--- /dev/null	Sat May 10 12:09:16 2014
+++ new/usr/src/lib/libm/common/R/tanf.c	Sat May 10 12:09:16 2014
@@ -0,0 +1,159 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
+ */
+/*
+ * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma weak tanf = __tanf
+
+#include "libm.h"
+
+extern const int _TBL_ipio2_inf[];
+extern int __rem_pio2m(double *, double *, int, int, int, const int *);
+#if defined(__i386) && !defined(__amd64)
+extern int __swapRP(int);
+#endif
+
+static const double C[] = {
+	1.0,
+	4.46066928428959230679140546271810308098793029785e-0003,
+	4.92165316309189027066395283327437937259674072266e+0000,
+	-7.11410648161473480044492134766187518835067749023e-0001,
+	4.08549808374053391446523164631798863410949707031e+0000,
+	2.50411070398050927821032018982805311679840087891e+0000,
+	1.11492064560251158411574579076841473579406738281e+0001,
+	-1.50565540968422650891511693771462887525558471680e+0000,
+	-1.81484378878349295050043110677506774663925170898e+0000,
+	3.333335997532835641297409611782510896641e-0001,
+	2.999997598248363761541668282006867229939e+00,
+	0.636619772367581343075535,	/* 2^ -1  * 1.45F306DC9C883 */
+	0.5,
+	1.570796326734125614166,	/* 2^  0  * 1.921FB54400000 */
+	6.077100506506192601475e-11,	/* 2^-34  * 1.0B4611A626331 */
+};
+
+#define	one	C[0]
+#define	P0	C[1]
+#define	P1	C[2]
+#define	P2	C[3]
+#define	P3	C[4]
+#define	P4	C[5]
+#define	P5	C[6]
+#define	P6	C[7]
+#define	P7	C[8]
+#define	T0	C[9]
+#define	T1	C[10]
+#define	invpio2	C[11]
+#define	half	C[12]
+#define	pio2_1  C[13]
+#define	pio2_t	C[14]
+
+float
+tanf(float x)
+{
+	double	y, z, w;
+	float	f;
+	int	n, ix, hx, hy;
+	volatile int i;
+
+	hx = *((int *)&x);
+	ix = hx & 0x7fffffff;
+
+	y = (double)x;
+
+	if (ix <= 0x4016cbe4) {		/* |x| < 3*pi/4 */
+		if (ix <= 0x3f490fdb) {		/* |x| < pi/4 */
+			if (ix < 0x3c000000) {		/* |x| < 2**-7 */
+				if (ix <= 0x39800000) {	/* |x| < 2**-12 */
+					i = (int)y;
+#ifdef lint
+					i = i;
+#endif
+					return (x);
+				}
+				return ((float)((y * T0) * (T1 + y * y)));
+			}
+			z = y * y;
+			return ((float)(((P0 * y) * (P1 + z * (P2 + z)) *
+			    (P3 + z * (P4 + z))) *
+			    (P5 + z * (P6 + z * (P7 + z)))));
+		}
+		if (hx > 0)
+			y = (y - pio2_1) - pio2_t;
+		else
+			y = (y + pio2_1) + pio2_t;
+		hy = ((int *)&y)[HIWORD] & ~0x80000000;
+		if (hy < 0x3f800000) {		/* |y| < 2**-7 */
+			z = (y * T0) * (T1 + y * y);
+			return ((float)(-one / z));
+		}
+		z = y * y;
+		w = ((P0 * y) * (P1 + z * (P2 + z)) * (P3 + z * (P4 + z))) *
+		    (P5 + z * (P6 + z * (P7 + z)));
+		return ((float)(-one / w));
+	}
+
+	if (ix <= 0x49c90fdb) {	/* |x| < 2^19*pi */
+#if defined(__i386) && !defined(__amd64)
+		int	rp;
+
+		rp = __swapRP(fp_extended);
+#endif
+		w = y * invpio2;
+		if (hx < 0)
+			n = (int)(w - half);
+		else
+			n = (int)(w + half);
+		y = (y - n * pio2_1) - n * pio2_t;
+#if defined(__i386) && !defined(__amd64)
+		if (rp != fp_extended)
+			(void) __swapRP(rp);
+#endif
+	} else {
+		if (ix >= 0x7f800000)
+			return (x / x);	/* sin(Inf or NaN) is NaN */
+		hy = ((int *)&y)[HIWORD];
+		n = ((hy >> 20) & 0x7ff) - 1046;
+		((int *)&w)[HIWORD] = (hy & 0xfffff) | 0x41600000;
+		((int *)&w)[LOWORD] = ((int *)&y)[LOWORD];
+		n = __rem_pio2m(&w, &y, n, 1, 0, _TBL_ipio2_inf);
+		if (hy < 0) {
+			y = -y;
+			n = -n;
+		}
+	}
+
+	hy = ((int *)&y)[HIWORD] & ~0x80000000;
+	if (hy < 0x3f800000) {		/* |y| < 2**-7 */
+		z = (y * T0) * (T1 + y * y);
+		f = ((n & 1) == 0)? (float)z : (float)(-one / z);
+		return (f);
+	}
+	z = y * y;
+	w = ((P0 * y) * (P1 + z * (P2 + z)) * (P3 + z * (P4 + z))) *
+	    (P5 + z * (P6 + z * (P7 + z)));
+	f = ((n & 1) == 0)? (float)w : (float)(-one / w);
+	return (f);
+}
