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:
May. 09, 2006
Filed:
Feb. 09, 2004
Moshe B. Simon, San Ramon, CA (US);
Erik P. Machnicki, Sunnyvale, CA (US);
David A. Harrison, Cupertino, CA (US);
Rakesh K. Singh, Pune, IN;
Moshe B. Simon, San Ramon, CA (US);
Erik P. Machnicki, Sunnyvale, CA (US);
David A. Harrison, Cupertino, CA (US);
Rakesh K. Singh, Pune, IN;
Cradle Technologies, Inc., Sunnyvale, CA (US);
Abstract
A multiply accumulate unit ('MAC') that performs operations on packed integer data. In one embodiment, the MAC receives 2 32-bit data words which, depending on the specified mode of operation, each contain either four 8-bit operands, two 16-bit operands, or one 32-bit operand. Depending on the mode of operation, the MAC performs either sixteen 8×8 operations, four 16×16 operations, or one 32×32 operation. Results may be individually retrieved from registers and the corresponding accumulator cleared after the read cycle. In addition, the accumulators may be globally initialized. Two results from the 8×8 operations may be packed into a single 32-bit register. The MAC may also shift and saturate the products as required.