MGE_UCAST_REG_NUMBER
reg_idx = last_byte / MGE_UCAST_REG_NUMBER;
reg_off = (last_byte % MGE_UCAST_REG_NUMBER) * 8;
for (i = 0; i < MGE_UCAST_REG_NUMBER; i++) {
for (i = 0; i < MGE_UCAST_REG_NUMBER; i++)