is gcc optimized for g4 processors ?

is gcc optimized for g4 processors ?

[Stephane GEORGES]

I'm doing performance tests on my G4 - 400 AGP.
I would like to know if gcc (egcs-2.91.66) can be optimized for G4 processor.

Does -mcpu=7400 exists ?

--

/====================================================================/|
| Stephane GEORGES                     |                             ||
| DALiM SOFTWARE GmbH      R&D         |    Tel: +49 7851 9196 40    ||
| Strassburger Str.6                   |    Fax: +49 7851 7357 6     ||
| D-77696                              |                             ||
| Kehl-Sundheim (Germany)              |    E-mail: sg@dalim.de      ||
|____________________________________________________________________|/


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Re: is gcc optimized for g4 processors ?

[Holger Bettag]

Stephane GEORGES <sg@dalim.de> writes:

>
>
> I'm doing performance tests on my G4 - 400 AGP.
> I would like to know if gcc (egcs-2.91.66) can be optimized for G4 processor.
>
> Does -mcpu=7400 exists ?
>
I don't think the option is in there yet. But -mcpu=604e should fit the 7400
quite well, for both integer and floating point code. The only big scheduling
difference would be for integer multiplications.

(The 604e has a separate, pipelined integer multiplier, while the 7400's is
non-pipelined and blocks one of the integer units, but has an early-exit-
capability if one the factors has less than 32 significant bits.)

  Holger


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Re: is gcc optimized for g4 processors ?

[René Pachernegg]

Stephane GEORGES wrote:
>
> I'm doing performance tests on my G4 - 400 AGP.
> I would like to know if gcc (egcs-2.91.66) can be optimized for G4 processor.
>
> Does -mcpu=7400 exists ?
It doesnt seem to exist.
Have a look at http://gcc.gnu.org/onlinedocs/gcc_2.html (Docs of all the
command line options) !

Regards
	René

>
> --
>
> /====================================================================/|
> | Stephane GEORGES                     |                             ||
> | DALiM SOFTWARE GmbH      R&D         |    Tel: +49 7851 9196 40    ||
> | Strassburger Str.6                   |    Fax: +49 7851 7357 6     ||
> | D-77696                              |                             ||
> | Kehl-Sundheim (Germany)              |    E-mail: sg@dalim.de      ||
> |____________________________________________________________________|/

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Re: is gcc optimized for g4 processors ?

[David Edelsohn]

>>>>> Stephane GEORGES writes:

Stephane> I'm doing performance tests on my G4 - 400 AGP.
Stephane> I would like to know if gcc (egcs-2.91.66) can be optimized for G4 processor.

Stephane> Does -mcpu=7400 exists ?

	Currently there are no scheduling definitions for MPC7400
integrated into GCC.

David

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