A method for determining a mapping between two code spaces is disclosed. The method may include receiving first and second plurality of data words. The least-significant-bits (LSBs) of a first data word of a first subset of the first plurality of data words may be compared to the LSBs of each data word of a second subset of the second plurality of data words. The first data word may then be mapped to a second data word of the second subset. A number of LSBs of the second data word matching LSBs of the first data word may be greater than a respective number of LSBs of each data word of a third subset of the second subset matching the LSBs of the first data word, where the third subset excludes the second data word and a most-significant-bit (MSB) of the second data word may be the same as a MSB of the first data word.