g++ optimization issue??

[ColinLaney]

Sorry, I was referring to the first sentence:
I am aware of fp issues. I just don't understand why the compiler
generates code that is not [aware of fp issues].

On Fri, 2004-12-17 at 13:50 +0100, Lars Segerlund wrote:
>  Is not what ?
> 
>  I don't understand what you are trying to say. Please be a bit more precise.
> 
>  / Lars Segerlund.
> 
> 
> On Fri, 17 Dec 2004 13:36:19 +0100
> ColinLaney <claney@online.de> wrote:
> 
> > I am aware of fp issues. I just don't understand why the compiler
> > generates code that is not.
> > 
> > On Fri, 2004-12-17 at 12:27 +0000, Dave Korn wrote:
> > > > -----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
> >