Boots – shoes – and leggings
Patent
1992-01-31
1994-04-12
Nguyen, Long T.
Boots, shoes, and leggings
G06F 752
Patent
active
053031784
ABSTRACT:
A multiplying system based on the Booth's algorithm, comprises a Booth's decoder having a first input receiving a multiplier "Y" and a second input receiving a mode signal designating either a first multiplication of "X.times.Y" (where "X" is a multiplicand) or a second multiplication of "-X.times.Y". The Booth's decoder generates a Booth's decoded value and a sign selection signal to a partial product generation circuit which also receives the multiplicand "X", so that the partial product generation circuit generates either a first partial product of "X.times.Y" or a second partial product of "-X.times.Y" in accordance with the sign selection signal. An output of the partial product generation circuit is summed by a partial product summing circuit, and an output of the partial product summing circuit is added to a value "A" stored in an output register by an arithmetic unit. Thus, the accumulating multiplication "A=A.+-.X.times.Y" can be executed in the same hardware without using a circuit for sign-inverting the output of the partial product summing circuit.
REFERENCES:
patent: 4594678 (1986-06-01), Uhlenhoff
patent: 4813008 (1989-03-01), Shigehara et al.
patent: 4969118 (1990-11-01), Montoye et al.
NEC Corporation
Ngo C.
Nguyen Long T.
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