Hi Jaya,
On Tue, Nov 21, 2000 at 03:36:05PM +0530, Jaya wrote:
>
> Can one use floating point operations in the Linux Kernel ??
AFAIK you cannot use floating point operations in the Linux Kernel.
But you *can* use them in your RT threads.
>
> Where can I get some info. on this ?
man pthread_setfp_np
and there is a piece from a an important mail by Victor:
************************************************
POSIX requires that a newly created thread start running at once, so
creat
set_fp
is not good since the thread may have already executed fp operations.
As Pavel says, the correct method is
thread_code{
set_fp /*before we do any fp ops */
...
}
and then in the init code
creat_thread
The alternative method, which is more POSIX-ly correct is to use
pthread_attr_setfp
during the thread creation -- before the create call.
But since I just noticed that this call is not in the man pages yet, I'm
not surprised that nobody saw it. sorry.
*************************************************
The topic is sometimes discussed in this list, see archives or ask.
Regards,
pa
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Pavel Andris | tel: +421 7 5941 2167
Institute of Control Theory and Robotics | fax: +421 7 5477 6045
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Slovakia |
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