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Message-ID: <yw1x4ow2ugcz.fsf@ps3.mansr.com> Date: Sun, 03 May 2009 20:38:20 +0100 From: Måns Rullgård <mans@...sr.com> To: linux-kernel@...r.kernel.org Subject: Re: Specific support for Intel Atom architecture "H. Peter Anvin" <hpa@...or.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@...sr.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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