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glibc  2.9
Functions
w_atanh.c File Reference
#include <math.h>
#include "math_private.h"
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Functions

double __atanh (double x)

Function Documentation

double __atanh ( double  x)

Definition at line 28 of file w_atanh.c.

{
#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
}

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