1 files changed, 58 insertions, 0 deletions
diff --git a/testsuite/synth/issue1079/tb_test2.vhdl b/testsuite/synth/issue1079/tb_test2.vhdl
new file mode 100644
index 000000000..27f6037b0
--- /dev/null
+++ b/testsuite/synth/issue1079/tb_test2.vhdl
@@ -0,0 +1,58 @@
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity tb_test2 is
+end;
+
+architecture behav of tb_test2 is
+  signal clk     : std_logic;
+  signal rd_en   : std_logic;
+  signal rd_addr : std_logic_vector(7 downto 0);
+  signal rd_data : std_logic_vector(63 downto 0);
+  signal wr_en   : std_logic;
+  signal wr_sel  : std_logic_vector(7 downto 0);
+  signal wr_addr : std_logic_vector(7 downto 0);
+  signal wr_data : std_logic_vector(63 downto 0);
+begin
+  inst_test2: entity work.test2
+    port map (
+      clk     => clk,
+      rd_en   => rd_en,
+      rd_addr => rd_addr,
+      rd_data => rd_data,
+      wr_en   => wr_en,
+      wr_sel  => wr_sel,
+      wr_addr => wr_addr,
+      wr_data => wr_data);
+
+  process
+    procedure pulse is
+    begin
+      clk <= '0';
+      wait for 5 ns;
+      clk <= '1';
+      wait for 5 ns;
+    end pulse;
+  begin
+    rd_en <= '0';
+    wr_en <= '0';
+    wr_sel <= x"ff";
+    pulse;
+
+    wr_en <= '1';
+    wr_addr <= x"01";
+    wr_data <= x"01_12_34_56_78_9a_bc_de";
+    pulse;
+
+    wr_en <= '1';
+    wr_addr <= x"02";
+    wr_data <= x"02_12_34_56_78_9a_bc_de";
+
+    rd_en <= '1';
+    rd_addr <= x"01";
+    pulse;
+
+    assert rd_data = x"01_12_34_56_78_9a_bc_de";
+    wait;
+  end process;
+end behav;