Philip N Daly wrote:
>
> Is there a kernel (build) flag that handles the FPU?
>
> As we all know there are FP examples in RTAI and RTLinux. I have used the
> RTAI code and ported it to RTLinux and I see the same effect under RTAI
> 1.1, 1.3 and RTLinux 2.2 ... it appears that my FPU does not work.
>
> In this, I am assuming that the numbers reported from the fp/rt_process
> task should be the same (except for the reality check number on the RHS).
> They are not no matter how many times I toggle the 'f' key.
>
> The only thing I can think of right now is either my FPU is broken or
> the kernel was compiled in some way with a dodgy flag (I think MATH_EMULATION
> was enabled). Anyone else seen this? And is there a way I can test the FPU
> independently?
Hi Phil,
I just re-ran examples/fp on my machine (RTAI-1.3) and it worked as
expected. I the kernel I'm using the CONFIG_MATH_EMULATION is not set.
I would not expect it being on to cause you problems ??
Regards, Stuart
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