From ffc866159fcdf23bc38ce00e9af84cd80fed26e9 Mon Sep 17 00:00:00 2001
From: chengduo <zhaochengduo@baidu.com>
Date: Wed, 7 Nov 2018 14:50:10 +0800
Subject: [PATCH] hot fix log (#14293)

test=develop
---
 paddle/fluid/operators/math/cross_entropy.cu | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/paddle/fluid/operators/math/cross_entropy.cu b/paddle/fluid/operators/math/cross_entropy.cu
index a651e0265a0..cb200ec8d6e 100644
--- a/paddle/fluid/operators/math/cross_entropy.cu
+++ b/paddle/fluid/operators/math/cross_entropy.cu
@@ -28,7 +28,7 @@ __device__ __forceinline__ double real_log(double x) { return log(x); }
 
 __device__ __forceinline__ platform::float16 real_log(
     const platform::float16& val) {
-  return static_cast<platform::float16>(hlog(static_cast<half>(val)));
+  return static_cast<platform::float16>(logf(static_cast<float>(val)));
 }
 
 template <typename T>
-- 
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