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:
Jul. 10, 1990
Filed:
Nov. 30, 1988
Timothy W Moline, Coon Rapids, MN (US);
Control Data Corporation, Minneapolis, MN (US);
Abstract
An overflow prediction scheme is provided to operate in parallel with an integer multiply within a computer to predict overflow conditions of the resultant register. The operands to be multiplied are examined to determine the position of the most significant bit. The position values are summed to determine a minimum resultant size. If the minimum resultant size exceeds the size of the data field of the resultant register, an overflow flag is set. If the minimum resultant size is less than the size of the resultant register data field, the overflow flag is not set. When the minimum resultant size equals the size of the resultant register data field, the setting of the overflow flag will depend on the signs of the expected and actual resultant.