Function pmin

dependency/densecrf/include/Eigen/src/Core/GenericPacketMath.h:511–512

/** \internal \returns the min of \a a and \a b  (coeff-wise).
    If \a a or \b b is NaN, the return value is implementation defined. */
template<typename Packet> EIGEN_DEVICE_FUNC inline Packet
pmin(const Packet& a, const Packet& b) { return numext::mini(a,b); }

/** \internal \returns the min of \a a and \a b  (coeff-wise).
    NaNPropagation determines the NaN propagation semantics. */