Method log2

samples/common/half.h:1828–1835

Binary logarithm 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 log2(float arg)
    {
#if HALF_ENABLE_CPP11_CMATH
        return expr(std::log2(arg));
#else
        return expr(static_cast<float>(std::log(static_cast<double>(arg)) * 1.4426950408889634073599246810019));
#endif
    }

    /// Square root implementation.
    /// \param arg function argument