refactor dir structure, add fib.c

1 files changed, 0 insertions, 121 deletions

diff --git a/PIC/tb_stack.vhd b/PIC/tb_stack.vhd
deleted file mode 100644
index 5b386e9..0000000
--- a/PIC/tb_stack.vhd
+++ /dev/null
@@ -1,121 +0,0 @@
-library ieee;
-use ieee.std_logic_1164.all;
-use ieee.numeric_std.all;
-
-entity tb_stack is
-end entity tb_stack;
-
-architecture behavioural of tb_stack is
-  constant T_clk : time := 10 ns;
-  constant W     : positive := 13;
-
-  signal clk   : std_logic := '0';
-  signal reset : std_logic := '0';
-  signal push  : std_logic := '0';
-  signal pop   : std_logic := '0';
-  signal din   : std_logic_vector(W - 1 downto 0) := (others => '0');
-  signal dout  : std_logic_vector(W - 1 downto 0);
-
-  signal done : boolean := false;
-
-  procedure tick(signal clk_in : in std_logic) is
-  begin
-    wait until rising_edge(clk_in);
-    wait for 1 ns;
-  end procedure;
-
-begin
-
-  clk <= not clk after T_clk / 2 when not done else unaffected;
-
-  dut : entity work.stack(rtl)
-    generic map (DEPTH => 8, WIDTH => W)
-    port map (
-      clk   => clk,
-      reset => reset,
-      push  => push,
-      pop   => pop,
-      din   => din,
-      dout  => dout
-    );
-
-  stimulus : process is
-  begin
-
-    -- test 1: reset clears stack
-    report "test 1: reset";
-    reset <= '1';
-    wait for T_clk;
-    reset <= '0';
-    wait for 1 ns;
-    assert dout = std_logic_vector(to_unsigned(0, W))
-      report "reset: dout should be 0" severity error;
-
-    -- test 2: push one value and read it back
-    report "test 2: push/pop single value";
-    din  <= std_logic_vector(to_unsigned(16#42#, W));
-    push <= '1';
-    tick(clk);
-    push <= '0';
-    assert dout = std_logic_vector(to_unsigned(16#42#, W))
-      report "push: dout should be 0x42" severity error;
-    pop <= '1';
-    tick(clk);
-    pop <= '0';
-    assert dout = std_logic_vector(to_unsigned(0, W))
-      report "pop: dout should be 0 (empty)" severity error;
-
-    -- test 3: push multiple values, pop in LIFO order
-    report "test 3: LIFO order";
-    din  <= std_logic_vector(to_unsigned(16#100#, W));
-    push <= '1';
-    tick(clk);
-    din  <= std_logic_vector(to_unsigned(16#200#, W));
-    tick(clk);
-    din  <= std_logic_vector(to_unsigned(16#300#, W));
-    tick(clk);
-    push <= '0';
-    assert dout = std_logic_vector(to_unsigned(16#300#, W))
-      report "LIFO: top should be 0x300" severity error;
-    pop <= '1';
-    tick(clk);
-    assert dout = std_logic_vector(to_unsigned(16#200#, W))
-      report "LIFO: after 1 pop should be 0x200" severity error;
-    tick(clk);
-    assert dout = std_logic_vector(to_unsigned(16#100#, W))
-      report "LIFO: after 2 pops should be 0x100" severity error;
-    tick(clk);
-    pop <= '0';
-    assert dout = std_logic_vector(to_unsigned(0, W))
-      report "LIFO: stack empty, dout should be 0" severity error;
-
-    report "test 4: overflow wraparound";
-    push <= '1';
-    for i in 1 to 8 loop
-      din <= std_logic_vector(to_unsigned(i, W));
-      tick(clk);
-    end loop;
-    push <= '0';
-    -- after 8 pushes top wraps to 0, so stack looks empty
-    assert dout = std_logic_vector(to_unsigned(0, W))
-      report "overflow: top wrapped to 0, dout should be 0" severity error;
-
-    -- test 5: reset mid-operation clears pointer
-    report "test 5: reset mid-operation";
-    din  <= std_logic_vector(to_unsigned(16#1FF#, W));
-    push <= '1';
-    tick(clk);
-    push <= '0';
-    reset <= '1';
-    wait for T_clk;
-    reset <= '0';
-    wait for 1 ns;
-    assert dout = std_logic_vector(to_unsigned(0, W))
-      report "reset mid-op: dout should be 0" severity error;
-
-    report "All stack tests done" severity note;
-    done <= true;
-    wait;
-  end process stimulus;
-
-end architecture behavioural;