Method logb

dnn/include/megdnn/dtype/bfloat16.hpp:1228–1231

    /// \param arg number to query
    /// \return floating point exponent
    MEGDNN_HOST MEGDNN_DEVICE static bfloat16 logb(bfloat16 arg) {
        return bfloat16(binary_t(),
                        float2bfloat16<bfloat16::round_style>(std::logb(arg)));
    }

    /// Enumeration implementation.
    /// \param from number to increase/decrease