Re: [gem5-users] Adding a new resource

[Pawan Joshi]

Yes, that makes it clear now. Thanks a lot for your help!

Pawan

Pawan B Joshi
Electrical and Computer Engineering
The University of Texas-Austin

On Sat, Mar 17, 2018 at 11:00 PM, Tariq Azmy 
wrote:

> By "resources", I assume you are referring to each of the stage in the
> out-of-order pipeline? Those stages' implementation codes (fetch, decode,
> rename, etc..) are located inside the cpu/o3 directory. Branch prediction
> typically is done in fetch stage, so if you look inside the fetch.hh source
> code, it includes the header file of "cpu/pred/bpred_unit.hh". So if go
> up one level, to the cpu/pred directory, that is where the branch predictor
> implementation code is located.
>
> As far as value predictor, I am not sure how you are going to implement
> it, but it probably needs to work with or link to other stages/resources
> such as iew, instruction queue, rob..
>
> Hope this helps.
>
> On Sat, Mar 17, 2018 at 3:44 PM, Pawan Joshi 
> wrote:
>
>> Okay, that makes sense. But isn't there a separate "resources" directory
>> where I can see stuff like branch predictors implemented? I don't have any
>> br. pred. in my current cpu/o3 directory.
>> I wanted that as I can get a template to work with.
>>
>>
>> Pawan
>>
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>
>
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Re: [gem5-users] Adding a new resource

[Tariq Azmy]

By "resources", I assume you are referring to each of the stage in the
out-of-order pipeline? Those stages' implementation codes (fetch, decode,
rename, etc..) are located inside the cpu/o3 directory. Branch prediction
typically is done in fetch stage, so if you look inside the fetch.hh source
code, it includes the header file of "cpu/pred/bpred_unit.hh". So if go up
one level, to the cpu/pred directory, that is where the branch predictor
implementation code is located.

As far as value predictor, I am not sure how you are going to implement it,
but it probably needs to work with or link to other stages/resources such
as iew, instruction queue, rob..

Hope this helps.

On Sat, Mar 17, 2018 at 3:44 PM, Pawan Joshi 
wrote:

> Okay, that makes sense. But isn't there a separate "resources" directory
> where I can see stuff like branch predictors implemented? I don't have any
> br. pred. in my current cpu/o3 directory.
> I wanted that as I can get a template to work with.
>
>
> Pawan
>
> ___
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> gem5-users@gem5.org
> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
>
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Re: [gem5-users] Adding a new resource

[Pawan Joshi]

Okay, that makes sense. But isn't there a separate "resources" directory
where I can see stuff like branch predictors implemented? I don't have any
br. pred. in my current cpu/o3 directory.
I wanted that as I can get a template to work with.


Pawan
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Re: [gem5-users] Adding a new resource

[Kleovoulos Kalaitzidis]

Hello, 
if I clearly understood your question you can do that in the SConscript file in 
the o3 folder. For any new structure you want to add create the equivalent 
files .hh/.cc (and maybe _impl.hh) and make this structure 
compile by including a corespondent line in the SConscript file. And then 
normally use it within the other structures in the pipeline. 
Hope it helps. 

-- 
Kleovoulos Kalaitzidis 
Doctorant - Équipe PACAP 

Centre de recherche INRIA Rennes - Bretagne Atlantique 
Bâtiment 12E, Bureau E321, Campus de Beaulieu, 
35042 Rennes Cedex, France 

- Original Message -

> From: "Pawan Joshi" <pawanjoshi...@gmail.com>
> To: gem5-users@gem5.org
> Sent: Friday, March 16, 2018 6:54:33 PM
> Subject: [gem5-users] Adding a new resource

> Hello all
> I am working on adding a new value predictor structure in the O3 CPU, but
> cannot seem to find the 'resources' directory where I have to code in my
> model. Where will this directory be - src/cpu/o3 doesn't have it.

> Thanks
> Pawan

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[gem5-users] Adding a new resource

[Pawan Joshi]

Hello all
I am working on adding a new value predictor structure in the O3 CPU, but
cannot seem to find the 'resources' directory where I have to code in my
model. Where will this directory be - src/cpu/o3 doesn't have it.

Thanks
Pawan
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