Re: Specific support for Intel Atom architecture

[Måns Rullgård]

"H. Peter Anvin" <hpa@xxxxxxxxx> writes:

> Willy Tarreau wrote:
>>>>>
>>>>> $(call cc-option,-march=atom,-march=i686)
>>>> if it's an in-order architecture, wouldn't it be better to tune for
>>>> i386 or i486 instead ?
>>> -march isn't about tuning, it's about supported instructions.
>> 
>> agreed, but unless specified otherwise using -mtune, -march also sets
>> default tuning for the indicated CPU. At least in my experience.
>> 
>>> The right line is
>>> $(call cc-option,-march=atom,-march=core2)
>
> For really old gcc's (we support all the way back to gcc 3.2 still)
> -march=core2 might not work either.

-march=core2 support was added in gcc 4.3.

-- 
Måns Rullgård
mans@xxxxxxxxx

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