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tb_dec.vhd
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library ieee;
use ieee.std_logic_1164.all;
entity TB_DEC is
end TB_DEC;
architecture HEHE of TB_DEC is
component dec
PORT(
OP : in STD_LOGIC_VECTOR(7 downto 0);
OADD : out STD_LOGIC;
OAND : out STD_LOGIC;
OOR : out STD_LOGIC;
ONOT : out STD_LOGIC;
OY : out STD_LOGIC;
OHLT : out STD_LOGIC;
ONOP : out STD_LOGIC);
end component;
signal CLK, OADD, OAND, OOR, ONOT, OY, OHLT, ONOP : STD_LOGIC := '0';
signal OP : STD_LOGIC_VECTOR(7 downto 0) := (others => '0');
begin
uut: dec PORT MAP (OP => OP, OADD => OADD, OAND => OAND, OOR=> OOR, ONOT => ONOT, OY => OY, OHLT => OHLT, ONOP => ONOP);
stim_proc: process
begin
OP <= "00000000";
wait for 10 ns;
assert OADD = '0' report "should return correct op" severity warning;
assert OAND = '0' report "should return correct op" severity warning;
assert OOR = '0' report "should return correct op" severity warning;
assert ONOT = '0' report "should return correct op" severity warning;
assert OY = '0' report "should return correct op" severity warning;
assert OHLT = '0' report "should return correct op" severity warning;
assert ONOP = '1' report "should return correct op" severity warning;
OP <= "00000001";
wait for 10 ns;
assert OADD = '1' report "should return correct op" severity warning;
assert OAND = '0' report "should return correct op" severity warning;
assert OOR = '0' report "should return correct op" severity warning;
assert ONOT = '0' report "should return correct op" severity warning;
assert OY = '0' report "should return correct op" severity warning;
assert OHLT = '0' report "should return correct op" severity warning;
assert ONOP = '0' report "should return correct op" severity warning;
OP <= "00000010";
wait for 10 ns;
assert OADD = '0' report "should return correct op" severity warning;
assert OAND = '1' report "should return correct op" severity warning;
assert OOR = '0' report "should return correct op" severity warning;
assert ONOT = '0' report "should return correct op" severity warning;
assert OY = '0' report "should return correct op" severity warning;
assert OHLT = '0' report "should return correct op" severity warning;
assert ONOP = '0' report "should return correct op" severity warning;
OP <= "00000011";
wait for 10 ns;
assert OADD = '0' report "should return correct op" severity warning;
assert OAND = '0' report "should return correct op" severity warning;
assert OOR = '1' report "should return correct op" severity warning;
assert ONOT = '0' report "should return correct op" severity warning;
assert OY = '0' report "should return correct op" severity warning;
assert OHLT = '0' report "should return correct op" severity warning;
assert ONOP = '0' report "should return correct op" severity warning;
OP <= "00000100";
wait for 10 ns;
assert OADD = '0' report "should return correct op" severity warning;
assert OAND = '0' report "should return correct op" severity warning;
assert OOR = '0' report "should return correct op" severity warning;
assert ONOT = '1' report "should return correct op" severity warning;
assert OY = '0' report "should return correct op" severity warning;
assert OHLT = '0' report "should return correct op" severity warning;
assert ONOP = '0' report "should return correct op" severity warning;
OP <= "00000101";
wait for 10 ns;
assert OADD = '0' report "should return correct op" severity warning;
assert OAND = '0' report "should return correct op" severity warning;
assert OOR = '0' report "should return correct op" severity warning;
assert ONOT = '0' report "should return correct op" severity warning;
assert OY = '1' report "should return correct op" severity warning;
assert OHLT = '0' report "should return correct op" severity warning;
assert ONOP = '0' report "should return correct op" severity warning;
OP <= "00000110";
wait for 10 ns;
assert OADD = '0' report "should return correct op" severity warning;
assert OAND = '0' report "should return correct op" severity warning;
assert OOR = '0' report "should return correct op" severity warning;
assert ONOT = '0' report "should return correct op" severity warning;
assert OY = '0' report "should return correct op" severity warning;
assert OHLT = '1' report "should return correct op" severity warning;
assert ONOP = '0' report "should return correct op" severity warning;
end process;
end HEHE;