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diff --git a/usr/src/lib/libm/common/complex/cpowl.c b/usr/src/lib/libm/common/complex/cpowl.c
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+/*
+ * 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 cpowl = __cpowl
+
+#include "libm.h" /* __k_clog_rl/__k_atan2l */
+/* atan2l/atan2pil/exp2l/expl/fabsl/hypotl/isinfl/logl/powl/sincosl/sincospil */
+#include "complex_wrapper.h"
+#include "longdouble.h"
+
+#if defined(__sparc)
+#define HALF(x) ((int *) &x)[3] = 0; ((int *) &x)[2] &= 0xfe000000
+#define LAST(x) ((int *) &x)[3]
+#elif defined(__x86)
+#define HALF(x) ((int *) &x)[0] = 0
+#define LAST(x) ((int *) &x)[0]
+#endif
+
+/* INDENT OFF */
+static const int hiinf = 0x7fff0000;
+static const long double
+ tiny = 1.0e-4000L,
+ huge = 1.0e4000L,
+#if defined(__x86)
+ /* 43 significant bits, 21 trailing zeros */
+ ln2hil = 0.693147180559890330187045037746429443359375L,
+ ln2lol = 5.497923018708371174712471612513436025525412068e-14L,
+#else /* sparc */
+ /* 0x3FF962E4 2FEFA39E F35793C7 00000000 */
+ ln2hil = 0.693147180559945309417231592858066493070671489074L,
+ ln2lol = 5.28600110075004828645286235820646730106802446566153e-25L,
+#endif
+ invln2 = 1.442695040888963407359924681001892137427e+0000L,
+ one = 1.0L,
+ zero = 0.0L;
+/* INDENT ON */
+
+/*
+ * Assuming |t[0]| > |t[1]| and |t[2]| > |t[3]|, sum4fpl subroutine
+ * compute t[0] + t[1] + t[2] + t[3] into two long double fp numbers.
+ */
+static long double sum4fpl(long double ta[], long double *w)
+{
+ long double t1, t2, t3, t4, w1, w2, t;
+ t1 = ta[0]; t2 = ta[1]; t3 = ta[2]; t4 = ta[3];
+ /*
+ * Rearrange ti so that |t1| >= |t2| >= |t3| >= |t4|
+ */
+ if (fabsl(t4) > fabsl(t1)) {
+ t = t1; t1 = t3; t3 = t;
+ t = t2; t2 = t4; t4 = t;
+ } else if (fabsl(t3) > fabsl(t1)) {
+ t = t1; t1 = t3;
+ if (fabsl(t4) > fabsl(t2)) {
+ t3 = t4; t4 = t2; t2 = t;
+ } else {
+ t3 = t2; t2 = t;
+ }
+ } else if (fabsl(t3) > fabsl(t2)) {
+ t = t2; t2 = t3;
+ if (fabsl(t4) > fabsl(t2)) {
+ t3 = t4; t4 = t;
+ } else
+ t3 = t;
+ }
+ /* summing r = t1 + t2 + t3 + t4 to w1 + w2 */
+ w1 = t3 + t4;
+ w2 = t4 - (w1 - t3);
+ t = t2 + w1;
+ w2 += w1 - (t - t2);
+ w1 = t + w2;
+ w2 += t - w1;
+ t = t1 + w1;
+ w2 += w1 - (t - t1);
+ w1 = t + w2;
+ *w = w2 - (w1 - t);
+ return (w1);
+}
+
+ldcomplex
+cpowl(ldcomplex z, ldcomplex w) {
+ ldcomplex ans;
+ long double x, y, u, v, t, c, s, r;
+ long double t1, t2, t3, t4, x1, x2, y1, y2, u1, v1, b[4], w1, w2;
+ int ix, iy, hx, hy, hv, hu, iu, iv, i, j, k;
+
+ x = LD_RE(z);
+ y = LD_IM(z);
+ u = LD_RE(w);
+ v = LD_IM(w);
+ hx = HI_XWORD(x);
+ hy = HI_XWORD(y);
+ hu = HI_XWORD(u);
+ hv = HI_XWORD(v);
+ ix = hx & 0x7fffffff;
+ iy = hy & 0x7fffffff;
+ iu = hu & 0x7fffffff;
+ iv = hv & 0x7fffffff;
+
+ j = 0;
+ if (v == zero) { /* z**(real) */
+ if (u == one) { /* (anything) ** 1 is itself */
+ LD_RE(ans) = x;
+ LD_IM(ans) = y;
+ } else if (u == zero) { /* (anything) ** 0 is 1 */
+ LD_RE(ans) = one;
+ LD_IM(ans) = zero;
+ } else if (y == zero) { /* real ** real */
+ LD_IM(ans) = zero;
+ if (hx < 0 && ix < hiinf && iu < hiinf) {
+ /* -x ** u is exp(i*pi*u)*pow(x,u) */
+ r = powl(-x, u);
+ sincospil(u, &s, &c);
+ LD_RE(ans) = (c == zero)? c: c * r;
+ LD_IM(ans) = (s == zero)? s: s * r;
+ } else
+ LD_RE(ans) = powl(x, u);
+ } else if (x == zero || ix >= hiinf || iy >= hiinf) {
+ if (isnanl(x) || isnanl(y) || isnanl(u))
+ LD_RE(ans) = LD_IM(ans) = x + y + u;
+ else {
+ if (x == zero)
+ r = fabsl(y);
+ else
+ r = fabsl(x) + fabsl(y);
+ t = atan2pil(y, x);
+ sincospil(t * u, &s, &c);
+ LD_RE(ans) = (c == zero)? c: c * r;
+ LD_IM(ans) = (s == zero)? s: s * r;
+ }
+ } else if (fabsl(x) == fabsl(y)) { /* |x| = |y| */
+ if (hx >= 0) {
+ t = (hy >= 0)? 0.25L : -0.25L;
+ sincospil(t * u, &s, &c);
+ } else if ((LAST(u) & 3) == 0) {
+ t = (hy >= 0)? 0.75L : -0.75L;
+ sincospil(t * u, &s, &c);
+ } else {
+ r = (hy >= 0)? u : -u;
+ t = -0.25L * r;
+ w1 = r + t;
+ w2 = t - (w1 - r);
+ sincospil(w1, &t1, &t2);
+ sincospil(w2, &t3, &t4);
+ s = t1 * t4 + t3 * t2;
+ c = t2 * t4 - t1 * t3;
+ }
+ if (ix < 0x3ffe0000) /* |x| < 1/2 */
+ r = powl(fabsl(x + x), u) * exp2l(-0.5L * u);
+ else if (ix >= 0x3fff0000 || iu < 0x400cfff8)
+ /* |x| >= 1 or |u| < 16383 */
+ r = powl(fabsl(x), u) * exp2l(0.5L * u);
+ else /* special treatment */
+ j = 2;
+ if (j == 0) {
+ LD_RE(ans) = (c == zero)? c: c * r;
+ LD_IM(ans) = (s == zero)? s: s * r;
+ }
+ } else
+ j = 1;
+ if (j == 0)
+ return (ans);
+ }
+ if (iu >= hiinf || iv >= hiinf || ix >= hiinf || iy >= hiinf) {
+ /*
+ * non-zero imag part(s) with inf component(s) yields NaN
+ */
+ t = fabsl(x) + fabsl(y) + fabsl(u) + fabsl(v);
+ LD_RE(ans) = LD_IM(ans) = t - t;
+ } else {
+ k = 0; /* no scaling */
+ if (iu > 0x7ffe0000 || iv > 0x7ffe0000) {
+ u *= 1.52587890625000000000e-05L;
+ v *= 1.52587890625000000000e-05L;
+ k = 1; /* scale u and v by 2**-16 */
+ }
+ /*
+ * Use similated higher precision arithmetic to compute:
+ * r = u * log(hypot(x, y)) - v * atan2(y, x)
+ * q = u * atan2(y, x) + v * log(hypot(x, y))
+ */
+
+ t1 = __k_clog_rl(x, y, &t2);
+ t3 = __k_atan2l(y, x, &t4);
+ x1 = t1; HALF(x1);
+ y1 = t3; HALF(y1);
+ u1 = u; HALF(u1);
+ v1 = v; HALF(v1);
+ x2 = t2 - (x1 - t1); /* log(hypot(x,y)) = x1 + x2 */
+ y2 = t4 - (y1 - t3); /* atan2(y,x) = y1 + y2 */
+ /* compute q = u * atan2(y, x) + v * log(hypot(x, y)) */
+ if (j != 2) {
+ b[0] = u1 * y1;
+ b[1] = (u - u1) * y1 + u * y2;
+ if (j == 1) { /* v = 0 */
+ w1 = b[0] + b[1];
+ w2 = b[1] - (w1 - b[0]);
+ } else {
+ b[2] = v1 * x1;
+ b[3] = (v - v1) * x1 + v * x2;
+ w1 = sum4fpl(b, &w2);
+ }
+ sincosl(w1, &t1, &t2);
+ sincosl(w2, &t3, &t4);
+ s = t1 * t4 + t3 * t2;
+ c = t2 * t4 - t1 * t3;
+ if (k == 1) /* square j times */
+ for (i = 0; i < 10; i++) {
+ t1 = s * c;
+ c = (c + s) * (c - s);
+ s = t1 + t1;
+ }
+ }
+ /* compute r = u * (t1, t2) - v * (t3, t4) */
+ b[0] = u1 * x1;
+ b[1] = (u - u1) * x1 + u * x2;
+ if (j == 1) { /* v = 0 */
+ w1 = b[0] + b[1];
+ w2 = b[1] - (w1 - b[0]);
+ } else {
+ b[2] = -v1 * y1;
+ b[3] = (v1 - v) * y1 - v * y2;
+ w1 = sum4fpl(b, &w2);
+ }
+ /* scale back unless w1 is large enough to cause exception */
+ if (k != 0 && fabsl(w1) < 20000.0L) {
+ w1 *= 65536.0L; w2 *= 65536.0L;
+ }
+ hx = HI_XWORD(w1);
+ ix = hx & 0x7fffffff;
+ /* compute exp(w1 + w2) */
+ k = 0;
+ if (ix < 0x3f8c0000) /* exp(tiny < 2**-115) = 1 */
+ r = one;
+ else if (ix >= 0x400c6760) /* overflow/underflow */
+ r = (hx < 0)? tiny * tiny : huge * huge;
+ else { /* compute exp(w1 + w2) */
+ k = (int) (invln2 * w1 + ((hx >= 0)? 0.5L : -0.5L));
+ t1 = (long double) k;
+ t2 = w1 - t1 * ln2hil;
+ t3 = w2 - t1 * ln2lol;
+ r = expl(t2 + t3);
+ }
+ if (c != zero) c *= r;
+ if (s != zero) s *= r;
+ if (k != 0) {
+ c = scalbnl(c, k);
+ s = scalbnl(s, k);
+ }
+ LD_RE(ans) = c;
+ LD_IM(ans) = s;
+ }
+ return (ans);
+}
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