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