APPARATUS FOR MULTIPLY ADD FUSED UNIT OF FLOATING POINT NUMBER, AND METHOD THEREOF

摘要

PURPOSE: A complex calculation apparatus with floating point numbers and a calculation method thereof are provided to minimize power consumption by omitting unnecessary calculations. CONSTITUTION: A partial product generator(110) calculates a partial product by dividing the mantissa of first and second floating point values in n-bit unit and adds the partial products to output single partial product sum and carry. A carry storage adder(120) creates first bit partial product sum and carry by adding the partial product sum and carry with the lowermost bit of the mantissa of a third floating point value. A carry select adder(130) creates mantissa presented in a second bit by adding the first bit partial product sum and carry with the uppermost bit of the mantissa of the third floating point value.