Re: [LAU] building a debian system for audio

On Thu, 2007-05-24 at 00:48 +0200, Fons Adriaensen wrote:
> On Wed, May 23, 2007 at 04:57:08PM -0500, Jack O'Quin wrote:
>
> > I know less about this than you do, Fons. But, I always seem to end up
> > adding a rint() to statements like that. Not because I understand exactly
> > what is going on, but because otherwise GCC gives me warning messages
> > about casting float to int.
> >
> > What happens, if you change those lines like this?...
> >
> > y = (int) rint((x - a) * b + 0.5f);
>
> Tried both floorf (x + 0.5f) which is my standard way of rounding
> floats, and rint (x). Same results - the problem remains.
>
> What is even more scary is this: adding a extra printf() _after_ all
> the calculations and _after_ a number of other printf() that I have
> been using to see what is happening is enough to remove the error -
> it modifies the values printed by the previous printf()...
> I'm now pretty sure this is the optimiser having an identity
> crisis...

fons, i am suprised that you have not run gcc -S and then diff on the
two asm files yet ....

_______________________________________________
Linux-audio-user mailing list
Linux-audio-user@email-addr-hidden
http://lists.linuxaudio.org/mailman/listinfo.cgi/linux-audio-user
Received on Thu May 24 04:15:02 2007