IEC OSI ISO/IEC60559 Edition 2.02020-05 IEEE IEEE Std 754TM INTERNATIONAL STANDARD Floating-point arithmetic ISO/IEC 60559:2020-05(en) IEEE Std 754-2019 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2019 IEEE All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from ISO, IEC or IEEE at the respective address given below. ISO copyright office IEC Central Office Institute of Electrical and Electronics Engineers, Inc. Case postale 56 3, rue de Varembe 3 Park Avenue CH-1211 Geneva 20 CH-1211 Geneva 20 NewYork,NY10016-5997 Switzerland Switzerland United States of America [email protected] Tel.: +41 22 749 01 11 Tel.: +41 22 919 02 11 [email protected] [email protected] www.ieee.org www.iso.org www.iec.ch About the IEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. AboutIEcpublications The technical contentof IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigendum or an amendment might have been published. IEC publications search-webstore.iec.ch/advsearchform Electropedia- www.electropedia.org Theadvanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology varietyof criteria (reference text, technical containing more than 22 000 terminological entries in English number, committee...).It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages. and withdrawn publications. Also known as the International Electrotechnical Vocabulary (IEV) online. IEc Just Published - webstore.iec.ch/justpublished Stay up to date on all new IEC publications. Just Published IEc Glossary - std.iec.ch/glossary details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and once a month by email. French extracted from the Terms and definitions clause of IEC publications issued between 2002 and 2015.Some IECCustomerServiceCentre-webstore.iec.ch/csc entries have been _collected from earlier publications of IEC If you wish to give us your feedback on this publication or TC 37, 77, 86 and CISPR. needfurther assistance, please contact the Customer Service Centre: [email protected]. IEO ISO/IEC60559 ISO Edition 2.02020-05 IEEE IEEE Std 754TM INTERNATIONAL STANDARD Floating-point arithmetic INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 35.200 ISBN 978-2-8322-8178-9 Warning! Make sure that you obtained this publication from an authorized distributor.