1 files changed, 103 insertions, 0 deletions
diff --git a/testsuite/gna/issue886/ent.vhdl b/testsuite/gna/issue886/ent.vhdl
new file mode 100644
index 000000000..f1d9e4dfd
--- /dev/null
+++ b/testsuite/gna/issue886/ent.vhdl
@@ -0,0 +1,103 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+package pong_pkg is
+    subtype short is signed(16 downto 0);
+
+    type direction is (UP, DOWN, NONE);
+    type dimension is record
+        w : short;
+        h : short;
+    end record;
+
+    constant SCREEN_SIZE : dimension := (   w => to_signed(640, short'length), 
+                                            h => to_signed(480, short'length) );
+
+    type location is record
+        r : short;
+        c : short;
+    end record;    
+    
+    type paddle is record
+        loc : location;
+        dir : direction;
+    end record;    
+
+    component paddle_mover is
+        generic(
+            paddle_size : dimension;
+            screen_size : dimension;
+            reset_loc   : location
+        );
+        port(
+            clk : in std_logic;
+            en  : in std_logic;
+            rst : in std_logic;
+            dir : in direction;
+            q   : in paddle;
+            d   : out paddle
+        );
+    end component;
+end package;
+
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+use work.pong_pkg.all;
+
+entity paddle_mover is
+generic(
+    paddle_size : dimension := (w => to_signed(1, short'length), h => to_signed(1 short'length));
+    screen_size : dimension := (w => to_signed(1, short'length), h => to_signed(1 short'length));
+    reset_loc   : location  := (r => to_signed(1, short'length), c => to_signed(1 short'length))
+);
+port(
+    clk : in std_logic;
+    en  : in std_logic;
+    rst : in std_logic;
+    dir : in direction;
+    q   : in paddle;
+    d   : out paddle
+);
+end entity;
+
+architecture beh of paddle_mover is
+        
+    constant velocity   : short     := to_signed(1, short'length);
+
+    signal next_candidate :paddle   := (dir => NONE, loc => (others => 1));
+    signal next_paddle  : paddle    := (dir => NONE, loc => (others => 1));
+    signal next_moves   : std_logic := '0';
+    signal off_bottom   : std_logic := '0';
+    signal off_top      : std_logic := '0';
+begin
+   
+    next_candidate.dir <= q.dir;
+    next_candidate.loc.c <= q.loc.c;
+
+    next_candidate.loc.r <= q.loc.r + velocity when dir = DOWN else 
+                            q.loc.r - velocity when dir = UP else 
+                            q.loc.r;
+    
+    off_bottom <= (next_candidate.loc.r + paddle_size.h) >= screen_size.h;
+    off_top    <= next_candidate.loc.r <= to_unsigned(0, short'length);
+
+    next_moves <= off_bottom nor off_top;
+
+    next_paddle.dir   <= next_candidate.dir;
+    next_paddle.loc.c  <= next_candidate.loc.c;
+    next_paddle.loc.r  <= next_candidate.loc.r when next_moves = '1' else q.loc.r;
+    
+    process(clk)
+    begin
+        if rising_edge(clk) then
+            if rst = '1' then
+                d.loc <= reset_loc;
+            elsif en = '1' then
+                d <= next_paddle;
+            end if;
+        end if;
+    end process;      
+end architecture;