[LAU] building a debian system for audio

[Jack O'Quin]

On 5/23/07, Fons Adriaensen <fons at kokkinizita.net> 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...

Arrgh!  Put it in a separate function to defeat the optimizer?
-- 
 joq