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
|
/*
* Copyright (c) 2017, 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
#include "precompiled.hpp"
#include "utilities/align.hpp"
#include "utilities/formatBuffer.hpp"
#include "utilities/globalDefinitions.hpp"
#include "unittest.hpp"
#include <limits>
// A few arbitrarily chosen values to test the align functions on.
static constexpr uint64_t values[] = {1, 3, 10, 345, 1023, 1024, 1025, 23909034, INT_MAX, uint64_t(-1) / 2, uint64_t(-1) / 2 + 100, uint64_t(-1)};
template <typename T>
static constexpr T max_alignment() {
T max = std::numeric_limits<T>::max();
return max ^ (max >> 1);
}
#define log(...) SCOPED_TRACE(err_msg(__VA_ARGS__).buffer())
struct StaticTestAlignmentsResult {
uint64_t _value;
uint64_t _alignment;
int _status; // 0: success, > 0 indicates which failure case
constexpr StaticTestAlignmentsResult(uint64_t value, uint64_t alignment, int status) :
_value(value), _alignment(alignment), _status(status) {}
};
// Structure copied from test_alignments runtime test (below).
template<typename T, typename A>
static constexpr StaticTestAlignmentsResult
static_test_alignments_aux(A alignment) {
using Result = StaticTestAlignmentsResult;
for ( ; alignment > 0; alignment >>= 1) {
for (size_t i = 0; i < ARRAY_SIZE(values); ++i) {
// Test align up
uint64_t up = align_up(values[i], alignment);
if (0 < up && up < uint64_t(std::numeric_limits<T>::max())) {
T value = T(values[i]);
if (align_up(uint64_t(value), alignment) != up) {
return Result(values[i], alignment, 1);
} else if (align_up(value, alignment) < value) {
return Result(values[i], alignment, 2);
}
}
// Test align down
uint64_t down = align_down(values[i], alignment);
if (down <= uint64_t(std::numeric_limits<T>::max())) {
T value = T(values[i]);
if (uint64_t(align_down(value, alignment)) != down) {
return Result(values[i], alignment, 3);
} else if (align_down(value, alignment) > value) {
return Result(values[i], alignment, 4);
}
}
// Test is aligned
bool is = is_aligned(values[i], alignment);
if (values[i] <= uint64_t(std::numeric_limits<T>::max())) {
T value = T(values[i]);
if (is_aligned(value, alignment) != is) {
return Result(values[i], alignment, 5);
}
}
}
}
return Result(T(), A(), 0);
}
template<typename T, typename A>
static void static_test_alignments() {
constexpr StaticTestAlignmentsResult result
= static_test_alignments_aux<T>(max_alignment<A>());
EXPECT_EQ(0, result._status)
<< "value = " << result._value
<< ", alignment = " << result._alignment
<< ", status = " << result._status;
}
template <typename T, typename A>
static void test_alignments() {
log("### Test: %c" SIZE_FORMAT " " UINT64_FORMAT " : %c" SIZE_FORMAT " " UINT64_FORMAT " ###\n",
std::numeric_limits<T>::is_signed ? 's' : 'u', sizeof(T), (uint64_t)std::numeric_limits<T>::max(),
std::numeric_limits<A>::is_signed ? 's' : 'u', sizeof(A), (uint64_t)std::numeric_limits<A>::max());
// Test all possible alignment values that fit in type A.
for (A alignment = max_alignment<A>(); alignment > 0; alignment >>= 1) {
log("=== Alignment: " UINT64_FORMAT " ===\n", (uint64_t)alignment);
for (size_t i = 0; i < ARRAY_SIZE(values); i++) {
log("--- Value: " UINT64_FORMAT "\n", values[i]);
// Test align up
const uint64_t up = align_up(values[i], alignment);
if (0 < up && up <= (uint64_t)std::numeric_limits<T>::max()) {
log("Testing align_up: alignment: " UINT64_FORMAT_X " value: " UINT64_FORMAT_X " expected: " UINT64_FORMAT_X "\n", (uint64_t)alignment, values[i], up);
T value = T(values[i]);
// Check against uint64_t version
ASSERT_EQ(align_up((uint64_t)value, alignment), up);
// Sanity check
ASSERT_GE(align_up(value, alignment), value);
}
// Test align down
const uint64_t down = align_down(values[i], alignment);
if (down <= (uint64_t)std::numeric_limits<T>::max()) {
log("Testing align_down: alignment: " UINT64_FORMAT_X " value: " UINT64_FORMAT_X " expected: " UINT64_FORMAT_X "\n", (uint64_t)alignment, values[i], down);
T value = T(values[i]);
// Check against uint64_t version
ASSERT_EQ((uint64_t)align_down(value, alignment), down);
// Sanity check
ASSERT_LE(align_down(value, alignment), value);
}
// Test is aligned
const bool is = is_aligned(values[i], alignment);
if (values[i] <= (uint64_t)std::numeric_limits<T>::max()) {
log("Testing is_aligned: alignment: " UINT64_FORMAT_X " value: " UINT64_FORMAT_X " expected: %s\n", (uint64_t)alignment, values[i], is ? "true" : "false");
T value = T(values[i]);
// Check against uint64_t version
ASSERT_EQ(is_aligned(value, alignment), is);
}
}
}
static_test_alignments<T, A>();
}
TEST(Align, alignments) {
// Test the alignment functions with different type combinations.
test_alignments<int64_t, uint8_t>();
test_alignments<int64_t, uint16_t>();
test_alignments<int64_t, uint32_t>();
test_alignments<int64_t, int8_t>();
test_alignments<int64_t, int16_t>();
test_alignments<int64_t, int32_t>();
test_alignments<int64_t, int64_t>();
test_alignments<uint32_t, uint8_t>();
test_alignments<uint32_t, uint16_t>();
test_alignments<uint32_t, uint32_t>();
test_alignments<uint32_t, int8_t>();
test_alignments<uint32_t, int16_t>();
test_alignments<uint32_t, int32_t>();
test_alignments<int32_t, uint8_t>();
test_alignments<int32_t, uint16_t>();
test_alignments<int32_t, int8_t>();
test_alignments<int32_t, int16_t>();
test_alignments<int32_t, int32_t>();
test_alignments<uint16_t, uint8_t>();
test_alignments<uint16_t, uint16_t>();
test_alignments<uint16_t, int8_t>();
test_alignments<uint16_t, int16_t>();
test_alignments<int16_t, uint8_t>();
test_alignments<int16_t, int8_t>();
test_alignments<int16_t, int16_t>();
test_alignments<uint8_t, int8_t>();
test_alignments<uint8_t, uint8_t>();
test_alignments<int8_t, int8_t>();
}
|
