thanks victor,that may help so much
thanks again Sam,
> Subject: Re: arithmetic in Nesc ??
> From: [email protected]
> To: [email protected]
> CC: [email protected]
> Date: Wed, 16 Jun 2010 19:05:50 +0100
>
> Sam,
>
> You might be better off implementing your own mathematical functions, if
> they are not too complex.
>
> I think math.h implementations account for float variables, so they need
> to use fixed-point arithmetics. If you don't need floats you can save a
> lot of time with simpler implementations. In one application I saved
> 15ms for pow.
>
> Take a look at this:
> http://mspgcc.cvs.sourceforge.net/viewvc/mspgcc/msp430-libc/src/libm/ef_pow.c?view=markup
>
>
> Regards,
> Victor
>
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