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| Content Provider | Springer Nature Link |
|---|---|
| Author | Hong, Xianlong Ma, Yuchun Dong, Sheqin Cai, Yici Cheng, Chung Kuan Jun, Gu |
| Copyright Year | 2004 |
| Abstract | Floorplanning is a critical phase in physical design of VLSI circuits. The stochastic optimization method is widely used to handle this NP-hard problem. The key to the floorplanning algorithm based on stochastic optimization is to encode the floorplan structure properly. In this paper, corner block list (CBL)—a new efficient topological representation for non-slicing floorplan—is proposed with applications to VLSI floorplan. Given a corner block list, it takes only linear time to construct the floorplan. In floorplanning of typical VLSI design, some blocks are required to satisfy some constraints in the final packing. Boundary constraint is one kind of those constraints to pack some blocks along the pre-specified boundaries of the final chip so that the blocks are easier to be connected to certain I/O pads. We implement the boundary constraint algorithm for general floorplan by extending CBL. Our contribution is to find the necessary and sufficient characterization of the blocks along the boundary represented by CBL. We can check the boundary constraints by scanning the intermediate solutions in linear time during the simulated annealing process and fix the corner block list in case the constraints are violated. The experiment results are demonstrated by several examples of MCNC benchmarks and the performance is remarkable. |
| Starting Page | 1 |
| Ending Page | 19 |
| Page Count | 19 |
| File Format | |
| ISSN | 10092757 |
| Journal | Science in China Series : Information Sciences |
| Volume Number | 47 |
| Issue Number | 1 |
| e-ISSN | 18622836 |
| Language | English |
| Publisher | Science in China Press |
| Publisher Date | 2004-01-01 |
| Publisher Place | Beijing |
| Access Restriction | Subscribed |
| Subject Keyword | floorplan corner block list simulated annealing boundary constraints Information Systems and Communication Service |
| Content Type | Text |
| Resource Type | Article |
| Subject | Computer Science |
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