BT_D4M3            39 dev/sbus/cgsixreg.h #define	BT_D4M3(x)	((((x) >> 2) << 1) + ((x) >> 2)) /* (x / 4) * 3 */
BT_D4M3            83 dev/sbus/cgthree.c #define	BT_D4M3(x)	((((x) >> 2) << 1) + ((x) >> 2)) /* (x / 4) * 3 */