1 files changed, 9 insertions, 0 deletions
diff --git a/Eigen/src/Core/MathFunctions.h b/Eigen/src/Core/MathFunctions.h
index 5771abf7d..2bdf7dde7 100644
--- a/Eigen/src/Core/MathFunctions.h
+++ b/Eigen/src/Core/MathFunctions.h
@@ -937,6 +937,15 @@ template<typename T> EIGEN_DEVICE_FUNC bool (isnan)   (const T &x) { return inte
 template<typename T> EIGEN_DEVICE_FUNC bool (isinf)   (const T &x) { return internal::isinf_impl(x); }
 template<typename T> EIGEN_DEVICE_FUNC bool (isfinite)(const T &x) { return internal::isfinite_impl(x); }
 
+template<typename T> EIGEN_DEVICE_FUNC int (fpclassify)(const T& x){
+  #ifdef __CUDA_ARCH__
+    return (::fpclassify)(x);
+  #else
+    using std::fpclassify;
+    return fpclassify(x);
+  #endif
+}
+
 template<typename Scalar>
 EIGEN_DEVICE_FUNC
 inline EIGEN_MATHFUNC_RETVAL(round, Scalar) round(const Scalar& x)