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RE: g++ optimization issue??
- From: "Dave Korn" <dave dot korn at artimi dot com>
- To: "'ColinLaney'" <claney at online dot de>,<gcc at gcc dot gnu dot org>
- Date: Fri, 17 Dec 2004 12:27:11 -0000
- Subject: RE: g++ optimization issue??
> -----Original Message-----
> From: gcc-owner On Behalf Of ColinLaney
> Sent: 17 December 2004 12:13
> I'm sorry if this has come up before and/or is well known or
> obvious. If so I would appreciated to be pointed in the right
> direction.
>
> When compiled with "-O6"
You do understand that there aren't any optimisation levels > 3, don't you?
> the program below produces the following output:
> 203744051 0.440158
> 203744051 0.633306
> 203744051 0.633306
> 203744051 0.440158
>
>
> I've added some comments on what I think went wrong.
Have you read 'What every computer scientist should know about floating
point'?
http://tinyurl.com/4sw7n
cheers,
DaveK
--
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