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## how to do log2(n) in verilog? – comp.lang.verilog.narkive.com

https://comp.lang.verilog.narkive.com/Bi0sxBwV/how-to-do-log2-n-in-verilog

In Verilog-2001, you can write your own functions that can be used in constant expressions, as long as they abide by the restrictions imposed for such "constant functions." Then you have to write the function correctly. This is clearly non-trivial, since the version originally published as an example in the Verilog-2001 standard was wrong.

## Solved: How to implement log10 (x) in verilog in Vivado …

https://forums.xilinx.com/t5/Other-FPGA-Architectures/How-to-implement-log10-x-in-verilog-in-Vivado/td-p/703195

In my case, I built a Log2() function covering an input range of 1 to 2 with a prescaling loop to find the integer portion of the answer. Then I used the change of base formula to convert any logarithm to Log2(). example: 10*log10(x) = 10/log2(10)*log2(x).

## how to use LOG2 function in verilog 2001 – Google Groups

https://groups.google.com/d/topic/comp.lang.verilog/3eVwKLoh1lg

you found this in an example (including some in the Verilog LRM) it is likely that it implies the existence of a function within the scope of the current module that implements a log base 2.

## Constant Functions in Verilog 2001 Beyond Circuits

https://www.beyond-circuits.com/wordpress/2008/11/constant-functions/

Constant functions are a great feature introduced in Verilog 2001. In a nutshell, constant functions allow you to write functions that are used at elaboration time. That is when parameters are evaluated and generate statements are expanded. One great example of a constant function is the log2 function.

## [SOLVED] how to calculate log2(n) in verilog – edaboard.com

https://www.edaboard.com/showthread.php?177879-how-to-calculate-log2(n)-in-verilog

Nov 01, 2010 · Hiii can someone please help me to calculate log base 2 in Verilog. What i need to do is to simply calculate the log base to of a variable n. Please help

## AR# 44586: 13.2 Verilog $clog2 function … – Xilinx

https://www.xilinx.com/support/answers/44586.html

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