Automatic placement and routing device

摘要

There is provided an automatic placement and routing device which automatically performs placement and routing upon cells constituting a logic circuit while optimizing a bus structure. Bus structure construction means (12) constructs the bus structure which is a structure of signal lines for making connection between the cells to provide a bus construction result, based on bus information held in a bus information holding portion (7), cell placement information, constraint information from a constraint information holding portion (9) and logic circuit information from a logic circuit information holding portion (8), when the logic circuit information held in the logic circuit information holding portion (8) does not completely specify the bus structure.