|  | // Copyright (C) 2020-2021  The SymbiFlow Authors. | 
|  | // | 
|  | // Use of this source code is governed by a ISC-style | 
|  | // license that can be found in the LICENSE file or at | 
|  | // https://opensource.org/licenses/ISC | 
|  | // | 
|  | // SPDX-License-Identifier:ISC | 
|  |  | 
|  | 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 |