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Changes imported from Abseil "staging" branch:

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- 8dea174f3f4178dd8b428e5cf73c37c4eefeb2ea Minor style changes and reorganization. Add missing copyr... by Alex Strelnikov <strel@google.com>

GitOrigin-RevId: 8dea174f3f4178dd8b428e5cf73c37c4eefeb2ea
Change-Id: I239f9dd6882172790b241f1af7a2acb23d54fb61
This commit is contained in:
Abseil Team 2018-01-09 08:46:23 -08:00 • committed by Derek Mauro
parent 4132ce2595
commit 25274b35a0
4 changed files with 64 additions and 28 deletions
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20
absl/numeric/int128.h
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@ -62,7 +62,7 @@ namespace absl {
// However, a `uint128` differs from intrinsic integral types in the following
// ways:
//
// * Errors on implicit conversions that does not preserve value (such as
// * Errors on implicit conversions that do not preserve value (such as
// loss of precision when converting to float values).
// * Requires explicit construction from and conversion to floating point
// types.
@ -175,10 +175,10 @@ class alignas(16) uint128 {
// Example:
//
// absl::uint128 big = absl::MakeUint128(1, 0);
friend constexpr uint128 MakeUint128(uint64_t top, uint64_t bottom);
friend constexpr uint128 MakeUint128(uint64_t high, uint64_t low);
private:
constexpr uint128(uint64_t top, uint64_t bottom);
constexpr uint128(uint64_t high, uint64_t low);
// TODO(strel) Update implementation to use __int128 once all users of
// uint128 are fixed to not depend on alignof(uint128) == 8. Also add
@ -198,7 +198,7 @@ class alignas(16) uint128 {
extern const uint128 kuint128max;
// allow uint128 to be logged
extern std::ostream& operator<<(std::ostream& o, uint128 b);
extern std::ostream& operator<<(std::ostream& os, uint128 v);
// TODO(strel) add operator>>(std::istream&, uint128)
@ -208,8 +208,8 @@ extern std::ostream& operator<<(std::ostream& o, uint128 b);
// Implementation details follow
// --------------------------------------------------------------------------
constexpr uint128 MakeUint128(uint64_t top, uint64_t bottom) {
return uint128(top, bottom);
constexpr uint128 MakeUint128(uint64_t high, uint64_t low) {
return uint128(high, low);
}
// Assignment from integer types.
@ -287,8 +287,8 @@ constexpr uint64_t Uint128High64(uint128 v) { return v.hi_; }
#if defined(ABSL_IS_LITTLE_ENDIAN)
constexpr uint128::uint128(uint64_t top, uint64_t bottom)
: lo_(bottom), hi_(top) {}
constexpr uint128::uint128(uint64_t high, uint64_t low)
: lo_(low), hi_(high) {}
constexpr uint128::uint128(int v)
: lo_(v), hi_(v < 0 ? std::numeric_limits<uint64_t>::max() : 0) {}
@ -314,8 +314,8 @@ constexpr uint128::uint128(unsigned __int128 v)
#elif defined(ABSL_IS_BIG_ENDIAN)
constexpr uint128::uint128(uint64_t top, uint64_t bottom)
: hi_(top), lo_(bottom) {}
constexpr uint128::uint128(uint64_t high, uint64_t low)
: hi_(high), lo_(low) {}
constexpr uint128::uint128(int v)
: hi_(v < 0 ? std::numeric_limits<uint64_t>::max() : 0), lo_(v) {}