If the exponent of the first operand is larger than the exponent of {HEAD ~ the second operand}, {TAIL ~ the mantissa} of the second operand which is currently stored in MQ register 13 is transferred to the B register 11 
If the exponent of the first operand is larger than the exponent of { HEAD ~ the second operand } , { TAIL ~ the mantissa } of the second operand which is currently stored in MQ register 13 is transferred to the B register 11
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH 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