Katten Muchin Rosenman LLP
Processor having ALU with dynamically transparent pipeline stages
An arithmetic-logic unit for performing an operation of a prescribed bit length in an execution stage of a processor includes a plurality of sub-arithmetic-logic units which perform in respectively different pipeline stages sub-operations created by decomposing the operation of the prescribed bit length in a bit length direction, and a plurality of pipeline registers provided so as to separate the pipeline stages from each other, wherein each of the pipeline registers operates in such a manner as to be switchable between two operation modes, a flip-flop mode in which an output value is updated in synchronism with an input trigger and a transparent mode in which an input value is directly output.
Fujitsu Limited
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G06F G06F G06F G06F
inventional inventional inventional inventional
Hideki
Yoshizawa