[oe] [RFC] Naming of packages for x86 archs
Thomas Kunze
thommycheck at gmx.de
Fri Jul 25 13:17:07 UTC 2008
Marcin Juszkiewicz wrote:
> Hi
>
> OpenEmbedded supports granulated packaging and tuning to get as much as
> possible from each CPU. This works fine for ARM and PowerPC platforms as
> their cores are easy to recognize (armv4t, armv5te, armv6, armv7a for
> ARM). The problem lies in x86 land where there is no such order in
> cores...
>
> Currently we have following tunings for x86:
>
> name | -march value | packaging
> ---------------------------------------------
> athlonmp | i686 | i686
> c3 | c3 | i586
> geodelx | k6-2 | geode
> pentium | pentium | i586
> prescott | prescott | i686p4c
> pentiumpro | pentiumpro | i686
> x86-nocona | nocona | NOT SET
> x86-prescott | prescott | NOT SET
> x86 | i486 | i486
>
> And we have Progear machine which use Transmeta Crusoe which can have
> own optimisations (I have to unpack mine one day and build something for
> it).
>
> I would like to start discussion about naming for x86 package archs. One
> of propositions in past was use something like "tune-prescott" does -
> adding description after arch name (i686p4c). This way we can have list
> like:
>
> i486
>
> i586 - pentium
> i586mmx - pentium with mmx, Geode GX1
> i586c3 - VIA C3
> i586k6 - AMD K6
> i586k62 - AMD K6-2, Geode LX
> i586geode - Geode LX with gcc 4.3 or patched 4.2
>
> i686 - pentium pro, Crusoe TM5xxxx (MMX only)
> i686p2 - pentium II
> i686sse - pentium III
> i686sse2 - pentium-m, Transmeta Efficeon
> i686sse3 - pentium with SSE3, VIA C7
> i686p4 - pentium 4 cores
> i686p4c - celeron with pentium 4 core
> i686c32 - VIA Eden, Nehemiah (-march=c3-2)
> i686ath - AMD Athlon Thunderbird core
> i686axp - AMD Athlon XP cores
> i686asse3 - AMD64 cpus in 32bit mode (those with SSE3 support)
>
> Names are ofcourse to define in more sane way but to make it easy to
> recognize does package will work on target platform or not. So if my
> target platform cpu will handle sse1/2/3 and 3dnow then I can run
> everything from above list, but if it GeodeLX then I can run every i586
> variants on it.
>
> What does other developer think about it? Does it have a sense?
>
>
I'm not really into x86 for oe or details of x86 cpus, but this sounds
as a good idea.
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