Beispiel #1
0
__complex__ double
__ctanh (__complex__ double x)
{
  __complex__ double res;

  if (__builtin_expect (!isfinite (__real__ x) || !isfinite (__imag__ x), 0))
    {
      if (__isinf_ns (__real__ x))
	{
	  __real__ res = __copysign (1.0, __real__ x);
	  __imag__ res = __copysign (0.0, __imag__ x);
	}
      else if (__imag__ x == 0.0)
	{
	  res = x;
	}
      else
	{
	  __real__ res = __nan ("");
	  __imag__ res = __nan ("");

	  if (__isinf_ns (__imag__ x))
	    feraiseexcept (FE_INVALID);
	}
    }
  else
    {
      double sin2ix, cos2ix;
      double den;

      __sincos (2.0 * __imag__ x, &sin2ix, &cos2ix);

      den = (__ieee754_cosh (2.0 * __real__ x) + cos2ix);

      if (den == 0.0)
	{
	  __complex__ double ez = __cexp (x);
	  __complex__ double emz = __cexp (-x);

	  res = (ez - emz) / (ez + emz);
	}
      else
	{
	  __real__ res = __ieee754_sinh (2.0 * __real__ x) / den;
	  __imag__ res = sin2ix / den;
	}
    }

  return res;
}
Beispiel #2
0
__complex__ double
__cpow (__complex__ double x, __complex__ double c)
{
  return __cexp (c * __clog (x));
}
Beispiel #3
0
complex c_exp_(complex *z)
{
  return __cexp(z->real, z->imag);
}