Line Coverage for Module :
prim_pulse_sync
| Line No. | Total | Covered | Percent |
|---|
| TOTAL | | 7 | 7 | 100.00 |
| ALWAYS | 31 | 3 | 3 | 100.00 |
| CONT_ASSIGN | 49 | 0 | 0 | |
| CONT_ASSIGN | 52 | 0 | 0 | |
| ALWAYS | 55 | 0 | 0 | |
| ALWAYS | 89 | 3 | 3 | 100.00 |
| CONT_ASSIGN | 97 | 1 | 1 | 100.00 |
30 always_ff @(posedge clk_src_i or negedge rst_src_ni) begin
31 1/1 if (!rst_src_ni) begin
Tests: T1 T2 T3
32 1/1 src_level <= 1'b0;
Tests: T1 T2 T3
33 end else begin
34 1/1 src_level <= src_level ^ src_pulse_i;
Tests: T1 T2 T3
35 end
36 end
37
38
39 // source active must come far enough such that the destination domain has time
40 // to create a valid pulse.
41 `ifdef INC_ASSERT
42 //VCS coverage off
43 // pragma coverage off
44
45 // source active flag tracks whether there is an ongoing "toggle" event.
46 // Until this toggle event is accepted by the destination domain (negative edge of
47 // of the pulse output), the source side cannot toggle again.
48 logic effective_rst_n;
49 unreachable assign effective_rst_n = rst_src_ni && dst_pulse_o;
50
51 logic src_active_flag_d, src_active_flag_q;
52 unreachable assign src_active_flag_d = src_pulse_i || src_active_flag_q;
53
54 always_ff @(posedge clk_src_i or negedge effective_rst_n) begin
55 unreachable if (!effective_rst_n) begin
56 unreachable src_active_flag_q <= '0;
57 end else begin
58 unreachable src_active_flag_q <= src_active_flag_d;
59 end
60 end
61
62 //VCS coverage on
63 // pragma coverage on
64
65 `ASSERT(SrcPulseCheck_M, src_pulse_i |-> !src_active_flag_q, clk_src_i, !rst_src_ni)
66 `endif
67
68 //////////////////////////////////////////////////////////
69 // synchronize level signal to destination clock domain //
70 //////////////////////////////////////////////////////////
71 logic dst_level;
72
73 prim_flop_2sync #(.Width(1)) prim_flop_2sync (
74 // source clock domain
75 .d_i (src_level),
76 // destination clock domain
77 .clk_i (clk_dst_i),
78 .rst_ni (rst_dst_ni),
79 .q_o (dst_level)
80 );
81
82 ////////////////////////////////////////
83 // convert level signal back to pulse //
84 ////////////////////////////////////////
85 logic dst_level_q;
86
87 // delay dst_level by 1 cycle
88 always_ff @(posedge clk_dst_i or negedge rst_dst_ni) begin
89 1/1 if (!rst_dst_ni) begin
Tests: T1 T2 T3
90 1/1 dst_level_q <= 1'b0;
Tests: T1 T2 T3
91 end else begin
92 1/1 dst_level_q <= dst_level;
Tests: T1 T2 T3
93 end
94 end
95
96 // edge detection
97 1/1 assign dst_pulse_o = dst_level_q ^ dst_level;
Tests: T2 T6 T13
Cond Coverage for Module :
prim_pulse_sync
| Total | Covered | Percent |
|---|
| Conditions | 8 | 8 | 100.00 |
| Logical | 8 | 8 | 100.00 |
| Non-Logical | 0 | 0 | |
| Event | 0 | 0 | |
LINE 34
EXPRESSION (src_level ^ src_pulse_i)
----1---- -----2-----
| -1- | -2- | Status | Tests |
|---|
| 0 | 0 | Covered | T1,T2,T3 |
| 0 | 1 | Covered | T2,T6,T13 |
| 1 | 0 | Covered | T2,T6,T13 |
| 1 | 1 | Covered | T2,T6,T13 |
LINE 97
EXPRESSION (dst_level_q ^ dst_level)
-----1----- ----2----
| -1- | -2- | Status | Tests |
|---|
| 0 | 0 | Covered | T1,T2,T3 |
| 0 | 1 | Covered | T2,T6,T13 |
| 1 | 0 | Covered | T2,T6,T13 |
| 1 | 1 | Covered | T2,T6,T13 |
Branch Coverage for Module :
prim_pulse_sync
| Line No. | Total | Covered | Percent |
| Branches |
|
4 |
4 |
100.00 |
| IF |
31 |
2 |
2 |
100.00 |
| IF |
89 |
2 |
2 |
100.00 |
31 if (!rst_src_ni) begin
-1-
32 src_level <= 1'b0;
==>
33 end else begin
34 src_level <= src_level ^ src_pulse_i;
==>
Branches:
| -1- | Status | Tests |
| 1 |
Covered |
T1,T2,T3 |
| 0 |
Covered |
T1,T2,T3 |
89 if (!rst_dst_ni) begin
-1-
90 dst_level_q <= 1'b0;
==>
91 end else begin
92 dst_level_q <= dst_level;
==>
Branches:
| -1- | Status | Tests |
| 1 |
Covered |
T1,T2,T3 |
| 0 |
Covered |
T1,T2,T3 |
Assert Coverage for Module :
prim_pulse_sync
Assertion Details
DstPulseCheck_A
| Name | Attempts | Real Successes | Failures | Incomplete |
| Total |
2147483647 |
12322 |
0 |
0 |
| T2 |
24920 |
2 |
0 |
0 |
| T3 |
14987 |
0 |
0 |
0 |
| T4 |
23863 |
0 |
0 |
0 |
| T5 |
27117 |
0 |
0 |
0 |
| T6 |
35452 |
5 |
0 |
0 |
| T7 |
20238 |
0 |
0 |
0 |
| T8 |
27702 |
0 |
0 |
0 |
| T9 |
572 |
0 |
0 |
0 |
| T10 |
21782 |
0 |
0 |
0 |
| T13 |
0 |
7 |
0 |
0 |
| T14 |
589 |
0 |
0 |
0 |
| T29 |
661 |
0 |
0 |
0 |
| T32 |
442 |
0 |
0 |
0 |
| T35 |
24433 |
0 |
0 |
0 |
| T51 |
112341 |
0 |
0 |
0 |
| T59 |
410860 |
4 |
0 |
0 |
| T70 |
0 |
2 |
0 |
0 |
| T71 |
0 |
4 |
0 |
0 |
| T72 |
178551 |
2 |
0 |
0 |
| T76 |
0 |
7 |
0 |
0 |
| T77 |
0 |
4 |
0 |
0 |
| T78 |
0 |
6 |
0 |
0 |
| T79 |
0 |
4 |
0 |
0 |
| T115 |
0 |
2 |
0 |
0 |
| T116 |
23083 |
0 |
0 |
0 |
| T174 |
0 |
6 |
0 |
0 |
| T180 |
439 |
0 |
0 |
0 |
| T197 |
270548 |
0 |
0 |
0 |
| T265 |
478 |
0 |
0 |
0 |
| T397 |
0 |
3 |
0 |
0 |
| T406 |
0 |
1 |
0 |
0 |
| T407 |
0 |
2 |
0 |
0 |
| T420 |
0 |
1 |
0 |
0 |
| T421 |
0 |
1 |
0 |
0 |
| T422 |
0 |
2 |
0 |
0 |
| T423 |
0 |
1 |
0 |
0 |
| T424 |
0 |
2 |
0 |
0 |
| T425 |
414 |
0 |
0 |
0 |
SrcPulseCheck_M
| Name | Attempts | Real Successes | Failures | Incomplete |
| Total |
2147483647 |
12340 |
0 |
0 |
| T2 |
24920 |
2 |
0 |
0 |
| T3 |
14987 |
0 |
0 |
0 |
| T4 |
23863 |
0 |
0 |
0 |
| T5 |
27117 |
0 |
0 |
0 |
| T6 |
69104 |
6 |
0 |
0 |
| T7 |
20238 |
0 |
0 |
0 |
| T8 |
27702 |
0 |
0 |
0 |
| T9 |
39771 |
0 |
0 |
0 |
| T10 |
42430 |
0 |
0 |
0 |
| T13 |
0 |
7 |
0 |
0 |
| T14 |
30680 |
0 |
0 |
0 |
| T29 |
53672 |
0 |
0 |
0 |
| T32 |
25072 |
0 |
0 |
0 |
| T35 |
24433 |
0 |
0 |
0 |
| T51 |
1013 |
0 |
0 |
0 |
| T59 |
3679 |
4 |
0 |
0 |
| T70 |
0 |
2 |
0 |
0 |
| T71 |
0 |
4 |
0 |
0 |
| T72 |
4184 |
2 |
0 |
0 |
| T76 |
0 |
8 |
0 |
0 |
| T77 |
0 |
5 |
0 |
0 |
| T78 |
0 |
7 |
0 |
0 |
| T79 |
0 |
4 |
0 |
0 |
| T115 |
0 |
2 |
0 |
0 |
| T116 |
44978 |
0 |
0 |
0 |
| T174 |
0 |
6 |
0 |
0 |
| T180 |
21909 |
0 |
0 |
0 |
| T197 |
4400 |
0 |
0 |
0 |
| T265 |
30968 |
0 |
0 |
0 |
| T397 |
0 |
3 |
0 |
0 |
| T406 |
0 |
1 |
0 |
0 |
| T407 |
0 |
2 |
0 |
0 |
| T420 |
0 |
1 |
0 |
0 |
| T421 |
0 |
1 |
0 |
0 |
| T422 |
0 |
2 |
0 |
0 |
| T423 |
0 |
1 |
0 |
0 |
| T424 |
0 |
2 |
0 |
0 |
| T425 |
25108 |
0 |
0 |
0 |