Re: [Xenomai-help] Floating Point Exceptions in RT-Tasks

[Philippe Gerum <rpm@xenomai.org>]

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roderik.wildenburg@domain.hid wrote:
>> Gilles sent you a patch affecting 
>> include/asm-powerpc/bits/pod.h a few weeks
>> ago, that fixed an FPU issue. Are you running with this patch applied?
>>
> 
> Yes, with 2.3.5 and 2.4.6. Both show the same behavior.
> Obviously, in the meantime, Wolfgang could reproduce the problem!?
>

Unfortunately, I'm not able to reproduce this bug on my side, even using the 
latest linuxppc_devel tree. I have attached my test code to make sure we are 
testing the same thing. This test code does raise the FPU exception properly.

> Roderik
> 
> --------------------------------------------------------
> manroland AG
> Vorsitzender des Aufsichtsrates: Hanno C. Fiedler
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> USt-Ident-Nr. DE 250200933
> 


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#include <sys/types.h>
#include <sys/mman.h>
#include <stdio.h>
#include <fenv.h>
#include <native/task.h>

double z;

int main (int argc, char **argv)
{
	double a = 23.0;

	z = 0;
	fesetenv(FE_ENABLED_ENV);

        mlockall(MCL_CURRENT | MCL_FUTURE);

	rt_task_shadow(NULL, "main", 10, 0);
	a /= z;
	rt_task_suspend(NULL);

	return (int)a;
}