--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/genericopenlibs/openenvcore/libm/src/s_isnan.c	Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,61 @@
+/*--------------------------------------------------------------------
+ *© Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.
+ *--------------------------------------------------------------------
+*/
+/*-
+ * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD: src/lib/msun/src/s_isnan.c,v 1.8 2004/08/05 01:46:11 das Exp $
+ */
+
+#include <math.h>
+
+#include "fpmath.h"
+
+EXPORT_C int __isnan(double d)
+{
+	union IEEEd2bits u;
+
+	u.d = d;
+	return (u.bits.exp == 2047 && (u.bits.manl != 0 || u.bits.manh != 0));
+}
+
+EXPORT_C int __isnanf(float f)
+{
+	union IEEEf2bits u;
+
+	u.f = f;
+	return (u.bits.exp == 255 && u.bits.man != 0);
+}
+
+
+EXPORT_C int __isnanl(long double e)
+{
+	union IEEEl2bits u;
+
+	u.e = e;
+	mask_nbit_l(u);
+	return (u.bits.exp == 32767 && (u.bits.manl != 0 || u.bits.manh != 0));
+}