Presentation 2015-12-02
A Floorplan-aware High-level Synthesis Algorithm Utilizing Interconnection Delay and Clock Skew in FPGA Designs
Koichi Fujiwara, kazushi Kawamura, Masao Yanagisawa, Nozomu Togawa,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) With recent process scaling in FPGAs, interconnection delays and clock skews have a large impact on the latency of a circuit and then may degrade operation frequency. We must consider interconnection delays and clock skews in floorplan-aware FPGA-HLS flow to design circuits having small latency. In this paper, we propose a floorplan-aware high-level synthesis algorithm for FPGA designs optimizing operation frequency of a circuit by improving interconnection delays and clock skews on the critical-path. Our target architecture is HDR, one of distributed-register architectures, and then we can consider module floorplan easily. Based on it, we estimate the delay of each signal path including interconnection delays and clock-skews, and identify the critical-path. To optimize them, we propose a novel scheduling/FU binding method and a novel floorplanning method. Experimental results demonstrate that our algorithm can realize FPGA designs which reduce the latency by up to 24% compared with conventional approaches.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) high-level synthesis (HLS) / FPGA / clock skew / interconnection delay / floorplan
Paper # VLD2015-54,DC2015-50
Date of Issue 2015-11-24 (VLD, DC)

Conference Information
Committee VLD / DC / IPSJ-SLDM / CPSY / RECONF / ICD / CPM
Conference Date 2015/12/1(3days)
Place (in Japanese) (See Japanese page)
Place (in English) Nagasaki Kinro Fukushi Kaikan
Topics (in Japanese) (See Japanese page)
Topics (in English) Design Gaia 2015 -New Field of VLSI Design-
Chair Yusuke Matsunaga(Kyushu Univ.) / Nobuyasu Kanekawa(Hitachi) / Masahiro Fukui(Ritsumeikan Univ.) / Yasuhiko Nakashima(NAIST) / Minoru Watanabe(Shizuoka Univ.) / Minoru Fujishima(Hiroshima Univ.) / Satoru Noge(Numazu National College of Tech.)
Vice Chair Takashi Takenana(NEC) / Michiko Inoue(NAIST) / / Koji Nakano(Hiroshima Univ.) / Hidetsugu Irie(Univ. of Tokyo) / Masato Motomura(Hokkaido Univ.) / Yuichiro Shibata(Nagasaki Univ.) / Hideto Hidaka(Renesas) / Fumihiko Hirose(Yamagata Univ.)
Secretary Takashi Takenana(Ritsumeikan Univ.) / Michiko Inoue(Fujitsu Labs.) / (RTRI) / Koji Nakano(Kyoto Sangyo Univ.) / Hidetsugu Irie(Sharp) / Masato Motomura(Kitakyushu City Univ.) / Yuichiro Shibata(Toshiba) / Hideto Hidaka(Fujitsu Labs.) / Fumihiko Hirose(NII)
Assistant Ittetsu Taniguchi(Ritsumeikan Univ.) / / / Shinya Takameda(NAIST) / Takeshi Ohkawa(Utsunomiya Univ.) / Kazuya Tanikagawa(Hiroshima City Univ.) / Takefumi Miyoshi(e-trees.Japan) / Makoto Takamiya(Univ. of Tokyo) / Hiroe Iwasaki(NTT) / Takashi Hashimoto(Panasonic) / Hiroyuki Ito(Tokyo Inst. of Tech.) / Pham Konkuha(Univ. of Electro-Comm.) / Takashi Sakamoto(NTT) / Yuichi Nakamura(Toyohashi Univ. of Tech.)

Paper Information
Registration To Technical Committee on VLSI Design Technologies / Technical Committee on Dependable Computing / Special Interest Group on System and LSI Design Methodology / Technical Committee on Computer Systems / Technical Committee on Reconfigurable Systems / Technical Committee on Integrated Circuits and Devices / Technical Committee on Component Parts and Materials
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) A Floorplan-aware High-level Synthesis Algorithm Utilizing Interconnection Delay and Clock Skew in FPGA Designs
Sub Title (in English)
Keyword(1) high-level synthesis (HLS)
Keyword(2) FPGA
Keyword(3) clock skew
Keyword(4) interconnection delay
Keyword(5) floorplan
1st Author's Name Koichi Fujiwara
1st Author's Affiliation Waseda University(Waseda Univ.)
2nd Author's Name kazushi Kawamura
2nd Author's Affiliation Waseda University(Waseda Univ.)
3rd Author's Name Masao Yanagisawa
3rd Author's Affiliation Waseda University(Waseda Univ.)
4th Author's Name Nozomu Togawa
4th Author's Affiliation Waseda University(Waseda Univ.)
Date 2015-12-02
Paper # VLD2015-54,DC2015-50
Volume (vol) vol.115
Number (no) VLD-338,DC-339
Page pp.pp.99-104(VLD), pp.99-104(DC),
#Pages 6
Date of Issue 2015-11-24 (VLD, DC)