From: Avi Kivity <avi@argo.co.il>
To: Jiri Slaby <jirislaby@gmail.com>
Cc: Arjan van de Ven <arjan@infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: FP in kernelspace
Date: Sun, 30 Jul 2006 18:23:50 +0300 [thread overview]
Message-ID: <44CCCF06.4070406@argo.co.il> (raw)
In-Reply-To: <44CCCB74.9010605@gmail.com>
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
next prev parent reply other threads:[~2006-07-30 15:23 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-30 11:28 FP in kernelspace Jiri Slaby
2006-07-30 11:31 ` Jiri Slaby
2006-07-30 14:32 ` Arjan van de Ven
2006-07-30 14:40 ` Avi Kivity
2006-07-30 14:54 ` Arjan van de Ven
2006-07-30 15:09 ` Jiri Slaby
2006-07-30 15:20 ` Arjan van de Ven
2006-07-30 15:23 ` Avi Kivity [this message]
2006-07-30 15:21 ` Avi Kivity
2006-07-30 17:34 ` Andi Kleen
2006-07-30 18:11 ` Avi Kivity
2006-07-30 18:15 ` Andi Kleen
2006-07-30 18:30 ` Avi Kivity
2006-07-30 18:17 ` Jan Engelhardt
2006-07-30 17:33 ` Andi Kleen
2006-07-30 18:18 ` Jan Engelhardt
2006-07-30 18:28 ` Avi Kivity
2006-07-30 23:11 ` Jan Engelhardt
2006-07-30 17:32 ` Andi Kleen
2006-07-31 0:33 ` Steven Rostedt
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