|  | // Copyright 2020-2022 F4PGA Authors | 
|  | // | 
|  | // Licensed under the Apache License, Version 2.0 (the "License"); | 
|  | // you may not use this file except in compliance with the License. | 
|  | // You may obtain a copy of the License at | 
|  | // | 
|  | //     http://www.apache.org/licenses/LICENSE-2.0 | 
|  | // | 
|  | // Unless required by applicable law or agreed to in writing, software | 
|  | // distributed under the License is distributed on an "AS IS" BASIS, | 
|  | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | 
|  | // See the License for the specific language governing permissions and | 
|  | // limitations under the License. | 
|  | // | 
|  | // SPDX-License-Identifier: Apache-2.0 | 
|  |  | 
|  | module top ( | 
|  | input wire clk0, | 
|  | input wire clk1, | 
|  | (* clkbuf_inhibit *) | 
|  | input wire clk2, | 
|  | (* clkbuf_inhibit *) | 
|  | input wire clk3, | 
|  |  | 
|  | input  wire [3:0] d, | 
|  | output reg  [3:0] q | 
|  | ); | 
|  |  | 
|  | always @(posedge clk0) q[0] <= d[0]; | 
|  | always @(posedge clk1) q[1] <= d[1]; | 
|  | always @(posedge clk2) q[2] <= d[2]; | 
|  | always @(posedge clk3) q[3] <= d[3]; | 
|  |  | 
|  | endmodule |