1 files changed, 47 insertions, 0 deletions
diff --git a/testsuite/synth/dff01/tb_dff09.vhdl b/testsuite/synth/dff01/tb_dff09.vhdl
new file mode 100644
index 000000000..87df0bb6a
--- /dev/null
+++ b/testsuite/synth/dff01/tb_dff09.vhdl
@@ -0,0 +1,47 @@
+entity tb_dff09 is
+end tb_dff09;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+architecture behav of tb_dff09 is
+  signal clk : std_logic;
+  signal rstn : std_logic;
+  signal din : std_logic;
+  signal dout : std_logic;
+begin
+  dut: entity work.dff09
+    port map (
+      q => dout,
+      d => din,
+      clk => clk,
+      rstn => rstn);
+
+  process
+    procedure pulse is
+    begin
+      clk <= '0';
+      wait for 1 ns;
+      clk <= '1';
+      wait for 1 ns;
+    end pulse;
+  begin
+    rstn <= '0';
+    wait for 1 ns;
+    assert dout = '0' severity failure;
+    rstn <= '1';
+    din <= '1';
+    pulse;
+    assert dout = '1' severity failure;
+    din <= '0';
+    pulse;
+    assert dout = '0' severity failure;
+    din <= '1';
+    pulse;
+    assert dout = '1' severity failure;
+    rstn <= '0';
+    wait for 1 ns;
+    assert dout = '0' severity failure;
+    wait;
+  end process;
+end behav;