[PATCH v4 2/2] x86_64: roundeven with sse4.1 support

[H.J. Lu]

On Fri, May 29, 2020 at 1:48 AM Cui, Lili <lili.cui@intel.com> wrote:

>
>
> > -----Original Message-----
> > From: H.J. Lu <hjl.tools@gmail.com>
> > Sent: Thursday, May 28, 2020 8:32 PM
> > To: Florian Weimer <fweimer@redhat.com>; Cui, Lili <lili.cui@intel.com>
> > Cc: H.J. Lu via Libc-alpha <libc-alpha@sourceware.org>; Shen-Ta Hsieh
> > <ibmibmibm.tw@gmail.com>
> > Subject: Re: [PATCH v4 2/2] x86_64: roundeven with sse4.1 support
> >
> > On Thu, May 28, 2020 at 5:22 AM Florian Weimer <fweimer@redhat.com>
> > wrote:
> > >
> > > * H. J. Lu via Libc-alpha:
> > >
> > > >> Here is a benchmark result on my AMD Ryzen 9 3900X system:
> > > >
> > > > Since we don't know or may not care SSE4 machines without AVX,
> > > > should we make it to AVX only?
> > >
> > > What about Goldmont/Tremont?  Those are current CPUs which do not
> > > support AVX, but I think they have sufficient SSE4 support levels for
> > > this change.
> > >
> >
> > Good point.  Lili, please collect glibc micro benchmark
> roundeven/roundevenf
> > data before and after:
> >
> > https://sourceware.org/pipermail/libc-alpha/2020-May/113533.html
> >
> > on Tremont.
> >
> > --
> > H.J.
>
> Hi H.J,
>
> Result is here.
> benchmark result before this commit on Tremont
>
>
>
> benchmark result after this commit on Tremont
>
>
>
>

Hi Lili,

The results are empty.

-- 
H.J.