linux-kernel - Re: Why ssse3?

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Message-ID: <463948D8.4000303@zytor.com>
Date:	Wed, 02 May 2007 19:28:40 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Ulrich Drepper <drepper@...hat.com>
CC:	Andi Kleen <ak@...e.de>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: Why ssse3?

Ulrich Drepper wrote:
> 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.

Intel has a nasty habit of renaming things after they are already
deployed in Linux.

	-hpa
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