Introducing "vectorized" byte on unpacket_traits structs

This is a preparation to a change on gebp_traits, where a new template
argument will be introduced to dictate the packet size, so it won't be
bound to the current/max packet size only anymore.

By having packet types defined early on gebp_traits, one has now to
act on packet types, not scalars anymore, for the enum values defined
on that class. One approach for reaching the vectorizable/size
properties one needs there could be getting the packet's scalar again
with unpacket_traits<>, then the size/Vectorizable enum entries from
packet_traits<>. It turns out guards like "#ifndef
EIGEN_VECTORIZE_AVX512" at AVX/PacketMath.h will hide smaller packet
variations of packet_traits<> for some types (and it makes sense to
keep that). In other words, one can't go back to the scalar and create
a new PacketType, as this will always lead to the maximum packet type
for the architecture.

The less costly/invasive solution for that, thus, is to add the
vectorizable info on every unpacket_traits struct as well.

1 files changed, 3 insertions, 3 deletions

diff --git a/Eigen/src/Core/arch/NEON/PacketMath.h b/Eigen/src/Core/arch/NEON/PacketMath.h
index ed3cec88a..ca4f2bf94 100644
--- a/Eigen/src/Core/arch/NEON/PacketMath.h
+++ b/Eigen/src/Core/arch/NEON/PacketMath.h
@@ -145,13 +145,13 @@ template<> struct unpacket_traits<Packet4f>
   typedef float     type;
   typedef Packet4f  half;
   typedef Packet4i  integer_packet;
-  enum {size=4, alignment=Aligned16};
+  enum {size=4, alignment=Aligned16, vectorizable=true};
 };
 template<> struct unpacket_traits<Packet4i>
 {
   typedef int32_t   type;
   typedef Packet4i  half;
-  enum {size=4, alignment=Aligned16};
+  enum {size=4, alignment=Aligned16, vectorizable=true};
 };
 
 template<> EIGEN_STRONG_INLINE Packet4f pset1<Packet4f>(const float&  from) { return vdupq_n_f32(from); }
@@ -650,7 +650,7 @@ template<> struct packet_traits<double>  : default_packet_traits
   };
 };
 
-template<> struct unpacket_traits<Packet2d> { typedef double  type; enum {size=2, alignment=Aligned16}; typedef Packet2d half; };
+template<> struct unpacket_traits<Packet2d> { typedef double  type; enum {size=2, alignment=Aligned16, vectorizable=true}; typedef Packet2d half; };
 
 template<> EIGEN_STRONG_INLINE Packet2d pset1<Packet2d>(const double&  from) { return vdupq_n_f64(from); }