Processor with scaled sum-of-product instructions

Details Processor with scaled sum-of-product instructions Processor with scaled sum-of-product instructions

2003-01-22

2009-08-25

Malzahn, David H (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

07580968

ABSTRACT:
A method of performing a scaled sum-of-product operation in a processor in response to multiply-and-accumulate (MAC) instructions. The method includes accessing a first number, accessing a second number, and accessing a shift value. The first number is multiplied by the second number, the resulting product comprising a third number that includes a most significant portion and a least significant portion. The method includes executing a first MAC instruction, executing a second MAC instruction, and storing a final result of the scaled sum-of-product operation. Executing the first MAC instruction comprises right-shifting the least significant portion of the third number according to the shift value; accessing a least significant portion of a fourth number; and adding the right-shifted least significant portion of the third number to the least significant portion of the fourth number, the resulting sum comprising a least significant portion of the final result of the scaled sum-of-product operation.

REFERENCES:
patent: 5764557 (1998-06-01), Hara et al.
patent: 6233596 (2001-05-01), Kubota et al.
patent: 6370558 (2002-04-01), Guttag et al.
patent: 6496920 (2002-12-01), Zou et al.
patent: 6581086 (2003-06-01), Morrison et al.
TMS320C28X DSP CPU and Instruction Set Reference Guide, Aug. 2001, pp. 1-695, Texas Instruments, Inc., U.S.A.

Affiliated with

Also associated with

Rating

Processor with scaled sum-of-product instructions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Processor with scaled sum-of-product instructions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Processor with scaled sum-of-product instructions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4060520