On Tue, Sep 7, 2021 at 8:29 PM Jakub Jelinek via Gcc-patches
<gcc-patches@gcc.gnu.org> wrote:
>
> On Mon, Sep 06, 2021 at 10:58:53AM +0200, Jakub Jelinek via Gcc-patches wrote:
> > On Mon, Sep 06, 2021 at 08:49:27AM +0100, Iain Sandoe wrote:
> > > > Ok. The *.ver changes are still needed (see above), but that can be
> > > > done
> > > > incrementally.
> > >
> > > I can commit the .ver change if that’s approved, sure - for the record I
> > > haven’t checked
> > > any targets other than Darwin and Linux.
> >
> > The following patch exports it for Linux from config/i386/*.ver where it
> > IMNSHO belongs, aarch64 already exports some of those at GCC_11* and other
> > targets might add them at completely different gcc versions.
> >
> > Tested on x86_64-linux, verified the right symbols are exported, ok for
> > trunk?
>
> Bootstrapped/regtested on x86_64-linux and i686-linux successfully, though
> actually __divhc3 and __mulhc3 aren't exported, they aren't even compiled
> into libgcc_s.so.1. Is that on purpose (large functions very unlikely being
> used in most of the programs)? If yes, I'll drop the __divhc3/__mulhc3
> lines. If not,
> LIB2ADD_ST += $(addprefix $(srcdir)/config/i386/, $(libgcc2-hf-extras))
> should be changed to
> LIB2ADD += $(addprefix $(srcdir)/config/i386/, $(libgcc2-hf-extras))
> (untested), or even the LIB2FUNCS_EXCLUDE dropped?
>
I think it's not, let me try to verify it.
> > 2021-09-06 Jakub Jelinek <ja...@redhat.com>
> > Iain Sandoe <i...@sandoe.co.uk>
> >
> > * config/i386/libgcc-glibc.ver: Add %inherit GCC_12.0.0 GCC_7.0.0
> > and export *hf* and *hc* functions at GCC_12.0.0.
> >
> > --- libgcc/config/i386/libgcc-glibc.ver.jj 2021-01-05 00:13:58.142298913
> > +0100
> > +++ libgcc/config/i386/libgcc-glibc.ver 2021-09-06 10:47:52.244726676
> > +0200
> > @@ -194,3 +194,23 @@ GCC_4.8.0 {
> > __cpu_indicator_init
> > }
> > %endif
> > +
> > +%inherit GCC_12.0.0 GCC_7.0.0
> > +GCC_12.0.0 {
> > + __divhc3
> > + __mulhc3
> > + __eqhf2
> > + __nehf2
> > + __extendhfdf2
> > + __extendhfsf2
> > + __extendhftf2
> > + __extendhfxf2
> > + __fixhfti
> > + __fixunshfti
> > + __floattihf
> > + __floatuntihf
> > + __truncdfhf2
> > + __truncsfhf2
> > + __trunctfhf2
> > + __truncxfhf2
> > +}
>
> Jakub
>
--
BR,
Hongtao
