The log memory is formed of a plurality of banks, and stores history information in the plurality of banks in {HEAD ~ a ring} like {TAIL ~ fashion} 
The log memory is formed of a plurality of banks , and stores history information in the plurality of banks in { HEAD ~ a ring } like { TAIL ~ fashion }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL