linux-kernel - Re: [RFC PATCH] crypto: crc32c-pclmul

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Message-Id: <5386E55F02000078000B524F@mail.emea.novell.com>
Date:	Thu, 29 May 2014 07:44:31 +0100
From:	"Jan Beulich" <jbeulich@...e.com>
To:	<linux@...izon.com>, <tim.c.chen@...ux.intel.com>
Cc:	<linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] crypto: crc32c-pclmul - Use pmovzxdq to shrink
 K_table

>>> "George Spelvin" <linux@...izon.com> 05/28/14 11:47 PM >>>
>Jan Beulich <jbeulich@...e.com> wrote:
>> "George Spelvin" <linux@...izon.com> 05/28/14 4:40 PM
>>> Jan: Is support for SLE10's pre-2.18 binutils still required?
>>> Your PEXTRD fix was only a year ago, so I expect, but I wanted to ask.
>
>> I'd much appreciate if I would be able to build the kernel that way for
>> another while.
>
>Does it matter that the code I'm working on is 64-bit only?

No.

>It aready
>uses crc32q instruction (added with SSE4.2) with no assembler workarounds,
>so I figure pmovzxdq (part of SSE 4.1) doesn't make it any worse.

If that's the case, then adding another (earlier) one shouldn't be an issue.

Jan

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