Re: Firefox 2.0.0.7 has a very serious calculation bug

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Not so much it required such a long thread.

On Fri, 28 Sep 2007 15:29:18 -0400 Rodrigo Barbosa
<rodrigob () darkover org> wrote:
> On Fri, Sep 28, 2007 at 09:09:02PM +0200, Michal Zalewski wrote:
> > On Sat, 29 Sep 2007, Jimby Sharp wrote:
> >
> > > I don't get the same from C-style double arithmetics. Could
> you provide
> > > a sample code that you believe should show the same behavior?
> >
> > If you don't, it's presumably because the subtraction is
> optimized out by
> > the compiler, or because you printf() with an insufficient
> precision in
> > format spec. The following should do the trick:
> >
> > volatile double a = 5.2;
> > volatile double b = 0.1;
> > main() { printf("%.16lf\n",a-b); }
>
> Confirmed here with:
>
> gcc (GCC) 4.1.1 20070105 (Red Hat 4.1.1-52)
>
> Actually quite interesting.
>
> --
> Rodrigo Barbosa
> "Quid quid Latine dictum sit, altum viditur"
> "Be excellent to each other ..." - Bill & Ted (Wyld Stallyns)
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