From: Laurent Desnogues <laurent.desnogues@gmail.com>
To: Filip Navara <filip.navara@gmail.com>
Cc: Avi Kivity <avi@redhat.com>,
Aurelien Jarno <aurelien@aurel32.net>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] Re: [Qemu-commits] [COMMIT a4b18c6] tcg/x86_64: generated dec/inc instead of sub/addwhen possible
Date: Tue, 29 Sep 2009 17:53:57 +0200 [thread overview]
Message-ID: <761ea48b0909290853j17dd666bjf177a6165b89a8b9@mail.gmail.com> (raw)
In-Reply-To: <5b31733c0909290851h30e05edauf5c31a3d18fbfbf9@mail.gmail.com>
On Tue, Sep 29, 2009 at 5:51 PM, Filip Navara <filip.navara@gmail.com> wrote:
>
> I vaguely remember measuring it and the results were different on
> Pentium IV-based and Pentium M-based processors. On one of them
> inc/dec was faster, while on the other it was add/sub. I can't
> remember which one had which results though.
Do you mean in a QEMU context or something else? If that
was with QEMU, was the program significantly large?
Laurent
next prev parent reply other threads:[~2009-09-29 16:46 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 ` [Qemu-devel] Re: [Qemu-commits] [COMMIT a4b18c6] tcg/x86_64: generated dec/inc instead of sub/addwhen possible Avi Kivity
2009-09-28 8:21 ` Laurent Desnogues
2009-09-29 15:51 ` Filip Navara
2009-09-29 15:53 ` Laurent Desnogues [this message]
2009-09-29 15:55 ` Filip Navara
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