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From "Xiao-Feng Li" <xiaofeng...@gmail.com>
Subject Re: FW: [general][performance] Stefan Krause's Harmony performance evaluation
Date Mon, 07 Jul 2008 03:57:48 GMT
On Mon, Jul 7, 2008 at 11:31 AM, xiaoming gu <xiaoming.gu@gmail.com> wrote:
> With testing, I find SAR is the "signed shift right" to replace div. So the
> comments about SAR and SHR in Enc_defs.h are misplaced.

So I assume you will correct it in your patch. :)

Thanks,
xiaofeng

> Xiaoming
>
> On Mon, Jul 7, 2008 at 8:24 AM, xiaoming gu <xiaoming.gu@gmail.com> wrote:
>
>> Hi, everyone. Which one is signed shift right, SAR or SHR? It seems there
>> are some conflicts between
>> the definitions (in Enc_defs.h) and the usages (in
>> Ia32InstCodeSelector.cpp). Thanks.
>>
>> Xiaoming
>>
>>
>> On Sun, Jul 6, 2008 at 4:47 PM, Egor Pasko <egor.pasko@gmail.com> wrote:
>>
>>> On the 0x479 day of Apache Harmony xiaoming gu wrote:
>>> > Aleksey, one question. Is there any easy way to know which binary
>>> > instructions are generated at runtime? Thanks.
>>>
>>> Use command line options [1].
>>>
>>> I suggest this set:
>>>
>>> -Xem:server_static -XX:jit.p.filter=.main
>>> -XX:jit.p.arg.log=ct,irdump,dotdump
>>>
>>>
>>> [1] http://harmony.apache.org/cmd_options.html
>>>
>>>
>>> > Xiaoming
>>> >
>>> > On Fri, Jul 4, 2008 at 6:17 PM, xiaoming gu <xiaoming.gu@gmail.com>
>>> wrote:
>>> >
>>> > > Got it. I'll take the 1st way and the left work is pretty clear.
>>> Thanks.
>>> > >
>>> > > Xiaoming
>>> > >
>>> > >
>>> > > On Fri, Jul 4, 2008 at 6:11 PM, Aleksey Shipilev <
>>> > > aleksey.shipilev@gmail.com> wrote:
>>> > >
>>> > >> On Fri, Jul 4, 2008 at 2:04 PM, Aleksey Shipilev
>>> > >> <aleksey.shipilev@gmail.com> wrote:
>>> > >> > do "shl reg,<value>"
>>> > >> Of course, it's "SHIFT RIGHT", so "shr reg, <value>".
>>> > >>
>>> > >> Thanks,
>>> > >> Aleksey.
>>> > >>
>>> > >
>>> > >
>>>
>>> --
>>> Egor Pasko
>>>
>>>
>>
>



-- 
http://xiao-feng.blogspot.com

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