From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <3F72B028.80404@bluewin.ch>
Date: Thu, 25 Sep 2003 11:06:48 +0200
From: Wolfgang Grandegger <wolfgang.grandegger@bluewin.ch>
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To: Christophe.LINDHEIMER@fr.thalesgroup.com
Cc: linuxppc-embedded@lists.linuxppc.org
Subject: Re: Kernel Driver with floats.
References: <66CE949D18BCB249ABE8D9AF48C4F1CE7776D5@helios.gnv.tcc.thomson-csf.com>
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On 09/25/2003 10:45 AM Christophe.LINDHEIMER@fr.thalesgroup.com wrote:
> Hi.
>
> I would like to know if it is possible to use floats in a kernel driver.
> I use a MPC860.
> I get unresolved symbols with the standard makefile.
> Are there special options to use ?
> Any lib to add ?

We have a demo module for RTAI using soft-floats on MPC 8xx at
ftp://ftp.denx.de/pub/RTAI/contrib/fp_ppc_8xx.tar.bz2. There is a README
inside. But be aware that soft-float on the 860 is very slow, especially
when you do complex FP math like sin() etc.

Wolfgang.


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