1 files changed, 51 insertions, 0 deletions
diff --git a/testsuite/synth/var01/tb_var01b.vhdl b/testsuite/synth/var01/tb_var01b.vhdl
new file mode 100644
index 000000000..6d5e9e395
--- /dev/null
+++ b/testsuite/synth/var01/tb_var01b.vhdl
@@ -0,0 +1,51 @@
+entity tb_var01b is
+end tb_var01b;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+architecture behav of tb_var01b is
+  signal clk : std_logic;
+  signal mask : std_logic_vector (1 downto 0);
+  signal val : std_logic_vector (3 downto 0);
+  signal res : std_logic_vector (3 downto 0);
+begin
+  dut: entity work.var01b
+    port map (
+      clk => clk,
+      mask => mask,
+      val => val,
+      res => res);
+
+  process
+    procedure pulse is
+    begin
+      clk <= '0';
+      wait for 1 ns;
+      clk <= '1';
+      wait for 1 ns;
+    end pulse;
+  begin
+    mask <= "11";
+    val <= b"00_01";
+    pulse;
+    assert res = b"00_01" report "res=" & to_bstring (res) severity failure;
+
+    mask <= "10";
+    val <= b"11_00";
+    pulse;
+    assert res = b"11_01" severity failure;
+
+    mask <= "00";
+    val <= b"00_00";
+    pulse;
+    assert res = b"11_01" severity failure;
+
+    mask <= "01";
+    val <= b"00_10";
+    pulse;
+    assert res = b"11_10" severity failure;
+
+    wait;
+  end process;
+end behav;