[Bug ports/2749] powerpc32 does not build --without-fp

["sjmunroe at us dot ibm dot com" <sourceware-bugzilla at sourceware dot org>]

------- Additional Comments From sjmunroe at us dot ibm dot com  2006-09-15 21:34 -------
>glibc on many arches doesn't have a standard conforming fma(3) - for float
>just using double multiplication and addition should be good enough, but
>especially for long double the current implementation is wrong.  So, if there was
>a soft-fp FMA that could be used on all the targets that can't do this in
>hardware, it would be great.

I would just like to separate the the problem of powerpc long double soft-fp
which does not even build in the upstream (this bug) from the pan-galatic
problem of soft-fp fma. 

This fix has taken too long already and I don't want to delay this fix while
solving a different problem. 

I am not saying we should not solve the genrral fma problem. Just separately and
without delaying this fix.

As I understand it we need the soft-fp fix for FP_SUB_Q in the glibc upstream
before we can propagate the fix to gcc-4.2, before David can submit the rest of
the gcc soft-fp fixes for gcc-4.2. We are running out of time for gcc-4.2.

Once that is done we can look at general fma.

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=2749

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