initial commit for open source NoC IP

rtl/model/cells/std_dffre.sv

@@ -0,0 +1,36 @@
+//===============================================
+//Name          : STD_DFFRE
+//Author        : cuiluping
+//Email         : luping.cui@rivai-ic.com.cn
+//Date          : 2019-08-24
+//Description   : with reset ,with enable D flip flop
+//-----------------------------------------------
+//All Rights Reserved by rivai company
+//===============================================
+
+module std_dffre
+#(
+    parameter WIDTH = 8
+)
+(
+    input                       clk,
+    input                       rstn,
+    input                       en,
+    input       [WIDTH-1:0]     d,
+    output      [WIDTH-1:0]     q
+);
+
+logic     [WIDTH-1:0]     dff_q;
+
+always_ff @(posedge clk or negedge rstn) begin
+    if(~rstn)begin
+        dff_q <= {WIDTH{1'b0}};
+    end
+    else if(en)begin
+        dff_q <= d;
+    end
+end
+
+assign  q = dff_q;
+
+endmodule