FLOATING-POINT ADDER, SEMICONDUCTOR DEVICE, AND CONTROL METHOD OF FLOATING-POINT ADDER

摘要

PROBLEM TO BE SOLVED: To achieve a high speed for floating-point addition processing.SOLUTION: A floating-point adder includes a first register for storing a first fixed-point number of a predetermined digit corresponding to the accumulation result of a plurality of floating-point numbers, a first conversion part for converting an input first floating-point number into a second fixed-point number, a second register for storing the second fixed-point number, and an adder for adding together the second fixed-point number stored in the second register and the first fixed-point number stored in the first register to store the result of the addition as a first fixed-point number in the first register, and a second conversion part for converting the first fixed-point number into a second floating-point number to out it.SELECTED DRAWING: Figure 1