Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Patent
1998-03-31
2000-03-07
Mai, Tan V.
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
708518, G06F 752, G06F 738
Patent
active
06035318&
ABSTRACT:
A circuit for generating partial products for variable width multiplication operations is provided. According to an embodiment of the present invention, the circuit includes a plurality of partial product selector groups, each partial product selector group includes a plurality of partial product selector circuits. Each partial product selector circuit receives a portion of a multiplicand as an input and outputs a partial product. The circuit also includes a plurality of Booth encoders. At least one of the Booth encoders is coupled to each partial product selector group. Each Booth encoder receives as an input a portion of a wide multiplier and outputs a Booth encoded value to at least a portion of a partial product selector group. The circuit further includes an override circuit coupled to one or more of the partial product selector circuits. The override circuit is operable to control one or more of the partial product selector circuits to output a zero to thereby avoid unwanted cross-products when performing multiple smaller multiplications using the same circuit.
Abdallah Mohammad
Siers Scott
Intel Corporation
Mai Tan V.
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