From a8e64aa86ac8122725ed6501a31701930d472fd9 Mon Sep 17 00:00:00 2001
From: tma <tma@edf5b092-35ff-0310-97b2-ce42778d08ea>
Date: Thu, 19 Jan 2006 20:28:12 +0000
Subject: * Added Q_isnan for NaN tests with -ffast-math * Fixed UT/OpenAL work
 around

git-svn-id: svn://svn.icculus.org/quake3/trunk@510 edf5b092-35ff-0310-97b2-ce42778d08ea
---
 code/qcommon/q_math.c   | 20 ++++++++++++++++++++
 code/qcommon/q_shared.h |  1 +
 2 files changed, 21 insertions(+)

(limited to 'code/qcommon')

diff --git a/code/qcommon/q_math.c b/code/qcommon/q_math.c
index de90b8b..5ddd81f 100644
--- a/code/qcommon/q_math.c
+++ b/code/qcommon/q_math.c
@@ -1252,4 +1252,24 @@ void PerpendicularVector( vec3_t dst, const vec3_t src )
 	VectorNormalize( dst );
 }
 
+/*
+================
+Q_isnan
 
+Don't pass doubles to this
+================
+*/
+int Q_isnan( float x )
+{
+	union
+	{
+		float f;
+		unsigned int i;
+	} t;
+
+	t.f = x;
+	t.i &= 0x7FFFFFFF;
+	t.i = 0x7F800000 - t.i;
+
+	return (int)( (unsigned int)t.i >> 31 );
+}
diff --git a/code/qcommon/q_shared.h b/code/qcommon/q_shared.h
index a9388e7..e80074d 100644
--- a/code/qcommon/q_shared.h
+++ b/code/qcommon/q_shared.h
@@ -557,6 +557,7 @@ void MakeNormalVectors( const vec3_t forward, vec3_t right, vec3_t up );
 void MatrixMultiply(float in1[3][3], float in2[3][3], float out[3][3]);
 void AngleVectors( const vec3_t angles, vec3_t forward, vec3_t right, vec3_t up);
 void PerpendicularVector( vec3_t dst, const vec3_t src );
+int Q_isnan( float x );
 
 
 //=============================================
-- 
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