S_TIMERBACKOFFINDEX2
#define V_TIMERBACKOFFINDEX2(x) ((x) << S_TIMERBACKOFFINDEX2)
#define G_TIMERBACKOFFINDEX2(x) (((x) >> S_TIMERBACKOFFINDEX2) & M_TIMERBACKOFFINDEX2)
#define V_TIMERBACKOFFINDEX2(x) ((x) << S_TIMERBACKOFFINDEX2)
#define G_TIMERBACKOFFINDEX2(x) (((x) >> S_TIMERBACKOFFINDEX2) & M_TIMERBACKOFFINDEX2)