Routability Driven White Space Allocation for Fixed-Die Standard-Cell Placement

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Routability Driven White Space Allocation for Fixed-Die Standard-Cell Placement (2002)

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by Xiaojian Yang , Bo-Kyung Choi , Majid Sarrafzadeh

Venue:	ISPD
Citations:	47 - 0 self

BibTeX

@INPROCEEDINGS{Yang02routabilitydriven,
    author = {Xiaojian Yang and Bo-Kyung Choi and Majid Sarrafzadeh},
    title = {Routability Driven White Space Allocation for Fixed-Die Standard-Cell Placement},
    booktitle = {ISPD},
    year = {2002},
    pages = {42--47}
}

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Abstract

The use of white space in fixed-die standard-cell placement is an effective way to improve routability. In this paper, we present a white space allocation approach that dynamically assigns white space according to the congestion distribution of the placement. In the topdown placement flow, white space is assigned to congested regions using a smooth allocating function. A post allocation optimization step is taken to further improve placement quality. Experimental results show that the proposed allocation approach, combined with a multilevel placement flow, significantly improves placement routability and layout quality.

Keyphrases

fixed-die standard-cell placement routability driven white space allocation white space effective way allocation approach topdown placement flow white space allocation approach post allocation optimization step placement quality placement routability congestion distribution layout quality multilevel placement flow experimental result

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