832x: MATH_EMUL

832x: MATH_EMUL

[Heiko Schocher]

Hello,

I actually porting a mpc8321 based port, and because there is no FPU
on this CPU, I activated MATH_EMUL, as all other mpc832x ports did.

Is there something like a counter, which counts how many times this
Exception occurs?

Thanks.

bye
Heiko
-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

Re: 832x: MATH_EMUL

[Kumar Gala]

On Aug 21, 2009, at 1:39 AM, Heiko Schocher wrote:

> Hello,
>
> I actually porting a mpc8321 based port, and because there is no FPU
> on this CPU, I activated MATH_EMUL, as all other mpc832x ports did.
>
> Is there something like a counter, which counts how many times this
> Exception occurs?

Geert published some patches that did something like this but there  
isn't upstream as far as I know at this point.

- k

Re: 832x: MATH_EMUL

[Detlev Zundel]

Hi Kumar,

> On Aug 21, 2009, at 1:39 AM, Heiko Schocher wrote:
>
>> Hello,
>>
>> I actually porting a mpc8321 based port, and because there is no FPU
>> on this CPU, I activated MATH_EMUL, as all other mpc832x ports did.
>>
>> Is there something like a counter, which counts how many times this
>> Exception occurs?
>
> Geert published some patches that did something like this but there
> isn't upstream as far as I know at this point.

Were there any technical reasons or did it just slip into the cracks?
In my opinion such a counter would be *very* helpful to judge the
performance impact one suffers instead of living in ignorant bliss.

Cheers
  Detlev

--
DENX Software Engineering GmbH,      MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich,  Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: dzu@denx.de

Re: 832x: MATH_EMUL

[Geert Uytterhoeven]

On Fri, 21 Aug 2009, Kumar Gala wrote:
> On Aug 21, 2009, at 1:39 AM, Heiko Schocher wrote:
> >I actually porting a mpc8321 based port, and because there is no FPU
> >on this CPU, I activated MATH_EMUL, as all other mpc832x ports did.
> >
> >Is there something like a counter, which counts how many times this
> >Exception occurs?
> 
> Geert published some patches that did something like this but there isn't
> upstream as far as I know at this point.

It's upstream: 80947e7c99c29ce3a78bdc1933b310468455a82f

With kind regards,

Geert Uytterhoeven
Software Architect
Techsoft Centre

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Re: 832x: MATH_EMUL

[Heiko Schocher]

Hello Geert,

Geert Uytterhoeven wrote:
> On Fri, 21 Aug 2009, Kumar Gala wrote:
>> On Aug 21, 2009, at 1:39 AM, Heiko Schocher wrote:
>>> I actually porting a mpc8321 based port, and because there is no FPU
>>> on this CPU, I activated MATH_EMUL, as all other mpc832x ports did.
>>>
>>> Is there something like a counter, which counts how many times this
>>> Exception occurs?
>> Geert published some patches that did something like this but there isn't
>> upstream as far as I know at this point.
> 
> It's upstream: 80947e7c99c29ce3a78bdc1933b310468455a82f

Thanks for this info!

bye
Heiko
-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany