Re: subarchitectures (was Re: What to do with optimization flags ? )

[Ben Collins <bcollins@debian.org>]

On Tue, Dec 05, 2000 at 12:57:32PM -0500, Camm Maguire wrote:
> 
> Greetings!  I'm having similar issues with the latest atlas.  Where
> can I find out a list of the allowed subdirectories under /usr/lib,
> and what cpu's those directories cover?  Specifically, is the Athlon a
> 686? Is a PII a 686?  I assume a PIII is a 686.  All three of these
> would have separate atlas libs, as would the K6, whicn I'm guessing
> counts as a 586, but is different atlas-wise from a pentium.

There are several CPU class subdirectories, and they are:

  i386, i486, i586, i686

There are also extra CPU capabilities flags, which are subdirectories
aswell, and they are defined in glibc as:

static const char x86_cap_flags[][7] =
  {
    "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
    "cx8", "apic", "10", "sep", "mtrr", "pge", "mca", "cmov",
    "pat", "pse36", "psn", "19", "20", "21", "22", "mmx",
    "osfxsr", "xmm", "26", "27", "28", "29", "30", "amd3d"
  };

These coincide with some compiler flags. You can see "amd3d" and "mmx" are
easily identified. I do not know what the rest are. SO you could do
something like:

/lib/mmx/

/lib/i686/amd3d/

/lib/i686/apic/

Have at it :)

-- 
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