ufs_rw16
reclen = ufs_rw16(de->d_reclen, needswap);
de.d_reclen = ufs_rw16(reclen, needswap);
dp->d_reclen = ufs_rw16(llen,needswap);
dp->d_reclen = ufs_rw16(dbuf->size - dbuf->cur, needswap);
(a) = ufs_rw16(ufs_rw16((a), (ns)) + (b), (ns))