1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
|
-- CXB2001.A
--
-- Grant of Unlimited Rights
--
-- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
-- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
-- unlimited rights in the software and documentation contained herein.
-- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
-- this public release, the Government intends to confer upon all
-- recipients unlimited rights equal to those held by the Government.
-- These rights include rights to use, duplicate, release or disclose the
-- released technical data and computer software in whole or in part, in
-- any manner and for any purpose whatsoever, and to have or permit others
-- to do so.
--
-- DISCLAIMER
--
-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
-- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
-- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
-- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
-- PARTICULAR PURPOSE OF SAID MATERIAL.
--*
--
-- OBJECTIVE:
-- Check that subprograms Shift_Left, Shift_Right,
-- Shift_Right_Arithmetic, Rotate_Left, and Rotate_Right are available
-- and produce correct results for values of signed and modular
-- integer types of 8 bits.
--
-- TEST DESCRIPTION:
-- This test uses the shift and rotate functions of package Interfaces
-- with a modular type representative of 8 bits. The functions
-- are used as the right hand of assignment statements, as part of
-- conditional statements, and as arguments in other function calls.
--
-- A check is performed in the test to determine whether the bit
-- ordering method used by the machine/implementation is high-order
-- first ("Big Endian") or low-order first ("Little Endian"). The
-- specific subtests use this information to evaluate the results of
-- each of the functions under test.
--
-- Note: In the string associated with each Report.Failed statement, the
-- acronym BE refers to Big Endian, LE refers to Little Endian.
--
-- APPLICABILITY CRITERIA:
-- This test is applicable to all implementations that support signed
-- and modular integer types of 8 bits.
--
--
-- CHANGE HISTORY:
-- 21 Aug 95 SAIC Initial prerelease version.
-- 07 May 96 SAIC Incorporated reviewer comments for ACVC 2.1.
--
--!
with Report;
with Interfaces;
with Ada.Exceptions;
procedure CXB2001 is
begin
Report.Test ("CXB2001",
"Check that subprograms Shift_Left, Shift_Right, " &
"Shift_Right_Arithmetic, Rotate_Left, and Rotate_Right " &
"produce correct results for values of signed and " &
"modular integer types of 8 bits");
Test_Block:
declare
use Ada.Exceptions;
use Interfaces;
TC_Amount : Natural := Natural'First;
Big_Endian : Boolean := False;
-- Range of type Unsigned_8 is 0..255 (0..Modulus-1).
TC_Val_Unsigned_8,
TC_Result_Unsigned_8 : Unsigned_8 := Unsigned_8'First;
begin
-- Determine whether the machine uses high-order first or low-order
-- first bit ordering.
-- On a high-order first machine, bit zero of a storage element is
-- the most significant bit (interpreting the sequence of bits that
-- represent a component as an unsigned integer value).
-- On a low-order first machine, bit zero is the least significant.
-- In this check, a right shift of one place on a Big Endian machine
-- will yield a result of one, while on a Little Endian machine the
-- result would be four.
TC_Val_Unsigned_8 := 2;
Big_Endian := (Shift_Right(TC_Val_Unsigned_8, 1) = 1);
-- Note: The shifting and rotating subprograms operate on a bit-by-bit
-- basis, using the binary representation of the value of the
-- operands to yield a binary representation for the result.
-- Function Shift_Left.
if Big_Endian then -- High-order first bit ordering.
TC_Amount := 1;
TC_Val_Unsigned_8 := Unsigned_8'Last; -- 255.
TC_Result_Unsigned_8 := Shift_Left(Value => TC_Val_Unsigned_8,
Amount => TC_Amount);
if TC_Result_Unsigned_8 /= 254 then
Report.Failed("Incorrect result from BE Shift_Left - 1");
end if;
if Shift_Left(TC_Val_Unsigned_8, 2) /= 252 or
Shift_Left(TC_Val_Unsigned_8, 3) /= 248 or
Shift_Left(TC_Val_Unsigned_8, 5) /= 224 or
Shift_Left(TC_Val_Unsigned_8, 8) /= 0 or
Shift_Left(TC_Val_Unsigned_8, 9) /= 0 or
Shift_Left(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8
then
Report.Failed("Incorrect result from BE Shift_Left - 2");
end if;
TC_Val_Unsigned_8 := 1;
if Shift_Left(TC_Val_Unsigned_8, 1) /= 2 or
Shift_Left(TC_Val_Unsigned_8, Amount => 3) /= 8
then
Report.Failed("Incorrect result from BE Shift_Left - 3");
end if;
TC_Val_Unsigned_8 := 7;
if Shift_Left(TC_Val_Unsigned_8, Amount => 4) /= 112 or
Shift_Left(Shift_Left(TC_Val_Unsigned_8, 7), 1) /= 0
then
Report.Failed("Incorrect result from BE Shift_Left - 4");
end if;
else -- Low-order first bit ordering.
TC_Amount := 1;
TC_Val_Unsigned_8 := Unsigned_8'Last; -- 255.
TC_Result_Unsigned_8 := Shift_Left(TC_Val_Unsigned_8, TC_Amount);
if TC_Result_Unsigned_8 /= 127 then
Report.Failed("Incorrect result from LE Shift_Left - 1");
end if;
if Shift_Left(TC_Val_Unsigned_8, 2) /= 63 or
Shift_Left(TC_Val_Unsigned_8, 3) /= 31 or
Shift_Left(TC_Val_Unsigned_8, 5) /= 7 or
Shift_Left(TC_Val_Unsigned_8, 8) /= 0 or
Shift_Left(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8
then
Report.Failed("Incorrect result from LE Shift_Left - 2");
end if;
TC_Val_Unsigned_8 := 1;
if Shift_Left(TC_Val_Unsigned_8, 1) /= 0 or
Shift_Left(TC_Val_Unsigned_8, 7) /= 0
then
Report.Failed("Incorrect result from LE Shift_Left - 3");
end if;
TC_Val_Unsigned_8 := 129;
if Shift_Left(TC_Val_Unsigned_8, 4) /= 8 or
Shift_Left(Shift_Left(TC_Val_Unsigned_8, 7), 1) /= 0
then
Report.Failed("Incorrect result from LE Shift_Left - 4");
end if;
end if;
-- Function Shift_Right.
if Big_Endian then -- High-order first bit ordering.
TC_Amount := 1;
TC_Val_Unsigned_8 := Unsigned_8'Last; -- 255.
TC_Result_Unsigned_8 := Shift_Right(TC_Val_Unsigned_8, TC_Amount);
if TC_Result_Unsigned_8 /= 127 then
Report.Failed("Incorrect result from BE Shift_Right - 1");
end if;
if Shift_Right(TC_Val_Unsigned_8, 2) /= 63 or
Shift_Right(TC_Val_Unsigned_8, 3) /= 31 or
Shift_Right(TC_Val_Unsigned_8, 5) /= 7 or
Shift_Right(TC_Val_Unsigned_8, 8) /= 0 or
Shift_Right(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8
then
Report.Failed("Incorrect result from BE Shift_Right - 2");
end if;
TC_Val_Unsigned_8 := 1;
if Shift_Right(TC_Val_Unsigned_8, 1) /= 0 or
Shift_Right(TC_Val_Unsigned_8, 7) /= 0
then
Report.Failed("Incorrect result from BE Shift_Right - 3");
end if;
TC_Val_Unsigned_8 := 129;
if Shift_Right(TC_Val_Unsigned_8, 4) /= 8 or
Shift_Right(Shift_Right(TC_Val_Unsigned_8, 7), 1) /= 0
then
Report.Failed("Incorrect result from BE Shift_Right - 4");
end if;
else -- Low-order first bit ordering.
TC_Amount := 1;
TC_Val_Unsigned_8 := Unsigned_8'Last; -- 255.
TC_Result_Unsigned_8 := Shift_Right(Value => TC_Val_Unsigned_8,
Amount => TC_Amount);
if TC_Result_Unsigned_8 /= 254 then
Report.Failed("Incorrect result from LE Shift_Right - 1");
end if;
if Shift_Right(TC_Val_Unsigned_8, 2) /= 252 or
Shift_Right(TC_Val_Unsigned_8, 3) /= 248 or
Shift_Right(TC_Val_Unsigned_8, 5) /= 224 or
Shift_Right(TC_Val_Unsigned_8, 8) /= 0 or
Shift_Right(TC_Val_Unsigned_8, 9) /= 0 or
Shift_Right(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8
then
Report.Failed("Incorrect result from LE Shift_Right - 2");
end if;
TC_Val_Unsigned_8 := 1;
if Shift_Right(TC_Val_Unsigned_8, 1) /= 2 or
Shift_Right(TC_Val_Unsigned_8, Amount => 3) /= 8
then
Report.Failed("Incorrect result from LE Shift_Right - 3");
end if;
TC_Val_Unsigned_8 := 7;
if Shift_Right(TC_Val_Unsigned_8, Amount => 4) /= 112 or
Shift_Right(Shift_Right(TC_Val_Unsigned_8, 7), 1) /= 0
then
Report.Failed("Incorrect result from LE Shift_Right - 4");
end if;
end if;
-- Tests of Shift_Left and Shift_Right in combination.
if Big_Endian then -- High-order first bit ordering.
TC_Val_Unsigned_8 := 32;
if Shift_Left(Shift_Right(TC_Val_Unsigned_8, 2), 2) /=
TC_Val_Unsigned_8 or
Shift_Left(Shift_Right(TC_Val_Unsigned_8, 1), 3) /= 128 or
Shift_Right(Shift_Left(TC_Val_Unsigned_8, 2), 6) /= 2 or
Shift_Right(Shift_Left(TC_Val_Unsigned_8, 2), 8) /= 0
then
Report.Failed("Incorrect result from BE Shift_Left - " &
"Shift_Right functions used in combination");
end if;
else -- Low-order first bit ordering.
TC_Val_Unsigned_8 := 32;
if Shift_Left(Shift_Right(TC_Val_Unsigned_8, 2), 2) /=
TC_Val_Unsigned_8 or
Shift_Left(Shift_Right(TC_Val_Unsigned_8, 1), 3) /= 8 or
Shift_Right(Shift_Left(TC_Val_Unsigned_8, 2), 3) /= 64 or
Shift_Right(Shift_Left(TC_Val_Unsigned_8, 2), 4) /= 128
then
Report.Failed("Incorrect result from LE Shift_Left - " &
"Shift_Right functions used in combination");
end if;
end if;
-- Function Shift_Right_Arithmetic.
if Big_Endian then -- High-order first bit ordering.
-- Case where the parameter Value is less than
-- one half of the modulus. Zero bits will be shifted in.
-- Modulus of type Unsigned_8 is 256; half of the modulus is 128.
TC_Amount := 1;
TC_Val_Unsigned_8 := 127; -- Less than one half of modulus.
TC_Result_Unsigned_8 := Shift_Right_Arithmetic(TC_Val_Unsigned_8,
TC_Amount);
if TC_Result_Unsigned_8 /= 63 then
Report.Failed
("Incorrect result from BE Shift_Right_Arithmetic - 1");
end if;
if Shift_Right_Arithmetic(TC_Val_Unsigned_8, 2) /= 31 or
Shift_Right_Arithmetic(TC_Val_Unsigned_8, 3) /= 15 or
Shift_Right_Arithmetic(TC_Val_Unsigned_8, 5) /= 3 or
Shift_Right_Arithmetic(TC_Val_Unsigned_8, 8) /= 0 or
Shift_Right_Arithmetic(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8
then
Report.Failed
("Incorrect result from BE Shift_Right_Arithmetic - 2");
end if;
TC_Val_Unsigned_8 := 1;
if Shift_Right_Arithmetic(TC_Val_Unsigned_8, Amount => 1) /= 0 or
Shift_Right_Arithmetic(TC_Val_Unsigned_8, 3) /= 0
then
Report.Failed
("Incorrect result from BE Shift_Right_Arithmetic - 3");
end if;
-- Case where the parameter Value is greater than or equal to
-- one half of the modulus. One bits will be shifted in.
TC_Amount := 1;
TC_Val_Unsigned_8 := 128; -- One half of modulus.
TC_Result_Unsigned_8 := Shift_Right_Arithmetic(TC_Val_Unsigned_8,
Amount => TC_Amount);
if TC_Result_Unsigned_8 /= 192 then
Report.Failed
("Incorrect result from BE Shift_Right_Arithmetic - 4");
end if;
TC_Amount := 1;
TC_Val_Unsigned_8 := 129; -- Greater than one half of modulus.
TC_Result_Unsigned_8 := Shift_Right_Arithmetic(TC_Val_Unsigned_8,
Amount => TC_Amount);
if TC_Result_Unsigned_8 /= 192 then
Report.Failed
("Incorrect result from BE Shift_Right_Arithmetic - 5");
end if;
if Shift_Right_Arithmetic(TC_Val_Unsigned_8, 2) /= 224 or
Shift_Right_Arithmetic(TC_Val_Unsigned_8, 3) /= 240 or
Shift_Right_Arithmetic(TC_Val_Unsigned_8, 5) /= 252 or
Shift_Right_Arithmetic(TC_Val_Unsigned_8, 7) /= Unsigned_8'Last or
Shift_Right_Arithmetic(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8
then
Report.Failed
("Incorrect result from BE Shift_Right_Arithmetic - 6");
end if;
TC_Val_Unsigned_8 := Unsigned_8'Last;
if Shift_Right_Arithmetic(TC_Val_Unsigned_8, 1) /=
Unsigned_8'Last
then
Report.Failed
("Incorrect result from BE Shift_Right_Arithmetic - 7");
end if;
else -- Low-order first bit ordering
-- Case where the parameter Value is less than
-- one half of the modulus. Zero bits will be shifted in.
TC_Amount := 1;
TC_Val_Unsigned_8 := 127; -- Less than one half of modulus.
TC_Result_Unsigned_8 := Shift_Right_Arithmetic(TC_Val_Unsigned_8,
TC_Amount);
if TC_Result_Unsigned_8 /= 254 then
Report.Failed
("Incorrect result from LE Shift_Right_Arithmetic - 1");
end if;
TC_Val_Unsigned_8 := 2;
if Shift_Right_Arithmetic(TC_Val_Unsigned_8, 2) /= 8 or
Shift_Right_Arithmetic(TC_Val_Unsigned_8, 3) /= 16 or
Shift_Right_Arithmetic(TC_Val_Unsigned_8, 5) /= 64 or
Shift_Right_Arithmetic(TC_Val_Unsigned_8, 8) /= 0 or
Shift_Right_Arithmetic(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8
then
Report.Failed
("Incorrect result from LE Shift_Right_Arithmetic - 2");
end if;
TC_Val_Unsigned_8 := 64;
if Shift_Right_Arithmetic(TC_Val_Unsigned_8, Amount => 1) /= 128 or
Shift_Right_Arithmetic(TC_Val_Unsigned_8, 3) /= 0
then
Report.Failed
("Incorrect result from LE Shift_Right_Arithmetic - 3");
end if;
-- Case where the parameter Value is greater than or equal to
-- one half of the modulus. One bits will be shifted in.
TC_Amount := 1;
TC_Val_Unsigned_8 := 128; -- One half of modulus.
TC_Result_Unsigned_8 := Shift_Right_Arithmetic(TC_Val_Unsigned_8,
Amount => TC_Amount);
if TC_Result_Unsigned_8 /= 3 then
Report.Failed
("Incorrect result from LE Shift_Right_Arithmetic - 4");
end if;
TC_Amount := 1;
TC_Val_Unsigned_8 := 129; -- Greater than one half of modulus.
TC_Result_Unsigned_8 := Shift_Right_Arithmetic(TC_Val_Unsigned_8,
Amount => TC_Amount);
if TC_Result_Unsigned_8 /= 3 then
Report.Failed
("Incorrect result from LE Shift_Right_Arithmetic - 5");
end if;
TC_Val_Unsigned_8 := 135; -- Greater than one half of modulus.
if Shift_Right_Arithmetic(TC_Val_Unsigned_8, 2) /= 31 or
Shift_Right_Arithmetic(TC_Val_Unsigned_8, 3) /= 63 or
Shift_Right_Arithmetic(TC_Val_Unsigned_8, 5) /= Unsigned_8'Last or
Shift_Right_Arithmetic(TC_Val_Unsigned_8, 7) /= Unsigned_8'Last or
Shift_Right_Arithmetic(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8
then
Report.Failed
("Incorrect result from LE Shift_Right_Arithmetic - 6");
end if;
TC_Val_Unsigned_8 := Unsigned_8'Last;
if Shift_Right_Arithmetic(TC_Val_Unsigned_8, 1) /=
Unsigned_8'Last
then
Report.Failed
("Incorrect result from LE Shift_Right_Arithmetic - 7");
end if;
end if;
-- Function Rotate_Left.
if Big_Endian then -- High-order first bit ordering.
TC_Amount := 1;
TC_Val_Unsigned_8 := 129;
TC_Result_Unsigned_8 := Rotate_Left(Value => TC_Val_Unsigned_8,
Amount => TC_Amount);
if TC_Result_Unsigned_8 /= 3 then
Report.Failed("Incorrect result from BE Rotate_Left - 1");
end if;
if Rotate_Left(TC_Val_Unsigned_8, 2) /= 6 or
Rotate_Left(TC_Val_Unsigned_8, 3) /= 12 or
Rotate_Left(TC_Val_Unsigned_8, 5) /= 48 or
Rotate_Left(TC_Val_Unsigned_8, 8) /= 129 or
Rotate_Left(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8
then
Report.Failed("Incorrect result from BE Rotate_Left - 2");
end if;
TC_Val_Unsigned_8 := 1;
if Rotate_Left(Value => TC_Val_Unsigned_8, Amount => 1) /= 2 or
Rotate_Left(TC_Val_Unsigned_8, Amount => 3) /= 8
then
Report.Failed("Incorrect result from BE Rotate_Left - 3");
end if;
TC_Val_Unsigned_8 := 82;
if Rotate_Left(TC_Val_Unsigned_8, Amount => 4) /= 37 or
Rotate_Left(Rotate_Left(TC_Val_Unsigned_8, 7), 1) /= 82
then
Report.Failed("Incorrect result from BE Rotate_Left - 4");
end if;
else -- Low-order first bit ordering.
TC_Amount := 1;
TC_Val_Unsigned_8 := 1;
TC_Result_Unsigned_8 := Rotate_Left(TC_Val_Unsigned_8, TC_Amount);
if TC_Result_Unsigned_8 /= 128 then
Report.Failed("Incorrect result from LE Rotate_Left - 1");
end if;
TC_Val_Unsigned_8 := 15;
if Rotate_Left(TC_Val_Unsigned_8, 2) /= 195 or
Rotate_Left(TC_Val_Unsigned_8, 3) /= 225 or
Rotate_Left(TC_Val_Unsigned_8, 5) /= 120 or
Rotate_Left(TC_Val_Unsigned_8, 8) /= TC_Val_Unsigned_8 or
Rotate_Left(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8
then
Report.Failed("Incorrect result from LE Rotate_Left - 2");
end if;
TC_Val_Unsigned_8 := Unsigned_8'Last;
if Rotate_Left(TC_Val_Unsigned_8, 1) /= Unsigned_8'Last then
Report.Failed("Incorrect result from LE Rotate_Left - 3");
end if;
TC_Val_Unsigned_8 := 12;
if Rotate_Left(TC_Val_Unsigned_8, 1) /= 6 or
Rotate_Left(TC_Val_Unsigned_8, 3) /= 129
then
Report.Failed("Incorrect result from LE Rotate_Left - 4");
end if;
TC_Val_Unsigned_8 := 129;
if Rotate_Left(TC_Val_Unsigned_8, 4) /= 24 or
Rotate_Left(Rotate_Left(TC_Val_Unsigned_8, 7), 1) /= 129
then
Report.Failed("Incorrect result from LE Rotate_Left - 5");
end if;
end if;
-- Function Rotate_Right.
if Big_Endian then -- High-order first bit ordering.
TC_Amount := 1;
TC_Val_Unsigned_8 := 1;
TC_Result_Unsigned_8 := Rotate_Right(TC_Val_Unsigned_8, TC_Amount);
if TC_Result_Unsigned_8 /= 128 then
Report.Failed("Incorrect result from BE Rotate_Right - 1");
end if;
TC_Val_Unsigned_8 := 15;
if Rotate_Right(TC_Val_Unsigned_8, 2) /= 195 or
Rotate_Right(TC_Val_Unsigned_8, 3) /= 225 or
Rotate_Right(TC_Val_Unsigned_8, 5) /= 120 or
Rotate_Right(TC_Val_Unsigned_8, 8) /= TC_Val_Unsigned_8 or
Rotate_Right(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8
then
Report.Failed("Incorrect result from BE Rotate_Right - 2");
end if;
TC_Val_Unsigned_8 := Unsigned_8'Last;
if Rotate_Right(TC_Val_Unsigned_8, 1) /= Unsigned_8'Last then
Report.Failed("Incorrect result from BE Rotate_Right - 3");
end if;
TC_Val_Unsigned_8 := 12;
if Rotate_Right(TC_Val_Unsigned_8, 1) /= 6 or
Rotate_Right(TC_Val_Unsigned_8, 3) /= 129
then
Report.Failed("Incorrect result from BE Rotate_Right - 4");
end if;
TC_Val_Unsigned_8 := 129;
if Rotate_Right(TC_Val_Unsigned_8, 4) /= 24 or
Rotate_Right(Rotate_Right(TC_Val_Unsigned_8, 7), 1) /= 129
then
Report.Failed("Incorrect result from BE Rotate_Right - 5");
end if;
else -- Low-order first bit ordering.
TC_Amount := 1;
TC_Val_Unsigned_8 := 129;
TC_Result_Unsigned_8 := Rotate_Right(Value => TC_Val_Unsigned_8,
Amount => TC_Amount);
if TC_Result_Unsigned_8 /= 3 then
Report.Failed("Incorrect result from LE Rotate_Right - 1");
end if;
if Rotate_Right(TC_Val_Unsigned_8, 2) /= 6 or
Rotate_Right(TC_Val_Unsigned_8, 3) /= 12 or
Rotate_Right(TC_Val_Unsigned_8, 5) /= 48 or
Rotate_Right(TC_Val_Unsigned_8, 8) /= 129 or
Rotate_Right(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8
then
Report.Failed("Incorrect result from LE Rotate_Right - 2");
end if;
TC_Val_Unsigned_8 := 1;
if Rotate_Right(Value => TC_Val_Unsigned_8, Amount => 1) /= 2 or
Rotate_Right(TC_Val_Unsigned_8, Amount => 3) /= 8
then
Report.Failed("Incorrect result from LE Rotate_Right - 3");
end if;
TC_Val_Unsigned_8 := 82;
if Rotate_Right(TC_Val_Unsigned_8, Amount => 4) /= 37 or
Rotate_Right(Rotate_Right(TC_Val_Unsigned_8, 7), 1) /= 82
then
Report.Failed("Incorrect result from LE Rotate_Right - 4");
end if;
end if;
-- Tests of Rotate_Left and Rotate_Right in combination.
if Big_Endian then -- High-order first bit ordering.
TC_Val_Unsigned_8 := 17;
if Rotate_Left(Rotate_Right(TC_Val_Unsigned_8, 2), 2) /=
TC_Val_Unsigned_8 or
Rotate_Left(Rotate_Right(TC_Val_Unsigned_8, 1), 3) /= 68 or
Rotate_Right(Rotate_Left(TC_Val_Unsigned_8, 3), 7) /= 17 or
Rotate_Right(Rotate_Left(TC_Val_Unsigned_8, 2), 8) /= 68
then
Report.Failed("Incorrect result from BE Rotate_Left - " &
"Rotate_Right functions used in combination");
end if;
else -- Low-order first bit ordering.
TC_Val_Unsigned_8 := 4;
if Rotate_Left(Rotate_Right(TC_Val_Unsigned_8, 2), 2) /=
TC_Val_Unsigned_8 or
Rotate_Left(Rotate_Right(TC_Val_Unsigned_8, 1), 3) /= 1 or
Rotate_Right(Rotate_Left(TC_Val_Unsigned_8, 3), 7) /= 64 or
Rotate_Right(Rotate_Left(TC_Val_Unsigned_8, 2), 8) /= 1
then
Report.Failed("Incorrect result from LE Rotate_Left - " &
"Rotate_Right functions used in combination");
end if;
end if;
exception
when The_Error : others =>
Report.Failed ("The following exception was raised in the " &
"Test_Block: " & Exception_Name(The_Error));
end Test_Block;
Report.Result;
end CXB2001;
|
