PLL_DITH_FDBK_M_MASK
num *= (val >> PLL_DITH_FDBK_M_SHIFT) & PLL_DITH_FDBK_M_MASK;
val &= ~(PLL_DITH_FDBK_M_MASK << PLL_DITH_FDBK_M_SHIFT);
val |= (rtbl[i].m & PLL_DITH_FDBK_M_MASK) <<