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 #if defined(ELFOBJ) 31 #pragma weak fdim = __fdim 32 #endif 33 34 /* 35 * fdim(x,y) returns x - y if x > y, +0 if x <= y, and NaN if x and 36 * y are unordered. 37 * 38 * fdim(x,y) raises overflow or inexact if x > y and x - y overflows 39 * or is inexact. It raises invalid if either operand is a signaling 40 * NaN. Otherwise, it raises no exceptions. 41 */ 42 43 #include "libm.h" /* for islessequal macro */ 44 45 double 46 __fdim(double x, double y) { 47 if (islessequal(x, y)) { 48 x = 0.0; 49 y = -x; 50 } 51 return (x - y); 52 } 53