PRODUCT-SUM OPERATION CIRCUIT

PROBLEM TO BE SOLVED: To continuously implement a product-sum operation of not only a fixed-size square matrix but also a different size matrix, and to further improve a use efficiency and an operation performance of a circuit. SOLUTION: A product-sum operation circuit includes: a multiplier of the predetermined quantity for implementing the accumulation of the row vector of a first matrix and the column vector of a second matrix in parallel; an adder for multiplier for obtaining and adding the multiplication result of the multiplier to the next stage of the multiplier provided in the quantity equal to the prdetermined one count; an adder for adder for obtaining and adding the added result of the adder for multiplier to the next stage of the adder for multiplier; a latency counter for measuring the latency of the final-stage adder for adder; and a variable counter for counting every measurement of the latency of the last stage adder for adder by the latency counter and outputting a signal expressing the state capable of obtaining the operation result of the matrix product when counting reaches the predetermined accumulated count; and a variable counter setting part for setting the count value of the variable counter. COPYRIGHT: (C)2010,JPO&INPIT