[llvm-dev] Vectorization of math function failed?

[Florian Hahn via llvm-dev]

Hi,

> On Sep 1, 2020, at 10:26, Venkataramanan Kumar via llvm-dev <llvm-dev at lists.llvm.org> wrote:
> 
> Hi Alexandre,
> 
> On Tue, 1 Sep, 2020, 2:21 pm Alexandre Bique, <bique.alexandre at gmail.com <mailto:bique.alexandre at gmail.com>> wrote:
> On Tue, Sep 1, 2020 at 9:07 AM Venkataramanan Kumar
> <venkataramanan.kumar.llvm at gmail.com <mailto:venkataramanan.kumar.llvm at gmail.com>> wrote:
> >   Hi Alexandre,
> 
> Hi Venkataramanan,
> 
> > I am not sure if we can generate vector calls to GlibC libmvec.
> Is the support for libmvec on the roadmap? If not how to add it?
> 
> I also wanted to check with others here,  if we can add support for vector routines in Glibc libmvec. 
> 
> Libmvec may not be available in machines which uses lower versions of glibc. We may have to take care of generating calls only when we detect libmvec and also meet required ISA requirements. 
> 
> Otherwise is it ok to generate vector calls under a flag?

The existing vector library variants are enabled with a flag (`-vector-library`) on the LLVM side as mentioned earlier. I think it would make sense to add support for libmvec in a similar fashion. That should be relatively straight-forward.

Cheers,
Florian
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