From 64bf3df0f97c1d69f1b99f6e4a1a0e6d4059acba Mon Sep 17 00:00:00 2001
From: Kexin Zhao <kexin.zhao.paddle@gmail.com>
Date: Mon, 16 Apr 2018 19:31:51 -0700
Subject: [PATCH] add print support to float16 (#9960)

---
 paddle/fluid/platform/float16.h       | 5 +++++
 paddle/fluid/platform/float16_test.cc | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/paddle/fluid/platform/float16.h b/paddle/fluid/platform/float16.h
index 673e1bcae..ffd183af6 100644
--- a/paddle/fluid/platform/float16.h
+++ b/paddle/fluid/platform/float16.h
@@ -873,6 +873,11 @@ HOSTDEVICE inline bool(isfinite)(const float16& a) {
   return !((isnan)(a)) && !((isinf)(a));
 }
 
+inline std::ostream& operator<<(std::ostream& os, const float16& a) {
+  os << static_cast<float>(a);
+  return os;
+}
+
 }  // namespace platform
 }  // namespace paddle
 
diff --git a/paddle/fluid/platform/float16_test.cc b/paddle/fluid/platform/float16_test.cc
index d60aecf96..a589e32b6 100644
--- a/paddle/fluid/platform/float16_test.cc
+++ b/paddle/fluid/platform/float16_test.cc
@@ -141,5 +141,10 @@ TEST(float16, lod_tensor_cpu) {
   }
 }
 
+TEST(float16, print) {
+  float16 a = float16(1.0f);
+  std::cout << a << std::endl;
+}
+
 }  // namespace platform
 }  // namespace paddle
-- 
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