Multi-port—multi mode Reed Solomon decoder

A forward error correction (FEC) method in a multi-port, multi-mode system, the method comprising:

• receiving at a syndrome (SDM) slice within a SDM block data to be decoded, a first signal corresponding to a port width, a second signal corresponding to Reed Solomon (RS) FEC mode, the port width providing information a port with the data to be decoded and the RS FEC mode providing a code word, the SDM slice determining whether there is an error in the received data to be decoded by outputting a non-zero value signal in response to a determined error, each SDM slice generating an SDM slice output;
• and
• processing the SDM slice outputs by a switching logic, the switching logic comprising one or more adders and one or more multiplexers, the processing comprising:
• receiving by the one or more adders, SDM slice outputs as inputs to combine the received SDM slice outputs into combined SDM slice outputs;
• and
• receiving by the one or more multiplexers, an IFW signal and the combined SDM slice outputs as inputs to select one or more combined SDM slice outputs based on the value of the IFW signal, the selected one or more combined SDM slice outputs provided as inputs to a reformulated inversionless Berlekamp-Massey (RiBM) block.

A non-transitory computer readable storage medium storing a digital representation of a multi-port, multi-mode Reed Solomon (RS) forward error correction system, the system comprising:

• a plurality of data in lines, a data in line associated with a data port;
• a syndrome block (SDM) comprising a plurality of syndrome slices and a SDM switching logic, an input of a SDM slice coupled with a data in line from the plurality of data in lines, the SDM switching logic coupled with an interface port width (IFW) line a mode line, the IFW line to identify a number of data in lines tied together and the mode line to identify a RS mode, each SDM slice outputting an SDM slice output signal, the switching logic comprising:
• one or more adders, each of the adders configured to combine SDM slice outputs to generate combinations of SDM slice outputs;
• one or more multiplexers, each multiplexer configured to receive an IFW signal and select a combination of the SDM slice outputs based on the value of the IFW signal, the combinations of the SDM slice output provided as input to a reformulated inversionless Berlekamp-Massey (RiBM) block.