forked from suyu/suyu
31 lines
509 B
C++
31 lines
509 B
C++
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#include <array>
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#include <cstdint>
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#include <utility>
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#include <cstring>
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#include "common/common_types.h"
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namespace Common {
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#ifdef _MSC_VER
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#include <intrin.h>
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#pragma intrinsic(_umul128)
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#endif
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inline u128 umul128(u64 a, u64 b) {
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#ifdef _MSC_VER
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u128 result;
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result[0] = _umul128(a, b, &result[1]);
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#else
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unsigned __int128 tmp = a;
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tmp *= b;
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u128 result;
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std::memcpy(&result, &tmp, sizeof(u128));
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#endif
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return result;
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}
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std::pair<u64, u64> udiv128(u128 dividend, u64 divisor);
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} // namespace Common
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