linux-kernel - Re: [PATCH 24/56] microblaze

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Message-Id: <1210033811.5798.188.camel@localhost>
Date:	Tue, 06 May 2008 10:30:11 +1000
From:	John Williams <john.williams@...alogix.com>
To:	monstr@...nam.cz
Cc:	linux-kernel@...r.kernel.org, arnd@...db.de,
	linux-arch@...r.kernel.org, stephen.neuendorffer@...inx.com,
	John.Linn@...inx.com, matthew@....cx, will.newton@...il.com,
	drepper@...hat.com, microblaze-uclinux@...e.uq.edu.au,
	grant.likely@...retlab.ca, Michal Simek <monstr@...str.eu>
Subject: Re: [PATCH 24/56] microblaze_v2: time support

Hi Michal,

On Mon, 2008-05-05 at 16:22 +0200, Michal Simek wrote:
> Hi John,
> 
> you wrote me you have smarter implementation that xilinx did. Can you find it
> and send me it?

It's not much (any?) better?  One less multiply I think?  Attached
anyway - feel free to discard for now.

We could do a nice asm implementation with the optional mulhi
instruction, but that can wait.

Cheers,

John


View attachment "delay-improvement.patch" of type "text/x-patch" (2906 bytes)