From: Matthias Maier <tamiko@43-1.org>
Date: Mon, 11 May 2020 21:19:08 +0000 (-0500)
Subject: Fix compilation with gcc-4.9.4
X-Git-Tag: v9.2.0-rc1~17^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F10149%2Fhead;p=dealii.git

Fix compilation with gcc-4.9.4

Closes: https://github.com/dealii/dealii/issues/10146
---

diff --git a/include/deal.II/matrix_free/mapping_info.templates.h b/include/deal.II/matrix_free/mapping_info.templates.h
index b7d7b5bae9..39fc06fea4 100644
--- a/include/deal.II/matrix_free/mapping_info.templates.h
+++ b/include/deal.II/matrix_free/mapping_info.templates.h
@@ -2565,11 +2565,13 @@ namespace internal
       // evaluate the geometry in double precision; thus, for floats we need
       // to do things in two sweeps and convert the final result.
       constexpr unsigned int n_lanes = VectorizedArrayType::size();
+
       using VectorizedDouble =
         VectorizedArray<double,
-                        ((std::is_same<Number, float>::value && n_lanes > 1) ?
-                           n_lanes / 2 :
-                           n_lanes)>;
+                        ((std::is_same<Number, float>::value &&
+                          VectorizedArrayType::size() > 1) ?
+                           VectorizedArrayType::size() / 2 :
+                           VectorizedArrayType::size())>;
 
       // Create a ShapeInfo object to provide the necessary interpolators to
       // the various quadrature points. Note that it is initialized with the