[Bug middle-end/116891] [12/13/14/15 Regression] invalid optimization of -fma(-x,x,-z) when -03 and -frounding-math are used

[walter.mascarenhas at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116891

--- Comment #8 from Walter Mascarenhas <walter.mascarenhas at gmail dot com> ---
sorry, I did not pay enough attention.

On Tue, Oct 1, 2024 at 5:18 AM pinskia at gcc dot gnu.org <
gcc-bugzi...@gcc.gnu.org> wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116891
>
> --- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
> (In reply to Walter Mascarenhas from comment #6)
> > Hi Andrew,
> >
> >    The proper optimization in this case would be to use the instruction
> > vfnmsub132pd followed by a change of sign. It could be something like
>
>
> That is exactly what I Said just using internals of gcc.
>
> Note bugzilla is usually a mix of both user facing information and
> internals of
> what needs to be done inside gcc.
>
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