diff options
Diffstat (limited to 'third_party/abseil-cpp/absl/numeric/int128_test.cc')
-rw-r--r-- | third_party/abseil-cpp/absl/numeric/int128_test.cc | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/third_party/abseil-cpp/absl/numeric/int128_test.cc b/third_party/abseil-cpp/absl/numeric/int128_test.cc index bc86c714ac..dd9425d77a 100644 --- a/third_party/abseil-cpp/absl/numeric/int128_test.cc +++ b/third_party/abseil-cpp/absl/numeric/int128_test.cc @@ -226,6 +226,11 @@ TEST(Uint128, AllTests) { EXPECT_EQ(test >>= 1, one); EXPECT_EQ(test <<= 1, two); + EXPECT_EQ(big, +big); + EXPECT_EQ(two, +two); + EXPECT_EQ(absl::Uint128Max(), +absl::Uint128Max()); + EXPECT_EQ(zero, +zero); + EXPECT_EQ(big, -(-big)); EXPECT_EQ(two, -((-one) - 1)); EXPECT_EQ(absl::Uint128Max(), -one); @@ -234,6 +239,24 @@ TEST(Uint128, AllTests) { EXPECT_EQ(absl::Uint128Max(), absl::kuint128max); } +TEST(Int128, RightShiftOfNegativeNumbers) { + absl::int128 minus_six = -6; + absl::int128 minus_three = -3; + absl::int128 minus_two = -2; + absl::int128 minus_one = -1; + if ((-6 >> 1) == -3) { + // Right shift is arithmetic (sign propagates) + EXPECT_EQ(minus_six >> 1, minus_three); + EXPECT_EQ(minus_six >> 2, minus_two); + EXPECT_EQ(minus_six >> 65, minus_one); + } else { + // Right shift is logical (zeros shifted in at MSB) + EXPECT_EQ(minus_six >> 1, absl::int128(absl::uint128(minus_six) >> 1)); + EXPECT_EQ(minus_six >> 2, absl::int128(absl::uint128(minus_six) >> 2)); + EXPECT_EQ(minus_six >> 65, absl::int128(absl::uint128(minus_six) >> 65)); + } +} + TEST(Uint128, ConversionTests) { EXPECT_TRUE(absl::MakeUint128(1, 0)); @@ -769,6 +792,19 @@ TEST(Int128, ComparisonTest) { } } +TEST(Int128, UnaryPlusTest) { + int64_t values64[] = {0, 1, 12345, 0x4000000000000000, + std::numeric_limits<int64_t>::max()}; + for (int64_t value : values64) { + SCOPED_TRACE(::testing::Message() << "value = " << value); + + EXPECT_EQ(absl::int128(value), +absl::int128(value)); + EXPECT_EQ(absl::int128(-value), +absl::int128(-value)); + EXPECT_EQ(absl::MakeInt128(value, 0), +absl::MakeInt128(value, 0)); + EXPECT_EQ(absl::MakeInt128(-value, 0), +absl::MakeInt128(-value, 0)); + } +} + TEST(Int128, UnaryNegationTest) { int64_t values64[] = {0, 1, 12345, 0x4000000000000000, std::numeric_limits<int64_t>::max()}; |