| Presentation | 2021-12-02 Calculation method of correctly rounded exponential function on an FPGA Takuya Haraguchi, Naofumi Takagi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We propose the FPGA-oriented calculation method of correctly rounded exponential function, exp, which is one of the functions recommended for correct rounding in IEEE754 standard. In this calculation method, exp is calculated with high-radix STL method and Taylor series approximation. By restricting the direction of the calculation error to one direction depending on the sign of the input, we reduce the accuracy required for correct rounding from 158 bits to 114 bits. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | IEEE754 / exponential function / double precision / floating point number / correct rounding / high-radix STL method / FPGA |
| Paper # | VLD2021-35,ICD2021-45,DC2021-41,RECONF2021-43 |
| Date of Issue | 2021-11-24 (VLD, ICD, DC, RECONF) |
| Conference Information | |
| Committee | VLD / DC / RECONF / ICD / IPSJ-SLDM |
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| Conference Date | 2021/12/1(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Design Gaia 2021 -New Field of VLSI Design- |
| Chair | Kazutoshi Kobayashi(Kyoto Inst. of Tech.) / Hiroshi Takahashi(Ehime Univ.) / Kentaro Sano(RIKEN) / Masafumi Takahashi(Kioxia) / Yuichi Nakamura(NEC) |
| Vice Chair | Minako Ikeda(NTT) / Tatsuhiro Tsuchiya(Osaka Univ.) / Yoshiki Yamaguchi(Tsukuba Univ.) / Tomonori Izumi(Ritsumeikan Univ.) / Makoto Ikeda(Univ. of Tokyo) |
| Secretary | Minako Ikeda(Osaka Univ.) / Tatsuhiro Tsuchiya(NEC) / Yoshiki Yamaguchi(Nihon Univ.) / Tomonori Izumi(Chiba Univ.) / Makoto Ikeda(NEC) / (Tokyo Inst. of Tech.) |
| Assistant | / / Yukitaka Takemura(INTEL) / Yasunori Osana(Ryukyu Univ.) / Kosuke Miyaji(Shinshu Univ.) / Yoshiaki Yoshihara(キオクシア) / Takeshi Kuboki(Kyushu Univ.) |
| Paper Information | |
| Registration To | Technical Committee on VLSI Design Technologies / Technical Committee on Dependable Computing / Technical Committee on Reconfigurable Systems / Technical Committee on Integrated Circuits and Devices / Special Interest Group on System and LSI Design Methodology |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Calculation method of correctly rounded exponential function on an FPGA |
| Sub Title (in English) | |
| Keyword(1) | IEEE754 |
| Keyword(2) | exponential function |
| Keyword(3) | double precision |
| Keyword(4) | floating point number |
| Keyword(5) | correct rounding |
| Keyword(6) | high-radix STL method |
| Keyword(7) | FPGA |
| 1st Author's Name | Takuya Haraguchi |
| 1st Author's Affiliation | Kyoto University(Kyoto Univ.) |
| 2nd Author's Name | Naofumi Takagi |
| 2nd Author's Affiliation | Kyoto University(Kyoto Univ.) |
| Date | 2021-12-02 |
| Paper # | VLD2021-35,ICD2021-45,DC2021-41,RECONF2021-43 |
| Volume (vol) | vol.121 |
| Number (no) | VLD-277,ICD-278,DC-279,RECONF-280 |
| Page | pp.pp.105-110(VLD), pp.105-110(ICD), pp.105-110(DC), pp.105-110(RECONF), |
| #Pages | 6 |
| Date of Issue | 2021-11-24 (VLD, ICD, DC, RECONF) |