library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;

package gen_pkg is
	type alu_ops is (NOP, SUB, ADD, MUL, DIV, DONE);
	constant CBITS : integer := 32;
	subtype csigned is signed((CBITS-1) downto 0);
	--TODO: bei CBITS-1 gibts einen overflow :/
	subtype cinteger is integer range -(2**(CBITS-2)) to ((2**(CBITS-2))-1);
	function find_msb(a : csigned) return natural;
end package gen_pkg;

package body gen_pkg is
	function find_msb(a : csigned) return natural is
		variable r : natural := 0;
		variable count : boolean := true;
	begin
		for i in (CBITS-1) downto 0 loop
			if count then
				if a(i) = '1' then
					count := false;
				else
					r := r+1;
				end if;
			else
				null;
			end if;
		end loop;
		return (CBITS - r);
	end function find_msb;
end package body gen_pkg;