VR_F_RESTART
sc->vr_flags |= VR_F_RESTART;
if ((sc->vr_flags & VR_F_RESTART) != 0) {
sc->vr_flags &= ~VR_F_RESTART;
sc->vr_flags |= VR_F_RESTART;
(sc->vr_flags & VR_F_RESTART) != 0) {
sc->vr_flags |= VR_F_RESTART;
sc->vr_flags |= VR_F_RESTART;
sc->vr_flags |= VR_F_RESTART;