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Re: -msse producing sse2 instructions
Ross has found the problem.
After rummaging around in the Athlon XP docs, I found out the following:
The Athlon-4 Thunderbird only supports a subset of SSE instructions and
reports no SSE extensions when running cpuid.
The Athlon-MP and the Athlon-4 Mobile supports the full SSE set but not
SSE2.
The Athlon-XP fully supports SSE2.
So it isn't a gcc problem *and* it is a gcc problem, the compiler is ok, but
the "athlon-4" usage throughout the gcc docs is a misnomer and confusing,
and also AMD should use better naming conventions! :-)
Regards
---------------------------------
Q-Games, Dylan Cuthbert.
http://www.q-games.com
----- Original Message -----
From: "Ross Smith" <r-smith@ihug.co.nz>
To: "Dylan Cuthbert" <dylan@q-games.com>; "Andreas Jaeger" <aj@suse.de>
Cc: <gcc@gcc.gnu.org>; "Jan Hubicka" <jh@suse.cz>
Sent: Monday, July 22, 2002 3:55 PM
Subject: Re: -msse producing sse2 instructions
> On Monday, 22 July 2002 02:57, Dylan Cuthbert wrote:
> > Hello there,
> >
> > Well, I run the same executable on an Athlon MP with no problem.
> > When I run on an Athlon 4 gdb tells me the program has crashed with
> > an illegal instruction and displays that instruction I sent earlier.
>
> Is the other system an Athlon Model 4 (a.k.a. Thunderbird) or a Mobile
> Athlon 4 (a.k.a. Mobile Athlon Model 6)? They're not the same chip. The
> former doesn't support SSE, the latter does.
>
> Most people use "Athlon 4" to mean Athlon Model 4, but GCC aids AMD in
> confusing the issue by using "athlon-4" in the architecture options to
> refer to the Mobile Athlon 4.
>
> --
> Ross Smith ..................................... Auckland, New Zealand
> r-smith@ihug.co.nz ...................................................
>
> "A specter is haunting Wall Street; it is the specter
> of honest accounting." -- Arthur D. Hlavaty
>