1 files changed, 41 insertions, 0 deletions
diff --git a/testsuite/synth/issue1218/tb_top.vhdl b/testsuite/synth/issue1218/tb_top.vhdl
new file mode 100644
index 000000000..590913c9b
--- /dev/null
+++ b/testsuite/synth/issue1218/tb_top.vhdl
@@ -0,0 +1,41 @@
+entity tb_top is
+end tb_top;
+
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+architecture behav of tb_top is
+  signal ch : integer range 0 to 7;
+  signal din : unsigned(7 downto 0);
+  signal dout : unsigned(7 downto 0);
+begin
+  dut: entity work.top
+    port map (ch, din, dout);
+
+  process
+  begin
+    report "test shift by 0 + 1";
+    
+    ch <= 0;
+    din <= x"e7";
+    wait for 1 ns;
+    assert dout = x"73" severity failure;
+
+    report "test shift by 3 + 1";
+    
+    ch <= 3;
+    din <= x"7e";
+    wait for 1 ns;
+    assert dout = x"07" severity failure;
+
+    report "test shift by 7 + 1";
+    
+    ch <= 7;
+    din <= x"9b";
+    wait for 1 ns;
+    assert dout = x"00" severity failure;
+
+    wait;
+  end process;
+end behav;