merging changes from OPAE branch making this branch

old_rtl/VX_generic_priority_encoder.v

@@ -0,0 +1,27 @@
+`include "../VX_define.v"
+
+module VX_generic_priority_encoder
+  #(
+  	parameter N = 1
+  )
+  (
+    input  wire[N-1:0] valids,
+    //output reg[$clog2(N)-1:0] index,
+    output reg[(`CLOG2(N))-1:0] index,
+    //output reg[`CLOG2(N):0] index, // eh
+    output reg           found
+  );
+
+	integer i;
+	always @(*) begin
+		index = 0;
+		found = 0;
+		for (i = N-1; i >= 0; i = i - 1) begin
+			if (valids[i]) begin
+				//index = i[$clog2(N)-1:0];
+        		index = i[(`CLOG2(N))-1:0];
+				found = 1;
+			end
+		end
+	end
+endmodule