| // DESCRIPTION: Verilator: Verilog Test module |
| // |
| // This file ONLY is placed into the Public Domain, for any use, |
| // without warranty, 2004 by Wilson Snyder. |
| |
| module t (/*AUTOARG*/ |
| // Inputs |
| clk |
| ); |
| |
| input clk; |
| integer cyc; initial cyc=1; |
| |
| reg [125:0] a; |
| wire q; |
| |
| sub sub ( |
| .q (q), |
| .a (a), |
| .clk (clk)); |
| |
| always @ (posedge clk) begin |
| if (cyc!=0) begin |
| cyc <= cyc + 1; |
| if (cyc==1) begin |
| a <= 126'b1000; |
| end |
| if (cyc==2) begin |
| a <= 126'h1001; |
| end |
| if (cyc==3) begin |
| a <= 126'h1010; |
| end |
| if (cyc==4) begin |
| a <= 126'h1111; |
| if (q !== 1'b0) $stop; |
| end |
| if (cyc==5) begin |
| if (q !== 1'b1) $stop; |
| end |
| if (cyc==6) begin |
| if (q !== 1'b0) $stop; |
| end |
| if (cyc==7) begin |
| if (q !== 1'b0) $stop; |
| end |
| if (cyc==8) begin |
| if (q !== 1'b0) $stop; |
| $write("*-* All Finished *-*\n"); |
| $finish; |
| end |
| end |
| end |
| |
| endmodule |
| |
| module sub ( |
| input clk, |
| input [125:0] a, |
| output reg q |
| ); |
| |
| // verilator public_module |
| |
| reg [125:0] g_r; |
| |
| wire [127:0] g_extend = { g_r, 1'b1, 1'b0 }; |
| |
| reg [6:0] sel; |
| wire g_sel = g_extend[sel]; |
| |
| always @ (posedge clk) begin |
| g_r <= a; |
| sel <= a[6:0]; |
| q <= g_sel; |
| end |
| |
| endmodule |