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Diffstat (limited to 'src/common/uint128.h')
-rw-r--r-- | src/common/uint128.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/common/uint128.h b/src/common/uint128.h new file mode 100644 index 000000000..fda313bcc --- /dev/null +++ b/src/common/uint128.h @@ -0,0 +1,30 @@ +#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 |