Re: [dpdk-dev] [PATCH] Make the thash library arch-independent

[Vladimir Medvedkin <medvedkinv@gmail.com>]

2015-07-28 19:05 GMT+03:00 Thomas Monjalon <thomas.monjalon@6wind.com>:

> 2015-07-28 18:33, Vladimir Medvedkin:
> > 2015-07-28 16:47 GMT+03:00 Thomas Monjalon <thomas.monjalon@6wind.com>:
> > > 2015-07-28 09:06, Vladimir Medvedkin:
> > > Please explain how it was broken and how you fixed it.
> > > It would be interesting to know which part is __SSE3__ and __SSE__.
> > >
> >  As mentioned in http://dpdk.org/ml/archives/dev/2015-July/022020.html
> > compilation fails on non x86 architectures( in that case it was tile).
> So I
> > add for optimized code, which uses SSE3 intrinsics, non optimized general
> > version.
>
> I know. I was requesting an updated commit with explanations:
>         build is broken because...
>         x86 version uses SSE3...
>         Some code is enclosed with __SSE__, not __SSE3__ because...
>
Oh, that's my mistake. Will fix this typo in the next patch.

>
> What happens if it is built with SSE3 support but run on
> a CPU without such support?
> Please check how it is done for ACL.
>
> > > > +#ifdef __SSE3__
> > > > +#include <rte_vect.h>
> > > > +#endif /* __SSE3__ */
> > >
> > > Comments after short ifdef block are not needed.
> > >
> > Should I delete it?
>
> Yes please.
>
> > > > +#ifndef XMM_SIZE
> > > > +#define XMM_SIZE     16
> > >
> > > Why is it needed?
> > >
> >  because there is no defines for XMM_SIZE on non X86 architectures
>
> Why XMM_SIZE is needed on non x86 arch?
>
Ok, I will leave union rte_thash_tuple unaligned for non x86 arch