Message-ID: <47DC2F08.9080004@zytor.com>
Date: Sat, 15 Mar 2008 21:18:16 +0100
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Alexander van Heukelum <heukelum@mailshack.com>
CC: Ingo Molnar <mingo@elte.hu>, Andi Kleen <andi@firstfloor.org>,
       Jeremy Fitzhardinge <jeremy@goop.org>,
       Thomas Gleixner <tglx@linutronix.de>,
       Alexander van Heukelum <heukelum@fastmail.fm>,
       LKML <linux-kernel@vger.kernel.org>
Subject: Re: K8, EFFICEON and CORE2 support the cmovxx instructions.
References: <20080312200128.GA24983@mailshack.com> <47DABEFB.3050704@goop.org> <1205523826.7441.1242464129@webmail.messagingengine.com> <20080314195520.GV2522@one.firstfloor.org> <1205530409.27413.1242484373@webmail.messagingengine.com> <20080315191946.GA21817@mailshack.com>
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Alexander van Heukelum wrote:
> K8, EFFICEON and CORE2 support the cmovxx instructions.
> 
> Instead of listing the cpu's that have support for the
> cmovxx instructions, list the cpu's that don't.
> 
> Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
> ---
> 
> A bit of playing resulted in:
> 
> CPUS="M386 M486 M586 M586TSC M586MMX M686 MPENTIUMII MPENTIUMIII"
> CPUS=$CPUS" MPENTIUMM MPENTIUM4 MK6 MK7 MK8 MCRUSOE MEFFICEON"
> CPUS=$CPUS" MWINCHIPC6 MWINCHIP2 MWINCHIP3D MGEODEGX1 MGEODE_LX"
> CPUS=$CPUS" MCYRIXIII MVIAC3_2 MVIAC7 MPSC MCORE2"
> 
> for cpu in $CPUS
> do
>         echo "CONFIG_${cpu}=y" > testconfig
>         make ARCH=i386 allnoconfig KCONFIG_ALLCONFIG=testconfig > /dev/null
>         echo ${cpu} >> result
>         grep X86_CMOV .config >> result
>         echo >> result
> done
> 
> I'm quite sure that K8, EFFICEON and CORE2 support HAVE_CMOV, but
> they did not set X86_CMOV.
> 

Crusoe has CMOV as well.

	-hpa
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