175 lines · cpp
1//===- endian_test.cpp ------------------------- swap byte order test -----===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file is a part of the ORC runtime.10//11// Adapted from the llvm/unittests/Support/SwapByteOrderTest.cpp LLVM unit test.12//13//===----------------------------------------------------------------------===//14 15#include "endianness.h"16#include "gtest/gtest.h"17 18using namespace orc_rt;19 20TEST(Endian, ByteSwap_32) {21 EXPECT_EQ(0x44332211u, ByteSwap_32(0x11223344));22 EXPECT_EQ(0xDDCCBBAAu, ByteSwap_32(0xAABBCCDD));23}24 25TEST(Endian, ByteSwap_64) {26 EXPECT_EQ(0x8877665544332211ULL, ByteSwap_64(0x1122334455667788LL));27 EXPECT_EQ(0x1100FFEEDDCCBBAAULL, ByteSwap_64(0xAABBCCDDEEFF0011LL));28}29 30// In these first two tests all of the original_uintx values are truncated31// except for 64. We could avoid this, but there's really no point.32TEST(Endian, getSwappedBytes_UnsignedRoundTrip) {33 // The point of the bit twiddling of magic is to test with and without bits34 // in every byte.35 uint64_t value = 1;36 for (std::size_t i = 0; i <= sizeof(value); ++i) {37 uint8_t original_uint8 = static_cast<uint8_t>(value);38 EXPECT_EQ(original_uint8, getSwappedBytes(getSwappedBytes(original_uint8)));39 40 uint16_t original_uint16 = static_cast<uint16_t>(value);41 EXPECT_EQ(original_uint16,42 getSwappedBytes(getSwappedBytes(original_uint16)));43 44 uint32_t original_uint32 = static_cast<uint32_t>(value);45 EXPECT_EQ(original_uint32,46 getSwappedBytes(getSwappedBytes(original_uint32)));47 48 uint64_t original_uint64 = static_cast<uint64_t>(value);49 EXPECT_EQ(original_uint64,50 getSwappedBytes(getSwappedBytes(original_uint64)));51 52 value = (value << 8) | 0x55; // binary 0101 0101.53 }54}55 56TEST(Endian, getSwappedBytes_SignedRoundTrip) {57 // The point of the bit twiddling of magic is to test with and without bits58 // in every byte.59 uint64_t value = 1;60 for (std::size_t i = 0; i <= sizeof(value); ++i) {61 int8_t original_int8 = static_cast<int8_t>(value);62 EXPECT_EQ(original_int8, getSwappedBytes(getSwappedBytes(original_int8)));63 64 int16_t original_int16 = static_cast<int16_t>(value);65 EXPECT_EQ(original_int16, getSwappedBytes(getSwappedBytes(original_int16)));66 67 int32_t original_int32 = static_cast<int32_t>(value);68 EXPECT_EQ(original_int32, getSwappedBytes(getSwappedBytes(original_int32)));69 70 int64_t original_int64 = static_cast<int64_t>(value);71 EXPECT_EQ(original_int64, getSwappedBytes(getSwappedBytes(original_int64)));72 73 // Test other sign.74 value *= -1;75 76 original_int8 = static_cast<int8_t>(value);77 EXPECT_EQ(original_int8, getSwappedBytes(getSwappedBytes(original_int8)));78 79 original_int16 = static_cast<int16_t>(value);80 EXPECT_EQ(original_int16, getSwappedBytes(getSwappedBytes(original_int16)));81 82 original_int32 = static_cast<int32_t>(value);83 EXPECT_EQ(original_int32, getSwappedBytes(getSwappedBytes(original_int32)));84 85 original_int64 = static_cast<int64_t>(value);86 EXPECT_EQ(original_int64, getSwappedBytes(getSwappedBytes(original_int64)));87 88 // Return to normal sign and twiddle.89 value *= -1;90 value = (value << 8) | 0x55; // binary 0101 0101.91 }92}93 94TEST(Endian, getSwappedBytes_uint8_t) {95 EXPECT_EQ(uint8_t(0x11), getSwappedBytes(uint8_t(0x11)));96}97 98TEST(Endian, getSwappedBytes_uint16_t) {99 EXPECT_EQ(uint16_t(0x1122), getSwappedBytes(uint16_t(0x2211)));100}101 102TEST(Endian, getSwappedBytes_uint32_t) {103 EXPECT_EQ(uint32_t(0x11223344), getSwappedBytes(uint32_t(0x44332211)));104}105 106TEST(Endian, getSwappedBytes_uint64_t) {107 EXPECT_EQ(uint64_t(0x1122334455667788ULL),108 getSwappedBytes(uint64_t(0x8877665544332211ULL)));109}110 111TEST(Endian, getSwappedBytes_int8_t) {112 EXPECT_EQ(int8_t(0x11), getSwappedBytes(int8_t(0x11)));113}114 115TEST(Endian, getSwappedBytes_int16_t) {116 EXPECT_EQ(int16_t(0x1122), getSwappedBytes(int16_t(0x2211)));117}118 119TEST(Endian, getSwappedBytes_int32_t) {120 EXPECT_EQ(int32_t(0x11223344), getSwappedBytes(int32_t(0x44332211)));121}122 123TEST(Endian, getSwappedBytes_int64_t) {124 EXPECT_EQ(int64_t(0x1122334455667788LL),125 getSwappedBytes(int64_t(0x8877665544332211LL)));126}127 128TEST(Endian, swapByteOrder_uint8_t) {129 uint8_t value = 0x11;130 swapByteOrder(value);131 EXPECT_EQ(uint8_t(0x11), value);132}133 134TEST(Endian, swapByteOrder_uint16_t) {135 uint16_t value = 0x2211;136 swapByteOrder(value);137 EXPECT_EQ(uint16_t(0x1122), value);138}139 140TEST(Endian, swapByteOrder_uint32_t) {141 uint32_t value = 0x44332211;142 swapByteOrder(value);143 EXPECT_EQ(uint32_t(0x11223344), value);144}145 146TEST(Endian, swapByteOrder_uint64_t) {147 uint64_t value = 0x8877665544332211ULL;148 swapByteOrder(value);149 EXPECT_EQ(uint64_t(0x1122334455667788ULL), value);150}151 152TEST(Endian, swapByteOrder_int8_t) {153 int8_t value = 0x11;154 swapByteOrder(value);155 EXPECT_EQ(int8_t(0x11), value);156}157 158TEST(Endian, swapByteOrder_int16_t) {159 int16_t value = 0x2211;160 swapByteOrder(value);161 EXPECT_EQ(int16_t(0x1122), value);162}163 164TEST(Endian, swapByteOrder_int32_t) {165 int32_t value = 0x44332211;166 swapByteOrder(value);167 EXPECT_EQ(int32_t(0x11223344), value);168}169 170TEST(Endian, swapByteOrder_int64_t) {171 int64_t value = 0x8877665544332211LL;172 swapByteOrder(value);173 EXPECT_EQ(int64_t(0x1122334455667788LL), value);174}175