{HEAD ~ The mask} generated from the most significant bits section of the pointer includes {TAIL ~ bits} corresponding to various regions of the output mask 
{ HEAD ~ The mask } generated from the most significant bits section of the pointer includes { TAIL ~ bits } corresponding to various regions of the output mask
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH