[MPlayer-dev-eng] Re: [SURVEY] change default CPU target when compiled with runtime CPU detection

[Guillaume POIRIER]

Hi,

On 11/13/05, Ivor Hewitt <ivor at ivor.org> wrote:
[..]

> Guillaume,
>
> VIA C2? I was only aware of the VIA C3 (Samuel2) or the VIA C3-2 (Nehemiah)
> Both of which do have some buzz words.

Woops, I meant C3.. sorry! :-)


> Summary of various C3 features:-
> http://epialinux.org/files/epia_howto/ar01s01.html (ignore the cflags on that
> page)....
>
> Example cflags:-
> http://www.courville.org/phpwiki/Gcc
> http://gentoo-wiki.com/Safe_Cflags
>
> The earlier Ezra core C3's had the missing cmov option and supported
> mmx+3dnow. The easiest option was to simply compile for i586 (with 3dnow) on
> them.

That's what the guy has.


> The later Nehemiah core's did include the cmov and also include sse, so
> compiling i686 is usually easiest.
>
> Also note the suggested "-Os" flag for Ezra due to the tiny CPU cache.

I sent a patch to the guy who has the C3 so that he can test Zuxy's
patch + a modified CFLAGS to set -Os.

Guillaume
--
Reading doesn't hurt, really!
  -- Dominik 'Rathann' Mierzejewski