1. An electronic computer comprising: a processor for execution of arithmetic and logic instructions and including a multiplication circuit for multiplication of data values, the multiplication circuit: (i) receiving a first and second operand, the first operand having a hit length of n bits; (ii) selecting a first subset operand from the first operand of bit length m less than n, the first subset operand selected from the first operand according to a position of a leading non-sign bit in the first operand; and (iii) providing an output equal to a product between the subset operand and the second operand.