testsuite/synth: add tests for concurrent dff

5 files changed, 131 insertions, 0 deletions

diff --git a/testsuite/synth/dff05/dff01.vhdl b/testsuite/synth/dff05/dff01.vhdl
new file mode 100644
index 000000000..f16e614dc
--- /dev/null
+++ b/testsuite/synth/dff05/dff01.vhdl
@@ -0,0 +1,13 @@
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity dff01 is
+  port (q : out std_logic;
+        d : std_logic;
+        clk : std_logic);
+end dff01;
+
+architecture behav of dff01 is
+begin
+  q <= d when rising_edge (clk);
+end behav;
diff --git a/testsuite/synth/dff05/dff02.vhdl b/testsuite/synth/dff05/dff02.vhdl
new file mode 100644
index 000000000..09d10e29c
--- /dev/null
+++ b/testsuite/synth/dff05/dff02.vhdl
@@ -0,0 +1,14 @@
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity dff02 is
+  port (q : out std_logic;
+        d : std_logic;
+        clk : std_logic;
+        rst : std_logic);
+end dff02;
+
+architecture behav of dff02 is
+begin
+  q <= '0' when rst = '1' else d when rising_edge (clk);
+end behav;
diff --git a/testsuite/synth/dff05/tb_dff01.vhdl b/testsuite/synth/dff05/tb_dff01.vhdl
new file mode 100644
index 000000000..7008a8b95
--- /dev/null
+++ b/testsuite/synth/dff05/tb_dff01.vhdl
@@ -0,0 +1,40 @@
+entity tb_dff01 is
+end tb_dff01;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+architecture behav of tb_dff01 is
+  signal clk : std_logic;
+  signal din : std_logic;
+  signal dout : std_logic;
+begin
+  dut: entity work.dff01
+    port map (
+      q => dout,
+      d => din,
+      clk => clk);
+
+  process
+    procedure pulse is
+    begin
+      clk <= '0';
+      wait for 1 ns;
+      clk <= '1';
+      wait for 1 ns;
+    end pulse;
+  begin
+    din <= '0';
+    pulse;
+    assert dout = '0' severity failure;
+    din <= '1';
+    pulse;
+    assert dout = '1' severity failure;
+    pulse;
+    assert dout = '1' severity failure;
+    din <= '0';
+    pulse;
+    assert dout = '0' severity failure;
+    wait;
+  end process;
+end behav;
diff --git a/testsuite/synth/dff05/tb_dff02.vhdl b/testsuite/synth/dff05/tb_dff02.vhdl
new file mode 100644
index 000000000..d22a3bd9c
--- /dev/null
+++ b/testsuite/synth/dff05/tb_dff02.vhdl
@@ -0,0 +1,55 @@
+entity tb_dff02 is
+end tb_dff02;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+architecture behav of tb_dff02 is
+  signal clk : std_logic;
+  signal din : std_logic;
+  signal dout : std_logic;
+  signal rst : std_logic;
+begin
+  dut: entity work.dff02
+    port map (
+      q => dout,
+      d => din,
+      clk => clk,
+      rst => rst);
+
+  process
+    procedure pulse is
+    begin
+      clk <= '0';
+      wait for 1 ns;
+      clk <= '1';
+      wait for 1 ns;
+    end pulse;
+  begin
+    rst <= '1';
+    wait for 1 ns;
+    assert dout = '0' severity failure;
+
+    rst <= '0';
+    din <= '1';
+    pulse;
+    assert dout = '1' severity failure;
+
+    din <= '0';
+    pulse;
+    assert dout = '0' severity failure;
+
+    pulse;
+    assert dout = '0' severity failure;
+
+    din <= '1';
+    pulse;
+    assert dout = '1' severity failure;
+
+    rst <= '1';
+    wait for 1 ns;
+    assert dout = '0' severity failure;
+
+    wait;
+  end process;
+end behav;
diff --git a/testsuite/synth/dff05/testsuite.sh b/testsuite/synth/dff05/testsuite.sh
new file mode 100755
index 000000000..a86174437
--- /dev/null
+++ b/testsuite/synth/dff05/testsuite.sh
@@ -0,0 +1,9 @@
+#! /bin/sh
+
+. ../../testenv.sh
+
+for t in dff01 dff02; do
+    synth_tb $t
+done
+
+echo "Test successful"