Patent ID: 6010063
Filing Date: 2000-01-04
Classification: G06F

Abstract:
A multiplying method with a round-off function and applicable to a multiplier or a product sum calculator, the method comprising the steps ofgenerating a product from two binary numbersrounding the product, if an uppermost one of bits of the product to be rounded is a ONE while the bits lower than the uppermost bit are ZEROs and if the product is positive, to a value greater than, but nearest to, the product and which can be expressed, and rounding the product, if the product is negative, to a value smaller than, but nearest to, the product and which can be expressed;rounding the product, if the product is greater than a value having a ONE at the uppermost one of the bits to be rounded and ZEROs at the bits lower than the uppermost bit, to a value greater than, but nearest to, the product and which can be expressed and without regard to a sign of the product, and rounding the product, if the product is smaller than said value having a ONE at the uppermost one of the its to be rounded and ZEROs at the bits lower than the uppermost bit, and without regard to the sign of the product, to a value smaller than, but nearest to, the product and which can be expressed.