* Kernel Driver with floats.
@ 2003-09-25 8:45 Christophe.LINDHEIMER
2003-09-25 9:06 ` Wolfgang Grandegger
0 siblings, 1 reply; 3+ messages in thread
From: Christophe.LINDHEIMER @ 2003-09-25 8:45 UTC (permalink / raw)
To: linuxppc-embedded
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 ?
Thanks
Chris
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Kernel Driver with floats.
2003-09-25 8:45 Kernel Driver with floats Christophe.LINDHEIMER
@ 2003-09-25 9:06 ` Wolfgang Grandegger
0 siblings, 0 replies; 3+ messages in thread
From: Wolfgang Grandegger @ 2003-09-25 9:06 UTC (permalink / raw)
To: Christophe.LINDHEIMER; +Cc: linuxppc-embedded
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.
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
^ permalink raw reply [flat|nested] 3+ messages in thread
* RE: Kernel Driver with floats.
@ 2003-09-25 13:23 Christophe.LINDHEIMER
0 siblings, 0 replies; 3+ messages in thread
From: Christophe.LINDHEIMER @ 2003-09-25 13:23 UTC (permalink / raw)
To: wolfgang.grandegger, Christophe.LINDHEIMER; +Cc: linuxppc-embedded
Ok
Thank you, it seems it compiles much better now !
Regards
Chris
> -----Message d'origine-----
> De : Wolfgang Grandegger [mailto:wolfgang.grandegger@bluewin.ch]
> Envoye : jeudi 25 septembre 2003 11:07
> A : Christophe.LINDHEIMER@fr.thalesgroup.com
> Cc : linuxppc-embedded@lists.linuxppc.org
> Objet : Re: Kernel Driver with floats.
>
>
> 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.
>
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
^ permalink raw reply [flat|nested] 3+ messages in thread
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2003-09-25 8:45 Kernel Driver with floats Christophe.LINDHEIMER
2003-09-25 9:06 ` Wolfgang Grandegger
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