MF
#define MF(_v, _f) ( !! ((_v) & (_f)))
#define MF(_v, _f) ( !! ((_v) & (_f)))
#define MF(_v, _f) ( !! ((_v) & (_f)))
#define MF(_v, _f) ( !! ((_v) & (_f)))
#define MF(_v, _f) ( !! ((_v) & (_f)))
#define MF(_v, _f) ( !! ((_v) & (_f)))