1 files changed, 98 insertions, 0 deletions
diff --git a/testsuite/synth/issue963/tb_ent2.vhdl b/testsuite/synth/issue963/tb_ent2.vhdl
new file mode 100644
index 000000000..daf1865cb
--- /dev/null
+++ b/testsuite/synth/issue963/tb_ent2.vhdl
@@ -0,0 +1,98 @@
+entity tb_ent2 is
+end tb_ent2;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+architecture behav of tb_ent2 is
+  signal clk : std_logic;
+  signal dout : std_logic_vector(3 downto 0);
+  signal set_0 : std_logic;
+  signal set_a : std_logic;
+  signal set_f : std_logic;
+  signal set_7 : std_logic;
+begin
+  dut: entity work.ent2
+    port map (
+      set_0 => set_0,
+      set_a => set_a,
+      set_f => set_f,
+      set_7 => set_7,
+      q => dout,
+      clk => clk);
+
+  process
+    procedure pulse is
+    begin
+      clk <= '0';
+      wait for 1 ns;
+      clk <= '1';
+      wait for 1 ns;
+    end pulse;
+  begin
+    set_0 <= '1';
+    set_a <= '0';
+    set_f <= '0';
+    set_7 <= '0';
+    pulse;
+    assert dout = x"0" severity failure;
+
+    set_0 <= '0';
+    set_a <= '0';
+    set_f <= '0';
+    set_7 <= '0';
+    pulse;
+    assert dout = x"1" severity failure;
+
+    set_0 <= '0';
+    set_a <= '0';
+    set_f <= '0';
+    set_7 <= '0';
+    pulse;
+    assert dout = x"2" severity failure;
+
+    set_0 <= '0';
+    set_a <= '1';
+    set_f <= '0';
+    set_7 <= '0';
+    pulse;
+    assert dout = x"a" severity failure;
+
+    set_0 <= '0';
+    set_a <= '0';
+    set_f <= '0';
+    set_7 <= '0';
+    pulse;
+    assert dout = x"b" severity failure;
+
+    set_0 <= '0';
+    set_a <= '0';
+    set_f <= '1';
+    set_7 <= '0';
+    pulse;
+    assert dout = x"f" severity failure;
+
+    set_0 <= '0';
+    set_a <= '0';
+    set_f <= '0';
+    set_7 <= '1';
+    pulse;
+    assert dout = x"7" severity failure;
+
+    set_0 <= '1';
+    set_a <= '0';
+    set_f <= '0';
+    set_7 <= '1';
+    pulse;
+    assert dout = x"0" severity failure;
+
+    set_0 <= '0';
+    set_a <= '1';
+    set_f <= '0';
+    set_7 <= '1';
+    pulse;
+    assert dout = x"a" severity failure;
+
+    wait;
+  end process;
+end behav;