Conditional-sum carry structure compiler

Details Conditional-sum carry structure compiler Conditional-sum carry structure compiler

1991-04-29

1992-06-30

Nguyen, Long T.

Boots, shoes, and leggings

G06F 750

Patent

active

051269651

ABSTRACT:
A conditional-sum carry structure has an architecture which is sufficiently regular that the structure can be conveniently generated by an automated compiler. The carry structure includes a column of input cells, each of the cells in the column being operative for receiving binary numbers and, for each of the received numbers, generating a sum bit and two carry-out bits. Further the carry structure includes an array of columns of binary logic elements comprised of dual multiplexers (MUX MUX elements), dual exclusive OR gates (XOR XOR elements), multiplexer and exclusive OR gate circuits (MUX XOR elements) and multiplexer units (ONE MUX elements) for receiving sum bits and carry-out bits from the input cells and for performing the operations of a conditional-sum carry structure.

REFERENCES:
patent: 4525797 (1985-06-01), Holden
patent: 4682303 (1987-07-01), Uya
patent: 4764888 (1988-08-01), Holden et al.

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