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Changes imported from Abseil "staging" branch:

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- f679f7de2957ac4dca0a862d04f1165d2f503525 Merge GitHub PR #78: Fix typo in thread_identity.h by Derek Mauro <dmauro@google.com>
  - 369cbefc9ebb8503e3c25b1516c856dab3bed7ac Minor refactor of operator-(uint128). by Alex Strelnikov <strel@google.com>
  - fba0f8c33b051d90936ad0fcaa4bea83f554bf8d Merge GitHub PR #75: Fix typo in per_thread_tls.h by Derek Mauro <dmauro@google.com>
  - 76d5d25a54ab93c1ea3bc74b5a28ba335b0f2bab Implement InlinedVector::shrink_to_fit() method. by Abseil Team <absl-team@google.com>

GitOrigin-RevId: f679f7de2957ac4dca0a862d04f1165d2f503525
Change-Id: I03b39fdbd70c00a455d98d949d413dd7c8019578
This commit is contained in:
Abseil Team 2018-01-10 11:46:09 -08:00 • committed by Derek Mauro
parent 98bff8b2bc
commit c742b72354
3 changed files with 117 additions and 7 deletions
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11
absl/numeric/int128.h
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@ -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) {