From 8c4ea6ebb26c55f21e04389741453bda05d372e0 Mon Sep 17 00:00:00 2001
From: Christophe Riccio <mail@g-truc.net>
Date: Thu, 20 Sep 2012 12:28:12 +0200
Subject: [PATCH] Fixed isnan on GCC

---
 glm/core/func_common.hpp |  2 ++
 glm/core/func_common.inl | 13 +++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/glm/core/func_common.hpp b/glm/core/func_common.hpp
index 3c268190..9caa3e75 100644
--- a/glm/core/func_common.hpp
+++ b/glm/core/func_common.hpp
@@ -303,6 +303,8 @@ namespace glm
 	/// floating point representations. Returns false otherwise,
 	/// including for implementations with no NaN
 	/// representations.
+	/// 
+	/// /!\ When using compiler fast math, this function may fail.
     /// 
 	/// @tparam genType Floating-point scalar or vector types.
 	///
diff --git a/glm/core/func_common.inl b/glm/core/func_common.inl
index b3b3839f..5b59cd50 100644
--- a/glm/core/func_common.inl
+++ b/glm/core/func_common.inl
@@ -864,6 +864,18 @@ namespace detail
 	{
 		GLM_STATIC_ASSERT(detail::type<genType>::is_float, "'isinf' only accept floating-point inputs");
 
+#       if(GLM_COMPILER & (GLM_COMPILER_INTEL | GLM_COMPILER_VC))
+            return _fpclass(x) == _FPCLASS_NINF || _fpclass(x) == _FPCLASS_PINF;
+#		elif(GLM_COMPILER & GLM_COMPILER_GCC)
+#			if(GLM_PLATFORM & GLM_PLATFORM_ANDROID)
+				return _isinf(x) != 0;
+#			else
+				return std::isinf(x);
+#			endif
+#       else
+            return std::isinf(x);
+#       endif
+/*
 #       if(GLM_COMPILER & GLM_COMPILER_VC)
             return _fpclass(x) == _FPCLASS_NINF || _fpclass(x) == _FPCLASS_PINF;
 #       elif(GLM_COMPILER & GLM_COMPILER_GCC)
@@ -877,6 +889,7 @@ namespace detail
 #       else
             return std::isinf(x);
 #       endif
+*/
 	}
 
     template <typename T>