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-exception
6 //
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
18 using namespace __orc_rt;
19
TEST(Endian,ByteSwap_32)20 TEST(Endian, ByteSwap_32) {
21 EXPECT_EQ(0x44332211u, ByteSwap_32(0x11223344));
22 EXPECT_EQ(0xDDCCBBAAu, ByteSwap_32(0xAABBCCDD));
23 }
24
TEST(Endian,ByteSwap_64)25 TEST(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 truncated
31 // except for 64. We could avoid this, but there's really no point.
TEST(Endian,getSwappedBytes_UnsignedRoundTrip)32 TEST(Endian, getSwappedBytes_UnsignedRoundTrip) {
33 // The point of the bit twiddling of magic is to test with and without bits
34 // 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
TEST(Endian,getSwappedBytes_SignedRoundTrip)56 TEST(Endian, getSwappedBytes_SignedRoundTrip) {
57 // The point of the bit twiddling of magic is to test with and without bits
58 // 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
TEST(Endian,getSwappedBytes_uint8_t)94 TEST(Endian, getSwappedBytes_uint8_t) {
95 EXPECT_EQ(uint8_t(0x11), getSwappedBytes(uint8_t(0x11)));
96 }
97
TEST(Endian,getSwappedBytes_uint16_t)98 TEST(Endian, getSwappedBytes_uint16_t) {
99 EXPECT_EQ(uint16_t(0x1122), getSwappedBytes(uint16_t(0x2211)));
100 }
101
TEST(Endian,getSwappedBytes_uint32_t)102 TEST(Endian, getSwappedBytes_uint32_t) {
103 EXPECT_EQ(uint32_t(0x11223344), getSwappedBytes(uint32_t(0x44332211)));
104 }
105
TEST(Endian,getSwappedBytes_uint64_t)106 TEST(Endian, getSwappedBytes_uint64_t) {
107 EXPECT_EQ(uint64_t(0x1122334455667788ULL),
108 getSwappedBytes(uint64_t(0x8877665544332211ULL)));
109 }
110
TEST(Endian,getSwappedBytes_int8_t)111 TEST(Endian, getSwappedBytes_int8_t) {
112 EXPECT_EQ(int8_t(0x11), getSwappedBytes(int8_t(0x11)));
113 }
114
TEST(Endian,getSwappedBytes_int16_t)115 TEST(Endian, getSwappedBytes_int16_t) {
116 EXPECT_EQ(int16_t(0x1122), getSwappedBytes(int16_t(0x2211)));
117 }
118
TEST(Endian,getSwappedBytes_int32_t)119 TEST(Endian, getSwappedBytes_int32_t) {
120 EXPECT_EQ(int32_t(0x11223344), getSwappedBytes(int32_t(0x44332211)));
121 }
122
TEST(Endian,getSwappedBytes_int64_t)123 TEST(Endian, getSwappedBytes_int64_t) {
124 EXPECT_EQ(int64_t(0x1122334455667788LL),
125 getSwappedBytes(int64_t(0x8877665544332211LL)));
126 }
127
TEST(Endian,swapByteOrder_uint8_t)128 TEST(Endian, swapByteOrder_uint8_t) {
129 uint8_t value = 0x11;
130 swapByteOrder(value);
131 EXPECT_EQ(uint8_t(0x11), value);
132 }
133
TEST(Endian,swapByteOrder_uint16_t)134 TEST(Endian, swapByteOrder_uint16_t) {
135 uint16_t value = 0x2211;
136 swapByteOrder(value);
137 EXPECT_EQ(uint16_t(0x1122), value);
138 }
139
TEST(Endian,swapByteOrder_uint32_t)140 TEST(Endian, swapByteOrder_uint32_t) {
141 uint32_t value = 0x44332211;
142 swapByteOrder(value);
143 EXPECT_EQ(uint32_t(0x11223344), value);
144 }
145
TEST(Endian,swapByteOrder_uint64_t)146 TEST(Endian, swapByteOrder_uint64_t) {
147 uint64_t value = 0x8877665544332211ULL;
148 swapByteOrder(value);
149 EXPECT_EQ(uint64_t(0x1122334455667788ULL), value);
150 }
151
TEST(Endian,swapByteOrder_int8_t)152 TEST(Endian, swapByteOrder_int8_t) {
153 int8_t value = 0x11;
154 swapByteOrder(value);
155 EXPECT_EQ(int8_t(0x11), value);
156 }
157
TEST(Endian,swapByteOrder_int16_t)158 TEST(Endian, swapByteOrder_int16_t) {
159 int16_t value = 0x2211;
160 swapByteOrder(value);
161 EXPECT_EQ(int16_t(0x1122), value);
162 }
163
TEST(Endian,swapByteOrder_int32_t)164 TEST(Endian, swapByteOrder_int32_t) {
165 int32_t value = 0x44332211;
166 swapByteOrder(value);
167 EXPECT_EQ(int32_t(0x11223344), value);
168 }
169
TEST(Endian,swapByteOrder_int64_t)170 TEST(Endian, swapByteOrder_int64_t) {
171 int64_t value = 0x8877665544332211LL;
172 swapByteOrder(value);
173 EXPECT_EQ(int64_t(0x1122334455667788LL), value);
174 }
175