PLL1031X_SDIV_MASK
sdiv = (pll_con0 >> PLL1031X_SDIV_SHIFT) & PLL1031X_SDIV_MASK;
con0 &= ~(PLL1031X_SDIV_MASK << PLL1031X_SDIV_SHIFT);
(PLL1031X_SDIV_MASK << PLL1031X_SDIV_SHIFT));