Messages in this thread | | | Date | Fri, 17 Aug 2007 18:54:52 -0700 | From | Stephen Hemminger <> | Subject | Re: [PATCH] i386: optimize memset of 6 and 8 bytes |
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On Fri, 17 Aug 2007 18:49:34 -0700 Arjan van de Ven <arjan@infradead.org> wrote:
> > On Fri, 2007-08-17 at 16:50 -0700, Stephen Hemminger wrote: > > Tne network code does memset for 6 and 8 byte values, that can easily > > be optimized into simple assignments without string instructions. > > > so... question. > Why are we doing this by hand? Wouldn't gcc just generate this code in > the first place (when using __builtin_memset)? I very much suspect it > would (and if some version doesn't.... we really ought to get that > fixed)
i386 and x86_64 are not using __builtin_memset, as least from the code that I see generated.
-- Stephen Hemminger <shemminger@linux-foundation.org> - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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