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author:

Wen, Yuan (Wen, Yuan.) [1] | Zhu, Benchao (Zhu, Benchao.) [2] | Lin, Zhifeng (Lin, Zhifeng.) [3] (Scholars:林智锋) | Chen, Jianli (Chen, Jianli.) [4]

Indexed by:

CPCI-S EI Scopus

Abstract:

Recently, hybrid-row-height designs have been introduced to achieve performance and area co-optimization in advanced nodes. Hybrid-row-height designs incur challenging issues to layout due to the heterogeneous cell and row structures. In this paper, we present an effective algorithm to address the hybrid-row-height placement problem in two major stages: (1) global placement, and (2) legalization. Inspired by the multi-channel processing method in convolutional neural networks (CNN), we use the feature extraction technique to equivalently transform the hybrid-row-height global placement problem into two sub-problems that can be solved effectively. We propose a multi-layer nonlinear framework with alignment guidance and a self-adaptive parameter adjustment scheme, which can obtain a high-quality solution to the hybrid-row-height global placement problem. In the legalization stage, we formulate the hybrid-row-height legalization problem into a convex quadratic programming (QP) problem, then apply the robust modulus-based matrix splitting iteration method (RMMSIM) to solve the QP efficiently. After RMMSIM-based global legalization, Tetris-like allocation is used to resolve remaining physical violations. Compared with the state-of-the-art work, experiments on the 2015 ISPD Contest benchmarks show that our algorithm can achieve 7% shorter final total wirelength and 2.23x speedup.

Keyword:

Hybrid-row-height structure Nonlinear placement Physical design Placement

Community:

  • [ 1 ] [Wen, Yuan]Fudan Univ, State Key Lab ASIC & Syst, Shanghai 200433, Peoples R China
  • [ 2 ] [Zhu, Benchao]Fudan Univ, State Key Lab ASIC & Syst, Shanghai 200433, Peoples R China
  • [ 3 ] [Chen, Jianli]Fudan Univ, State Key Lab ASIC & Syst, Shanghai 200433, Peoples R China
  • [ 4 ] [Lin, Zhifeng]Fuzhou Univ, Ctr Discrete Math & Theoret Comp Sci, Fuzhou 350108, Peoples R China

Reprint 's Address:

  • [Wen, Yuan]Fudan Univ, State Key Lab ASIC & Syst, Shanghai 200433, Peoples R China

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Source :

29TH ASIA AND SOUTH PACIFIC DESIGN AUTOMATION CONFERENCE, ASP-DAC 2024

ISSN: 2153-6961

Year: 2024

Page: 300-305

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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