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 1.2 2003/06/17 04:26:53 dillon Exp $
21 #include "math_private.h"
24 double acosh(double x) /* wrapper acosh */
26 double acosh(x) /* wrapper acosh */
31 return __ieee754_acosh(x);
34 z = __ieee754_acosh(x);
35 if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
37 return __kernel_standard(x,x,29); /* acosh(x<1) */