125c28e83SPiotr Jasiukajtis /*
225c28e83SPiotr Jasiukajtis * CDDL HEADER START
325c28e83SPiotr Jasiukajtis *
425c28e83SPiotr Jasiukajtis * The contents of this file are subject to the terms of the
525c28e83SPiotr Jasiukajtis * Common Development and Distribution License (the "License").
625c28e83SPiotr Jasiukajtis * You may not use this file except in compliance with the License.
725c28e83SPiotr Jasiukajtis *
825c28e83SPiotr Jasiukajtis * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
925c28e83SPiotr Jasiukajtis * or http://www.opensolaris.org/os/licensing.
1025c28e83SPiotr Jasiukajtis * See the License for the specific language governing permissions
1125c28e83SPiotr Jasiukajtis * and limitations under the License.
1225c28e83SPiotr Jasiukajtis *
1325c28e83SPiotr Jasiukajtis * When distributing Covered Code, include this CDDL HEADER in each
1425c28e83SPiotr Jasiukajtis * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
1525c28e83SPiotr Jasiukajtis * If applicable, add the following below this CDDL HEADER, with the
1625c28e83SPiotr Jasiukajtis * fields enclosed by brackets "[]" replaced with your own identifying
1725c28e83SPiotr Jasiukajtis * information: Portions Copyright [yyyy] [name of copyright owner]
1825c28e83SPiotr Jasiukajtis *
1925c28e83SPiotr Jasiukajtis * CDDL HEADER END
2025c28e83SPiotr Jasiukajtis */
2125c28e83SPiotr Jasiukajtis
2225c28e83SPiotr Jasiukajtis /*
2325c28e83SPiotr Jasiukajtis * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
2425c28e83SPiotr Jasiukajtis */
2525c28e83SPiotr Jasiukajtis /*
2625c28e83SPiotr Jasiukajtis * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
2725c28e83SPiotr Jasiukajtis * Use is subject to license terms.
2825c28e83SPiotr Jasiukajtis */
2925c28e83SPiotr Jasiukajtis
30ddc0e0b5SRichard Lowe #pragma weak __asinhl = asinhl
3125c28e83SPiotr Jasiukajtis
3225c28e83SPiotr Jasiukajtis #include "libm.h"
3325c28e83SPiotr Jasiukajtis
3425c28e83SPiotr Jasiukajtis static const long double
3525c28e83SPiotr Jasiukajtis ln2 = 6.931471805599453094172321214581765680755e-0001L,
3625c28e83SPiotr Jasiukajtis one = 1.0L,
3725c28e83SPiotr Jasiukajtis big = 1.0e+20L,
3825c28e83SPiotr Jasiukajtis tiny = 1.0e-20L;
3925c28e83SPiotr Jasiukajtis
4025c28e83SPiotr Jasiukajtis long double
asinhl(long double x)4125c28e83SPiotr Jasiukajtis asinhl(long double x) {
4225c28e83SPiotr Jasiukajtis long double t, w;
4325c28e83SPiotr Jasiukajtis #ifndef lint
44*862246c1SToomas Soome volatile long double dummy __unused;
4525c28e83SPiotr Jasiukajtis #endif
4625c28e83SPiotr Jasiukajtis
4725c28e83SPiotr Jasiukajtis w = fabsl(x);
4825c28e83SPiotr Jasiukajtis if (isnanl(x))
4925c28e83SPiotr Jasiukajtis return (x + x); /* x is NaN */
5025c28e83SPiotr Jasiukajtis if (w < tiny) {
5125c28e83SPiotr Jasiukajtis #ifndef lint
5225c28e83SPiotr Jasiukajtis dummy = x + big; /* inexact if x != 0 */
5325c28e83SPiotr Jasiukajtis #endif
5425c28e83SPiotr Jasiukajtis return (x); /* tiny x */
5525c28e83SPiotr Jasiukajtis } else if (w < big) {
5625c28e83SPiotr Jasiukajtis t = one / w;
5725c28e83SPiotr Jasiukajtis return (copysignl(log1pl(w + w / (t + sqrtl(one + t * t))), x));
5825c28e83SPiotr Jasiukajtis } else
5925c28e83SPiotr Jasiukajtis return (copysignl(logl(w) + ln2, x));
6025c28e83SPiotr Jasiukajtis }
61