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== Title ==
I think this article should be moved, since the title is not conform to IEEE 754r, which refers the format as '''quad''' or '''quadruple precision''', but never '''quad precision'''. Also '''quad''' is not really an adjective like '''single''' and '''double'''. See e.g. the draft on [http://754r.ucbtest.org/]. — [[User:Ylai|Ylai]] 08:53, 9 January 2006 (UTC)
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These statements contradict each other.
:It appears this has been cleaned up. -[[User:JakeVortex|Jake]] ([[User talk:JakeVortex|talk]]) 04:27, 20 September 2014 (UTC)
== Max quad begins with (hex) 7fef or 7ffe? ==
I think it should probably be "7ffe" in the first block of four hex digits unless anyone can say why not.
:Yes, <code>7ffe</code> -[[User:JakeVortex|Jake]] ([[User talk:JakeVortex|talk]]) 04:27, 20 September 2014 (UTC)
== Possible Error in the Example for 1/3 ==
Line 100 ⟶ 102:
[[User:Vincent Lefèvre|Vincent Lefèvre]] ([[User talk:Vincent Lefèvre|talk]]) 17:39, 12 April 2013 (UTC)
:Links to specific commercial systems such as this one are not appropriate per [[WP:ELNO]], I removed it again. - [[User:MrOllie|MrOllie]] ([[User talk:MrOllie|talk]]) 10:04, 17 September 2013 (UTC)
::Any commercial software or product can be described as "specific commercial system". I think there is some major misunderstanding since Wikipedia has a lot references to "specific commercial systems" like Microsoft Windows, MATLAB, Intel CPUs, etc. This page alone contains links to Microsoft Visual C++, Intel C++/Fortran compiler and even SPARC processor - all of which are very "specific commercial systems". The Multiprecision Computing Toolbox for MATLAB is no different from these tools. Toolbox adds quadruple-precision floating-point support to MATLAB system. It is used by hundreds of researchers around the globe, cited in dozens of scientific papers and books (citations appeared just in last several months: http://www.advanpix.com/2015/04/02/citations-digest-v-4/). Why do you think it is not good enough for Wikipedia?
::[[WP:ELNO]] is designed to prevent the scam, spam and links to malicious/harmful resources. It has no any signs of crusade against "specific commercial systems". Obviously removal of all references to "specific commercial systems" would make the article (and Wikipedia in general) shallow and non-informative.
::Could you please explain in detail your reasoning and provide exact item number from [[WP:ELNO]] which toolbox falls under? [[User:Kletka|Kletka]] ([[User talk:Kletka|talk]]) 02:55, 20 June 2015 (UTC)
:::Now I think that there should be a third subsection "Libraries and toolboxes" for [[Quadruple-precision floating-point format#Implementations|Implementations]], and these external links would mainly be references (unless there already is a Wikipedia article for them). – [[User:Vincent Lefèvre|Vincent Lefèvre]] ([[User talk:Vincent Lefèvre|talk]]) 11:05, 20 June 2015 (UTC)
::::I think this would work nicely. Actually, as a draft, I have added such sub-section with two references. Please revise/remove it or let's discuss further. I have added link to toolbox if no other complains exist. [[User:Kletka|Kletka]] ([[User talk:Kletka|talk]]) 02:35, 22 June 2015 (UTC)
:::::They were not references, but external links. I've replaced them by references, with more accurate URL's about the features in question. – [[User:Vincent Lefèvre|Vincent Lefèvre]] ([[User talk:Vincent Lefèvre|talk]]) 22:12, 22 June 2015 (UTC)
::::::Yes, definitely, this is much better. Will follow the style in future. [[Special:Contributions/223.218.164.210|223.218.164.210]] ([[User talk:223.218.164.210|talk]]) 02:24, 23 June 2015 (UTC)
== External links modified ==
Hello fellow Wikipedians,
I have just modified {{plural:2|one external link|2 external links}} on [[Quadruple-precision floating-point format]]. Please take a moment to review [https://en.wikipedia.org/w/index.php?diff=prev&oldid=716259763 my edit]. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit [[User:Cyberpower678/FaQs#InternetArchiveBot|this simple FaQ]] for additional information. I made the following changes:
*Corrected formatting/usage for http://h21007.www2.hp.com/portal/download/files/unprot/intel/product_brief_Fortran_Linux.pdf
*Added archive http://web.archive.org/web/20121009191824/http://developer.apple.com/legacy/mac/library/documentation/Performance/Conceptual/Mac_OSX_Numerics/Mac_OSX_Numerics.pdf to http://developer.apple.com/legacy/mac/library/documentation/Performance/Conceptual/Mac_OSX_Numerics/Mac_OSX_Numerics.pdf
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Cheers.—[[User:Cyberbot II|<sup style="color:green;font-family:Courier">cyberbot II</sup>]]<small><sub style="margin-left:-14.9ex;color:green;font-family:Comic Sans MS">[[User talk:Cyberbot II|<span style="color:green">Talk to my owner</span>]]:Online</sub></small> 19:07, 20 April 2016 (UTC)
== Add minimum to examples? ==
<pre>
0001 0000 0000 0000 0000 0000 0000 0000 ≈ -1.189731495357231765085759326628008 × 10<sup>-4932</sup>
(min quadruple precision)
</pre>
This probably needs to be added for those wishing to know what the minimum is in hexadecimal. However, I am not sure if it is truely `-1.189...7 + 0.0...1 x 10<sup>-4932</sup>`. I didn't calculate it.
Much love, [[User:PauSix|PauSix]] ([[User talk:PauSix|talk]]) 03:27, 20 October 2018 (UTC)
:Last November I added more examples to all the various floating-point formats, so that (hopefully) they all contain the same set of examples. The minimum value mentioned above was added as "smallest positive normal number". [[User:Pjacklam|Peter J. Acklam]] ([[User talk:Pjacklam|talk]]) 07:44, 7 August 2019 (UTC)
== Conversion to binary and back ==
The sentence "If a decimal string with at most 33 significant digits is converted to IEEE 754 quadruple-precision representation, and then converted back to a decimal string with the same number of digits, the final result should match the original string" is only true if the quadruple precision representation is a normal number. Subnormals have less precision and proportionately fewer decimal digits are allowed. The wikipedia article for double precision floating-point format has the same issue. [[Special:Contributions/2601:18C:4200:60F0:845C:148F:C31C:6449|2601:18C:4200:60F0:845C:148F:C31C:6449]] ([[User talk:2601:18C:4200:60F0:845C:148F:C31C:6449|talk]]) 13:48, 15 August 2022 (UTC)
:Thanks (and this won't work either in case of overflow, though this is a bit more obvious). I've just done the correction in [[Quadruple-precision floating-point format]], [[Double-precision floating-point format]] and [[Single-precision floating-point format]]. — [[User:Vincent Lefèvre|Vincent Lefèvre]] ([[User talk:Vincent Lefèvre|talk]]) 17:43, 17 August 2022 (UTC)
== Broken Link ==
Reference 1, which is:
David H. Bailey; Jonathan M. Borwein (July 6, 2009). "High-Precision Computation and Mathematical Physics" (PDF).
no longer works for me. [[Special:Contributions/64.16.131.2|64.16.131.2]] ([[User talk:64.16.131.2|talk]]) 21:45, 22 February 2023 (UTC)
:Thanks for the information. I've just updated the URL. — [[User:Vincent Lefèvre|Vincent Lefèvre]] ([[User talk:Vincent Lefèvre|talk]]) 21:58, 22 February 2023 (UTC)
== request about discussion / seek consensus for the info about different understanding of the encodings ==
I added an info about 'integral understanding of the significand', fully backed by IEEE standard paper and with citation, the user Vincent Lefèvre like to delete it repeatedly. IMHO it's against WP policy about different opinions, he should seek consenus here!
== request to block user Vincent Lefèvre from 'silly reverts' ==
I am not the only user who is annoyed by stupid aggressive deletions by the user Vincent Lefèvre, see his talk page. Is there a way to stop this blockwart behavior?
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