diff options
Diffstat (limited to 'absl/numeric')
| -rw-r--r-- | absl/numeric/int128.h | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/absl/numeric/int128.h b/absl/numeric/int128.h index f42a4aa3..a204ac4d 100644 --- a/absl/numeric/int128.h +++ b/absl/numeric/int128.h @@ -460,13 +460,10 @@ inline bool operator>=(uint128 lhs, uint128 rhs) { // Unary operators. inline uint128 operator-(uint128 val) { - const uint64_t hi_flip = ~Uint128High64(val); - const uint64_t lo_flip = ~Uint128Low64(val); - const uint64_t lo_add = lo_flip + 1; - if (lo_add < lo_flip) { - return MakeUint128(hi_flip + 1, lo_add); - } - return MakeUint128(hi_flip, lo_add); + uint64_t hi = ~Uint128High64(val); + uint64_t lo = ~Uint128Low64(val) + 1; + if (lo == 0) ++hi; // carry + return MakeUint128(hi, lo); } inline bool operator!(uint128 val) { |