Octuple-precision floating-point format: Difference between revisions

Revision as of 23:06, 22 December 2020

Revision as of 10:22, 22 December 2022

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{{short description|256-bit computer number format}}

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==Implementations==

Octuple precision is rarely implemented since usage of it is extremely rare. [[Apple Inc.]] had an implementation of addition, subtraction and multiplication of octuple-precision numbers with a 224-bit [[two's complement]] significand and a 32-bit exponent.<ref>{{cite web|urlname=http://images.apple.com/ca/acg/pdf/oct3a.pdf |title=Octuple-precision floating point on Apple G4 (archived copy on web.archive.org) |author1=R. "Crandall |author2=J. Papadopoulos |date=8 May 2002 |url-status=unfit |archiveurl=https:Papadopoulos_2002"//web.archive.org/web/20060728140052/http://images.apple.com/ca/acg/pdf/oct3a.pdf |archivedate=July 28, 2006 }}</ref> One can use general [[arbitrary-precision arithmetic]] libraries to obtain octuple (or higher) precision, but specialized octuple-precision implementations may achieve higher performance.

=== Hardware support ===

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* [[ISO/IEC 10967]], Language-independent arithmetic

* [[Primitive data type]]

* [[Scientific notation]]

== References ==

{{reflist}}|refs=

<ref name="Crandall-Papadopoulos_2002">{{cite web |title=Octuple-precision floating point on Apple G4 (archived copy on web.archive.org) |author-first1=Richard E. |author-last1=Crandall |author-link1=Richard E. Crandall |author-first2=Jason S. |author-last2=Papadopoulos |date=2002-05-08 |url=http://images.apple.com/ca/acg/pdf/oct3a.pdf |url-status=unfit |archive-url=https://web.archive.org/web/20060728140052/http://images.apple.com/ca/acg/pdf/oct3a.pdf |archive-date=2006-07-28}} (8 pages)</ref>

}}

==Further reading==