Dynamically reconfigurable stages pipelined datapath with data valid signal controlled multiplexer

A pipelined datapath with dynamically reconfigurable pipeline stages, comprising:

• a pipeline controller for receiving a system clock and a valid data signal to generate N+1 clock signals according to the system clock and the valid data signal and to generate N−1 select signals according to the valid data signal, where N is an integer greater than 1;
• an input register coupled to the pipeline controller, for receiving one of the clock signals and selectively receiving a datum according to the received clock signal;
• and N pipeline stages, coupled in series, wherein a first pipeline stage of the pipeline stages is coupled to an output terminal of the input register, and each of the pipeline stages includes:
• a combinational logic circuit for processing the datum;
• and a register for receiving one of the clock signal and selectively latching an output of the combination logic circuit according to the received clock signal;
• wherein each of the first to a (N−1)th pipeline stages further includes:
• a multiplexer for receiving one of the select signals, and selectively outputting the datum from one of the combinational logic circuit and the register into the combinational logic circuit of a next pipeline stage according to the received select signals.