From d7a0e52478e6f769ce2df51f009d0b3ca535b80b Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Fri, 22 Jul 2016 15:44:26 +0200
Subject: [PATCH] Fix testing of log nearby 1

---
 unsupported/test/cxx11_tensor_of_float16_cuda.cu | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/unsupported/test/cxx11_tensor_of_float16_cuda.cu b/unsupported/test/cxx11_tensor_of_float16_cuda.cu
index fe2e58929..b6df5a4d2 100644
--- a/unsupported/test/cxx11_tensor_of_float16_cuda.cu
+++ b/unsupported/test/cxx11_tensor_of_float16_cuda.cu
@@ -188,7 +188,10 @@ void test_cuda_trancendental() {
   }
   for (int i = 0; i < num_elem; ++i) {
     std::cout << "Checking elemwise log " << i << " input = " << input2(i) << " full = " << full_prec2(i) << " half = " << half_prec2(i) << std::endl;
-    VERIFY_IS_APPROX(full_prec2(i), half_prec2(i));
+    if(std::abs(input2(i)-1.f)<0.05f) // log lacks accurary nearby 1
+      VERIFY_IS_APPROX(full_prec2(i)+Eigen::half(0.1f), half_prec2(i)+Eigen::half(0.1f));
+    else
+      VERIFY_IS_APPROX(full_prec2(i), half_prec2(i));
   }
   gpu_device.deallocate(d_float1);
   gpu_device.deallocate(d_float2);