Method and apparatus for generating an initial estimate for a fl

Details Method and apparatus for generating an initial estimate for a fl Method and apparatus for generating an initial estimate for a fl

1996-10-31

1998-12-08

Gordon, Paul P.

Boots, shoes, and leggings

364752, G06F 7552

Patent

active

058479791

ABSTRACT:
An initial estimate of a reciprocal of a square root of a floating point number is generated by subtracting the input floating point number from a constant and shifting the results to the right by one bit. Additionally, the initial estimate of a reciprocal of a square root of a floating point number can be determined by decrementing the exponent by one, shifting the exponent and fraction to the right by one bit, and subtracting the result from predetermined constant. The estimate for the reciprocal square root can also be determined by shifting the floating point number to the right by one bit and subtracting the shift result from a predetermined number to generate the initial estimate.

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