1 files changed, 22 insertions, 0 deletions
diff --git a/src/qcommon/q_math.c b/src/qcommon/q_math.c
index bf209562..196d2f55 100644
--- a/src/qcommon/q_math.c
+++ b/src/qcommon/q_math.c
@@ -1538,3 +1538,25 @@ vec_t DistanceBetweenLineSegments(
   return (vec_t)sqrt( DistanceBetweenLineSegmentsSquared(
         sP0, sP1, tP0, tP1, s, t ) );
 }
+
+/*
+=================
+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 );
+}