29 lines
970 B
VHDL
29 lines
970 B
VHDL
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-- Project: YASG (Yet another signal generator)
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-- Project Page: https://github.com/id101010/vhdl-yasg/
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-- Authors: Aaron Schmocker & Timo Lang
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-- License: GPL v3
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-- Create Date: 12:59:01 05/16/2016
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----------------------------------------------------------------------------------
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library IEEE;
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use IEEE.STD_LOGIC_1164.ALL;
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use IEEE.NUMERIC_STD.ALL;
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package helpers is
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--helper function to calculate the log2 (truncated) of a integer
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function log2_int(n:natural) return natural;
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end helpers;
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package body helpers is
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function log2_int(n:natural) return natural is
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begin
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if(n>1) then --we can stil divide n by 2
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return 1+log2_int(n/2); --recursivly call log2_int for the by two divided number.
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end if;
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return 1; --since we can no longer divide n, return 1
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end log2_int;
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end helpers;
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