* extend the Has* packet traits and makes all functor use it

* extend the packing routines to support conjugation

Eigen/src/Core/GenericPacketMath.h

@@ -58,8 +58,11 @@ struct ei_default_packet_traits
     HasMul    = 1,
     HasNegate = 1,
     HasAbs    = 1,
+    HasAbs2   = 1,
     HasMin    = 1,
     HasMax    = 1,
+    HasConj   = 1,
+    HasSetLinear = 1,
 
     HasDiv    = 0,
     HasSqrt   = 0,
@@ -105,6 +108,10 @@ ei_psub(const Packet& a,
 template<typename Packet> inline Packet
 ei_pnegate(const Packet& a) { return -a; }
 
+/** \internal \returns conj(a) (coeff-wise) */
+template<typename Packet> inline Packet
+ei_pconj(const Packet& a) { return ei_conj(a); }
+
 /** \internal \returns a * b (coeff-wise) */
 template<typename Packet> inline Packet
 ei_pmul(const Packet& a,