--- /dev/null	Sat May 10 12:08:56 2014
+++ new/usr/src/lib/libm/common/C/sincospi.c	Sat May 10 12:08:56 2014
@@ -0,0 +1,191 @@
+/*
+ * 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.
+ */
+
+#pragma weak sincospi = __sincospi
+
+/* INDENT OFF */
+/*
+ * void sincospi(double x, double *s, double *c)
+ * *s = sin(pi*x); *c = cos(pi*x);
+ *
+ * Algorithm, 10/17/2002, K.C. Ng
+ * ------------------------------
+ * Let y = |4x|, z = floor(y), and n = (int)(z mod 8.0) (displayed in binary).
+ *	1. If y==z, then x is a multiple of pi/4. Return the following values:
+ *             ---------------------------------------------------
+ *               n  x mod 2    sin(x*pi)    cos(x*pi)   tan(x*pi)
+ *             ---------------------------------------------------
+ *              000  0.00       +0 ___       +1 ___      +0
+ *              001  0.25       +\/0.5       +\/0.5      +1
+ *              010  0.50       +1 ___       +0 ___      +inf
+ *              011  0.75       +\/0.5       -\/0.5      -1
+ *              100  1.00       -0 ___       -1 ___      +0
+ *              101  1.25       -\/0.5       -\/0.5      +1
+ *              110  1.50       -1 ___       -0 ___      +inf
+ *              111  1.75       -\/0.5       +\/0.5      -1
+ *             ---------------------------------------------------
+ *      2. Otherwise,
+ *             ---------------------------------------------------
+ *               n     t        sin(x*pi)    cos(x*pi)   tan(x*pi)
+ *             ---------------------------------------------------
+ *              000  (y-z)/4	 sinpi(t)     cospi(t)    tanpi(t)
+ *              001  (z+1-y)/4   cospi(t)     sinpi(t)	  1/tanpi(t)
+ *              010  (y-z)/4	 cospi(t)    -sinpi(t)   -1/tanpi(t)
+ *              011  (z+1-y)/4	 sinpi(t)    -cospi(t)	 -tanpi(t)
+ *              100  (y-z)/4	-sinpi(t)    -cospi(t)    tanpi(t)
+ *              101  (z+1-y)/4	-cospi(t)    -sinpi(t)	  1/tanpi(t)
+ *              110  (y-z)/4	-cospi(t)     sinpi(t)	 -1/tanpi(t)
+ *              111  (z+1-y)/4	-sinpi(t)     cospi(t)	 -tanpi(t)
+ *             ---------------------------------------------------
+ *
+ * NOTE. This program compute sinpi/cospi(t<0.25) by __k_sin/cos(pi*t, 0.0).
+ * This will return a result with error slightly more than one ulp (but less
+ * than 2 ulp). If one wants accurate result,  one may break up pi*t in
+ * high (tpi_h) and low (tpi_l) parts and call __k_sin/cos(tip_h, tip_lo)
+ * instead.
+ */
+
+#include "libm.h"
+#include "libm_synonyms.h"
+#include "libm_protos.h"
+#include "libm_macros.h"
+#include <math.h>
+#if defined(__SUNPRO_C)
+#include <sunmath.h>
+#endif
+
+static const double
+	pi 	= 3.14159265358979323846,	/* 400921FB,54442D18 */
+	sqrth_h = 0.70710678118654757273731092936941422522068023681640625,
+	sqrth_l = -4.8336466567264565185935844299127932213411660131004e-17;
+/* INDENT ON */
+
+void
+sincospi(double x, double *s, double *c) {
+	double y, z, t;
+	int n, ix, k;
+	int hx = ((int *) &x)[HIWORD];
+	unsigned h, lx = ((unsigned *) &x)[LOWORD];
+
+	ix = hx & ~0x80000000;
+	n = (ix >> 20) - 0x3ff;
+	if (n >= 51) {			/* |x| >= 2**51 */
+		if (n >= 1024)
+#if defined(FPADD_TRAPS_INCOMPLETE_ON_NAN)
+			*s = *c = ix >= 0x7ff80000 ? x : x - x;
+			/* assumes sparc-like QNaN */
+#else
+			*s = *c = x - x;
+#endif
+		else {
+			if (n >= 53)  {
+				*s = 0.0;
+				*c = 1.0;
+			}
+			else if (n == 52)  {
+				if ((lx & 1) == 0) {
+					*s = 0.0;
+					*c = 1.0;
+				}
+				else {
+					*s = -0.0;
+					*c = -1.0;
+				}
+			}
+			else {	/* n == 51 */
+				if ((lx & 1) == 0) {
+					*s = 0.0;
+					*c = 1.0;
+				}
+				else {
+					*s = 1.0;
+					*c = 0.0;
+				}
+				if ((lx & 2) != 0) {
+					*s = -*s;
+					*c = -*c;
+				}
+			}
+		}
+	}
+	else if (n < -2) 	/* |x| < 0.25 */
+		*s = __k_sincos(pi * fabs(x), 0.0, c);
+	else {
+		/* y = |4x|, z = floor(y), and n = (int)(z mod 8.0) */
+		if (ix < 0x41C00000) {		/* |x| < 2**29 */
+			y = 4.0 * fabs(x);
+			n = (int) y;		/* exact */
+			z = (double) n;
+			k = z == y;
+			t = (y - z) * 0.25;
+		}
+		else {				/* 2**29 <= |x| < 2**51 */
+			y = fabs(x);
+			k = 50 - n;
+			n = lx >> k;
+			h = n << k;
+			((unsigned *) &z)[LOWORD] = h;
+			((int *) &z)[HIWORD] = ix;
+			k = h == lx;
+			t = y - z;
+		}
+		if (k) {			/* x = N/4 */
+			if ((n & 1) != 0)
+				*s = *c = sqrth_h + sqrth_l;
+			else
+				if ((n & 2) == 0) {
+					*s = 0.0;
+					*c = 1.0;
+				}
+				else {
+					*s = 1.0;
+					*c = 0.0;
+				}
+				y = (n & 2) == 0 ? 0.0 : 1.0;
+				if ((n & 4) != 0)
+					*s = -*s;
+				if (((n + 1) & 4) != 0)
+					*c = -*c;
+		}
+		else {
+			if ((n & 1) != 0)
+				t = 0.25 - t;
+			if (((n + (n & 1)) & 2) == 0)
+				*s = __k_sincos(pi * t, 0.0, c);
+			else
+				*c = __k_sincos(pi * t, 0.0, s);
+				if ((n & 4) != 0)
+					*s = -*s;
+				if (((n + 2) & 4) != 0)
+					*c = -*c;
+		}
+	}
+	if (hx < 0)
+		*s = -*s;
+}
