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. 18, 2012
Filed:
Sep. 10, 2008
Hideki Matsuyama, Kanagawa, JP;
Masayuki Daitou, Kanagawa, JP;
Hideki Matsuyama, Kanagawa, JP;
Masayuki Daitou, Kanagawa, JP;
Renesas Electronics Corporation, Kawasaki-Shi, Kanagawa, JP;
Abstract
Provided is a microprocessor including a complex-MAC unit that operates in response to a complex-MAC instruction. The complex-MAC unit receives first and second complex data (each having 2-bit length) from a first register having a register length of at least 2bits, and also receives third and fourth complex data (each having 2-bit length) from a second register having a register length of at least 2bits, to calculate a sum of real parts or imaginary parts of a complex product of the first and third complex data and a complex product of the second and fourth complex data. The complex-MAC unit adds the obtained sum of the real parts or imaginary parts to a stored value of the third register, and overwrites the third register with the cumulative total value. The third register has a register length of at least 2+2 bits.