commit 44044e25b14d7e623baae4505a17c913bdde59f8
author Sameer Agarwal <sameeragarwal@google.com> Wed Aug 31 05:50:58 2016 -0700
committer Sameer Agarwal <sameeragarwal@google.com> Wed Aug 31 06:19:08 2016 -0700
tree 423e9ccc831db8021fb9ce2fa201b61d6567a9e1
parent 4b6ad5d88e45ce8638c882d3e8f08161089b6dba

Update the NumTraits for Jets

1. Use AVX if EIGEN_VECTORIZE_AVX is defined.
2. Make the cost of division same as the cost of multiplication.

These are updates to the original numtraits update needed for eigen 3.3
that Shaheen Gandhi sent out.

Change-Id: Ic1e3ed7d05a659c7badc79a894679b2dd61c51b9

include/ceres/jet.h

diff --git a/include/ceres/jet.h b/include/ceres/jet.h
index 5b6c0ca..a104707 100644
--- a/include/ceres/jet.h
+++ b/include/ceres/jet.h
@@ -836,8 +836,15 @@
   template<bool Vectorized>
   struct Div {
     enum {
+#if defined(EIGEN_VECTORIZE_AVX)
+      AVX = true,
+#else
       AVX = false,
-      Cost = 1
+#endif
+
+      // Assuming that for Jets, division is as expensive as
+      // multiplication.
+      Cost = 3
     };
   };
 };