How does nRF51422 handle sqrt(n) from C?

[JFreyWahoo]

I am trying to better understand how the nRF51422 handles sqrt(n) coming from C in Keil?

Can anyone explain, or link to resources which do? I am having difficulty finding such an explanation.

Thanks, J

Edit - I mean to ask, is it implemented in hardware or software, and how I could go about making it the most efficient implementation possible.

[Susheel Nuguru]

There is no special hardware to perform the sqrt function in nRF51. It is done in the normal way that ARM cortex-M0 processor would do (as this is the processor inside nRF51). I think in Keil sqrt function is included in the MicroLib that needs to be included into your project.

[JFreyWahoo]

Ok thanks for the response. So, most likely however sqrt(n) is run from #include math.h is already the most efficient way?

[Michael Dietz]

It depends what you want. Check this post out: www.codeproject.com/.../Best-Square-Root-Method-Algorithm-Function-Precisi I definitely wouldn't assume that the Keil sqrt function included in the MicroLib is the most efficient though depending on the trade-offs you want.