Advanced physical verification solutions
XOR and QuickDiff PDF  | Print |  E-mail

XOR is a regular diffing function for two layouts. It involves profound comparison of corresponding layers in pairs according to rule file - either generated automatically or specifically written. In PowerDRC/LVS, 
XOR operation leverages multi-CPU and multi-core technologies for the best efficiency. It becomes truly impressive when XOR is combined with QuickDiff with manifold eventual speedup.

QuickDiff is a quick check for small pre-tapeout changes (often called ECO - engineering change order) by means of special heuristic algorithms. It is intended primarily to detect differences (or ensure their absence) in two revisions of a given layout close before tapeout.