Hi
all
i have come across one application which was written as
Rtlinux module.
which is having floating point operations.
As Linux kernel is not desinged for effective floating point
support,
whether it is acceptable to have more floating calculations
in kernel space.
advance thanks
chandu
-----Original Message-----
From: Mario Taschwer [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, April 10, 2002 1:48 AM
To: [EMAIL PROTECTED]
Subject: Re: [rtl] RTFIFO and floats
A FIFO-handler (registered via rtf_create_handler()) is executed in Linux
kernel context, which does not support floating-point operations.
Try to let the FIFO-handler just wake up an FP RT thread that actually
calls rtf_get() on the float type.
Mario Taschwer
On Tue, Apr 09, 2002 at 08:32:27PM +0200, Michael Nielsen wrote:
>
> > Make sure you used rtl_pthread_attr_setfp when you created the thread.
> > Victor Yodaiken
>
> Must the FIFO-handler be a thread ?
>
> I have made it just like you make an ordinary interrupt service routine
(normal kernel function). Is that wrong ?
>
> By the way when i print the same float as hexadecimal number (option %x)
in both the user-space program and in the kernel-space, they are different,
but if i cast it to unsigned int then they seem to be identical.
> Can you give a good explanation for that ?
>
> Thanks in advance
>
> Michael
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Chandu Reddy K - CTD, Chennai..vcf
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