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Date: Tue, 26 Jun 2012 06:10:24 +0400
From: Solar Designer <>
Subject: Re: precompiled sse-intrinsics vs. -march=native

On Tue, Jun 26, 2012 at 03:58:19AM +0200, magnum wrote:
> On 2012-06-26 03:41, Solar Designer wrote:
> >It appears that we shouldn't use the precompiled sse-intrinsics
> >files (icc's *.S) in -march=native builds.  Specifically, when I
> >tried linux-x86-64-gpu on bull where -march=native implies XOP, I
> >got reporting that XOP intrinsics were being used, whereas in reality
> >the build used icc-precompiled SSE2 code.
> My bad, I though I removed -DUSING_ICC_S_FILE from them. Good thing you 
> caught it.

Ouch, I did not even consider -DUSING_ICC_S_FILE.  Now I see that the
-x86-64-gpu, etc. targets did not have it, but the -x86-gpu, etc. ones
did.  Since we're now removing the uses of precompiled sse-intrinsics
from those targets, we should also remove -DUSING_ICC_S_FILE from them.
This is not done in the patch that I sent - please do it manually.



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