DRF_HW_IDX
(o)[DRF_HW_IDX((o),drf)] = DRF_HW_SET((o),drf,(v)); \
#define DRF_MW_SPANS(o,drf) (DRF_LW_IDX((o),drf) != DRF_HW_IDX((o),drf))
#define DRF_HW_GET(o,drf) ((o)[DRF_HW_IDX(o,drf)] & DRF_HW_SMASK((o),drf))
#define DRF_HW_CLR(o,drf) ((o)[DRF_HW_IDX((o),drf)] & ~DRF_HW_SMASK((o),drf))