Floating point arithmetic unit using modified Newton-Raphson technique for division and square root
Patent 5341321 Issued on August 23, 1994. Estimated Expiration Date: 
May 5, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 5, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesFloating point operation unit in division and square root operations Floating point arithmetic two cycle data flow Method and apparatus for performing mathematical functions using polynomial approximation and a rectangular aspect ratio multiplier Machine method to perform newton iterations for reciprocal square roots Machine method to perform newton iterations for reciprocals Patent #: 5220524 InventorsApplicationNo. 058164 filed on 05/05/1993US Classes:708/500, Evaluation of root708/504DivisionExaminersPrimary: Mai, Tan V.Foreign Patent References
International ClassG06F 007/38AbstractA floating point processing system which uses a multiplier unit and an adder unit to perform floating point division and square root operations using both a conventional and a modified form of the Newton-Raphson method. The modified form of the Newton-Raphson method is used in place of the final iteration of the conventional Newton-Raphson so as to compute high precision approximated results with a substantial improvement in speed. The invention computes approximated results faster and simplifies hardware requirements because no multiplications of numbers of the precision of the result are required.Other References
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