CCS/TMS320F28377D: Implementing "tanh" or " Sigmoid" functoin

tanh() is part of math.h

Thank you for your prompt responce. Since I dont know what is happening there? How can I find out howmany clock cycle does it need to compile "tanh" from math.h ? 

Why do you care how long it takes to compile?

Did you try to set a digital output before the "tanh" instruction and reset it after?

Using a simple oscilloscope you can see how many time the "tanh" function take and compare with a lookup table method.

The 38377 device has a Floating Point Unit and also a Trigonometric Math Unit so is not ever true that the lookup table is the best way, expecially if you need precision on the result.

Regards.

Dear MiaooaiM,

Thank you for the idea of using oscilloscope. sounds interesting! However, I would rather to do it in simulation not with osciloscopes. ( like profiling a code in MATLAB) 

Besides, as far as I know the Trigonometric Math Unit has only four functions in it. 

__sin() , __cos(), _atan(), __sqrt()

and products and devides. 

What I need here is a tanh() function which is basically an exponential function.

but I will try your method and will share my results with you.

My bad ... :( 

I am new in all these and not expert with all the expression. Sorry if I misled you. :(

I have also found the following link to find the cycle in CCS,

https://www.youtube.com/watch?v=SFgMggLv8Ck