--- /dev/null	Sat May 10 12:08:58 2014
+++ new/usr/src/lib/libm/common/LD/__tanl.c	Sat May 10 12:08:58 2014
@@ -0,0 +1,171 @@
+/*
+ * 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 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/* INDENT OFF */
+/*
+ * __k_tanl( long double x;  long double y; int k )
+ * kernel tan/cotan function on [-pi/4, pi/4], pi/4 ~ 0.785398164
+ * Input x is assumed to be bounded by ~pi/4 in magnitude.
+ * Input y is the tail of x.
+ * Input k indicate -- tan if k=0; else -1/tan
+ *
+ * Table look up algorithm
+ *	1. by tan(-x) = -tan(x), need only to consider positive x
+ *	2. if x < 5/32 = [0x3ffc4000, 0] = 0.15625 , then
+ *	     if x < 2^-57 (hx < 0x3fc40000 0), set w=x with inexact if x!= 0
+ *	     else
+ *		z = x*x;
+ *		w = x + (y+(x*z)*(t1+z*(t2+z*(t3+z*(t4+z*(t5+z*t6))))))
+ *	   return (k == 0 ? w : 1/w);
+ *	3. else
+ *		ht = (hx + 0x400)&0x7ffff800	(round x to a break point t)
+ *		lt = 0
+ *		i  = (hy-0x3ffc4000)>>11;	(i<=64)
+ *		x' = (x - t)+y 			(|x'| ~<= 2^-7)
+ *	   By
+ *		tan(t+x')
+ *		  = (tan(t)+tan(x'))/(1-tan(x')tan(t))
+ *	   We have
+ *		             sin(x')+tan(t)*(tan(t)*sin(x'))
+ *		  = tan(t) + -------------------------------	for k=0
+ *			        cos(x') - tan(t)*sin(x')
+ *
+ *		             cos(x') - tan(t)*sin(x')
+ *		  = - --------------------------------------	for k=1
+ *		       tan(t) + tan(t)*(cos(x')-1) + sin(x')
+ *
+ *
+ *	   where 	tan(t) is from the table,
+ *			sin(x') = x + pp1*x^3 + ...+ pp5*x^11
+ *			cos(x') = 1 + qq1*x^2 + ...+ qq5*x^10
+ */
+
+#include "libm.h"
+
+#include <sys/isa_defs.h>
+
+extern const long double _TBL_tanl_hi[], _TBL_tanl_lo[];
+static const long double
+one	= 1.0,
+/*
+ * |sin(x) - (x+pp1*x^3+...+ pp5*x^11)| <= 2^-122.32 for |x|<1/64
+ */
+pp1	= -1.666666666666666666666666666586782940810e-0001L,
+pp2	=  8.333333333333333333333003723660929317540e-0003L,
+pp3	= -1.984126984126984076045903483778337804470e-0004L,
+pp4	=  2.755731922361906641319723106210900949413e-0006L,
+pp5	= -2.505198398570947019093998469135012057673e-0008L,
+/*
+ *                   2           10        -123.84
+ * |cos(x) - (1+qq1*x +...+ qq5*x  )| <= 2        for |x|<=1/128
+ */
+qq1	= -4.999999999999999999999999999999378373641e-0001L,
+qq2	=  4.166666666666666666666665478399327703130e-0002L,
+qq3	= -1.388888888888888888058211230618051613494e-0003L,
+qq4	=  2.480158730156105377771585658905303111866e-0005L,
+qq5	= -2.755728099762526325736488376695157008736e-0007L,
+/*
+ * |tan(x) - (x+t1*x^3+...+t6*x^13)|
+ * |------------------------------ | <= 2^-59.73 for |x|<0.15625
+ * |                x              |
+ */
+t1	=  3.333333333333333333333333333333423342490e-0001L,
+t2	=  1.333333333333333333333333333093838744537e-0001L,
+t3	=  5.396825396825396825396827906318682662250e-0002L,
+t4	=  2.186948853615520282185576976994418486911e-0002L,
+t5	=  8.863235529902196573354554519991152936246e-0003L,
+t6	=  3.592128036572480064652191427543994878790e-0003L,
+t7	=  1.455834387051455257856833807581901305474e-0003L,
+t8	=  5.900274409318599857829983256201725587477e-0004L,
+t9	=  2.391291152117265181501116961901122362937e-0004L,
+t10	=  9.691533169382729742394024173194981882375e-0005L,
+t11	=  3.927994733186415603228178184225780859951e-0005L,
+t12	=  1.588300018848323824227640064883334101288e-0005L,
+t13	=  6.916271223396808311166202285131722231723e-0006L;
+/* INDENT ON */
+long double
+__k_tanl(long double x, long double y, int k) {
+	long double a, t, z, w = 0.0, s, c;
+	int *pt = (int *) &t, *px = (int *) &x;
+	int i, j, hx, ix;
+
+	t = 1.0;
+#if defined(__i386) || defined(__amd64)
+	XTOI(px, hx);
+#else
+	hx = px[0];
+#endif
+	ix = hx & 0x7fffffff;
+	if (ix < 0x3ffc4000) {
+		if (ix < 0x3fc60000) {
+			if ((i = (int) x) == 0)	/* generate inexact */
+				w = x;
+		} else {
+			z = x * x;
+			if (ix < 0x3ff30000)	/* 2**-12 */
+				t = z * (t1 + z * (t2 + z * (t3 + z * t4)));
+			else
+				t = z * (t1 + z * (t2 + z * (t3 + z * (t4 +
+					z * (t5 + z * (t6 + z * (t7 + z *
+					(t8 + z * (t9 + z * (t10 + z * (t11 +
+					z * (t12 + z * t13))))))))))));
+			t = y + x * t;
+			w = x + t;
+		}
+		return (k == 0 ? w : -one / w);
+	}
+	j = (ix + 0x400) & 0x7ffff800;
+	i = (j - 0x3ffc4000) >> 11;
+#if defined(__i386) || defined(__amd64)
+	ITOX(j, pt);
+#else
+	pt[0] = j;
+#endif
+	if (hx > 0)
+		x = y - (t - x);
+	else
+		x = (-y) - (t + x);
+	a = _TBL_tanl_hi[i];
+	z = x * x;
+	/* cos(x)-1 */
+	t = z * (qq1 + z * (qq2 + z * (qq3 + z * (qq4 + z * qq5))));
+	/* sin(x) */
+	s = x * (one + z * (pp1 + z * (pp2 + z * (pp3 + z * (pp4 + z *
+		pp5)))));
+	if (k == 0) {
+		w = a * s;
+		t = _TBL_tanl_lo[i] + (s + a * w) / (one - (w - t));
+		return (hx < 0 ? -a - t : a + t);
+	} else {
+		w = s + a * t;
+		c = w + _TBL_tanl_lo[i];
+		z = (one - (a * s - t));
+		return (hx >= 0 ? z / (-a - c) : z / (a + c));
+	}
+}
