linux-kernel - Re: FP in kernelspace

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Message-ID: <44CCCF06.4070406@argo.co.il>
Date:	Sun, 30 Jul 2006 18:23:50 +0300
From:	Avi Kivity <avi@...o.co.il>
To:	Jiri Slaby <jirislaby@...il.com>
CC:	Arjan van de Ven <arjan@...radead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: FP in kernelspace

Jiri Slaby wrote:
>
> > unfortunately this only works for MMX not for real fpu (due to 
> exception
> > handling uglies)
>
> concludes it's not multiplatform at all... For that reasen I (maybe) 
> want some
> "protocol" for communication with US, where I can easily compute it.
>
Well, usually such a protocol is by means of read(2) and write(2) to a 
character device provided by your driver: userspace reads some data, 
does the fp ops, and writes it back.  If you want realtime you'll have 
to use a realtime thread with the appropriate priority.

-- 
error compiling committee.c: too many arguments to function

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