Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Patent
1998-01-16
2000-05-09
Ngo, Chuong Dinh
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
708501, G06F 738
Patent
active
060617071
ABSTRACT:
An apparatus for generating an end-around carry to an end-around carry adder in a floating-point pipeline within a computer system is disclosed. The apparatus for generating an end-around carry includes a shift-comparison logic circuit, a sign-comparison circuit, and a logic gate. The shift-comparison logic circuit produces a shift-count signal and the sign-comparison logic circuit produces an effective operation signal. Coupled to the shift-comparison logic circuit and the sign-comparison logic circuit, the logic gate combines the shift-count signal and the effective operation signal with a carry-out signal generated by an end-around carry adder to provide an end-around carry signal for the end-around carry adder.
REFERENCES:
patent: 4969118 (1990-11-01), Montoye et al.
patent: 5040138 (1991-08-01), Maher, III
patent: 5241493 (1993-08-01), Chu et al.
patent: 5790445 (1998-08-01), Eisen et al.
patent: 5880983 (1999-03-01), Elliott et al.
Dibrino Michael Thomas
Karim Faraydon Osman
Dillon Andrew J.
International Business Machines - Corporation
Ng Antony P.
Ngo Chuong Dinh
Salys Casimer K.
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