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
|
-- CD30002.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 the implementation supports Alignments for subtypes and
-- objects specified as factors and multiples of the number of storage
-- elements per word, unless those values cannot be loaded and stored.
-- Check that the largest alignment returned by default is supported.
--
-- Check that the implementation supports Alignments supported by the
-- target linker for stand-alone library-level objects of statically
-- constrained subtypes.
--
-- TEST DESCRIPTION:
-- This test defines several types and objects, specifying various
-- alignments for them (as factors and multiples of the number of
-- storage elements per word). It then checks the alignments by
-- declaring some objects, and checking that the integer values of
-- their addresses is mod the specified alignment. This will not
-- prevent false passes where the lucky compiler gets it right by
-- chance, but will catch compilers that specifically do not obey
-- the alignment clauses.
--
-- APPLICABILITY CRITERIA:
-- All implementations must attempt to compile this test.
--
-- For implementations validating against Systems Programming Annex (C):
-- this test must execute and report PASSED.
--
-- For implementations not validating against Annex C:
-- this test may report compile time errors at one or more points
-- indicated by "-- ANX-C RQMT", in which case it may be graded as inapplicable.
-- Otherwise, the test must execute and report PASSED.
--
--
-- CHANGE HISTORY:
-- 22 JUL 95 SAIC Initial version
-- 09 MAY 96 SAIC Strengthened for 2.1
-- 26 FEB 97 PWB.CTA Allowed for unexpected word sizes
-- 16 FEB 98 EDS Modified documentation.
-- 26 SEP 98 RLB Fixed value on line 130 so check and dec. match.
-- 30 OCT 98 RLB Split Multiple_Alignment and revised the
-- calculation to work on all targets.
-- 18 JAN 99 RLB Repaired again to work on targets where word size
-- equals storage unit.
--!
----------------------------------------------------------------- CD30002_0
with Impdef;
with System.Storage_Elements;
package CD30002_0 is
S_Units_per_Word : constant := System.Word_Size/System.Storage_Unit;
-- Must be 1 or greater.
Multiple_Type_Alignment : constant :=
Integer'Min ( Impdef.Max_Default_Alignment,
2 * S_Units_per_Word );
-- Calculate a reasonable alignment, but not larger than the
-- implementation is required to support.
Multiple_Object_Alignment : constant :=
Integer'Min ( Impdef.Max_Linker_Alignment,
2 * S_Units_per_Word );
-- Calculate a reasonable object alignment, but not larger than
-- the implementation is required to support.
Small_Alignment : constant :=
Integer'Max ( S_Units_per_Word / 2, 1);
-- Calculate a reasonable small alignment, but not less than 1.
-- (If S_Units_per_Word = 1, 1/2 => 0 which causes problems
-- verifying alignment.)
subtype Storage_Element is System.Storage_Elements.Storage_Element;
type Some_Stuff is array(1..S_Units_Per_Word) of Storage_Element;
for Some_Stuff'Alignment
use Impdef.Max_Default_Alignment; -- ANX-C RQMT.
Library_Level_Object : Some_Stuff;
for Library_Level_Object'Alignment
use Impdef.Max_Linker_Alignment; -- ANX-C RQMT.
type Quarter is mod 4; -- two bits
for Quarter'Alignment use Small_Alignment; -- ANX-C RQMT.
type Half is mod 16; -- nibble
for Half'Alignment use Multiple_Type_Alignment; -- ANX-C RQMT.
type O_Some_Stuff is array(1..S_Units_Per_Word) of Storage_Element;
type O_Quarter is mod 4; -- two bits
type O_Half is mod 16; -- nibble
end CD30002_0;
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- there is no package body CD30002_0
------------------------------------------------------------------- CD30002
with Report;
with Impdef;
with CD30002_0;
with System.Storage_Elements;
procedure CD30002 is
My_Stuff : CD30002_0.Some_Stuff;
-- Impdef.Max_Default_Alignment
My_Quarter : CD30002_0.Quarter;
-- CD30002_0.S_Units_per_Word / 2
My_Half : CD30002_0.Half;
-- CD30002_0.S_Units_per_Word * 2
Stuff_Object : CD30002_0.O_Some_Stuff;
for Stuff_Object'Alignment
use Impdef.Max_Default_Alignment; -- ANX-C RQMT.
Quarter_Object : CD30002_0.O_Quarter;
for Quarter_Object'Alignment
use CD30002_0.Small_Alignment; -- ANX-C RQMT.
Half_Object : CD30002_0.O_Half;
for Half_Object'Alignment
use CD30002_0.Multiple_Object_Alignment; -- ANX-C RQMT.
subtype IntAdd is System.Storage_Elements.Integer_Address;
use type System.Storage_Elements.Integer_Address;
function A2I(Value: System.Address) return IntAdd renames
System.Storage_Elements.To_Integer;
NAC : constant String := " not aligned correctly";
begin -- Main test procedure.
Report.Test ("CD30002", "Check that the implementation supports " &
"Alignments for subtypes and objects specified " &
"as factors and multiples of the number of " &
"storage elements per word, unless those values " &
"cannot be loaded and stored. Check that the " &
"largest alignment returned by default is " &
"supported. Check that the implementation " &
"supports Alignments supported by the target " &
"linker for stand-alone library-level objects " &
"of statically constrained subtypes" );
if A2I(CD30002_0.Library_Level_Object'Address)
mod Impdef.Max_Linker_Alignment /= 0 then
Report.Failed("Library_Level_Object" & NAC);
end if;
if A2I(My_Stuff'Address) mod Impdef.Max_Default_Alignment /= 0 then
Report.Failed("Max alignment subtype" & NAC);
end if;
if A2I(My_Quarter'Address) mod (CD30002_0.Small_Alignment) /= 0 then
Report.Failed("Factor of words subtype" & NAC);
end if;
if A2I(My_Half'Address) mod (CD30002_0.Multiple_Type_Alignment) /= 0 then
Report.Failed("Multiple of words subtype" & NAC);
end if;
if A2I(Stuff_Object'Address) mod Impdef.Max_Default_Alignment /= 0 then
Report.Failed("Stuff alignment object" & NAC);
end if;
if A2I(Quarter_Object'Address)
mod (CD30002_0.Small_Alignment) /= 0 then
Report.Failed("Factor of words object" & NAC);
end if;
if A2I(Half_Object'Address) mod (CD30002_0.Multiple_Object_Alignment) /= 0 then
Report.Failed("Multiple of words object" & NAC);
end if;
Report.Result;
end CD30002;
|
