A Simultaneous Technology Mapping, Placement, and Global Routing Algorithm for FPGAs with Path Delay Constraints (Special Section of Selected Papers from the 8th Karuizawa Workshop on Circuits and Systems)
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概要
- 論文の詳細を見る
In this paper, we propose a new FPGA design algorithm, Maple-opt, in which technology mapping, placement, and global routing are executed so that the delay of each critical signal path in an input circuit is within a specified upper bound imposed on it. The basic algorithm of Maple-opt is top-down hierarchical bi-partitioning of regions. Technology mapping onto logic-blocks of FPGAs, their placement, and global routing are determined simultaneously in each hierarchical process. This simultaneity leads to less congested layout for routing. In addition to that, Maple-opt computes a lower bound of delay for each path with a constraint value and determines critical paths based on the difference between the lower bound and the constraint value dynamically in each hierarchical process. Two delay reduction processes are executed for the critical paths; one is routing delay reduction and the other is logic-block delay reduction. Routing delay reduction is realized such that, when bi-partitioning a region, each constrained path is assigned to one subregion. Logic-block delay reduction is realized such that each constrained path is mapped onto fewer logic-blocks. Experimental results for some benchmark circuits show its efficiency and effectiveness.
- 社団法人電子情報通信学会の論文
- 1996-03-25
著者
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TOGAWA Nozomu
Department of Computer Science, Waseda University
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Ohtsuki Tatsuo
Department of Computer Science and Engineering, Waseda University
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Sato M
The Department Of Electronics Information And Communication Engineering Waseda University
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Sato Masao
Department Of Legal Medicine Fukushima Medical University School Of Medicine
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Togawa N
Univ. Kitakyushu Kitakyushu‐shi Jpn
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Ohtsuki Tatsuo
Department Of Computer Science And Engineering Waseda University
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Ohtsuki T
Department Of Electrical Engineering Tokyo University Of Science
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Togawa Nozomu
Department Of Computer Science And Engineering Waseda University
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Sato Masao
Department Of Applied Biological Chemistry Graduate School Of Bioresource And Bioenvironmental Scien
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