| 摘要 |
A hierarchical circuit design is divided into independent components which can be processed independently of one another to simultaneously achieve the advantages of both hierarchical and flat paradigms. Blocks of the circuit design are flattened sufficiently to place and route global networks through the blocks. The flattened blocks of the circuit design are de-coupled to form independent blocks. In de-coupling the blocks, pins are added at intersections of the global networks with boundaries of the blocks. The global networks are divided into wire fragments between the pins and components of the flattened circuit design in generally the same place previously occupied by the global networks. Wire fragments inside a particular block of the circuit design are added to the block. Wire fragments outside all blocks are fixed as components of the circuit design. The blocks are therefore de-coupled at the pin positions along the block boundaries. As a result, a hierarchical representation of each block of the circuit design can be reconstructed, complete with internal wire fragments of the global networks, independently of all other blocks of the hierarchical circuit design. For example, another block can be left in the flattened state and processed according to a flat paradigm while the former block is reconstructed and processed according to a hierarchical paradigm.
|
