LE_R1_BCNT_MASK
len = letoh32(sc->sc_rxdescs[i].rmd0) & LE_R1_BCNT_MASK;
len = letoh32(sc->sc_rxdescs[i].rmd2) & LE_R1_BCNT_MASK;
(LE_BCNT(MCLBYTES - 2) & LE_R1_BCNT_MASK)); \