Circuit, method, and computer program for reordering data units of a data block in accordance with a first pre-determined function. The method includes, for each data unit of the data block—(i) generating an address corresponding to a memory location of a single-port memory module into which the data unit is to be stored, and (ii) storing the data unit in the memory location based on the address generated for the data unit. Each address is generated in accordance with the first pre-determined function, and each memory location of the single-port memory has a different delay associated with the memory location. The method further includes reading each data unit out of the single-port memory in accordance with the first pre-determined function, wherein data units of the data block are reordered based on each different delay associated with each memory location.