* Core 2 Duo
@ 2006-09-13 20:51 Martin Alm
2006-09-13 23:54 ` Tim Prince
0 siblings, 1 reply; 4+ messages in thread
From: Martin Alm @ 2006-09-13 20:51 UTC (permalink / raw)
To: gcc-help
Hi
I'm picking up my new laptop on friday, and it's a Core 2 Duo "Merom"
(T5600). As I understand -march=merom is comming in 4.3. But we are
not there yet, I'm going to use 4.1 and I want to know what flags are
recommended?
Thanks for help
/Martin
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Core 2 Duo
2006-09-13 20:51 Core 2 Duo Martin Alm
@ 2006-09-13 23:54 ` Tim Prince
2006-09-14 7:16 ` Grigory Zagorodnev
0 siblings, 1 reply; 4+ messages in thread
From: Tim Prince @ 2006-09-13 23:54 UTC (permalink / raw)
To: Martin Alm; +Cc: gcc-help
Martin Alm wrote:
> Hi
>
> I'm picking up my new laptop on friday, and it's a Core 2 Duo "Merom"
> (T5600). As I understand -march=merom is comming in 4.3. But we are
> not there yet, I'm going to use 4.1 and I want to know what flags are
> recommended?
>
-march=nocona which 4.2 would select for you, is probably as good as you
can do.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Core 2 Duo
2006-09-13 23:54 ` Tim Prince
@ 2006-09-14 7:16 ` Grigory Zagorodnev
2006-09-17 1:50 ` Ryan Hill
0 siblings, 1 reply; 4+ messages in thread
From: Grigory Zagorodnev @ 2006-09-14 7:16 UTC (permalink / raw)
To: tprince; +Cc: Martin Alm, gcc-help
Tim Prince wrote:
> Martin Alm wrote:
>> (T5600). As I understand -march=merom is comming in 4.3. But we are
>> not there yet, I'm going to use 4.1 and I want to know what flags are
>> recommended?
>>
> -march=nocona which 4.2 would select for you, is probably as good as you
> can do.
>
For 4.2 the better choice is -mtune=generic, which is actually default.
Same you can get with 4.1 compiler in RH FC5.
For regular 4.1 you can try either -mtune=nocona or -mtune=ppro.
- Grigory
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Core 2 Duo
2006-09-14 7:16 ` Grigory Zagorodnev
@ 2006-09-17 1:50 ` Ryan Hill
0 siblings, 0 replies; 4+ messages in thread
From: Ryan Hill @ 2006-09-17 1:50 UTC (permalink / raw)
To: gcc-help
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Grigory Zagorodnev wrote:
> Tim Prince wrote:
>> Martin Alm wrote:
>>> (T5600). As I understand -march=merom is comming in 4.3. But we are
>>> not there yet, I'm going to use 4.1 and I want to know what flags are
>>> recommended?
>>>
>> -march=nocona which 4.2 would select for you, is probably as good as
>> you can do.
>>
> For 4.2 the better choice is -mtune=generic, which is actually default.
> Same you can get with 4.1 compiler in RH FC5.
>
> For regular 4.1 you can try either -mtune=nocona or -mtune=ppro.
We've been debating this recently and I'd like to see what others think.
With 4.1, would it be better to use -m(arch|tune)=prescott or
-march=pentium-m for Core Duo (Yonah) in a 32bit userland? Core Duo 2
(Merom)? Would -march=pentium-m -msse3 be a better choice?
In a 64bit world, how does -march=nocona compare to something like
-march=pentium-m -msse3 -m64 (which i think is a little sketchy)?
Thanks,
--de.
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^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2006-09-17 1:50 UTC | newest]
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2006-09-13 20:51 Core 2 Duo Martin Alm
2006-09-13 23:54 ` Tim Prince
2006-09-14 7:16 ` Grigory Zagorodnev
2006-09-17 1:50 ` Ryan Hill
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