S_REGSELECT
#define V_REGSELECT(x) ((x) << S_REGSELECT)
#define G_REGSELECT(x) (((x) >> S_REGSELECT) & M_REGSELECT)
#define V_REGSELECT(x) ((x) << S_REGSELECT)
#define G_REGSELECT(x) (((x) >> S_REGSELECT) & M_REGSELECT)