The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 04, 1981
Filed:
Jun. 04, 1979
Applicant:
Inventor:
Wilson T Wong, Anaheim, CA (US);
Assignee:
Sperry Rand Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364748 ;
Abstract
There is provided a circuit and method for subtracting floating point numbers which are represented by binary bits. In this circuit, the smaller number (minuend) in one register is arranged so that the complement thereof is denormalized and added to the subtrahend (i.e. larger number) and the result of the addition is returned to the original register. At that time, the signal stored in the register is renormalized. In this circuit, the number of guard bits required to guarantee round off accuracy is only two.