Arithmetic processor using signed-digit representation of extern

Details Arithmetic processor using signed-digit representation of extern Arithmetic processor using signed-digit representation of extern

1992-03-24

1993-04-27

Malzahn, David H.

Boots, shoes, and leggings

G06F 749

Patent

active

052068250

ABSTRACT:
This an arithmetic processor which represents internal arithmetic operands as signed-digit numbers, each digit of which may have either positive, zero, or negative values and which executes addition of a plurality of numbers each of whose most significant digit is offset with respect to the other numbers. The arithmetic processor includes an adder tree which is so constituted that a pair of said plurality of numbers are added to obtain a partial sum and further pairs of partial sums are successively added to obtain a final sum of all numbers. The arithmetic processor further comprises first means for adding a portion of the two numbers where both digits are present, second means for causing a lower order portion where only one of the numbers has a digit present to directly become part of the sum, third means for retaining or outputting a carry created by the first means, and fourth means for adding the carry created in each add stage of the adder tree to the later add stages of the adder tree to obtain the sum.

REFERENCES:
patent: 4230908 (1980-10-01), Davis et al.
patent: 4590584 (1986-05-01), Yaguchi et al.
patent: 4628472 (1986-12-01), Fensch
patent: 4638449 (1987-01-01), Frey
patent: 4791601 (1988-12-01), Tanaka
patent: 4811270 (1989-03-01), Nash
patent: 4864528 (1989-09-01), Nishiyama et al.
Avizienis, "Binary-Compatible Signed-Digit Arithmetic" Processings-Fall Joint Computer Conf. 1964, pp. 663-672.
Hwung, Computer Arithmetic, Principles, Architecture & Design John Wiley & Sons 1979 pp. 149-151.

Affiliated with

Also associated with

Rating

Arithmetic processor using signed-digit representation of extern does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Arithmetic processor using signed-digit representation of extern, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arithmetic processor using signed-digit representation of extern will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2333104