198 lines
7.1 KiB
C++
198 lines
7.1 KiB
C++
/*
|
|
* 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>();
|
|
}
|