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Re: the difference between CPU architecture
- From: Mike Frysinger <vapier at gentoo dot org>
- To: libc-alpha at sources dot redhat dot com
- Cc: eme at v003 dot vaio dot ne dot jp
- Date: Mon, 3 Jan 2005 00:41:15 -0500
- Subject: Re: the difference between CPU architecture
- Organization: wh0rd.org
- References: <20050103143338.eme@v003.vaio.ne.jp>
On Monday 03 January 2005 12:33 am, eme@v003.vaio.ne.jp wrote:
> <snip>
> What I wanna know about, is the difference when I choose
> "-march=c3-2,-march=i686" and "-march=c3,-march=i486".
> Yes, the difference between the C3(Nehemiah core) and the
> C3(not Nehemiah core).
> <snip>
> # So I thought this might be a libc question.
it's not, this is a gcc question
the easiest way to get a clear answer is to look at the gcc source code
march basically says 'enable all optimizations that this CPU is known to
support'
-mike