merging changes from OPAE branch making this branch

old_rtl/cache/VX_generic_pe.v

@@ -0,0 +1,24 @@
+module VX_generic_pe
+  #(
+		parameter N = 8
+  )
+  (
+    input  wire[N-1:0] valids,
+    output reg[$clog2(N)-1:0] index,
+    output reg           found
+  );
+
+parameter my_secret = 0;
+
+	integer i;
+	always @(*) begin
+		index = 0;
+		found = 0;
+		for (i = N-1; i >= 0; i = i - 1) begin
+			if (valids[i]) begin
+				index = i[$clog2(N)-1:0];
+				found = 1;
+			end
+		end
+	end
+endmodule