2 use ieee.std_logic_1164.all;
3 use ieee.numeric_std.all;
6 subtype alu_ops is std_logic_vector(2 downto 0);
7 constant ALU_NOP : alu_ops := "000";
8 constant ALU_SUB : alu_ops := "001";
9 constant ALU_ADD : alu_ops := "010";
10 constant ALU_MUL : alu_ops := "011";
11 constant ALU_DIV : alu_ops := "100";
12 constant ALU_DONE : alu_ops := "101";
14 constant CBITS : integer := 32;
15 subtype csigned is signed((CBITS-1) downto 0);
16 --TODO: bei CBITS-1 gibts einen overflow :/
17 subtype cinteger is integer range -(2**(CBITS-2)) to ((2**(CBITS-2))-1);
18 function find_msb(a : csigned) return natural;
21 package body gen_pkg is
22 function find_msb(a : csigned) return natural is
23 variable r : natural := 0;
25 for i in (CBITS-1) downto 0 loop
30 end function find_msb;
31 end package body gen_pkg;