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Paper Abstract and Keywords
Presentation 2021-12-02 10:35
Calculation method of correctly rounded exponential function on an FPGA
Takuya Haraguchi, Naofumi Takagi (Kyoto Univ.) VLD2021-35 ICD2021-45 DC2021-41 RECONF2021-43
Abstract (in Japanese) (See Japanese page) 
(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) 
(in English) IEEE754 / exponential function / double precision / floating point number / correct rounding / high-radix STL method / FPGA /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 277, VLD2021-35, pp. 105-110, Dec. 2021.
Paper # VLD2021-35 
Date of Issue 2021-11-24 (VLD, ICD, DC, RECONF) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF VLD2021-35 ICD2021-45 DC2021-41 RECONF2021-43

Conference Information
Committee VLD DC RECONF ICD IPSJ-SLDM  
Conference Date 2021-12-01 - 2021-12-02 
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- 
Paper Information
Registration To VLD 
Conference Code 2021-12-VLD-DC-RECONF-ICD-SLDM 
Language Japanese 
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  
Keyword(8)  
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.)
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Speaker Author-1 
Date Time 2021-12-02 10:35:00 
Presentation Time 25 minutes 
Registration for VLD 
Paper # VLD2021-35, ICD2021-45, DC2021-41, RECONF2021-43 
Volume (vol) vol.121 
Number (no) no.277(VLD), no.278(ICD), no.279(DC), no.280(RECONF) 
Page pp.105-110 
#Pages 6 
Date of Issue 2021-11-24 (VLD, ICD, DC, RECONF) 

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