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, 2012
Filed:
Jan. 05, 2009
Steven R. Carlough, Poughkeepsie, NY (US);
Wilhelm E. Haller, Remshalden, DE;
Wen H. LI, Poughkeepsie, NY (US);
Eric M. Schwarz, Gardiner, NY (US);
Steven R. Carlough, Poughkeepsie, NY (US);
Wilhelm E. Haller, Remshalden, DE;
Wen H. Li, Poughkeepsie, NY (US);
Eric M. Schwarz, Gardiner, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method for implementing an adder including receiving a first and second operand. A sum of one or more corresponding digits from the first operand and the second operand is calculated. The calculating is performed by a plurality of adder blocks. Output from the calculating includes the sum of the corresponding digits and a carry out indicator for the corresponding digits. The sums of the corresponding digits and the carry out indicators in a carry chain are stored in an intermediate result register. Each of the sums in the intermediate result register is incremented by one. A selection between each of the sums and the sums incremented by one is performed. Input to the selecting includes the carry chain, and the output from the selecting includes a final sum of the first operand and the second operand. The final sum is stored in an output register.