GEM_TXFLAG_VTAG_SHIFT
(((flag) & GEM_TXFLAG_VTAG) >> GEM_TXFLAG_VTAG_SHIFT)
(flag & GEM_TXFLAG_VTAG) >> GEM_TXFLAG_VTAG_SHIFT,
flag |= vtag << GEM_TXFLAG_VTAG_SHIFT;