func internal/runtime/atomic.Xchg64

3 uses

	internal/runtime/atomic (current package)
		atomic_amd64.go#L67: func Xchg64(ptr *uint64, new uint64) uint64
		types.go#L333: 	return Xchg64(&u.value, value)

	runtime
		runtime1.go#L134: 	if atomic.Xchg64(&test_z64, (3<<40)+3) != (2<<40)+2 {