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Diffstat (limited to 'third_party/abseil_cpp/absl/numeric/int128.h')
| -rw-r--r-- | third_party/abseil_cpp/absl/numeric/int128.h | 1092 |
1 files changed, 0 insertions, 1092 deletions
diff --git a/third_party/abseil_cpp/absl/numeric/int128.h b/third_party/abseil_cpp/absl/numeric/int128.h deleted file mode 100644 index 0dd814a890..0000000000 --- a/third_party/abseil_cpp/absl/numeric/int128.h +++ /dev/null @@ -1,1092 +0,0 @@ -// -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -// ----------------------------------------------------------------------------- -// File: int128.h -// ----------------------------------------------------------------------------- -// -// This header file defines 128-bit integer types, `uint128` and `int128`. - -#ifndef ABSL_NUMERIC_INT128_H_ -#define ABSL_NUMERIC_INT128_H_ - -#include <cassert> -#include <cmath> -#include <cstdint> -#include <cstring> -#include <iosfwd> -#include <limits> -#include <utility> - -#include "absl/base/config.h" -#include "absl/base/macros.h" -#include "absl/base/port.h" - -#if defined(_MSC_VER) -// In very old versions of MSVC and when the /Zc:wchar_t flag is off, wchar_t is -// a typedef for unsigned short. Otherwise wchar_t is mapped to the __wchar_t -// builtin type. We need to make sure not to define operator wchar_t() -// alongside operator unsigned short() in these instances. -#define ABSL_INTERNAL_WCHAR_T __wchar_t -#if defined(_M_X64) -#include <intrin.h> -#pragma intrinsic(_umul128) -#endif // defined(_M_X64) -#else // defined(_MSC_VER) -#define ABSL_INTERNAL_WCHAR_T wchar_t -#endif // defined(_MSC_VER) - -namespace absl { -ABSL_NAMESPACE_BEGIN - -class int128; - -// uint128 -// -// An unsigned 128-bit integer type. The API is meant to mimic an intrinsic type -// as closely as is practical, including exhibiting undefined behavior in -// analogous cases (e.g. division by zero). This type is intended to be a -// drop-in replacement once C++ supports an intrinsic `uint128_t` type; when -// that occurs, existing well-behaved uses of `uint128` will continue to work -// using that new type. -// -// Note: code written with this type will continue to compile once `uint128_t` -// is introduced, provided the replacement helper functions -// `Uint128(Low|High)64()` and `MakeUint128()` are made. -// -// A `uint128` supports the following: -// -// * Implicit construction from integral types -// * Explicit conversion to integral types -// -// Additionally, if your compiler supports `__int128`, `uint128` is -// interoperable with that type. (Abseil checks for this compatibility through -// the `ABSL_HAVE_INTRINSIC_INT128` macro.) -// -// However, a `uint128` differs from intrinsic integral types in the following -// ways: -// -// * 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. -// * Conversion to integral types requires an explicit static_cast() to -// mimic use of the `-Wnarrowing` compiler flag. -// * The alignment requirement of `uint128` may differ from that of an -// intrinsic 128-bit integer type depending on platform and build -// configuration. -// -// Example: -// -// float y = absl::Uint128Max(); // Error. uint128 cannot be implicitly -// // converted to float. -// -// absl::uint128 v; -// uint64_t i = v; // Error -// uint64_t i = static_cast<uint64_t>(v); // OK -// -class -#if defined(ABSL_HAVE_INTRINSIC_INT128) - alignas(unsigned __int128) -#endif // ABSL_HAVE_INTRINSIC_INT128 - uint128 { - public: - uint128() = default; - - // Constructors from arithmetic types - constexpr uint128(int v); // NOLINT(runtime/explicit) - constexpr uint128(unsigned int v); // NOLINT(runtime/explicit) - constexpr uint128(long v); // NOLINT(runtime/int) - constexpr uint128(unsigned long v); // NOLINT(runtime/int) - constexpr uint128(long long v); // NOLINT(runtime/int) - constexpr uint128(unsigned long long v); // NOLINT(runtime/int) -#ifdef ABSL_HAVE_INTRINSIC_INT128 - constexpr uint128(__int128 v); // NOLINT(runtime/explicit) - constexpr uint128(unsigned __int128 v); // NOLINT(runtime/explicit) -#endif // ABSL_HAVE_INTRINSIC_INT128 - constexpr uint128(int128 v); // NOLINT(runtime/explicit) - explicit uint128(float v); - explicit uint128(double v); - explicit uint128(long double v); - - // Assignment operators from arithmetic types - uint128& operator=(int v); - uint128& operator=(unsigned int v); - uint128& operator=(long v); // NOLINT(runtime/int) - uint128& operator=(unsigned long v); // NOLINT(runtime/int) - uint128& operator=(long long v); // NOLINT(runtime/int) - uint128& operator=(unsigned long long v); // NOLINT(runtime/int) -#ifdef ABSL_HAVE_INTRINSIC_INT128 - uint128& operator=(__int128 v); - uint128& operator=(unsigned __int128 v); -#endif // ABSL_HAVE_INTRINSIC_INT128 - uint128& operator=(int128 v); - - // Conversion operators to other arithmetic types - constexpr explicit operator bool() const; - constexpr explicit operator char() const; - constexpr explicit operator signed char() const; - constexpr explicit operator unsigned char() const; - constexpr explicit operator char16_t() const; - constexpr explicit operator char32_t() const; - constexpr explicit operator ABSL_INTERNAL_WCHAR_T() const; - constexpr explicit operator short() const; // NOLINT(runtime/int) - // NOLINTNEXTLINE(runtime/int) - constexpr explicit operator unsigned short() const; - constexpr explicit operator int() const; - constexpr explicit operator unsigned int() const; - constexpr explicit operator long() const; // NOLINT(runtime/int) - // NOLINTNEXTLINE(runtime/int) - constexpr explicit operator unsigned long() const; - // NOLINTNEXTLINE(runtime/int) - constexpr explicit operator long long() const; - // NOLINTNEXTLINE(runtime/int) - constexpr explicit operator unsigned long long() const; -#ifdef ABSL_HAVE_INTRINSIC_INT128 - constexpr explicit operator __int128() const; - constexpr explicit operator unsigned __int128() const; -#endif // ABSL_HAVE_INTRINSIC_INT128 - explicit operator float() const; - explicit operator double() const; - explicit operator long double() const; - - // Trivial copy constructor, assignment operator and destructor. - - // Arithmetic operators. - uint128& operator+=(uint128 other); - uint128& operator-=(uint128 other); - uint128& operator*=(uint128 other); - // Long division/modulo for uint128. - uint128& operator/=(uint128 other); - uint128& operator%=(uint128 other); - uint128 operator++(int); - uint128 operator--(int); - uint128& operator<<=(int); - uint128& operator>>=(int); - uint128& operator&=(uint128 other); - uint128& operator|=(uint128 other); - uint128& operator^=(uint128 other); - uint128& operator++(); - uint128& operator--(); - - // Uint128Low64() - // - // Returns the lower 64-bit value of a `uint128` value. - friend constexpr uint64_t Uint128Low64(uint128 v); - - // Uint128High64() - // - // Returns the higher 64-bit value of a `uint128` value. - friend constexpr uint64_t Uint128High64(uint128 v); - - // MakeUInt128() - // - // Constructs a `uint128` numeric value from two 64-bit unsigned integers. - // Note that this factory function is the only way to construct a `uint128` - // from integer values greater than 2^64. - // - // Example: - // - // absl::uint128 big = absl::MakeUint128(1, 0); - friend constexpr uint128 MakeUint128(uint64_t high, uint64_t low); - - // Uint128Max() - // - // Returns the highest value for a 128-bit unsigned integer. - friend constexpr uint128 Uint128Max(); - - // Support for absl::Hash. - template <typename H> - friend H AbslHashValue(H h, uint128 v) { - return H::combine(std::move(h), Uint128High64(v), Uint128Low64(v)); - } - - private: - 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 - // alignas(16) to class definition to keep alignment consistent across - // platforms. -#if defined(ABSL_IS_LITTLE_ENDIAN) - uint64_t lo_; - uint64_t hi_; -#elif defined(ABSL_IS_BIG_ENDIAN) - uint64_t hi_; - uint64_t lo_; -#else // byte order -#error "Unsupported byte order: must be little-endian or big-endian." -#endif // byte order -}; - -// Prefer to use the constexpr `Uint128Max()`. -// -// TODO(absl-team) deprecate kuint128max once migration tool is released. -ABSL_DLL extern const uint128 kuint128max; - -// allow uint128 to be logged -std::ostream& operator<<(std::ostream& os, uint128 v); - -// TODO(strel) add operator>>(std::istream&, uint128) - -constexpr uint128 Uint128Max() { - return uint128((std::numeric_limits<uint64_t>::max)(), - (std::numeric_limits<uint64_t>::max)()); -} - -ABSL_NAMESPACE_END -} // namespace absl - -// Specialized numeric_limits for uint128. -namespace std { -template <> -class numeric_limits<absl::uint128> { - public: - static constexpr bool is_specialized = true; - static constexpr bool is_signed = false; - static constexpr bool is_integer = true; - static constexpr bool is_exact = true; - static constexpr bool has_infinity = false; - static constexpr bool has_quiet_NaN = false; - static constexpr bool has_signaling_NaN = false; - static constexpr float_denorm_style has_denorm = denorm_absent; - static constexpr bool has_denorm_loss = false; - static constexpr float_round_style round_style = round_toward_zero; - static constexpr bool is_iec559 = false; - static constexpr bool is_bounded = true; - static constexpr bool is_modulo = true; - static constexpr int digits = 128; - static constexpr int digits10 = 38; - static constexpr int max_digits10 = 0; - static constexpr int radix = 2; - static constexpr int min_exponent = 0; - static constexpr int min_exponent10 = 0; - static constexpr int max_exponent = 0; - static constexpr int max_exponent10 = 0; -#ifdef ABSL_HAVE_INTRINSIC_INT128 - static constexpr bool traps = numeric_limits<unsigned __int128>::traps; -#else // ABSL_HAVE_INTRINSIC_INT128 - static constexpr bool traps = numeric_limits<uint64_t>::traps; -#endif // ABSL_HAVE_INTRINSIC_INT128 - static constexpr bool tinyness_before = false; - - static constexpr absl::uint128 (min)() { return 0; } - static constexpr absl::uint128 lowest() { return 0; } - static constexpr absl::uint128 (max)() { return absl::Uint128Max(); } - static constexpr absl::uint128 epsilon() { return 0; } - static constexpr absl::uint128 round_error() { return 0; } - static constexpr absl::uint128 infinity() { return 0; } - static constexpr absl::uint128 quiet_NaN() { return 0; } - static constexpr absl::uint128 signaling_NaN() { return 0; } - static constexpr absl::uint128 denorm_min() { return 0; } -}; -} // namespace std - -namespace absl { -ABSL_NAMESPACE_BEGIN - -// int128 -// -// A signed 128-bit integer type. The API is meant to mimic an intrinsic -// integral type as closely as is practical, including exhibiting undefined -// behavior in analogous cases (e.g. division by zero). -// -// An `int128` supports the following: -// -// * Implicit construction from integral types -// * Explicit conversion to integral types -// -// However, an `int128` differs from intrinsic integral types in the following -// ways: -// -// * It is not implicitly convertible to other integral types. -// * Requires explicit construction from and conversion to floating point -// types. - -// Additionally, if your compiler supports `__int128`, `int128` is -// interoperable with that type. (Abseil checks for this compatibility through -// the `ABSL_HAVE_INTRINSIC_INT128` macro.) -// -// The design goal for `int128` is that it will be compatible with a future -// `int128_t`, if that type becomes a part of the standard. -// -// Example: -// -// float y = absl::int128(17); // Error. int128 cannot be implicitly -// // converted to float. -// -// absl::int128 v; -// int64_t i = v; // Error -// int64_t i = static_cast<int64_t>(v); // OK -// -class int128 { - public: - int128() = default; - - // Constructors from arithmetic types - constexpr int128(int v); // NOLINT(runtime/explicit) - constexpr int128(unsigned int v); // NOLINT(runtime/explicit) - constexpr int128(long v); // NOLINT(runtime/int) - constexpr int128(unsigned long v); // NOLINT(runtime/int) - constexpr int128(long long v); // NOLINT(runtime/int) - constexpr int128(unsigned long long v); // NOLINT(runtime/int) -#ifdef ABSL_HAVE_INTRINSIC_INT128 - constexpr int128(__int128 v); // NOLINT(runtime/explicit) - constexpr explicit int128(unsigned __int128 v); -#endif // ABSL_HAVE_INTRINSIC_INT128 - constexpr explicit int128(uint128 v); - explicit int128(float v); - explicit int128(double v); - explicit int128(long double v); - - // Assignment operators from arithmetic types - int128& operator=(int v); - int128& operator=(unsigned int v); - int128& operator=(long v); // NOLINT(runtime/int) - int128& operator=(unsigned long v); // NOLINT(runtime/int) - int128& operator=(long long v); // NOLINT(runtime/int) - int128& operator=(unsigned long long v); // NOLINT(runtime/int) -#ifdef ABSL_HAVE_INTRINSIC_INT128 - int128& operator=(__int128 v); -#endif // ABSL_HAVE_INTRINSIC_INT128 - - // Conversion operators to other arithmetic types - constexpr explicit operator bool() const; - constexpr explicit operator char() const; - constexpr explicit operator signed char() const; - constexpr explicit operator unsigned char() const; - constexpr explicit operator char16_t() const; - constexpr explicit operator char32_t() const; - constexpr explicit operator ABSL_INTERNAL_WCHAR_T() const; - constexpr explicit operator short() const; // NOLINT(runtime/int) - // NOLINTNEXTLINE(runtime/int) - constexpr explicit operator unsigned short() const; - constexpr explicit operator int() const; - constexpr explicit operator unsigned int() const; - constexpr explicit operator long() const; // NOLINT(runtime/int) - // NOLINTNEXTLINE(runtime/int) - constexpr explicit operator unsigned long() const; - // NOLINTNEXTLINE(runtime/int) - constexpr explicit operator long long() const; - // NOLINTNEXTLINE(runtime/int) - constexpr explicit operator unsigned long long() const; -#ifdef ABSL_HAVE_INTRINSIC_INT128 - constexpr explicit operator __int128() const; - constexpr explicit operator unsigned __int128() const; -#endif // ABSL_HAVE_INTRINSIC_INT128 - explicit operator float() const; - explicit operator double() const; - explicit operator long double() const; - - // Trivial copy constructor, assignment operator and destructor. - - // Arithmetic operators - int128& operator+=(int128 other); - int128& operator-=(int128 other); - int128& operator*=(int128 other); - int128& operator/=(int128 other); - int128& operator%=(int128 other); - int128 operator++(int); // postfix increment: i++ - int128 operator--(int); // postfix decrement: i-- - int128& operator++(); // prefix increment: ++i - int128& operator--(); // prefix decrement: --i - int128& operator&=(int128 other); - int128& operator|=(int128 other); - int128& operator^=(int128 other); - int128& operator<<=(int amount); - int128& operator>>=(int amount); - - // Int128Low64() - // - // Returns the lower 64-bit value of a `int128` value. - friend constexpr uint64_t Int128Low64(int128 v); - - // Int128High64() - // - // Returns the higher 64-bit value of a `int128` value. - friend constexpr int64_t Int128High64(int128 v); - - // MakeInt128() - // - // Constructs a `int128` numeric value from two 64-bit integers. Note that - // signedness is conveyed in the upper `high` value. - // - // (absl::int128(1) << 64) * high + low - // - // Note that this factory function is the only way to construct a `int128` - // from integer values greater than 2^64 or less than -2^64. - // - // Example: - // - // absl::int128 big = absl::MakeInt128(1, 0); - // absl::int128 big_n = absl::MakeInt128(-1, 0); - friend constexpr int128 MakeInt128(int64_t high, uint64_t low); - - // Int128Max() - // - // Returns the maximum value for a 128-bit signed integer. - friend constexpr int128 Int128Max(); - - // Int128Min() - // - // Returns the minimum value for a 128-bit signed integer. - friend constexpr int128 Int128Min(); - - // Support for absl::Hash. - template <typename H> - friend H AbslHashValue(H h, int128 v) { - return H::combine(std::move(h), Int128High64(v), Int128Low64(v)); - } - - private: - constexpr int128(int64_t high, uint64_t low); - -#if defined(ABSL_HAVE_INTRINSIC_INT128) - __int128 v_; -#else // ABSL_HAVE_INTRINSIC_INT128 -#if defined(ABSL_IS_LITTLE_ENDIAN) - uint64_t lo_; - int64_t hi_; -#elif defined(ABSL_IS_BIG_ENDIAN) - int64_t hi_; - uint64_t lo_; -#else // byte order -#error "Unsupported byte order: must be little-endian or big-endian." -#endif // byte order -#endif // ABSL_HAVE_INTRINSIC_INT128 -}; - -std::ostream& operator<<(std::ostream& os, int128 v); - -// TODO(absl-team) add operator>>(std::istream&, int128) - -constexpr int128 Int128Max() { - return int128((std::numeric_limits<int64_t>::max)(), - (std::numeric_limits<uint64_t>::max)()); -} - -constexpr int128 Int128Min() { - return int128((std::numeric_limits<int64_t>::min)(), 0); -} - -ABSL_NAMESPACE_END -} // namespace absl - -// Specialized numeric_limits for int128. -namespace std { -template <> -class numeric_limits<absl::int128> { - public: - static constexpr bool is_specialized = true; - static constexpr bool is_signed = true; - static constexpr bool is_integer = true; - static constexpr bool is_exact = true; - static constexpr bool has_infinity = false; - static constexpr bool has_quiet_NaN = false; - static constexpr bool has_signaling_NaN = false; - static constexpr float_denorm_style has_denorm = denorm_absent; - static constexpr bool has_denorm_loss = false; - static constexpr float_round_style round_style = round_toward_zero; - static constexpr bool is_iec559 = false; - static constexpr bool is_bounded = true; - static constexpr bool is_modulo = false; - static constexpr int digits = 127; - static constexpr int digits10 = 38; - static constexpr int max_digits10 = 0; - static constexpr int radix = 2; - static constexpr int min_exponent = 0; - static constexpr int min_exponent10 = 0; - static constexpr int max_exponent = 0; - static constexpr int max_exponent10 = 0; -#ifdef ABSL_HAVE_INTRINSIC_INT128 - static constexpr bool traps = numeric_limits<__int128>::traps; -#else // ABSL_HAVE_INTRINSIC_INT128 - static constexpr bool traps = numeric_limits<uint64_t>::traps; -#endif // ABSL_HAVE_INTRINSIC_INT128 - static constexpr bool tinyness_before = false; - - static constexpr absl::int128 (min)() { return absl::Int128Min(); } - static constexpr absl::int128 lowest() { return absl::Int128Min(); } - static constexpr absl::int128 (max)() { return absl::Int128Max(); } - static constexpr absl::int128 epsilon() { return 0; } - static constexpr absl::int128 round_error() { return 0; } - static constexpr absl::int128 infinity() { return 0; } - static constexpr absl::int128 quiet_NaN() { return 0; } - static constexpr absl::int128 signaling_NaN() { return 0; } - static constexpr absl::int128 denorm_min() { return 0; } -}; -} // namespace std - -// -------------------------------------------------------------------------- -// Implementation details follow -// -------------------------------------------------------------------------- -namespace absl { -ABSL_NAMESPACE_BEGIN - -constexpr uint128 MakeUint128(uint64_t high, uint64_t low) { - return uint128(high, low); -} - -// Assignment from integer types. - -inline uint128& uint128::operator=(int v) { return *this = uint128(v); } - -inline uint128& uint128::operator=(unsigned int v) { - return *this = uint128(v); -} - -inline uint128& uint128::operator=(long v) { // NOLINT(runtime/int) - return *this = uint128(v); -} - -// NOLINTNEXTLINE(runtime/int) -inline uint128& uint128::operator=(unsigned long v) { - return *this = uint128(v); -} - -// NOLINTNEXTLINE(runtime/int) -inline uint128& uint128::operator=(long long v) { - return *this = uint128(v); -} - -// NOLINTNEXTLINE(runtime/int) -inline uint128& uint128::operator=(unsigned long long v) { - return *this = uint128(v); -} - -#ifdef ABSL_HAVE_INTRINSIC_INT128 -inline uint128& uint128::operator=(__int128 v) { - return *this = uint128(v); -} - -inline uint128& uint128::operator=(unsigned __int128 v) { - return *this = uint128(v); -} -#endif // ABSL_HAVE_INTRINSIC_INT128 - -inline uint128& uint128::operator=(int128 v) { - return *this = uint128(v); -} - -// Arithmetic operators. - -uint128 operator<<(uint128 lhs, int amount); -uint128 operator>>(uint128 lhs, int amount); -uint128 operator+(uint128 lhs, uint128 rhs); -uint128 operator-(uint128 lhs, uint128 rhs); -uint128 operator*(uint128 lhs, uint128 rhs); -uint128 operator/(uint128 lhs, uint128 rhs); -uint128 operator%(uint128 lhs, uint128 rhs); - -inline uint128& uint128::operator<<=(int amount) { - *this = *this << amount; - return *this; -} - -inline uint128& uint128::operator>>=(int amount) { - *this = *this >> amount; - return *this; -} - -inline uint128& uint128::operator+=(uint128 other) { - *this = *this + other; - return *this; -} - -inline uint128& uint128::operator-=(uint128 other) { - *this = *this - other; - return *this; -} - -inline uint128& uint128::operator*=(uint128 other) { - *this = *this * other; - return *this; -} - -inline uint128& uint128::operator/=(uint128 other) { - *this = *this / other; - return *this; -} - -inline uint128& uint128::operator%=(uint128 other) { - *this = *this % other; - return *this; -} - -constexpr uint64_t Uint128Low64(uint128 v) { return v.lo_; } - -constexpr uint64_t Uint128High64(uint128 v) { return v.hi_; } - -// Constructors from integer types. - -#if defined(ABSL_IS_LITTLE_ENDIAN) - -constexpr uint128::uint128(uint64_t high, uint64_t low) - : lo_{low}, hi_{high} {} - -constexpr uint128::uint128(int v) - : lo_{static_cast<uint64_t>(v)}, - hi_{v < 0 ? (std::numeric_limits<uint64_t>::max)() : 0} {} -constexpr uint128::uint128(long v) // NOLINT(runtime/int) - : lo_{static_cast<uint64_t>(v)}, - hi_{v < 0 ? (std::numeric_limits<uint64_t>::max)() : 0} {} -constexpr uint128::uint128(long long v) // NOLINT(runtime/int) - : lo_{static_cast<uint64_t>(v)}, - hi_{v < 0 ? (std::numeric_limits<uint64_t>::max)() : 0} {} - -constexpr uint128::uint128(unsigned int v) : lo_{v}, hi_{0} {} -// NOLINTNEXTLINE(runtime/int) -constexpr uint128::uint128(unsigned long v) : lo_{v}, hi_{0} {} -// NOLINTNEXTLINE(runtime/int) -constexpr uint128::uint128(unsigned long long v) : lo_{v}, hi_{0} {} - -#ifdef ABSL_HAVE_INTRINSIC_INT128 -constexpr uint128::uint128(__int128 v) - : lo_{static_cast<uint64_t>(v & ~uint64_t{0})}, - hi_{static_cast<uint64_t>(static_cast<unsigned __int128>(v) >> 64)} {} -constexpr uint128::uint128(unsigned __int128 v) - : lo_{static_cast<uint64_t>(v & ~uint64_t{0})}, - hi_{static_cast<uint64_t>(v >> 64)} {} -#endif // ABSL_HAVE_INTRINSIC_INT128 - -constexpr uint128::uint128(int128 v) - : lo_{Int128Low64(v)}, hi_{static_cast<uint64_t>(Int128High64(v))} {} - -#elif defined(ABSL_IS_BIG_ENDIAN) - -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_{static_cast<uint64_t>(v)} {} -constexpr uint128::uint128(long v) // NOLINT(runtime/int) - : hi_{v < 0 ? (std::numeric_limits<uint64_t>::max)() : 0}, - lo_{static_cast<uint64_t>(v)} {} -constexpr uint128::uint128(long long v) // NOLINT(runtime/int) - : hi_{v < 0 ? (std::numeric_limits<uint64_t>::max)() : 0}, - lo_{static_cast<uint64_t>(v)} {} - -constexpr uint128::uint128(unsigned int v) : hi_{0}, lo_{v} {} -// NOLINTNEXTLINE(runtime/int) -constexpr uint128::uint128(unsigned long v) : hi_{0}, lo_{v} {} -// NOLINTNEXTLINE(runtime/int) -constexpr uint128::uint128(unsigned long long v) : hi_{0}, lo_{v} {} - -#ifdef ABSL_HAVE_INTRINSIC_INT128 -constexpr uint128::uint128(__int128 v) - : hi_{static_cast<uint64_t>(static_cast<unsigned __int128>(v) >> 64)}, - lo_{static_cast<uint64_t>(v & ~uint64_t{0})} {} -constexpr uint128::uint128(unsigned __int128 v) - : hi_{static_cast<uint64_t>(v >> 64)}, - lo_{static_cast<uint64_t>(v & ~uint64_t{0})} {} -#endif // ABSL_HAVE_INTRINSIC_INT128 - -constexpr uint128::uint128(int128 v) - : hi_{static_cast<uint64_t>(Int128High64(v))}, lo_{Int128Low64(v)} {} - -#else // byte order -#error "Unsupported byte order: must be little-endian or big-endian." -#endif // byte order - -// Conversion operators to integer types. - -constexpr uint128::operator bool() const { return lo_ || hi_; } - -constexpr uint128::operator char() const { return static_cast<char>(lo_); } - -constexpr uint128::operator signed char() const { - return static_cast<signed char>(lo_); -} - -constexpr uint128::operator unsigned char() const { - return static_cast<unsigned char>(lo_); -} - -constexpr uint128::operator char16_t() const { - return static_cast<char16_t>(lo_); -} - -constexpr uint128::operator char32_t() const { - return static_cast<char32_t>(lo_); -} - -constexpr uint128::operator ABSL_INTERNAL_WCHAR_T() const { - return static_cast<ABSL_INTERNAL_WCHAR_T>(lo_); -} - -// NOLINTNEXTLINE(runtime/int) -constexpr uint128::operator short() const { return static_cast<short>(lo_); } - -constexpr uint128::operator unsigned short() const { // NOLINT(runtime/int) - return static_cast<unsigned short>(lo_); // NOLINT(runtime/int) -} - -constexpr uint128::operator int() const { return static_cast<int>(lo_); } - -constexpr uint128::operator unsigned int() const { - return static_cast<unsigned int>(lo_); -} - -// NOLINTNEXTLINE(runtime/int) -constexpr uint128::operator long() const { return static_cast<long>(lo_); } - -constexpr uint128::operator unsigned long() const { // NOLINT(runtime/int) - return static_cast<unsigned long>(lo_); // NOLINT(runtime/int) -} - -constexpr uint128::operator long long() const { // NOLINT(runtime/int) - return static_cast<long long>(lo_); // NOLINT(runtime/int) -} - -constexpr uint128::operator unsigned long long() const { // NOLINT(runtime/int) - return static_cast<unsigned long long>(lo_); // NOLINT(runtime/int) -} - -#ifdef ABSL_HAVE_INTRINSIC_INT128 -constexpr uint128::operator __int128() const { - return (static_cast<__int128>(hi_) << 64) + lo_; -} - -constexpr uint128::operator unsigned __int128() const { - return (static_cast<unsigned __int128>(hi_) << 64) + lo_; -} -#endif // ABSL_HAVE_INTRINSIC_INT128 - -// Conversion operators to floating point types. - -inline uint128::operator float() const { - return static_cast<float>(lo_) + std::ldexp(static_cast<float>(hi_), 64); -} - -inline uint128::operator double() const { - return static_cast<double>(lo_) + std::ldexp(static_cast<double>(hi_), 64); -} - -inline uint128::operator long double() const { - return static_cast<long double>(lo_) + - std::ldexp(static_cast<long double>(hi_), 64); -} - -// Comparison operators. - -inline bool operator==(uint128 lhs, uint128 rhs) { - return (Uint128Low64(lhs) == Uint128Low64(rhs) && - Uint128High64(lhs) == Uint128High64(rhs)); -} - -inline bool operator!=(uint128 lhs, uint128 rhs) { - return !(lhs == rhs); -} - -inline bool operator<(uint128 lhs, uint128 rhs) { -#ifdef ABSL_HAVE_INTRINSIC_INT128 - return static_cast<unsigned __int128>(lhs) < - static_cast<unsigned __int128>(rhs); -#else - return (Uint128High64(lhs) == Uint128High64(rhs)) - ? (Uint128Low64(lhs) < Uint128Low64(rhs)) - : (Uint128High64(lhs) < Uint128High64(rhs)); -#endif -} - -inline bool operator>(uint128 lhs, uint128 rhs) { return rhs < lhs; } - -inline bool operator<=(uint128 lhs, uint128 rhs) { return !(rhs < lhs); } - -inline bool operator>=(uint128 lhs, uint128 rhs) { return !(lhs < rhs); } - -// Unary operators. - -inline uint128 operator-(uint128 val) { - 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) { - return !Uint128High64(val) && !Uint128Low64(val); -} - -// Logical operators. - -inline uint128 operator~(uint128 val) { - return MakeUint128(~Uint128High64(val), ~Uint128Low64(val)); -} - -inline uint128 operator|(uint128 lhs, uint128 rhs) { - return MakeUint128(Uint128High64(lhs) | Uint128High64(rhs), - Uint128Low64(lhs) | Uint128Low64(rhs)); -} - -inline uint128 operator&(uint128 lhs, uint128 rhs) { - return MakeUint128(Uint128High64(lhs) & Uint128High64(rhs), - Uint128Low64(lhs) & Uint128Low64(rhs)); -} - -inline uint128 operator^(uint128 lhs, uint128 rhs) { - return MakeUint128(Uint128High64(lhs) ^ Uint128High64(rhs), - Uint128Low64(lhs) ^ Uint128Low64(rhs)); -} - -inline uint128& uint128::operator|=(uint128 other) { - hi_ |= other.hi_; - lo_ |= other.lo_; - return *this; -} - -inline uint128& uint128::operator&=(uint128 other) { - hi_ &= other.hi_; - lo_ &= other.lo_; - return *this; -} - -inline uint128& uint128::operator^=(uint128 other) { - hi_ ^= other.hi_; - lo_ ^= other.lo_; - return *this; -} - -// Arithmetic operators. - -inline uint128 operator<<(uint128 lhs, int amount) { -#ifdef ABSL_HAVE_INTRINSIC_INT128 - return static_cast<unsigned __int128>(lhs) << amount; -#else - // uint64_t shifts of >= 64 are undefined, so we will need some - // special-casing. - if (amount < 64) { - if (amount != 0) { - return MakeUint128( - (Uint128High64(lhs) << amount) | (Uint128Low64(lhs) >> (64 - amount)), - Uint128Low64(lhs) << amount); - } - return lhs; - } - return MakeUint128(Uint128Low64(lhs) << (amount - 64), 0); -#endif -} - -inline uint128 operator>>(uint128 lhs, int amount) { -#ifdef ABSL_HAVE_INTRINSIC_INT128 - return static_cast<unsigned __int128>(lhs) >> amount; -#else - // uint64_t shifts of >= 64 are undefined, so we will need some - // special-casing. - if (amount < 64) { - if (amount != 0) { - return MakeUint128(Uint128High64(lhs) >> amount, - (Uint128Low64(lhs) >> amount) | - (Uint128High64(lhs) << (64 - amount))); - } - return lhs; - } - return MakeUint128(0, Uint128High64(lhs) >> (amount - 64)); -#endif -} - -inline uint128 operator+(uint128 lhs, uint128 rhs) { - uint128 result = MakeUint128(Uint128High64(lhs) + Uint128High64(rhs), - Uint128Low64(lhs) + Uint128Low64(rhs)); - if (Uint128Low64(result) < Uint128Low64(lhs)) { // check for carry - return MakeUint128(Uint128High64(result) + 1, Uint128Low64(result)); - } - return result; -} - -inline uint128 operator-(uint128 lhs, uint128 rhs) { - uint128 result = MakeUint128(Uint128High64(lhs) - Uint128High64(rhs), - Uint128Low64(lhs) - Uint128Low64(rhs)); - if (Uint128Low64(lhs) < Uint128Low64(rhs)) { // check for carry - return MakeUint128(Uint128High64(result) - 1, Uint128Low64(result)); - } - return result; -} - -inline uint128 operator*(uint128 lhs, uint128 rhs) { -#if defined(ABSL_HAVE_INTRINSIC_INT128) - // TODO(strel) Remove once alignment issues are resolved and unsigned __int128 - // can be used for uint128 storage. - return static_cast<unsigned __int128>(lhs) * - static_cast<unsigned __int128>(rhs); -#elif defined(_MSC_VER) && defined(_M_X64) - uint64_t carry; - uint64_t low = _umul128(Uint128Low64(lhs), Uint128Low64(rhs), &carry); - return MakeUint128(Uint128Low64(lhs) * Uint128High64(rhs) + - Uint128High64(lhs) * Uint128Low64(rhs) + carry, - low); -#else // ABSL_HAVE_INTRINSIC128 - uint64_t a32 = Uint128Low64(lhs) >> 32; - uint64_t a00 = Uint128Low64(lhs) & 0xffffffff; - uint64_t b32 = Uint128Low64(rhs) >> 32; - uint64_t b00 = Uint128Low64(rhs) & 0xffffffff; - uint128 result = - MakeUint128(Uint128High64(lhs) * Uint128Low64(rhs) + - Uint128Low64(lhs) * Uint128High64(rhs) + a32 * b32, - a00 * b00); - result += uint128(a32 * b00) << 32; - result += uint128(a00 * b32) << 32; - return result; -#endif // ABSL_HAVE_INTRINSIC128 -} - -// Increment/decrement operators. - -inline uint128 uint128::operator++(int) { - uint128 tmp(*this); - *this += 1; - return tmp; -} - -inline uint128 uint128::operator--(int) { - uint128 tmp(*this); - *this -= 1; - return tmp; -} - -inline uint128& uint128::operator++() { - *this += 1; - return *this; -} - -inline uint128& uint128::operator--() { - *this -= 1; - return *this; -} - -constexpr int128 MakeInt128(int64_t high, uint64_t low) { - return int128(high, low); -} - -// Assignment from integer types. -inline int128& int128::operator=(int v) { - return *this = int128(v); -} - -inline int128& int128::operator=(unsigned int v) { - return *this = int128(v); -} - -inline int128& int128::operator=(long v) { // NOLINT(runtime/int) - return *this = int128(v); -} - -// NOLINTNEXTLINE(runtime/int) -inline int128& int128::operator=(unsigned long v) { - return *this = int128(v); -} - -// NOLINTNEXTLINE(runtime/int) -inline int128& int128::operator=(long long v) { - return *this = int128(v); -} - -// NOLINTNEXTLINE(runtime/int) -inline int128& int128::operator=(unsigned long long v) { - return *this = int128(v); -} - -// Arithmetic operators. - -int128 operator+(int128 lhs, int128 rhs); -int128 operator-(int128 lhs, int128 rhs); -int128 operator*(int128 lhs, int128 rhs); -int128 operator/(int128 lhs, int128 rhs); -int128 operator%(int128 lhs, int128 rhs); -int128 operator|(int128 lhs, int128 rhs); -int128 operator&(int128 lhs, int128 rhs); -int128 operator^(int128 lhs, int128 rhs); -int128 operator<<(int128 lhs, int amount); -int128 operator>>(int128 lhs, int amount); - -inline int128& int128::operator+=(int128 other) { - *this = *this + other; - return *this; -} - -inline int128& int128::operator-=(int128 other) { - *this = *this - other; - return *this; -} - -inline int128& int128::operator*=(int128 other) { - *this = *this * other; - return *this; -} - -inline int128& int128::operator/=(int128 other) { - *this = *this / other; - return *this; -} - -inline int128& int128::operator%=(int128 other) { - *this = *this % other; - return *this; -} - -inline int128& int128::operator|=(int128 other) { - *this = *this | other; - return *this; -} - -inline int128& int128::operator&=(int128 other) { - *this = *this & other; - return *this; -} - -inline int128& int128::operator^=(int128 other) { - *this = *this ^ other; - return *this; -} - -inline int128& int128::operator<<=(int amount) { - *this = *this << amount; - return *this; -} - -inline int128& int128::operator>>=(int amount) { - *this = *this >> amount; - return *this; -} - -namespace int128_internal { - -// Casts from unsigned to signed while preserving the underlying binary -// representation. -constexpr int64_t BitCastToSigned(uint64_t v) { - // Casting an unsigned integer to a signed integer of the same - // width is implementation defined behavior if the source value would not fit - // in the destination type. We step around it with a roundtrip bitwise not - // operation to make sure this function remains constexpr. Clang, GCC, and - // MSVC optimize this to a no-op on x86-64. - return v & (uint64_t{1} << 63) ? ~static_cast<int64_t>(~v) - : static_cast<int64_t>(v); -} - -} // namespace int128_internal - -#if defined(ABSL_HAVE_INTRINSIC_INT128) -#include "absl/numeric/int128_have_intrinsic.inc" // IWYU pragma: export -#else // ABSL_HAVE_INTRINSIC_INT128 -#include "absl/numeric/int128_no_intrinsic.inc" // IWYU pragma: export -#endif // ABSL_HAVE_INTRINSIC_INT128 - -ABSL_NAMESPACE_END -} // namespace absl - -#undef ABSL_INTERNAL_WCHAR_T - -#endif // ABSL_NUMERIC_INT128_H_ |