code for finding logarithm

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ammassk

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dear all
Can anybody give me VHDL code for logarithm. I need to do logarithm base e for real numbers which I represented in fixed point format.(16 bit, 8 bit for fractional part).
 

You could use some cordic IP. Or do your own lookup table with some interpolation if you feel like it.

Short answer: CORDIC.
 

Can you please explain how cordic gives log values. CORDIC ip gives sin,cos,atan,arctanh etc. From these How will I get log(2.3134)? I got the relation 2* arctanh(x)=log(1+x/1-x). also how can i make LUT? Is it finding log values manually and store that values in memory?
 
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