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System and method for rearranging bits of a data word in accordance with a mask using sorting

Image Number 4 for United States Patent #6618804.

A system is disclosed for rearranging data units of a data word in accordance with a mask word, the mask word having a plurality of mask bits each associated with a data unit, each mask bit having one of a set condition and a clear condition. The system includes an array of interconnected swap modules organized in a series of swap stages, each swap module having two inputs and two outputs. Each swap module is configured to receive at each input a data unit and associated mask bits and couple the data units to the respective outputs in relation to the associated mask bit's condition.

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