flac dev - Jun 2021 - Autocorrelation precision insufficient

Op do 24 jun. 2021 om 09:17 schreef Martijn van Beurden <mvanb1 at
gmail.com>:
> - Switch to autoc[] as doubles, but remove current SSE and disable VSX
> intrinsics for someone to update them later (I don't have any POWER8
> or POWER9 hardware to test). This means all platforms will get the
> same compression, but some (with only SSE but not SSE2 or with VSX)
> will see a large slowdown.
I see now that besides routines with SSE intrinsics (which I rewrote
into SSE2) and with VSX intrinsics (which I don't have hardware for)
there is also a open pull request for routines with ARM intrinsics. I
am willing and able to rewrite those if this change is accepted and
merged. I have access to ARMv8 with 32-bit OS, ARMv8 with 64-bit OS,
ARMv6 and I might be able to get hold of ARMv7 hardware.

Martijn,

Just a lone voice here, but I would opt for the best compression on the
most platforms.  As I am one of the people who always run FLAC at the
placebo max compression, my vote will always be for best compression over
any other resource use.

I also can make ARMv7 hardware available to you or I can do any testing you
want on a number of machines.

Thank you for your work!

Cheers,
David

On Fri, Jun 25, 2021 at 3:48 AM Martijn van Beurden <mvanb1 at gmail.com>
wrote:
> Op do 24 jun. 2021 om 09:17 schreef Martijn van Beurden <mvanb1 at
gmail.com
> >:
> > - Switch to autoc[] as doubles, but remove current SSE and disable VSX
> > intrinsics for someone to update them later (I don't have any
POWER8
> > or POWER9 hardware to test). This means all platforms will get the
> > same compression, but some (with only SSE but not SSE2 or with VSX)
> > will see a large slowdown.
>
> I see now that besides routines with SSE intrinsics (which I rewrote
> into SSE2) and with VSX intrinsics (which I don't have hardware for)
> there is also a open pull request for routines with ARM intrinsics. I
> am willing and able to rewrite those if this change is accepted and
> merged. I have access to ARMv8 with 32-bit OS, ARMv8 with 64-bit OS,
> ARMv6 and I might be able to get hold of ARMv7 hardware.
> _______________________________________________
> flac-dev mailing list
> flac-dev at xiph.org
> http://lists.xiph.org/mailman/listinfo/flac-dev
>
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