From: Artur Skawina <art.08.09@gmail.com>
Date: Sat, 08 Aug 2009 18:12:36 GMT
Subject: Re: [PATCH 0/7] block-sha1: improved SHA1 hashing
Message-ID: <4A7DC014.1030904@gmail.com>
In-Reply-To: <alpine.LFD.2.01.0908081004560.3288@localhost.localdomain>

Linus Torvalds wrote:
> 
> On Sat, 8 Aug 2009, Artur Skawina wrote:
>> I've inlined the byteswapping in 'opensslb', maybe that one will
>> do a bit better.
> Hmm. Testing on my atom, the inlined bswap is worse, but the asm versions 
> are generally superior to any C one:

It loses on atom, but is the best one on both P3 and P4 here.
Based on your other numbers I was expecting it to win on 32-bit
nehalem too. gcc doing a better job of scheduling w/ 'linusv'
wouldn't surprise though (since there are no spills, the data reads
are about the only other thing that could make a difference. And, yes,
they show up in the profiles; if x86 only had one more register...)

artur