Bug#470318: i387 versus SSE versus MPFR (gcc "bug")

["Ondrej Certik" <ondrej@certik.cz>]

Hi Alexei!

On Thu, Apr 17, 2008 at 12:02 PM, Alexei Sheplyakov <varg@theor.jinr.ru> wrote:
[...]
>  > I'd like to trace this bug down and figure out if it's a bug in gcc, or
>  > somewhere else.
>
>  I don't think it's a bug. Rather, it's a wrong expectation from the user side.
>  You are comparing results of FP calculation done on 3 different platforms:
>  ix87, sse2, and MPFR, and expect them to be the same. I think your expectation
>  is wrong.
>
>  That said, I'm not really an expert. Feel free to point out which requirements
>  of IEEE 754 are violated.

Thanks a lot for your reply.

I asked the author of the mpmath library and here is his reply:

http://code.google.com/p/mpmath/issues/detail?id=22&q=debian#c19

Thanks,
Ondrej