53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
/* @(#)w_atanh.c 5.1 93/09/24 */
|
|
/*
|
|
* ====================================================
|
|
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|
*
|
|
* Developed at SunPro, a Sun Microsystems, Inc. business.
|
|
* Permission to use, copy, modify, and distribute this
|
|
* software is freely granted, provided that this notice
|
|
* is preserved.
|
|
* ====================================================
|
|
*/
|
|
|
|
#if defined(LIBM_SCCS) && !defined(lint)
|
|
static char rcsid[] = "$NetBSD: w_atanh.c,v 1.6 1995/05/10 20:48:43 jtc Exp $";
|
|
#endif
|
|
|
|
/*
|
|
* wrapper atanh(x)
|
|
*/
|
|
|
|
#include <math.h>
|
|
#include "math_private.h"
|
|
|
|
|
|
#ifdef __STDC__
|
|
double __atanh(double x) /* wrapper atanh */
|
|
#else
|
|
double __atanh(x) /* wrapper atanh */
|
|
double x;
|
|
#endif
|
|
{
|
|
#ifdef _IEEE_LIBM
|
|
return __ieee754_atanh(x);
|
|
#else
|
|
double z,y;
|
|
z = __ieee754_atanh(x);
|
|
if(_LIB_VERSION == _IEEE_ || __isnan(x)) return z;
|
|
y = fabs(x);
|
|
if(y>=1.0) {
|
|
if(y>1.0)
|
|
return __kernel_standard(x,x,30); /* atanh(|x|>1) */
|
|
else
|
|
return __kernel_standard(x,x,31); /* atanh(|x|==1) */
|
|
} else
|
|
return z;
|
|
#endif
|
|
}
|
|
weak_alias (__atanh, atanh)
|
|
#ifdef NO_LONG_DOUBLE
|
|
strong_alias (__atanh, __atanhl)
|
|
weak_alias (__atanh, atanhl)
|
|
#endif
|