docs: public static double logcdf(double val, double loc, double scale) {
      val = (val - loc) / scale;
      if (val <= 18.) {
        return -FastMath.log1p(FastMath.exp(-val));
      } else if (val > 33.3) {
        return val;
      } else {
        return val - FastMath.exp(val);
      }
    }