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Re: Gcc 4.2 miscompiles binutils on x86 and x86-64


On Sun, Apr 30, 2006 at 01:23:20PM +0200, Andreas Schwab wrote:
> "H. J. Lu" <hjl@lucon.org> writes:
> 
> > It looks like a gcc bug to me. Gcc 4.2 miscompiles:
> >
> >      more_than_enough_bits_for_digits
> >         = (number_of_digits_to_use * 3321928 / 1000000 + 1);
> >
> > in atof_generic. When number_of_digits_to_use == 1, gcc 4.2 -O2 gets
> > more_than_enough_bits_for_digits as 4. The correct value is 37.
> 
> Why do you think 3321928 / 1000000 == 36?
> 

It should be number_of_digits_to_use == 11. Just get binutils from
CVS and run "make check" in gas if you want to see it yourselves.


H.J.


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