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Date: Tue, 23 Feb 2010 10:17:39 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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Subject: Re: [PATCH] x86: Add optimized popcnt variants
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To: Borislav Petkov <bp@amd64.org>
Cc: Michal Marek <mmarek@suse.cz>, linux-kbuild <linux-kbuild@vger.kernel.org>, Peter Zijlstra <peterz@infradead.org>, Andrew Morton <akpm@linux-foundation.org>, Wu Fengguang <fengguang.wu@intel.com>, LKML <linux-kernel@vger.kernel.org>, Jamie Lokier <jamie@shareable.org>, Roland Dreier <rdreier@cisco.com>, Al Viro <viro@ZenIV.linux.org.uk>, "linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>, Brian Gerst <brgerst@gmail.com>

On 02/23/2010 09:54 AM, Borislav Petkov wrote:
> 
> Right, doh. Ok, just added it and it builds fine with a gcc (Gentoo
> 4.4.1 p1.0) 4.4.1. If you have suspicion that some older gcc versions
> might choke on it, I could leave the "=D" dummy constraint in?
> 

I can try it with gcc 3.4 here.  -fcall-saved-rdi is cleaner, if it works.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.