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Altera_Forum
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14 years ago

logarithm implementation

sir, plz suggest me the method how can i implement logarithm(bbase 2) in vhdl??:( thnaks in advance.:)
Altera_Forum's avatar
Altera_Forum
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14 years ago

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.