Unified Coverage Report :: Module :: prim_sha2_pad

Module : prim_sha2_pad

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
84.98	96.12	91.61		66.67	85.53

Source File(s) :
/workspaces/repo/scratch/os_regression_2024_08_22/hmac-sim-vcs/default/sim-vcs/../src/lowrisc_prim_sha2_0/rtl/prim_sha2_pad.sv

Module self-instances :

NAME	SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
tb.dut.u_prim_sha2_512.gen_multimode_logic.u_prim_sha2_multimode.u_pad	93.70	96.12	94.93		90.91	92.86

---

Module Instance : tb.dut.u_prim_sha2_512.gen_multimode_logic.u_prim_sha2_multimode.u_pad

Instance :

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
93.70	96.12	94.93		90.91	92.86

Instance's subtree :

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
93.70	96.12	94.93		90.91	92.86

Parent :

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT	NAME
99.12	100.00	97.87		100.00	98.59		gen_multimode_logic.u_prim_sha2_multimode

Subtrees :

NAME	SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
no children

Line Coverage for Module : prim_sha2_pad

	Line No.	Total	Covered	Percent
TOTAL		129	124	96.12
CONT_ASSIGN	48	1	1	100.00
CONT_ASSIGN	56	1	1	100.00
CONT_ASSIGN	60	1	1	100.00
CONT_ASSIGN	67	1	1	100.00
CONT_ASSIGN	72	1	1	100.00
CONT_ASSIGN	76	1	1	100.00
ALWAYS	81	5	5	100.00
ALWAYS	101	23	22	95.65
ALWAYS	190	3	3	100.00
ALWAYS	196	74	70	94.59
ALWAYS	346	10	10	100.00
ALWAYS	364	3	3	100.00
CONT_ASSIGN	368	1	1	100.00
ALWAYS	373	3	3	100.00
CONT_ASSIGN	378	1	1	100.00

47                        // to hash.
48         1/1            assign hash_go = hash_start_i | hash_continue_i;
           Tests:       T1 T2 T3 
49                      
50                        // tie off unused inport ports and signals
51                        if (!MultimodeEn) begin : gen_tie_unused
52                          logic unused_signals;
53                          assign unused_signals = ^{message_length_i[127:64]};
54                        end
55                      
56         1/1            assign fifo_partial = MultimodeEn ? ~&fifo_rdata_i.mask :
           Tests:       T1 T2 T3 
57                                                            ~&fifo_rdata_i.mask[3:0];
58                      
59                        // tx_count[8:0] == 'h1c0 --> should send LenHi
60         1/1            assign txcnt_eq_1a0 = (digest_mode_flag_q == SHA2_256   || ~MultimodeEn)               ?
           Tests:       T1 T2 T3 
61                                                                                              (tx_count[8:0] == 9'h1a0)  :
62                                              ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ?
63                                                                                              (tx_count[9:0] == 10'h340) :
64                                                                                              '0;
65                      
66                        if (MultimodeEn) begin : gen_txcnt_comp_multimode
67         1/1              assign txcnt_eq_msg_len = (tx_count == message_length_i);
           Tests:       T1 T2 T3 
68                        end else begin : gen_txcnt_comp_no_multimode
69                          assign txcnt_eq_msg_len = (tx_count[63:0] == message_length_i[63:0]);
70                        end
71                      
72         1/1            assign hash_stop_flag_d = (~sha_en_i || hash_go || hash_done_i) ? 1'b0 :
           Tests:       T1 T2 T3 
73                                                  hash_stop_i                           ? 1'b1 :
74                                                                                          hash_stop_flag_q;
75                      
76         1/1            assign hash_process_flag_d = (~sha_en_i || hash_go || hash_done_i) ? 1'b0 :
           Tests:       T1 T2 T3 
77                                                     hash_process_i                        ? 1'b1 :
78                                                                                             hash_process_flag_q;
79                      
80                        always_ff @(posedge clk_i or negedge rst_ni) begin
81         1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
82         1/1                hash_stop_flag_q    <= 1'b0;
           Tests:       T1 T2 T3 
83         1/1                hash_process_flag_q <= 1'b0;
           Tests:       T1 T2 T3 
84                          end else begin
85         1/1                hash_stop_flag_q    <= hash_stop_flag_d;
           Tests:       T1 T2 T3 
86         1/1                hash_process_flag_q <= hash_process_flag_d;
           Tests:       T1 T2 T3 
87                          end
88                        end
89                      
90                        // data path: fout_wdata
91                        typedef enum logic [2:0] {
92                          FifoIn,         // fin_wdata, fin_wstrb
93                          Pad80,          // {8'h80, 8'h00} , strb (calc based on len[4:3])
94                          Pad00,          // 32'h0, full strb
95                          LenHi,          // len[63:32], full strb
96                          LenLo           // len[31:0], full strb
97                        } sel_data_e;
98                        sel_data_e sel_data;
99                      
100                       always_comb begin
101        1/1              unique case (sel_data)
           Tests:       T1 T2 T3 
102                           FifoIn: begin
103        1/1                  shaf_rdata_o = fifo_rdata_i.data;
           Tests:       T1 T2 T3 
104                           end
105                     
106                           Pad80: begin
107                             // {a[7:0], b[7:0], c[7:0], d[7:0]}
108                             // msglen[4:3] == 00 |-> {'h80, 'h00, 'h00, 'h00}
109                             // msglen[4:3] == 01 |-> {msg,  'h80, 'h00, 'h00}
110                             // msglen[4:3] == 10 |-> {msg[15:0],  'h80, 'h00}
111                             // msglen[4:3] == 11 |-> {msg[23:0],        'h80}
112        1/1                  if ((digest_mode_flag_q == SHA2_256) || ~MultimodeEn) begin
           Tests:       T1 T2 T4 
113        1/1                    unique case (message_length_i[4:3])
           Tests:       T1 T2 T4 
114        1/1                      2'b 00:  shaf_rdata_o = 64'h 0000_0000_8000_0000;
           Tests:       T1 T4 T6 
115        1/1                      2'b 01:  shaf_rdata_o = {32'h 0000_0000, fifo_rdata_i.data[31:24], 24'h 8000_00};
           Tests:       T1 T2 T4 
116        1/1                      2'b 10:  shaf_rdata_o = {32'h 0000_0000, fifo_rdata_i.data[31:16], 16'h 8000};
           Tests:       T2 T7 T8 
117        1/1                      2'b 11:  shaf_rdata_o = {32'h 0000_0000, fifo_rdata_i.data[31: 8],  8'h 80};
           Tests:       T1 T4 T6 
118                                 default: shaf_rdata_o = 64'h0;
119                               endcase
120        1/1                  end else if ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) begin
           Tests:       T1 T2 T4 
121        1/1                    unique case (message_length_i[5:3])
           Tests:       T1 T2 T4 
122        1/1                      3'b 000: shaf_rdata_o = 64'h 8000_0000_0000_0000;
           Tests:       T1 T2 T4 
123        1/1                      3'b 001: shaf_rdata_o = {fifo_rdata_i.data[63:56], 56'h 8000_0000_0000_00};
           Tests:       T1 T2 T4 
124        1/1                      3'b 010: shaf_rdata_o = {fifo_rdata_i.data[63:48], 48'h 8000_0000_0000};
           Tests:       T5 T18 T7 
125        1/1                      3'b 011: shaf_rdata_o = {fifo_rdata_i.data[63:40], 40'h 8000_0000_00};
           Tests:       T4 T18 T7 
126        1/1                      3'b 100: shaf_rdata_o = {fifo_rdata_i.data[63:32], 32'h 8000_0000};
           Tests:       T7 T8 T20 
127        1/1                      3'b 101: shaf_rdata_o = {fifo_rdata_i.data[63:24], 24'h 8000_00};
           Tests:       T2 T4 T6 
128        1/1                      3'b 110: shaf_rdata_o = {fifo_rdata_i.data[63:16], 16'h 8000};
           Tests:       T18 T7 T21 
129        1/1                      3'b 111: shaf_rdata_o = {fifo_rdata_i.data[63:8],  8'h 80};
           Tests:       T1 T4 T22 
130                                 default: shaf_rdata_o = 64'h0;
131                               endcase
132                             end else
133        0/1     ==>              shaf_rdata_o = '0;
134                           end
135                     
136                           Pad00: begin
137        1/1                  shaf_rdata_o = '0;
           Tests:       T1 T2 T4 
138                           end
139                     
140                           LenHi: begin
141        1/1                  shaf_rdata_o = ((digest_mode_flag_q == SHA2_256) || ~MultimodeEn) ?
           Tests:       T1 T2 T4 
142                                                                          {32'b0, message_length_i[63:32]}:
143                                            ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ?
144                                                                          message_length_i[127:64] : '0;
145                           end
146                     
147                           LenLo: begin
148        1/1                  shaf_rdata_o = ((digest_mode_flag_q == SHA2_256) || ~MultimodeEn) ?
           Tests:       T1 T2 T4 
149                                                                          {32'b0, message_length_i[31:0]}:
150                                            ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ?
151                                                                          message_length_i[63:0]: '0;
152                           end
153                     
154                           default: begin
155                             shaf_rdata_o = '0;
156                           end
157                         endcase
158                     
159        1/1(1 unreachable)      if (!MultimodeEn) shaf_rdata_o [63:32] = 32'b0; // assign most sig 32 bits to constant 0
           Tests:       T1 T2 T3 
                        MISSING_ELSE
160                       end
161                     
162                       // Padded length
163                       // $ceil(message_length_i + 8 + 64, 512) -> message_length_i [8:0] + 440 and ignore carry
164                       //assign length_added = (message_length_i[8:0] + 9'h1b8) ;
165                     
166                       // fifo control
167                       // add 8'h 80 , N 8'h00, 64'h message_length_i
168                     
169                       // Steps
170                       // 1. `hash_start_i` from CPU (or DMA?)
171                       // 2. calculate `padded_length` from `message_length_i`
172                       // 3. Check if tx_count == message_length_i, then go to 5
173                       // 4. Receiving FIFO input (hand over to fifo output)
174                       // 5. Padding bit 1 (8'h80) followed by 8'h00 if needed
175                       // 6. Padding with length (high -> low)
176                     
177                       // State Machine
178                       typedef enum logic [2:0] {
179                         StIdle,        // fin_full to prevent unwanted FIFO write
180                         StFifoReceive, // Check tx_count == message_length_i
181                         StPad80,       // 8'h 80 + 8'h 00 X N
182                         StPad00,
183                         StLenHi,
184                         StLenLo
185                       } pad_st_e;
186                     
187                       pad_st_e st_q, st_d;
188                     
189                       always_ff @(posedge clk_i or negedge rst_ni) begin
190        2/2              if (!rst_ni) st_q <= StIdle;
           Tests:       T1 T2 T3  | T1 T2 T3 
191        1/1              else         st_q <= st_d;
           Tests:       T1 T2 T3 
192                       end
193                     
194                       // Next state
195                       always_comb begin
196        1/1              shaf_rvalid_o = 1'b0;
           Tests:       T1 T2 T3 
197        1/1              inc_txcount   = 1'b0;
           Tests:       T1 T2 T3 
198        1/1              sel_data      = FifoIn;
           Tests:       T1 T2 T3 
199        1/1              fifo_rready_o = 1'b0;
           Tests:       T1 T2 T3 
200        1/1              st_d          = StIdle;
           Tests:       T1 T2 T3 
201                     
202        1/1              unique case (st_q)
           Tests:       T1 T2 T3 
203                           StIdle: begin
204        1/1                  sel_data      = FifoIn;
           Tests:       T1 T2 T3 
205        1/1                  shaf_rvalid_o = 1'b0;
           Tests:       T1 T2 T3 
206        1/1                  if (sha_en_i && hash_go) begin
           Tests:       T1 T2 T3 
207        1/1                    inc_txcount = 1'b0;
           Tests:       T1 T2 T4 
208        1/1                    st_d        = StFifoReceive;
           Tests:       T1 T2 T4 
209                             end else begin
210        1/1                    st_d        = StIdle;
           Tests:       T1 T2 T3 
211                             end
212                           end
213                     
214                           StFifoReceive: begin
215        1/1                  sel_data = FifoIn;
           Tests:       T1 T2 T4 
216        1/1                  if (fifo_partial && fifo_rvalid_i) begin
           Tests:       T1 T2 T4 
217                               // End of the message (last bit is not word-aligned) , assume hash_process_flag is set
218        1/1                    shaf_rvalid_o = 1'b0; // Update entry at StPad80
           Tests:       T1 T2 T4 
219        1/1                    inc_txcount   = 1'b0;
           Tests:       T1 T2 T4 
220        1/1                    fifo_rready_o = 1'b0;
           Tests:       T1 T2 T4 
221        1/1                    st_d = StPad80;
           Tests:       T1 T2 T4 
222        1/1                  end else if (!hash_process_flag_q) begin
           Tests:       T1 T2 T4 
223        1/1                    fifo_rready_o = shaf_rready_i;
           Tests:       T1 T2 T4 
224        1/1                    shaf_rvalid_o = fifo_rvalid_i;
           Tests:       T1 T2 T4 
225        1/1                    inc_txcount   = shaf_rready_i;
           Tests:       T1 T2 T4 
226        1/1                    st_d = StFifoReceive;
           Tests:       T1 T2 T4 
227        1/1                  end else if (txcnt_eq_msg_len) begin
           Tests:       T1 T2 T4 
228                               // already received all msg and was waiting process flag
229        1/1                    shaf_rvalid_o = 1'b0;
           Tests:       T1 T2 T4 
230        1/1                    inc_txcount   = 1'b0;
           Tests:       T1 T2 T4 
231        1/1                    fifo_rready_o = 1'b0;
           Tests:       T1 T2 T4 
232        1/1                    st_d = StPad80;
           Tests:       T1 T2 T4 
233                             end else begin
234        1/1                    shaf_rvalid_o = fifo_rvalid_i;
           Tests:       T1 T5 T6 
235        1/1                    fifo_rready_o = shaf_rready_i; // 0 always
           Tests:       T1 T5 T6 
236        1/1                    inc_txcount   = shaf_rready_i; // 0 always
           Tests:       T1 T5 T6 
237        1/1                    st_d = StFifoReceive;
           Tests:       T1 T5 T6 
238                             end
239                     
240        1/1                  if (txcnt_eq_msg_len && hash_stop_flag_q) begin
           Tests:       T1 T2 T4 
241        1/1                    shaf_rvalid_o = 1'b0;
           Tests:       T2 T4 T5 
242        1/1                    inc_txcount   = 1'b0;
           Tests:       T2 T4 T5 
243        1/1                    fifo_rready_o = 1'b0;
           Tests:       T2 T4 T5 
244        1/1                    st_d = StIdle;
           Tests:       T2 T4 T5 
245                             end
                        MISSING_ELSE
246                           end
247                     
248                           StPad80: begin
249        1/1                  sel_data      = Pad80;
           Tests:       T1 T2 T4 
250        1/1                  shaf_rvalid_o = 1'b1;
           Tests:       T1 T2 T4 
251        1/1                  fifo_rready_o = (digest_mode_flag_q == SHA2_256 || ~MultimodeEn) ?
           Tests:       T1 T2 T4 
252                                             shaf_rready_i && |message_length_i[4:3] :
253                                             ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ?
254                                             shaf_rready_i && |message_length_i[5:3] : '0; // Only when partial
255                     
256                             // exactly 192 bits left, do not need to pad00's
257        1/1                  if (shaf_rready_i && txcnt_eq_1a0) begin
           Tests:       T1 T2 T4 
258        1/1                    st_d        = StLenHi;
           Tests:       T6 T18 T7 
259        1/1                    inc_txcount = 1'b1;
           Tests:       T6 T18 T7 
260                             // it does not matter if value is < or > than 416 bits.  If it's the former, 00 pad until
261                             // length field.  If >, then the next chunk will contain the length field with appropriate
262                             // 0 padding.
263        1/1                  end else if (shaf_rready_i && !txcnt_eq_1a0) begin
           Tests:       T1 T2 T4 
264        1/1                    st_d        = StPad00;
           Tests:       T1 T2 T4 
265        1/1                    inc_txcount = 1'b1;
           Tests:       T1 T2 T4 
266                             end else begin
267        1/1                    st_d        = StPad80;
           Tests:       T1 T4 T19 
268        1/1                    inc_txcount = 1'b0;
           Tests:       T1 T4 T19 
269                             end
270                     
271                             // # Below part is temporal code to speed up the SHA by 16 clocks per chunk
272                             // # (80 clk --> 64 clk)
273                             // # leaving this as a reference but needs to verify it.
274                             //if (shaf_rready_i && !txcnt_eq_1a0) begin
275                             //  st_d = StPad00;
276                             //
277                             //  inc_txcount = 1'b1;
278                             //  shaf_rvalid_o = (msg_word_aligned) ? 1'b1 : fifo_rvalid;
279                             //  fifo_rready = (msg_word_aligned) ? 1'b0 : 1'b1;
280                             //end else if (!shaf_rready_i && !txcnt_eq_1a0) begin
281                             //  st_d = StPad80;
282                             //
283                             //  inc_txcount = 1'b0;
284                             //  shaf_rvalid_o = (msg_word_aligned) ? 1'b1 : fifo_rvalid;
285                             //
286                             //end else if (shaf_rready_i && txcnt_eq_1a0) begin
287                             //  st_d = StLenHi;
288                             //  inc_txcount = 1'b1;
289                             //end else begin
290                             //  // !shaf_rready_i && txcnt_eq_1a0 , just wait until fifo_rready asserted
291                             //  st_d = StPad80;
292                             //  inc_txcount = 1'b0;
293                             //end
294                           end
295                     
296                           StPad00: begin
297        1/1                  sel_data      = Pad00;
           Tests:       T1 T2 T4 
298        1/1                  shaf_rvalid_o = 1'b1;
           Tests:       T1 T2 T4 
299                     
300        1/1                  if (shaf_rready_i) begin
           Tests:       T1 T2 T4 
301        1/1                    inc_txcount = 1'b1;
           Tests:       T1 T2 T4 
302        2/2                    if (txcnt_eq_1a0) st_d = StLenHi;
           Tests:       T1 T2 T4  | T1 T2 T4 
303        1/1                    else              st_d = StPad00;
           Tests:       T1 T2 T4 
304                             end else begin
305        1/1                    st_d = StPad00;
           Tests:       T1 T2 T4 
306                             end
307                           end
308                     
309                           StLenHi: begin
310        1/1                  sel_data      = LenHi;
           Tests:       T1 T2 T4 
311        1/1                  shaf_rvalid_o = 1'b1;
           Tests:       T1 T2 T4 
312                     
313        1/1                  if (shaf_rready_i) begin
           Tests:       T1 T2 T4 
314        1/1                    st_d = StLenLo;
           Tests:       T1 T2 T4 
315        1/1                    inc_txcount = 1'b1;
           Tests:       T1 T2 T4 
316                             end else begin
317        0/1     ==>            st_d = StLenHi;
318        0/1     ==>            inc_txcount = 1'b0;
319                             end
320                           end
321                     
322                           StLenLo: begin
323        1/1                  sel_data        = LenLo;
           Tests:       T1 T2 T4 
324        1/1                  shaf_rvalid_o   = 1'b1;
           Tests:       T1 T2 T4 
325                     
326        1/1                  if (shaf_rready_i) begin
           Tests:       T1 T2 T4 
327        1/1                    st_d        = StIdle;
           Tests:       T1 T2 T4 
328        1/1                    inc_txcount = 1'b1;
           Tests:       T1 T2 T4 
329                             end else begin
330        0/1     ==>            st_d        = StLenLo;
331        0/1     ==>            inc_txcount = 1'b0;
332                             end
333                           end
334                     
335                           default: begin
336                             st_d = StIdle;
337                           end
338                         endcase
339                     
340        2/2              if (!sha_en_i)    st_d = StIdle;
           Tests:       T1 T2 T3  | T1 T2 T3 
341        2/2              else if (hash_go) st_d = StFifoReceive;
           Tests:       T1 T2 T3  | T1 T2 T4 
                        MISSING_ELSE
342                       end
343                     
344                       // tx_count
345                       always_comb begin
346        1/1              tx_count_d = tx_count;
           Tests:       T1 T2 T3 
347                     
348        1/1              if (hash_start_i) begin
           Tests:       T1 T2 T3 
349                           // When starting a fresh hash, initialize the data counter to zero.
350        1/1                tx_count_d = '0;
           Tests:       T1 T2 T4 
351        1/1              end else if (hash_continue_i) begin
           Tests:       T1 T2 T3 
352                           // When continuing to hash, set the data counter to the current message length.
353        1/1                tx_count_d = message_length_i;
           Tests:       T2 T4 T5 
354        1/1              end else if (inc_txcount) begin
           Tests:       T1 T2 T3 
355        1/1                if ((digest_mode_flag_q == SHA2_256) || !MultimodeEn) begin
           Tests:       T1 T2 T4 
356        1/1                  tx_count_d[127:5] = tx_count[127:5] + 1'b1;
           Tests:       T1 T2 T4 
357        1/1                end else if ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) begin
           Tests:       T1 T2 T4 
358        1/1                  tx_count_d[127:6] = tx_count[127:6] + 1'b1;
           Tests:       T1 T2 T4 
359                           end
                   ==>  MISSING_ELSE
360                         end
                        MISSING_ELSE
361                       end
362                     
363                       always_ff @(posedge clk_i or negedge rst_ni) begin
364        2/2              if (!rst_ni) tx_count <= '0;
           Tests:       T1 T2 T3  | T1 T2 T3 
365        1/1              else         tx_count <= tx_count_d;
           Tests:       T1 T2 T3 
366                       end
367                     
368        1/1            assign digest_mode_flag_d = (hash_start_i || hash_continue_i) ? digest_mode_i  :    // set config
           Tests:       T1 T2 T3 
369                                                   hash_done_i                       ? SHA2_None      :    // clear
370                                                                                       digest_mode_flag_q; // keep
371                     
372                       always_ff @(posedge clk_i or negedge rst_ni) begin
373        2/2              if (!rst_ni)  digest_mode_flag_q <= SHA2_None;
           Tests:       T1 T2 T3  | T1 T2 T3 
374        1/1              else          digest_mode_flag_q <= digest_mode_flag_d;
           Tests:       T1 T2 T3 
375                       end
376                     
377                       // State machine is in Idle only when it meets tx_count == message length
378        1/1            assign msg_feed_complete_o = (hash_process_flag_q || hash_stop_flag_q) && (st_q == StIdle);
           Tests:       T1 T2 T3 

---

Cond Coverage for Module : prim_sha2_pad

	Total	Covered	Percent
Conditions	143	131	91.61
Logical	143	131	91.61
Non-Logical	0	0
Event	0	0

 LINE       48
 EXPRESSION (hash_start_i | hash_continue_i)
             ------1-----   -------2-------

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T2,T4,T5
1	0	Covered	T1,T2,T4

 LINE       60
 EXPRESSION 
 Number  Term
      1  ((digest_mode_flag_q == SHA2_256) || ((~MultimodeEn))) ? (tx_count[8:0] == 9'h1a0) : (((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ? (tx_count[9:0] == 10'h340) : '0))

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T4

 LINE       60
 SUB-EXPRESSION ((digest_mode_flag_q == SHA2_256) || ((~MultimodeEn)))
                 ----------------1---------------    --------2-------

-1-	-2-	Status	Tests
0	-	Covered	T1,T2,T3
1	-	Covered	T1,T2,T4

 LINE       60
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_256)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T4

 LINE       60
 SUB-EXPRESSION (tx_count[8:0] == 9'h1a0)
                ------------1------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       60
 SUB-EXPRESSION (((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ? (tx_count[9:0] == 10'h340) : '0)
                 -----------------------------------1----------------------------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T4

 LINE       60
 SUB-EXPRESSION ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512))
                 ----------------1---------------    ----------------2---------------

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T1,T2,T4
1	0	Covered	T1,T2,T4

 LINE       60
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_384)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T4

 LINE       60
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_512)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T4

 LINE       60
 SUB-EXPRESSION (tx_count[9:0] == 10'h340)
                -------------1------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       67
 EXPRESSION (tx_count == message_length_i)
            ---------------1--------------

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

 LINE       72
 EXPRESSION ((((~sha_en_i)) || hash_go || hash_done_i) ? 1'b0 : (hash_stop_i ? 1'b1 : hash_stop_flag_q))
             --------------------1--------------------

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

 LINE       72
 SUB-EXPRESSION (((~sha_en_i)) || hash_go || hash_done_i)
                 ------1------    ---2---    -----3-----

-1-	-2-	-3-	Status	Tests
0	0	0	Covered	T1,T2,T3
0	0	1	Covered	T1,T2,T4
0	1	0	Covered	T1,T2,T4
1	0	0	Covered	T1,T2,T3

 LINE       72
 SUB-EXPRESSION (hash_stop_i ? 1'b1 : hash_stop_flag_q)
                 -----1-----

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T2,T4,T5

 LINE       76
 EXPRESSION ((((~sha_en_i)) || hash_go || hash_done_i) ? 1'b0 : (hash_process_i ? 1'b1 : hash_process_flag_q))
             --------------------1--------------------

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

 LINE       76
 SUB-EXPRESSION (((~sha_en_i)) || hash_go || hash_done_i)
                 ------1------    ---2---    -----3-----

-1-	-2-	-3-	Status	Tests
0	0	0	Covered	T1,T2,T3
0	0	1	Covered	T1,T2,T4
0	1	0	Covered	T1,T2,T4
1	0	0	Covered	T1,T2,T3

 LINE       76
 SUB-EXPRESSION (hash_process_i ? 1'b1 : hash_process_flag_q)
                 -------1------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T4

 LINE       112
 EXPRESSION ((digest_mode_flag_q == SHA2_256) || ((~MultimodeEn)))
             ----------------1---------------    --------2-------

-1-	-2-	Status	Tests
0	-	Covered	T1,T2,T4
1	-	Covered	T1,T2,T4

 LINE       112
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_256)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       120
 EXPRESSION ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512))
             ----------------1---------------    ----------------2---------------

-1-	-2-	Status	Tests
0	0	Not Covered
0	1	Covered	T1,T2,T4
1	0	Covered	T1,T2,T4

 LINE       120
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_384)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       120
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_512)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       141
 EXPRESSION 
 Number  Term
      1  ((digest_mode_flag_q == SHA2_256) || ((~MultimodeEn))) ? ({32'b0, message_length_i[63:32]}) : (((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ? message_length_i[127:64] : '0))

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       141
 SUB-EXPRESSION ((digest_mode_flag_q == SHA2_256) || ((~MultimodeEn)))
                 ----------------1---------------    --------2-------

-1-	-2-	Status	Tests
0	-	Covered	T1,T2,T4
1	-	Covered	T1,T2,T4

 LINE       141
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_256)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       141
 SUB-EXPRESSION (((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ? message_length_i[127:64] : '0)
                 -----------------------------------1----------------------------------

-1-	Status	Tests
0	Not Covered
1	Covered	T1,T2,T4

 LINE       141
 SUB-EXPRESSION ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512))
                 ----------------1---------------    ----------------2---------------

-1-	-2-	Status	Tests
0	0	Not Covered
0	1	Covered	T1,T2,T4
1	0	Covered	T1,T2,T4

 LINE       141
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_384)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       141
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_512)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       148
 EXPRESSION 
 Number  Term
      1  ((digest_mode_flag_q == SHA2_256) || ((~MultimodeEn))) ? ({32'b0, message_length_i[31:0]}) : (((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ? message_length_i[63:0] : '0))

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       148
 SUB-EXPRESSION ((digest_mode_flag_q == SHA2_256) || ((~MultimodeEn)))
                 ----------------1---------------    --------2-------

-1-	-2-	Status	Tests
0	-	Covered	T1,T2,T4
1	-	Covered	T1,T2,T4

 LINE       148
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_256)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       148
 SUB-EXPRESSION (((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ? message_length_i[63:0] : '0)
                 -----------------------------------1----------------------------------

-1-	Status	Tests
0	Not Covered
1	Covered	T1,T2,T4

 LINE       148
 SUB-EXPRESSION ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512))
                 ----------------1---------------    ----------------2---------------

-1-	-2-	Status	Tests
0	0	Not Covered
0	1	Covered	T1,T2,T4
1	0	Covered	T1,T2,T4

 LINE       148
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_384)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       148
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_512)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       206
 EXPRESSION (sha_en_i && hash_go)
             ----1---    ---2---

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T1,T2,T3
1	1	Covered	T1,T2,T4

 LINE       216
 EXPRESSION (fifo_partial && fifo_rvalid_i)
             ------1-----    ------2------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T4
1	0	Covered	T1,T2,T4
1	1	Covered	T1,T2,T4

 LINE       240
 EXPRESSION (txcnt_eq_msg_len && hash_stop_flag_q)
             --------1-------    --------2-------

-1-	-2-	Status	Tests
0	1	Covered	T8,T23,T24
1	0	Covered	T1,T2,T4
1	1	Covered	T2,T4,T5

 LINE       251
 EXPRESSION 
 Number  Term
      1  ((digest_mode_flag_q == SHA2_256) || ((~MultimodeEn))) ? (shaf_rready_i && ((|message_length_i[4:3]))) : (((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ? (shaf_rready_i && ((|message_length_i[5:3]))) : '0))

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       251
 SUB-EXPRESSION ((digest_mode_flag_q == SHA2_256) || ((~MultimodeEn)))
                 ----------------1---------------    --------2-------

-1-	-2-	Status	Tests
0	-	Covered	T1,T2,T4
1	-	Covered	T1,T2,T4

 LINE       251
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_256)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       251
 SUB-EXPRESSION (shaf_rready_i && ((|message_length_i[4:3])))
                 ------1------    -------------2------------

-1-	-2-	Status	Tests
0	1	Covered	T7,T9,T21
1	0	Covered	T1,T4,T6
1	1	Covered	T1,T2,T4

 LINE       251
 SUB-EXPRESSION (((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ? (shaf_rready_i && ((|message_length_i[5:3]))) : '0)
                 -----------------------------------1----------------------------------

-1-	Status	Tests
0	Not Covered
1	Covered	T1,T2,T4

 LINE       251
 SUB-EXPRESSION ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512))
                 ----------------1---------------    ----------------2---------------

-1-	-2-	Status	Tests
0	0	Not Covered
0	1	Covered	T1,T2,T4
1	0	Covered	T1,T2,T4

 LINE       251
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_384)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       251
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_512)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       251
 SUB-EXPRESSION (shaf_rready_i && ((|message_length_i[5:3])))
                 ------1------    -------------2------------

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T1,T2,T4
1	1	Covered	T1,T2,T4

 LINE       257
 EXPRESSION (shaf_rready_i && txcnt_eq_1a0)
             ------1------    ------2-----

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T1,T2,T4
1	1	Covered	T6,T18,T7

 LINE       263
 EXPRESSION (shaf_rready_i && ((!txcnt_eq_1a0)))
             ------1------    --------2--------

-1-	-2-	Status	Tests
0	1	Covered	T1,T4,T19
1	0	Not Covered
1	1	Covered	T1,T2,T4

 LINE       355
 EXPRESSION ((digest_mode_flag_q == SHA2_256) || ((!MultimodeEn)))
             ----------------1---------------    --------2-------

-1-	-2-	Status	Tests
0	-	Covered	T1,T2,T4
1	-	Covered	T1,T2,T4

 LINE       355
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_256)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       357
 EXPRESSION ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512))
             ----------------1---------------    ----------------2---------------

-1-	-2-	Status	Tests
0	0	Not Covered
0	1	Covered	T1,T2,T4
1	0	Covered	T1,T2,T4

 LINE       357
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_384)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       357
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_512)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       368
 EXPRESSION ((hash_start_i || hash_continue_i) ? digest_mode_i : (hash_done_i ? SHA2_None : digest_mode_flag_q))
             ----------------1----------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T4

 LINE       368
 SUB-EXPRESSION (hash_start_i || hash_continue_i)
                 ------1-----    -------2-------

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T2,T4,T5
1	0	Covered	T1,T2,T4

 LINE       368
 SUB-EXPRESSION (hash_done_i ? SHA2_None : digest_mode_flag_q)
                 -----1-----

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T4

 LINE       378
 EXPRESSION ((hash_process_flag_q || hash_stop_flag_q) && (st_q == StIdle))
             --------------------1--------------------    --------2-------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Covered	T1,T2,T4
1	1	Covered	T1,T2,T4

 LINE       378
 SUB-EXPRESSION (hash_process_flag_q || hash_stop_flag_q)
                 ---------1---------    --------2-------

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T2,T4,T5
1	0	Covered	T1,T2,T4

 LINE       378
 SUB-EXPRESSION (st_q == StIdle)
                --------1-------

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

---

FSM Coverage for Module : prim_sha2_pad

Summary for FSM :: st_q

	Total	Covered	Percent
States	6	6	100.00	(Not included in score)
Transitions	15	10	66.67
Sequences	0	0

State, Transition and Sequence Details for FSM :: st_q

---

states	Line No.	Covered	Tests
StFifoReceive	208	Covered	T1,T2,T4
StIdle	200	Covered	T1,T2,T3
StLenHi	258	Covered	T1,T2,T4
StLenLo	314	Covered	T1,T2,T4
StPad00	264	Covered	T1,T2,T4
StPad80	221	Covered	T1,T2,T4

transitions	Line No.	Covered	Tests
StFifoReceive->StIdle	200	Covered	T2,T4,T5
StFifoReceive->StPad80	221	Covered	T1,T2,T4
StIdle->StFifoReceive	208	Covered	T1,T2,T4
StLenHi->StFifoReceive	341	Not Covered
StLenHi->StIdle	200	Not Covered
StLenHi->StLenLo	314	Covered	T1,T2,T4
StLenLo->StFifoReceive	341	Not Covered
StLenLo->StIdle	200	Covered	T1,T2,T4
StPad00->StFifoReceive	341	Not Covered
StPad00->StIdle	200	Covered	T10,T25
StPad00->StLenHi	302	Covered	T1,T2,T4
StPad80->StFifoReceive	341	Not Covered
StPad80->StIdle	200	Covered	T11
StPad80->StLenHi	258	Covered	T6,T18,T7
StPad80->StPad00	264	Covered	T1,T2,T4

---

Branch Coverage for Module : prim_sha2_pad

	Line No.	Total	Covered	Percent
Branches		76	65	85.53
TERNARY	60	3	3	100.00
TERNARY	72	3	3	100.00
TERNARY	76	3	3	100.00
TERNARY	368	3	3	100.00
IF	81	2	2	100.00
CASE	101	24	18	75.00
IF	159	1	1	100.00
IF	190	2	2	100.00
CASE	202	22	18	81.82
IF	340	3	3	100.00
IF	348	6	5	83.33
IF	364	2	2	100.00
IF	373	2	2	100.00

60           assign txcnt_eq_1a0 = (digest_mode_flag_q == SHA2_256   || ~MultimodeEn)               ?
                                                                                                    -1-  
                                                                                                    ==>  
61                                                                                 (tx_count[8:0] == 9'h1a0)  :
                                                                                                               
62                                 ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ?
                                                                                                          -2-  
                                                                                                          ==>  
                                                                                                          ==>  

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T4
0	1	Covered	T1,T2,T4
0	0	Covered	T1,T2,T3

72           assign hash_stop_flag_d = (~sha_en_i || hash_go || hash_done_i) ? 1'b0 :
                                                                             -1-  
                                                                             ==>  
73                                     hash_stop_i                           ? 1'b1 :
                                                                             -2-  
                                                                             ==>  
                                                                             ==>  

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T2,T4,T5
0	0	Covered	T1,T2,T3

76           assign hash_process_flag_d = (~sha_en_i || hash_go || hash_done_i) ? 1'b0 :
                                                                                -1-  
                                                                                ==>  
77                                        hash_process_i                        ? 1'b1 :
                                                                                -2-  
                                                                                ==>  
                                                                                ==>  

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T1,T2,T4
0	0	Covered	T1,T2,T3

368          assign digest_mode_flag_d = (hash_start_i || hash_continue_i) ? digest_mode_i  :    // set config
                                                                           -1-  
                                                                           ==>  
369                                      hash_done_i                       ? SHA2_None      :    // clear
                                                                           -2-  
                                                                           ==>  
                                                                           ==>  

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T4
0	1	Covered	T1,T2,T4
0	0	Covered	T1,T2,T3

81             if (!rst_ni) begin
               -1-  
82               hash_stop_flag_q    <= 1'b0;
                 ==>
83               hash_process_flag_q <= 1'b0;
84             end else begin
85               hash_stop_flag_q    <= hash_stop_flag_d;
                 ==>

Branches:

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

101            unique case (sel_data)
                      -1-  
102              FifoIn: begin
103                shaf_rdata_o = fifo_rdata_i.data;
                   ==>
104              end
105        
106              Pad80: begin
107                // {a[7:0], b[7:0], c[7:0], d[7:0]}
108                // msglen[4:3] == 00 |-> {'h80, 'h00, 'h00, 'h00}
109                // msglen[4:3] == 01 |-> {msg,  'h80, 'h00, 'h00}
110                // msglen[4:3] == 10 |-> {msg[15:0],  'h80, 'h00}
111                // msglen[4:3] == 11 |-> {msg[23:0],        'h80}
112                if ((digest_mode_flag_q == SHA2_256) || ~MultimodeEn) begin
                   -2-  
113                  unique case (message_length_i[4:3])
                            -3-  
114                    2'b 00:  shaf_rdata_o = 64'h 0000_0000_8000_0000;
                       ==>
115                    2'b 01:  shaf_rdata_o = {32'h 0000_0000, fifo_rdata_i.data[31:24], 24'h 8000_00};
                       ==>
116                    2'b 10:  shaf_rdata_o = {32'h 0000_0000, fifo_rdata_i.data[31:16], 16'h 8000};
                       ==>
117                    2'b 11:  shaf_rdata_o = {32'h 0000_0000, fifo_rdata_i.data[31: 8],  8'h 80};
                       ==>
118                    default: shaf_rdata_o = 64'h0;
                       ==>
119                  endcase
120                end else if ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) begin
                            -4-  
121                  unique case (message_length_i[5:3])
                            -5-  
122                    3'b 000: shaf_rdata_o = 64'h 8000_0000_0000_0000;
                       ==>
123                    3'b 001: shaf_rdata_o = {fifo_rdata_i.data[63:56], 56'h 8000_0000_0000_00};
                       ==>
124                    3'b 010: shaf_rdata_o = {fifo_rdata_i.data[63:48], 48'h 8000_0000_0000};
                       ==>
125                    3'b 011: shaf_rdata_o = {fifo_rdata_i.data[63:40], 40'h 8000_0000_00};
                       ==>
126                    3'b 100: shaf_rdata_o = {fifo_rdata_i.data[63:32], 32'h 8000_0000};
                       ==>
127                    3'b 101: shaf_rdata_o = {fifo_rdata_i.data[63:24], 24'h 8000_00};
                       ==>
128                    3'b 110: shaf_rdata_o = {fifo_rdata_i.data[63:16], 16'h 8000};
                       ==>
129                    3'b 111: shaf_rdata_o = {fifo_rdata_i.data[63:8],  8'h 80};
                       ==>
130                    default: shaf_rdata_o = 64'h0;
                       ==>
131                  endcase
132                end else
133                    shaf_rdata_o = '0;
                       ==>
134              end
135        
136              Pad00: begin
137                shaf_rdata_o = '0;
                   ==>
138              end
139        
140              LenHi: begin
141                shaf_rdata_o = ((digest_mode_flag_q == SHA2_256) || ~MultimodeEn) ?
                                                                                     -6-  
                                                                                     ==>  
142                                                             {32'b0, message_length_i[63:32]}:
                                                                                                 
143                               ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ?
                                                                                                         -7-  
                                                                                                         ==>  
                                                                                                         ==>  
144                                                             message_length_i[127:64] : '0;
145              end
146        
147              LenLo: begin
148                shaf_rdata_o = ((digest_mode_flag_q == SHA2_256) || ~MultimodeEn) ?
                                                                                     -8-  
                                                                                     ==>  
149                                                             {32'b0, message_length_i[31:0]}:
                                                                                                
150                               ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ?
                                                                                                         -9-  
                                                                                                         ==>  
                                                                                                         ==>  
151                                                             message_length_i[63:0]: '0;
152              end
153        
154              default: begin
155                shaf_rdata_o = '0;
                   ==>

Branches:

-1-	-2-	-3-	-4-	-5-	-6-	-7-	-8-	-9-	Status	Tests
FifoIn	-	-	-	-	-	-	-	-	Covered	T1,T2,T3
Pad80	1	2'b00	-	-	-	-	-	-	Covered	T1,T4,T6
Pad80	1	2'b01	-	-	-	-	-	-	Covered	T1,T2,T4
Pad80	1	2'b10	-	-	-	-	-	-	Covered	T2,T7,T8
Pad80	1	2'b11	-	-	-	-	-	-	Covered	T1,T4,T6
Pad80	1	default	-	-	-	-	-	-	Not Covered
Pad80	0	-	1	3'b000	-	-	-	-	Covered	T1,T2,T4
Pad80	0	-	1	3'b001	-	-	-	-	Covered	T1,T2,T4
Pad80	0	-	1	3'b010	-	-	-	-	Covered	T5,T18,T7
Pad80	0	-	1	3'b011	-	-	-	-	Covered	T4,T18,T7
Pad80	0	-	1	3'b100	-	-	-	-	Covered	T7,T8,T20
Pad80	0	-	1	3'b101	-	-	-	-	Covered	T2,T4,T6
Pad80	0	-	1	3'b110	-	-	-	-	Covered	T18,T7,T21
Pad80	0	-	1	3'b111	-	-	-	-	Covered	T1,T4,T22
Pad80	0	-	1	default	-	-	-	-	Not Covered
Pad80	0	-	0	-	-	-	-	-	Not Covered
Pad00	-	-	-	-	-	-	-	-	Covered	T1,T2,T4
LenHi	-	-	-	-	1	-	-	-	Covered	T1,T2,T4
LenHi	-	-	-	-	0	1	-	-	Covered	T1,T2,T4
LenHi	-	-	-	-	0	0	-	-	Not Covered
LenLo	-	-	-	-	-	-	1	-	Covered	T1,T2,T4
LenLo	-	-	-	-	-	-	0	1	Covered	T1,T2,T4
LenLo	-	-	-	-	-	-	0	0	Not Covered
default	-	-	-	-	-	-	-	-	Not Covered

159            if (!MultimodeEn) shaf_rdata_o [63:32] = 32'b0; // assign most sig 32 bits to constant 0
               -1-  
               ==> (Unreachable)
               MISSING_ELSE
               ==>

Branches:

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

190            if (!rst_ni) st_q <= StIdle;
               -1-  
               ==>
191            else         st_q <= st_d;
               ==>

Branches:

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

202            unique case (st_q)
                      -1-  
203              StIdle: begin
204                sel_data      = FifoIn;
205                shaf_rvalid_o = 1'b0;
206                if (sha_en_i && hash_go) begin
                   -2-  
207                  inc_txcount = 1'b0;
                     ==>
208                  st_d        = StFifoReceive;
209                end else begin
210                  st_d        = StIdle;
                     ==>
211                end
212              end
213        
214              StFifoReceive: begin
215                sel_data = FifoIn;
216                if (fifo_partial && fifo_rvalid_i) begin
                   -3-                     
217                  // End of the message (last bit is not word-aligned) , assume hash_process_flag is set
218                  shaf_rvalid_o = 1'b0; // Update entry at StPad80
                     ==>
219                  inc_txcount   = 1'b0;
220                  fifo_rready_o = 1'b0;
221                  st_d = StPad80;
222                end else if (!hash_process_flag_q) begin
                            -4-  
223                  fifo_rready_o = shaf_rready_i;
                     ==>
224                  shaf_rvalid_o = fifo_rvalid_i;
225                  inc_txcount   = shaf_rready_i;
226                  st_d = StFifoReceive;
227                end else if (txcnt_eq_msg_len) begin
                            -5-  
228                  // already received all msg and was waiting process flag
229                  shaf_rvalid_o = 1'b0;
                     ==>
230                  inc_txcount   = 1'b0;
231                  fifo_rready_o = 1'b0;
232                  st_d = StPad80;
233                end else begin
234                  shaf_rvalid_o = fifo_rvalid_i;
                     ==>
235                  fifo_rready_o = shaf_rready_i; // 0 always
236                  inc_txcount   = shaf_rready_i; // 0 always
237                  st_d = StFifoReceive;
238                end
239        
240                if (txcnt_eq_msg_len && hash_stop_flag_q) begin
                   -6-  
241                  shaf_rvalid_o = 1'b0;
                     ==>
242                  inc_txcount   = 1'b0;
243                  fifo_rready_o = 1'b0;
244                  st_d = StIdle;
245                end
                   MISSING_ELSE
                   ==>
246              end
247        
248              StPad80: begin
249                sel_data      = Pad80;
250                shaf_rvalid_o = 1'b1;
251                fifo_rready_o = (digest_mode_flag_q == SHA2_256 || ~MultimodeEn) ?
                                                                                    -7-  
                                                                                    ==>  
252                                shaf_rready_i && |message_length_i[4:3] :
                                                                            
253                                ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ?
                                                                                                          -8-  
                                                                                                          ==>  
                                                                                                          ==>  
254                                shaf_rready_i && |message_length_i[5:3] : '0; // Only when partial
255        
256                // exactly 192 bits left, do not need to pad00's
257                if (shaf_rready_i && txcnt_eq_1a0) begin
                   -9-  
258                  st_d        = StLenHi;
                     ==>
259                  inc_txcount = 1'b1;
260                // it does not matter if value is < or > than 416 bits.  If it's the former, 00 pad until
261                // length field.  If >, then the next chunk will contain the length field with appropriate
262                // 0 padding.
263                end else if (shaf_rready_i && !txcnt_eq_1a0) begin
                            -10-  
264                  st_d        = StPad00;
                     ==>
265                  inc_txcount = 1'b1;
266                end else begin
267                  st_d        = StPad80;
                     ==>
268                  inc_txcount = 1'b0;
269                end
270        
271                // # Below part is temporal code to speed up the SHA by 16 clocks per chunk
272                // # (80 clk --> 64 clk)
273                // # leaving this as a reference but needs to verify it.
274                //if (shaf_rready_i && !txcnt_eq_1a0) begin
275                //  st_d = StPad00;
276                //
277                //  inc_txcount = 1'b1;
278                //  shaf_rvalid_o = (msg_word_aligned) ? 1'b1 : fifo_rvalid;
279                //  fifo_rready = (msg_word_aligned) ? 1'b0 : 1'b1;
280                //end else if (!shaf_rready_i && !txcnt_eq_1a0) begin
281                //  st_d = StPad80;
282                //
283                //  inc_txcount = 1'b0;
284                //  shaf_rvalid_o = (msg_word_aligned) ? 1'b1 : fifo_rvalid;
285                //
286                //end else if (shaf_rready_i && txcnt_eq_1a0) begin
287                //  st_d = StLenHi;
288                //  inc_txcount = 1'b1;
289                //end else begin
290                //  // !shaf_rready_i && txcnt_eq_1a0 , just wait until fifo_rready asserted
291                //  st_d = StPad80;
292                //  inc_txcount = 1'b0;
293                //end
294              end
295        
296              StPad00: begin
297                sel_data      = Pad00;
298                shaf_rvalid_o = 1'b1;
299        
300                if (shaf_rready_i) begin
                   -11-  
301                  inc_txcount = 1'b1;
302                  if (txcnt_eq_1a0) st_d = StLenHi;
                     -12-  
                     ==>
303                  else              st_d = StPad00;
                     ==>
304                end else begin
305                  st_d = StPad00;
                     ==>
306                end
307              end
308        
309              StLenHi: begin
310                sel_data      = LenHi;
311                shaf_rvalid_o = 1'b1;
312        
313                if (shaf_rready_i) begin
                   -13-  
314                  st_d = StLenLo;
                     ==>
315                  inc_txcount = 1'b1;
316                end else begin
317                  st_d = StLenHi;
                     ==>
318                  inc_txcount = 1'b0;
319                end
320              end
321        
322              StLenLo: begin
323                sel_data        = LenLo;
324                shaf_rvalid_o   = 1'b1;
325        
326                if (shaf_rready_i) begin
                   -14-  
327                  st_d        = StIdle;
                     ==>
328                  inc_txcount = 1'b1;
329                end else begin
330                  st_d        = StLenLo;
                     ==>
331                  inc_txcount = 1'b0;
332                end
333              end
334        
335              default: begin
336                st_d = StIdle;
                   ==>

Branches:

-1-	-2-	-3-	-4-	-5-	-6-	-7-	-8-	-9-	-10-	-11-	-12-	-13-	-14-	Status	Tests
StIdle	1	-	-	-	-	-	-	-	-	-	-	-	-	Covered	T1,T2,T4
StIdle	0	-	-	-	-	-	-	-	-	-	-	-	-	Covered	T1,T2,T3
StFifoReceive	-	1	-	-	-	-	-	-	-	-	-	-	-	Covered	T1,T2,T4
StFifoReceive	-	0	1	-	-	-	-	-	-	-	-	-	-	Covered	T1,T2,T4
StFifoReceive	-	0	0	1	-	-	-	-	-	-	-	-	-	Covered	T1,T2,T4
StFifoReceive	-	0	0	0	-	-	-	-	-	-	-	-	-	Covered	T1,T5,T6
StFifoReceive	-	-	-	-	1	-	-	-	-	-	-	-	-	Covered	T2,T4,T5
StFifoReceive	-	-	-	-	0	-	-	-	-	-	-	-	-	Covered	T1,T2,T4
StPad80	-	-	-	-	-	1	-	-	-	-	-	-	-	Covered	T1,T2,T4
StPad80	-	-	-	-	-	0	1	-	-	-	-	-	-	Covered	T1,T2,T4
StPad80	-	-	-	-	-	0	0	-	-	-	-	-	-	Not Covered
StPad80	-	-	-	-	-	-	-	1	-	-	-	-	-	Covered	T6,T18,T7
StPad80	-	-	-	-	-	-	-	0	1	-	-	-	-	Covered	T1,T2,T4
StPad80	-	-	-	-	-	-	-	0	0	-	-	-	-	Covered	T1,T4,T19
StPad00	-	-	-	-	-	-	-	-	-	1	1	-	-	Covered	T1,T2,T4
StPad00	-	-	-	-	-	-	-	-	-	1	0	-	-	Covered	T1,T2,T4
StPad00	-	-	-	-	-	-	-	-	-	0	-	-	-	Covered	T1,T2,T4
StLenHi	-	-	-	-	-	-	-	-	-	-	-	1	-	Covered	T1,T2,T4
StLenHi	-	-	-	-	-	-	-	-	-	-	-	0	-	Not Covered
StLenLo	-	-	-	-	-	-	-	-	-	-	-	-	1	Covered	T1,T2,T4
StLenLo	-	-	-	-	-	-	-	-	-	-	-	-	0	Not Covered
default	-	-	-	-	-	-	-	-	-	-	-	-	-	Not Covered

340            if (!sha_en_i)    st_d = StIdle;
               -1-  
               ==>
341            else if (hash_go) st_d = StFifoReceive;
                    -2-                       
               ==>
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T1,T2,T4
0	0	Covered	T1,T2,T3

348            if (hash_start_i) begin
               -1-  
349              // When starting a fresh hash, initialize the data counter to zero.
350              tx_count_d = '0;
                 ==>
351            end else if (hash_continue_i) begin
                        -2-  
352              // When continuing to hash, set the data counter to the current message length.
353              tx_count_d = message_length_i;
                 ==>
354            end else if (inc_txcount) begin
                        -3-  
355              if ((digest_mode_flag_q == SHA2_256) || !MultimodeEn) begin
                 -4-  
356                tx_count_d[127:5] = tx_count[127:5] + 1'b1;
                   ==>
357              end else if ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) begin
                          -5-  
358                tx_count_d[127:6] = tx_count[127:6] + 1'b1;
                   ==>
359              end
                 MISSING_ELSE
                 ==>
360            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	-3-	-4-	-5-	Status	Tests
1	-	-	-	-	Covered	T1,T2,T4
0	1	-	-	-	Covered	T2,T4,T5
0	0	1	1	-	Covered	T1,T2,T4
0	0	1	0	1	Covered	T1,T2,T4
0	0	1	0	0	Not Covered
0	0	0	-	-	Covered	T1,T2,T3

364            if (!rst_ni) tx_count <= '0;
               -1-  
               ==>
365            else         tx_count <= tx_count_d;
               ==>

Branches:

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

373            if (!rst_ni)  digest_mode_flag_q <= SHA2_None;
               -1-  
               ==>
374            else          digest_mode_flag_q <= digest_mode_flag_d;
               ==>

Branches:

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

Line Coverage for Instance : tb.dut.u_prim_sha2_512.gen_multimode_logic.u_prim_sha2_multimode.u_pad

	Line No.	Total	Covered	Percent
TOTAL		129	124	96.12
CONT_ASSIGN	48	1	1	100.00
CONT_ASSIGN	56	1	1	100.00
CONT_ASSIGN	60	1	1	100.00
CONT_ASSIGN	67	1	1	100.00
CONT_ASSIGN	72	1	1	100.00
CONT_ASSIGN	76	1	1	100.00
ALWAYS	81	5	5	100.00
ALWAYS	101	23	22	95.65
ALWAYS	190	3	3	100.00
ALWAYS	196	74	70	94.59
ALWAYS	346	10	10	100.00
ALWAYS	364	3	3	100.00
CONT_ASSIGN	368	1	1	100.00
ALWAYS	373	3	3	100.00
CONT_ASSIGN	378	1	1	100.00

47                        // to hash.
48         1/1            assign hash_go = hash_start_i | hash_continue_i;
           Tests:       T1 T2 T3 
49                      
50                        // tie off unused inport ports and signals
51                        if (!MultimodeEn) begin : gen_tie_unused
52                          logic unused_signals;
53                          assign unused_signals = ^{message_length_i[127:64]};
54                        end
55                      
56         1/1            assign fifo_partial = MultimodeEn ? ~&fifo_rdata_i.mask :
           Tests:       T1 T2 T3 
57                                                            ~&fifo_rdata_i.mask[3:0];
58                      
59                        // tx_count[8:0] == 'h1c0 --> should send LenHi
60         1/1            assign txcnt_eq_1a0 = (digest_mode_flag_q == SHA2_256   || ~MultimodeEn)               ?
           Tests:       T1 T2 T3 
61                                                                                              (tx_count[8:0] == 9'h1a0)  :
62                                              ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ?
63                                                                                              (tx_count[9:0] == 10'h340) :
64                                                                                              '0;
65                      
66                        if (MultimodeEn) begin : gen_txcnt_comp_multimode
67         1/1              assign txcnt_eq_msg_len = (tx_count == message_length_i);
           Tests:       T1 T2 T3 
68                        end else begin : gen_txcnt_comp_no_multimode
69                          assign txcnt_eq_msg_len = (tx_count[63:0] == message_length_i[63:0]);
70                        end
71                      
72         1/1            assign hash_stop_flag_d = (~sha_en_i || hash_go || hash_done_i) ? 1'b0 :
           Tests:       T1 T2 T3 
73                                                  hash_stop_i                           ? 1'b1 :
74                                                                                          hash_stop_flag_q;
75                      
76         1/1            assign hash_process_flag_d = (~sha_en_i || hash_go || hash_done_i) ? 1'b0 :
           Tests:       T1 T2 T3 
77                                                     hash_process_i                        ? 1'b1 :
78                                                                                             hash_process_flag_q;
79                      
80                        always_ff @(posedge clk_i or negedge rst_ni) begin
81         1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
82         1/1                hash_stop_flag_q    <= 1'b0;
           Tests:       T1 T2 T3 
83         1/1                hash_process_flag_q <= 1'b0;
           Tests:       T1 T2 T3 
84                          end else begin
85         1/1                hash_stop_flag_q    <= hash_stop_flag_d;
           Tests:       T1 T2 T3 
86         1/1                hash_process_flag_q <= hash_process_flag_d;
           Tests:       T1 T2 T3 
87                          end
88                        end
89                      
90                        // data path: fout_wdata
91                        typedef enum logic [2:0] {
92                          FifoIn,         // fin_wdata, fin_wstrb
93                          Pad80,          // {8'h80, 8'h00} , strb (calc based on len[4:3])
94                          Pad00,          // 32'h0, full strb
95                          LenHi,          // len[63:32], full strb
96                          LenLo           // len[31:0], full strb
97                        } sel_data_e;
98                        sel_data_e sel_data;
99                      
100                       always_comb begin
101        1/1              unique case (sel_data)
           Tests:       T1 T2 T3 
102                           FifoIn: begin
103        1/1                  shaf_rdata_o = fifo_rdata_i.data;
           Tests:       T1 T2 T3 
104                           end
105                     
106                           Pad80: begin
107                             // {a[7:0], b[7:0], c[7:0], d[7:0]}
108                             // msglen[4:3] == 00 |-> {'h80, 'h00, 'h00, 'h00}
109                             // msglen[4:3] == 01 |-> {msg,  'h80, 'h00, 'h00}
110                             // msglen[4:3] == 10 |-> {msg[15:0],  'h80, 'h00}
111                             // msglen[4:3] == 11 |-> {msg[23:0],        'h80}
112        1/1                  if ((digest_mode_flag_q == SHA2_256) || ~MultimodeEn) begin
           Tests:       T1 T2 T4 
113        1/1                    unique case (message_length_i[4:3])
           Tests:       T1 T2 T4 
114        1/1                      2'b 00:  shaf_rdata_o = 64'h 0000_0000_8000_0000;
           Tests:       T1 T4 T6 
115        1/1                      2'b 01:  shaf_rdata_o = {32'h 0000_0000, fifo_rdata_i.data[31:24], 24'h 8000_00};
           Tests:       T1 T2 T4 
116        1/1                      2'b 10:  shaf_rdata_o = {32'h 0000_0000, fifo_rdata_i.data[31:16], 16'h 8000};
           Tests:       T2 T7 T8 
117        1/1                      2'b 11:  shaf_rdata_o = {32'h 0000_0000, fifo_rdata_i.data[31: 8],  8'h 80};
           Tests:       T1 T4 T6 
118                                 default: shaf_rdata_o = 64'h0;
Exclude Annotation: VC_COV_UNR
119                               endcase
120        1/1                  end else if ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) begin
           Tests:       T1 T2 T4 
121        1/1                    unique case (message_length_i[5:3])
           Tests:       T1 T2 T4 
122        1/1                      3'b 000: shaf_rdata_o = 64'h 8000_0000_0000_0000;
           Tests:       T1 T2 T4 
123        1/1                      3'b 001: shaf_rdata_o = {fifo_rdata_i.data[63:56], 56'h 8000_0000_0000_00};
           Tests:       T1 T2 T4 
124        1/1                      3'b 010: shaf_rdata_o = {fifo_rdata_i.data[63:48], 48'h 8000_0000_0000};
           Tests:       T5 T18 T7 
125        1/1                      3'b 011: shaf_rdata_o = {fifo_rdata_i.data[63:40], 40'h 8000_0000_00};
           Tests:       T4 T18 T7 
126        1/1                      3'b 100: shaf_rdata_o = {fifo_rdata_i.data[63:32], 32'h 8000_0000};
           Tests:       T7 T8 T20 
127        1/1                      3'b 101: shaf_rdata_o = {fifo_rdata_i.data[63:24], 24'h 8000_00};
           Tests:       T2 T4 T6 
128        1/1                      3'b 110: shaf_rdata_o = {fifo_rdata_i.data[63:16], 16'h 8000};
           Tests:       T18 T7 T21 
129        1/1                      3'b 111: shaf_rdata_o = {fifo_rdata_i.data[63:8],  8'h 80};
           Tests:       T1 T4 T22 
130                                 default: shaf_rdata_o = 64'h0;
Exclude Annotation: VC_COV_UNR
131                               endcase
132                             end else
133        0/1     ==>              shaf_rdata_o = '0;
134                           end
135                     
136                           Pad00: begin
137        1/1                  shaf_rdata_o = '0;
           Tests:       T1 T2 T4 
138                           end
139                     
140                           LenHi: begin
141        1/1                  shaf_rdata_o = ((digest_mode_flag_q == SHA2_256) || ~MultimodeEn) ?
           Tests:       T1 T2 T4 
142                                                                          {32'b0, message_length_i[63:32]}:
143                                            ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ?
144                                                                          message_length_i[127:64] : '0;
145                           end
146                     
147                           LenLo: begin
148        1/1                  shaf_rdata_o = ((digest_mode_flag_q == SHA2_256) || ~MultimodeEn) ?
           Tests:       T1 T2 T4 
149                                                                          {32'b0, message_length_i[31:0]}:
150                                            ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ?
151                                                                          message_length_i[63:0]: '0;
152                           end
153                     
154                           default: begin
155                             shaf_rdata_o = '0;
Exclude Annotation: VC_COV_UNR
156                           end
157                         endcase
158                     
159        1/1(1 unreachable)      if (!MultimodeEn) shaf_rdata_o [63:32] = 32'b0; // assign most sig 32 bits to constant 0
           Tests:       T1 T2 T3 
                        MISSING_ELSE
160                       end
161                     
162                       // Padded length
163                       // $ceil(message_length_i + 8 + 64, 512) -> message_length_i [8:0] + 440 and ignore carry
164                       //assign length_added = (message_length_i[8:0] + 9'h1b8) ;
165                     
166                       // fifo control
167                       // add 8'h 80 , N 8'h00, 64'h message_length_i
168                     
169                       // Steps
170                       // 1. `hash_start_i` from CPU (or DMA?)
171                       // 2. calculate `padded_length` from `message_length_i`
172                       // 3. Check if tx_count == message_length_i, then go to 5
173                       // 4. Receiving FIFO input (hand over to fifo output)
174                       // 5. Padding bit 1 (8'h80) followed by 8'h00 if needed
175                       // 6. Padding with length (high -> low)
176                     
177                       // State Machine
178                       typedef enum logic [2:0] {
179                         StIdle,        // fin_full to prevent unwanted FIFO write
180                         StFifoReceive, // Check tx_count == message_length_i
181                         StPad80,       // 8'h 80 + 8'h 00 X N
182                         StPad00,
183                         StLenHi,
184                         StLenLo
185                       } pad_st_e;
186                     
187                       pad_st_e st_q, st_d;
188                     
189                       always_ff @(posedge clk_i or negedge rst_ni) begin
190        2/2              if (!rst_ni) st_q <= StIdle;
           Tests:       T1 T2 T3  | T1 T2 T3 
191        1/1              else         st_q <= st_d;
           Tests:       T1 T2 T3 
192                       end
193                     
194                       // Next state
195                       always_comb begin
196        1/1              shaf_rvalid_o = 1'b0;
           Tests:       T1 T2 T3 
197        1/1              inc_txcount   = 1'b0;
           Tests:       T1 T2 T3 
198        1/1              sel_data      = FifoIn;
           Tests:       T1 T2 T3 
199        1/1              fifo_rready_o = 1'b0;
           Tests:       T1 T2 T3 
200        1/1              st_d          = StIdle;
           Tests:       T1 T2 T3 
201                     
202        1/1              unique case (st_q)
           Tests:       T1 T2 T3 
203                           StIdle: begin
204        1/1                  sel_data      = FifoIn;
           Tests:       T1 T2 T3 
205        1/1                  shaf_rvalid_o = 1'b0;
           Tests:       T1 T2 T3 
206        1/1                  if (sha_en_i && hash_go) begin
           Tests:       T1 T2 T3 
207        1/1                    inc_txcount = 1'b0;
           Tests:       T1 T2 T4 
208        1/1                    st_d        = StFifoReceive;
           Tests:       T1 T2 T4 
209                             end else begin
210        1/1                    st_d        = StIdle;
           Tests:       T1 T2 T3 
211                             end
212                           end
213                     
214                           StFifoReceive: begin
215        1/1                  sel_data = FifoIn;
           Tests:       T1 T2 T4 
216        1/1                  if (fifo_partial && fifo_rvalid_i) begin
           Tests:       T1 T2 T4 
217                               // End of the message (last bit is not word-aligned) , assume hash_process_flag is set
218        1/1                    shaf_rvalid_o = 1'b0; // Update entry at StPad80
           Tests:       T1 T2 T4 
219        1/1                    inc_txcount   = 1'b0;
           Tests:       T1 T2 T4 
220        1/1                    fifo_rready_o = 1'b0;
           Tests:       T1 T2 T4 
221        1/1                    st_d = StPad80;
           Tests:       T1 T2 T4 
222        1/1                  end else if (!hash_process_flag_q) begin
           Tests:       T1 T2 T4 
223        1/1                    fifo_rready_o = shaf_rready_i;
           Tests:       T1 T2 T4 
224        1/1                    shaf_rvalid_o = fifo_rvalid_i;
           Tests:       T1 T2 T4 
225        1/1                    inc_txcount   = shaf_rready_i;
           Tests:       T1 T2 T4 
226        1/1                    st_d = StFifoReceive;
           Tests:       T1 T2 T4 
227        1/1                  end else if (txcnt_eq_msg_len) begin
           Tests:       T1 T2 T4 
228                               // already received all msg and was waiting process flag
229        1/1                    shaf_rvalid_o = 1'b0;
           Tests:       T1 T2 T4 
230        1/1                    inc_txcount   = 1'b0;
           Tests:       T1 T2 T4 
231        1/1                    fifo_rready_o = 1'b0;
           Tests:       T1 T2 T4 
232        1/1                    st_d = StPad80;
           Tests:       T1 T2 T4 
233                             end else begin
234        1/1                    shaf_rvalid_o = fifo_rvalid_i;
           Tests:       T1 T5 T6 
235        1/1                    fifo_rready_o = shaf_rready_i; // 0 always
           Tests:       T1 T5 T6 
236        1/1                    inc_txcount   = shaf_rready_i; // 0 always
           Tests:       T1 T5 T6 
237        1/1                    st_d = StFifoReceive;
           Tests:       T1 T5 T6 
238                             end
239                     
240        1/1                  if (txcnt_eq_msg_len && hash_stop_flag_q) begin
           Tests:       T1 T2 T4 
241        1/1                    shaf_rvalid_o = 1'b0;
           Tests:       T2 T4 T5 
242        1/1                    inc_txcount   = 1'b0;
           Tests:       T2 T4 T5 
243        1/1                    fifo_rready_o = 1'b0;
           Tests:       T2 T4 T5 
244        1/1                    st_d = StIdle;
           Tests:       T2 T4 T5 
245                             end
                        MISSING_ELSE
246                           end
247                     
248                           StPad80: begin
249        1/1                  sel_data      = Pad80;
           Tests:       T1 T2 T4 
250        1/1                  shaf_rvalid_o = 1'b1;
           Tests:       T1 T2 T4 
251        1/1                  fifo_rready_o = (digest_mode_flag_q == SHA2_256 || ~MultimodeEn) ?
           Tests:       T1 T2 T4 
252                                             shaf_rready_i && |message_length_i[4:3] :
253                                             ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ?
254                                             shaf_rready_i && |message_length_i[5:3] : '0; // Only when partial
255                     
256                             // exactly 192 bits left, do not need to pad00's
257        1/1                  if (shaf_rready_i && txcnt_eq_1a0) begin
           Tests:       T1 T2 T4 
258        1/1                    st_d        = StLenHi;
           Tests:       T6 T18 T7 
259        1/1                    inc_txcount = 1'b1;
           Tests:       T6 T18 T7 
260                             // it does not matter if value is < or > than 416 bits.  If it's the former, 00 pad until
261                             // length field.  If >, then the next chunk will contain the length field with appropriate
262                             // 0 padding.
263        1/1                  end else if (shaf_rready_i && !txcnt_eq_1a0) begin
           Tests:       T1 T2 T4 
264        1/1                    st_d        = StPad00;
           Tests:       T1 T2 T4 
265        1/1                    inc_txcount = 1'b1;
           Tests:       T1 T2 T4 
266                             end else begin
267        1/1                    st_d        = StPad80;
           Tests:       T1 T4 T19 
268        1/1                    inc_txcount = 1'b0;
           Tests:       T1 T4 T19 
269                             end
270                     
271                             // # Below part is temporal code to speed up the SHA by 16 clocks per chunk
272                             // # (80 clk --> 64 clk)
273                             // # leaving this as a reference but needs to verify it.
274                             //if (shaf_rready_i && !txcnt_eq_1a0) begin
275                             //  st_d = StPad00;
276                             //
277                             //  inc_txcount = 1'b1;
278                             //  shaf_rvalid_o = (msg_word_aligned) ? 1'b1 : fifo_rvalid;
279                             //  fifo_rready = (msg_word_aligned) ? 1'b0 : 1'b1;
280                             //end else if (!shaf_rready_i && !txcnt_eq_1a0) begin
281                             //  st_d = StPad80;
282                             //
283                             //  inc_txcount = 1'b0;
284                             //  shaf_rvalid_o = (msg_word_aligned) ? 1'b1 : fifo_rvalid;
285                             //
286                             //end else if (shaf_rready_i && txcnt_eq_1a0) begin
287                             //  st_d = StLenHi;
288                             //  inc_txcount = 1'b1;
289                             //end else begin
290                             //  // !shaf_rready_i && txcnt_eq_1a0 , just wait until fifo_rready asserted
291                             //  st_d = StPad80;
292                             //  inc_txcount = 1'b0;
293                             //end
294                           end
295                     
296                           StPad00: begin
297        1/1                  sel_data      = Pad00;
           Tests:       T1 T2 T4 
298        1/1                  shaf_rvalid_o = 1'b1;
           Tests:       T1 T2 T4 
299                     
300        1/1                  if (shaf_rready_i) begin
           Tests:       T1 T2 T4 
301        1/1                    inc_txcount = 1'b1;
           Tests:       T1 T2 T4 
302        2/2                    if (txcnt_eq_1a0) st_d = StLenHi;
           Tests:       T1 T2 T4  | T1 T2 T4 
303        1/1                    else              st_d = StPad00;
           Tests:       T1 T2 T4 
304                             end else begin
305        1/1                    st_d = StPad00;
           Tests:       T1 T2 T4 
306                             end
307                           end
308                     
309                           StLenHi: begin
310        1/1                  sel_data      = LenHi;
           Tests:       T1 T2 T4 
311        1/1                  shaf_rvalid_o = 1'b1;
           Tests:       T1 T2 T4 
312                     
313        1/1                  if (shaf_rready_i) begin
           Tests:       T1 T2 T4 
314        1/1                    st_d = StLenLo;
           Tests:       T1 T2 T4 
315        1/1                    inc_txcount = 1'b1;
           Tests:       T1 T2 T4 
316                             end else begin
317        0/1     ==>            st_d = StLenHi;
318        0/1     ==>            inc_txcount = 1'b0;
319                             end
320                           end
321                     
322                           StLenLo: begin
323        1/1                  sel_data        = LenLo;
           Tests:       T1 T2 T4 
324        1/1                  shaf_rvalid_o   = 1'b1;
           Tests:       T1 T2 T4 
325                     
326        1/1                  if (shaf_rready_i) begin
           Tests:       T1 T2 T4 
327        1/1                    st_d        = StIdle;
           Tests:       T1 T2 T4 
328        1/1                    inc_txcount = 1'b1;
           Tests:       T1 T2 T4 
329                             end else begin
330        0/1     ==>            st_d        = StLenLo;
331        0/1     ==>            inc_txcount = 1'b0;
332                             end
333                           end
334                     
335                           default: begin
336                             st_d = StIdle;
Exclude Annotation: VC_COV_UNR
337                           end
338                         endcase
339                     
340        2/2              if (!sha_en_i)    st_d = StIdle;
           Tests:       T1 T2 T3  | T1 T2 T3 
341        2/2              else if (hash_go) st_d = StFifoReceive;
           Tests:       T1 T2 T3  | T1 T2 T4 
                        MISSING_ELSE
342                       end
343                     
344                       // tx_count
345                       always_comb begin
346        1/1              tx_count_d = tx_count;
           Tests:       T1 T2 T3 
347                     
348        1/1              if (hash_start_i) begin
           Tests:       T1 T2 T3 
349                           // When starting a fresh hash, initialize the data counter to zero.
350        1/1                tx_count_d = '0;
           Tests:       T1 T2 T4 
351        1/1              end else if (hash_continue_i) begin
           Tests:       T1 T2 T3 
352                           // When continuing to hash, set the data counter to the current message length.
353        1/1                tx_count_d = message_length_i;
           Tests:       T2 T4 T5 
354        1/1              end else if (inc_txcount) begin
           Tests:       T1 T2 T3 
355        1/1                if ((digest_mode_flag_q == SHA2_256) || !MultimodeEn) begin
           Tests:       T1 T2 T4 
356        1/1                  tx_count_d[127:5] = tx_count[127:5] + 1'b1;
           Tests:       T1 T2 T4 
357        1/1                end else if ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) begin
           Tests:       T1 T2 T4 
358        1/1                  tx_count_d[127:6] = tx_count[127:6] + 1'b1;
           Tests:       T1 T2 T4 
359                           end
                   ==>  MISSING_ELSE
360                         end
                        MISSING_ELSE
361                       end
362                     
363                       always_ff @(posedge clk_i or negedge rst_ni) begin
364        2/2              if (!rst_ni) tx_count <= '0;
           Tests:       T1 T2 T3  | T1 T2 T3 
365        1/1              else         tx_count <= tx_count_d;
           Tests:       T1 T2 T3 
366                       end
367                     
368        1/1            assign digest_mode_flag_d = (hash_start_i || hash_continue_i) ? digest_mode_i  :    // set config
           Tests:       T1 T2 T3 
369                                                   hash_done_i                       ? SHA2_None      :    // clear
370                                                                                       digest_mode_flag_q; // keep
371                     
372                       always_ff @(posedge clk_i or negedge rst_ni) begin
373        2/2              if (!rst_ni)  digest_mode_flag_q <= SHA2_None;
           Tests:       T1 T2 T3  | T1 T2 T3 
374        1/1              else          digest_mode_flag_q <= digest_mode_flag_d;
           Tests:       T1 T2 T3 
375                       end
376                     
377                       // State machine is in Idle only when it meets tx_count == message length
378        1/1            assign msg_feed_complete_o = (hash_process_flag_q || hash_stop_flag_q) && (st_q == StIdle);
           Tests:       T1 T2 T3 

---

Cond Coverage for Instance : tb.dut.u_prim_sha2_512.gen_multimode_logic.u_prim_sha2_multimode.u_pad

	Total	Covered	Percent
Conditions	138	131	94.93
Logical	138	131	94.93
Non-Logical	0	0
Event	0	0

 LINE       48
 EXPRESSION (hash_start_i | hash_continue_i)
             ------1-----   -------2-------

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T2,T4,T5
1	0	Covered	T1,T2,T4

 LINE       60
 EXPRESSION 
 Number  Term
      1  ((digest_mode_flag_q == SHA2_256) || ((~MultimodeEn))) ? (tx_count[8:0] == 9'h1a0) : (((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ? (tx_count[9:0] == 10'h340) : '0))

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T4

 LINE       60
 SUB-EXPRESSION ((digest_mode_flag_q == SHA2_256) || ((~MultimodeEn)))
                 ----------------1---------------    --------2-------

-1-	-2-	Status	Tests
0	-	Covered	T1,T2,T3
1	-	Covered	T1,T2,T4

 LINE       60
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_256)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T4

 LINE       60
 SUB-EXPRESSION (tx_count[8:0] == 9'h1a0)
                ------------1------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       60
 SUB-EXPRESSION (((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ? (tx_count[9:0] == 10'h340) : '0)
                 -----------------------------------1----------------------------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T4

 LINE       60
 SUB-EXPRESSION ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512))
                 ----------------1---------------    ----------------2---------------

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T1,T2,T4
1	0	Covered	T1,T2,T4

 LINE       60
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_384)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T4

 LINE       60
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_512)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T4

 LINE       60
 SUB-EXPRESSION (tx_count[9:0] == 10'h340)
                -------------1------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       67
 EXPRESSION (tx_count == message_length_i)
            ---------------1--------------

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

 LINE       72
 EXPRESSION ((((~sha_en_i)) || hash_go || hash_done_i) ? 1'b0 : (hash_stop_i ? 1'b1 : hash_stop_flag_q))
             --------------------1--------------------

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

 LINE       72
 SUB-EXPRESSION (((~sha_en_i)) || hash_go || hash_done_i)
                 ------1------    ---2---    -----3-----

-1-	-2-	-3-	Status	Tests
0	0	0	Covered	T1,T2,T3
0	0	1	Covered	T1,T2,T4
0	1	0	Covered	T1,T2,T4
1	0	0	Covered	T1,T2,T3

 LINE       72
 SUB-EXPRESSION (hash_stop_i ? 1'b1 : hash_stop_flag_q)
                 -----1-----

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T2,T4,T5

 LINE       76
 EXPRESSION ((((~sha_en_i)) || hash_go || hash_done_i) ? 1'b0 : (hash_process_i ? 1'b1 : hash_process_flag_q))
             --------------------1--------------------

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

 LINE       76
 SUB-EXPRESSION (((~sha_en_i)) || hash_go || hash_done_i)
                 ------1------    ---2---    -----3-----

-1-	-2-	-3-	Status	Tests
0	0	0	Covered	T1,T2,T3
0	0	1	Covered	T1,T2,T4
0	1	0	Covered	T1,T2,T4
1	0	0	Covered	T1,T2,T3

 LINE       76
 SUB-EXPRESSION (hash_process_i ? 1'b1 : hash_process_flag_q)
                 -------1------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T4

 LINE       112
 EXPRESSION ((digest_mode_flag_q == SHA2_256) || ((~MultimodeEn)))
             ----------------1---------------    --------2-------

-1-	-2-	Status	Tests
0	-	Covered	T1,T2,T4
1	-	Covered	T1,T2,T4

 LINE       112
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_256)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       120
 EXPRESSION ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512))
             ----------------1---------------    ----------------2---------------

-1-	-2-	Status	Tests
0	0	Not Covered
0	1	Covered	T1,T2,T4
1	0	Covered	T1,T2,T4

 LINE       120
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_384)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       120
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_512)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       141
 EXPRESSION 
 Number  Term
      1  ((digest_mode_flag_q == SHA2_256) || ((~MultimodeEn))) ? ({32'b0, message_length_i[63:32]}) : (((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ? message_length_i[127:64] : '0))

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       141
 SUB-EXPRESSION ((digest_mode_flag_q == SHA2_256) || ((~MultimodeEn)))
                 ----------------1---------------    --------2-------

-1-	-2-	Status	Tests
0	-	Covered	T1,T2,T4
1	-	Covered	T1,T2,T4

 LINE       141
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_256)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       141
 SUB-EXPRESSION (((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ? message_length_i[127:64] : '0)
                 -----------------------------------1----------------------------------

-1-	Status	Tests	Exclude Annotation
0	Excluded		VC_COV_UNR
1	Covered	T1,T2,T4

 LINE       141
 SUB-EXPRESSION ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512))
                 ----------------1---------------    ----------------2---------------

-1-	-2-	Status	Tests	Exclude Annotation
0	0	Excluded		VC_COV_UNR
0	1	Covered	T1,T2,T4
1	0	Covered	T1,T2,T4

 LINE       141
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_384)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       141
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_512)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       148
 EXPRESSION 
 Number  Term
      1  ((digest_mode_flag_q == SHA2_256) || ((~MultimodeEn))) ? ({32'b0, message_length_i[31:0]}) : (((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ? message_length_i[63:0] : '0))

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       148
 SUB-EXPRESSION ((digest_mode_flag_q == SHA2_256) || ((~MultimodeEn)))
                 ----------------1---------------    --------2-------

-1-	-2-	Status	Tests
0	-	Covered	T1,T2,T4
1	-	Covered	T1,T2,T4

 LINE       148
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_256)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       148
 SUB-EXPRESSION (((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ? message_length_i[63:0] : '0)
                 -----------------------------------1----------------------------------

-1-	Status	Tests	Exclude Annotation
0	Excluded		VC_COV_UNR
1	Covered	T1,T2,T4

 LINE       148
 SUB-EXPRESSION ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512))
                 ----------------1---------------    ----------------2---------------

-1-	-2-	Status	Tests	Exclude Annotation
0	0	Excluded		VC_COV_UNR
0	1	Covered	T1,T2,T4
1	0	Covered	T1,T2,T4

 LINE       148
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_384)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       148
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_512)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       206
 EXPRESSION (sha_en_i && hash_go)
             ----1---    ---2---

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T1,T2,T3
1	1	Covered	T1,T2,T4

 LINE       216
 EXPRESSION (fifo_partial && fifo_rvalid_i)
             ------1-----    ------2------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T4
1	0	Covered	T1,T2,T4
1	1	Covered	T1,T2,T4

 LINE       240
 EXPRESSION (txcnt_eq_msg_len && hash_stop_flag_q)
             --------1-------    --------2-------

-1-	-2-	Status	Tests
0	1	Covered	T8,T23,T24
1	0	Covered	T1,T2,T4
1	1	Covered	T2,T4,T5

 LINE       251
 EXPRESSION 
 Number  Term
      1  ((digest_mode_flag_q == SHA2_256) || ((~MultimodeEn))) ? (shaf_rready_i && ((|message_length_i[4:3]))) : (((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ? (shaf_rready_i && ((|message_length_i[5:3]))) : '0))

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       251
 SUB-EXPRESSION ((digest_mode_flag_q == SHA2_256) || ((~MultimodeEn)))
                 ----------------1---------------    --------2-------

-1-	-2-	Status	Tests
0	-	Covered	T1,T2,T4
1	-	Covered	T1,T2,T4

 LINE       251
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_256)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       251
 SUB-EXPRESSION (shaf_rready_i && ((|message_length_i[4:3])))
                 ------1------    -------------2------------

-1-	-2-	Status	Tests
0	1	Covered	T7,T9,T21
1	0	Covered	T1,T4,T6
1	1	Covered	T1,T2,T4

 LINE       251
 SUB-EXPRESSION (((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ? (shaf_rready_i && ((|message_length_i[5:3]))) : '0)
                 -----------------------------------1----------------------------------

-1-	Status	Tests
0	Not Covered
1	Covered	T1,T2,T4

 LINE       251
 SUB-EXPRESSION ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512))
                 ----------------1---------------    ----------------2---------------

-1-	-2-	Status	Tests
0	0	Not Covered
0	1	Covered	T1,T2,T4
1	0	Covered	T1,T2,T4

 LINE       251
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_384)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       251
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_512)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       251
 SUB-EXPRESSION (shaf_rready_i && ((|message_length_i[5:3])))
                 ------1------    -------------2------------

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T1,T2,T4
1	1	Covered	T1,T2,T4

 LINE       257
 EXPRESSION (shaf_rready_i && txcnt_eq_1a0)
             ------1------    ------2-----

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T1,T2,T4
1	1	Covered	T6,T18,T7

 LINE       263
 EXPRESSION (shaf_rready_i && ((!txcnt_eq_1a0)))
             ------1------    --------2--------

-1-	-2-	Status	Tests	Exclude Annotation
0	1	Covered	T1,T4,T19
1	0	Excluded		VC_COV_UNR
1	1	Covered	T1,T2,T4

 LINE       355
 EXPRESSION ((digest_mode_flag_q == SHA2_256) || ((!MultimodeEn)))
             ----------------1---------------    --------2-------

-1-	-2-	Status	Tests
0	-	Covered	T1,T2,T4
1	-	Covered	T1,T2,T4

 LINE       355
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_256)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       357
 EXPRESSION ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512))
             ----------------1---------------    ----------------2---------------

-1-	-2-	Status	Tests
0	0	Not Covered
0	1	Covered	T1,T2,T4
1	0	Covered	T1,T2,T4

 LINE       357
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_384)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       357
 SUB-EXPRESSION (digest_mode_flag_q == SHA2_512)
                ----------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T4
1	Covered	T1,T2,T4

 LINE       368
 EXPRESSION ((hash_start_i || hash_continue_i) ? digest_mode_i : (hash_done_i ? SHA2_None : digest_mode_flag_q))
             ----------------1----------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T4

 LINE       368
 SUB-EXPRESSION (hash_start_i || hash_continue_i)
                 ------1-----    -------2-------

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T2,T4,T5
1	0	Covered	T1,T2,T4

 LINE       368
 SUB-EXPRESSION (hash_done_i ? SHA2_None : digest_mode_flag_q)
                 -----1-----

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T4

 LINE       378
 EXPRESSION ((hash_process_flag_q || hash_stop_flag_q) && (st_q == StIdle))
             --------------------1--------------------    --------2-------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Covered	T1,T2,T4
1	1	Covered	T1,T2,T4

 LINE       378
 SUB-EXPRESSION (hash_process_flag_q || hash_stop_flag_q)
                 ---------1---------    --------2-------

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T2,T4,T5
1	0	Covered	T1,T2,T4

 LINE       378
 SUB-EXPRESSION (st_q == StIdle)
                --------1-------

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

---

FSM Coverage for Instance : tb.dut.u_prim_sha2_512.gen_multimode_logic.u_prim_sha2_multimode.u_pad

Summary for FSM :: st_q

	Total	Covered	Percent
States	6	6	100.00	(Not included in score)
Transitions	11	10	90.91
Sequences	0	0

State, Transition and Sequence Details for FSM :: st_q

---

states	Line No.	Covered	Tests
StFifoReceive	208	Covered	T1,T2,T4
StIdle	200	Covered	T1,T2,T3
StLenHi	258	Covered	T1,T2,T4
StLenLo	314	Covered	T1,T2,T4
StPad00	264	Covered	T1,T2,T4
StPad80	221	Covered	T1,T2,T4

transitions	Line No.	Covered	Tests	Exclude Annotation
StFifoReceive->StIdle	200	Covered	T2,T4,T5
StFifoReceive->StPad80	221	Covered	T1,T2,T4
StIdle->StFifoReceive	208	Covered	T1,T2,T4
StLenHi->StFifoReceive	341	Excluded		[INVALID] Intend to remove transition
StLenHi->StIdle	200	Not Covered
StLenHi->StLenLo	314	Covered	T1,T2,T4
StLenLo->StFifoReceive	341	Excluded		[INVALID] Intend to remove transition
StLenLo->StIdle	200	Covered	T1,T2,T4
StPad00->StFifoReceive	341	Excluded		[INVALID] Intend to remove transition
StPad00->StIdle	200	Covered	T10,T25
StPad00->StLenHi	302	Covered	T1,T2,T4
StPad80->StFifoReceive	341	Excluded		[INVALID] Intend to remove transition
StPad80->StIdle	200	Covered	T11
StPad80->StLenHi	258	Covered	T6,T18,T7
StPad80->StPad00	264	Covered	T1,T2,T4

---

Branch Coverage for Instance : tb.dut.u_prim_sha2_512.gen_multimode_logic.u_prim_sha2_multimode.u_pad

	Line No.	Total	Covered	Percent
Branches		70	65	92.86
TERNARY	60	3	3	100.00
TERNARY	72	3	3	100.00
TERNARY	76	3	3	100.00
TERNARY	368	3	3	100.00
IF	81	2	2	100.00
CASE	101	19	18	94.74
IF	159	1	1	100.00
IF	190	2	2	100.00
CASE	202	21	18	85.71
IF	340	3	3	100.00
IF	348	6	5	83.33
IF	364	2	2	100.00
IF	373	2	2	100.00

60           assign txcnt_eq_1a0 = (digest_mode_flag_q == SHA2_256   || ~MultimodeEn)               ?
                                                                                                    -1-  
                                                                                                    ==>  
61                                                                                 (tx_count[8:0] == 9'h1a0)  :
                                                                                                               
62                                 ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ?
                                                                                                          -2-  
                                                                                                          ==>  
                                                                                                          ==>  

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T4
0	1	Covered	T1,T2,T4
0	0	Covered	T1,T2,T3

72           assign hash_stop_flag_d = (~sha_en_i || hash_go || hash_done_i) ? 1'b0 :
                                                                             -1-  
                                                                             ==>  
73                                     hash_stop_i                           ? 1'b1 :
                                                                             -2-  
                                                                             ==>  
                                                                             ==>  

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T2,T4,T5
0	0	Covered	T1,T2,T3

76           assign hash_process_flag_d = (~sha_en_i || hash_go || hash_done_i) ? 1'b0 :
                                                                                -1-  
                                                                                ==>  
77                                        hash_process_i                        ? 1'b1 :
                                                                                -2-  
                                                                                ==>  
                                                                                ==>  

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T1,T2,T4
0	0	Covered	T1,T2,T3

368          assign digest_mode_flag_d = (hash_start_i || hash_continue_i) ? digest_mode_i  :    // set config
                                                                           -1-  
                                                                           ==>  
369                                      hash_done_i                       ? SHA2_None      :    // clear
                                                                           -2-  
                                                                           ==>  
                                                                           ==>  

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T4
0	1	Covered	T1,T2,T4
0	0	Covered	T1,T2,T3

81             if (!rst_ni) begin
               -1-  
82               hash_stop_flag_q    <= 1'b0;
                 ==>
83               hash_process_flag_q <= 1'b0;
84             end else begin
85               hash_stop_flag_q    <= hash_stop_flag_d;
                 ==>

Branches:

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

101            unique case (sel_data)
                      -1-  
102              FifoIn: begin
103                shaf_rdata_o = fifo_rdata_i.data;
                   ==>
104              end
105        
106              Pad80: begin
107                // {a[7:0], b[7:0], c[7:0], d[7:0]}
108                // msglen[4:3] == 00 |-> {'h80, 'h00, 'h00, 'h00}
109                // msglen[4:3] == 01 |-> {msg,  'h80, 'h00, 'h00}
110                // msglen[4:3] == 10 |-> {msg[15:0],  'h80, 'h00}
111                // msglen[4:3] == 11 |-> {msg[23:0],        'h80}
112                if ((digest_mode_flag_q == SHA2_256) || ~MultimodeEn) begin
                   -2-  
113                  unique case (message_length_i[4:3])
                            -3-  
114                    2'b 00:  shaf_rdata_o = 64'h 0000_0000_8000_0000;
                       ==>
115                    2'b 01:  shaf_rdata_o = {32'h 0000_0000, fifo_rdata_i.data[31:24], 24'h 8000_00};
                       ==>
116                    2'b 10:  shaf_rdata_o = {32'h 0000_0000, fifo_rdata_i.data[31:16], 16'h 8000};
                       ==>
117                    2'b 11:  shaf_rdata_o = {32'h 0000_0000, fifo_rdata_i.data[31: 8],  8'h 80};
                       ==>
118                    default: shaf_rdata_o = 64'h0;
                       ==> (Excluded)
Exclude Annotation: VC_COV_UNR
119                  endcase
120                end else if ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) begin
                            -4-  
121                  unique case (message_length_i[5:3])
                            -5-  
122                    3'b 000: shaf_rdata_o = 64'h 8000_0000_0000_0000;
                       ==>
123                    3'b 001: shaf_rdata_o = {fifo_rdata_i.data[63:56], 56'h 8000_0000_0000_00};
                       ==>
124                    3'b 010: shaf_rdata_o = {fifo_rdata_i.data[63:48], 48'h 8000_0000_0000};
                       ==>
125                    3'b 011: shaf_rdata_o = {fifo_rdata_i.data[63:40], 40'h 8000_0000_00};
                       ==>
126                    3'b 100: shaf_rdata_o = {fifo_rdata_i.data[63:32], 32'h 8000_0000};
                       ==>
127                    3'b 101: shaf_rdata_o = {fifo_rdata_i.data[63:24], 24'h 8000_00};
                       ==>
128                    3'b 110: shaf_rdata_o = {fifo_rdata_i.data[63:16], 16'h 8000};
                       ==>
129                    3'b 111: shaf_rdata_o = {fifo_rdata_i.data[63:8],  8'h 80};
                       ==>
130                    default: shaf_rdata_o = 64'h0;
                       ==> (Excluded)
Exclude Annotation: VC_COV_UNR
131                  endcase
132                end else
133                    shaf_rdata_o = '0;
                       ==>
134              end
135        
136              Pad00: begin
137                shaf_rdata_o = '0;
                   ==>
138              end
139        
140              LenHi: begin
141                shaf_rdata_o = ((digest_mode_flag_q == SHA2_256) || ~MultimodeEn) ?
                                                                                     -6-  
                                                                                     ==>  
142                                                             {32'b0, message_length_i[63:32]}:
                                                                                                 
143                               ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ?
                                                                                                         -7-  
                                                                                                         ==>  
                                                                                                         ==> (Excluded)  
144                                                             message_length_i[127:64] : '0;
145              end
146        
147              LenLo: begin
148                shaf_rdata_o = ((digest_mode_flag_q == SHA2_256) || ~MultimodeEn) ?
                                                                                     -8-  
                                                                                     ==>  
149                                                             {32'b0, message_length_i[31:0]}:
                                                                                                
150                               ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ?
                                                                                                         -9-  
                                                                                                         ==>  
                                                                                                         ==> (Excluded)  
151                                                             message_length_i[63:0]: '0;
152              end
153        
154              default: begin
155                shaf_rdata_o = '0;
                   ==> (Excluded)
Exclude Annotation: VC_COV_UNR

Branches:

-1-	-2-	-3-	-4-	-5-	-6-	-7-	-8-	-9-	Status	Tests	Exclude Annotation
FifoIn	-	-	-	-	-	-	-	-	Covered	T1,T2,T3
Pad80	1	2'b00	-	-	-	-	-	-	Covered	T1,T4,T6
Pad80	1	2'b01	-	-	-	-	-	-	Covered	T1,T2,T4
Pad80	1	2'b10	-	-	-	-	-	-	Covered	T2,T7,T8
Pad80	1	2'b11	-	-	-	-	-	-	Covered	T1,T4,T6
Pad80	1	default	-	-	-	-	-	-	Excluded		VC_COV_UNR
Pad80	0	-	1	3'b000	-	-	-	-	Covered	T1,T2,T4
Pad80	0	-	1	3'b001	-	-	-	-	Covered	T1,T2,T4
Pad80	0	-	1	3'b010	-	-	-	-	Covered	T5,T18,T7
Pad80	0	-	1	3'b011	-	-	-	-	Covered	T4,T18,T7
Pad80	0	-	1	3'b100	-	-	-	-	Covered	T7,T8,T20
Pad80	0	-	1	3'b101	-	-	-	-	Covered	T2,T4,T6
Pad80	0	-	1	3'b110	-	-	-	-	Covered	T18,T7,T21
Pad80	0	-	1	3'b111	-	-	-	-	Covered	T1,T4,T22
Pad80	0	-	1	default	-	-	-	-	Excluded		VC_COV_UNR
Pad80	0	-	0	-	-	-	-	-	Not Covered
Pad00	-	-	-	-	-	-	-	-	Covered	T1,T2,T4
LenHi	-	-	-	-	1	-	-	-	Covered	T1,T2,T4
LenHi	-	-	-	-	0	1	-	-	Covered	T1,T2,T4
LenHi	-	-	-	-	0	0	-	-	Excluded		VC_COV_UNR
LenLo	-	-	-	-	-	-	1	-	Covered	T1,T2,T4
LenLo	-	-	-	-	-	-	0	1	Covered	T1,T2,T4
LenLo	-	-	-	-	-	-	0	0	Excluded		VC_COV_UNR
default	-	-	-	-	-	-	-	-	Excluded		VC_COV_UNR

159            if (!MultimodeEn) shaf_rdata_o [63:32] = 32'b0; // assign most sig 32 bits to constant 0
               -1-  
               ==> (Unreachable)
               MISSING_ELSE
               ==>

Branches:

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

190            if (!rst_ni) st_q <= StIdle;
               -1-  
               ==>
191            else         st_q <= st_d;
               ==>

Branches:

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

202            unique case (st_q)
                      -1-  
203              StIdle: begin
204                sel_data      = FifoIn;
205                shaf_rvalid_o = 1'b0;
206                if (sha_en_i && hash_go) begin
                   -2-  
207                  inc_txcount = 1'b0;
                     ==>
208                  st_d        = StFifoReceive;
209                end else begin
210                  st_d        = StIdle;
                     ==>
211                end
212              end
213        
214              StFifoReceive: begin
215                sel_data = FifoIn;
216                if (fifo_partial && fifo_rvalid_i) begin
                   -3-                     
217                  // End of the message (last bit is not word-aligned) , assume hash_process_flag is set
218                  shaf_rvalid_o = 1'b0; // Update entry at StPad80
                     ==>
219                  inc_txcount   = 1'b0;
220                  fifo_rready_o = 1'b0;
221                  st_d = StPad80;
222                end else if (!hash_process_flag_q) begin
                            -4-  
223                  fifo_rready_o = shaf_rready_i;
                     ==>
224                  shaf_rvalid_o = fifo_rvalid_i;
225                  inc_txcount   = shaf_rready_i;
226                  st_d = StFifoReceive;
227                end else if (txcnt_eq_msg_len) begin
                            -5-  
228                  // already received all msg and was waiting process flag
229                  shaf_rvalid_o = 1'b0;
                     ==>
230                  inc_txcount   = 1'b0;
231                  fifo_rready_o = 1'b0;
232                  st_d = StPad80;
233                end else begin
234                  shaf_rvalid_o = fifo_rvalid_i;
                     ==>
235                  fifo_rready_o = shaf_rready_i; // 0 always
236                  inc_txcount   = shaf_rready_i; // 0 always
237                  st_d = StFifoReceive;
238                end
239        
240                if (txcnt_eq_msg_len && hash_stop_flag_q) begin
                   -6-  
241                  shaf_rvalid_o = 1'b0;
                     ==>
242                  inc_txcount   = 1'b0;
243                  fifo_rready_o = 1'b0;
244                  st_d = StIdle;
245                end
                   MISSING_ELSE
                   ==>
246              end
247        
248              StPad80: begin
249                sel_data      = Pad80;
250                shaf_rvalid_o = 1'b1;
251                fifo_rready_o = (digest_mode_flag_q == SHA2_256 || ~MultimodeEn) ?
                                                                                    -7-  
                                                                                    ==>  
252                                shaf_rready_i && |message_length_i[4:3] :
                                                                            
253                                ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) ?
                                                                                                          -8-  
                                                                                                          ==>  
                                                                                                          ==>  
254                                shaf_rready_i && |message_length_i[5:3] : '0; // Only when partial
255        
256                // exactly 192 bits left, do not need to pad00's
257                if (shaf_rready_i && txcnt_eq_1a0) begin
                   -9-  
258                  st_d        = StLenHi;
                     ==>
259                  inc_txcount = 1'b1;
260                // it does not matter if value is < or > than 416 bits.  If it's the former, 00 pad until
261                // length field.  If >, then the next chunk will contain the length field with appropriate
262                // 0 padding.
263                end else if (shaf_rready_i && !txcnt_eq_1a0) begin
                            -10-  
264                  st_d        = StPad00;
                     ==>
265                  inc_txcount = 1'b1;
266                end else begin
267                  st_d        = StPad80;
                     ==>
268                  inc_txcount = 1'b0;
269                end
270        
271                // # Below part is temporal code to speed up the SHA by 16 clocks per chunk
272                // # (80 clk --> 64 clk)
273                // # leaving this as a reference but needs to verify it.
274                //if (shaf_rready_i && !txcnt_eq_1a0) begin
275                //  st_d = StPad00;
276                //
277                //  inc_txcount = 1'b1;
278                //  shaf_rvalid_o = (msg_word_aligned) ? 1'b1 : fifo_rvalid;
279                //  fifo_rready = (msg_word_aligned) ? 1'b0 : 1'b1;
280                //end else if (!shaf_rready_i && !txcnt_eq_1a0) begin
281                //  st_d = StPad80;
282                //
283                //  inc_txcount = 1'b0;
284                //  shaf_rvalid_o = (msg_word_aligned) ? 1'b1 : fifo_rvalid;
285                //
286                //end else if (shaf_rready_i && txcnt_eq_1a0) begin
287                //  st_d = StLenHi;
288                //  inc_txcount = 1'b1;
289                //end else begin
290                //  // !shaf_rready_i && txcnt_eq_1a0 , just wait until fifo_rready asserted
291                //  st_d = StPad80;
292                //  inc_txcount = 1'b0;
293                //end
294              end
295        
296              StPad00: begin
297                sel_data      = Pad00;
298                shaf_rvalid_o = 1'b1;
299        
300                if (shaf_rready_i) begin
                   -11-  
301                  inc_txcount = 1'b1;
302                  if (txcnt_eq_1a0) st_d = StLenHi;
                     -12-  
                     ==>
303                  else              st_d = StPad00;
                     ==>
304                end else begin
305                  st_d = StPad00;
                     ==>
306                end
307              end
308        
309              StLenHi: begin
310                sel_data      = LenHi;
311                shaf_rvalid_o = 1'b1;
312        
313                if (shaf_rready_i) begin
                   -13-  
314                  st_d = StLenLo;
                     ==>
315                  inc_txcount = 1'b1;
316                end else begin
317                  st_d = StLenHi;
                     ==>
318                  inc_txcount = 1'b0;
319                end
320              end
321        
322              StLenLo: begin
323                sel_data        = LenLo;
324                shaf_rvalid_o   = 1'b1;
325        
326                if (shaf_rready_i) begin
                   -14-  
327                  st_d        = StIdle;
                     ==>
328                  inc_txcount = 1'b1;
329                end else begin
330                  st_d        = StLenLo;
                     ==>
331                  inc_txcount = 1'b0;
332                end
333              end
334        
335              default: begin
336                st_d = StIdle;
                   ==> (Excluded)
Exclude Annotation: VC_COV_UNR

Branches:

-1-	-2-	-3-	-4-	-5-	-6-	-7-	-8-	-9-	-10-	-11-	-12-	-13-	-14-	Status	Tests	Exclude Annotation
StIdle	1	-	-	-	-	-	-	-	-	-	-	-	-	Covered	T1,T2,T4
StIdle	0	-	-	-	-	-	-	-	-	-	-	-	-	Covered	T1,T2,T3
StFifoReceive	-	1	-	-	-	-	-	-	-	-	-	-	-	Covered	T1,T2,T4
StFifoReceive	-	0	1	-	-	-	-	-	-	-	-	-	-	Covered	T1,T2,T4
StFifoReceive	-	0	0	1	-	-	-	-	-	-	-	-	-	Covered	T1,T2,T4
StFifoReceive	-	0	0	0	-	-	-	-	-	-	-	-	-	Covered	T1,T5,T6
StFifoReceive	-	-	-	-	1	-	-	-	-	-	-	-	-	Covered	T2,T4,T5
StFifoReceive	-	-	-	-	0	-	-	-	-	-	-	-	-	Covered	T1,T2,T4
StPad80	-	-	-	-	-	1	-	-	-	-	-	-	-	Covered	T1,T2,T4
StPad80	-	-	-	-	-	0	1	-	-	-	-	-	-	Covered	T1,T2,T4
StPad80	-	-	-	-	-	0	0	-	-	-	-	-	-	Not Covered
StPad80	-	-	-	-	-	-	-	1	-	-	-	-	-	Covered	T6,T18,T7
StPad80	-	-	-	-	-	-	-	0	1	-	-	-	-	Covered	T1,T2,T4
StPad80	-	-	-	-	-	-	-	0	0	-	-	-	-	Covered	T1,T4,T19
StPad00	-	-	-	-	-	-	-	-	-	1	1	-	-	Covered	T1,T2,T4
StPad00	-	-	-	-	-	-	-	-	-	1	0	-	-	Covered	T1,T2,T4
StPad00	-	-	-	-	-	-	-	-	-	0	-	-	-	Covered	T1,T2,T4
StLenHi	-	-	-	-	-	-	-	-	-	-	-	1	-	Covered	T1,T2,T4
StLenHi	-	-	-	-	-	-	-	-	-	-	-	0	-	Not Covered
StLenLo	-	-	-	-	-	-	-	-	-	-	-	-	1	Covered	T1,T2,T4
StLenLo	-	-	-	-	-	-	-	-	-	-	-	-	0	Not Covered
default	-	-	-	-	-	-	-	-	-	-	-	-	-	Excluded		VC_COV_UNR

340            if (!sha_en_i)    st_d = StIdle;
               -1-  
               ==>
341            else if (hash_go) st_d = StFifoReceive;
                    -2-                       
               ==>
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T1,T2,T4
0	0	Covered	T1,T2,T3

348            if (hash_start_i) begin
               -1-  
349              // When starting a fresh hash, initialize the data counter to zero.
350              tx_count_d = '0;
                 ==>
351            end else if (hash_continue_i) begin
                        -2-  
352              // When continuing to hash, set the data counter to the current message length.
353              tx_count_d = message_length_i;
                 ==>
354            end else if (inc_txcount) begin
                        -3-  
355              if ((digest_mode_flag_q == SHA2_256) || !MultimodeEn) begin
                 -4-  
356                tx_count_d[127:5] = tx_count[127:5] + 1'b1;
                   ==>
357              end else if ((digest_mode_flag_q == SHA2_384) || (digest_mode_flag_q == SHA2_512)) begin
                          -5-  
358                tx_count_d[127:6] = tx_count[127:6] + 1'b1;
                   ==>
359              end
                 MISSING_ELSE
                 ==>
360            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	-3-	-4-	-5-	Status	Tests
1	-	-	-	-	Covered	T1,T2,T4
0	1	-	-	-	Covered	T2,T4,T5
0	0	1	1	-	Covered	T1,T2,T4
0	0	1	0	1	Covered	T1,T2,T4
0	0	1	0	0	Not Covered
0	0	0	-	-	Covered	T1,T2,T3

364            if (!rst_ni) tx_count <= '0;
               -1-  
               ==>
365            else         tx_count <= tx_count_d;
               ==>

Branches:

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

373            if (!rst_ni)  digest_mode_flag_q <= SHA2_None;
               -1-  
               ==>
374            else          digest_mode_flag_q <= digest_mode_flag_d;
               ==>

Branches:

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