From: Avi Kivity <avi@redhat.com>
To: Aurelien Jarno <aurelien@aurel32.net>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: [Qemu-devel] Re: [Qemu-commits] [COMMIT a4b18c6] tcg/x86_64: generated dec/inc instead of sub/addwhen possible
Date: Mon, 28 Sep 2009 09:51:12 +0200 [thread overview]
Message-ID: <4AC06AF0.7010300@redhat.com> (raw)
In-Reply-To: <200909271613.n8RGDCLo020606@d01av04.pok.ibm.com>
On 09/27/2009 06:13 PM, Anthony Liguori wrote:
> From: Aurelien Jarno<aurelien@aurel32.net>
>
Intel recommends not using inc/dec. Since these instructions don't
update all of the flags, they cannot be issued in parallel to previous
instructions that do.
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
next parent reply other threads:[~2009-09-28 7:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200909271613.n8RGDCLo020606@d01av04.pok.ibm.com>
2009-09-28 7:51 ` Avi Kivity [this message]
2009-09-28 8:21 ` [Qemu-devel] Re: [Qemu-commits] [COMMIT a4b18c6] tcg/x86_64: generated dec/inc instead of sub/addwhen possible Laurent Desnogues
2009-09-29 15:51 ` Filip Navara
2009-09-29 15:53 ` Laurent Desnogues
2009-09-29 15:55 ` Filip Navara
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