1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
module test (
input EN, CLK,
input [3:0] D,
output reg [3:0] Q
);
always @(posedge CLK)
if (EN) Q <= D;
specify
if (EN) (CLK *> (Q : D)) = (1, 2:3:4);
$setup(D, posedge CLK &&& EN, 5);
$hold(posedge CLK, D &&& EN, 6);
endspecify
endmodule
module test2 (
input A, B,
output Q
);
xor (Q, A, B);
specify
//specparam T_rise = 1;
//specparam T_fall = 2;
`define T_rise 1
`define T_fall 2
(A => Q) = (`T_rise,`T_fall);
//(B => Q) = (`T_rise+`T_fall)/2.0;
(B => Q) = 1.5;
endspecify
endmodule
module issue01144(input clk, d, output q);
specify
// Fails:
(posedge clk => (q +: d)) = (3,1);
(/*posedge*/ clk => (q +: d)) = (3,1);
(posedge clk *> (q +: d)) = (3,1);
(/*posedge*/ clk *> (q +: d)) = (3,1);
// Works:
(/*posedge*/ clk => q) = (3,1);
(/*posedge*/ clk *> q) = (3,1);
endspecify
endmodule
|
