Function pnegate

include/Eigen/Eigen/src/Core/GenericPacketMath.h:338–339

/** \internal \returns -a (coeff-wise) */
template<typename Packet> EIGEN_DEVICE_FUNC inline Packet
pnegate(const Packet& a) { return -a; }

template<> EIGEN_DEVICE_FUNC inline bool
pnegate(const bool& a) { return !a; }