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From: Hongtao Liu <crazylht@gmail.com>
Date: Thu, 12 Aug 2021 12:46:25 +0800
Message-ID: <CAMZc-bwtMOSvsjLJSf99spSfm1UbSOhXYJ2g_BjgFY3EgAN1OQ@mail.gmail.com>
Subject: Re: [PATCH] Extend ldexp{s, d}f3 to vscalefs{s, d} when TARGET_AVX512F
 and TARGET_SSE_MATH.
To: Uros Bizjak <ubizjak@gmail.com>
Cc: liuhongt <hongtao.liu@intel.com>, 
 "gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>
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On Wed, Aug 11, 2021 at 7:16 PM Uros Bizjak <ubizjak@gmail.com> wrote:
>
> On Wed, Aug 11, 2021 at 8:36 AM Uros Bizjak <ubizjak@gmail.com> wrote:
> >
> > On Tue, Aug 10, 2021 at 2:13 PM liuhongt <hongtao.liu@intel.com> wrote:
> > >
> > > Hi:
> > >   AVX512F supported vscalefs{s,d} which is the same as ldexp except the second operand should be floating point.
> > >   Bootstrapped and regtested on x86_64-linux-gnu{-m32,}.
> > >
> > > gcc/ChangeLog:
> > >
> > >         PR target/98309
> > >         * config/i386/i386.md (ldexp<mode>3): Extend to vscalefs[sd]
> > >         when TARGET_AVX512F and TARGET_SSE_MATH.
> > >
> > > gcc/testsuite/ChangeLog:
> > >
> > >         PR target/98309
> > >         * gcc.target/i386/pr98309-1.c: New test.
> > >         * gcc.target/i386/pr98309-2.c: New test.
> >
> > OK.
>
> Actually, we should introduce a scalar version of avx512f_vmscalef, so
> we can avoid all subreg conversions with the vector-merge (VM)
> version, and will also allow memory in operand 2.
>
> Please test the attached incremental patch.
>
Bootstrapped and regtested on x86_64-linux-gnu{-m32,} on CLX.
tests is fine.
> Uros.



-- 
BR,
Hongtao