Carry look ahead addition method and carry look ahead addition d

Details Carry look ahead addition method and carry look ahead addition d Carry look ahead addition method and carry look ahead addition d

1993-07-09

1995-12-19

Mai, Tan V.

Boots, shoes, and leggings

G06F 750

Patent

active

054774802

ABSTRACT:
A carry look ahead addition device includes a carry generation/propagation term generator which receives input of two numbers each having a length of n (positive integer) bits and generates the carry generation term and the carry propagation term for each bit, a carry generator which generates a carry for each bit based on the carry input and the carry generation term and the carry propagation term from the carry generation/propagation term generator, and a sum generator. The carry generator receives the carry input and, at the same time, the carry generation term and the carry propagation term are generated at the carry generation/propagation term generator. The carry generator deems the carry input as the carry generation term at the bit immediately below the least significant bit (Bit -1) and the carry propagation term at the Bit -1 to be 0 for processing without a carry input for n+1 bits so as to generate a carry having a length of n+1 bits.

REFERENCES:
patent: 5166899 (1992-11-01), Lamb
patent: 5276635 (1994-01-01), Naini et al.

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