Carry-chain compiler

Details Carry-chain compiler Carry-chain compiler

1995-05-22

1996-02-20

Mai, Tan V.

Boots, shoes, and leggings

364788, G06F 750

Patent

active

054935253

ABSTRACT:
Carry-chain structures useful in circuits such as adders, subtractors, counters and arithmetic logic units (i.e., ALU's). The carry-chain structures have regular architectures that can be conveniently generated in various bit widths by automated compiler systems. In a preferred embodiment, a method for automatically generating a carry-chain circuit using a compiler which includes a library of cells by selecting a first cell from the library of cells for use as a carry propagation cell, and using the first cell for multiplexing a carry signal produced by the carry propagation cell, such that the carry-chain includes a plurality of first cells. Further, a carry-chain architecture is produced using the aforementioned method.

REFERENCES:
patent: 3553446 (1971-01-01), Kruy
patent: 4764887 (1988-08-01), Lai et al.
patent: 5018093 (1991-05-01), Shih
patent: 5027311 (1991-06-01), Zion
patent: 5043934 (1991-08-01), Lamb
patent: 5126965 (1992-06-01), Asato et al.

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