testsuite/synth: add more tests for #1122

1 files changed, 55 insertions, 0 deletions

diff --git a/testsuite/synth/dff02/tb_dff08d.vhdl b/testsuite/synth/dff02/tb_dff08d.vhdl
new file mode 100644
index 000000000..b096a8de2
--- /dev/null
+++ b/testsuite/synth/dff02/tb_dff08d.vhdl
@@ -0,0 +1,55 @@
+entity tb_dff08d is
+end tb_dff08d;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+architecture behav of tb_dff08d is
+  signal clk : std_logic;
+  signal rst : std_logic;
+  signal en : std_logic;
+  signal din : std_logic_vector (7 downto 0);
+  signal dout : std_logic_vector (7 downto 0);
+begin
+  dut: entity work.dff08d
+    port map (
+      q => dout,
+      d => din,
+      en => en,
+      clk => clk,
+      rst => rst);
+
+  process
+    procedure pulse is
+    begin
+      clk <= '0';
+      wait for 1 ns;
+      clk <= '1';
+      wait for 1 ns;
+    end pulse;
+  begin
+    wait for 1 ns;
+    assert dout = x"aa" severity failure;
+
+    rst <= '1';
+    pulse;
+    assert dout = x"aa" severity failure;
+
+    rst <= '0';
+    din <= x"38";
+    pulse;
+    assert dout = x"38" severity failure;
+
+    din <= x"af";
+    pulse;
+    assert dout = x"af" severity failure;
+
+    en <= '1';
+    rst <= '1';
+    din <= x"b5";
+    pulse;
+    assert dout = x"aa" severity failure;
+
+    wait;
+  end process;
+end behav;