The processor 1, wherein {TAIL ~ said decrementing condition} is {HEAD ~ a drain} of an issued store 
The processor 1 , wherein { TAIL ~ said decrementing condition } is { HEAD ~ a drain } of an issued store
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH