--- /dev/null	Sat May 10 12:09:30 2014
+++ new/usr/src/lib/libm/common/m9x/llroundl.c	Sat May 10 12:09:30 2014
@@ -0,0 +1,166 @@
+/*
+ * 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.
+ */
+
+#if defined(ELFOBJ)
+#pragma weak llroundl = __llroundl
+#if defined(__sparcv9) || defined(__amd64)
+#pragma weak lroundl = __llroundl
+#pragma weak __lroundl = __llroundl
+#endif
+#endif
+
+#include "libm.h"
+
+#if defined(__sparc)
+long long
+llroundl(long double x) {
+	union {
+		unsigned i[4];
+		long double q;
+	} xx;
+	union {
+		unsigned i[2];
+		long long l;
+	} zz;
+	union {
+		unsigned i;
+		float f;
+	} tt;
+	unsigned hx, sx, frac;
+	int j;
+
+	xx.q = x;
+	sx = xx.i[0] & 0x80000000;
+	hx = xx.i[0] & ~0x80000000;
+
+	/* handle trivial cases */
+	if (hx > 0x403e0000) { /* |x| > 2^63 + ... or x is nan */
+		/* convert an out-of-range float */
+		tt.i = sx | 0x7f000000;
+		return ((long long) tt.f);
+	}
+
+	/* handle |x| < 1 */
+	if (hx < 0x3fff0000) {
+		if (hx >= 0x3ffe0000)
+			return (sx ? -1LL : 1LL);
+		return (0LL);
+	}
+
+	/* extract the integer and fractional parts of x */
+	j = 0x406f - (hx >> 16);
+	xx.i[0] = 0x10000 | (xx.i[0] & 0xffff);
+	if (j >= 96) {
+		zz.i[0] = 0;
+		zz.i[1] = xx.i[0] >> (j - 96);
+		frac = ((xx.i[0] << 1) << (127 - j)) | (xx.i[1] >> (j - 96));
+		if (((xx.i[1] << 1) << (127 - j)) | xx.i[2] | xx.i[3])
+			frac |= 1;
+	} else if (j >= 64) {
+		zz.i[0] = xx.i[0] >> (j - 64);
+		zz.i[1] = ((xx.i[0] << 1) << (95 - j)) | (xx.i[1] >> (j - 64));
+		frac = ((xx.i[1] << 1) << (95 - j)) | (xx.i[2] >> (j - 64));
+		if (((xx.i[2] << 1) << (95 - j)) | xx.i[3])
+			frac |= 1;
+	} else {
+		zz.i[0] = ((xx.i[0] << 1) << (63 - j)) | (xx.i[1] >> (j - 32));
+		zz.i[1] = ((xx.i[1] << 1) << (63 - j)) | (xx.i[2] >> (j - 32));
+		frac = ((xx.i[2] << 1) << (63 - j)) | (xx.i[3] >> (j - 32));
+		if ((xx.i[3] << 1) << (63 - j))
+			frac |= 1;
+	}
+
+	/* round */
+	if (frac >= 0x80000000u) {
+		if (++zz.i[1] == 0)
+			zz.i[0]++;
+	}
+
+	/* check for result out of range (note that z is |x| at this point) */
+	if (zz.i[0] > 0x80000000u || (zz.i[0] == 0x80000000 && (zz.i[1] ||
+		!sx))) {
+		tt.i = sx | 0x7f000000;
+		return ((long long) tt.f);
+	}
+
+	/* negate result if need be */
+	if (sx) {
+		zz.i[0] = ~zz.i[0];
+		zz.i[1] = -zz.i[1];
+		if (zz.i[1] == 0)
+			zz.i[0]++;
+	}
+
+	return (zz.l);
+}
+#elif defined(__x86)
+long long
+llroundl(long double x) {
+	union {
+		unsigned i[3];
+		long double e;
+	} xx;
+	int ex, sx, i;
+
+	xx.e = x;
+	ex = xx.i[2] & 0x7fff;
+	sx = xx.i[2] & 0x8000;
+
+	if (ex < 0x403e) { /* |x| < 2^63 */
+		/* handle |x| < 1 */
+		if (ex < 0x3fff) {
+			if (ex >= 0x3ffe)
+				return (sx ? -1LL : 1LL);
+			return (0LL);
+		}
+
+		/* round x at the integer bit */
+		if (ex < 0x401e) {
+			i = 1 << (0x401d - ex);
+			xx.i[1] = (xx.i[1] + i) & ~(i | (i - 1));
+			xx.i[0] = 0;
+		} else {
+			i = 1 << (0x403d - ex);
+			xx.i[0] += i;
+			if (xx.i[0] < i)
+				xx.i[1]++;
+			xx.i[0] &= ~(i | (i - 1));
+		}
+		if (xx.i[1] == 0) {
+			xx.i[2] = sx | ++ex;
+			xx.i[1] = 0x80000000U;
+		}
+	}
+
+	/* now x is nan, inf, or integral */
+	return ((long long) xx.e);
+}
+#else
+#error Unknown architecture
+#endif
