| //===- unittests/Support/SwapByteOrderTest.cpp - swap byte order test -----===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Support/SwapByteOrder.h" |
| #include "gtest/gtest.h" |
| #include <cstdlib> |
| #include <ctime> |
| using namespace llvm; |
| |
| #undef max |
| |
| namespace { |
| |
| // In these first two tests all of the original_uintx values are truncated |
| // except for 64. We could avoid this, but there's really no point. |
| |
| TEST(getSwappedBytes, UnsignedRoundTrip) { |
| // The point of the bit twiddling of magic is to test with and without bits |
| // in every byte. |
| uint64_t value = 1; |
| for (std::size_t i = 0; i <= sizeof(value); ++i) { |
| uint8_t original_uint8 = static_cast<uint8_t>(value); |
| EXPECT_EQ(original_uint8, |
| sys::getSwappedBytes(sys::getSwappedBytes(original_uint8))); |
| |
| uint16_t original_uint16 = static_cast<uint16_t>(value); |
| EXPECT_EQ(original_uint16, |
| sys::getSwappedBytes(sys::getSwappedBytes(original_uint16))); |
| |
| uint32_t original_uint32 = static_cast<uint32_t>(value); |
| EXPECT_EQ(original_uint32, |
| sys::getSwappedBytes(sys::getSwappedBytes(original_uint32))); |
| |
| uint64_t original_uint64 = static_cast<uint64_t>(value); |
| EXPECT_EQ(original_uint64, |
| sys::getSwappedBytes(sys::getSwappedBytes(original_uint64))); |
| |
| value = (value << 8) | 0x55; // binary 0101 0101. |
| } |
| } |
| |
| TEST(getSwappedBytes, SignedRoundTrip) { |
| // The point of the bit twiddling of magic is to test with and without bits |
| // in every byte. |
| uint64_t value = 1; |
| for (std::size_t i = 0; i <= sizeof(value); ++i) { |
| int8_t original_int8 = static_cast<int8_t>(value); |
| EXPECT_EQ(original_int8, |
| sys::getSwappedBytes(sys::getSwappedBytes(original_int8))); |
| |
| int16_t original_int16 = static_cast<int16_t>(value); |
| EXPECT_EQ(original_int16, |
| sys::getSwappedBytes(sys::getSwappedBytes(original_int16))); |
| |
| int32_t original_int32 = static_cast<int32_t>(value); |
| EXPECT_EQ(original_int32, |
| sys::getSwappedBytes(sys::getSwappedBytes(original_int32))); |
| |
| int64_t original_int64 = static_cast<int64_t>(value); |
| EXPECT_EQ(original_int64, |
| sys::getSwappedBytes(sys::getSwappedBytes(original_int64))); |
| |
| // Test other sign. |
| value *= -1; |
| |
| original_int8 = static_cast<int8_t>(value); |
| EXPECT_EQ(original_int8, |
| sys::getSwappedBytes(sys::getSwappedBytes(original_int8))); |
| |
| original_int16 = static_cast<int16_t>(value); |
| EXPECT_EQ(original_int16, |
| sys::getSwappedBytes(sys::getSwappedBytes(original_int16))); |
| |
| original_int32 = static_cast<int32_t>(value); |
| EXPECT_EQ(original_int32, |
| sys::getSwappedBytes(sys::getSwappedBytes(original_int32))); |
| |
| original_int64 = static_cast<int64_t>(value); |
| EXPECT_EQ(original_int64, |
| sys::getSwappedBytes(sys::getSwappedBytes(original_int64))); |
| |
| // Return to normal sign and twiddle. |
| value *= -1; |
| value = (value << 8) | 0x55; // binary 0101 0101. |
| } |
| } |
| |
| TEST(getSwappedBytes, uint8_t) { |
| EXPECT_EQ(uint8_t(0x11), sys::getSwappedBytes(uint8_t(0x11))); |
| } |
| |
| TEST(getSwappedBytes, uint16_t) { |
| EXPECT_EQ(uint16_t(0x1122), sys::getSwappedBytes(uint16_t(0x2211))); |
| } |
| |
| TEST(getSwappedBytes, uint32_t) { |
| EXPECT_EQ(uint32_t(0x11223344), sys::getSwappedBytes(uint32_t(0x44332211))); |
| } |
| |
| TEST(getSwappedBytes, uint64_t) { |
| EXPECT_EQ(uint64_t(0x1122334455667788ULL), |
| sys::getSwappedBytes(uint64_t(0x8877665544332211ULL))); |
| } |
| |
| TEST(getSwappedBytes, int8_t) { |
| EXPECT_EQ(int8_t(0x11), sys::getSwappedBytes(int8_t(0x11))); |
| } |
| |
| TEST(getSwappedBytes, int16_t) { |
| EXPECT_EQ(int16_t(0x1122), sys::getSwappedBytes(int16_t(0x2211))); |
| } |
| |
| TEST(getSwappedBytes, int32_t) { |
| EXPECT_EQ(int32_t(0x11223344), sys::getSwappedBytes(int32_t(0x44332211))); |
| } |
| |
| TEST(getSwappedBytes, int64_t) { |
| EXPECT_EQ(int64_t(0x1122334455667788LL), |
| sys::getSwappedBytes(int64_t(0x8877665544332211LL))); |
| } |
| |
| TEST(getSwappedBytes, float) { |
| EXPECT_EQ(1.79366203433576585078237386661e-43f, sys::getSwappedBytes(-0.0f)); |
| // 0x11223344 |
| EXPECT_EQ(7.1653228759765625e2f, sys::getSwappedBytes(1.2795344e-28f)); |
| } |
| |
| TEST(getSwappedBytes, double) { |
| EXPECT_EQ(6.32404026676795576546008054871e-322, sys::getSwappedBytes(-0.0)); |
| // 0x1122334455667788 |
| EXPECT_EQ(-7.08687663657301358331704585496e-268, |
| sys::getSwappedBytes(3.84141202447173065923064450234e-226)); |
| } |
| |
| TEST(swapByteOrder, uint8_t) { |
| uint8_t value = 0x11; |
| sys::swapByteOrder(value); |
| EXPECT_EQ(uint8_t(0x11), value); |
| } |
| |
| TEST(swapByteOrder, uint16_t) { |
| uint16_t value = 0x2211; |
| sys::swapByteOrder(value); |
| EXPECT_EQ(uint16_t(0x1122), value); |
| } |
| |
| TEST(swapByteOrder, uint32_t) { |
| uint32_t value = 0x44332211; |
| sys::swapByteOrder(value); |
| EXPECT_EQ(uint32_t(0x11223344), value); |
| } |
| |
| TEST(swapByteOrder, uint64_t) { |
| uint64_t value = 0x8877665544332211ULL; |
| sys::swapByteOrder(value); |
| EXPECT_EQ(uint64_t(0x1122334455667788ULL), value); |
| } |
| |
| TEST(swapByteOrder, int8_t) { |
| int8_t value = 0x11; |
| sys::swapByteOrder(value); |
| EXPECT_EQ(int8_t(0x11), value); |
| } |
| |
| TEST(swapByteOrder, int16_t) { |
| int16_t value = 0x2211; |
| sys::swapByteOrder(value); |
| EXPECT_EQ(int16_t(0x1122), value); |
| } |
| |
| TEST(swapByteOrder, int32_t) { |
| int32_t value = 0x44332211; |
| sys::swapByteOrder(value); |
| EXPECT_EQ(int32_t(0x11223344), value); |
| } |
| |
| TEST(swapByteOrder, int64_t) { |
| int64_t value = 0x8877665544332211LL; |
| sys::swapByteOrder(value); |
| EXPECT_EQ(int64_t(0x1122334455667788LL), value); |
| } |
| |
| TEST(swapByteOrder, float) { |
| float value = 7.1653228759765625e2f; // 0x44332211 |
| sys::swapByteOrder(value); |
| EXPECT_EQ(1.2795344e-28f, value); |
| } |
| |
| TEST(swapByteOrder, double) { |
| double value = -7.08687663657301358331704585496e-268; // 0x8877665544332211 |
| sys::swapByteOrder(value); |
| EXPECT_EQ(3.84141202447173065923064450234e-226, value); |
| } |
| |
| } |