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logarithm implementation

Altera_Forum
Honored Contributor II
‎09-30-2011 04:37 PM
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sir, 

 

plz suggest me the method how can i implement logarithm(bbase 2) in vhdl??:( 

 

thnaks in advance.:)
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Altera_Forum
Honored Contributor II
‎09-30-2011 06:06 PM
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Depending on your accuracy requirements, you could shift the input until it's between 0 and 1. Count the number of shifts to get the integer portion of the result. Then use a table lookup to find the fractional portion of the result. 

 

Your accuracy will depend on the size of the table.
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