Patent ID: 6578060
Filing Date: 2003-06-10
Classification: G06F

Abstract:
A floating-point calculation apparatus for performing a calculation of operands in floating-point representation including an exponent value and a fraction value, comprising:a subtractor for subtracting exponent values of first and second operands; an inverting circuit for inverting an output value from said subtractor; a first selection circuit for selecting one of said output value from said subtractor and an output value from said inverting circuit in accordance with an indication signal indicating which of the exponent values of said first and second operands is greater, for producing an absolute value of difference for right-shifting of a fraction value; a second selection circuit for selecting one of the fraction values of said first and second operands in accordance with said indication signal; and right-shift circuitry for right-shifting an output value of said second selection circuit in accordance with an output value of said first selection circuit and said indication signal.