Function Decimal256FromInt128

cpp/src/arrow/util/decimal_test.cc:2093–2096

}

Decimal256 Decimal256FromInt128(int128_t value) {
  return Decimal256(Decimal128(static_cast<int64_t>(value >> 64),
                               static_cast<uint64_t>(value & 0xFFFFFFFFFFFFFFFFULL)));
}

TEST(Decimal256Test, Multiply) {
  using boost::multiprecision::int256_t;