Initial Contribution
diff --git a/libm/src/s_nexttoward.c b/libm/src/s_nexttoward.c
new file mode 100644
index 0000000..55da4ad
--- /dev/null
+++ b/libm/src/s_nexttoward.c
@@ -0,0 +1,73 @@
+/* @(#)s_nextafter.c 5.1 93/09/24 */
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+#ifndef lint
+static char rcsid[] = "$FreeBSD: src/lib/msun/src/s_nexttoward.c,v 1.1 2005/03/07 04:56:46 das Exp $";
+#endif
+
+/*
+ * We assume that a long double has a 15-bit exponent. On systems
+ * where long double is the same as double, nexttoward() is an alias
+ * for nextafter(), so we don't use this routine.
+ */
+
+#include <float.h>
+
+#include "fpmath.h"
+#include "math.h"
+#include "math_private.h"
+
+#if LDBL_MAX_EXP != 0x4000
+#error "Unsupported long double format"
+#endif
+
+double
+nexttoward(double x, long double y)
+{
+ union IEEEl2bits uy;
+ volatile double t;
+ int32_t hx,ix;
+ u_int32_t lx;
+
+ EXTRACT_WORDS(hx,lx,x);
+ ix = hx&0x7fffffff; /* |x| */
+ uy.e = y;
+
+ if(((ix>=0x7ff00000)&&((ix-0x7ff00000)|lx)!=0) ||
+ (uy.bits.exp == 0x7fff &&
+ ((uy.bits.manh&~LDBL_NBIT)|uy.bits.manl) != 0))
+ return x+y; /* x or y is nan */
+ if(x==y) return (double)y; /* x=y, return y */
+ if(x==0.0) {
+ INSERT_WORDS(x,uy.bits.sign<<31,1); /* return +-minsubnormal */
+ t = x*x;
+ if(t==x) return t; else return x; /* raise underflow flag */
+ }
+ if(hx>0.0 ^ x < y) { /* x -= ulp */
+ if(lx==0) hx -= 1;
+ lx -= 1;
+ } else { /* x += ulp */
+ lx += 1;
+ if(lx==0) hx += 1;
+ }
+ ix = hx&0x7ff00000;
+ if(ix>=0x7ff00000) return x+x; /* overflow */
+ if(ix<0x00100000) { /* underflow */
+ t = x*x;
+ if(t!=x) { /* raise underflow flag */
+ INSERT_WORDS(y,hx,lx);
+ return y;
+ }
+ }
+ INSERT_WORDS(x,hx,lx);
+ return x;
+}