lshift_bits
if ((res = lshift_bits(&x, norm, &x)) != MP_OKAY) {
if ((res = lshift_bits(&y, norm, &y)) != MP_OKAY) {
if ((res = lshift_bits(&w0, 3, &tmp1)) != MP_OKAY) {
if ((res = lshift_bits(&w4, 3, &tmp1)) != MP_OKAY) {
if ((res = lshift_bits(&w0, 3, &tmp1)) != MP_OKAY) {
if ((res = lshift_bits(&w4, 3, &tmp1)) != MP_OKAY) {
if ((res = lshift_bits(a, 8, a)) != MP_OKAY) {
if ((res = lshift_bits(&u, k, c)) != MP_OKAY) {