-#define Stat_Done(s) ((s&0x8000)!=0)
-#define Stat_Busy(s) ((s&0x4000)!=0)
-#define Stat_OK(s) ((s&0x2000)!=0)
-#define Stat_Abort(s) ((s&0x1000)!=0)
-#define Stat_STFail ((s&0x0800)!=0)
-#define Stat_TNoCar(s) ((s&0x0400)!=0)
-#define Stat_TNoCTS(s) ((s&0x0200)!=0)
-#define Stat_TNoDMA(s) ((s&0x0100)!=0)
-#define Stat_TDefer(s) ((s&0x0080)!=0)
-#define Stat_TColl(s) ((s&0x0040)!=0)
-#define Stat_TXColl(s) ((s&0x0020)!=0)
-#define Stat_NoColl(s) (s&0x000f)
+#define Stat_Done(s) (((s) & 0x8000) != 0)
+#define Stat_Busy(s) (((s) & 0x4000) != 0)
+#define Stat_OK(s) (((s) & 0x2000) != 0)
+#define Stat_Abort(s) (((s) & 0x1000) != 0)
+#define Stat_STFail (((s) & 0x0800) != 0)
+#define Stat_TNoCar(s) (((s) & 0x0400) != 0)
+#define Stat_TNoCTS(s) (((s) & 0x0200) != 0)
+#define Stat_TNoDMA(s) (((s) & 0x0100) != 0)
+#define Stat_TDefer(s) (((s) & 0x0080) != 0)
+#define Stat_TColl(s) (((s) & 0x0040) != 0)
+#define Stat_TXColl(s) (((s) & 0x0020) != 0)
+#define Stat_NoColl(s) ((s) & 0x000f)