mask_nbit_l
mask_nbit_l(u);
mask_nbit_l(u); /* Mask normalization bit if applicable. */
mask_nbit_l(u);
mask_nbit_l(u[0]);
mask_nbit_l(u[1]);
mask_nbit_l(u[0]);
mask_nbit_l(u[1]);
mask_nbit_l(u[0]);
mask_nbit_l(u[1]);
mask_nbit_l(u[0]);
mask_nbit_l(u[1]);
mask_nbit_l(u);
mask_nbit_l(ux);