35 lines
551 B
Coq
35 lines
551 B
Coq
|
/*
|
||
|
|
* Based on Request id 1313366 in the iverilog Bugs database, or
|
||
|
|
* pr699 in the ivl-bugs database.
|
||
|
|
* Modified to force the comparison net.
|
||
|
|
*/
|
||
|
|
module bug;
|
||
|
|
|
||
|
|
wire a, b, c, d;
|
||
|
|
|
||
|
|
assign c = 1'b0;
|
||
|
|
assign a = 1'b1;
|
||
|
|
assign b = 1'b0;
|
||
|
|
|
||
|
|
assign d = c ? a : b;
|
||
|
|
|
||
|
|
initial
|
||
|
|
begin
|
||
|
|
force c = 1'b1;
|
||
|
|
#1 if (c !== 1'b1) begin
|
||
|
|
$display("FAILED -- b = %b", b);
|
||
|
|
$finish;
|
||
|
|
end
|
||
|
|
|
||
|
|
if (d !== 1'b1) begin
|
||
|
|
$display("FAILED -- d = %b", d);
|
||
|
|
$finish;
|
||
|
|
end
|
||
|
|
|
||
|
|
release c;
|
||
|
|
$display("PASSED");
|
||
|
|
$finish;
|
||
|
|
end
|
||
|
|
|
||
|
|
endmodule // bug
|