a first adder configured to {HEAD ~ modulo} add {TAIL ~ the A register value} and an MD5 pre adder value, wherein the MD5 pre adder value comprises the modulo sum of an MD5 message segment and an MD5 constant value 
add
a first adder configured to { HEAD ~ modulo } add { TAIL ~ the A register value } and an MD5 pre adder value , wherein the MD5 pre adder value comprises the modulo sum of an MD5 message segment and an MD5 constant value
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH