-#define AT91_PMC_PLLXR_DIV(x) (x & 0xFF)
-#define AT91_PMC_PLLXR_PLLCOUNT(x) ((x & 0x3F) << 8)
-#define AT91_PMC_PLLXR_OUT(x) ((x & 0x03) << 14)
+#define AT91_PMC_PLLXR_DIV(x) ((x) & 0xFF)
+#define AT91_PMC_PLLXR_PLLCOUNT(x) (((x) & 0x3F) << 8)
+#define AT91_PMC_PLLXR_OUT(x) (((x) & 0x03) << 14)