testsuite/synth: add a test for previous commit.

1 files changed, 37 insertions, 0 deletions

diff --git a/testsuite/synth/subprg01/tb_subprg02.vhdl b/testsuite/synth/subprg01/tb_subprg02.vhdl
new file mode 100644
index 000000000..0736990a7
--- /dev/null
+++ b/testsuite/synth/subprg01/tb_subprg02.vhdl
@@ -0,0 +1,37 @@
+entity tb_subprg02 is
+end tb_subprg02;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+architecture behav of tb_subprg02 is
+  signal a, na : std_logic_vector (3 downto 0);
+  signal n : natural range 0 to 1;
+  signal clk : std_logic;
+begin
+  dut: entity work.subprg02
+    port map (a, n, clk, na);
+
+  process
+    procedure pulse is
+    begin
+      wait for 1 ns;
+      clk <= '1';
+      wait for 1 ns;
+      clk <= '0';
+    end pulse;
+  begin
+    n <= 0;
+    clk <= '0';
+
+    a <= x"0";
+    pulse;
+    assert na = x"f" severity failure;
+
+    a <= x"5";
+    pulse;
+    assert na = x"a" severity failure;
+
+    wait;
+  end process;
+end behav;