Function pandnot

include/Eigen/src/Core/GenericPacketMath.h:578–580

/** \internal \returns the bitwise and of \a a and not \a b */
template <typename Packet>
EIGEN_DEVICE_FUNC inline Packet pandnot(const Packet& a, const Packet& b) {
  return pand(a, pnot(b));
}

// In the general case, use bitwise select.
template <typename Packet, typename EnableIf = void>