CMake: Introduce forced failure for SSE2 vectorisation configuration.

jppelteret · Jun 15, 2022 · 55db357 · 55db357
1 parent 7947187
commit 55db357
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/cmake/checks/check_02_compiler_features.cmake b/cmake/checks/check_02_compiler_features.cmake
@@ -154,6 +154,11 @@ WF_CHECK_CXX_SOURCE_RUNS(
     do_test<double, 2>();
     do_test<float, 4>();
   #endif
+    
+    // All indications are that _mm_sqrt_pd() sporadically segfaults with zero input vector.
+  #if DEAL_II_VECTORIZATION_WIDTH_IN_BITS == 128
+    static_assert(false, 'Problematic vectorization width detected.');
+  #endif
 
     do_test<double, 1>();
     do_test<float, 1>();