摘要
创新点
多层绕障斯坦纳布线是现代超大规模集成电路物理设计的一个基础性问题。 此外, 随着当前芯片特征尺寸步入深亚微米阶段, 传统的曼哈顿布线结构不能较好的满足设计需求, 因此新兴的非曼哈顿成为了当前的研究热点。 在本文, 我们设计了 MLXR, 它是一种针对分布在芯片层上的漏点和障碍物集合, 能高效地构建一棵多层绕障 X-结构斯坦纳最小树的布线算法。 更详细地讲, MLXR 采用一种基于查找表的框架, 通过构建一棵三维无障最小生成树作为基本架构, 采用三种新颖的基于投影的绕障策略, 并结合两种有效的精炼技术, 最终将这棵三维最小生成树转化为一棵多层绕障 X-结构斯坦纳最小树。 实验结果表明, 同现有的最先进算法相比, MLXR 在布线总长和运行速度两个方面都是非常出色的。
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Huang, X., Guo, W., Liu, G. et al. MLXR: multi-layer obstacle-avoiding X-architecture Steiner tree construction for VLSI routing. Sci. China Inf. Sci. 60, 19102 (2017). https://doi.org/10.1007/s11432-015-0850-4
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DOI: https://doi.org/10.1007/s11432-015-0850-4