Re: Compiler optimization and floating point operations

glen herrmannsfeldt <gah@ugcs.caltech.edu>
Thu, 24 Oct 2013 20:21:21 +0000 (UTC)

          From comp.compilers
Related articles
Compiler optimization and floating point operations abidmuslim@gmail.com (Abid) (2013-10-23)
Re: Compiler optimization and floating point operations cameron.mcinally@nyu.edu (Cameron McInally) (2013-10-23)
Re: Compiler optimization and floating point operations gah@ugcs.caltech.edu (glen herrmannsfeldt) (2013-10-24)
Re: Compiler optimization and floating point operations gneuner2@comcast.net (George Neuner) (2013-10-24)
Re: Compiler optimization and floating point operations jm@bourguet.org (Jean-Marc Bourguet) (2013-10-24)
Re: Compiler optimization and floating point operations sgk@troutmask.apl.washington.edu (Steven G. Kargl) (2013-10-24)
Re: Compiler optimization and floating point operations gneuner2@comcast.net (George Neuner) (2013-10-24)
Re: Compiler optimization and floating point operations gah@ugcs.caltech.edu (glen herrmannsfeldt) (2013-10-24)
Re: Compiler optimization and floating point operations christian.bau@cbau.wanadoo.co.uk (2013-10-28)
Re: Compiler optimization and floating point operations christian.bau@cbau.wanadoo.co.uk (2013-10-28)
Re: Compiler optimization and floating point operations cameron.mcinally@nyu.edu (Cameron McInally) (2013-10-28)
| List of all articles for this month |
From: glen herrmannsfeldt <gah@ugcs.caltech.edu>
Newsgroups: comp.compilers
Date: Thu, 24 Oct 2013 20:21:21 +0000 (UTC)
Organization: Aioe.org NNTP Server
References: 13-10-026 13-10-029
Keywords: arithmetic, administrivia, comment
Posted-Date: 24 Oct 2013 16:46:37 EDT

(snip, John wrote)


> [I think you mean they're not associative. I don't know any
> situations where a+b != b+a, but lots where a+(b+c) != (a+b)+c -John]


I don't know of any with non-commutative addition, but there were
some Cray machines with non-commutative multiply.


For many Cray applications, getting a close answer fast is better
than the exact answer slow.


-- glen
[Oh, right. Can we safely assume that arithmetic model is dead? -John]

Post a followup to this message

Return to the comp.compilers page.
Search the comp.compilers archives again.