Add combinational repeater module

Author: pConst

comb_repeater.sv

@@ -0,0 +1,64 @@
+//------------------------------------------------------------------------------
+// comb_repeater.sv
+// Konstantin Pavlov, [email protected]
+//------------------------------------------------------------------------------
+
+// INFO ------------------------------------------------------------------------
+// Combinational signal repeater
+//
+// Every stage consists of two sequential inverters
+// Configurable number of stages
+//
+// Adapted for AMD/Xilinx devices
+//
+
+
+/* --- INSTANTIATION TEMPLATE BEGIN ---
+
+comb_repeater #(
+    .LENGTH( 2 ),
+    .WIDTH( 1 )
+) R1 (
+    .in(  ),
+    .out(  )
+);
+
+--- INSTANTIATION TEMPLATE END ---*/
+
+
+module comb_repeater #( parameter
+  LENGTH = 1,                  // repeater chain length
+  WIDTH = 1                    // repeater bus width
+)(
+  input [WIDTH-1:0] in,
+  output logic [WIDTH-1:0] out
+);
+
+
+  (* DONT_TOUCH = "TRUE" *) logic [LENGTH-1:0][WIDTH-1:0] s1; // first inverter outputs
+  (* DONT_TOUCH = "TRUE" *) logic [LENGTH-1:0][WIDTH-1:0] s2; // second inverter outputs
+
+  genvar i;
+  generate
+    for( i=0; i<LENGTH; i=i+1 ) begin
+
+      always_comb begin
+
+        if( i==(LENGTH-1) ) begin
+          s1[i][WIDTH-1:0] <= ~in[WIDTH-1:0];
+        end else begin
+          s1[i][WIDTH-1:0] <= ~s2[i+1][WIDTH-1:0];
+        end
+
+        if( i==0 ) begin
+          out[WIDTH-1:0] <= ~s1[i][WIDTH-1:0];
+        end else begin
+          s2[i][WIDTH-1:0] <= ~s1[i][WIDTH-1:0];
+        end
+      end
+
+    end // for
+  endgenerate
+
+endmodule
+