IFM_TMASK
#define IFM_SUBTYPE(x) ((x) & IFM_TMASK)
IFM_TMASK,
IFM_TMASK,
#define IFM_ETHER_SUBTYPE(x) (((x) & IFM_TMASK) | \
#define IFM_ETHER_SUBTYPE_GET(x) ((x) & (IFM_TMASK|IFM_ETH_XTYPE))
(IFM_TYPE(x) == IFM_ETHER ? IFM_ETHER_SUBTYPE_GET(x) : ((x) & IFM_TMASK))
if ((mword & (IFM_NMASK|IFM_TMASK)) ==