From b3b9d7a14c1944f8ce8085cdb631970142020249 Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Mon, 16 Nov 2015 13:33:54 +0100
Subject: [PATCH] Workaround i387 issue in unit test (grafted from
 a64156cae5e4fc72a783a14584f1140c5a68a3b3 )

---
 test/ref.cpp | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/test/ref.cpp b/test/ref.cpp
index 44bbd3bf1..8297e263a 100644
--- a/test/ref.cpp
+++ b/test/ref.cpp
@@ -34,6 +34,18 @@ inline void on_temporary_creation(int) {
 
 // test Ref.h
 
+// Deal with i387 extended precision
+#if EIGEN_ARCH_i386 && !(EIGEN_ARCH_x86_64)
+
+#if EIGEN_COMP_GNUC_STRICT && EIGEN_GNUC_AT_LEAST(4,4)
+#pragma GCC optimize ("-ffloat-store")
+#else
+#undef VERIFY_IS_EQUAL
+#define VERIFY_IS_EQUAL(X,Y) VERIFY_IS_APPROX(X,Y)
+#endif
+
+#endif
+
 template<typename MatrixType> void ref_matrix(const MatrixType& m)
 {
   typedef typename MatrixType::Index Index;
@@ -71,7 +83,6 @@ template<typename MatrixType> void ref_matrix(const MatrixType& m)
   rm2 = m2.block(i,j,brows,bcols);
   VERIFY_IS_EQUAL(m1, m2);
   
-  
   ConstRefDynMat rm3 = m1.block(i,j,brows,bcols);
   m1.block(i,j,brows,bcols) *= 2;
   m2.block(i,j,brows,bcols) *= 2;