Module Definition
dashboard | hierarchy | modlist | groups | tests | asserts

Module : prim_mubi4_sync
SCORELINECONDTOGGLEFSMBRANCHASSERT
100.00 100.00 100.00 100.00 100.00

Source File(s) :
/workspaces/repo/scratch/os_regression/pwrmgr-sim-vcs/default/sim-vcs/../src/lowrisc_prim_mubi_0.1/rtl/prim_mubi4_sync.sv

Module self-instances :
NAMESCORELINECONDTOGGLEFSMBRANCHASSERT
tb.dut.u_cdc.u_sync_rom_ctrl 100.00 100.00 100.00 100.00 100.00


Module Instance : tb.dut.u_cdc.u_sync_rom_ctrl

Instance :
SCORELINECONDTOGGLEFSMBRANCHASSERT
100.00 100.00 100.00 100.00 100.00


Instance's subtree :
SCORELINECONDTOGGLEFSMBRANCHASSERT
100.00 100.00 100.00 100.00 100.00


Parent :
SCORELINECONDTOGGLEFSMBRANCHASSERTNAME
100.00 100.00 100.00 100.00 u_cdc


Subtrees :
NAMESCORELINECONDTOGGLEFSMBRANCHASSERT
gen_buffs[0].gen_bits[0].u_prim_buf 100.00 100.00
gen_buffs[0].gen_bits[1].u_prim_buf 100.00 100.00
gen_buffs[0].gen_bits[2].u_prim_buf 100.00 100.00
gen_buffs[0].gen_bits[3].u_prim_buf 100.00 100.00
gen_flops.gen_stable_chks.gen_bufs_muxes[0].u_sig_unstable_buf 100.00 100.00
gen_flops.gen_stable_chks.gen_bufs_muxes[1].u_sig_unstable_buf 100.00 100.00
gen_flops.gen_stable_chks.gen_bufs_muxes[2].u_sig_unstable_buf 100.00 100.00
gen_flops.gen_stable_chks.gen_bufs_muxes[3].u_sig_unstable_buf 100.00 100.00
gen_flops.gen_stable_chks.u_mubi_xor 100.00 100.00
gen_flops.gen_stable_chks.u_prim_flop_3rd_stage 100.00 100.00 100.00
gen_flops.u_prim_flop_2sync 100.00 100.00 100.00

Since this is the module's only instance, the coverage report is the same as for the module.
Line Coverage for Module : prim_mubi4_sync
Line No.TotalCoveredPercent
TOTAL66100.00
CONT_ASSIGN9611100.00
CONT_ASSIGN9611100.00
CONT_ASSIGN9611100.00
CONT_ASSIGN9611100.00
ALWAYS11711100.00
CONT_ASSIGN16811100.00


95                              // hence this mux can be implemented behaviorally.
96         4/4                  assign mubi[k] = (|sig_unstable_buf) ? reset_value[k] : mubi_q[k];
           Tests:       T1 T2 T3  | T1 T2 T3  | T1 T2 T3  | T1 T2 T3 
97                            end
98                      
99                      // Note regarding SVAs below:
100                     //
101                     // 1) Without the sampled rst_ni pre-condition, this may cause false assertion failures right after
102                     // a reset release, since the "disable iff" condition with the rst_ni is sampled in the "observed"
103                     // SV scheduler region after all assignments have been evaluated (see also LRM section 16.12, page
104                     // 423). This is a simulation artifact due to reset synchronization in RTL, which releases rst_ni
105                     // on the active clock edge. This causes the assertion to evaluate although the reset was actually
106                     // 0 when entering this simulation cycle.
107                     //
108                     // 2) Similarly to 1) there can be sampling mismatches of the lc_en_i signal since that signal may
109                     // originate from a different clock domain. I.e., in cases where the lc_en_i signal changes exactly
110                     // at the same time that the clk_i signal rises, the SVA will not pick up that change in that clock
111                     // cycle, whereas RTL will because SVAs sample values in the "preponed" region. To that end we make
112                     // use of an RTL helper variable to sample the lc_en_i signal, hence ensuring that there are no
113                     // sampling mismatches.
114                     `ifdef INC_ASSERT
115                           mubi4_t mubi_in_sva_q;
116                           always_ff @(posedge clk_i) begin
117        1/1                  mubi_in_sva_q <= mubi_i;
           Tests:       T1 T2 T3 
118                           end
119                           `ASSERT(OutputIfUnstable_A, sig_unstable |-> mubi_o == {NumCopies{reset_value}})
120                           `ASSERT(OutputDelay_A,
121                                   rst_ni |-> ##[3:4] sig_unstable || mubi_o == {NumCopies{$past(mubi_in_sva_q, 2)}})
122                     `endif
123                         end else begin : gen_no_stable_chks
124                           assign mubi = mubi_sync;
125                     `ifdef INC_ASSERT
126                           mubi4_t mubi_in_sva_q;
127                           always_ff @(posedge clk_i) begin
128                             mubi_in_sva_q <= mubi_i;
129                           end
130                           `ASSERT(OutputDelay_A,
131                                   rst_ni |-> ##3 (mubi_o == {NumCopies{$past(mubi_in_sva_q, 2)}} ||
132                                                   $past(mubi_in_sva_q, 2) != $past(mubi_in_sva_q, 1)))
133                     `endif
134                         end
135                       end else begin : gen_no_flops
136                     
137                         //VCS coverage off
138                         // pragma coverage off
139                     
140                         // This unused companion logic helps remove lint errors
141                         // for modules where clock and reset are used for assertions only
142                         // This logic will be removed for synthesis since it is unloaded.
143                         mubi4_t unused_logic;
144                         always_ff @(posedge clk_i or negedge rst_ni) begin
145                           if (!rst_ni) begin
146                              unused_logic <= MuBi4False;
147                           end else begin
148                              unused_logic <= mubi_i;
149                           end
150                         end
151                     
152                         //VCS coverage on
153                         // pragma coverage on
154                     
155                         assign mubi = MuBi4Width'(mubi_i);
156                     
157                         `ASSERT(OutputDelay_A, mubi_o == {NumCopies{mubi_i}})
158                       end
159                     
160                       for (genvar j = 0; j < NumCopies; j++) begin : gen_buffs
161                         logic [MuBi4Width-1:0] mubi_out;
162                         for (genvar k = 0; k < MuBi4Width; k++) begin : gen_bits
163                           prim_buf u_prim_buf (
164                             .in_i(mubi[k]),
165                             .out_o(mubi_out[k])
166                           );
167                         end
168        1/1              assign mubi_o[j] = mubi4_t'(mubi_out);
           Tests:       T1 T2 T3 
Cond Coverage for Module : prim_mubi4_sync
TotalCoveredPercent
Conditions88100.00
Logical88100.00
Non-Logical00
Event00

 LINE       96
 EXPRESSION (((|gen_flops.gen_stable_chks.gen_bufs_muxes[0].sig_unstable_buf)) ? gen_flops.gen_stable_chks.reset_value[0] : gen_flops.gen_stable_chks.mubi_q[0])
             --------------------------------1--------------------------------
-1-StatusTests
0CoveredT1,T2,T3
1CoveredT1,T2,T3 

 LINE       96
 EXPRESSION (((|gen_flops.gen_stable_chks.gen_bufs_muxes[1].sig_unstable_buf)) ? gen_flops.gen_stable_chks.reset_value[1] : gen_flops.gen_stable_chks.mubi_q[1])
             --------------------------------1--------------------------------
-1-StatusTests
0CoveredT1,T2,T3
1CoveredT1,T2,T3 

 LINE       96
 EXPRESSION (((|gen_flops.gen_stable_chks.gen_bufs_muxes[2].sig_unstable_buf)) ? gen_flops.gen_stable_chks.reset_value[2] : gen_flops.gen_stable_chks.mubi_q[2])
             --------------------------------1--------------------------------
-1-StatusTests
0CoveredT1,T2,T3
1CoveredT1,T2,T3 

 LINE       96
 EXPRESSION (((|gen_flops.gen_stable_chks.gen_bufs_muxes[3].sig_unstable_buf)) ? gen_flops.gen_stable_chks.reset_value[3] : gen_flops.gen_stable_chks.mubi_q[3])
             --------------------------------1--------------------------------
-1-StatusTests
0CoveredT1,T2,T3
1CoveredT1,T2,T3
Branch Coverage for Module : prim_mubi4_sync
Line No.TotalCoveredPercent
Branches 8 8 100.00
TERNARY 96 2 2 100.00
TERNARY 96 2 2 100.00
TERNARY 96 2 2 100.00
TERNARY 96 2 2 100.00 



96                 assign mubi[k] = (|sig_unstable_buf) ? reset_value[k] : mubi_q[k];
                                                        -1-  
                                                        ==>  
                                                        ==>

Branches:
-1-StatusTests
1 Covered T1,T2,T3
0 Covered T1,T2,T3 



96                 assign mubi[k] = (|sig_unstable_buf) ? reset_value[k] : mubi_q[k];
                                                        
           Warning: the following expressions can not be annotated
           -1- ((|gen_flops.gen_stable_chks.gen_bufs_muxes[1].sig_unstable_buf)) ? ...;

Branches:
-1-StatusTests
1 Covered T1,T2,T3
0 Covered T1,T2,T3 



96                 assign mubi[k] = (|sig_unstable_buf) ? reset_value[k] : mubi_q[k];
                                                        
           Warning: the following expressions can not be annotated
           -1- ((|gen_flops.gen_stable_chks.gen_bufs_muxes[2].sig_unstable_buf)) ? ...;

Branches:
-1-StatusTests
1 Covered T1,T2,T3
0 Covered T1,T2,T3 



96                 assign mubi[k] = (|sig_unstable_buf) ? reset_value[k] : mubi_q[k];
                                                        
           Warning: the following expressions can not be annotated
           -1- ((|gen_flops.gen_stable_chks.gen_bufs_muxes[3].sig_unstable_buf)) ? ...;

Branches:
-1-StatusTests
1 Covered T1,T2,T3
0 Covered T1,T2,T3

Assert Coverage for Module : prim_mubi4_sync
TotalAttemptedPercentSucceeded/MatchedPercent
Assertions 4 4 100.00 4 100.00
Cover properties 0 0 0
Cover sequences 0 0 0
Total 4 4 100.00 4 100.00



Assertion Details

NameAttemptsReal SuccessesFailuresIncomplete
NumCopiesMustBeGreaterZero_A 954 954 0 0
OutputsKnown_A 19915584 19390328 0 0
gen_flops.gen_stable_chks.OutputDelay_A 19915584 19369466 0 2562
gen_flops.gen_stable_chks.OutputIfUnstable_A 19915584 34890 0 0


NumCopiesMustBeGreaterZero_A
NameAttemptsReal SuccessesFailuresIncomplete
Total 954 954 0 0
T1 1 1 0 0
T2 1 1 0 0
T3 1 1 0 0
T4 1 1 0 0
T5 1 1 0 0
T6 1 1 0 0
T7 1 1 0 0
T8 1 1 0 0
T9 1 1 0 0
T10 1 1 0 0

OutputsKnown_A
NameAttemptsReal SuccessesFailuresIncomplete
Total 19915584 19390328 0 0
T1 2458 2379 0 0
T2 3451 3382 0 0
T3 1983 1932 0 0
T4 3429 3365 0 0
T5 7593 7515 0 0
T6 2288 2128 0 0
T7 3960 3880 0 0
T8 2262 2199 0 0
T9 5328 5229 0 0
T10 1299 986 0 0

gen_flops.gen_stable_chks.OutputDelay_A
NameAttemptsReal SuccessesFailuresIncomplete
Total 19915584 19369466 0 2562
T1 2458 2376 0 3
T2 3451 3379 0 3
T3 1983 1929 0 3
T4 3429 3362 0 3
T5 7593 7512 0 3
T6 2288 2122 0 3
T7 3960 3877 0 3
T8 2262 2196 0 3
T9 5328 5226 0 3
T10 1299 974 0 3

gen_flops.gen_stable_chks.OutputIfUnstable_A
NameAttemptsReal SuccessesFailuresIncomplete
Total 19915584 34890 0 0
T1 2458 1 0 0
T2 3451 1 0 0
T3 1983 1 0 0
T4 3429 1 0 0
T5 7593 53 0 0
T6 2288 2 0 0
T7 3960 1 0 0
T8 2262 1 0 0
T9 5328 1 0 0
T10 1299 4 0 0

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%