A computer readable storage medium having stored thereon sequences of {HEAD ~ instruction} including {TAIL ~ instructions} that cause a processor to: 
A computer readable storage medium having stored thereon sequences of { HEAD ~ instruction } including { TAIL ~ instructions } that cause a processor to :
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH