diff options
Diffstat (limited to 'src/third_party/abseil-cpp-master/abseil-cpp/absl/numeric/int128.h')
| -rw-r--r-- | src/third_party/abseil-cpp-master/abseil-cpp/absl/numeric/int128.h | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/src/third_party/abseil-cpp-master/abseil-cpp/absl/numeric/int128.h b/src/third_party/abseil-cpp-master/abseil-cpp/absl/numeric/int128.h index 5d14a4a8962..9c36c57116c 100644 --- a/src/third_party/abseil-cpp-master/abseil-cpp/absl/numeric/int128.h +++ b/src/third_party/abseil-cpp-master/abseil-cpp/absl/numeric/int128.h @@ -37,6 +37,20 @@ #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(_WIN64) +#include <intrin.h> +#pragma intrinsic(_umul128) +#endif // defined(_WIN64) +#else // defined(_MSC_VER) +#define ABSL_INTERNAL_WCHAR_T wchar_t +#endif // defined(_MSC_VER) + namespace absl { @@ -126,7 +140,7 @@ class constexpr explicit operator unsigned char() const; constexpr explicit operator char16_t() const; constexpr explicit operator char32_t() const; - constexpr explicit operator wchar_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; @@ -266,9 +280,9 @@ class numeric_limits<absl::uint128> { #endif // ABSL_HAVE_INTRINSIC_INT128 static constexpr bool tinyness_before = false; - static constexpr absl::uint128 min() { return 0; } + 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 (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; } @@ -463,8 +477,8 @@ constexpr uint128::operator char32_t() const { return static_cast<char32_t>(lo_); } -constexpr uint128::operator wchar_t() const { - return static_cast<wchar_t>(lo_); +constexpr uint128::operator ABSL_INTERNAL_WCHAR_T() const { + return static_cast<ABSL_INTERNAL_WCHAR_T>(lo_); } // NOLINTNEXTLINE(runtime/int) @@ -661,6 +675,12 @@ inline uint128 operator*(uint128 lhs, uint128 rhs) { // can be used for uint128 storage. return static_cast<unsigned __int128>(lhs) * static_cast<unsigned __int128>(rhs); +#elif defined(_MSC_VER) && defined(_WIN64) + 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; @@ -708,4 +728,6 @@ inline uint128& uint128::operator--() { } // namespace absl +#undef ABSL_INTERNAL_WCHAR_T + #endif // ABSL_NUMERIC_INT128_H_ |