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glibc  2.9
w_atanhl.c
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00001 /* w_atanhl.c -- long double version of w_atanh.c.
00002  * Conversion to long double by Ulrich Drepper,
00003  * Cygnus Support, drepper@cygnus.com.
00004  */
00005 
00006 /*
00007  * ====================================================
00008  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
00009  *
00010  * Developed at SunPro, a Sun Microsystems, Inc. business.
00011  * Permission to use, copy, modify, and distribute this
00012  * software is freely granted, provided that this notice
00013  * is preserved.
00014  * ====================================================
00015  */
00016 
00017 #if defined(LIBM_SCCS) && !defined(lint)
00018 static char rcsid[] = "$NetBSD: $";
00019 #endif
00020 
00021 /*
00022  * wrapper atanhl(x)
00023  */
00024 
00025 #include <math.h>
00026 #include "math_private.h"
00027 
00028 
00029 #ifdef __STDC__
00030        long double __atanhl(long double x)       /* wrapper atanhl */
00031 #else
00032        long double __atanhl(x)                   /* wrapper atanhl */
00033        long double x;
00034 #endif
00035 {
00036 #ifdef _IEEE_LIBM
00037        return __ieee754_atanhl(x);
00038 #else
00039        long double z,y;
00040        z = __ieee754_atanhl(x);
00041        if(_LIB_VERSION == _IEEE_ || __isnanl(x)) return z;
00042        y = fabsl(x);
00043        if(y>=1.0) {
00044            if(y>1.0)
00045                return __kernel_standard(x,x,230); /* atanhl(|x|>1) */
00046            else
00047                return __kernel_standard(x,x,231); /* atanhl(|x|==1) */
00048        } else
00049            return z;
00050 #endif
00051 }
00052 weak_alias (__atanhl, atanhl)