IH_WPTR_OVERFLOW_CLEAR
# define IH_WPTR_OVERFLOW_CLEAR (1 << 31)
# define IH_WPTR_OVERFLOW_CLEAR (1 << 31)
# define IH_WPTR_OVERFLOW_CLEAR (1 << 31)
# define IH_WPTR_OVERFLOW_CLEAR (1 << 31)
# define IH_WPTR_OVERFLOW_CLEAR (1 << 31)