1 files changed, 22 insertions, 0 deletions
diff --git a/testsuite/synth/issue973/tb_ent.vhdl b/testsuite/synth/issue973/tb_ent.vhdl
new file mode 100644
index 000000000..328d48180
--- /dev/null
+++ b/testsuite/synth/issue973/tb_ent.vhdl
@@ -0,0 +1,22 @@
+entity tb_ent is
+end tb_ent;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+architecture behav of tb_ent is
+  signal i : std_logic_vector (7 downto 0);
+  signal o : std_logic_vector (3 downto 0);
+begin
+  dut: entity work.ent
+    port map (i, o);
+
+  process
+  begin
+    i <= x"b6";
+    wait for 1 ns;
+    assert o = x"b" severity failure;
+
+    wait;
+  end process;
+end behav;