commit 65716e99a5763f536257eb1dd047f34f8172f816
author Benoit Steiner <benoit.steiner.goog@gmail.com> Fri Mar 25 11:13:53 2016 -0700
committer Benoit Steiner <benoit.steiner.goog@gmail.com> Fri Mar 25 11:13:53 2016 -0700
tree 1159e83c34245acecd8e8e64dc47fe7607f74dda
parent d94f6ba9659f8c953caaff854552070ce149958b

Improved the cost estimate of the quotient op

Eigen/src/Core/functors/BinaryFunctors.h

diff --git a/Eigen/src/Core/functors/BinaryFunctors.h b/Eigen/src/Core/functors/BinaryFunctors.h
index d04323b..e28fecf 100644
--- a/Eigen/src/Core/functors/BinaryFunctors.h
+++ b/Eigen/src/Core/functors/BinaryFunctors.h
@@ -303,9 +303,10 @@
 };
 template<typename LhsScalar,typename RhsScalar>
 struct functor_traits<scalar_quotient_op<LhsScalar,RhsScalar> > {
+  typedef typename scalar_quotient_op<LhsScalar,RhsScalar>::result_type result_type;
   enum {
-    Cost = (NumTraits<LhsScalar>::MulCost + NumTraits<RhsScalar>::MulCost), // rough estimate!
-    PacketAccess = scalar_quotient_op<LhsScalar,RhsScalar>::Vectorizable
+    PacketAccess = scalar_quotient_op<LhsScalar,RhsScalar>::Vectorizable,
+    Cost = NumTraits<result_type>::template Div<PacketAccess>::Cost
   };
 };