1 /* @(#)w_atanh.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 * ====================================================
14 static char rcsid[] = "$FreeBSD$";
22 #include "math_private.h"
26 atanh(double x) /* wrapper atanh */
29 return __ieee754_atanh(x);
32 z = __ieee754_atanh(x);
33 if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
37 return __kernel_standard(x,x,30); /* atanh(|x|>1) */
39 return __kernel_standard(x,x,31); /* atanh(|x|==1) */