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| author | Benjamin Barenblat <bbaren@google.com> | 2024-04-18 10:36:51 -0700 |
|---|---|---|
| committer | Copybara-Service <copybara-worker@google.com> | 2024-04-18 10:37:56 -0700 |
| commit | 192e959b16809f751d565b53a949b21129d904fb (patch) | |
| tree | 6305393afc947dc466f88cdd886bd9139b3f8b21 /absl/numeric/int128_no_intrinsic.inc | |
| parent | 9a61b00dde4031f17ed4fa4bdc0e0e9ad8859846 (diff) | |
| download | abseil-192e959b16809f751d565b53a949b21129d904fb.tar.gz abseil-192e959b16809f751d565b53a949b21129d904fb.tar.bz2 abseil-192e959b16809f751d565b53a949b21129d904fb.zip | |
Add `operator<=>` support to `absl::int128` and `absl::uint128`
PiperOrigin-RevId: 626080616
Change-Id: If434be2371c1e28f9fd0133f411596bdc38bd222
Diffstat (limited to 'absl/numeric/int128_no_intrinsic.inc')
| -rw-r--r-- | absl/numeric/int128_no_intrinsic.inc | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/absl/numeric/int128_no_intrinsic.inc b/absl/numeric/int128_no_intrinsic.inc index 6f5d8377..195b7452 100644 --- a/absl/numeric/int128_no_intrinsic.inc +++ b/absl/numeric/int128_no_intrinsic.inc @@ -186,6 +186,24 @@ constexpr bool operator<=(int128 lhs, int128 rhs) { return !(lhs > rhs); } constexpr bool operator>=(int128 lhs, int128 rhs) { return !(lhs < rhs); } +#ifdef __cpp_impl_three_way_comparison +constexpr absl::strong_ordering operator<=>(int128 lhs, int128 rhs) { + if (int64_t lhs_high = Int128High64(lhs), rhs_high = Int128High64(rhs); + lhs_high < rhs_high) { + return absl::strong_ordering::less; + } else if (lhs_high > rhs_high) { + return absl::strong_ordering::greater; + } else if (uint64_t lhs_low = Uint128Low64(lhs), rhs_low = Uint128Low64(rhs); + lhs_low < rhs_low) { + return absl::strong_ordering::less; + } else if (lhs_low > rhs_low) { + return absl::strong_ordering::greater; + } else { + return absl::strong_ordering::equal; + } +} +#endif + // Unary operators. constexpr int128 operator-(int128 v) { |