sc_vtb_bcopy
sc_vtb_bcopy(vtb1->vtb_buffer + from, vtb2->vtb_buffer + to,
sc_vtb_bcopy(vtb1->vtb_buffer + from, vtb2->vtb_buffer + to,
sc_vtb_bcopy(vtb1->vtb_buffer + from, vtb2->vtb_buffer + to,
sc_vtb_bcopy(vtb1->vtb_buffer + from,
sc_vtb_bcopy(vtb1->vtb_buffer + from,
sc_vtb_bcopy(vtb->vtb_buffer + from, vtb->vtb_buffer + to,
sc_vtb_bcopy(vtb->vtb_buffer + from, vtb->vtb_buffer + to,
sc_vtb_bcopy(vtb->vtb_buffer + at + count,
sc_vtb_bcopy(vtb->vtb_buffer + at + count,
sc_vtb_bcopy(vtb->vtb_buffer + at,
sc_vtb_bcopy(vtb->vtb_buffer + at,