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Re: [Qemu-devel] [PATCH v3 0/2] AVX2 configure fixes
From: |
Dr. David Alan Gilbert |
Subject: |
Re: [Qemu-devel] [PATCH v3 0/2] AVX2 configure fixes |
Date: |
Mon, 13 Jun 2016 11:58:55 +0100 |
User-agent: |
Mutt/1.6.1 (2016-04-27) |
* Peter Maydell (address@hidden) wrote:
> On 10 June 2016 at 12:16, Dr. David Alan Gilbert (git)
> <address@hidden> wrote:
> > From: "Dr. David Alan Gilbert" <address@hidden>
> >
> > Hi,
> > This pair of patches fixes a couple of issues that we found during test.
> > The first is that the configure test is pessimistic when compiled with -O2,
> > the second is that the explicit 4.9 gcc test is a bit coarse; I've removed
> > that test but beefed up the ./configure test to actually use the avx2
> > intrinsics and that fails in the same way as the main code, so it works
> > in the same way as the explicit check but allows older gcc's to work
> > when -save-temps isn't used.
> >
> > Dave
> >
> > v3
> > Use compile_object rather than compile_prog as suggested by Peter to
> > hopefully fail on his ccache setup.
>
> I ran these patches through my build tests and it all compiled OK,
> so the new configure test does correctly say "no AVX" on this setup.
Thanks for checking.
Dave
>
> thanks
> -- PMM
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK