+/* Debug and printf string expansion helpers for printing bitfields */
+#define BIT_FMT8 "%c%c%c%c-%c%c%c%c"
+#define BIT_FMT16 BIT_FMT8 ":" BIT_FMT8
+#define BIT_FMT32 BIT_FMT16 " " BIT_FMT16
+
+#define BITC(x,y) (((x>>y)&1)?'1':'0')
+#define BIT_ARG8(x) \
+BITC(x,7),BITC(x,6),BITC(x,5),BITC(x,4),\
+BITC(x,3),BITC(x,2),BITC(x,1),BITC(x,0)
+
+#define BIT_ARG16(x) \
+BITC(x,15),BITC(x,14),BITC(x,13),BITC(x,12),\
+BITC(x,11),BITC(x,10),BITC(x,9),BITC(x,8),\
+BIT_ARG8(x)
+
+#define BIT_ARG32(x) \
+BITC(x,31),BITC(x,30),BITC(x,29),BITC(x,28),\
+BITC(x,27),BITC(x,26),BITC(x,25),BITC(x,24),\
+BITC(x,23),BITC(x,22),BITC(x,21),BITC(x,20),\
+BITC(x,19),BITC(x,18),BITC(x,17),BITC(x,16),\
+BIT_ARG16(x)
+
+