Gi-Joon Nam, Charles J. Alpert, Paul G. Villarrubia (auth.),'s Modern Circuit Placement: Best Practices and Results PDF

By Gi-Joon Nam, Charles J. Alpert, Paul G. Villarrubia (auth.), Gi-Joon Nam, Jason Cong (eds.)

ISBN-10: 038736837X

ISBN-13: 9780387368375

ISBN-10: 0387687394

ISBN-13: 9780387687391

Modern Circuit Placement: top Practices and Results describes complicated thoughts in VLSI circuit placement that is probably the most vital steps of the VLSI actual layout move. actual layout addresses the back-end structure level of the chip layout approach. As expertise scales down, the importance of interconnect optimization turns into even more vital and actual layout, fairly the situation approach, is vital to interconnect optimization.

This publication has 4 special features. First, it specializes in the latest hugely scalable placement strategies used for multi-million gate circuit designs, with attention of many useful points of recent circuit placement, similar to density and routability regulate, mixed-size placement help, and quarter I/O aid. moment the e-book addresses dominant options getting used within the box. This publication contains all of the educational placement instruments that competed on the foreign Symposium on actual layout (ISPD) placement contest in 2005 and 2006. even supposing those instruments are constructed via academia, many middle strategies in those instruments are getting used broadly in and signify today’s complex placement strategies. 3rd, the ebook offers quantitative comparability one of the a variety of options on universal benchmark circuits derived from real-life commercial designs. The publication comprises a great deal of research on every one method, comparable to trade-offs among quality-of-results (QoR) and runtime. eventually, research of the optimality of the location recommendations is incorporated. this is often performed through the use of placement benchmarks with identified optimum ideas, but with features just like actual commercial designs.

Modern Circuit Placement: most sensible Practices and Results is a worthwhile device and a must-read for graduate scholars, researchers and CAD device builders within the VLSI actual synthesis and actual layout fields.

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The following are a few characteristics of our approach, which differentiates DPlace from other analytical placement works. • • • • We propose a global placement framework that uses anchor cells to split a traditional placement/spreading iteration into two steps, the preplacement step to reduce the cell overlaping, and the unconstrained wire length minimization step to reduce the wire length. In order to reduce the gap between the quadratic wire length vs. linear wire length objective, we introduce a net weight linearization strategy that transforms the star model-based quadratic objective into HPWL objective exactly.

End if Snap Pmac into G, truncating macros as necessary; mark grid cells assigned to macros. Nws := φws · N G . repeat Randomly select unvisited non-macro grid cell c. if (the spatial neighbors of c remain spatially connected in G when c is removed) then Mark c as white space and decrement Nws . end if until (Nws == 0 or every non-macro grid cell has been examined) if (Nws > 0) report failure and exit end if Mark all unmarked grid cells as standard cells; V := {macros} ∪ {standard cells}. 3, generate a minimal netlist “backbone” E B , a connected set of local nets consistent with N# which covers V.

In Proc. Int. Symp. on Phys. Design, pages 88–94, 2003 10. J. R. Shinnerl, M. Xie, T. Kong, and X. Yuan. Large-scale circuit placement. ACM Trans. on Design Automation of Electronic Systems, 10(2):389–430, 2005 36 2 Locality and Utilization in Placement Suboptimality 11. J. Cong and M. Xie. A robust detailed placement for mixed-size IC designs. In Proc. , pages 188–194, 2006 12. K. M. J. Antreich. Iterative placement improvement by network flow methods. IEEE Trans. on Computer-Aided Design, 13(10), October 1994 13.

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Modern Circuit Placement: Best Practices and Results by Gi-Joon Nam, Charles J. Alpert, Paul G. Villarrubia (auth.), Gi-Joon Nam, Jason Cong (eds.)

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