/* * 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.
*/
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);
} elseif (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);
} elseif (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> staticvoid static_test_alignments() {
constexpr StaticTestAlignmentsResult result
= static_test_alignments_aux<T>(max_alignment<A>());
// 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 constbool 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.
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