S_TIMERBACKOFFINDEX12
#define V_TIMERBACKOFFINDEX12(x) ((x) << S_TIMERBACKOFFINDEX12)
#define G_TIMERBACKOFFINDEX12(x) (((x) >> S_TIMERBACKOFFINDEX12) & M_TIMERBACKOFFINDEX12)
#define V_TIMERBACKOFFINDEX12(x) ((x) << S_TIMERBACKOFFINDEX12)
#define G_TIMERBACKOFFINDEX12(x) (((x) >> S_TIMERBACKOFFINDEX12) & M_TIMERBACKOFFINDEX12)