Re: complex numbers

[Paolo Carlini <pcarlini at suse dot de>]

Andreas Klein wrote:

> > Have a look to expand_complex_division in gcc/tree-complex.c, then
> > gcc/toplev.c for flag_complex_divide_method.
> >
> > Andreas, just for curiosity, are you willing to rebuild your gcc
> > with flag_complex_divide_method = 1 and report???
> >    
> Willing is not the problem. But I have only limitet privileges on this
> machine and I am not sure if I can find an other machine with enough
> resources.
>  
I will try to do the same as soon as possible...

> However I think if flag_complex_divide_method = 1 fix the problem it would
> be a good idea to set it by default.
>  
... but notice that this issue is tricky: there are computational issues 
(we are adding
at least a branch for each division) and correctness issues (what about 
C99?)

Exerimenting a bit with those options and functions is only a *very* 
preliminary,
explorative step!

Paolo.

P.S. In gcc3.3.x the relevant functions are in gcc/optabs.c