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 __asinhl = asinhl 31 32 #include "libm.h" 33 34 static const long double 35 ln2 = 6.931471805599453094172321214581765680755e-0001L, 36 one = 1.0L, 37 big = 1.0e+20L, 38 tiny = 1.0e-20L; 39 40 long double 41 asinhl(long double x) { 42 long double t, w; 43 #ifndef lint 44 volatile long double dummy __unused; 45 #endif 46 47 w = fabsl(x); 48 if (isnanl(x)) 49 return (x + x); /* x is NaN */ 50 if (w < tiny) { 51 #ifndef lint 52 dummy = x + big; /* inexact if x != 0 */ 53 #endif 54 return (x); /* tiny x */ 55 } else if (w < big) { 56 t = one / w; 57 return (copysignl(log1pl(w + w / (t + sqrtl(one + t * t))), x)); 58 } else 59 return (copysignl(logl(w) + ln2, x)); 60 } 61