From: "H. Peter Anvin" <hpa@zytor.com>
To: James Courtier-Dutton <James@superbug.co.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>, jamal <hadi@cyberus.ca>,
Suresh Siddha <suresh.b.siddha@intel.com>,
Arjan van de Ven <arjan@linux.intel.com>,
Ingo Molnar <mingo@elte.hu>, LKML <linux-kernel@vger.kernel.org>,
Jan Beulich <jbeulich@novell.com>
Subject: Re: i387/FPU init issues...
Date: Sat, 03 May 2008 10:51:58 -0700 [thread overview]
Message-ID: <481CA63E.50504@zytor.com> (raw)
In-Reply-To: <481CA5FC.6020004@superbug.co.uk>
James Courtier-Dutton wrote:
> H. Peter Anvin wrote:
>> Thomas Gleixner wrote:
>>>
>>> Jan, are you sure that P3 knows the P6 NOPs ? AFAICT its P4, but I
>>> have to dig up the manuals.
>>>
>>
>> Pentium III is the P6 core, so it will.
>>
>> Intel explicitly documents "all processors with family 6 or F."
>>
>> -hpa
>
> From the intel manual
>
> 0F 1F /0 NOP
> The multi-byte form of NOP is available on processors with model encoding:
> • CPUID.01H.EAX[Bytes 11:8] = 0110B or 1111B
> The multi-byte NOP instruction does not alter the content of a register
> and will not
> issue a memory operation. The instruction’s operation is the same in
> non-64-bit
> modes and 64-bit mode.
>
I believe that's what I just said...
-hpa
next prev parent reply other threads:[~2008-05-03 17:52 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-03 10:32 i387/FPU init issues jamal
2008-05-03 10:57 ` James Courtier-Dutton
2008-05-03 13:53 ` jamal
2008-05-03 15:31 ` Thomas Gleixner
2008-05-03 17:02 ` jamal
2008-05-03 17:34 ` Ingo Molnar
2008-05-03 17:39 ` Thomas Gleixner
2008-05-04 21:31 ` Jan Engelhardt
2008-05-04 21:37 ` H. Peter Anvin
2008-05-05 13:00 ` Lennart Sorensen
2008-05-03 18:48 ` H. Peter Anvin
2008-05-03 20:07 ` Mikael Pettersson
2008-05-03 20:03 ` H. Peter Anvin
2008-05-03 17:42 ` H. Peter Anvin
2008-05-03 17:50 ` James Courtier-Dutton
2008-05-03 17:51 ` H. Peter Anvin [this message]
2008-05-03 18:18 ` Thomas Gleixner
2008-05-03 18:58 ` Mikael Pettersson
2008-05-03 19:03 ` H. Peter Anvin
2008-05-03 19:08 ` H. Peter Anvin
2008-05-03 19:17 ` Thomas Gleixner
2008-05-03 19:24 ` H. Peter Anvin
2008-05-03 19:54 ` Ingo Molnar
2008-05-03 19:56 ` H. Peter Anvin
2008-05-03 19:49 ` Maciej W. Rozycki
2008-05-03 20:06 ` H. Peter Anvin
2008-05-03 21:17 ` Maciej W. Rozycki
2008-05-03 21:46 ` jamal
[not found] ` <Pine.LNX.4.55.0805032209480.20206@c <1209851170.6972.64.camel@localhost>
2008-05-04 13:08 ` Sebastian Herbszt
2008-05-04 15:06 ` jamal
2008-05-04 15:21 ` Sebastian Herbszt
2008-05-04 20:24 ` Arjan van de Ven
2008-05-04 21:07 ` H. Peter Anvin
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