Fast approximate formation of function X power 2Y - is for floating point binary numbers and uses only shift register shift operations

摘要

The number is held in two adjacent memory sections with position values decreasing from left to right. The first section contains the two's complement exponent and the second the mantissa. Y is a whole positive or negative number. For positive and negative y respectively, the register contents are shifted y places left and right respectively apart from the leading mantissa location, the storage location of the leading mantissa position not being added in. The mantissa binary point retains its position, 'o' is inserted into each now vacant location to the right, and the exponent sign bit into each vacancy to the left.