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Re: version typeinfo for 128bit types
- From: Jakub Jelinek <jakub at redhat dot com>
- To: Michael Meissner <meissner at linux dot vnet dot ibm dot com>, Marc Glisse <marc dot glisse at inria dot fr>, Jonathan Wakely <jwakely dot gcc at gmail dot com>, gcc-patches <gcc-patches at gcc dot gnu dot org>, libstdc++ <libstdc++ at gcc dot gnu dot org>
- Date: Tue, 22 Apr 2014 22:29:55 +0200
- Subject: Re: version typeinfo for 128bit types
- Authentication-results: sourceware.org; auth=none
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- Reply-to: Jakub Jelinek <jakub at redhat dot com>
On Tue, Apr 22, 2014 at 04:26:23PM -0400, Michael Meissner wrote:
> On Tue, Apr 22, 2014 at 10:06:19PM +0200, Marc Glisse wrote:
> > Hello,
> >
> > as written in the PR, my patch seems wrong for platforms like
> > powerpc that already had the __float128 typeinfo for long double
> > with a different version. The following patch regtested fine on
> > x86_64, and a hackish cross-build shows that float128.ver is ignored
> > on powerpc (good).
> >
> > 2014-04-23 Marc Glisse <marc.glisse@inria.fr>
> >
> > PR libstdc++/43622
> > * config/abi/pre/float128.ver: New file.
> > * config/abi/pre/gnu.ver (CXXABI_1.3.9): Move __float128 typeinfo to
> > the new file.
> > * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
> > * configure.ac: Use float128.ver when relevant.
> > * configure: Regenerate.
>
> Note, I hope to restart work to add __float128 as IEEE 128-bit floating point
> in the PowerPC shortly. I had done about 1/2 of the work in a sandbox, and I
> needed to put it aside to look at other issues, and it has bubbled up to be
> high on my list of priorities.
But then the question is what letter to use for the mangling of it, when
g is already used for the IBM "double double" long double on PowerPC.
Jakub