Messages in this thread | | | From | Måns Rullgård <> | Subject | Re: Specific support for Intel Atom architecture | Date | Sun, 03 May 2009 20:38:20 +0100 |
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"H. Peter Anvin" <hpa@zytor.com> 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@mansr.com
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