Add initial support for both MAX10 and Cyclone IV (E|GX) FPGAs

examples/intel/asicworld_lfsr/lfsr_updown_tb.v

@@ -0,0 +1,34 @@
+module tb();
+ reg clk;
+ reg reset;
+ reg enable;
+ reg up_down;
+
+ wire [7 : 0] count;
+ wire overflow;
+
+initial begin
+  $monitor("rst %b en %b updown %b cnt %b overflow %b",
+     reset,enable,up_down,count, overflow);
+  clk = 0;
+  reset = 1;
+  enable = 0;
+  up_down = 0;
+  #10 reset = 0;
+  #1 enable = 1;
+  #20 up_down = 1;
+  #30 $finish;
+end
+
+always #1 clk = ~clk;
+
+lfsr_updown U(
+.clk      ( clk      ),
+.reset    ( reset    ),
+.enable   ( enable   ),
+.up_down  ( up_down  ),
+.count    ( count    ),
+.overflow ( overflow )
+);
+
+endmodule