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Re: [Qemu-devel] Re: [Qemu-commits] [COMMIT a4b18c6] tcg/x86_64: genera
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From: |
Filip Navara |
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Subject: |
Re: [Qemu-devel] Re: [Qemu-commits] [COMMIT a4b18c6] tcg/x86_64: generated dec/inc instead of sub/addwhen possible |
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Date: |
Tue, 29 Sep 2009 17:55:36 +0200 |
On Tue, Sep 29, 2009 at 5:53 PM, Laurent Desnogues
<address@hidden> wrote:
> On Tue, Sep 29, 2009 at 5:51 PM, Filip Navara <address@hidden> 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?
In QEMU/TCG context. It was some synthetic benchmark, most probably Dhrystone.
Best regards,
Filip Navara