An offset of "1000/0" for example means, that differences between shapes on layer "16/0" will be sent to "1016/0" for the first toleranceįinally, the XOR can be confined to a region. If output is sent to one of the original inputs, it is mandatory to specify a layer offset which maps the The XOR tool allows sending the output either to a marker database or to another or one of the input layouts. The choice of the tile size mainly determines memory requirements. For semi-flat layouts such as standard cell blocks, a tile size Tiling can be enabled by entering a tile size into the entry box. Markers and others for markers indicating differences larger than 1nm, 5nm and 10nm. For example, a tolerance specification of "0,0.001,0.005,0.010" will create four sets (marker categories) containing all difference In that case, multiple undersize steps are performed to create sets of layers with different This is particular useful to remove markers resulting from tiny differences between the layouts being compared. This way, small markers can be suppressed. Basically a tolerance is an undersizing step following the boolean operation. The XOR tool allows specification of tolerances. This does not reduce the run times but the memory requirements. The memory footprint associated with the flat approach can be mitigated by using the tiling feature which performs the operation Make use of hierarchy, which basically excludes applications for very hierarchical layouts (i.e. This limits the application somewhat to small and medium sized layouts and does not The current implementation employs a flat XOR processor. Currently, it compares layers from one layout vs. The XOR tool is started using "XOR Tool" from the "Tools" menu).Ĭurrently, the tool compares all or just the visible layers. The XOR tool performs a geometrical XOR (also ANOTB and BNOTA for asymmetric differences) on two layouts by performing the respective boolean operations layer by layer. KLayout Documentation (Qt 5): Main Index » KLayout User Manual » Advanced Topics » The XOR Tool The XOR Tool
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