2 use ieee.std_logic_1164.all;
3 use ieee.numeric_std.all;
9 architecture sim of beh_alu_tb is
13 sys_clk : in std_logic;
14 sys_res_n : in std_logic;
19 do_calc : in std_logic;
20 calc_done : out std_logic
24 signal sys_clk, sys_res_n, do_calc, calc_done : std_logic;
25 signal opcode : alu_ops;
26 signal op1, op2, op3 : csigned;
27 signal stop : boolean := false;
33 sys_res_n => sys_res_n,
35 calc_done => calc_done,
54 type alu_testv is record
61 -- ggf. groesse des arrays erhoehen
62 type alu_testv_array is array (natural range 0 to 5) of alu_testv;
64 variable testmatrix : alu_testv_array :=
65 ( 0 => (7, ALU_MUL, 3, 21),
66 1 => (-7, ALU_MUL, 3, -21),
67 2 => (268435456, ALU_MUL, -2, -536870912),
68 3 => (268435456, ALU_MUL, 2**5, 0), -- um fuenf nach links shiften
69 4 => (268435456 + 5, ALU_MUL, 2**5, 160), -- = 5 * (2^5)
70 others => (0, ALU_MUL, 0, 0)
78 op1 <= (others => '0');
79 op2 <= (others => '0');
84 for i in testmatrix'range loop
86 op1 <= to_signed(testmatrix(i).o1,CBITS);
87 opcode <= testmatrix(i).o;
88 op2 <= to_signed(testmatrix(i).o2,CBITS);
90 -- berechnung kann los gehen
93 -- warten auf die alu einheit
97 assert op3 = to_signed(testmatrix(i).expected,CBITS)
98 report "" & cinteger'image(testmatrix(i).o1) &
99 " " & integer'image(to_integer(signed(opcode))) &
100 " " & cinteger'image(testmatrix(i).o2) &
101 "/= " & integer'image(to_integer(op3)) &
102 " -- erwartet: " & cinteger'image(testmatrix(i).expected);
110 report "alle testfaelle der ALU waren erfolgreich!";
114 end architecture sim;