testsuite/synth: add mem2d01 tests.

1 files changed, 92 insertions, 0 deletions

diff --git a/testsuite/synth/mem2d01/tb_dpram2w.vhdl b/testsuite/synth/mem2d01/tb_dpram2w.vhdl
new file mode 100644
index 000000000..80850d92f
--- /dev/null
+++ b/testsuite/synth/mem2d01/tb_dpram2w.vhdl
@@ -0,0 +1,92 @@
+entity tb_dpram2w is
+end tb_dpram2w;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+architecture behav of tb_dpram2w is
+  signal waddr : natural range 0 to 3;
+  signal wnib : natural range 0 to 1;
+  signal wdat : std_logic_vector (3 downto 0);
+  signal raddr : natural range 0 to 3;
+  signal rdat : std_logic_vector(7 downto 0);
+  signal clk : std_logic;
+begin
+  dut: entity work.dpram2w
+    port map (waddr => waddr, wnib => wnib, wdat => wdat,
+              raddr => raddr, rdat => rdat,
+              clk => clk);
+
+  process
+    procedure pulse is
+    begin
+      clk <= '0';
+      wait for 1 ns;
+      clk <= '1';
+      wait for 1 ns;
+    end pulse;
+  begin
+    waddr <= 0;
+    wnib <= 0;
+    wdat <= x"0";
+    raddr <= 1;
+    pulse;
+
+    waddr <= 0;
+    wnib <= 1;
+    wdat <= x"f";
+    raddr <= 1;
+    pulse;
+
+    waddr <= 1;
+    wnib <= 1;
+    wdat <= x"e";
+    raddr <= 0;
+    pulse;
+    assert rdat = x"f0" severity failure;
+
+    waddr <= 1;
+    wnib <= 0;
+    wdat <= x"1";
+    raddr <= 0;
+    pulse;
+    assert rdat = x"f0" severity failure;
+
+    waddr <= 3;
+    wnib <= 0;
+    wdat <= x"3";
+    raddr <= 1;
+    pulse;
+    assert rdat = x"e1" severity failure;
+
+    waddr <= 3;
+    wnib <= 1;
+    wdat <= x"c";
+    raddr <= 1;
+    pulse;
+    assert rdat = x"e1" severity failure;
+
+    waddr <= 2;
+    wnib <= 1;
+    wdat <= x"d";
+    raddr <= 3;
+    pulse;
+    assert rdat = x"c3" severity failure;
+
+    waddr <= 2;
+    wnib <= 0;
+    wdat <= x"2";
+    raddr <= 3;
+    pulse;
+    assert rdat = x"c3" severity failure;
+
+    waddr <= 1;
+    wnib <= 0;
+    wdat <= x"1";
+    raddr <= 2;
+    pulse;
+    assert rdat = x"d2" severity failure;
+
+    wait;
+  end process;
+end behav;