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From: Uros Bizjak <ubizjak@gmail.com>
Date: Thu, 22 Dec 2022 09:04:33 +0100
Message-ID: <CAFULd4bpFA43-N_RVStUou=Qiu3GQV7ijQu636+Gqanr1t==Lg@mail.gmail.com>
Subject: Re: [PATCH V2 2/2] [x86] x86: Add a new option -mdaz-ftz to enable
 FTZ and DAZ flags in MXCSR.
To: Hongtao Liu <crazylht@gmail.com>
Cc: "H.J. Lu" <hjl.tools@gmail.com>, gcc-patches@gcc.gnu.org, 
	Jakub Jelinek <jakub@redhat.com>
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On Thu, Dec 22, 2022 at 5:40 AM Hongtao Liu <crazylht@gmail.com> wrote:
>
> On Thu, Dec 22, 2022 at 6:46 AM Jakub Jelinek <jakub@redhat.com> wrote:
> >
> > On Wed, Dec 21, 2022 at 02:43:43PM -0800, H.J. Lu wrote:
> > > > > > > > >  Target RejectNegative
> > > > > > > > >  Set 80387 floating-point precision to 80-bit.
> > > > > > > > >
> > > > > > > > > +mdaz-ftz
> > > > > > > > > +Target
> > > > > > > >
> > > > > > > > s/Target/Driver/
> > > > > > > Change to Driver and Got error like:cc1: error: command-line =
option
> > > > > > > =E2=80=98-mdaz-ftz=E2=80=99 is valid for the driver but not f=
or C.
> > > > > > Hi Jakub:
> > > > > >   I didn't find a good solution to handle this error after chan=
ging
> > > > > > *Target* to *Driver*, Could you give some hints how to solve th=
is
> > > > > > problem?
> > > > > > Or is it ok for you to mark this as *Target*(there won't be any=
 save
> > > > > > and restore in cfun since there's no variable defined here.)
> > > > >
> > > > > Since all -m* options are passed to cc1, -mdaz-ftz can't be marke=
d
> > > > > as Driver.  We need to give it a different name to mark it as Dri=
ver.
> > > >
> > > > It is ok like that.
> > > >
> > > >         Jakub
> > > >
> > >
> > > The GCC driver handles -mno-XXX automatically for -mXXX.  Use
> > > a different name needs to handle the negation.   Or we can do somethi=
ng
> > > like this to check for CL_DRIVER before passing it to cc1.
> >
> > I meant I'm ok with -m{,no-}daz-ftz option being Target rather than Dri=
ver.
> >
> Thanks.
> Uros, Is the patch for you?

The original patch is then OK.

Thanks,
Uros.