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date Fri, 27 Oct 2017 22:46:09 +0900
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1 -- CXB2003.A
2 --
3 -- Grant of Unlimited Rights
4 --
5 -- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
6 -- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
7 -- unlimited rights in the software and documentation contained herein.
8 -- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
9 -- this public release, the Government intends to confer upon all
10 -- recipients unlimited rights equal to those held by the Government.
11 -- These rights include rights to use, duplicate, release or disclose the
12 -- released technical data and computer software in whole or in part, in
13 -- any manner and for any purpose whatsoever, and to have or permit others
14 -- to do so.
15 --
16 -- DISCLAIMER
17 --
18 -- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
19 -- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
20 -- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
21 -- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
22 -- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
23 -- PARTICULAR PURPOSE OF SAID MATERIAL.
24 --*
25 --
26 -- OBJECTIVE:
27 -- Check that subprograms Shift_Left, Shift_Right,
28 -- Shift_Right_Arithmetic, Rotate_Left, and Rotate_Right are available
29 -- and produce correct results for values of signed and modular
30 -- integer types of 32 bits.
31 --
32 -- TEST DESCRIPTION:
33 -- This test uses the shift and rotate functions of package Interfaces
34 -- with a modular type representative of 32 bits. The functions
35 -- are used as the right hand of assignment statements, as part of
36 -- conditional statements, and as arguments in other function calls.
37 --
38 -- APPLICABILITY CRITERIA:
39 -- This test is applicable to all implementations that support signed
40 -- and modular integer types of 32 bits.
41 --
42 --
43 -- CHANGE HISTORY:
44 -- 23 Aug 95 SAIC Initial prerelease version.
45 -- 07 May 96 SAIC Incorporated reviewer comments for ACVC 2.1.
46 -- 26 Oct 96 SAIC Removed all references to Big/Little endian.
47 --
48 --!
49
50 with Report;
51 with Interfaces;
52 with Ada.Exceptions;
53
54 procedure CXB2003 is
55 begin
56
57 Report.Test ("CXB2003",
58 "Check that subprograms Shift_Left, Shift_Right, " &
59 "Shift_Right_Arithmetic, Rotate_Left, and Rotate_Right " &
60 "are available and produce correct results");
61
62 Test_Block:
63 declare
64
65 use Interfaces;
66 use Ada.Exceptions;
67
68 TC_Amount : Natural := Natural'First;
69
70 -- Range of type Unsigned_32 is 0..(2**32)-1 (0..Modulus-1).
71 TC_Val_Unsigned_32,
72 TC_Result_Unsigned_32 : Unsigned_32 := Unsigned_32'First;
73
74 begin
75
76 -- Note: The shifting and rotating subprograms operate on a bit-by-bit
77 -- basis, using the binary representation of the value of the
78 -- operands to yield a binary representation for the result.
79
80
81 -- Function Shift_Left.
82
83 TC_Amount := 2;
84 TC_Val_Unsigned_32 := Unsigned_32'Last;
85 TC_Result_Unsigned_32 := Shift_Left(TC_Val_Unsigned_32, TC_Amount);
86
87 if TC_Result_Unsigned_32 /= Unsigned_32'Last - (2**0 + 2**1) then
88 Report.Failed("Incorrect result from Shift_Left - 1");
89 end if;
90
91 TC_Result_Unsigned_32 := Unsigned_32'Last - (2**0 + 2**1 + 2**2 +
92 2**3 + 2**4);
93 if Shift_Left(TC_Val_Unsigned_32, 5) /= TC_Result_Unsigned_32 or
94 Shift_Left(TC_Val_Unsigned_32, 0) /= Unsigned_32'Last
95 then
96 Report.Failed("Incorrect result from Shift_Left - 2");
97 end if;
98
99
100 -- Function Shift_Right.
101
102 TC_Amount := 3;
103 TC_Val_Unsigned_32 := Unsigned_32'Last;
104 TC_Result_Unsigned_32 := Shift_Right(Value => TC_Val_Unsigned_32,
105 Amount => TC_Amount);
106 if TC_Result_Unsigned_32 /=
107 Unsigned_32'Last - (2**31 + 2**30 + 2**29)
108 then
109 Report.Failed("Incorrect result from Shift_Right - 1");
110 end if;
111
112 if Shift_Right(TC_Val_Unsigned_32, 0) /= Unsigned_32'Last or
113 Shift_Right(TC_Val_Unsigned_32, 2) /= Unsigned_32'Last -
114 (2**31 + 2**30)
115 then
116 Report.Failed("Incorrect result from Shift_Right - 2");
117 end if;
118
119
120 -- Tests of Shift_Left and Shift_Right in combination.
121
122 TC_Val_Unsigned_32 := Unsigned_32'Last;
123
124 if Shift_Left(Shift_Right(TC_Val_Unsigned_32, 4), 4) /=
125 Unsigned_32'Last - (2**0 + 2**1 + 2**2 + 2**3) or
126 Shift_Left(Shift_Right(TC_Val_Unsigned_32, 3), 1) /=
127 Unsigned_32'Last - (2**31 + 2**30 + 2**0) or
128 Shift_Left(Shift_Right(TC_Val_Unsigned_32, 5), 3) /=
129 Unsigned_32'Last - (2**31 + 2**30 + 2**2 + 2**1 + 2**0) or
130 Shift_Right(Shift_Left(TC_Val_Unsigned_32, 2), 1) /=
131 Unsigned_32'Last - (2**31 + 2**0)
132 then
133 Report.Failed("Incorrect result from Shift_Left - " &
134 "Shift_Right functions used in combination");
135 end if;
136
137
138 -- Function Shift_Right_Arithmetic.
139
140 -- Case where the parameter Value is less than
141 -- one half of the modulus. Zero bits will be shifted in.
142
143 TC_Amount := 3;
144 TC_Val_Unsigned_32 := 2**15 + 2**10 + 2**1;
145 TC_Result_Unsigned_32 := Shift_Right_Arithmetic(TC_Val_Unsigned_32,
146 TC_Amount);
147 if TC_Result_Unsigned_32 /= (2**12 + 2**7) then
148 Report.Failed
149 ("Incorrect result from Shift_Right_Arithmetic - 1");
150 end if;
151
152 if Shift_Right_Arithmetic(TC_Val_Unsigned_32, 0) /=
153 TC_Val_Unsigned_32 or
154 Shift_Right_Arithmetic(TC_Val_Unsigned_32, 5) /=
155 (2**10 + 2**5)
156 then
157 Report.Failed
158 ("Incorrect result from Shift_Right_Arithmetic - 2");
159 end if;
160
161 -- Case where the parameter Value is greater than or equal to
162 -- one half of the modulus. One bits will be shifted in.
163
164 TC_Amount := 1;
165 TC_Val_Unsigned_32 := 2**31; -- One half of modulus
166 TC_Result_Unsigned_32 := Shift_Right_Arithmetic(TC_Val_Unsigned_32,
167 TC_Amount);
168 if TC_Result_Unsigned_32 /= (2**31 + 2**30) then
169 Report.Failed
170 ("Incorrect result from Shift_Right_Arithmetic - 3");
171 end if;
172
173 TC_Amount := 1;
174 TC_Val_Unsigned_32 := (2**31 + 2**1);
175 TC_Result_Unsigned_32 := Shift_Right_Arithmetic(TC_Val_Unsigned_32,
176 TC_Amount);
177 if TC_Result_Unsigned_32 /= (2**31 + 2**30 + 2**0) then
178 Report.Failed
179 ("Incorrect result from Shift_Right_Arithmetic - 4");
180 end if;
181
182 if Shift_Right_Arithmetic(TC_Val_Unsigned_32, 0) /=
183 TC_Val_Unsigned_32 or
184 Shift_Right_Arithmetic(TC_Val_Unsigned_32, 3) /=
185 (2**31 + 2**30 + 2**29 + 2**28)
186 then
187 Report.Failed
188 ("Incorrect result from Shift_Right_Arithmetic - 5");
189 end if;
190
191
192 -- Function Rotate_Left.
193
194 TC_Amount := 3;
195 TC_Val_Unsigned_32 := Unsigned_32'Last;
196 TC_Result_Unsigned_32 := Rotate_Left(Value => TC_Val_Unsigned_32,
197 Amount => TC_Amount);
198 if TC_Result_Unsigned_32 /= Unsigned_32'Last then
199 Report.Failed("Incorrect result from Rotate_Left - 1");
200 end if;
201
202 TC_Val_Unsigned_32 := 2**31 + 2**30;
203 if Rotate_Left(TC_Val_Unsigned_32, 1) /= (2**31 + 2**0) or
204 Rotate_Left(TC_Val_Unsigned_32, 5) /= (2**4 + 2**3) or
205 Rotate_Left(TC_Val_Unsigned_32, 32) /= TC_Val_Unsigned_32
206 then
207 Report.Failed("Incorrect result from Rotate_Left - 2");
208 end if;
209
210
211 -- Function Rotate_Right.
212
213 TC_Amount := 2;
214 TC_Val_Unsigned_32 := (2**1 + 2**0);
215 TC_Result_Unsigned_32 := Rotate_Right(Value => TC_Val_Unsigned_32,
216 Amount => TC_Amount);
217 if TC_Result_Unsigned_32 /= (2**31 + 2**30) then
218 Report.Failed("Incorrect result from Rotate_Right - 1");
219 end if;
220
221 if Rotate_Right(TC_Val_Unsigned_32, 3) /= (2**30 + 2**29) or
222 Rotate_Right(TC_Val_Unsigned_32, 6) /= (2**27 + 2**26) or
223 Rotate_Right(TC_Val_Unsigned_32, 32) /= (2**1 + 2**0)
224 then
225 Report.Failed("Incorrect result from Rotate_Right - 2");
226 end if;
227
228
229 -- Tests of Rotate_Left and Rotate_Right in combination.
230
231 TC_Val_Unsigned_32 := (2**31 + 2**15 + 2**3);
232
233 if Rotate_Left(Rotate_Right(TC_Val_Unsigned_32, 4), 3) /=
234 (2**30 + 2**14 + 2**2) or
235 Rotate_Left(Rotate_Right(TC_Val_Unsigned_32, 1), 3) /=
236 (2**17 + 2**5 + 2**1) or
237 Rotate_Right(Rotate_Left(TC_Val_Unsigned_32, 3), 7) /=
238 (2**31 + 2**27 + 2**11) or
239 Rotate_Right(Rotate_Left(TC_Val_Unsigned_32, 1), 32) /=
240 (2**16 + 2**4 + 2**0)
241 then
242 Report.Failed("Incorrect result from Rotate_Left - " &
243 "Rotate_Right functions used in combination");
244 end if;
245
246
247 exception
248 when The_Error : others =>
249 Report.Failed ("The following exception was raised in the " &
250 "Test_Block: " & Exception_Name(The_Error));
251 end Test_Block;
252
253 Report.Result;
254
255 end CXB2003;