Re: Regarding floating point,exponential and power calcualtion in kernel.

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On Sat, Mar 17, 2001 at 11:43:15PM +0530, Chandrashekhar S wrote:
> Hi,
> 
> My name is chandra. I have a problem in calculation of exponential and
> power functions inside the kernel, because #include<math.h> is not
> supported in kernel space, so I cannot use the standard built in library
> functions pow() and exp(). So can you people help in how to overcome this
> problem. Please send a source code to calculate exponential and power, so
> that I can use it in kernel land.
> 
> Also what about floating point calculations, How to overcome this in
> kernel???

	Sigh...  This is supposed to be a FAQ ...

	"Thou shalt NOT use floating point in the kernel!"

	Generally speaking, doing your math in floating-point is
	for cases where you really need it, and fixed point, or
	integer approximations are not good enough.

> Also qsort is not supported in kernel, Is there any method to sort
> integers in kernel???

	Kernel is not userspace with standard libc available to it.

	Now, what exactly are you aiming at ?

> Regards,
> Chandra

/Matti Aarnio
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