atomic_readandclear_64
#define atomic_readandclear_long atomic_readandclear_64
#define atomic_readandclear_ptr atomic_readandclear_64
status = atomic_readandclear_64(&sc->sc_interrupt_status);
bitmap = atomic_readandclear_64(&sc->bitmap_thread0[0]);
bitmap = atomic_readandclear_64(&sc->bitmap_thread1[0]);
#define atomic_readandclear_long atomic_readandclear_64
#define atomic_readandclear_ptr atomic_readandclear_64
void atomic_readandclear_64(volatile u_int64_t *);