EIGEN_STRONG_INLINE QInt32 operator*(const QInt16 a, const QUInt16 b) {
  return QInt32(static_cast<int32_t>(a.value) * static_cast<int32_t>(b.value));
}
EIGEN_STRONG_INLINE QInt32 operator*(const QInt16 a, const QUInt16 b) {
  return QInt32(static_cast<int32_t>(a.value) * static_cast<int32_t>(b.value));
}