| /* |
| * Copyright (c) 2017, 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 uint64_t values[] = {1, 3, 10, 345, 1023, 1024, 1025, 23909034, INT_MAX, uint64_t(-1) / 2, uint64_t(-1) / 2 + 100, -1 }; |
| |
| template <typename T> |
| static T max_alignment() { |
| T max = std::numeric_limits<T>::max(); |
| return max ^ (max >> 1); |
| } |
| |
| #define log(...) SCOPED_TRACE(err_msg(__VA_ARGS__).buffer()) |
| |
| 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], (uint64_t)alignment); |
| if (0 < up && up <= (uint64_t)std::numeric_limits<T>::max()) { |
| log("Testing align_up: alignment: 0x" UINT64_FORMAT_X " value: 0x" UINT64_FORMAT_X " expected: 0x" 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); |
| // Check inline function vs macro |
| ASSERT_EQ(align_up(value, alignment), align_up_(value, alignment)); |
| // Sanity check |
| ASSERT_GE(align_up(value, alignment), value); |
| } |
| |
| // Test align down |
| const uint64_t down = align_down_(values[i], (uint64_t)alignment); |
| if (down <= (uint64_t)std::numeric_limits<T>::max()) { |
| log("Testing align_down: alignment: 0x" UINT64_FORMAT_X " value: 0x" UINT64_FORMAT_X " expected: 0x" 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); |
| // Check inline function vs macro |
| ASSERT_EQ(align_down(value, alignment), align_down_(value, alignment)); |
| // Sanity check |
| ASSERT_LE(align_down(value, alignment), value); |
| } |
| |
| // Test is aligned |
| const bool is = is_aligned_(values[i], (uint64_t)alignment); |
| if (values[i] <= (uint64_t)std::numeric_limits<T>::max()) { |
| log("Testing is_aligned: alignment: 0x" UINT64_FORMAT_X " value: 0x" 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); |
| // Check inline function vs macro |
| ASSERT_EQ(is_aligned(value, alignment), is_aligned_(value, alignment)); |
| } |
| } |
| } |
| } |
| |
| TEST(Align, functions_and_macros) { |
| // 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>(); |
| } |