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1 36 diegovalve
`timescale 1ns / 1ps
2
`include "aDefinitions.v"
3
/**********************************************************************************
4
Theia, Ray Cast Programable graphic Processing Unit.
5
Copyright (C) 2010  Diego Valverde (diego.valverde.g@gmail.com)
6
 
7
This program is free software; you can redistribute it and/or
8
modify it under the terms of the GNU General Public License
9
as published by the Free Software Foundation; either version 2
10
of the License, or (at your option) any later version.
11
 
12
This program is distributed in the hope that it will be useful,
13
but WITHOUT ANY WARRANTY; without even the implied warranty of
14
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15
GNU General Public License for more details.
16
 
17
You should have received a copy of the GNU General Public License
18
along with this program; if not, write to the Free Software
19
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
20
 
21
***********************************************************************************/
22
//------------------------------------------------
23
module FFD_POSEDGE_ASYNC_RESET # ( parameter SIZE=`WIDTH )
24
        (
25
        input wire Clock,
26
        input wire Clear,
27
        input wire [SIZE-1:0] D,
28
        output reg [SIZE-1:0] Q
29
        );
30
 
31
  always @(posedge Clock or posedge Clear)
32
    begin
33
           if (Clear)
34
        Q = 0;
35
      else
36
        Q = D;
37
    end
38
endmodule
39
//----------------------------------------------------
40
module FFD_POSEDGE_SYNCRONOUS_RESET # ( parameter SIZE=`WIDTH )
41
(
42
        input wire                              Clock,
43
        input wire                              Reset,
44
        input wire                              Enable,
45
        input wire [SIZE-1:0]    D,
46
        output reg [SIZE-1:0]    Q
47
);
48
 
49
 
50
always @ (posedge Clock)
51
begin
52
        if ( Reset )
53
                Q <= `WIDTH'b0;
54
        else
55
        begin
56
                if (Enable)
57
                        Q <= D;
58
        end
59
 
60
end//always
61
 
62
endmodule
63
//------------------------------------------------
64
module UPCOUNTER_POSEDGE # (parameter SIZE=`WIDTH)
65
(
66
input wire Clock, Reset,
67
input wire [SIZE-1:0] Initial,
68
input wire Enable,
69
output reg [SIZE-1:0] Q
70
);
71
 
72
 
73
  always @(posedge Clock )
74
  begin
75
      if (Reset)
76
        Q = Initial;
77
      else
78
                begin
79
                if (Enable)
80
                        Q = Q + 1;
81
 
82
                end
83
  end
84
 
85
endmodule
86 70 diegovalve
 
87 76 diegovalve
 
88 36 diegovalve
module MUXFULLPARALELL_2SEL_GENERIC # ( parameter SIZE=`WIDTH )
89
 (
90
 input wire [1:0] Sel,
91 76 diegovalve
 input wire [SIZE-1:0]I1, I2, I3,I4,
92 36 diegovalve
 output reg [SIZE-1:0] O1
93
 );
94
 
95
always @( * )
96
 
97
  begin
98
 
99
    case (Sel)
100
 
101
      2'b00: O1 = I1;
102
      2'b01: O1 = I2;
103 76 diegovalve
                2'b10: O1 = I3;
104
                2'b11: O1 = I4;
105 36 diegovalve
                default: O1 = SIZE-1'b0;
106
 
107
    endcase
108
 
109
  end
110
 
111
endmodule
112
 
113 76 diegovalve
//--------
114
module CIRCULAR_SHIFTLEFT_POSEDGE_EX # ( parameter SIZE=`WIDTH )
115
( input wire Clock,
116
  input wire Reset,
117
  input wire[SIZE-1:0] Initial,
118
  input wire      Enable,
119
  output wire[SIZE-1:0] O
120
);
121
 
122
reg [SIZE-1:0] tmp;
123
 
124
 
125
  always @(posedge Clock)
126
  begin
127
  if (Reset)
128
                tmp <= Initial;
129
        else
130
        begin
131
                if (Enable)
132
                begin
133
                        if (tmp[SIZE-1])
134
                                tmp <= Initial;
135
                        else
136
                                tmp <= tmp << 1;
137
                end
138
        end
139
  end
140
 
141
 
142
    assign O  = tmp;
143
endmodule
144 36 diegovalve
//------------------------------------------------
145
module MUXFULLPARALELL_3SEL_WALKINGONE # ( parameter SIZE=`WIDTH )
146
 (
147
 input wire [2:0] Sel,
148
 input wire [SIZE-1:0]I1, I2, I3,
149
 output reg [SIZE-1:0] O1
150
 );
151
 
152
always @( * )
153
 
154
  begin
155
 
156
    case (Sel)
157
 
158
      3'b001: O1 = I1;
159
      3'b010: O1 = I2;
160
                3'b100: O1 = I3;
161
                default: O1 = SIZE-1'b0;
162
 
163
    endcase
164
 
165
  end
166
 
167
endmodule
168
//------------------------------------------------
169
module SHIFTLEFT_POSEDGE # ( parameter SIZE=`WIDTH )
170
( input wire Clock,
171
  input wire Reset,
172
  input wire[SIZE-1:0] Initial,
173
  input wire      Enable,
174
  output wire[SIZE-1:0] O
175
);
176
 
177
reg [SIZE-1:0] tmp;
178
 
179
 
180
  always @(posedge Clock)
181
  begin
182
  if (Reset)
183
                tmp <= Initial;
184
        else
185
        begin
186
                if (Enable)
187
                        tmp <= tmp << 1;
188
        end
189
  end
190
 
191
 
192
    assign O  = tmp;
193
endmodule
194
//------------------------------------------------
195
//------------------------------------------------
196
module CIRCULAR_SHIFTLEFT_POSEDGE # ( parameter SIZE=`WIDTH )
197
( input wire Clock,
198
  input wire Reset,
199
  input wire[SIZE-1:0] Initial,
200
  input wire      Enable,
201
  output wire[SIZE-1:0] O
202
);
203
 
204
reg [SIZE-1:0] tmp;
205
 
206
 
207
  always @(posedge Clock)
208
  begin
209
  if (Reset || tmp[SIZE-1])
210
                tmp <= Initial;
211
        else
212
        begin
213
                if (Enable)
214
                        tmp <= tmp << 1;
215
        end
216
  end
217
 
218
 
219
    assign O  = tmp;
220
endmodule
221
//-----------------------------------------------------------
222
/*
223
        Sorry forgot how this flop is called.
224
        Any way Truth table is this
225
 
226
        Q       S       Q_next R
227
 
228
 
229
        1       0        1                0
230
        1       1       1                0
231
        X       X       0                 1
232
 
233
        The idea is that it toggles from 0 to 1 when S = 1, but if it
234
        gets another S = 1, it keeps the output to 1.
235
*/
236
module FFToggleOnce_1Bit
237
(
238
        input wire Clock,
239
        input wire Reset,
240
        input wire Enable,
241
        input wire S,
242
        output reg Q
243
 
244
);
245
 
246
 
247
reg Q_next;
248
 
249
always @ (negedge Clock)
250
begin
251
        Q <= Q_next;
252
end
253
 
254
always @ ( posedge Clock )
255
begin
256
        if (Reset)
257
                Q_next <= 0;
258
        else if (Enable)
259
                Q_next <= (S && !Q) || Q;
260
        else
261
                Q_next <= Q;
262
end
263
endmodule
264
 
265
//--------------------------------------------------------------
266
//************************OLD MODS***************************//
267
//************************OLD MODS***************************//
268
//************************OLD MODS***************************//
269
//************************OLD MODS***************************//
270
//-----------------------------------------------------------
271
 
272
/*
273
module UpCounterXXX_16
274
(
275
input wire Clock, Reset,
276
input wire [15:0] Initial,
277
output reg [15:0] Q
278
);
279
 
280
 
281
  always @(posedge Clock )
282
    begin
283
      if (Reset)
284
        Q = Initial;
285
      else
286
        Q = Q + 1'b1;
287
      end
288
 
289
endmodule
290
*/
291
//-----------------------------------------------------------
292
module UpCounter_16E
293
(
294
input wire Clock,
295
input wire Reset,
296
input wire [15:0] Initial,
297
input wire Enable,
298
output wire [15:0] Q
299
);
300
        reg [15:0] Temp;
301
 
302
 
303
  always @(posedge Clock or posedge Reset)
304
  begin
305
      if (Reset)
306
         Temp = Initial;
307
      else
308
                        if (Enable)
309
                                Temp =  Temp + 1'b1;
310
  end
311
        assign Q = Temp;
312
 
313
endmodule
314
//-----------------------------------------------------------
315
module UpCounter_32
316
(
317
input wire Clock,
318
input wire Reset,
319
input wire [31:0] Initial,
320
input wire Enable,
321
output wire [31:0] Q
322
);
323
        reg [31:0] Temp;
324
 
325
 
326
  always @(posedge Clock or posedge Reset)
327
  begin
328
      if (Reset)
329
                begin
330
         Temp = Initial;
331
                end
332
      else
333
                begin
334
                        if (Enable)
335
                        begin
336
                                Temp =  Temp + 1'b1;
337
                        end
338
                end
339
  end
340
        assign Q = Temp;
341
 
342
endmodule
343
//-----------------------------------------------------------
344
module UpCounter_3
345
(
346
input wire Clock,
347
input wire Reset,
348
input wire [2:0] Initial,
349
input wire Enable,
350
output wire [2:0] Q
351
);
352
        reg [2:0] Temp;
353
 
354
 
355
  always @(posedge Clock or posedge Reset)
356
  begin
357
      if (Reset)
358
         Temp = Initial;
359
      else
360
                        if (Enable)
361
                                Temp =  Temp + 3'b1;
362
  end
363
        assign Q = Temp;
364
 
365
endmodule
366
 
367
 
368
module FFD32_POSEDGE
369
(
370
        input wire Clock,
371
        input wire[31:0] D,
372
        output reg[31:0] Q
373
);
374
 
375
        always @ (posedge Clock)
376
                Q <= D;
377
 
378
endmodule
379
 
380
//------------------------------------------------
381 70 diegovalve
/*
382 36 diegovalve
module FF_OPCODE_POSEDGE_SYNCRONOUS_RESET
383
        (
384
        input wire Clock,
385
        input wire Clear,
386
        input wire[`INSTRUCTION_OP_LENGTH-1:0] D,
387
        output reg[`INSTRUCTION_OP_LENGTH-1:0]  Q
388
        );
389
 
390
  always @(posedge Clock or posedge Clear)
391
    begin
392
           if (Clear)
393
        Q = `INSTRUCTION_OP_LENGTH'b0;
394
      else
395
        Q = D;
396
    end
397
endmodule
398
//------------------------------------------------
399 70 diegovalve
 
400 36 diegovalve
module FF32_POSEDGE_SYNCRONOUS_RESET
401
        (
402
        input wire Clock,
403
        input wire Clear,
404
        input wire[31:0] D,
405
        output reg[31:0]  Q
406
        );
407
 
408
  always @(posedge Clock or posedge Clear)
409
    begin
410
           if (Clear)
411
        Q = 32'b0;
412
      else
413
        Q = D;
414
    end
415
endmodule
416
//------------------------------------------------
417 63 diegovalve
 
418 36 diegovalve
module FF16_POSEDGE_SYNCRONOUS_RESET
419
        (
420
        input wire Clock,
421
        input wire Clear,
422
        input wire[15:0] D,
423
        output reg[15:0]  Q
424
        );
425
 
426
  always @(posedge Clock or posedge Clear)
427
    begin
428
           if (Clear)
429
        Q = 16'b0;
430
      else
431
        Q = D;
432
    end
433
endmodule
434 70 diegovalve
*/
435 36 diegovalve
//------------------------------------------------
436
module MUXFULLPARALELL_96bits_2SEL
437
 (
438
 input wire Sel,
439
 input wire [95:0]I1, I2,
440
 output reg [95:0] O1
441
 );
442
 
443
 
444
 
445
always @( * )
446
 
447
  begin
448
 
449
    case (Sel)
450
 
451
      1'b0: O1 = I1;
452
      1'b1: O1 = I2;
453
 
454
    endcase
455
 
456
  end
457
 
458
endmodule
459
//------------------------------------------------
460
 
461
module MUXFULLPARALELL_16bits_2SEL_X
462
 (
463
 input wire [1:0] Sel,
464
 input wire [15:0]I1, I2, I3,
465
 output reg [15:0] O1
466
 );
467
 
468
 
469
 
470
always @( * )
471
 
472
  begin
473
 
474
    case (Sel)
475
 
476
      2'b00: O1 = I1;
477
      2'b01: O1 = I2;
478
                2'b10: O1 = I3;
479
                default: O1 = 16'b0;
480
 
481
    endcase
482
 
483
  end
484
 
485
endmodule
486
//------------------------------------------------
487
module MUXFULLPARALELL_16bits_2SEL
488
 (
489
 input wire Sel,
490
 input wire [15:0]I1, I2,
491
 output reg [15:0] O1
492
 );
493
 
494
 
495
 
496
always @( * )
497
 
498
  begin
499
 
500
    case (Sel)
501
 
502
      1'b0: O1 = I1;
503
      1'b1: O1 = I2;
504
 
505
    endcase
506
 
507
  end
508
 
509
endmodule
510
 
511
 
512
//------------------------------------------------
513 63 diegovalve
/*
514 36 diegovalve
module MUXFULLPARALELL_1Bit_1SEL
515
 (
516
 input wire Sel,
517
 input wire I1, I2,
518
 output reg O1
519
 );
520
 
521
 
522
 
523
always @( * )
524
 
525
  begin
526
 
527
    case (Sel)
528
 
529
      1'b0: O1 = I1;
530
      1'b1: O1 = I2;
531
 
532
    endcase
533
 
534
  end
535
 
536
endmodule
537 63 diegovalve
*/
538 36 diegovalve
//--------------------------------------------------------------
539 63 diegovalve
/*
540 36 diegovalve
module FFD_OPCODE_POSEDGE
541
(
542
        input wire Clock,
543
        input wire[`INSTRUCTION_OP_LENGTH-1:0] D,
544
        output reg[`INSTRUCTION_OP_LENGTH-1:0] Q
545
);
546
 
547
        always @ (posedge Clock)
548
                Q <= D;
549
 
550
endmodule
551 63 diegovalve
*/
552 36 diegovalve
//--------------------------------------------------------------
553 63 diegovalve
/*
554 36 diegovalve
module FFD16_POSEDGE
555
(
556
        input wire Clock,
557
        input wire[15:0] D,
558
        output reg[15:0] Q
559
);
560
 
561
        always @ (posedge Clock)
562
                Q <= D;
563
 
564
endmodule
565 63 diegovalve
*/
566 36 diegovalve
//--------------------------------------------------------------
567
 
568
  module FFT1
569
  (
570
   input wire D,
571
   input wire Clock,
572
   input wire Reset ,
573
   output reg Q
574
 );
575
 
576
  always @ ( posedge Clock or posedge Reset )
577
  begin
578
 
579
        if (Reset)
580
        begin
581
    Q <= 1'b0;
582
   end
583
        else
584
        begin
585
                if (D)
586
                        Q <=  ! Q;
587
        end
588
 
589
  end//always
590
 
591
 endmodule
592
//--------------------------------------------------------------

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