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Cleanup udiv128 (#206)

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Tom Lally 2022-09-08 01:12:53 +01:00 • committed by GitHub
parent 4eaa600b57
commit 6cdb6eed17
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4 changed files with 9 additions and 19 deletions
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9
src/Common/precompiled.h
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@ -210,6 +210,15 @@ typedef union _LARGE_INTEGER {
inline T& operator^= (T& a, T b) { return reinterpret_cast<T&>( reinterpret_cast<std::underlying_type<T>::type&>(a) ^= static_cast<std::underlying_type<T>::type>(b) ); }
#endif
#if !defined(_MSC_VER) || defined(__clang__) // clang-cl does not have built-in _udiv128
inline uint64 _udiv128(uint64 highDividend, uint64 lowDividend, uint64 divisor, uint64 *remainder)
{
unsigned __int128 dividend = (((unsigned __int128)highDividend) << 64) | ((unsigned __int128)lowDividend);
*remainder = (uint64)((dividend % divisor) & 0xFFFFFFFFFFFFFFFF);
return (uint64)((dividend / divisor) & 0xFFFFFFFFFFFFFFFF);
}
#endif
#if defined(_MSC_VER)
#define UNREACHABLE __assume(false)
#elif defined(__GNUC__)