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. 07, 2001
Filed:
Nov. 18, 1998
Anthony M. Petro, Austin, TX (US);
James S. Blomgren, Austin, TX (US);
Intrinsity, Inc., Austin, TX (US);
Abstract
An apparatus and method that perform partitionable carry-lookahead logic on two N-nary operands. The operands may be selectably partitioned into 8-bit, 16-bit, 32-bit, or 64-bit operands. The present invention performs carry-lookahead logic to calculate a block carry-lookahead indicator for a grouping, or block, of bits. The present invention forces the block indicator to a “Halt” value if the block comprises the most significant block within a partition, thus interrupting the carry propagation chain on partition boundaries. The present invention supports interruption of the carry propagation chain for both addition and subtraction.