1 /* @(#)w_acosh.c 5.1 93/09/24 */
3 * ====================================================
4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
6 * Developed at SunPro, a Sun Microsystems, Inc. business.
7 * Permission to use, copy, modify, and distribute this
8 * software is freely granted, provided that this notice
10 * ====================================================
12 * $FreeBSD: src/lib/msun/src/w_acosh.c,v 1.5 1999/08/28 00:06:57 peter Exp $
13 * $DragonFly: src/lib/msun/src/Attic/w_acosh.c,v 1.3 2004/12/29 15:22:57 asmodai Exp $
21 #include "math_private.h"
24 acosh(double x) /* wrapper acosh */
27 return __ieee754_acosh(x);
30 z = __ieee754_acosh(x);
31 if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
33 return __kernel_standard(x,x,29); /* acosh(x<1) */