Unified Coverage Report :: Module :: prim_fifo_async_sram_adapter

Module : prim_fifo_async_sram_adapter

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
93.75	100.00	75.00			100.00	100.00

Source File(s) :
/workspaces/repo/scratch/os_regression_2024_08_31/spi_device_2p-sim-vcs/default/sim-vcs/../src/lowrisc_prim_fifo_0/rtl/prim_fifo_async_sram_adapter.sv

Module self-instances :

NAME	SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
tb.dut.u_upload.u_cmdfifo	93.75	100.00	75.00			100.00	100.00
tb.dut.u_upload.u_addrfifo	93.75	100.00	75.00			100.00	100.00

---

Module Instance : tb.dut.u_upload.u_cmdfifo

Instance :

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
93.75	100.00	75.00			100.00	100.00

Instance's subtree :

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
93.75	100.00	75.00			100.00	100.00

Parent :

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT	NAME
96.37	100.00	86.11		100.00	95.74	100.00	u_upload

Subtrees :

NAME	SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
u_sync_rptr_gray	100.00	100.00				100.00
u_sync_wptr_gray	100.00	100.00				100.00

---

Module Instance : tb.dut.u_upload.u_addrfifo

Instance :

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
93.75	100.00	75.00			100.00	100.00

Instance's subtree :

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
93.75	100.00	75.00			100.00	100.00

Parent :

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT	NAME
96.37	100.00	86.11		100.00	95.74	100.00	u_upload

Subtrees :

NAME	SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
u_sync_rptr_gray	100.00	100.00				100.00
u_sync_wptr_gray	100.00	100.00				100.00

Line Coverage for Module : prim_fifo_async_sram_adapter ( parameter Width=16,Depth=16,SramAw=10,SramDw=32,SramBaseAddr=960,DepthW=5,PtrVW=4,PtrW=5 )
Line Coverage for Module self-instances :

SCORE	LINE
93.75	100.00

tb.dut.u_upload.u_cmdfifo

	Line No.	Total	Covered	Percent
TOTAL		86	86	100.00
CONT_ASSIGN	121	1	1	100.00
CONT_ASSIGN	123	1	1	100.00
ALWAYS	126	6	6	100.00
CONT_ASSIGN	135	1	1	100.00
CONT_ASSIGN	136	1	1	100.00
CONT_ASSIGN	138	1	1	100.00
CONT_ASSIGN	149	1	1	100.00
CONT_ASSIGN	150	1	1	100.00
CONT_ASSIGN	151	1	1	100.00
CONT_ASSIGN	153	1	1	100.00
CONT_ASSIGN	163	1	1	100.00
CONT_ASSIGN	165	1	1	100.00
ALWAYS	168	6	6	100.00
CONT_ASSIGN	177	1	1	100.00
CONT_ASSIGN	178	1	1	100.00
CONT_ASSIGN	180	1	1	100.00
CONT_ASSIGN	191	1	1	100.00
CONT_ASSIGN	192	1	1	100.00
CONT_ASSIGN	193	1	1	100.00
CONT_ASSIGN	195	1	1	100.00
CONT_ASSIGN	201	1	1	100.00
ALWAYS	204	4	4	100.00
CONT_ASSIGN	211	1	1	100.00
CONT_ASSIGN	217	1	1	100.00
CONT_ASSIGN	218	1	1	100.00
CONT_ASSIGN	219	1	1	100.00
CONT_ASSIGN	222	1	1	100.00
CONT_ASSIGN	224	1	1	100.00
CONT_ASSIGN	225	1	1	100.00
CONT_ASSIGN	245	1	1	100.00
CONT_ASSIGN	247	1	1	100.00
CONT_ASSIGN	248	1	1	100.00
CONT_ASSIGN	251	1	1	100.00
CONT_ASSIGN	252	1	1	100.00
CONT_ASSIGN	254	1	1	100.00
CONT_ASSIGN	256	1	1	100.00
CONT_ASSIGN	260	1	1	100.00
ALWAYS	270	4	4	100.00
CONT_ASSIGN	291	1	1	100.00
CONT_ASSIGN	297	1	1	100.00
CONT_ASSIGN	299	1	1	100.00
CONT_ASSIGN	301	1	1	100.00
CONT_ASSIGN	304	1	1	100.00
CONT_ASSIGN	308	1	1	100.00
CONT_ASSIGN	321	1	1	100.00
ALWAYS	324	9	9	100.00
ROUTINE	347	7	7	100.00
ROUTINE	368	9	9	100.00

120                       // Begin: Write pointer sync to read clock ========================
121        1/1            assign w_wptr_inc = wvalid_i & wready_o;
           Tests:       T1 T2 T3 
122                     
123        1/1            assign w_wptr_d = w_wptr_q + PtrW'(1);
           Tests:       T1 T2 T3 
124                     
125                       always_ff @(posedge clk_wr_i or negedge rst_wr_ni) begin
126        1/1              if (!rst_wr_ni) begin
           Tests:       T1 T2 T3 
127        1/1                w_wptr_q      <= PtrW'(0);
           Tests:       T1 T2 T3 
128        1/1                w_wptr_gray_q <= PtrW'(0);
           Tests:       T1 T2 T3 
129        1/1              end else if (w_wptr_inc) begin
           Tests:       T4 T8 T10 
130        1/1                w_wptr_q      <= w_wptr_d;
           Tests:       T65 T51 T68 
131        1/1                w_wptr_gray_q <= w_wptr_gray_d;
           Tests:       T65 T51 T68 
132                         end
                        MISSING_ELSE
133                       end
134                     
135        1/1            assign w_wptr_v = w_wptr_q[0+:PtrVW];
           Tests:       T1 T2 T3 
136        1/1            assign w_wptr_p = w_wptr_q[PtrW-1];
           Tests:       T1 T2 T3 
137                     
138        1/1            assign w_wptr_gray_d = dec2gray(w_wptr_d);
           Tests:       T1 T2 T3 
139                     
140                       prim_flop_2sync #(
141                         .Width (PtrW)
142                       ) u_sync_wptr_gray (
143                         .clk_i  (clk_rd_i),
144                         .rst_ni (rst_rd_ni),
145                         .d_i    (w_wptr_gray_q),
146                         .q_o    (r_wptr_gray)
147                       );
148                     
149        1/1            assign r_wptr   = gray2dec(r_wptr_gray);
           Tests:       T1 T2 T3 
150        1/1            assign r_wptr_p = r_wptr[PtrW-1];
           Tests:       T1 T2 T3 
151        1/1            assign r_wptr_v = r_wptr[0+:PtrVW];
           Tests:       T1 T2 T3 
152                     
153        1/1            assign wdepth_o = (w_wptr_p == w_rptr_p)
           Tests:       T1 T2 T3 
154                                       ? DepthW'(w_wptr_v - w_rptr_v)
155                                       : DepthW'({1'b1, w_wptr_v} - {1'b 0, w_rptr_v});
156                       // End:   Write pointer sync to read clock ------------------------
157                     
158                       // Begin: Read pointer sync to write clock ========================
159                       //assign r_rptr_inc = rvalid_o & rready_i;
160                       //assign r_rptr_inc = r_sram_req_o && r_sram_gnt_i;
161                       // Increase the read pointer (crossing the clock domain) only when the
162                       // reader acked.
163        1/1            assign r_rptr_inc = rfifo_ack;
           Tests:       T65 T51 T68 
164                     
165        1/1            assign r_rptr_d = r_rptr_q + PtrW'(1);
           Tests:       T1 T2 T3 
166                     
167                       always_ff @(posedge clk_rd_i or negedge rst_rd_ni) begin
168        1/1              if (!rst_rd_ni) begin
           Tests:       T1 T2 T3 
169        1/1                r_rptr_q      <= PtrW'(0);
           Tests:       T1 T2 T3 
170        1/1                r_rptr_gray_q <= PtrW'(0);
           Tests:       T1 T2 T3 
171        1/1              end else if (r_rptr_inc) begin
           Tests:       T1 T2 T3 
172        1/1                r_rptr_q      <= r_rptr_d;
           Tests:       T65 T51 T68 
173        1/1                r_rptr_gray_q <= r_rptr_gray_d;
           Tests:       T65 T51 T68 
174                         end
                        MISSING_ELSE
175                       end
176                     
177        1/1            assign r_rptr_v = r_rptr_q[0+:PtrVW];
           Tests:       T1 T2 T3 
178        1/1            assign r_rptr_p = r_rptr_q[PtrW-1];
           Tests:       T1 T2 T3 
179                     
180        1/1            assign r_rptr_gray_d = dec2gray(r_rptr_d);
           Tests:       T1 T2 T3 
181                     
182                       prim_flop_2sync #(
183                         .Width (PtrW)
184                       ) u_sync_rptr_gray (
185                         .clk_i  (clk_wr_i),
186                         .rst_ni (rst_wr_ni),
187                         .d_i    (r_rptr_gray_q),
188                         .q_o    (w_rptr_gray)
189                       );
190                     
191        1/1            assign w_rptr = gray2dec(w_rptr_gray);
           Tests:       T1 T2 T3 
192        1/1            assign w_rptr_p = w_rptr[PtrW-1];
           Tests:       T1 T2 T3 
193        1/1            assign w_rptr_v = w_rptr[0+:PtrVW];
           Tests:       T1 T2 T3 
194                     
195        1/1            assign rdepth_o = (r_wptr_p == r_rptr_p)
           Tests:       T1 T2 T3 
196                                       ? DepthW'(r_wptr_v - r_rptr_v)
197                                       : DepthW'({1'b1, r_wptr_v} - {1'b 0, r_rptr_v});
198                       // End:   Read pointer sync to write clock ------------------------
199                     
200                       // Begin: SRAM Read pointer
201        1/1            assign r_sram_rptr_inc = rsram_ack;
           Tests:       T1 T2 T3 
202                     
203                       always_ff @(posedge clk_rd_i or negedge rst_rd_ni) begin
204        1/1              if (!rst_rd_ni) begin
           Tests:       T1 T2 T3 
205        1/1                r_sram_rptr <= PtrW'(0);
           Tests:       T1 T2 T3 
206        1/1              end else if (r_sram_rptr_inc) begin
           Tests:       T1 T2 T3 
207        1/1                r_sram_rptr <= r_sram_rptr + PtrW'(1);
           Tests:       T65 T51 T68 
208                         end
                        MISSING_ELSE
209                       end
210                     
211        1/1            assign r_sramrptr_empty = (r_wptr == r_sram_rptr);
           Tests:       T1 T2 T3 
212                       // End:   SRAM Read pointer
213                     
214                       // Full/ Empty
215                       // Lint complains PtrW'(1) << (PtrW-1). So changed as below
216                       localparam logic [PtrW-1:0] XorMask = {1'b 1, {PtrW-1{1'b0}}};
217        1/1            assign w_full  = (w_wptr_q == (w_rptr   ^ XorMask));
           Tests:       T1 T2 T3 
218        1/1            assign r_full  = (r_wptr   == (r_rptr_q ^ XorMask));
           Tests:       T1 T2 T3 
219        1/1            assign r_empty = (r_wptr   == r_rptr_q);
           Tests:       T1 T2 T3 
220                     
221                       logic  unused_r_empty;
222        1/1            assign unused_r_empty = r_empty;
           Tests:       T1 T2 T3 
223                     
224        1/1            assign r_full_o     = r_full;
           Tests:       T1 T2 T3 
225        1/1            assign w_full_o     = w_full;
           Tests:       T1 T2 T3 
226                     
227                       // The notempty status !(wptr == rptr) assert one clock earlier than the
228                       // actual `rvalid` signals.
229                       //
230                       // The reason is due to the SRAM read latency. The module uses SRAM FIFO
231                       // interface. When the logic in producer domain pushes entries, the pointer
232                       // is increased. This triggers the FIFO logic in the consumer clock domain
233                       // fetches data from SRAM.
234                       //
235                       // The pointer crosses the clock boundary. It takes usually two cycles (in
236                       // the consumer side). Then, as the read and write pointer in the read clock
237                       // domain has a gap by 1, the FIFO not empty status is raised.
238                       //
239                       // At this time, the logic just sent the read request to the SRAM. The data
240                       // is not yet read. The `rvalid` asserts when it receives data from the
241                       // SRAM.
242                       //
243                       // So, if the consumer reads data at the same cycle when notempty status is
244                       // raised, it reads incorrect data.
245        1/1            assign r_notempty_o = rvalid_o;
           Tests:       T1 T2 T3 
246                     
247        1/1            assign rsram_ack = r_sram_req_o && r_sram_gnt_i;
           Tests:       T1 T2 T3 
248        1/1            assign rfifo_ack = rvalid_o     && rready_i;
           Tests:       T1 T2 T3 
249                     
250                       // SRAM Write Request
251        1/1            assign w_sram_req_o   = wvalid_i && !w_full;
           Tests:       T1 T2 T3 
252        1/1            assign wready_o       = !w_full && w_sram_gnt_i;
           Tests:       T1 T2 T3 
253                       assign w_sram_write_o = 1'b 1; // Always write
254        1/1            assign w_sram_addr_o  = SramBaseAddr + SramAw'(w_wptr_v);
           Tests:       T1 T2 T3 
255                     
256        1/1            assign w_sram_wdata_o = SramDw'(wdata_i);
           Tests:       T1 T2 T3 
257                       assign w_sram_wmask_o = SramDw'({Width{1'b1}});
258                     
259                       logic unused_w_sram;
260        1/1            assign unused_w_sram = ^{w_sram_rvalid_i, w_sram_rdata_i, w_sram_rerror_i};
           Tests:       T1 T2 T3 
261                     
262                       // SRAM Read Request
263                       // Request Scenario (!r_empty):
264                       //  - storage empty: Send request if
265                       //               !r_sram_rvalid_i || (rfifo_ack && r_sram_rvalid_i);
266                       //  - storage !empty: depends on the rfifo_ack:
267                       //    - r_rptr_inc: Can request more
268                       //    - !r_rptr_inc: Can't request
269                       always_comb begin : r_sram_req
270        1/1              r_sram_req_o = 1'b 0;
           Tests:       T1 T2 T3 
271                         // Karnough Map (!empty): sram_req
272                         // {sram_rv, rfifo_ack} | 00 | 01          | 11 | 10
273                         // ----------------------------------------------------------
274                         // stored          | 0  |  1 |  impossible |  1 |  0
275                         //                 | 1  |  0 |  1          |  X |  impossible
276                         //
277                         // req_o = r_ptr_inc || (!stored && !r_sram_rvalid_i)
278                     
279        1/1              if (stored) begin
           Tests:       T1 T2 T3 
280                           // storage has data. depends on rfifo_ack
281                           // rfifo_ack can be replaced to rready_i as `rvalid_o` is 1
282        1/1                r_sram_req_o = !r_sramrptr_empty && rfifo_ack;
           Tests:       T65 T51 T68 
283                         end else begin
284                           // storage has no data.
285                           // Can send request only when the reader accept the request or no
286                           // previous request sent out.
287        1/1                r_sram_req_o = !r_sramrptr_empty && !(r_sram_rvalid_i ^ rfifo_ack);
           Tests:       T1 T2 T3 
288                         end
289                       end : r_sram_req
290                     
291        1/1            assign rvalid_o       = stored || r_sram_rvalid_i;
           Tests:       T1 T2 T3 
292                       assign r_sram_write_o = 1'b 0; // always read
293                       assign r_sram_wdata_o = '0;
294                       assign r_sram_wmask_o = '0;
295                     
296                       // Send SRAM request with sram read pointer.
297        1/1            assign r_sram_addr_o  = SramBaseAddr + SramAw'(r_sram_rptr[0+:PtrVW]);
           Tests:       T1 T2 T3 
298                     
299        1/1            assign rdata_d = (r_sram_rvalid_i) ? r_sram_rdata_i[0+:Width] : Width'(0);
           Tests:       T1 T2 T3 
300                     
301        1/1            assign rdata_o = (stored) ? rdata_q : rdata_d;
           Tests:       T1 T2 T3 
302                     
303                       logic unused_rsram;
304        1/1            assign unused_rsram = ^{r_sram_rerror_i};
           Tests:       T1 T2 T3 
305                     
306                       if (Width < SramDw) begin : g_unused_rdata
307                         logic unused_rdata;
308        1/1              assign unused_rdata = ^r_sram_rdata_i[SramDw-1:Width];
           Tests:       T2 T9 T10 
309                       end : g_unused_rdata
310                     
311                       // read clock domain rdata storage
312                       logic store_en;
313                     
314                       // Karnough Map (r_sram_rvalid_i):
315                       // rfifo_ack   | 0 | 1 |
316                       // ---------------------
317                       // stored    0 | 1 | 0 |
318                       //           1 | 0 | 1 |
319                       //
320                       // stored = s.r.v && XNOR(stored, rptr_inc)
321        1/1            assign store_en = r_sram_rvalid_i && !(stored ^ rfifo_ack);
           Tests:       T1 T2 T3 
322                     
323                       always_ff @(posedge clk_rd_i or negedge rst_rd_ni) begin
324        1/1              if (!rst_rd_ni) begin
           Tests:       T1 T2 T3 
325        1/1                stored <= 1'b 0;
           Tests:       T1 T2 T3 
326        1/1                rdata_q <= Width'(0);
           Tests:       T1 T2 T3 
327        1/1              end else if (store_en) begin
           Tests:       T1 T2 T3 
328        1/1                stored <= 1'b 1;
           Tests:       T65 T51 T68 
329        1/1                rdata_q <= rdata_d;
           Tests:       T65 T51 T68 
330        1/1              end else if (!r_sram_rvalid_i && rfifo_ack) begin
           Tests:       T1 T2 T3 
331                           // No request sent, host reads the data
332        1/1                stored <= 1'b 0;
           Tests:       T65 T51 T68 
333        1/1                rdata_q <= Width'(0);
           Tests:       T65 T51 T68 
334                         end
                        MISSING_ELSE
335                       end
336                     
337                       //////////////
338                       // Function //
339                       //////////////
340                     
341                       // dec2gray / gray2dec copied from prim_fifo_async.sv
342                       function automatic [PtrW-1:0] dec2gray(input logic [PtrW-1:0] decval);
343                         logic [PtrW-1:0] decval_sub;
344                         logic [PtrW-1:0] decval_in;
345                         logic            unused_decval_msb;
346                     
347        1/1              decval_sub = (PtrW)'(Depth) - {1'b0, decval[PtrW-2:0]} - 1'b1;
           Tests:       T1 T2 T3 
348                     
349        1/1              decval_in = decval[PtrW-1] ? decval_sub : decval;
           Tests:       T1 T2 T3 
350                     
351                         // We do not care about the MSB, hence we mask it out
352        1/1              unused_decval_msb = decval_in[PtrW-1];
           Tests:       T1 T2 T3 
353        1/1              decval_in[PtrW-1] = 1'b0;
           Tests:       T1 T2 T3 
354                     
355                         // Perform the XOR conversion
356        1/1              dec2gray = decval_in;
           Tests:       T1 T2 T3 
357        1/1              dec2gray ^= (decval_in >> 1);
           Tests:       T1 T2 T3 
358                     
359                         // Override the MSB
360        1/1              dec2gray[PtrW-1] = decval[PtrW-1];
           Tests:       T1 T2 T3 
361                       endfunction
362                     
363                       // Algorithm walks up from 0..N-1 then flips the upper bit and walks down from N-1 to 0.
364                       function automatic [PtrW-1:0] gray2dec(input logic [PtrW-1:0] grayval);
365                         logic [PtrW-1:0] dec_tmp, dec_tmp_sub;
366                         logic            unused_decsub_msb;
367                     
368        1/1              dec_tmp = '0;
           Tests:       T1 T2 T3 
369        1/1              for (int i = PtrW-2; i >= 0; i--) begin
           Tests:       T1 T2 T3 
370        1/1                dec_tmp[i] = dec_tmp[i+1] ^ grayval[i];
           Tests:       T1 T2 T3 
371                         end
372        1/1              dec_tmp_sub = (PtrW)'(Depth) - dec_tmp - 1'b1;
           Tests:       T1 T2 T3 
373        1/1              if (grayval[PtrW-1]) begin
           Tests:       T1 T2 T3 
374        1/1                gray2dec = dec_tmp_sub;
           Tests:       T49 T35 T50 
375                           // Override MSB
376        1/1                gray2dec[PtrW-1] = 1'b1;
           Tests:       T49 T35 T50 
377        1/1                unused_decsub_msb = dec_tmp_sub[PtrW-1];
           Tests:       T49 T35 T50 
378                         end else begin
379        1/1                gray2dec = dec_tmp;
           Tests:       T1 T2 T3 

---

Line Coverage for Module : prim_fifo_async_sram_adapter ( parameter Width=32,Depth=16,SramAw=10,SramDw=32,SramBaseAddr=976,DepthW=5,PtrVW=4,PtrW=5 )
Line Coverage for Module self-instances :

SCORE	LINE
93.75	100.00

tb.dut.u_upload.u_addrfifo

	Line No.	Total	Covered	Percent
TOTAL		85	85	100.00
CONT_ASSIGN	121	1	1	100.00
CONT_ASSIGN	123	1	1	100.00
ALWAYS	126	6	6	100.00
CONT_ASSIGN	135	1	1	100.00
CONT_ASSIGN	136	1	1	100.00
CONT_ASSIGN	138	1	1	100.00
CONT_ASSIGN	149	1	1	100.00
CONT_ASSIGN	150	1	1	100.00
CONT_ASSIGN	151	1	1	100.00
CONT_ASSIGN	153	1	1	100.00
CONT_ASSIGN	163	1	1	100.00
CONT_ASSIGN	165	1	1	100.00
ALWAYS	168	6	6	100.00
CONT_ASSIGN	177	1	1	100.00
CONT_ASSIGN	178	1	1	100.00
CONT_ASSIGN	180	1	1	100.00
CONT_ASSIGN	191	1	1	100.00
CONT_ASSIGN	192	1	1	100.00
CONT_ASSIGN	193	1	1	100.00
CONT_ASSIGN	195	1	1	100.00
CONT_ASSIGN	201	1	1	100.00
ALWAYS	204	4	4	100.00
CONT_ASSIGN	211	1	1	100.00
CONT_ASSIGN	217	1	1	100.00
CONT_ASSIGN	218	1	1	100.00
CONT_ASSIGN	219	1	1	100.00
CONT_ASSIGN	222	1	1	100.00
CONT_ASSIGN	224	1	1	100.00
CONT_ASSIGN	225	1	1	100.00
CONT_ASSIGN	245	1	1	100.00
CONT_ASSIGN	247	1	1	100.00
CONT_ASSIGN	248	1	1	100.00
CONT_ASSIGN	251	1	1	100.00
CONT_ASSIGN	252	1	1	100.00
CONT_ASSIGN	254	1	1	100.00
CONT_ASSIGN	256	1	1	100.00
CONT_ASSIGN	260	1	1	100.00
ALWAYS	270	4	4	100.00
CONT_ASSIGN	291	1	1	100.00
CONT_ASSIGN	297	1	1	100.00
CONT_ASSIGN	299	1	1	100.00
CONT_ASSIGN	301	1	1	100.00
CONT_ASSIGN	304	1	1	100.00
CONT_ASSIGN	321	1	1	100.00
ALWAYS	324	9	9	100.00
ROUTINE	347	7	7	100.00
ROUTINE	368	9	9	100.00

120                       // Begin: Write pointer sync to read clock ========================
121        1/1            assign w_wptr_inc = wvalid_i & wready_o;
           Tests:       T1 T2 T3 
122                     
123        1/1            assign w_wptr_d = w_wptr_q + PtrW'(1);
           Tests:       T1 T2 T3 
124                     
125                       always_ff @(posedge clk_wr_i or negedge rst_wr_ni) begin
126        1/1              if (!rst_wr_ni) begin
           Tests:       T1 T2 T3 
127        1/1                w_wptr_q      <= PtrW'(0);
           Tests:       T1 T2 T3 
128        1/1                w_wptr_gray_q <= PtrW'(0);
           Tests:       T1 T2 T3 
129        1/1              end else if (w_wptr_inc) begin
           Tests:       T4 T8 T10 
130        1/1                w_wptr_q      <= w_wptr_d;
           Tests:       T65 T68 T52 
131        1/1                w_wptr_gray_q <= w_wptr_gray_d;
           Tests:       T65 T68 T52 
132                         end
                        MISSING_ELSE
133                       end
134                     
135        1/1            assign w_wptr_v = w_wptr_q[0+:PtrVW];
           Tests:       T1 T2 T3 
136        1/1            assign w_wptr_p = w_wptr_q[PtrW-1];
           Tests:       T1 T2 T3 
137                     
138        1/1            assign w_wptr_gray_d = dec2gray(w_wptr_d);
           Tests:       T1 T2 T3 
139                     
140                       prim_flop_2sync #(
141                         .Width (PtrW)
142                       ) u_sync_wptr_gray (
143                         .clk_i  (clk_rd_i),
144                         .rst_ni (rst_rd_ni),
145                         .d_i    (w_wptr_gray_q),
146                         .q_o    (r_wptr_gray)
147                       );
148                     
149        1/1            assign r_wptr   = gray2dec(r_wptr_gray);
           Tests:       T1 T2 T3 
150        1/1            assign r_wptr_p = r_wptr[PtrW-1];
           Tests:       T1 T2 T3 
151        1/1            assign r_wptr_v = r_wptr[0+:PtrVW];
           Tests:       T1 T2 T3 
152                     
153        1/1            assign wdepth_o = (w_wptr_p == w_rptr_p)
           Tests:       T1 T2 T3 
154                                       ? DepthW'(w_wptr_v - w_rptr_v)
155                                       : DepthW'({1'b1, w_wptr_v} - {1'b 0, w_rptr_v});
156                       // End:   Write pointer sync to read clock ------------------------
157                     
158                       // Begin: Read pointer sync to write clock ========================
159                       //assign r_rptr_inc = rvalid_o & rready_i;
160                       //assign r_rptr_inc = r_sram_req_o && r_sram_gnt_i;
161                       // Increase the read pointer (crossing the clock domain) only when the
162                       // reader acked.
163        1/1            assign r_rptr_inc = rfifo_ack;
           Tests:       T65 T68 T52 
164                     
165        1/1            assign r_rptr_d = r_rptr_q + PtrW'(1);
           Tests:       T1 T2 T3 
166                     
167                       always_ff @(posedge clk_rd_i or negedge rst_rd_ni) begin
168        1/1              if (!rst_rd_ni) begin
           Tests:       T1 T2 T3 
169        1/1                r_rptr_q      <= PtrW'(0);
           Tests:       T1 T2 T3 
170        1/1                r_rptr_gray_q <= PtrW'(0);
           Tests:       T1 T2 T3 
171        1/1              end else if (r_rptr_inc) begin
           Tests:       T1 T2 T3 
172        1/1                r_rptr_q      <= r_rptr_d;
           Tests:       T65 T68 T52 
173        1/1                r_rptr_gray_q <= r_rptr_gray_d;
           Tests:       T65 T68 T52 
174                         end
                        MISSING_ELSE
175                       end
176                     
177        1/1            assign r_rptr_v = r_rptr_q[0+:PtrVW];
           Tests:       T1 T2 T3 
178        1/1            assign r_rptr_p = r_rptr_q[PtrW-1];
           Tests:       T1 T2 T3 
179                     
180        1/1            assign r_rptr_gray_d = dec2gray(r_rptr_d);
           Tests:       T1 T2 T3 
181                     
182                       prim_flop_2sync #(
183                         .Width (PtrW)
184                       ) u_sync_rptr_gray (
185                         .clk_i  (clk_wr_i),
186                         .rst_ni (rst_wr_ni),
187                         .d_i    (r_rptr_gray_q),
188                         .q_o    (w_rptr_gray)
189                       );
190                     
191        1/1            assign w_rptr = gray2dec(w_rptr_gray);
           Tests:       T1 T2 T3 
192        1/1            assign w_rptr_p = w_rptr[PtrW-1];
           Tests:       T1 T2 T3 
193        1/1            assign w_rptr_v = w_rptr[0+:PtrVW];
           Tests:       T1 T2 T3 
194                     
195        1/1            assign rdepth_o = (r_wptr_p == r_rptr_p)
           Tests:       T1 T2 T3 
196                                       ? DepthW'(r_wptr_v - r_rptr_v)
197                                       : DepthW'({1'b1, r_wptr_v} - {1'b 0, r_rptr_v});
198                       // End:   Read pointer sync to write clock ------------------------
199                     
200                       // Begin: SRAM Read pointer
201        1/1            assign r_sram_rptr_inc = rsram_ack;
           Tests:       T1 T2 T3 
202                     
203                       always_ff @(posedge clk_rd_i or negedge rst_rd_ni) begin
204        1/1              if (!rst_rd_ni) begin
           Tests:       T1 T2 T3 
205        1/1                r_sram_rptr <= PtrW'(0);
           Tests:       T1 T2 T3 
206        1/1              end else if (r_sram_rptr_inc) begin
           Tests:       T1 T2 T3 
207        1/1                r_sram_rptr <= r_sram_rptr + PtrW'(1);
           Tests:       T65 T68 T52 
208                         end
                        MISSING_ELSE
209                       end
210                     
211        1/1            assign r_sramrptr_empty = (r_wptr == r_sram_rptr);
           Tests:       T1 T2 T3 
212                       // End:   SRAM Read pointer
213                     
214                       // Full/ Empty
215                       // Lint complains PtrW'(1) << (PtrW-1). So changed as below
216                       localparam logic [PtrW-1:0] XorMask = {1'b 1, {PtrW-1{1'b0}}};
217        1/1            assign w_full  = (w_wptr_q == (w_rptr   ^ XorMask));
           Tests:       T1 T2 T3 
218        1/1            assign r_full  = (r_wptr   == (r_rptr_q ^ XorMask));
           Tests:       T1 T2 T3 
219        1/1            assign r_empty = (r_wptr   == r_rptr_q);
           Tests:       T1 T2 T3 
220                     
221                       logic  unused_r_empty;
222        1/1            assign unused_r_empty = r_empty;
           Tests:       T1 T2 T3 
223                     
224        1/1            assign r_full_o     = r_full;
           Tests:       T1 T2 T3 
225        1/1            assign w_full_o     = w_full;
           Tests:       T1 T2 T3 
226                     
227                       // The notempty status !(wptr == rptr) assert one clock earlier than the
228                       // actual `rvalid` signals.
229                       //
230                       // The reason is due to the SRAM read latency. The module uses SRAM FIFO
231                       // interface. When the logic in producer domain pushes entries, the pointer
232                       // is increased. This triggers the FIFO logic in the consumer clock domain
233                       // fetches data from SRAM.
234                       //
235                       // The pointer crosses the clock boundary. It takes usually two cycles (in
236                       // the consumer side). Then, as the read and write pointer in the read clock
237                       // domain has a gap by 1, the FIFO not empty status is raised.
238                       //
239                       // At this time, the logic just sent the read request to the SRAM. The data
240                       // is not yet read. The `rvalid` asserts when it receives data from the
241                       // SRAM.
242                       //
243                       // So, if the consumer reads data at the same cycle when notempty status is
244                       // raised, it reads incorrect data.
245        1/1            assign r_notempty_o = rvalid_o;
           Tests:       T1 T2 T3 
246                     
247        1/1            assign rsram_ack = r_sram_req_o && r_sram_gnt_i;
           Tests:       T1 T2 T3 
248        1/1            assign rfifo_ack = rvalid_o     && rready_i;
           Tests:       T1 T2 T3 
249                     
250                       // SRAM Write Request
251        1/1            assign w_sram_req_o   = wvalid_i && !w_full;
           Tests:       T1 T2 T3 
252        1/1            assign wready_o       = !w_full && w_sram_gnt_i;
           Tests:       T1 T2 T3 
253                       assign w_sram_write_o = 1'b 1; // Always write
254        1/1            assign w_sram_addr_o  = SramBaseAddr + SramAw'(w_wptr_v);
           Tests:       T1 T2 T3 
255                     
256        1/1            assign w_sram_wdata_o = SramDw'(wdata_i);
           Tests:       T1 T2 T3 
257                       assign w_sram_wmask_o = SramDw'({Width{1'b1}});
258                     
259                       logic unused_w_sram;
260        1/1            assign unused_w_sram = ^{w_sram_rvalid_i, w_sram_rdata_i, w_sram_rerror_i};
           Tests:       T1 T2 T3 
261                     
262                       // SRAM Read Request
263                       // Request Scenario (!r_empty):
264                       //  - storage empty: Send request if
265                       //               !r_sram_rvalid_i || (rfifo_ack && r_sram_rvalid_i);
266                       //  - storage !empty: depends on the rfifo_ack:
267                       //    - r_rptr_inc: Can request more
268                       //    - !r_rptr_inc: Can't request
269                       always_comb begin : r_sram_req
270        1/1              r_sram_req_o = 1'b 0;
           Tests:       T1 T2 T3 
271                         // Karnough Map (!empty): sram_req
272                         // {sram_rv, rfifo_ack} | 00 | 01          | 11 | 10
273                         // ----------------------------------------------------------
274                         // stored          | 0  |  1 |  impossible |  1 |  0
275                         //                 | 1  |  0 |  1          |  X |  impossible
276                         //
277                         // req_o = r_ptr_inc || (!stored && !r_sram_rvalid_i)
278                     
279        1/1              if (stored) begin
           Tests:       T1 T2 T3 
280                           // storage has data. depends on rfifo_ack
281                           // rfifo_ack can be replaced to rready_i as `rvalid_o` is 1
282        1/1                r_sram_req_o = !r_sramrptr_empty && rfifo_ack;
           Tests:       T65 T68 T52 
283                         end else begin
284                           // storage has no data.
285                           // Can send request only when the reader accept the request or no
286                           // previous request sent out.
287        1/1                r_sram_req_o = !r_sramrptr_empty && !(r_sram_rvalid_i ^ rfifo_ack);
           Tests:       T1 T2 T3 
288                         end
289                       end : r_sram_req
290                     
291        1/1            assign rvalid_o       = stored || r_sram_rvalid_i;
           Tests:       T1 T2 T3 
292                       assign r_sram_write_o = 1'b 0; // always read
293                       assign r_sram_wdata_o = '0;
294                       assign r_sram_wmask_o = '0;
295                     
296                       // Send SRAM request with sram read pointer.
297        1/1            assign r_sram_addr_o  = SramBaseAddr + SramAw'(r_sram_rptr[0+:PtrVW]);
           Tests:       T1 T2 T3 
298                     
299        1/1            assign rdata_d = (r_sram_rvalid_i) ? r_sram_rdata_i[0+:Width] : Width'(0);
           Tests:       T1 T2 T3 
300                     
301        1/1            assign rdata_o = (stored) ? rdata_q : rdata_d;
           Tests:       T1 T2 T3 
302                     
303                       logic unused_rsram;
304        1/1            assign unused_rsram = ^{r_sram_rerror_i};
           Tests:       T1 T2 T3 
305                     
306                       if (Width < SramDw) begin : g_unused_rdata
307                         logic unused_rdata;
308                         assign unused_rdata = ^r_sram_rdata_i[SramDw-1:Width];
309                       end : g_unused_rdata
310                     
311                       // read clock domain rdata storage
312                       logic store_en;
313                     
314                       // Karnough Map (r_sram_rvalid_i):
315                       // rfifo_ack   | 0 | 1 |
316                       // ---------------------
317                       // stored    0 | 1 | 0 |
318                       //           1 | 0 | 1 |
319                       //
320                       // stored = s.r.v && XNOR(stored, rptr_inc)
321        1/1            assign store_en = r_sram_rvalid_i && !(stored ^ rfifo_ack);
           Tests:       T1 T2 T3 
322                     
323                       always_ff @(posedge clk_rd_i or negedge rst_rd_ni) begin
324        1/1              if (!rst_rd_ni) begin
           Tests:       T1 T2 T3 
325        1/1                stored <= 1'b 0;
           Tests:       T1 T2 T3 
326        1/1                rdata_q <= Width'(0);
           Tests:       T1 T2 T3 
327        1/1              end else if (store_en) begin
           Tests:       T1 T2 T3 
328        1/1                stored <= 1'b 1;
           Tests:       T65 T68 T52 
329        1/1                rdata_q <= rdata_d;
           Tests:       T65 T68 T52 
330        1/1              end else if (!r_sram_rvalid_i && rfifo_ack) begin
           Tests:       T1 T2 T3 
331                           // No request sent, host reads the data
332        1/1                stored <= 1'b 0;
           Tests:       T65 T68 T52 
333        1/1                rdata_q <= Width'(0);
           Tests:       T65 T68 T52 
334                         end
                        MISSING_ELSE
335                       end
336                     
337                       //////////////
338                       // Function //
339                       //////////////
340                     
341                       // dec2gray / gray2dec copied from prim_fifo_async.sv
342                       function automatic [PtrW-1:0] dec2gray(input logic [PtrW-1:0] decval);
343                         logic [PtrW-1:0] decval_sub;
344                         logic [PtrW-1:0] decval_in;
345                         logic            unused_decval_msb;
346                     
347        1/1              decval_sub = (PtrW)'(Depth) - {1'b0, decval[PtrW-2:0]} - 1'b1;
           Tests:       T1 T2 T3 
348                     
349        1/1              decval_in = decval[PtrW-1] ? decval_sub : decval;
           Tests:       T1 T2 T3 
350                     
351                         // We do not care about the MSB, hence we mask it out
352        1/1              unused_decval_msb = decval_in[PtrW-1];
           Tests:       T1 T2 T3 
353        1/1              decval_in[PtrW-1] = 1'b0;
           Tests:       T1 T2 T3 
354                     
355                         // Perform the XOR conversion
356        1/1              dec2gray = decval_in;
           Tests:       T1 T2 T3 
357        1/1              dec2gray ^= (decval_in >> 1);
           Tests:       T1 T2 T3 
358                     
359                         // Override the MSB
360        1/1              dec2gray[PtrW-1] = decval[PtrW-1];
           Tests:       T1 T2 T3 
361                       endfunction
362                     
363                       // Algorithm walks up from 0..N-1 then flips the upper bit and walks down from N-1 to 0.
364                       function automatic [PtrW-1:0] gray2dec(input logic [PtrW-1:0] grayval);
365                         logic [PtrW-1:0] dec_tmp, dec_tmp_sub;
366                         logic            unused_decsub_msb;
367                     
368        1/1              dec_tmp = '0;
           Tests:       T1 T2 T3 
369        1/1              for (int i = PtrW-2; i >= 0; i--) begin
           Tests:       T1 T2 T3 
370        1/1                dec_tmp[i] = dec_tmp[i+1] ^ grayval[i];
           Tests:       T1 T2 T3 
371                         end
372        1/1              dec_tmp_sub = (PtrW)'(Depth) - dec_tmp - 1'b1;
           Tests:       T1 T2 T3 
373        1/1              if (grayval[PtrW-1]) begin
           Tests:       T1 T2 T3 
374        1/1                gray2dec = dec_tmp_sub;
           Tests:       T35 T116 T117 
375                           // Override MSB
376        1/1                gray2dec[PtrW-1] = 1'b1;
           Tests:       T35 T116 T117 
377        1/1                unused_decsub_msb = dec_tmp_sub[PtrW-1];
           Tests:       T35 T116 T117 
378                         end else begin
379        1/1                gray2dec = dec_tmp;
           Tests:       T1 T2 T3 

---

Cond Coverage for Module : prim_fifo_async_sram_adapter ( parameter Width=16,Depth=16,SramAw=10,SramDw=32,SramBaseAddr=960,DepthW=5,PtrVW=4,PtrW=5 )
Cond Coverage for Module self-instances :

SCORE	COND
93.75	75.00

tb.dut.u_upload.u_cmdfifo

	Total	Covered	Percent
Conditions	68	51	75.00
Logical	68	51	75.00
Non-Logical	0	0
Event	0	0

 LINE       121
 EXPRESSION (wvalid_i & wready_o)
             ----1---   ----2---

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Not Covered
1	1	Covered	T65,T51,T68

 LINE       153
 EXPRESSION ((w_wptr_p == w_rptr_p) ? (5'((w_wptr_v - w_rptr_v))) : (5'(({1'b1, w_wptr_v} - {1'b0, w_rptr_v}))))
             -----------1----------

-1-	Status	Tests
0	Covered	T49,T35,T50
1	Covered	T1,T2,T3

 LINE       153
 SUB-EXPRESSION (w_wptr_p == w_rptr_p)
                -----------1----------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       195
 EXPRESSION ((r_wptr_p == r_rptr_p) ? (5'((r_wptr_v - r_rptr_v))) : (5'(({1'b1, r_wptr_v} - {1'b0, r_rptr_v}))))
             -----------1----------

-1-	Status	Tests
0	Covered	T49,T35,T50
1	Covered	T1,T2,T3

 LINE       195
 SUB-EXPRESSION (r_wptr_p == r_rptr_p)
                -----------1----------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       211
 EXPRESSION (r_wptr == r_sram_rptr)
            -----------1-----------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       217
 EXPRESSION (w_wptr_q == (w_rptr ^ XorMask))
            ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Not Covered

 LINE       218
 EXPRESSION (r_wptr == (r_rptr_q ^ XorMask))
            ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Not Covered

 LINE       219
 EXPRESSION (r_wptr == r_rptr_q)
            ----------1---------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       247
 EXPRESSION (r_sram_req_o && r_sram_gnt_i)
             ------1-----    ------2-----

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Not Covered
1	1	Covered	T65,T51,T68

 LINE       248
 EXPRESSION (rvalid_o && rready_i)
             ----1---    ----2---

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T65,T51,T68
1	1	Covered	T65,T51,T68

 LINE       251
 EXPRESSION (wvalid_i && ((!w_full)))
             ----1---    -----2-----

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Not Covered
1	1	Covered	T65,T51,T68

 LINE       252
 EXPRESSION (((!w_full)) && w_sram_gnt_i)
             -----1-----    ------2-----

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T1,T2,T3
1	1	Covered	T65,T51,T68

 LINE       282
 EXPRESSION (((!r_sramrptr_empty)) && rfifo_ack)
             ----------1----------    ----2----

-1-	-2-	Status	Tests
0	1	Covered	T65,T51,T68
1	0	Not Covered
1	1	Not Covered

 LINE       287
 EXPRESSION (((!r_sramrptr_empty)) && ( ! (r_sram_rvalid_i ^ rfifo_ack) ))
             ----------1----------    -----------------2-----------------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Not Covered
1	1	Covered	T65,T51,T68

 LINE       287
 SUB-EXPRESSION ( ! (r_sram_rvalid_i ^ rfifo_ack) )
                    --------------1--------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T65,T51,T68

 LINE       287
 SUB-EXPRESSION (r_sram_rvalid_i ^ rfifo_ack)
                 -------1-------   ----2----

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Not Covered
1	0	Covered	T65,T51,T68
1	1	Not Covered

 LINE       291
 EXPRESSION (stored || r_sram_rvalid_i)
             ---1--    -------2-------

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T65,T51,T68
1	0	Covered	T65,T51,T68

 LINE       299
 EXPRESSION (r_sram_rvalid_i ? r_sram_rdata_i[0+:Width] : (16'(0)))
             -------1-------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T65,T51,T68

 LINE       301
 EXPRESSION (stored ? rdata_q : rdata_d)
             ---1--

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T65,T51,T68

 LINE       321
 EXPRESSION (r_sram_rvalid_i && ( ! (stored ^ rfifo_ack) ))
             -------1-------    -------------2------------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Not Covered
1	1	Covered	T65,T51,T68

 LINE       321
 SUB-EXPRESSION ( ! (stored ^ rfifo_ack) )
                    ----------1---------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T65,T51,T68

 LINE       321
 SUB-EXPRESSION (stored ^ rfifo_ack)
                 ---1--   ----2----

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Not Covered
1	0	Covered	T65,T51,T68
1	1	Covered	T65,T51,T68

 LINE       330
 EXPRESSION (((!r_sram_rvalid_i)) && rfifo_ack)
             ----------1---------    ----2----

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T1,T2,T3
1	1	Covered	T65,T51,T68

 LINE       349
 EXPRESSION (decval[(PtrW - 1)] ? decval_sub : decval)
             ---------1--------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T49,T35,T50

 LINE       370
 EXPRESSION (dec_tmp[(i + 1)] ^ grayval[i])
             --------1-------   -----2----

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T65,T51,T68
1	0	Covered	T51,T52,T67
1	1	Covered	T65,T51,T68

---

Cond Coverage for Module : prim_fifo_async_sram_adapter ( parameter Width=32,Depth=16,SramAw=10,SramDw=32,SramBaseAddr=976,DepthW=5,PtrVW=4,PtrW=5 )
Cond Coverage for Module self-instances :

SCORE	COND
93.75	75.00

tb.dut.u_upload.u_addrfifo

	Total	Covered	Percent
Conditions	68	51	75.00
Logical	68	51	75.00
Non-Logical	0	0
Event	0	0

 LINE       121
 EXPRESSION (wvalid_i & wready_o)
             ----1---   ----2---

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Not Covered
1	1	Covered	T65,T68,T52

 LINE       153
 EXPRESSION ((w_wptr_p == w_rptr_p) ? (5'((w_wptr_v - w_rptr_v))) : (5'(({1'b1, w_wptr_v} - {1'b0, w_rptr_v}))))
             -----------1----------

-1-	Status	Tests
0	Covered	T35,T116,T117
1	Covered	T1,T2,T3

 LINE       153
 SUB-EXPRESSION (w_wptr_p == w_rptr_p)
                -----------1----------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       195
 EXPRESSION ((r_wptr_p == r_rptr_p) ? (5'((r_wptr_v - r_rptr_v))) : (5'(({1'b1, r_wptr_v} - {1'b0, r_rptr_v}))))
             -----------1----------

-1-	Status	Tests
0	Covered	T35,T116,T117
1	Covered	T1,T2,T3

 LINE       195
 SUB-EXPRESSION (r_wptr_p == r_rptr_p)
                -----------1----------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       211
 EXPRESSION (r_wptr == r_sram_rptr)
            -----------1-----------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       217
 EXPRESSION (w_wptr_q == (w_rptr ^ XorMask))
            ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Not Covered

 LINE       218
 EXPRESSION (r_wptr == (r_rptr_q ^ XorMask))
            ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Not Covered

 LINE       219
 EXPRESSION (r_wptr == r_rptr_q)
            ----------1---------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       247
 EXPRESSION (r_sram_req_o && r_sram_gnt_i)
             ------1-----    ------2-----

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Not Covered
1	1	Covered	T65,T68,T52

 LINE       248
 EXPRESSION (rvalid_o && rready_i)
             ----1---    ----2---

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T65,T68,T52
1	1	Covered	T65,T68,T52

 LINE       251
 EXPRESSION (wvalid_i && ((!w_full)))
             ----1---    -----2-----

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Not Covered
1	1	Covered	T65,T68,T52

 LINE       252
 EXPRESSION (((!w_full)) && w_sram_gnt_i)
             -----1-----    ------2-----

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T1,T2,T3
1	1	Covered	T65,T68,T52

 LINE       282
 EXPRESSION (((!r_sramrptr_empty)) && rfifo_ack)
             ----------1----------    ----2----

-1-	-2-	Status	Tests
0	1	Covered	T65,T68,T52
1	0	Not Covered
1	1	Not Covered

 LINE       287
 EXPRESSION (((!r_sramrptr_empty)) && ( ! (r_sram_rvalid_i ^ rfifo_ack) ))
             ----------1----------    -----------------2-----------------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Not Covered
1	1	Covered	T65,T68,T52

 LINE       287
 SUB-EXPRESSION ( ! (r_sram_rvalid_i ^ rfifo_ack) )
                    --------------1--------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T65,T68,T52

 LINE       287
 SUB-EXPRESSION (r_sram_rvalid_i ^ rfifo_ack)
                 -------1-------   ----2----

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Not Covered
1	0	Covered	T65,T68,T52
1	1	Not Covered

 LINE       291
 EXPRESSION (stored || r_sram_rvalid_i)
             ---1--    -------2-------

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T65,T68,T52
1	0	Covered	T65,T68,T52

 LINE       299
 EXPRESSION (r_sram_rvalid_i ? r_sram_rdata_i[0+:Width] : (32'(0)))
             -------1-------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T65,T68,T52

 LINE       301
 EXPRESSION (stored ? rdata_q : rdata_d)
             ---1--

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T65,T68,T52

 LINE       321
 EXPRESSION (r_sram_rvalid_i && ( ! (stored ^ rfifo_ack) ))
             -------1-------    -------------2------------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Not Covered
1	1	Covered	T65,T68,T52

 LINE       321
 SUB-EXPRESSION ( ! (stored ^ rfifo_ack) )
                    ----------1---------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T65,T68,T52

 LINE       321
 SUB-EXPRESSION (stored ^ rfifo_ack)
                 ---1--   ----2----

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Not Covered
1	0	Covered	T65,T68,T52
1	1	Covered	T65,T68,T52

 LINE       330
 EXPRESSION (((!r_sram_rvalid_i)) && rfifo_ack)
             ----------1---------    ----2----

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T1,T2,T3
1	1	Covered	T65,T68,T52

 LINE       349
 EXPRESSION (decval[(PtrW - 1)] ? decval_sub : decval)
             ---------1--------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T35,T116,T117

 LINE       370
 EXPRESSION (dec_tmp[(i + 1)] ^ grayval[i])
             --------1-------   -----2----

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T65,T68,T52
1	0	Covered	T52,T67,T53
1	1	Covered	T65,T68,T52

---

Branch Coverage for Module : prim_fifo_async_sram_adapter

	Line No.	Total	Covered	Percent
Branches		27	27	100.00
TERNARY	153	2	2	100.00
TERNARY	195	2	2	100.00
TERNARY	299	2	2	100.00
TERNARY	301	2	2	100.00
IF	126	3	3	100.00
IF	168	3	3	100.00
IF	204	3	3	100.00
IF	279	2	2	100.00
IF	324	4	4	100.00
TERNARY	349	2	2	100.00
IF	373	2	2	100.00

153          assign wdepth_o = (w_wptr_p == w_rptr_p)
                                                     
154                          ? DepthW'(w_wptr_v - w_rptr_v)
                             -1-  
                             ==>  
                             ==>  

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T49,T35,T50

195          assign rdepth_o = (r_wptr_p == r_rptr_p)
                                                     
196                          ? DepthW'(r_wptr_v - r_rptr_v)
                             -1-  
                             ==>  
                             ==>  

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T49,T35,T50

299          assign rdata_d = (r_sram_rvalid_i) ? r_sram_rdata_i[0+:Width] : Width'(0);
                                                -1-  
                                                ==>  
                                                ==>  

Branches:

-1-	Status	Tests
1	Covered	T65,T51,T68
0	Covered	T1,T2,T3

301          assign rdata_o = (stored) ? rdata_q : rdata_d;
                                       -1-  
                                       ==>  
                                       ==>  

Branches:

-1-	Status	Tests
1	Covered	T65,T51,T68
0	Covered	T1,T2,T3

126            if (!rst_wr_ni) begin
               -1-  
127              w_wptr_q      <= PtrW'(0);
                 ==>
128              w_wptr_gray_q <= PtrW'(0);
129            end else if (w_wptr_inc) begin
                        -2-  
130              w_wptr_q      <= w_wptr_d;
                 ==>
131              w_wptr_gray_q <= w_wptr_gray_d;
132            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T65,T51,T68
0	0	Covered	T4,T8,T10

168            if (!rst_rd_ni) begin
               -1-  
169              r_rptr_q      <= PtrW'(0);
                 ==>
170              r_rptr_gray_q <= PtrW'(0);
171            end else if (r_rptr_inc) begin
                        -2-  
172              r_rptr_q      <= r_rptr_d;
                 ==>
173              r_rptr_gray_q <= r_rptr_gray_d;
174            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T65,T51,T68
0	0	Covered	T1,T2,T3

204            if (!rst_rd_ni) begin
               -1-  
205              r_sram_rptr <= PtrW'(0);
                 ==>
206            end else if (r_sram_rptr_inc) begin
                        -2-  
207              r_sram_rptr <= r_sram_rptr + PtrW'(1);
                 ==>
208            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T65,T51,T68
0	0	Covered	T1,T2,T3

279            if (stored) begin
               -1-  
280              // storage has data. depends on rfifo_ack
281              // rfifo_ack can be replaced to rready_i as `rvalid_o` is 1
282              r_sram_req_o = !r_sramrptr_empty && rfifo_ack;
                 ==>
283            end else begin
284              // storage has no data.
285              // Can send request only when the reader accept the request or no
286              // previous request sent out.
287              r_sram_req_o = !r_sramrptr_empty && !(r_sram_rvalid_i ^ rfifo_ack);
                 ==>

Branches:

-1-	Status	Tests
1	Covered	T65,T51,T68
0	Covered	T1,T2,T3

324            if (!rst_rd_ni) begin
               -1-  
325              stored <= 1'b 0;
                 ==>
326              rdata_q <= Width'(0);
327            end else if (store_en) begin
                        -2-  
328              stored <= 1'b 1;
                 ==>
329              rdata_q <= rdata_d;
330            end else if (!r_sram_rvalid_i && rfifo_ack) begin
                        -3-                          
331              // No request sent, host reads the data
332              stored <= 1'b 0;
                 ==>
333              rdata_q <= Width'(0);
334            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	-3-	Status	Tests
1	-	-	Covered	T1,T2,T3
0	1	-	Covered	T65,T51,T68
0	0	1	Covered	T65,T51,T68
0	0	0	Covered	T1,T2,T3

349            decval_in = decval[PtrW-1] ? decval_sub : decval;
                                          -1-  
                                          ==>  
                                          ==>  

Branches:

-1-	Status	Tests
1	Covered	T49,T35,T50
0	Covered	T1,T2,T3

373            if (grayval[PtrW-1]) begin
               -1-  
374              gray2dec = dec_tmp_sub;
                 ==>
375              // Override MSB
376              gray2dec[PtrW-1] = 1'b1;
377              unused_decsub_msb = dec_tmp_sub[PtrW-1];
378            end else begin
379              gray2dec = dec_tmp;
                 ==>

Branches:

-1-	Status	Tests
1	Covered	T49,T35,T50
0	Covered	T1,T2,T3

---

Assert Coverage for Module : prim_fifo_async_sram_adapter

	Total	Attempted	Percent	Succeeded/Matched	Percent
Assertions	13	13	100.00	13	100.00
Cover properties	0	0		0
Cover sequences	0	0		0
Total	13	13	100.00	13	100.00

---

Assertion Details

Name	Attempts	Real Successes	Failures	Incomplete
MinDepth_A	1952	1952	0	0
NoRAckInEmpty_A	887347086	4189	0	0
NoWAckInFull_A	306284570	4189	0	0
ParamCheckDepth_A	1952	1952	0	0
RSramRvalidOneCycle_M	887347086	4189	0	0
RptrGrayOneBitAtATime_A	887347086	4189	0	0
RptrIncDataValid_A	887347086	4189	0	0
RptrIncrease_A	887347086	4189	0	0
SramRvalid_A	887347086	4189	0	0
WSramRvalid_A	306284570	306284570	0	0
WidthMatch_A	1952	1952	0	0
WptrGrayOneBitAtATime_A	306284570	4189	0	0
WptrIncrease_A	306284570	4189	0	0

MinDepth_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	1952	1952	0	0
T1	2	2	0	0
T2	2	2	0	0
T3	2	2	0	0
T4	2	2	0	0
T5	2	2	0	0
T6	2	2	0	0
T7	2	2	0	0
T8	2	2	0	0
T9	2	2	0	0
T10	2	2	0	0

NoRAckInEmpty_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	887347086	4189	0	0
T48	0	16	0	0
T51	0	4	0	0
T52	0	10	0	0
T53	0	8	0	0
T65	95598	4	0	0
T67	0	6	0	0
T68	0	4	0	0
T83	20278	0	0	0
T84	109896	0	0	0
T86	4236	0	0	0
T87	64384	0	0	0
T102	0	17	0	0
T103	0	2	0	0
T104	0	2	0	0
T105	121826	0	0	0
T106	144222	0	0	0
T107	141308	0	0	0
T108	42140	0	0	0
T109	0	12	0	0
T113	20474	0	0	0
T114	0	4	0	0
T115	0	4	0	0

NoWAckInFull_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	306284570	4189	0	0
T48	0	16	0	0
T51	0	4	0	0
T52	0	10	0	0
T53	0	8	0	0
T55	21216	0	0	0
T65	192092	4	0	0
T67	0	6	0	0
T68	0	4	0	0
T83	4320	0	0	0
T84	194046	0	0	0
T86	1008	0	0	0
T87	28186	0	0	0
T102	0	17	0	0
T103	0	2	0	0
T104	0	2	0	0
T105	38232	0	0	0
T106	68568	0	0	0
T107	16896	0	0	0
T108	16428	0	0	0
T109	0	12	0	0
T114	0	4	0	0
T115	0	4	0	0

ParamCheckDepth_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	1952	1952	0	0
T1	2	2	0	0
T2	2	2	0	0
T3	2	2	0	0
T4	2	2	0	0
T5	2	2	0	0
T6	2	2	0	0
T7	2	2	0	0
T8	2	2	0	0
T9	2	2	0	0
T10	2	2	0	0

RSramRvalidOneCycle_M

Name	Attempts	Real Successes	Failures	Incomplete
Total	887347086	4189	0	0
T48	0	16	0	0
T51	0	4	0	0
T52	0	10	0	0
T53	0	8	0	0
T65	95598	4	0	0
T67	0	6	0	0
T68	0	4	0	0
T83	20278	0	0	0
T84	109896	0	0	0
T86	4236	0	0	0
T87	64384	0	0	0
T102	0	17	0	0
T103	0	2	0	0
T104	0	2	0	0
T105	121826	0	0	0
T106	144222	0	0	0
T107	141308	0	0	0
T108	42140	0	0	0
T109	0	12	0	0
T113	20474	0	0	0
T114	0	4	0	0
T115	0	4	0	0

RptrGrayOneBitAtATime_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	887347086	4189	0	0
T48	0	16	0	0
T51	0	4	0	0
T52	0	10	0	0
T53	0	8	0	0
T65	95598	4	0	0
T67	0	6	0	0
T68	0	4	0	0
T83	20278	0	0	0
T84	109896	0	0	0
T86	4236	0	0	0
T87	64384	0	0	0
T102	0	17	0	0
T103	0	2	0	0
T104	0	2	0	0
T105	121826	0	0	0
T106	144222	0	0	0
T107	141308	0	0	0
T108	42140	0	0	0
T109	0	12	0	0
T113	20474	0	0	0
T114	0	4	0	0
T115	0	4	0	0

RptrIncDataValid_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	887347086	4189	0	0
T48	0	16	0	0
T51	0	4	0	0
T52	0	10	0	0
T53	0	8	0	0
T65	95598	4	0	0
T67	0	6	0	0
T68	0	4	0	0
T83	20278	0	0	0
T84	109896	0	0	0
T86	4236	0	0	0
T87	64384	0	0	0
T102	0	17	0	0
T103	0	2	0	0
T104	0	2	0	0
T105	121826	0	0	0
T106	144222	0	0	0
T107	141308	0	0	0
T108	42140	0	0	0
T109	0	12	0	0
T113	20474	0	0	0
T114	0	4	0	0
T115	0	4	0	0

RptrIncrease_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	887347086	4189	0	0
T48	0	16	0	0
T51	0	4	0	0
T52	0	10	0	0
T53	0	8	0	0
T65	95598	4	0	0
T67	0	6	0	0
T68	0	4	0	0
T83	20278	0	0	0
T84	109896	0	0	0
T86	4236	0	0	0
T87	64384	0	0	0
T102	0	17	0	0
T103	0	2	0	0
T104	0	2	0	0
T105	121826	0	0	0
T106	144222	0	0	0
T107	141308	0	0	0
T108	42140	0	0	0
T109	0	12	0	0
T113	20474	0	0	0
T114	0	4	0	0
T115	0	4	0	0

SramRvalid_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	887347086	4189	0	0
T48	0	16	0	0
T51	0	4	0	0
T52	0	10	0	0
T53	0	8	0	0
T65	95598	4	0	0
T67	0	6	0	0
T68	0	4	0	0
T83	20278	0	0	0
T84	109896	0	0	0
T86	4236	0	0	0
T87	64384	0	0	0
T102	0	17	0	0
T103	0	2	0	0
T104	0	2	0	0
T105	121826	0	0	0
T106	144222	0	0	0
T107	141308	0	0	0
T108	42140	0	0	0
T109	0	12	0	0
T113	20474	0	0	0
T114	0	4	0	0
T115	0	4	0	0

WSramRvalid_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	306284570	306284570	0	0
T4	1498	1498	0	0
T8	1008	1008	0	0
T10	2798	2798	0	0
T11	8626	8626	0	0
T13	31676	31676	0	0
T15	35882	35882	0	0
T16	113172	113172	0	0
T17	432	432	0	0
T18	37272	37272	0	0
T19	250980	250980	0	0

WidthMatch_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	1952	1952	0	0
T1	2	2	0	0
T2	2	2	0	0
T3	2	2	0	0
T4	2	2	0	0
T5	2	2	0	0
T6	2	2	0	0
T7	2	2	0	0
T8	2	2	0	0
T9	2	2	0	0
T10	2	2	0	0

WptrGrayOneBitAtATime_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	306284570	4189	0	0
T48	0	16	0	0
T51	0	4	0	0
T52	0	10	0	0
T53	0	8	0	0
T55	21216	0	0	0
T65	192092	4	0	0
T67	0	6	0	0
T68	0	4	0	0
T83	4320	0	0	0
T84	194046	0	0	0
T86	1008	0	0	0
T87	28186	0	0	0
T102	0	17	0	0
T103	0	2	0	0
T104	0	2	0	0
T105	38232	0	0	0
T106	68568	0	0	0
T107	16896	0	0	0
T108	16428	0	0	0
T109	0	12	0	0
T114	0	4	0	0
T115	0	4	0	0

WptrIncrease_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	306284570	4189	0	0
T48	0	16	0	0
T51	0	4	0	0
T52	0	10	0	0
T53	0	8	0	0
T55	21216	0	0	0
T65	192092	4	0	0
T67	0	6	0	0
T68	0	4	0	0
T83	4320	0	0	0
T84	194046	0	0	0
T86	1008	0	0	0
T87	28186	0	0	0
T102	0	17	0	0
T103	0	2	0	0
T104	0	2	0	0
T105	38232	0	0	0
T106	68568	0	0	0
T107	16896	0	0	0
T108	16428	0	0	0
T109	0	12	0	0
T114	0	4	0	0
T115	0	4	0	0

Line Coverage for Instance : tb.dut.u_upload.u_cmdfifo

	Line No.	Total	Covered	Percent
TOTAL		86	86	100.00
CONT_ASSIGN	121	1	1	100.00
CONT_ASSIGN	123	1	1	100.00
ALWAYS	126	6	6	100.00
CONT_ASSIGN	135	1	1	100.00
CONT_ASSIGN	136	1	1	100.00
CONT_ASSIGN	138	1	1	100.00
CONT_ASSIGN	149	1	1	100.00
CONT_ASSIGN	150	1	1	100.00
CONT_ASSIGN	151	1	1	100.00
CONT_ASSIGN	153	1	1	100.00
CONT_ASSIGN	163	1	1	100.00
CONT_ASSIGN	165	1	1	100.00
ALWAYS	168	6	6	100.00
CONT_ASSIGN	177	1	1	100.00
CONT_ASSIGN	178	1	1	100.00
CONT_ASSIGN	180	1	1	100.00
CONT_ASSIGN	191	1	1	100.00
CONT_ASSIGN	192	1	1	100.00
CONT_ASSIGN	193	1	1	100.00
CONT_ASSIGN	195	1	1	100.00
CONT_ASSIGN	201	1	1	100.00
ALWAYS	204	4	4	100.00
CONT_ASSIGN	211	1	1	100.00
CONT_ASSIGN	217	1	1	100.00
CONT_ASSIGN	218	1	1	100.00
CONT_ASSIGN	219	1	1	100.00
CONT_ASSIGN	222	1	1	100.00
CONT_ASSIGN	224	1	1	100.00
CONT_ASSIGN	225	1	1	100.00
CONT_ASSIGN	245	1	1	100.00
CONT_ASSIGN	247	1	1	100.00
CONT_ASSIGN	248	1	1	100.00
CONT_ASSIGN	251	1	1	100.00
CONT_ASSIGN	252	1	1	100.00
CONT_ASSIGN	254	1	1	100.00
CONT_ASSIGN	256	1	1	100.00
CONT_ASSIGN	260	1	1	100.00
ALWAYS	270	4	4	100.00
CONT_ASSIGN	291	1	1	100.00
CONT_ASSIGN	297	1	1	100.00
CONT_ASSIGN	299	1	1	100.00
CONT_ASSIGN	301	1	1	100.00
CONT_ASSIGN	304	1	1	100.00
CONT_ASSIGN	308	1	1	100.00
CONT_ASSIGN	321	1	1	100.00
ALWAYS	324	9	9	100.00
ROUTINE	347	7	7	100.00
ROUTINE	368	9	9	100.00

120                       // Begin: Write pointer sync to read clock ========================
121        1/1            assign w_wptr_inc = wvalid_i & wready_o;
           Tests:       T1 T2 T3 
122                     
123        1/1            assign w_wptr_d = w_wptr_q + PtrW'(1);
           Tests:       T1 T2 T3 
124                     
125                       always_ff @(posedge clk_wr_i or negedge rst_wr_ni) begin
126        1/1              if (!rst_wr_ni) begin
           Tests:       T1 T2 T3 
127        1/1                w_wptr_q      <= PtrW'(0);
           Tests:       T1 T2 T3 
128        1/1                w_wptr_gray_q <= PtrW'(0);
           Tests:       T1 T2 T3 
129        1/1              end else if (w_wptr_inc) begin
           Tests:       T4 T8 T10 
130        1/1                w_wptr_q      <= w_wptr_d;
           Tests:       T65 T51 T68 
131        1/1                w_wptr_gray_q <= w_wptr_gray_d;
           Tests:       T65 T51 T68 
132                         end
                        MISSING_ELSE
133                       end
134                     
135        1/1            assign w_wptr_v = w_wptr_q[0+:PtrVW];
           Tests:       T1 T2 T3 
136        1/1            assign w_wptr_p = w_wptr_q[PtrW-1];
           Tests:       T1 T2 T3 
137                     
138        1/1            assign w_wptr_gray_d = dec2gray(w_wptr_d);
           Tests:       T1 T2 T3 
139                     
140                       prim_flop_2sync #(
141                         .Width (PtrW)
142                       ) u_sync_wptr_gray (
143                         .clk_i  (clk_rd_i),
144                         .rst_ni (rst_rd_ni),
145                         .d_i    (w_wptr_gray_q),
146                         .q_o    (r_wptr_gray)
147                       );
148                     
149        1/1            assign r_wptr   = gray2dec(r_wptr_gray);
           Tests:       T1 T2 T3 
150        1/1            assign r_wptr_p = r_wptr[PtrW-1];
           Tests:       T1 T2 T3 
151        1/1            assign r_wptr_v = r_wptr[0+:PtrVW];
           Tests:       T1 T2 T3 
152                     
153        1/1            assign wdepth_o = (w_wptr_p == w_rptr_p)
           Tests:       T1 T2 T3 
154                                       ? DepthW'(w_wptr_v - w_rptr_v)
155                                       : DepthW'({1'b1, w_wptr_v} - {1'b 0, w_rptr_v});
156                       // End:   Write pointer sync to read clock ------------------------
157                     
158                       // Begin: Read pointer sync to write clock ========================
159                       //assign r_rptr_inc = rvalid_o & rready_i;
160                       //assign r_rptr_inc = r_sram_req_o && r_sram_gnt_i;
161                       // Increase the read pointer (crossing the clock domain) only when the
162                       // reader acked.
163        1/1            assign r_rptr_inc = rfifo_ack;
           Tests:       T65 T51 T68 
164                     
165        1/1            assign r_rptr_d = r_rptr_q + PtrW'(1);
           Tests:       T1 T2 T3 
166                     
167                       always_ff @(posedge clk_rd_i or negedge rst_rd_ni) begin
168        1/1              if (!rst_rd_ni) begin
           Tests:       T1 T2 T3 
169        1/1                r_rptr_q      <= PtrW'(0);
           Tests:       T1 T2 T3 
170        1/1                r_rptr_gray_q <= PtrW'(0);
           Tests:       T1 T2 T3 
171        1/1              end else if (r_rptr_inc) begin
           Tests:       T1 T2 T3 
172        1/1                r_rptr_q      <= r_rptr_d;
           Tests:       T65 T51 T68 
173        1/1                r_rptr_gray_q <= r_rptr_gray_d;
           Tests:       T65 T51 T68 
174                         end
                        MISSING_ELSE
175                       end
176                     
177        1/1            assign r_rptr_v = r_rptr_q[0+:PtrVW];
           Tests:       T1 T2 T3 
178        1/1            assign r_rptr_p = r_rptr_q[PtrW-1];
           Tests:       T1 T2 T3 
179                     
180        1/1            assign r_rptr_gray_d = dec2gray(r_rptr_d);
           Tests:       T1 T2 T3 
181                     
182                       prim_flop_2sync #(
183                         .Width (PtrW)
184                       ) u_sync_rptr_gray (
185                         .clk_i  (clk_wr_i),
186                         .rst_ni (rst_wr_ni),
187                         .d_i    (r_rptr_gray_q),
188                         .q_o    (w_rptr_gray)
189                       );
190                     
191        1/1            assign w_rptr = gray2dec(w_rptr_gray);
           Tests:       T1 T2 T3 
192        1/1            assign w_rptr_p = w_rptr[PtrW-1];
           Tests:       T1 T2 T3 
193        1/1            assign w_rptr_v = w_rptr[0+:PtrVW];
           Tests:       T1 T2 T3 
194                     
195        1/1            assign rdepth_o = (r_wptr_p == r_rptr_p)
           Tests:       T1 T2 T3 
196                                       ? DepthW'(r_wptr_v - r_rptr_v)
197                                       : DepthW'({1'b1, r_wptr_v} - {1'b 0, r_rptr_v});
198                       // End:   Read pointer sync to write clock ------------------------
199                     
200                       // Begin: SRAM Read pointer
201        1/1            assign r_sram_rptr_inc = rsram_ack;
           Tests:       T1 T2 T3 
202                     
203                       always_ff @(posedge clk_rd_i or negedge rst_rd_ni) begin
204        1/1              if (!rst_rd_ni) begin
           Tests:       T1 T2 T3 
205        1/1                r_sram_rptr <= PtrW'(0);
           Tests:       T1 T2 T3 
206        1/1              end else if (r_sram_rptr_inc) begin
           Tests:       T1 T2 T3 
207        1/1                r_sram_rptr <= r_sram_rptr + PtrW'(1);
           Tests:       T65 T51 T68 
208                         end
                        MISSING_ELSE
209                       end
210                     
211        1/1            assign r_sramrptr_empty = (r_wptr == r_sram_rptr);
           Tests:       T1 T2 T3 
212                       // End:   SRAM Read pointer
213                     
214                       // Full/ Empty
215                       // Lint complains PtrW'(1) << (PtrW-1). So changed as below
216                       localparam logic [PtrW-1:0] XorMask = {1'b 1, {PtrW-1{1'b0}}};
217        1/1            assign w_full  = (w_wptr_q == (w_rptr   ^ XorMask));
           Tests:       T1 T2 T3 
218        1/1            assign r_full  = (r_wptr   == (r_rptr_q ^ XorMask));
           Tests:       T1 T2 T3 
219        1/1            assign r_empty = (r_wptr   == r_rptr_q);
           Tests:       T1 T2 T3 
220                     
221                       logic  unused_r_empty;
222        1/1            assign unused_r_empty = r_empty;
           Tests:       T1 T2 T3 
223                     
224        1/1            assign r_full_o     = r_full;
           Tests:       T1 T2 T3 
225        1/1            assign w_full_o     = w_full;
           Tests:       T1 T2 T3 
226                     
227                       // The notempty status !(wptr == rptr) assert one clock earlier than the
228                       // actual `rvalid` signals.
229                       //
230                       // The reason is due to the SRAM read latency. The module uses SRAM FIFO
231                       // interface. When the logic in producer domain pushes entries, the pointer
232                       // is increased. This triggers the FIFO logic in the consumer clock domain
233                       // fetches data from SRAM.
234                       //
235                       // The pointer crosses the clock boundary. It takes usually two cycles (in
236                       // the consumer side). Then, as the read and write pointer in the read clock
237                       // domain has a gap by 1, the FIFO not empty status is raised.
238                       //
239                       // At this time, the logic just sent the read request to the SRAM. The data
240                       // is not yet read. The `rvalid` asserts when it receives data from the
241                       // SRAM.
242                       //
243                       // So, if the consumer reads data at the same cycle when notempty status is
244                       // raised, it reads incorrect data.
245        1/1            assign r_notempty_o = rvalid_o;
           Tests:       T1 T2 T3 
246                     
247        1/1            assign rsram_ack = r_sram_req_o && r_sram_gnt_i;
           Tests:       T1 T2 T3 
248        1/1            assign rfifo_ack = rvalid_o     && rready_i;
           Tests:       T1 T2 T3 
249                     
250                       // SRAM Write Request
251        1/1            assign w_sram_req_o   = wvalid_i && !w_full;
           Tests:       T1 T2 T3 
252        1/1            assign wready_o       = !w_full && w_sram_gnt_i;
           Tests:       T1 T2 T3 
253                       assign w_sram_write_o = 1'b 1; // Always write
254        1/1            assign w_sram_addr_o  = SramBaseAddr + SramAw'(w_wptr_v);
           Tests:       T1 T2 T3 
255                     
256        1/1            assign w_sram_wdata_o = SramDw'(wdata_i);
           Tests:       T1 T2 T3 
257                       assign w_sram_wmask_o = SramDw'({Width{1'b1}});
258                     
259                       logic unused_w_sram;
260        1/1            assign unused_w_sram = ^{w_sram_rvalid_i, w_sram_rdata_i, w_sram_rerror_i};
           Tests:       T1 T2 T3 
261                     
262                       // SRAM Read Request
263                       // Request Scenario (!r_empty):
264                       //  - storage empty: Send request if
265                       //               !r_sram_rvalid_i || (rfifo_ack && r_sram_rvalid_i);
266                       //  - storage !empty: depends on the rfifo_ack:
267                       //    - r_rptr_inc: Can request more
268                       //    - !r_rptr_inc: Can't request
269                       always_comb begin : r_sram_req
270        1/1              r_sram_req_o = 1'b 0;
           Tests:       T1 T2 T3 
271                         // Karnough Map (!empty): sram_req
272                         // {sram_rv, rfifo_ack} | 00 | 01          | 11 | 10
273                         // ----------------------------------------------------------
274                         // stored          | 0  |  1 |  impossible |  1 |  0
275                         //                 | 1  |  0 |  1          |  X |  impossible
276                         //
277                         // req_o = r_ptr_inc || (!stored && !r_sram_rvalid_i)
278                     
279        1/1              if (stored) begin
           Tests:       T1 T2 T3 
280                           // storage has data. depends on rfifo_ack
281                           // rfifo_ack can be replaced to rready_i as `rvalid_o` is 1
282        1/1                r_sram_req_o = !r_sramrptr_empty && rfifo_ack;
           Tests:       T65 T51 T68 
283                         end else begin
284                           // storage has no data.
285                           // Can send request only when the reader accept the request or no
286                           // previous request sent out.
287        1/1                r_sram_req_o = !r_sramrptr_empty && !(r_sram_rvalid_i ^ rfifo_ack);
           Tests:       T1 T2 T3 
288                         end
289                       end : r_sram_req
290                     
291        1/1            assign rvalid_o       = stored || r_sram_rvalid_i;
           Tests:       T1 T2 T3 
292                       assign r_sram_write_o = 1'b 0; // always read
293                       assign r_sram_wdata_o = '0;
294                       assign r_sram_wmask_o = '0;
295                     
296                       // Send SRAM request with sram read pointer.
297        1/1            assign r_sram_addr_o  = SramBaseAddr + SramAw'(r_sram_rptr[0+:PtrVW]);
           Tests:       T1 T2 T3 
298                     
299        1/1            assign rdata_d = (r_sram_rvalid_i) ? r_sram_rdata_i[0+:Width] : Width'(0);
           Tests:       T1 T2 T3 
300                     
301        1/1            assign rdata_o = (stored) ? rdata_q : rdata_d;
           Tests:       T1 T2 T3 
302                     
303                       logic unused_rsram;
304        1/1            assign unused_rsram = ^{r_sram_rerror_i};
           Tests:       T1 T2 T3 
305                     
306                       if (Width < SramDw) begin : g_unused_rdata
307                         logic unused_rdata;
308        1/1              assign unused_rdata = ^r_sram_rdata_i[SramDw-1:Width];
           Tests:       T2 T9 T10 
309                       end : g_unused_rdata
310                     
311                       // read clock domain rdata storage
312                       logic store_en;
313                     
314                       // Karnough Map (r_sram_rvalid_i):
315                       // rfifo_ack   | 0 | 1 |
316                       // ---------------------
317                       // stored    0 | 1 | 0 |
318                       //           1 | 0 | 1 |
319                       //
320                       // stored = s.r.v && XNOR(stored, rptr_inc)
321        1/1            assign store_en = r_sram_rvalid_i && !(stored ^ rfifo_ack);
           Tests:       T1 T2 T3 
322                     
323                       always_ff @(posedge clk_rd_i or negedge rst_rd_ni) begin
324        1/1              if (!rst_rd_ni) begin
           Tests:       T1 T2 T3 
325        1/1                stored <= 1'b 0;
           Tests:       T1 T2 T3 
326        1/1                rdata_q <= Width'(0);
           Tests:       T1 T2 T3 
327        1/1              end else if (store_en) begin
           Tests:       T1 T2 T3 
328        1/1                stored <= 1'b 1;
           Tests:       T65 T51 T68 
329        1/1                rdata_q <= rdata_d;
           Tests:       T65 T51 T68 
330        1/1              end else if (!r_sram_rvalid_i && rfifo_ack) begin
           Tests:       T1 T2 T3 
331                           // No request sent, host reads the data
332        1/1                stored <= 1'b 0;
           Tests:       T65 T51 T68 
333        1/1                rdata_q <= Width'(0);
           Tests:       T65 T51 T68 
334                         end
                        MISSING_ELSE
335                       end
336                     
337                       //////////////
338                       // Function //
339                       //////////////
340                     
341                       // dec2gray / gray2dec copied from prim_fifo_async.sv
342                       function automatic [PtrW-1:0] dec2gray(input logic [PtrW-1:0] decval);
343                         logic [PtrW-1:0] decval_sub;
344                         logic [PtrW-1:0] decval_in;
345                         logic            unused_decval_msb;
346                     
347        1/1              decval_sub = (PtrW)'(Depth) - {1'b0, decval[PtrW-2:0]} - 1'b1;
           Tests:       T1 T2 T3 
348                     
349        1/1              decval_in = decval[PtrW-1] ? decval_sub : decval;
           Tests:       T1 T2 T3 
350                     
351                         // We do not care about the MSB, hence we mask it out
352        1/1              unused_decval_msb = decval_in[PtrW-1];
           Tests:       T1 T2 T3 
353        1/1              decval_in[PtrW-1] = 1'b0;
           Tests:       T1 T2 T3 
354                     
355                         // Perform the XOR conversion
356        1/1              dec2gray = decval_in;
           Tests:       T1 T2 T3 
357        1/1              dec2gray ^= (decval_in >> 1);
           Tests:       T1 T2 T3 
358                     
359                         // Override the MSB
360        1/1              dec2gray[PtrW-1] = decval[PtrW-1];
           Tests:       T1 T2 T3 
361                       endfunction
362                     
363                       // Algorithm walks up from 0..N-1 then flips the upper bit and walks down from N-1 to 0.
364                       function automatic [PtrW-1:0] gray2dec(input logic [PtrW-1:0] grayval);
365                         logic [PtrW-1:0] dec_tmp, dec_tmp_sub;
366                         logic            unused_decsub_msb;
367                     
368        1/1              dec_tmp = '0;
           Tests:       T1 T2 T3 
369        1/1              for (int i = PtrW-2; i >= 0; i--) begin
           Tests:       T1 T2 T3 
370        1/1                dec_tmp[i] = dec_tmp[i+1] ^ grayval[i];
           Tests:       T1 T2 T3 
371                         end
372        1/1              dec_tmp_sub = (PtrW)'(Depth) - dec_tmp - 1'b1;
           Tests:       T1 T2 T3 
373        1/1              if (grayval[PtrW-1]) begin
           Tests:       T1 T2 T3 
374        1/1                gray2dec = dec_tmp_sub;
           Tests:       T49 T35 T50 
375                           // Override MSB
376        1/1                gray2dec[PtrW-1] = 1'b1;
           Tests:       T49 T35 T50 
377        1/1                unused_decsub_msb = dec_tmp_sub[PtrW-1];
           Tests:       T49 T35 T50 
378                         end else begin
379        1/1                gray2dec = dec_tmp;
           Tests:       T1 T2 T3 

---

Cond Coverage for Instance : tb.dut.u_upload.u_cmdfifo

	Total	Covered	Percent
Conditions	68	51	75.00
Logical	68	51	75.00
Non-Logical	0	0
Event	0	0

 LINE       121
 EXPRESSION (wvalid_i & wready_o)
             ----1---   ----2---

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Not Covered
1	1	Covered	T65,T51,T68

 LINE       153
 EXPRESSION ((w_wptr_p == w_rptr_p) ? (5'((w_wptr_v - w_rptr_v))) : (5'(({1'b1, w_wptr_v} - {1'b0, w_rptr_v}))))
             -----------1----------

-1-	Status	Tests
0	Covered	T49,T35,T50
1	Covered	T1,T2,T3

 LINE       153
 SUB-EXPRESSION (w_wptr_p == w_rptr_p)
                -----------1----------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       195
 EXPRESSION ((r_wptr_p == r_rptr_p) ? (5'((r_wptr_v - r_rptr_v))) : (5'(({1'b1, r_wptr_v} - {1'b0, r_rptr_v}))))
             -----------1----------

-1-	Status	Tests
0	Covered	T49,T35,T50
1	Covered	T1,T2,T3

 LINE       195
 SUB-EXPRESSION (r_wptr_p == r_rptr_p)
                -----------1----------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       211
 EXPRESSION (r_wptr == r_sram_rptr)
            -----------1-----------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       217
 EXPRESSION (w_wptr_q == (w_rptr ^ XorMask))
            ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Not Covered

 LINE       218
 EXPRESSION (r_wptr == (r_rptr_q ^ XorMask))
            ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Not Covered

 LINE       219
 EXPRESSION (r_wptr == r_rptr_q)
            ----------1---------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       247
 EXPRESSION (r_sram_req_o && r_sram_gnt_i)
             ------1-----    ------2-----

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Not Covered
1	1	Covered	T65,T51,T68

 LINE       248
 EXPRESSION (rvalid_o && rready_i)
             ----1---    ----2---

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T65,T51,T68
1	1	Covered	T65,T51,T68

 LINE       251
 EXPRESSION (wvalid_i && ((!w_full)))
             ----1---    -----2-----

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Not Covered
1	1	Covered	T65,T51,T68

 LINE       252
 EXPRESSION (((!w_full)) && w_sram_gnt_i)
             -----1-----    ------2-----

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T1,T2,T3
1	1	Covered	T65,T51,T68

 LINE       282
 EXPRESSION (((!r_sramrptr_empty)) && rfifo_ack)
             ----------1----------    ----2----

-1-	-2-	Status	Tests
0	1	Covered	T65,T51,T68
1	0	Not Covered
1	1	Not Covered

 LINE       287
 EXPRESSION (((!r_sramrptr_empty)) && ( ! (r_sram_rvalid_i ^ rfifo_ack) ))
             ----------1----------    -----------------2-----------------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Not Covered
1	1	Covered	T65,T51,T68

 LINE       287
 SUB-EXPRESSION ( ! (r_sram_rvalid_i ^ rfifo_ack) )
                    --------------1--------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T65,T51,T68

 LINE       287
 SUB-EXPRESSION (r_sram_rvalid_i ^ rfifo_ack)
                 -------1-------   ----2----

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Not Covered
1	0	Covered	T65,T51,T68
1	1	Not Covered

 LINE       291
 EXPRESSION (stored || r_sram_rvalid_i)
             ---1--    -------2-------

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T65,T51,T68
1	0	Covered	T65,T51,T68

 LINE       299
 EXPRESSION (r_sram_rvalid_i ? r_sram_rdata_i[0+:Width] : (16'(0)))
             -------1-------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T65,T51,T68

 LINE       301
 EXPRESSION (stored ? rdata_q : rdata_d)
             ---1--

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T65,T51,T68

 LINE       321
 EXPRESSION (r_sram_rvalid_i && ( ! (stored ^ rfifo_ack) ))
             -------1-------    -------------2------------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Not Covered
1	1	Covered	T65,T51,T68

 LINE       321
 SUB-EXPRESSION ( ! (stored ^ rfifo_ack) )
                    ----------1---------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T65,T51,T68

 LINE       321
 SUB-EXPRESSION (stored ^ rfifo_ack)
                 ---1--   ----2----

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Not Covered
1	0	Covered	T65,T51,T68
1	1	Covered	T65,T51,T68

 LINE       330
 EXPRESSION (((!r_sram_rvalid_i)) && rfifo_ack)
             ----------1---------    ----2----

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T1,T2,T3
1	1	Covered	T65,T51,T68

 LINE       349
 EXPRESSION (decval[(PtrW - 1)] ? decval_sub : decval)
             ---------1--------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T49,T35,T50

 LINE       370
 EXPRESSION (dec_tmp[(i + 1)] ^ grayval[i])
             --------1-------   -----2----

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T65,T51,T68
1	0	Covered	T51,T52,T67
1	1	Covered	T65,T51,T68

---

Branch Coverage for Instance : tb.dut.u_upload.u_cmdfifo

	Line No.	Total	Covered	Percent
Branches		27	27	100.00
TERNARY	153	2	2	100.00
TERNARY	195	2	2	100.00
TERNARY	299	2	2	100.00
TERNARY	301	2	2	100.00
IF	126	3	3	100.00
IF	168	3	3	100.00
IF	204	3	3	100.00
IF	279	2	2	100.00
IF	324	4	4	100.00
TERNARY	349	2	2	100.00
IF	373	2	2	100.00

153          assign wdepth_o = (w_wptr_p == w_rptr_p)
                                                     
154                          ? DepthW'(w_wptr_v - w_rptr_v)
                             -1-  
                             ==>  
                             ==>  

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T49,T35,T50

195          assign rdepth_o = (r_wptr_p == r_rptr_p)
                                                     
196                          ? DepthW'(r_wptr_v - r_rptr_v)
                             -1-  
                             ==>  
                             ==>  

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T49,T35,T50

299          assign rdata_d = (r_sram_rvalid_i) ? r_sram_rdata_i[0+:Width] : Width'(0);
                                                -1-  
                                                ==>  
                                                ==>  

Branches:

-1-	Status	Tests
1	Covered	T65,T51,T68
0	Covered	T1,T2,T3

301          assign rdata_o = (stored) ? rdata_q : rdata_d;
                                       -1-  
                                       ==>  
                                       ==>  

Branches:

-1-	Status	Tests
1	Covered	T65,T51,T68
0	Covered	T1,T2,T3

126            if (!rst_wr_ni) begin
               -1-  
127              w_wptr_q      <= PtrW'(0);
                 ==>
128              w_wptr_gray_q <= PtrW'(0);
129            end else if (w_wptr_inc) begin
                        -2-  
130              w_wptr_q      <= w_wptr_d;
                 ==>
131              w_wptr_gray_q <= w_wptr_gray_d;
132            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T65,T51,T68
0	0	Covered	T4,T8,T10

168            if (!rst_rd_ni) begin
               -1-  
169              r_rptr_q      <= PtrW'(0);
                 ==>
170              r_rptr_gray_q <= PtrW'(0);
171            end else if (r_rptr_inc) begin
                        -2-  
172              r_rptr_q      <= r_rptr_d;
                 ==>
173              r_rptr_gray_q <= r_rptr_gray_d;
174            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T65,T51,T68
0	0	Covered	T1,T2,T3

204            if (!rst_rd_ni) begin
               -1-  
205              r_sram_rptr <= PtrW'(0);
                 ==>
206            end else if (r_sram_rptr_inc) begin
                        -2-  
207              r_sram_rptr <= r_sram_rptr + PtrW'(1);
                 ==>
208            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T65,T51,T68
0	0	Covered	T1,T2,T3

279            if (stored) begin
               -1-  
280              // storage has data. depends on rfifo_ack
281              // rfifo_ack can be replaced to rready_i as `rvalid_o` is 1
282              r_sram_req_o = !r_sramrptr_empty && rfifo_ack;
                 ==>
283            end else begin
284              // storage has no data.
285              // Can send request only when the reader accept the request or no
286              // previous request sent out.
287              r_sram_req_o = !r_sramrptr_empty && !(r_sram_rvalid_i ^ rfifo_ack);
                 ==>

Branches:

-1-	Status	Tests
1	Covered	T65,T51,T68
0	Covered	T1,T2,T3

324            if (!rst_rd_ni) begin
               -1-  
325              stored <= 1'b 0;
                 ==>
326              rdata_q <= Width'(0);
327            end else if (store_en) begin
                        -2-  
328              stored <= 1'b 1;
                 ==>
329              rdata_q <= rdata_d;
330            end else if (!r_sram_rvalid_i && rfifo_ack) begin
                        -3-                          
331              // No request sent, host reads the data
332              stored <= 1'b 0;
                 ==>
333              rdata_q <= Width'(0);
334            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	-3-	Status	Tests
1	-	-	Covered	T1,T2,T3
0	1	-	Covered	T65,T51,T68
0	0	1	Covered	T65,T51,T68
0	0	0	Covered	T1,T2,T3

349            decval_in = decval[PtrW-1] ? decval_sub : decval;
                                          -1-  
                                          ==>  
                                          ==>  

Branches:

-1-	Status	Tests
1	Covered	T49,T35,T50
0	Covered	T1,T2,T3

373            if (grayval[PtrW-1]) begin
               -1-  
374              gray2dec = dec_tmp_sub;
                 ==>
375              // Override MSB
376              gray2dec[PtrW-1] = 1'b1;
377              unused_decsub_msb = dec_tmp_sub[PtrW-1];
378            end else begin
379              gray2dec = dec_tmp;
                 ==>

Branches:

-1-	Status	Tests
1	Covered	T49,T35,T50
0	Covered	T1,T2,T3

---

Assert Coverage for Instance : tb.dut.u_upload.u_cmdfifo

	Total	Attempted	Percent	Succeeded/Matched	Percent
Assertions	13	13	100.00	13	100.00
Cover properties	0	0		0
Cover sequences	0	0		0
Total	13	13	100.00	13	100.00

---

Assertion Details

Name	Attempts	Real Successes	Failures	Incomplete
MinDepth_A	976	976	0	0
NoRAckInEmpty_A	443673543	2363	0	0
NoWAckInFull_A	153142285	2363	0	0
ParamCheckDepth_A	976	976	0	0
RSramRvalidOneCycle_M	443673543	2363	0	0
RptrGrayOneBitAtATime_A	443673543	2363	0	0
RptrIncDataValid_A	443673543	2363	0	0
RptrIncrease_A	443673543	2363	0	0
SramRvalid_A	443673543	2363	0	0
WSramRvalid_A	153142285	153142285	0	0
WidthMatch_A	976	976	0	0
WptrGrayOneBitAtATime_A	153142285	2363	0	0
WptrIncrease_A	153142285	2363	0	0

MinDepth_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	976	976	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

NoRAckInEmpty_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	443673543	2363	0	0
T48	0	8	0	0
T51	0	4	0	0
T52	0	5	0	0
T53	0	4	0	0
T65	47799	2	0	0
T67	0	3	0	0
T68	0	2	0	0
T83	10139	0	0	0
T84	54948	0	0	0
T86	2118	0	0	0
T87	32192	0	0	0
T102	0	10	0	0
T103	0	2	0	0
T104	0	2	0	0
T105	60913	0	0	0
T106	72111	0	0	0
T107	70654	0	0	0
T108	21070	0	0	0
T113	10237	0	0	0

NoWAckInFull_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	153142285	2363	0	0
T48	0	8	0	0
T51	0	4	0	0
T52	0	5	0	0
T53	0	4	0	0
T55	10608	0	0	0
T65	96046	2	0	0
T67	0	3	0	0
T68	0	2	0	0
T83	2160	0	0	0
T84	97023	0	0	0
T86	504	0	0	0
T87	14093	0	0	0
T102	0	10	0	0
T103	0	2	0	0
T104	0	2	0	0
T105	19116	0	0	0
T106	34284	0	0	0
T107	8448	0	0	0
T108	8214	0	0	0

ParamCheckDepth_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	976	976	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

RSramRvalidOneCycle_M

Name	Attempts	Real Successes	Failures	Incomplete
Total	443673543	2363	0	0
T48	0	8	0	0
T51	0	4	0	0
T52	0	5	0	0
T53	0	4	0	0
T65	47799	2	0	0
T67	0	3	0	0
T68	0	2	0	0
T83	10139	0	0	0
T84	54948	0	0	0
T86	2118	0	0	0
T87	32192	0	0	0
T102	0	10	0	0
T103	0	2	0	0
T104	0	2	0	0
T105	60913	0	0	0
T106	72111	0	0	0
T107	70654	0	0	0
T108	21070	0	0	0
T113	10237	0	0	0

RptrGrayOneBitAtATime_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	443673543	2363	0	0
T48	0	8	0	0
T51	0	4	0	0
T52	0	5	0	0
T53	0	4	0	0
T65	47799	2	0	0
T67	0	3	0	0
T68	0	2	0	0
T83	10139	0	0	0
T84	54948	0	0	0
T86	2118	0	0	0
T87	32192	0	0	0
T102	0	10	0	0
T103	0	2	0	0
T104	0	2	0	0
T105	60913	0	0	0
T106	72111	0	0	0
T107	70654	0	0	0
T108	21070	0	0	0
T113	10237	0	0	0

RptrIncDataValid_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	443673543	2363	0	0
T48	0	8	0	0
T51	0	4	0	0
T52	0	5	0	0
T53	0	4	0	0
T65	47799	2	0	0
T67	0	3	0	0
T68	0	2	0	0
T83	10139	0	0	0
T84	54948	0	0	0
T86	2118	0	0	0
T87	32192	0	0	0
T102	0	10	0	0
T103	0	2	0	0
T104	0	2	0	0
T105	60913	0	0	0
T106	72111	0	0	0
T107	70654	0	0	0
T108	21070	0	0	0
T113	10237	0	0	0

RptrIncrease_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	443673543	2363	0	0
T48	0	8	0	0
T51	0	4	0	0
T52	0	5	0	0
T53	0	4	0	0
T65	47799	2	0	0
T67	0	3	0	0
T68	0	2	0	0
T83	10139	0	0	0
T84	54948	0	0	0
T86	2118	0	0	0
T87	32192	0	0	0
T102	0	10	0	0
T103	0	2	0	0
T104	0	2	0	0
T105	60913	0	0	0
T106	72111	0	0	0
T107	70654	0	0	0
T108	21070	0	0	0
T113	10237	0	0	0

SramRvalid_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	443673543	2363	0	0
T48	0	8	0	0
T51	0	4	0	0
T52	0	5	0	0
T53	0	4	0	0
T65	47799	2	0	0
T67	0	3	0	0
T68	0	2	0	0
T83	10139	0	0	0
T84	54948	0	0	0
T86	2118	0	0	0
T87	32192	0	0	0
T102	0	10	0	0
T103	0	2	0	0
T104	0	2	0	0
T105	60913	0	0	0
T106	72111	0	0	0
T107	70654	0	0	0
T108	21070	0	0	0
T113	10237	0	0	0

WSramRvalid_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	153142285	153142285	0	0
T4	749	749	0	0
T8	504	504	0	0
T10	1399	1399	0	0
T11	4313	4313	0	0
T13	15838	15838	0	0
T15	17941	17941	0	0
T16	56586	56586	0	0
T17	216	216	0	0
T18	18636	18636	0	0
T19	125490	125490	0	0

WidthMatch_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	976	976	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

WptrGrayOneBitAtATime_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	153142285	2363	0	0
T48	0	8	0	0
T51	0	4	0	0
T52	0	5	0	0
T53	0	4	0	0
T55	10608	0	0	0
T65	96046	2	0	0
T67	0	3	0	0
T68	0	2	0	0
T83	2160	0	0	0
T84	97023	0	0	0
T86	504	0	0	0
T87	14093	0	0	0
T102	0	10	0	0
T103	0	2	0	0
T104	0	2	0	0
T105	19116	0	0	0
T106	34284	0	0	0
T107	8448	0	0	0
T108	8214	0	0	0

WptrIncrease_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	153142285	2363	0	0
T48	0	8	0	0
T51	0	4	0	0
T52	0	5	0	0
T53	0	4	0	0
T55	10608	0	0	0
T65	96046	2	0	0
T67	0	3	0	0
T68	0	2	0	0
T83	2160	0	0	0
T84	97023	0	0	0
T86	504	0	0	0
T87	14093	0	0	0
T102	0	10	0	0
T103	0	2	0	0
T104	0	2	0	0
T105	19116	0	0	0
T106	34284	0	0	0
T107	8448	0	0	0
T108	8214	0	0	0

Line Coverage for Instance : tb.dut.u_upload.u_addrfifo

	Line No.	Total	Covered	Percent
TOTAL		85	85	100.00
CONT_ASSIGN	121	1	1	100.00
CONT_ASSIGN	123	1	1	100.00
ALWAYS	126	6	6	100.00
CONT_ASSIGN	135	1	1	100.00
CONT_ASSIGN	136	1	1	100.00
CONT_ASSIGN	138	1	1	100.00
CONT_ASSIGN	149	1	1	100.00
CONT_ASSIGN	150	1	1	100.00
CONT_ASSIGN	151	1	1	100.00
CONT_ASSIGN	153	1	1	100.00
CONT_ASSIGN	163	1	1	100.00
CONT_ASSIGN	165	1	1	100.00
ALWAYS	168	6	6	100.00
CONT_ASSIGN	177	1	1	100.00
CONT_ASSIGN	178	1	1	100.00
CONT_ASSIGN	180	1	1	100.00
CONT_ASSIGN	191	1	1	100.00
CONT_ASSIGN	192	1	1	100.00
CONT_ASSIGN	193	1	1	100.00
CONT_ASSIGN	195	1	1	100.00
CONT_ASSIGN	201	1	1	100.00
ALWAYS	204	4	4	100.00
CONT_ASSIGN	211	1	1	100.00
CONT_ASSIGN	217	1	1	100.00
CONT_ASSIGN	218	1	1	100.00
CONT_ASSIGN	219	1	1	100.00
CONT_ASSIGN	222	1	1	100.00
CONT_ASSIGN	224	1	1	100.00
CONT_ASSIGN	225	1	1	100.00
CONT_ASSIGN	245	1	1	100.00
CONT_ASSIGN	247	1	1	100.00
CONT_ASSIGN	248	1	1	100.00
CONT_ASSIGN	251	1	1	100.00
CONT_ASSIGN	252	1	1	100.00
CONT_ASSIGN	254	1	1	100.00
CONT_ASSIGN	256	1	1	100.00
CONT_ASSIGN	260	1	1	100.00
ALWAYS	270	4	4	100.00
CONT_ASSIGN	291	1	1	100.00
CONT_ASSIGN	297	1	1	100.00
CONT_ASSIGN	299	1	1	100.00
CONT_ASSIGN	301	1	1	100.00
CONT_ASSIGN	304	1	1	100.00
CONT_ASSIGN	321	1	1	100.00
ALWAYS	324	9	9	100.00
ROUTINE	347	7	7	100.00
ROUTINE	368	9	9	100.00

120                       // Begin: Write pointer sync to read clock ========================
121        1/1            assign w_wptr_inc = wvalid_i & wready_o;
           Tests:       T1 T2 T3 
122                     
123        1/1            assign w_wptr_d = w_wptr_q + PtrW'(1);
           Tests:       T1 T2 T3 
124                     
125                       always_ff @(posedge clk_wr_i or negedge rst_wr_ni) begin
126        1/1              if (!rst_wr_ni) begin
           Tests:       T1 T2 T3 
127        1/1                w_wptr_q      <= PtrW'(0);
           Tests:       T1 T2 T3 
128        1/1                w_wptr_gray_q <= PtrW'(0);
           Tests:       T1 T2 T3 
129        1/1              end else if (w_wptr_inc) begin
           Tests:       T4 T8 T10 
130        1/1                w_wptr_q      <= w_wptr_d;
           Tests:       T65 T68 T52 
131        1/1                w_wptr_gray_q <= w_wptr_gray_d;
           Tests:       T65 T68 T52 
132                         end
                        MISSING_ELSE
133                       end
134                     
135        1/1            assign w_wptr_v = w_wptr_q[0+:PtrVW];
           Tests:       T1 T2 T3 
136        1/1            assign w_wptr_p = w_wptr_q[PtrW-1];
           Tests:       T1 T2 T3 
137                     
138        1/1            assign w_wptr_gray_d = dec2gray(w_wptr_d);
           Tests:       T1 T2 T3 
139                     
140                       prim_flop_2sync #(
141                         .Width (PtrW)
142                       ) u_sync_wptr_gray (
143                         .clk_i  (clk_rd_i),
144                         .rst_ni (rst_rd_ni),
145                         .d_i    (w_wptr_gray_q),
146                         .q_o    (r_wptr_gray)
147                       );
148                     
149        1/1            assign r_wptr   = gray2dec(r_wptr_gray);
           Tests:       T1 T2 T3 
150        1/1            assign r_wptr_p = r_wptr[PtrW-1];
           Tests:       T1 T2 T3 
151        1/1            assign r_wptr_v = r_wptr[0+:PtrVW];
           Tests:       T1 T2 T3 
152                     
153        1/1            assign wdepth_o = (w_wptr_p == w_rptr_p)
           Tests:       T1 T2 T3 
154                                       ? DepthW'(w_wptr_v - w_rptr_v)
155                                       : DepthW'({1'b1, w_wptr_v} - {1'b 0, w_rptr_v});
156                       // End:   Write pointer sync to read clock ------------------------
157                     
158                       // Begin: Read pointer sync to write clock ========================
159                       //assign r_rptr_inc = rvalid_o & rready_i;
160                       //assign r_rptr_inc = r_sram_req_o && r_sram_gnt_i;
161                       // Increase the read pointer (crossing the clock domain) only when the
162                       // reader acked.
163        1/1            assign r_rptr_inc = rfifo_ack;
           Tests:       T65 T68 T52 
164                     
165        1/1            assign r_rptr_d = r_rptr_q + PtrW'(1);
           Tests:       T1 T2 T3 
166                     
167                       always_ff @(posedge clk_rd_i or negedge rst_rd_ni) begin
168        1/1              if (!rst_rd_ni) begin
           Tests:       T1 T2 T3 
169        1/1                r_rptr_q      <= PtrW'(0);
           Tests:       T1 T2 T3 
170        1/1                r_rptr_gray_q <= PtrW'(0);
           Tests:       T1 T2 T3 
171        1/1              end else if (r_rptr_inc) begin
           Tests:       T1 T2 T3 
172        1/1                r_rptr_q      <= r_rptr_d;
           Tests:       T65 T68 T52 
173        1/1                r_rptr_gray_q <= r_rptr_gray_d;
           Tests:       T65 T68 T52 
174                         end
                        MISSING_ELSE
175                       end
176                     
177        1/1            assign r_rptr_v = r_rptr_q[0+:PtrVW];
           Tests:       T1 T2 T3 
178        1/1            assign r_rptr_p = r_rptr_q[PtrW-1];
           Tests:       T1 T2 T3 
179                     
180        1/1            assign r_rptr_gray_d = dec2gray(r_rptr_d);
           Tests:       T1 T2 T3 
181                     
182                       prim_flop_2sync #(
183                         .Width (PtrW)
184                       ) u_sync_rptr_gray (
185                         .clk_i  (clk_wr_i),
186                         .rst_ni (rst_wr_ni),
187                         .d_i    (r_rptr_gray_q),
188                         .q_o    (w_rptr_gray)
189                       );
190                     
191        1/1            assign w_rptr = gray2dec(w_rptr_gray);
           Tests:       T1 T2 T3 
192        1/1            assign w_rptr_p = w_rptr[PtrW-1];
           Tests:       T1 T2 T3 
193        1/1            assign w_rptr_v = w_rptr[0+:PtrVW];
           Tests:       T1 T2 T3 
194                     
195        1/1            assign rdepth_o = (r_wptr_p == r_rptr_p)
           Tests:       T1 T2 T3 
196                                       ? DepthW'(r_wptr_v - r_rptr_v)
197                                       : DepthW'({1'b1, r_wptr_v} - {1'b 0, r_rptr_v});
198                       // End:   Read pointer sync to write clock ------------------------
199                     
200                       // Begin: SRAM Read pointer
201        1/1            assign r_sram_rptr_inc = rsram_ack;
           Tests:       T1 T2 T3 
202                     
203                       always_ff @(posedge clk_rd_i or negedge rst_rd_ni) begin
204        1/1              if (!rst_rd_ni) begin
           Tests:       T1 T2 T3 
205        1/1                r_sram_rptr <= PtrW'(0);
           Tests:       T1 T2 T3 
206        1/1              end else if (r_sram_rptr_inc) begin
           Tests:       T1 T2 T3 
207        1/1                r_sram_rptr <= r_sram_rptr + PtrW'(1);
           Tests:       T65 T68 T52 
208                         end
                        MISSING_ELSE
209                       end
210                     
211        1/1            assign r_sramrptr_empty = (r_wptr == r_sram_rptr);
           Tests:       T1 T2 T3 
212                       // End:   SRAM Read pointer
213                     
214                       // Full/ Empty
215                       // Lint complains PtrW'(1) << (PtrW-1). So changed as below
216                       localparam logic [PtrW-1:0] XorMask = {1'b 1, {PtrW-1{1'b0}}};
217        1/1            assign w_full  = (w_wptr_q == (w_rptr   ^ XorMask));
           Tests:       T1 T2 T3 
218        1/1            assign r_full  = (r_wptr   == (r_rptr_q ^ XorMask));
           Tests:       T1 T2 T3 
219        1/1            assign r_empty = (r_wptr   == r_rptr_q);
           Tests:       T1 T2 T3 
220                     
221                       logic  unused_r_empty;
222        1/1            assign unused_r_empty = r_empty;
           Tests:       T1 T2 T3 
223                     
224        1/1            assign r_full_o     = r_full;
           Tests:       T1 T2 T3 
225        1/1            assign w_full_o     = w_full;
           Tests:       T1 T2 T3 
226                     
227                       // The notempty status !(wptr == rptr) assert one clock earlier than the
228                       // actual `rvalid` signals.
229                       //
230                       // The reason is due to the SRAM read latency. The module uses SRAM FIFO
231                       // interface. When the logic in producer domain pushes entries, the pointer
232                       // is increased. This triggers the FIFO logic in the consumer clock domain
233                       // fetches data from SRAM.
234                       //
235                       // The pointer crosses the clock boundary. It takes usually two cycles (in
236                       // the consumer side). Then, as the read and write pointer in the read clock
237                       // domain has a gap by 1, the FIFO not empty status is raised.
238                       //
239                       // At this time, the logic just sent the read request to the SRAM. The data
240                       // is not yet read. The `rvalid` asserts when it receives data from the
241                       // SRAM.
242                       //
243                       // So, if the consumer reads data at the same cycle when notempty status is
244                       // raised, it reads incorrect data.
245        1/1            assign r_notempty_o = rvalid_o;
           Tests:       T1 T2 T3 
246                     
247        1/1            assign rsram_ack = r_sram_req_o && r_sram_gnt_i;
           Tests:       T1 T2 T3 
248        1/1            assign rfifo_ack = rvalid_o     && rready_i;
           Tests:       T1 T2 T3 
249                     
250                       // SRAM Write Request
251        1/1            assign w_sram_req_o   = wvalid_i && !w_full;
           Tests:       T1 T2 T3 
252        1/1            assign wready_o       = !w_full && w_sram_gnt_i;
           Tests:       T1 T2 T3 
253                       assign w_sram_write_o = 1'b 1; // Always write
254        1/1            assign w_sram_addr_o  = SramBaseAddr + SramAw'(w_wptr_v);
           Tests:       T1 T2 T3 
255                     
256        1/1            assign w_sram_wdata_o = SramDw'(wdata_i);
           Tests:       T1 T2 T3 
257                       assign w_sram_wmask_o = SramDw'({Width{1'b1}});
258                     
259                       logic unused_w_sram;
260        1/1            assign unused_w_sram = ^{w_sram_rvalid_i, w_sram_rdata_i, w_sram_rerror_i};
           Tests:       T1 T2 T3 
261                     
262                       // SRAM Read Request
263                       // Request Scenario (!r_empty):
264                       //  - storage empty: Send request if
265                       //               !r_sram_rvalid_i || (rfifo_ack && r_sram_rvalid_i);
266                       //  - storage !empty: depends on the rfifo_ack:
267                       //    - r_rptr_inc: Can request more
268                       //    - !r_rptr_inc: Can't request
269                       always_comb begin : r_sram_req
270        1/1              r_sram_req_o = 1'b 0;
           Tests:       T1 T2 T3 
271                         // Karnough Map (!empty): sram_req
272                         // {sram_rv, rfifo_ack} | 00 | 01          | 11 | 10
273                         // ----------------------------------------------------------
274                         // stored          | 0  |  1 |  impossible |  1 |  0
275                         //                 | 1  |  0 |  1          |  X |  impossible
276                         //
277                         // req_o = r_ptr_inc || (!stored && !r_sram_rvalid_i)
278                     
279        1/1              if (stored) begin
           Tests:       T1 T2 T3 
280                           // storage has data. depends on rfifo_ack
281                           // rfifo_ack can be replaced to rready_i as `rvalid_o` is 1
282        1/1                r_sram_req_o = !r_sramrptr_empty && rfifo_ack;
           Tests:       T65 T68 T52 
283                         end else begin
284                           // storage has no data.
285                           // Can send request only when the reader accept the request or no
286                           // previous request sent out.
287        1/1                r_sram_req_o = !r_sramrptr_empty && !(r_sram_rvalid_i ^ rfifo_ack);
           Tests:       T1 T2 T3 
288                         end
289                       end : r_sram_req
290                     
291        1/1            assign rvalid_o       = stored || r_sram_rvalid_i;
           Tests:       T1 T2 T3 
292                       assign r_sram_write_o = 1'b 0; // always read
293                       assign r_sram_wdata_o = '0;
294                       assign r_sram_wmask_o = '0;
295                     
296                       // Send SRAM request with sram read pointer.
297        1/1            assign r_sram_addr_o  = SramBaseAddr + SramAw'(r_sram_rptr[0+:PtrVW]);
           Tests:       T1 T2 T3 
298                     
299        1/1            assign rdata_d = (r_sram_rvalid_i) ? r_sram_rdata_i[0+:Width] : Width'(0);
           Tests:       T1 T2 T3 
300                     
301        1/1            assign rdata_o = (stored) ? rdata_q : rdata_d;
           Tests:       T1 T2 T3 
302                     
303                       logic unused_rsram;
304        1/1            assign unused_rsram = ^{r_sram_rerror_i};
           Tests:       T1 T2 T3 
305                     
306                       if (Width < SramDw) begin : g_unused_rdata
307                         logic unused_rdata;
308                         assign unused_rdata = ^r_sram_rdata_i[SramDw-1:Width];
309                       end : g_unused_rdata
310                     
311                       // read clock domain rdata storage
312                       logic store_en;
313                     
314                       // Karnough Map (r_sram_rvalid_i):
315                       // rfifo_ack   | 0 | 1 |
316                       // ---------------------
317                       // stored    0 | 1 | 0 |
318                       //           1 | 0 | 1 |
319                       //
320                       // stored = s.r.v && XNOR(stored, rptr_inc)
321        1/1            assign store_en = r_sram_rvalid_i && !(stored ^ rfifo_ack);
           Tests:       T1 T2 T3 
322                     
323                       always_ff @(posedge clk_rd_i or negedge rst_rd_ni) begin
324        1/1              if (!rst_rd_ni) begin
           Tests:       T1 T2 T3 
325        1/1                stored <= 1'b 0;
           Tests:       T1 T2 T3 
326        1/1                rdata_q <= Width'(0);
           Tests:       T1 T2 T3 
327        1/1              end else if (store_en) begin
           Tests:       T1 T2 T3 
328        1/1                stored <= 1'b 1;
           Tests:       T65 T68 T52 
329        1/1                rdata_q <= rdata_d;
           Tests:       T65 T68 T52 
330        1/1              end else if (!r_sram_rvalid_i && rfifo_ack) begin
           Tests:       T1 T2 T3 
331                           // No request sent, host reads the data
332        1/1                stored <= 1'b 0;
           Tests:       T65 T68 T52 
333        1/1                rdata_q <= Width'(0);
           Tests:       T65 T68 T52 
334                         end
                        MISSING_ELSE
335                       end
336                     
337                       //////////////
338                       // Function //
339                       //////////////
340                     
341                       // dec2gray / gray2dec copied from prim_fifo_async.sv
342                       function automatic [PtrW-1:0] dec2gray(input logic [PtrW-1:0] decval);
343                         logic [PtrW-1:0] decval_sub;
344                         logic [PtrW-1:0] decval_in;
345                         logic            unused_decval_msb;
346                     
347        1/1              decval_sub = (PtrW)'(Depth) - {1'b0, decval[PtrW-2:0]} - 1'b1;
           Tests:       T1 T2 T3 
348                     
349        1/1              decval_in = decval[PtrW-1] ? decval_sub : decval;
           Tests:       T1 T2 T3 
350                     
351                         // We do not care about the MSB, hence we mask it out
352        1/1              unused_decval_msb = decval_in[PtrW-1];
           Tests:       T1 T2 T3 
353        1/1              decval_in[PtrW-1] = 1'b0;
           Tests:       T1 T2 T3 
354                     
355                         // Perform the XOR conversion
356        1/1              dec2gray = decval_in;
           Tests:       T1 T2 T3 
357        1/1              dec2gray ^= (decval_in >> 1);
           Tests:       T1 T2 T3 
358                     
359                         // Override the MSB
360        1/1              dec2gray[PtrW-1] = decval[PtrW-1];
           Tests:       T1 T2 T3 
361                       endfunction
362                     
363                       // Algorithm walks up from 0..N-1 then flips the upper bit and walks down from N-1 to 0.
364                       function automatic [PtrW-1:0] gray2dec(input logic [PtrW-1:0] grayval);
365                         logic [PtrW-1:0] dec_tmp, dec_tmp_sub;
366                         logic            unused_decsub_msb;
367                     
368        1/1              dec_tmp = '0;
           Tests:       T1 T2 T3 
369        1/1              for (int i = PtrW-2; i >= 0; i--) begin
           Tests:       T1 T2 T3 
370        1/1                dec_tmp[i] = dec_tmp[i+1] ^ grayval[i];
           Tests:       T1 T2 T3 
371                         end
372        1/1              dec_tmp_sub = (PtrW)'(Depth) - dec_tmp - 1'b1;
           Tests:       T1 T2 T3 
373        1/1              if (grayval[PtrW-1]) begin
           Tests:       T1 T2 T3 
374        1/1                gray2dec = dec_tmp_sub;
           Tests:       T35 T116 T117 
375                           // Override MSB
376        1/1                gray2dec[PtrW-1] = 1'b1;
           Tests:       T35 T116 T117 
377        1/1                unused_decsub_msb = dec_tmp_sub[PtrW-1];
           Tests:       T35 T116 T117 
378                         end else begin
379        1/1                gray2dec = dec_tmp;
           Tests:       T1 T2 T3 

---

Cond Coverage for Instance : tb.dut.u_upload.u_addrfifo

	Total	Covered	Percent
Conditions	68	51	75.00
Logical	68	51	75.00
Non-Logical	0	0
Event	0	0

 LINE       121
 EXPRESSION (wvalid_i & wready_o)
             ----1---   ----2---

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Not Covered
1	1	Covered	T65,T68,T52

 LINE       153
 EXPRESSION ((w_wptr_p == w_rptr_p) ? (5'((w_wptr_v - w_rptr_v))) : (5'(({1'b1, w_wptr_v} - {1'b0, w_rptr_v}))))
             -----------1----------

-1-	Status	Tests
0	Covered	T35,T116,T117
1	Covered	T1,T2,T3

 LINE       153
 SUB-EXPRESSION (w_wptr_p == w_rptr_p)
                -----------1----------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       195
 EXPRESSION ((r_wptr_p == r_rptr_p) ? (5'((r_wptr_v - r_rptr_v))) : (5'(({1'b1, r_wptr_v} - {1'b0, r_rptr_v}))))
             -----------1----------

-1-	Status	Tests
0	Covered	T35,T116,T117
1	Covered	T1,T2,T3

 LINE       195
 SUB-EXPRESSION (r_wptr_p == r_rptr_p)
                -----------1----------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       211
 EXPRESSION (r_wptr == r_sram_rptr)
            -----------1-----------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       217
 EXPRESSION (w_wptr_q == (w_rptr ^ XorMask))
            ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Not Covered

 LINE       218
 EXPRESSION (r_wptr == (r_rptr_q ^ XorMask))
            ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Not Covered

 LINE       219
 EXPRESSION (r_wptr == r_rptr_q)
            ----------1---------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       247
 EXPRESSION (r_sram_req_o && r_sram_gnt_i)
             ------1-----    ------2-----

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Not Covered
1	1	Covered	T65,T68,T52

 LINE       248
 EXPRESSION (rvalid_o && rready_i)
             ----1---    ----2---

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T65,T68,T52
1	1	Covered	T65,T68,T52

 LINE       251
 EXPRESSION (wvalid_i && ((!w_full)))
             ----1---    -----2-----

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Not Covered
1	1	Covered	T65,T68,T52

 LINE       252
 EXPRESSION (((!w_full)) && w_sram_gnt_i)
             -----1-----    ------2-----

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T1,T2,T3
1	1	Covered	T65,T68,T52

 LINE       282
 EXPRESSION (((!r_sramrptr_empty)) && rfifo_ack)
             ----------1----------    ----2----

-1-	-2-	Status	Tests
0	1	Covered	T65,T68,T52
1	0	Not Covered
1	1	Not Covered

 LINE       287
 EXPRESSION (((!r_sramrptr_empty)) && ( ! (r_sram_rvalid_i ^ rfifo_ack) ))
             ----------1----------    -----------------2-----------------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Not Covered
1	1	Covered	T65,T68,T52

 LINE       287
 SUB-EXPRESSION ( ! (r_sram_rvalid_i ^ rfifo_ack) )
                    --------------1--------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T65,T68,T52

 LINE       287
 SUB-EXPRESSION (r_sram_rvalid_i ^ rfifo_ack)
                 -------1-------   ----2----

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Not Covered
1	0	Covered	T65,T68,T52
1	1	Not Covered

 LINE       291
 EXPRESSION (stored || r_sram_rvalid_i)
             ---1--    -------2-------

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T65,T68,T52
1	0	Covered	T65,T68,T52

 LINE       299
 EXPRESSION (r_sram_rvalid_i ? r_sram_rdata_i[0+:Width] : (32'(0)))
             -------1-------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T65,T68,T52

 LINE       301
 EXPRESSION (stored ? rdata_q : rdata_d)
             ---1--

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T65,T68,T52

 LINE       321
 EXPRESSION (r_sram_rvalid_i && ( ! (stored ^ rfifo_ack) ))
             -------1-------    -------------2------------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Not Covered
1	1	Covered	T65,T68,T52

 LINE       321
 SUB-EXPRESSION ( ! (stored ^ rfifo_ack) )
                    ----------1---------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T65,T68,T52

 LINE       321
 SUB-EXPRESSION (stored ^ rfifo_ack)
                 ---1--   ----2----

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Not Covered
1	0	Covered	T65,T68,T52
1	1	Covered	T65,T68,T52

 LINE       330
 EXPRESSION (((!r_sram_rvalid_i)) && rfifo_ack)
             ----------1---------    ----2----

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T1,T2,T3
1	1	Covered	T65,T68,T52

 LINE       349
 EXPRESSION (decval[(PtrW - 1)] ? decval_sub : decval)
             ---------1--------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T35,T116,T117

 LINE       370
 EXPRESSION (dec_tmp[(i + 1)] ^ grayval[i])
             --------1-------   -----2----

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T65,T68,T52
1	0	Covered	T52,T67,T53
1	1	Covered	T65,T68,T52

---

Branch Coverage for Instance : tb.dut.u_upload.u_addrfifo

	Line No.	Total	Covered	Percent
Branches		27	27	100.00
TERNARY	153	2	2	100.00
TERNARY	195	2	2	100.00
TERNARY	299	2	2	100.00
TERNARY	301	2	2	100.00
IF	126	3	3	100.00
IF	168	3	3	100.00
IF	204	3	3	100.00
IF	279	2	2	100.00
IF	324	4	4	100.00
TERNARY	349	2	2	100.00
IF	373	2	2	100.00

153          assign wdepth_o = (w_wptr_p == w_rptr_p)
                                                     
154                          ? DepthW'(w_wptr_v - w_rptr_v)
                             -1-  
                             ==>  
                             ==>  

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T35,T116,T117

195          assign rdepth_o = (r_wptr_p == r_rptr_p)
                                                     
196                          ? DepthW'(r_wptr_v - r_rptr_v)
                             -1-  
                             ==>  
                             ==>  

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T35,T116,T117

299          assign rdata_d = (r_sram_rvalid_i) ? r_sram_rdata_i[0+:Width] : Width'(0);
                                                -1-  
                                                ==>  
                                                ==>  

Branches:

-1-	Status	Tests
1	Covered	T65,T68,T52
0	Covered	T1,T2,T3

301          assign rdata_o = (stored) ? rdata_q : rdata_d;
                                       -1-  
                                       ==>  
                                       ==>  

Branches:

-1-	Status	Tests
1	Covered	T65,T68,T52
0	Covered	T1,T2,T3

126            if (!rst_wr_ni) begin
               -1-  
127              w_wptr_q      <= PtrW'(0);
                 ==>
128              w_wptr_gray_q <= PtrW'(0);
129            end else if (w_wptr_inc) begin
                        -2-  
130              w_wptr_q      <= w_wptr_d;
                 ==>
131              w_wptr_gray_q <= w_wptr_gray_d;
132            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T65,T68,T52
0	0	Covered	T4,T8,T10

168            if (!rst_rd_ni) begin
               -1-  
169              r_rptr_q      <= PtrW'(0);
                 ==>
170              r_rptr_gray_q <= PtrW'(0);
171            end else if (r_rptr_inc) begin
                        -2-  
172              r_rptr_q      <= r_rptr_d;
                 ==>
173              r_rptr_gray_q <= r_rptr_gray_d;
174            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T65,T68,T52
0	0	Covered	T1,T2,T3

204            if (!rst_rd_ni) begin
               -1-  
205              r_sram_rptr <= PtrW'(0);
                 ==>
206            end else if (r_sram_rptr_inc) begin
                        -2-  
207              r_sram_rptr <= r_sram_rptr + PtrW'(1);
                 ==>
208            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T65,T68,T52
0	0	Covered	T1,T2,T3

279            if (stored) begin
               -1-  
280              // storage has data. depends on rfifo_ack
281              // rfifo_ack can be replaced to rready_i as `rvalid_o` is 1
282              r_sram_req_o = !r_sramrptr_empty && rfifo_ack;
                 ==>
283            end else begin
284              // storage has no data.
285              // Can send request only when the reader accept the request or no
286              // previous request sent out.
287              r_sram_req_o = !r_sramrptr_empty && !(r_sram_rvalid_i ^ rfifo_ack);
                 ==>

Branches:

-1-	Status	Tests
1	Covered	T65,T68,T52
0	Covered	T1,T2,T3

324            if (!rst_rd_ni) begin
               -1-  
325              stored <= 1'b 0;
                 ==>
326              rdata_q <= Width'(0);
327            end else if (store_en) begin
                        -2-  
328              stored <= 1'b 1;
                 ==>
329              rdata_q <= rdata_d;
330            end else if (!r_sram_rvalid_i && rfifo_ack) begin
                        -3-                          
331              // No request sent, host reads the data
332              stored <= 1'b 0;
                 ==>
333              rdata_q <= Width'(0);
334            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	-3-	Status	Tests
1	-	-	Covered	T1,T2,T3
0	1	-	Covered	T65,T68,T52
0	0	1	Covered	T65,T68,T52
0	0	0	Covered	T1,T2,T3

349            decval_in = decval[PtrW-1] ? decval_sub : decval;
                                          -1-  
                                          ==>  
                                          ==>  

Branches:

-1-	Status	Tests
1	Covered	T35,T116,T117
0	Covered	T1,T2,T3

373            if (grayval[PtrW-1]) begin
               -1-  
374              gray2dec = dec_tmp_sub;
                 ==>
375              // Override MSB
376              gray2dec[PtrW-1] = 1'b1;
377              unused_decsub_msb = dec_tmp_sub[PtrW-1];
378            end else begin
379              gray2dec = dec_tmp;
                 ==>

Branches:

-1-	Status	Tests
1	Covered	T35,T116,T117
0	Covered	T1,T2,T3

---

Assert Coverage for Instance : tb.dut.u_upload.u_addrfifo

	Total	Attempted	Percent	Succeeded/Matched	Percent
Assertions	13	13	100.00	13	100.00
Cover properties	0	0		0
Cover sequences	0	0		0
Total	13	13	100.00	13	100.00

---

Assertion Details

Name	Attempts	Real Successes	Failures	Incomplete
MinDepth_A	976	976	0	0
NoRAckInEmpty_A	443673543	1826	0	0
NoWAckInFull_A	153142285	1826	0	0
ParamCheckDepth_A	976	976	0	0
RSramRvalidOneCycle_M	443673543	1826	0	0
RptrGrayOneBitAtATime_A	443673543	1826	0	0
RptrIncDataValid_A	443673543	1826	0	0
RptrIncrease_A	443673543	1826	0	0
SramRvalid_A	443673543	1826	0	0
WSramRvalid_A	153142285	153142285	0	0
WidthMatch_A	976	976	0	0
WptrGrayOneBitAtATime_A	153142285	1826	0	0
WptrIncrease_A	153142285	1826	0	0

MinDepth_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	976	976	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

NoRAckInEmpty_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	443673543	1826	0	0
T48	0	8	0	0
T52	0	5	0	0
T53	0	4	0	0
T65	47799	2	0	0
T67	0	3	0	0
T68	0	2	0	0
T83	10139	0	0	0
T84	54948	0	0	0
T86	2118	0	0	0
T87	32192	0	0	0
T102	0	7	0	0
T105	60913	0	0	0
T106	72111	0	0	0
T107	70654	0	0	0
T108	21070	0	0	0
T109	0	12	0	0
T113	10237	0	0	0
T114	0	4	0	0
T115	0	4	0	0

NoWAckInFull_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	153142285	1826	0	0
T48	0	8	0	0
T52	0	5	0	0
T53	0	4	0	0
T55	10608	0	0	0
T65	96046	2	0	0
T67	0	3	0	0
T68	0	2	0	0
T83	2160	0	0	0
T84	97023	0	0	0
T86	504	0	0	0
T87	14093	0	0	0
T102	0	7	0	0
T105	19116	0	0	0
T106	34284	0	0	0
T107	8448	0	0	0
T108	8214	0	0	0
T109	0	12	0	0
T114	0	4	0	0
T115	0	4	0	0

ParamCheckDepth_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	976	976	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

RSramRvalidOneCycle_M

Name	Attempts	Real Successes	Failures	Incomplete
Total	443673543	1826	0	0
T48	0	8	0	0
T52	0	5	0	0
T53	0	4	0	0
T65	47799	2	0	0
T67	0	3	0	0
T68	0	2	0	0
T83	10139	0	0	0
T84	54948	0	0	0
T86	2118	0	0	0
T87	32192	0	0	0
T102	0	7	0	0
T105	60913	0	0	0
T106	72111	0	0	0
T107	70654	0	0	0
T108	21070	0	0	0
T109	0	12	0	0
T113	10237	0	0	0
T114	0	4	0	0
T115	0	4	0	0

RptrGrayOneBitAtATime_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	443673543	1826	0	0
T48	0	8	0	0
T52	0	5	0	0
T53	0	4	0	0
T65	47799	2	0	0
T67	0	3	0	0
T68	0	2	0	0
T83	10139	0	0	0
T84	54948	0	0	0
T86	2118	0	0	0
T87	32192	0	0	0
T102	0	7	0	0
T105	60913	0	0	0
T106	72111	0	0	0
T107	70654	0	0	0
T108	21070	0	0	0
T109	0	12	0	0
T113	10237	0	0	0
T114	0	4	0	0
T115	0	4	0	0

RptrIncDataValid_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	443673543	1826	0	0
T48	0	8	0	0
T52	0	5	0	0
T53	0	4	0	0
T65	47799	2	0	0
T67	0	3	0	0
T68	0	2	0	0
T83	10139	0	0	0
T84	54948	0	0	0
T86	2118	0	0	0
T87	32192	0	0	0
T102	0	7	0	0
T105	60913	0	0	0
T106	72111	0	0	0
T107	70654	0	0	0
T108	21070	0	0	0
T109	0	12	0	0
T113	10237	0	0	0
T114	0	4	0	0
T115	0	4	0	0

RptrIncrease_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	443673543	1826	0	0
T48	0	8	0	0
T52	0	5	0	0
T53	0	4	0	0
T65	47799	2	0	0
T67	0	3	0	0
T68	0	2	0	0
T83	10139	0	0	0
T84	54948	0	0	0
T86	2118	0	0	0
T87	32192	0	0	0
T102	0	7	0	0
T105	60913	0	0	0
T106	72111	0	0	0
T107	70654	0	0	0
T108	21070	0	0	0
T109	0	12	0	0
T113	10237	0	0	0
T114	0	4	0	0
T115	0	4	0	0

SramRvalid_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	443673543	1826	0	0
T48	0	8	0	0
T52	0	5	0	0
T53	0	4	0	0
T65	47799	2	0	0
T67	0	3	0	0
T68	0	2	0	0
T83	10139	0	0	0
T84	54948	0	0	0
T86	2118	0	0	0
T87	32192	0	0	0
T102	0	7	0	0
T105	60913	0	0	0
T106	72111	0	0	0
T107	70654	0	0	0
T108	21070	0	0	0
T109	0	12	0	0
T113	10237	0	0	0
T114	0	4	0	0
T115	0	4	0	0

WSramRvalid_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	153142285	153142285	0	0
T4	749	749	0	0
T8	504	504	0	0
T10	1399	1399	0	0
T11	4313	4313	0	0
T13	15838	15838	0	0
T15	17941	17941	0	0
T16	56586	56586	0	0
T17	216	216	0	0
T18	18636	18636	0	0
T19	125490	125490	0	0

WidthMatch_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	976	976	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

WptrGrayOneBitAtATime_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	153142285	1826	0	0
T48	0	8	0	0
T52	0	5	0	0
T53	0	4	0	0
T55	10608	0	0	0
T65	96046	2	0	0
T67	0	3	0	0
T68	0	2	0	0
T83	2160	0	0	0
T84	97023	0	0	0
T86	504	0	0	0
T87	14093	0	0	0
T102	0	7	0	0
T105	19116	0	0	0
T106	34284	0	0	0
T107	8448	0	0	0
T108	8214	0	0	0
T109	0	12	0	0
T114	0	4	0	0
T115	0	4	0	0

WptrIncrease_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	153142285	1826	0	0
T48	0	8	0	0
T52	0	5	0	0
T53	0	4	0	0
T55	10608	0	0	0
T65	96046	2	0	0
T67	0	3	0	0
T68	0	2	0	0
T83	2160	0	0	0
T84	97023	0	0	0
T86	504	0	0	0
T87	14093	0	0	0
T102	0	7	0	0
T105	19116	0	0	0
T106	34284	0	0	0
T107	8448	0	0	0
T108	8214	0	0	0
T109	0	12	0	0
T114	0	4	0	0
T115	0	4	0	0