support_cuda9_windows.patch

diff --git a/Eigen/src/Core/arch/CUDA/Half.h b/Eigen/src/Core/arch/CUDA/Half.h
index bfda39d..d28858a 100644
--- a/Eigen/src/Core/arch/CUDA/Half.h
+++ b/Eigen/src/Core/arch/CUDA/Half.h
@@ -155,7 +155,11 @@ namespace half_impl {
 // conversion steps back and forth.
 
 EIGEN_STRONG_INLINE __device__ half operator + (const half& a, const half& b) {
+#if defined(EIGEN_CUDACC_VER) && EIGEN_CUDACC_VER >= 90000
+  return __hadd(::__half(a), ::__half(b));
+#else
   return __hadd(a, b);
+#endif
 }
 EIGEN_STRONG_INLINE __device__ half operator * (const half& a, const half& b) {
   return __hmul(a, b);
@@ -164,9 +168,13 @@ EIGEN_STRONG_INLINE __device__ half operator - (const half& a, const half& b) {
   return __hsub(a, b);
 }
 EIGEN_STRONG_INLINE __device__ half operator / (const half& a, const half& b) {
+#if defined(EIGEN_CUDACC_VER) && EIGEN_CUDACC_VER >= 90000
+  return __hdiv(a, b);
+#else
   float num = __half2float(a);
   float denom = __half2float(b);
   return __float2half(num / denom);
+#endif
 }
 EIGEN_STRONG_INLINE __device__ half operator - (const half& a) {
   return __hneg(a);