Initial Contribution
diff --git a/libm/fpclassify.c b/libm/fpclassify.c
new file mode 100644
index 0000000..baf116c
--- /dev/null
+++ b/libm/fpclassify.c
@@ -0,0 +1,94 @@
+/*-
+ * Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
+ * Copyright (c) 2002, 2003 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/libc/gen/fpclassify.c,v 1.2 2005/02/06 03:23:31 das Exp $
+ */
+
+#include <sys/endian.h>
+
+#include <math.h>
+#include <stdint.h>
+
+#include "src/fpmath.h"
+
+int
+__fpclassifyf(float f)
+{
+ union IEEEf2bits u;
+
+ u.f = f;
+ if (u.bits.exp == 0) {
+ if (u.bits.man == 0)
+ return (FP_ZERO);
+ return (FP_SUBNORMAL);
+ }
+ if (u.bits.exp == 255) {
+ if (u.bits.man == 0)
+ return (FP_INFINITE);
+ return (FP_NAN);
+ }
+ return (FP_NORMAL);
+}
+
+int
+__fpclassifyd(double d)
+{
+ union IEEEd2bits u;
+
+ u.d = d;
+ if (u.bits.exp == 0) {
+ if ((u.bits.manl | u.bits.manh) == 0)
+ return (FP_ZERO);
+ return (FP_SUBNORMAL);
+ }
+ if (u.bits.exp == 2047) {
+ if ((u.bits.manl | u.bits.manh) == 0)
+ return (FP_INFINITE);
+ return (FP_NAN);
+ }
+ return (FP_NORMAL);
+}
+
+int
+__fpclassifyl(long double e)
+{
+ union IEEEl2bits u;
+
+ u.e = e;
+ if (u.bits.exp == 0) {
+ if ((u.bits.manl | u.bits.manh) == 0)
+ return (FP_ZERO);
+ return (FP_SUBNORMAL);
+ }
+ mask_nbit_l(u); /* Mask normalization bit if applicable. */
+ if (u.bits.exp == 32767) {
+ if ((u.bits.manl | u.bits.manh) == 0)
+ return (FP_INFINITE);
+ return (FP_NAN);
+ }
+ return (FP_NORMAL);
+}
+