linux-kernel - Re: Why ssse3?

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Message-ID: <4639171A.3050004@redhat.com>
Date:	Wed, 02 May 2007 15:56:26 -0700
From:	Ulrich Drepper <drepper@...hat.com>
To:	Andi Kleen <ak@...e.de>
CC:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: Why ssse3?

Andi Kleen wrote:
> Nope. SSE3 != SSSE3. The additional S means Supplemential.
> 
> It's probably because the few changes didn't justify a SSE4

OK, the problem is that the actual sse3 bit is misnamed.  According to
Intel's docs bit 0 of ECX is "sse", the kernel uses "pni".  Too bad.

-- 
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖


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