Method and apparatus for exponent adder

Details Method and apparatus for exponent adder Method and apparatus for exponent adder

1991-04-03

1992-05-26

Mai, Tan V.

Boots, shoes, and leggings

G06F 738

Patent

active

051173840

ABSTRACT:
An apparatus and method for determining the difference between two exponents of two floating point numbers is disclosed. The exponent of each number is split into two portions. A high portion contains the most significant bits and a low portion contains the least significant bits. The number of bits in the low portion is related to the number of bits in the fraction portion of each floating point number. To determine differences that require a shift in one of the exponenets, one of the differences between the low portions of the exponents is selected based upon which of several conditions are found with respect to the difference between the high portion. Advantageously, a set of adders which are as wide as the number of bits in the low portion of each exponent are used.

REFERENCES:
patent: 4639887 (1987-01-01), Farmwald
patent: 4644490 (1987-02-01), Kobayashi
patent: 4807172 (1989-02-01), Nukiyama
patent: 4849921 (1989-07-01), Yasumoto et al.
patent: 4852039 (1989-07-01), Maheshwari
patent: 4858165 (1989-08-01), Gronowski et al.
patent: 4999800 (1991-03-01), Birger
patent: 4999803 (1991-03-01), Turrini et al.
Earle et al., Exponent Differences and Preshifter, IBM Technical Disclosure Bulletin, vol. 9, No. 7, Dec. 1966, pp. 848-849.

Affiliated with

Also associated with

Rating

Method and apparatus for exponent adder does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for exponent adder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for exponent adder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-424829