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From:	"Chris January" <chris AT atomice DOT net>
To:	"Cygwin AT Cygwin DOT Com" <cygwin AT cygwin DOT com>
Subject:	RE: /proc/cpuinfo
Date:	Sun, 11 May 2003 10:22:39 +0100
Message-ID:	<ICEBIHGCEJIPLNMBNCMKAELNCFAA.chris@atomice.net>
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>  > > The interesting field is flags, which we use in our configure script
>  > > to check for processor capabilities and later optimize for
> the ones we
>  > > find.  Cygwin detects/displays less flags than Linux:
>  > >
>  > > flags           : fpu vme de pse tsc msr mce cx8 pge mmx
>  > > flags		: fpu vme de pse tsc msr mce cx8 pge mmx syscall
>  > > 3dnowext 3dnow k6_mtrr
>  > >
>  > > This is a pity as I now loose 3dnow and mtrr optimizations without
>  > > manual tweaking.
>  > >
>  > > I know that /proc/cpuinfo is very new on Cygwin.  Is the lack of some
>  > > flags a bug, or is this just implemented in a different way.  Any
>  > > chance of supporting those flags in the future?
>  > >
>  > > If somebody decides to extends /proc/cpuinfo that would be
>  > > tremendously appreciated.  I'm not expecting anything, of
> course, just
>  > > hoping.
>  > I used the Intel list of flags, but the list is slightly
> different on AMD
>  > (e.g. 3dnow). If you can find and send me a list of the cpuid
> features flags
>  > for AMD processors I'll add this in.
>
> Here is a link I was told about:
>
> http://www.sandpile.org/ia32/cpuid.htm
>
> and the other one posted before for easy reference:
>
> http://www.amd.com/us-en/assets/content_type/white_papers_and_tech
> _docs/20734.pdf
>
> Please let me know if you need more information, I'll do my best to
> provide it to you.  If you should get around to implementing something
> I would very much appreciate if you could drop me a short note and I
> will gladly help you with testing.
Thank you for the links. I'll try to implement this in the next couple of
weeks.

Chris


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