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:
Sep. 14, 2004
Filed:
Aug. 02, 2001
Takahiro Kumura, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An object of the present invention is to provide a multiply-accumulate unit with a rounding function which is capable of effecting 16-bit multiply-accumulate operations taking into account the position of an addend in a register. The multiply-accumulate unit with the rounding function has a selection inputting and expanding means for expanding an addend from 31st-16th bits of 40-bit register into 40-bit data and transmitting the 40-bit data to MAC (multiply-accumulate) unit if control signal Position from an external source is “1”, and expanding an addend from 15th-0th bits of 40-bit register into 40-bit data and transmitting the 40-bit data to MAC unit if control signal Position is “0”. MAC unit performs a multiply-accumulate operation on the 40-bit data, 16-bit data multiplicand B, and multiplier C. Rounding and selection outputting means rounds off the result of the multiply-accumulation operation into 16-bit data if control signal Round from an external source is “1”, and outputs the rounded data to the position of the addend in the 40-bit register , where the position is indicated by control signal Position.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile