[Xenomai-core] USING FLOATING POINT KERNEL SIDE

[Xenomai-core] USING FLOATING POINT KERNEL SIDE

[axel axel]

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Hi,

i want to use floating point in module with some xenomai task.
I understand that i can use floating point if i implement some functions (
xnarch_fpu_init...... ).

Ok for this but if i try to compile the module, the compiler ( gcc 3.4.3 for
arm ) says me there are unresolved symbol like __mulsf3.

Have you ever try a xenomai task that use floating point in kernel space ?


Thanks a lot for your help.


Roberto Bielli

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Re: [Xenomai-core] USING FLOATING POINT KERNEL SIDE

[Wolfgang Grandegger]

axel axel wrote:
> Hi,
> 
> i want to use floating point in module with some xenomai task.
> I understand that i can use floating point if i implement some functions
> ( xnarch_fpu_init...... ).
> 
> Ok for this but if i try to compile the module, the compiler ( gcc 3.4.3
> for arm ) says me there are unresolved symbol like __mulsf3.
> 
> Have you ever try a xenomai task that use floating point in kernel space ?

Does your ARM processor have a FPU? If not, you need a FP emulation
library to link with.

Wolfgang.

Re: [Xenomai-core] USING FLOATING POINT KERNEL SIDE

[Gilles Chanteperdrix]

On Tue, Mar 4, 2008 at 1:49 PM, axel axel <softaxel@domain.hid> wrote:
> Hi,
>
> i want to use floating point in module with some xenomai task.
> I understand that i can use floating point if i implement some functions (
> xnarch_fpu_init...... ).
>
> Ok for this but if i try to compile the module, the compiler ( gcc 3.4.3 for
> arm ) says me there are unresolved symbol like __mulsf3.

Compile your module with V=1 and you will understand what happens.

-- 
                                               Gilles Chanteperdrix