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[glibc.git] / math / w_atanhl.c
blob5ce53b847d7eb1967bda39bf800fd29e5f63782e
1 /* w_atanhl.c -- long double version of w_atanh.c.
2 * Conversion to long double by Ulrich Drepper,
3 * Cygnus Support, drepper@cygnus.com.
4 */
6 /*
7 * ====================================================
8 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
10 * Developed at SunPro, a Sun Microsystems, Inc. business.
11 * Permission to use, copy, modify, and distribute this
12 * software is freely granted, provided that this notice
13 * is preserved.
14 * ====================================================
17 #if defined(LIBM_SCCS) && !defined(lint)
18 static char rcsid[] = "$NetBSD: $";
19 #endif
22 * wrapper atanhl(x)
25 #include <math.h>
26 #include "math_private.h"
29 #ifdef __STDC__
30 long double __atanhl(long double x) /* wrapper atanhl */
31 #else
32 long double __atanhl(x) /* wrapper atanhl */
33 long double x;
34 #endif
36 #ifdef _IEEE_LIBM
37 return __ieee754_atanhl(x);
38 #else
39 long double z,y;
40 z = __ieee754_atanhl(x);
41 if(_LIB_VERSION == _IEEE_ || __isnanl(x)) return z;
42 y = fabsl(x);
43 if(y>=1.0) {
44 if(y>1.0)
45 return __kernel_standard(x,x,230); /* atanhl(|x|>1) */
46 else
47 return __kernel_standard(x,x,231); /* atanhl(|x|==1) */
48 } else
49 return z;
50 #endif
52 weak_alias (__atanhl, atanhl)