1 files changed, 26 insertions, 0 deletions
diff --git a/testsuite/synth/ret01/tb_ret01.vhdl b/testsuite/synth/ret01/tb_ret01.vhdl
new file mode 100644
index 000000000..469164c32
--- /dev/null
+++ b/testsuite/synth/ret01/tb_ret01.vhdl
@@ -0,0 +1,26 @@
+entity tb_ret01 is
+end tb_ret01;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+architecture behav of tb_ret01 is
+  signal d : std_logic_vector (7 downto 0);
+  signal r : integer;
+begin
+  dut: entity work.ret01
+    port map (d, r);
+
+  process
+  begin
+    d <= x"01";
+    wait for 1 ns;
+    assert r = 1 severity failure;
+
+    d <= x"f1";
+    wait for 1 ns;
+    assert r = -1 severity failure;
+
+    wait;
+  end process;
+end behav;