Floating point data processor and a method for performing a floa

Details Floating point data processor and a method for performing a floa Floating point data processor and a method for performing a floa

1993-11-01

1995-01-31

Mai, Tan V.

Boots, shoes, and leggings

364752, G06F 738

Patent

active

053863755

ABSTRACT:
A method and apparatus used for performing a floating pointing operation has the ability to calculate a square root of a number. An approximation to the inverse of the square root of the number is provided via a step (18). Steps (20 and 22) are used to improve the precision of the inverse of the square root until a predetermined precision is attained. The inverse of the square root, which has a predetermined precision, is used along with the number to generate both an exact floating point value and a small floating point value via steps (24 and 26). The exact and small floating point values are added together in a sum and manipulated to fit into the floating point representation available to the apparatus. The sum is a substantially close approximation to the square root of the number and is either output directly or slightly modified numerically to more accurately represent the square root of the number.

REFERENCES:
patent: 4939686 (1990-07-01), Fandrianto
patent: 5128891 (1992-07-01), Lynch et al.
patent: 5245564 (1993-09-01), Quek et al.
patent: 5293558 (1994-03-01), Narita et al.

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