Method atanh

samples/common/half.h:1995–2002

Hyperbolic area tangent implementation. \param arg function argument \return function value stored in single-preicision

    /// \param arg function argument
    /// \return function value stored in single-preicision
    static expr atanh(float arg)
    {
#if HALF_ENABLE_CPP11_CMATH
        return expr(std::atanh(arg));
#else
        return expr(static_cast<float>(0.5 * std::log((1.0 + arg) / (1.0 - arg))));
#endif
    }

    /// Error function implementation.
    /// \param arg function argument