diff options
Diffstat (limited to 'absl/numeric/int128_test.cc')
| -rw-r--r-- | absl/numeric/int128_test.cc | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/absl/numeric/int128_test.cc b/absl/numeric/int128_test.cc index 216ec50c54ec..5e1b5ec352b0 100644 --- a/absl/numeric/int128_test.cc +++ b/absl/numeric/int128_test.cc @@ -271,6 +271,20 @@ TEST(Uint128, ConversionTests) { EXPECT_EQ(static_cast<absl::uint128>(round_to_zero), 0); EXPECT_EQ(static_cast<absl::uint128>(round_to_five), 5); EXPECT_EQ(static_cast<absl::uint128>(round_to_nine), 9); + + absl::uint128 highest_precision_in_long_double = + ~absl::uint128{} >> (128 - std::numeric_limits<long double>::digits); + EXPECT_EQ(highest_precision_in_long_double, + static_cast<absl::uint128>( + static_cast<long double>(highest_precision_in_long_double))); + // Apply a mask just to make sure all the bits are the right place. + const absl::uint128 arbitrary_mask = + absl::MakeUint128(0xa29f622677ded751, 0xf8ca66add076f468); + EXPECT_EQ(highest_precision_in_long_double & arbitrary_mask, + static_cast<absl::uint128>(static_cast<long double>( + highest_precision_in_long_double & arbitrary_mask))); + + EXPECT_EQ(static_cast<absl::uint128>(-0.1L), 0); } TEST(Uint128, OperatorAssignReturnRef) { |