim(double x, double y) {
if (islessequal(x, y)) {
x = 0.0;
y = -x;
}
return (x - y);
}