Function log

dnn/include/megdnn/dtype/bfloat16.hpp:1887–1889

Natural logorithm. \param arg function argument \return logarithm of \a arg to base e template typename enable ::type log(T arg) { return functions::log(arg); }

//		template<typename T> typename enable<expr,T>::type log(T arg) {
// return functions::log(arg); }
MEGDNN_HOST MEGDNN_DEVICE inline expr log(bfloat16 arg) {
    return functions::log(arg);
}
MEGDNN_HOST MEGDNN_DEVICE inline expr log(expr arg) {
    return functions::log(arg);
}