Nonrestoring divider

Details Nonrestoring divider Nonrestoring divider

G - Physics

06

F

354/167

G06F 7/52 (2006.01) G06F 7/49 (2006.01)

Patent

CA 1231455

NONRESTORING DIVIDER ABSTRACT OF THE DISCLOSURE Disclosed is a divider apparatus which includes a divisor register for setting a divisor, a partial remainder register for setting a dividend or a partial remainder, a predictor for predicting a partial quotient, a multiplier for multiplying the content of the divisor register, and a first adder for subtracting the output of the multiplier from the content of the partial remainder register and for calculating the partial remainder. According to the present invention, the divider apparatus further includes a second adder for determining the difference between the upper digits of the multiplier and the upper digits of the partial reminder register, a first predictor for predicting the partial quotient from the output of the first adder and the upper digits of the divisor register, a second predictor for predicting the partial quotient in the third cycle from a corrected output of the second adder and the digits of the divisor register, a first element for determining the carry to be propagated to the second adder from remainder digits of the multiplier and remainder digits of the partial remainder register, and a second element or selecting either output of the first predicting circuit or the second predictor my using the output of the second element.

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