1 files changed, 38 insertions, 0 deletions
diff --git a/testsuite/synth/var01/tb_var04.vhdl b/testsuite/synth/var01/tb_var04.vhdl
new file mode 100644
index 000000000..2de5ffcc2
--- /dev/null
+++ b/testsuite/synth/var01/tb_var04.vhdl
@@ -0,0 +1,38 @@
+entity tb_var04 is
+end tb_var04;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+architecture behav of tb_var04 is
+  signal clk : std_logic;
+  signal mask : std_logic_vector (1 downto 0);
+  signal val : std_logic_vector (15 downto 0);
+  signal res : std_logic_vector (15 downto 0);
+begin
+  dut: entity work.var04
+    port map (
+      mask => mask,
+      val => val,
+      res => res);
+
+  process
+  begin
+    mask <= "11";
+    val <= x"aa_bb";
+    wait for 1 ns;
+    assert res = x"aa_bb" severity failure;
+
+    mask <= "00";
+    val <= x"12_34";
+    wait for 1 ns;
+    assert res = x"00_00" severity failure;
+
+    mask <= "10";
+    val <= x"12_34";
+    wait for 1 ns;
+    assert res = x"12_00" severity failure;
+
+    wait;
+  end process;
+end behav;