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[/] [cavlc/] [trunk/] [rtl/] [cavlc_read_levels.v] - Blame information for rev 6

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//2011-8-6      initiial revision
//2011-8-19     reverse the order of level
 
//  include TrailingOnes
 
`include "defines.v"
 
module cavlc_read_levels (
        clk,
        rst_n,
        ena,
        t1s_sel,
        prefix_sel,
        suffix_sel,
        calc_sel,
        TrailingOnes,
        TotalCoeff,
        rbsp,
        i,
        level_0, level_1, level_2, level_3, level_4, level_5, level_6, level_7,
        level_8, level_9, level_10, level_11, level_12, level_13, level_14, level_15,
        len_comb
);
//------------------------
// ports
//------------------------
input   clk;
input   rst_n;
 
input   ena;
input   t1s_sel;
input   prefix_sel;
input   suffix_sel;
input   calc_sel;
 
input   [1:0]    TrailingOnes;
input   [4:0]    TotalCoeff;
input   [0:15]   rbsp;
input   [3:0]    i;
 
output  [8:0]    level_0, level_1, level_2, level_3, level_4, level_5, level_6, level_7;
output  [8:0]    level_8, level_9, level_10, level_11, level_12, level_13, level_14, level_15;
output  [4:0]    len_comb;
 
//------------------------
//  regs
//------------------------
reg             [0:15]   rbsp_prefix;            //for level_prefix_comb
reg             [3:0]    level_prefix_comb;
reg             [8:0]    level_suffix;
reg             [4:0]    len_comb;
 
//------------------------
// FFs
//------------------------
reg     [3:0]    level_prefix;
reg             [2:0]    suffixLength;   // range from 0 to 6
reg             [8:0]    level;
reg             [8:0]    level_abs;
reg             [8:0]    level_code_tmp;
reg             [8:0]    level_0, level_1, level_2, level_3, level_4, level_5, level_6, level_7;
reg             [8:0]    level_8, level_9, level_10, level_11, level_12, level_13, level_14, level_15;
 
//------------------------
// level_prefix_comb
//------------------------
wire    level_prefix_refresh;
assign level_prefix_refresh = (prefix_sel && ena);
 
always @(level_prefix_refresh or rbsp)
if (level_prefix_refresh)
        rbsp_prefix <= rbsp;
else
        rbsp_prefix <= 'hffff;
 
always @(*)
if (rbsp_prefix[0])              level_prefix_comb <= 0;
else if (rbsp_prefix[1])        level_prefix_comb <= 1;
else if (rbsp_prefix[2])        level_prefix_comb <= 2;
else if (rbsp_prefix[3])        level_prefix_comb <= 3;
else if (rbsp_prefix[4])        level_prefix_comb <= 4;
else if (rbsp_prefix[5])        level_prefix_comb <= 5;
else if (rbsp_prefix[6])        level_prefix_comb <= 6;
else if (rbsp_prefix[7])        level_prefix_comb <= 7;
else if (rbsp_prefix[8])        level_prefix_comb <= 8;
else if (rbsp_prefix[9])        level_prefix_comb <= 9;
else if (rbsp_prefix[10])       level_prefix_comb <= 10;
else if (rbsp_prefix[11])       level_prefix_comb <= 11;
else if (rbsp_prefix[12])       level_prefix_comb <= 12;
else if (rbsp_prefix[13])       level_prefix_comb <= 13;
else if (rbsp_prefix[14])       level_prefix_comb <= 14;
else if (rbsp_prefix[15])       level_prefix_comb <= 15;
else                                            level_prefix_comb <= 'bx;
 
 
//------------------------
// level_prefix
//------------------------
always @(posedge clk or negedge rst_n)
if (~rst_n)
        level_prefix <= 0;
else if (level_prefix_refresh) begin
        level_prefix <= level_prefix_comb;
end
 
//------------------------
// suffixLength
//------------------------
wire first_level;
assign first_level = (i == TotalCoeff - TrailingOnes - 1);
 
wire suffixLength_refresh;
assign suffixLength_refresh = prefix_sel && ena;
 
always @(posedge clk or negedge rst_n)
if (~rst_n) begin
        suffixLength <= 0;
end
else if (suffixLength_refresh) begin
        if (TotalCoeff > 10 && TrailingOnes < 3 && first_level )        //initialize suffixLength before proceeding first level_suffix
                suffixLength <= 1;
        else if (first_level)
                suffixLength <= 0;
        else if (suffixLength == 0 && level_abs > 2'd3)
                suffixLength <= 2;
        else if (suffixLength == 0)
                suffixLength <= 1;
        else if (  level_abs > (2'd3 << (suffixLength - 1'b1) ) && suffixLength < 6)
                suffixLength <= suffixLength + 1'b1;
end
 
 
//------------------------
// level_suffix
//------------------------
wire level_suffix_refresh;
assign level_suffix_refresh = suffix_sel && ena;
 
always @(*)
if (level_suffix_refresh) begin
        if (suffixLength > 0 && level_prefix <= 14) begin
                level_suffix <= {3'b0, rbsp[0:5] >> (3'd6 - suffixLength)};
        end
        else if (level_prefix == 14) begin      //level_prefix == 14 && suffixLength == 0
                level_suffix <= {3'b0, rbsp[0:3] };
        end
        else if (level_prefix == 15) begin
                level_suffix <= rbsp[3:11];
        end
        else begin
                level_suffix <= 0;
        end
end
else begin
        level_suffix <= 0;
end
 
//------------------------
// level_code_tmp
//------------------------
always @(posedge clk or negedge rst_n)
if (~rst_n) begin
        level_code_tmp <=  0;
end
else if (level_suffix_refresh) begin
        level_code_tmp <= (level_prefix << suffixLength) + level_suffix +
        ((suffixLength == 0 && level_prefix == 15) ? 4'd15 : 0);
end
 
 
//------------------------
// level
//------------------------
wire    [2:0]    tmp1;
 
assign tmp1 = (first_level && TrailingOnes < 3)? 2'd2 : 2'd0;
 
always @(*)
begin
        if (level_code_tmp % 2 == 0) begin
                level <= ( level_code_tmp + tmp1 + 2 ) >> 1;
        end
        else begin
                level <= (-level_code_tmp - tmp1 - 1 ) >> 1;
        end
end
 
//------------------------
// level_abs
//------------------------
wire level_abs_refresh;
assign level_abs_refresh = calc_sel && ena;
 
always @(posedge clk or negedge rst_n)
if (~rst_n) begin
        level_abs <= 0;
end
else if (level_abs_refresh) begin
        level_abs <= level[8] ? -level : level;
end
 
//------------------------
// level regfile
//------------------------
always @ (posedge clk or negedge rst_n)
if (!rst_n) begin
        level_0 <= 0;    level_1 <= 0;    level_2 <= 0;    level_3 <= 0;
        level_4 <= 0;    level_5 <= 0;    level_6 <= 0;    level_7 <= 0;
        level_8 <= 0;    level_9 <= 0;    level_10<= 0;    level_11<= 0;
        level_12<= 0;    level_13<= 0;    level_14<= 0;    level_15<= 0;
end
else if (t1s_sel && ena)
        case (i)
 
        1 : begin
                        level_1 <= rbsp[0]? -1 : 1;
                        if (TrailingOnes[1])
                                level_0 <= rbsp[1]? -1 : 1;
                end
        2 : begin
                        level_2 <= rbsp[0]? -1 : 1;
                        if (TrailingOnes[1])
                                level_1 <= rbsp[1]? -1 : 1;
                        if (TrailingOnes == 3)
                                level_0 <= rbsp[2]? -1 : 1;
                end
        3 : begin
                        level_3 <= rbsp[0]? -1 : 1;
                        if (TrailingOnes[1])
                                level_2 <= rbsp[1]? -1 : 1;
                        if (TrailingOnes == 3)
                                level_1 <= rbsp[2]? -1 : 1;
                end
        4 : begin
                        level_4 <= rbsp[0]? -1 : 1;
                        if (TrailingOnes[1])
                                level_3 <= rbsp[1]? -1 : 1;
                        if (TrailingOnes == 3)
                                level_2 <= rbsp[2]? -1 : 1;
                end
        5 : begin
                        level_5 <= rbsp[0]? -1 : 1;
                        if (TrailingOnes[1])
                                level_4 <= rbsp[1]? -1 : 1;
                        if (TrailingOnes == 3)
                                level_3 <= rbsp[2]? -1 : 1;
                end
        6 : begin
                        level_6 <= rbsp[0]? -1 : 1;
                        if (TrailingOnes[1])
                                level_5 <= rbsp[1]? -1 : 1;
                        if (TrailingOnes == 3)
                                level_4 <= rbsp[2]? -1 : 1;
                end
        7 : begin
                        level_7 <= rbsp[0]? -1 : 1;
                        if (TrailingOnes[1])
                                level_6 <= rbsp[1]? -1 : 1;
                        if (TrailingOnes == 3)
                                level_5 <= rbsp[2]? -1 : 1;
                end
        8 : begin
                        level_8 <= rbsp[0]? -1 : 1;
                        if (TrailingOnes[1])
                                level_7 <= rbsp[1]? -1 : 1;
                        if (TrailingOnes == 3)
                                level_6 <= rbsp[2]? -1 : 1;
                end
        9 : begin
                        level_9 <= rbsp[0]? -1 : 1;
                        if (TrailingOnes[1])
                                level_8 <= rbsp[1]? -1 : 1;
                        if (TrailingOnes == 3)
                                level_7 <= rbsp[2]? -1 : 1;
                end
        10: begin
                        level_10 <= rbsp[0]? -1 : 1;
                        if (TrailingOnes[1])
                                level_9 <= rbsp[1]? -1 : 1;
                        if (TrailingOnes == 3)
                                level_8 <= rbsp[2]? -1 : 1;
                end
        11: begin
                        level_11 <= rbsp[0]? -1 : 1;
                        if (TrailingOnes[1])
                                level_10 <= rbsp[1]? -1 : 1;
                        if (TrailingOnes == 3)
                                level_9 <= rbsp[2]? -1 : 1;
                end
        12: begin
                        level_12 <= rbsp[0]? -1 : 1;
                        if (TrailingOnes[1])
                                level_11 <= rbsp[1]? -1 : 1;
                        if (TrailingOnes == 3)
                                level_10 <= rbsp[2]? -1 : 1;
                end
        13: begin
                        level_13 <= rbsp[0]? -1 : 1;
                        if (TrailingOnes[1])
                                level_12 <= rbsp[1]? -1 : 1;
                        if (TrailingOnes == 3)
                                level_11 <= rbsp[2]? -1 : 1;
                end
        14: begin
                        level_14 <= rbsp[0]? -1 : 1;
                        if (TrailingOnes[1])
                                level_13 <= rbsp[1]? -1 : 1;
                        if (TrailingOnes == 3)
                                level_12 <= rbsp[2]? -1 : 1;
                end
        15: begin
                        level_15 <= rbsp[0]? -1 : 1;
                        if (TrailingOnes[1])
                                level_14 <= rbsp[1]? -1 : 1;
                        if (TrailingOnes == 3)
                                level_13 <= rbsp[2]? -1 : 1;
                end
endcase
else if (calc_sel && ena)
case (i)
 
        1 :level_1 <= level;
        2 :level_2 <= level;
        3 :level_3 <= level;
        4 :level_4 <= level;
        5 :level_5 <= level;
        6 :level_6 <= level;
        7 :level_7 <= level;
        8 :level_8 <= level;
        9 :level_9 <= level;
        10:level_10<= level;
        11:level_11<= level;
        12:level_12<= level;
        13:level_13<= level;
        14:level_14<= level;
        15:level_15<= level;
endcase
 
always @(*)
if(t1s_sel)
        len_comb <= TrailingOnes;
else if(prefix_sel)
        len_comb <= level_prefix_comb + 1;
else if(suffix_sel && suffixLength > 0 && level_prefix <= 14)
        len_comb <= suffixLength;
else if(suffix_sel && level_prefix == 14)
        len_comb <= 4;
else if(suffix_sel && level_prefix == 15)
        len_comb <= 12;
else
        len_comb <= 0;
 
endmodule

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[/] [cavlc/] [trunk/] [rtl/] [cavlc_read_levels.v] - Blame information for rev 6

Line No.	Rev	Author	Line
1	6	qiubin	`//2011-8-6 initiial revision`
2			`//2011-8-19 reverse the order of level`
3
4			`// include TrailingOnes`
5
6			`include "defines.v"
7
8			`module cavlc_read_levels (`
9			`clk,`
10			`rst_n,`
11			`ena,`
12			`t1s_sel,`
13			`prefix_sel,`
14			`suffix_sel,`
15			`calc_sel,`
16			`TrailingOnes,`
17			`TotalCoeff,`
18			`rbsp,`
19			`i,`
20			`level_0, level_1, level_2, level_3, level_4, level_5, level_6, level_7,`
21			`level_8, level_9, level_10, level_11, level_12, level_13, level_14, level_15,`
22			`len_comb`
23			`);`
24			`//------------------------`
25			`// ports`
26			`//------------------------`
27			`input clk;`
28			`input rst_n;`
29
30			`input ena;`
31			`input t1s_sel;`
32			`input prefix_sel;`
33			`input suffix_sel;`
34			`input calc_sel;`
35
36			`input [1:0] TrailingOnes;`
37			`input [4:0] TotalCoeff;`
38			`input [0:15] rbsp;`
39			`input [3:0] i;`
40
41			`output [8:0] level_0, level_1, level_2, level_3, level_4, level_5, level_6, level_7;`
42			`output [8:0] level_8, level_9, level_10, level_11, level_12, level_13, level_14, level_15;`
43			`output [4:0] len_comb;`
44
45			`//------------------------`
46			`// regs`
47			`//------------------------`
48			`reg [0:15] rbsp_prefix; //for level_prefix_comb`
49			`reg [3:0] level_prefix_comb;`
50			`reg [8:0] level_suffix;`
51			`reg [4:0] len_comb;`
52
53			`//------------------------`
54			`// FFs`
55			`//------------------------`
56			`reg [3:0] level_prefix;`
57			`reg [2:0] suffixLength; // range from 0 to 6`
58			`reg [8:0] level;`
59			`reg [8:0] level_abs;`
60			`reg [8:0] level_code_tmp;`
61			`reg [8:0] level_0, level_1, level_2, level_3, level_4, level_5, level_6, level_7;`
62			`reg [8:0] level_8, level_9, level_10, level_11, level_12, level_13, level_14, level_15;`
63
64			`//------------------------`
65			`// level_prefix_comb`
66			`//------------------------`
67			`wire level_prefix_refresh;`
68			`assign level_prefix_refresh = (prefix_sel && ena);`
69
70			`always @(level_prefix_refresh or rbsp)`
71			`if (level_prefix_refresh)`
72			`rbsp_prefix <= rbsp;`
73			`else`
74			`rbsp_prefix <= 'hffff;`
75
76			`always @(*)`
77			`if (rbsp_prefix[0]) level_prefix_comb <= 0;`
78			`else if (rbsp_prefix[1]) level_prefix_comb <= 1;`
79			`else if (rbsp_prefix[2]) level_prefix_comb <= 2;`
80			`else if (rbsp_prefix[3]) level_prefix_comb <= 3;`
81			`else if (rbsp_prefix[4]) level_prefix_comb <= 4;`
82			`else if (rbsp_prefix[5]) level_prefix_comb <= 5;`
83			`else if (rbsp_prefix[6]) level_prefix_comb <= 6;`
84			`else if (rbsp_prefix[7]) level_prefix_comb <= 7;`
85			`else if (rbsp_prefix[8]) level_prefix_comb <= 8;`
86			`else if (rbsp_prefix[9]) level_prefix_comb <= 9;`
87			`else if (rbsp_prefix[10]) level_prefix_comb <= 10;`
88			`else if (rbsp_prefix[11]) level_prefix_comb <= 11;`
89			`else if (rbsp_prefix[12]) level_prefix_comb <= 12;`
90			`else if (rbsp_prefix[13]) level_prefix_comb <= 13;`
91			`else if (rbsp_prefix[14]) level_prefix_comb <= 14;`
92			`else if (rbsp_prefix[15]) level_prefix_comb <= 15;`
93			`else level_prefix_comb <= 'bx;`
94
95
96			`//------------------------`
97			`// level_prefix`
98			`//------------------------`
99			`always @(posedge clk or negedge rst_n)`
100			`if (~rst_n)`
101			`level_prefix <= 0;`
102			`else if (level_prefix_refresh) begin`
103			`level_prefix <= level_prefix_comb;`
104			`end`
105
106			`//------------------------`
107			`// suffixLength`
108			`//------------------------`
109			`wire first_level;`
110			`assign first_level = (i == TotalCoeff - TrailingOnes - 1);`
111
112			`wire suffixLength_refresh;`
113			`assign suffixLength_refresh = prefix_sel && ena;`
114
115			`always @(posedge clk or negedge rst_n)`
116			`if (~rst_n) begin`
117			`suffixLength <= 0;`
118			`end`
119			`else if (suffixLength_refresh) begin`
120			`if (TotalCoeff > 10 && TrailingOnes < 3 && first_level ) //initialize suffixLength before proceeding first level_suffix`
121			`suffixLength <= 1;`
122			`else if (first_level)`
123			`suffixLength <= 0;`
124			`else if (suffixLength == 0 && level_abs > 2'd3)`
125			`suffixLength <= 2;`
126			`else if (suffixLength == 0)`
127			`suffixLength <= 1;`
128			`else if ( level_abs > (2'd3 << (suffixLength - 1'b1) ) && suffixLength < 6)`
129			`suffixLength <= suffixLength + 1'b1;`
130			`end`
131
132
133			`//------------------------`
134			`// level_suffix`
135			`//------------------------`
136			`wire level_suffix_refresh;`
137			`assign level_suffix_refresh = suffix_sel && ena;`
138
139			`always @(*)`
140			`if (level_suffix_refresh) begin`
141			`if (suffixLength > 0 && level_prefix <= 14) begin`
142			`level_suffix <= {3'b0, rbsp[0:5] >> (3'd6 - suffixLength)};`
143			`end`
144			`else if (level_prefix == 14) begin //level_prefix == 14 && suffixLength == 0`
145			`level_suffix <= {3'b0, rbsp[0:3] };`
146			`end`
147			`else if (level_prefix == 15) begin`
148			`level_suffix <= rbsp[3:11];`
149			`end`
150			`else begin`
151			`level_suffix <= 0;`
152			`end`
153			`end`
154			`else begin`
155			`level_suffix <= 0;`
156			`end`
157
158			`//------------------------`
159			`// level_code_tmp`
160			`//------------------------`
161			`always @(posedge clk or negedge rst_n)`
162			`if (~rst_n) begin`
163			`level_code_tmp <= 0;`
164			`end`
165			`else if (level_suffix_refresh) begin`
166			`level_code_tmp <= (level_prefix << suffixLength) + level_suffix +`
167			`((suffixLength == 0 && level_prefix == 15) ? 4'd15 : 0);`
168			`end`
169
170
171			`//------------------------`
172			`// level`
173			`//------------------------`
174			`wire [2:0] tmp1;`
175
176			`assign tmp1 = (first_level && TrailingOnes < 3)? 2'd2 : 2'd0;`
177
178			`always @(*)`
179			`begin`
180			`if (level_code_tmp % 2 == 0) begin`
181			`level <= ( level_code_tmp + tmp1 + 2 ) >> 1;`
182			`end`
183			`else begin`
184			`level <= (-level_code_tmp - tmp1 - 1 ) >> 1;`
185			`end`
186			`end`
187
188			`//------------------------`
189			`// level_abs`
190			`//------------------------`
191			`wire level_abs_refresh;`
192			`assign level_abs_refresh = calc_sel && ena;`
193
194			`always @(posedge clk or negedge rst_n)`
195			`if (~rst_n) begin`
196			`level_abs <= 0;`
197			`end`
198			`else if (level_abs_refresh) begin`
199			`level_abs <= level[8] ? -level : level;`
200			`end`
201
202			`//------------------------`
203			`// level regfile`
204			`//------------------------`
205			`always @ (posedge clk or negedge rst_n)`
206			`if (!rst_n) begin`
207			`level_0 <= 0; level_1 <= 0; level_2 <= 0; level_3 <= 0;`
208			`level_4 <= 0; level_5 <= 0; level_6 <= 0; level_7 <= 0;`
209			`level_8 <= 0; level_9 <= 0; level_10<= 0; level_11<= 0;`
210			`level_12<= 0; level_13<= 0; level_14<= 0; level_15<= 0;`
211			`end`
212			`else if (t1s_sel && ena)`
213			`case (i)`
214
215			`1 : begin`
216			`level_1 <= rbsp[0]? -1 : 1;`
217			`if (TrailingOnes[1])`
218			`level_0 <= rbsp[1]? -1 : 1;`
219			`end`
220			`2 : begin`
221			`level_2 <= rbsp[0]? -1 : 1;`
222			`if (TrailingOnes[1])`
223			`level_1 <= rbsp[1]? -1 : 1;`
224			`if (TrailingOnes == 3)`
225			`level_0 <= rbsp[2]? -1 : 1;`
226			`end`
227			`3 : begin`
228			`level_3 <= rbsp[0]? -1 : 1;`
229			`if (TrailingOnes[1])`
230			`level_2 <= rbsp[1]? -1 : 1;`
231			`if (TrailingOnes == 3)`
232			`level_1 <= rbsp[2]? -1 : 1;`
233			`end`
234			`4 : begin`
235			`level_4 <= rbsp[0]? -1 : 1;`
236			`if (TrailingOnes[1])`
237			`level_3 <= rbsp[1]? -1 : 1;`
238			`if (TrailingOnes == 3)`
239			`level_2 <= rbsp[2]? -1 : 1;`
240			`end`
241			`5 : begin`
242			`level_5 <= rbsp[0]? -1 : 1;`
243			`if (TrailingOnes[1])`
244			`level_4 <= rbsp[1]? -1 : 1;`
245			`if (TrailingOnes == 3)`
246			`level_3 <= rbsp[2]? -1 : 1;`
247			`end`
248			`6 : begin`
249			`level_6 <= rbsp[0]? -1 : 1;`
250			`if (TrailingOnes[1])`
251			`level_5 <= rbsp[1]? -1 : 1;`
252			`if (TrailingOnes == 3)`
253			`level_4 <= rbsp[2]? -1 : 1;`
254			`end`
255			`7 : begin`
256			`level_7 <= rbsp[0]? -1 : 1;`
257			`if (TrailingOnes[1])`
258			`level_6 <= rbsp[1]? -1 : 1;`
259			`if (TrailingOnes == 3)`
260			`level_5 <= rbsp[2]? -1 : 1;`
261			`end`
262			`8 : begin`
263			`level_8 <= rbsp[0]? -1 : 1;`
264			`if (TrailingOnes[1])`
265			`level_7 <= rbsp[1]? -1 : 1;`
266			`if (TrailingOnes == 3)`
267			`level_6 <= rbsp[2]? -1 : 1;`
268			`end`
269			`9 : begin`
270			`level_9 <= rbsp[0]? -1 : 1;`
271			`if (TrailingOnes[1])`
272			`level_8 <= rbsp[1]? -1 : 1;`
273			`if (TrailingOnes == 3)`
274			`level_7 <= rbsp[2]? -1 : 1;`
275			`end`
276			`10: begin`
277			`level_10 <= rbsp[0]? -1 : 1;`
278			`if (TrailingOnes[1])`
279			`level_9 <= rbsp[1]? -1 : 1;`
280			`if (TrailingOnes == 3)`
281			`level_8 <= rbsp[2]? -1 : 1;`
282			`end`
283			`11: begin`
284			`level_11 <= rbsp[0]? -1 : 1;`
285			`if (TrailingOnes[1])`
286			`level_10 <= rbsp[1]? -1 : 1;`
287			`if (TrailingOnes == 3)`
288			`level_9 <= rbsp[2]? -1 : 1;`
289			`end`
290			`12: begin`
291			`level_12 <= rbsp[0]? -1 : 1;`
292			`if (TrailingOnes[1])`
293			`level_11 <= rbsp[1]? -1 : 1;`
294			`if (TrailingOnes == 3)`
295			`level_10 <= rbsp[2]? -1 : 1;`
296			`end`
297			`13: begin`
298			`level_13 <= rbsp[0]? -1 : 1;`
299			`if (TrailingOnes[1])`
300			`level_12 <= rbsp[1]? -1 : 1;`
301			`if (TrailingOnes == 3)`
302			`level_11 <= rbsp[2]? -1 : 1;`
303			`end`
304			`14: begin`
305			`level_14 <= rbsp[0]? -1 : 1;`
306			`if (TrailingOnes[1])`
307			`level_13 <= rbsp[1]? -1 : 1;`
308			`if (TrailingOnes == 3)`
309			`level_12 <= rbsp[2]? -1 : 1;`
310			`end`
311			`15: begin`
312			`level_15 <= rbsp[0]? -1 : 1;`
313			`if (TrailingOnes[1])`
314			`level_14 <= rbsp[1]? -1 : 1;`
315			`if (TrailingOnes == 3)`
316			`level_13 <= rbsp[2]? -1 : 1;`
317			`end`
318			`endcase`
319			`else if (calc_sel && ena)`
320			`case (i)`
321
322			`1 :level_1 <= level;`
323			`2 :level_2 <= level;`
324			`3 :level_3 <= level;`
325			`4 :level_4 <= level;`
326			`5 :level_5 <= level;`
327			`6 :level_6 <= level;`
328			`7 :level_7 <= level;`
329			`8 :level_8 <= level;`
330			`9 :level_9 <= level;`
331			`10:level_10<= level;`
332			`11:level_11<= level;`
333			`12:level_12<= level;`
334			`13:level_13<= level;`
335			`14:level_14<= level;`
336			`15:level_15<= level;`
337			`endcase`
338
339			`always @(*)`
340			`if(t1s_sel)`
341			`len_comb <= TrailingOnes;`
342			`else if(prefix_sel)`
343			`len_comb <= level_prefix_comb + 1;`
344			`else if(suffix_sel && suffixLength > 0 && level_prefix <= 14)`
345			`len_comb <= suffixLength;`
346			`else if(suffix_sel && level_prefix == 14)`
347			`len_comb <= 4;`
348			`else if(suffix_sel && level_prefix == 15)`
349			`len_comb <= 12;`
350			`else`
351			`len_comb <= 0;`
352
353			`endmodule`