--- /dev/null	Sat May 10 12:09:32 2014
+++ new/usr/src/lib/libm/common/m9x/remquo.c	Sat May 10 12:09:32 2014
@@ -0,0 +1,267 @@
+/*
+ * 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 remquo = __remquo
+
+/* INDENT OFF */
+/*
+ * double remquo(double x, double y, int *quo) return remainder(x,y) and an
+ * integer pointer quo such that *quo = N mod {2**31}, where N is the
+ * exact integral part of x/y rounded to nearest even.
+ *
+ * remquo call internal fmodquo
+ */
+/* INDENT ON */
+
+#include "libm.h"
+#include "libm_synonyms.h"
+#include "libm_protos.h"
+#include <math.h>		/* fabs() */
+#include <sys/isa_defs.h>
+
+#if defined(_BIG_ENDIAN)
+#define	HIWORD	0
+#define	LOWORD	1
+#else
+#define	HIWORD	1
+#define	LOWORD	0
+#endif
+#define	__HI(x)	((int *) &x)[HIWORD]
+#define	__LO(x)	((int *) &x)[LOWORD]
+
+static const double one = 1.0, Zero[] = {0.0, -0.0};
+
+static double
+fmodquo(double x, double y, int *quo) {
+	int n, hx, hy, hz, ix, iy, sx, sq, i, m;
+	unsigned lx, ly, lz;
+
+	hx = __HI(x);		/* high word of x */
+	lx = __LO(x);		/* low  word of x */
+	hy = __HI(y);		/* high word of y */
+	ly = __LO(y);		/* low  word of y */
+	sx = hx & 0x80000000;	/* sign of x */
+	sq = (hx ^ hy) & 0x80000000;	/* sign of x/y */
+	hx ^= sx;		/* |x| */
+	hy &= 0x7fffffff;	/* |y| */
+
+	/* purge off exception values */
+	*quo = 0;
+	if ((hy | ly) == 0 || hx >= 0x7ff00000 ||	/* y=0, or x !finite */
+	    (hy | ((ly | -ly) >> 31)) > 0x7ff00000)	/* or y is NaN */
+		return ((x * y) / (x * y));
+	if (hx <= hy) {
+		if (hx < hy || lx < ly)
+			return (x);	/* |x|<|y| return x */
+		if (lx == ly) {
+			*quo = 1 + (sq >> 30);
+			/* |x|=|y| return x*0 */
+			return (Zero[(unsigned) sx >> 31]);
+		}
+	}
+
+	/* determine ix = ilogb(x) */
+	if (hx < 0x00100000) {	/* subnormal x */
+		if (hx == 0) {
+			for (ix = -1043, i = lx; i > 0; i <<= 1)
+				ix -= 1;
+		} else {
+			for (ix = -1022, i = (hx << 11); i > 0; i <<= 1)
+				ix -= 1;
+		}
+	} else
+		ix = (hx >> 20) - 1023;
+
+	/* determine iy = ilogb(y) */
+	if (hy < 0x00100000) {	/* subnormal y */
+		if (hy == 0) {
+			for (iy = -1043, i = ly; i > 0; i <<= 1)
+				iy -= 1;
+		} else {
+			for (iy = -1022, i = (hy << 11); i > 0; i <<= 1)
+				iy -= 1;
+		}
+	} else
+		iy = (hy >> 20) - 1023;
+
+	/* set up {hx,lx}, {hy,ly} and align y to x */
+	if (ix >= -1022)
+		hx = 0x00100000 | (0x000fffff & hx);
+	else {			/* subnormal x, shift x to normal */
+		n = -1022 - ix;
+		if (n <= 31) {
+			hx = (hx << n) | (lx >> (32 - n));
+			lx <<= n;
+		} else {
+			hx = lx << (n - 32);
+			lx = 0;
+		}
+	}
+	if (iy >= -1022)
+		hy = 0x00100000 | (0x000fffff & hy);
+	else {			/* subnormal y, shift y to normal */
+		n = -1022 - iy;
+		if (n <= 31) {
+			hy = (hy << n) | (ly >> (32 - n));
+			ly <<= n;
+		} else {
+			hy = ly << (n - 32);
+			ly = 0;
+		}
+	}
+
+	/* fix point fmod */
+	n = ix - iy;
+	m = 0;
+	while (n--) {
+		hz = hx - hy;
+		lz = lx - ly;
+		if (lx < ly)
+			hz -= 1;
+		if (hz < 0) {
+			hx = hx + hx + (lx >> 31);
+			lx = lx + lx;
+		} else {
+			m += 1;
+			if ((hz | lz) == 0) {	/* return sign(x)*0 */
+				if (n < 31)
+					m <<= 1 + n;
+				else
+					m = 0;
+				m &= 0x7fffffff;
+				*quo = sq >= 0 ? m : -m;
+				return (Zero[(unsigned) sx >> 31]);
+			}
+			hx = hz + hz + (lz >> 31);
+			lx = lz + lz;
+		}
+		m += m;
+	}
+	hz = hx - hy;
+	lz = lx - ly;
+	if (lx < ly)
+		hz -= 1;
+	if (hz >= 0) {
+		hx = hz;
+		lx = lz;
+		m += 1;
+	}
+	m &= 0x7fffffff;
+	*quo = sq >= 0 ? m : -m;
+
+	/* convert back to floating value and restore the sign */
+	if ((hx | lx) == 0) {	/* return sign(x)*0 */
+		return (Zero[(unsigned) sx >> 31]);
+	}
+	while (hx < 0x00100000) {	/* normalize x */
+		hx = hx + hx + (lx >> 31);
+		lx = lx + lx;
+		iy -= 1;
+	}
+	if (iy >= -1022) {	/* normalize output */
+		hx = (hx - 0x00100000) | ((iy + 1023) << 20);
+		__HI(x) = hx | sx;
+		__LO(x) = lx;
+	} else {			/* subnormal output */
+		n = -1022 - iy;
+		if (n <= 20) {
+			lx = (lx >> n) | ((unsigned) hx << (32 - n));
+			hx >>= n;
+		} else if (n <= 31) {
+			lx = (hx << (32 - n)) | (lx >> n);
+			hx = sx;
+		} else {
+			lx = hx >> (n - 32);
+			hx = sx;
+		}
+		__HI(x) = hx | sx;
+		__LO(x) = lx;
+		x *= one;	/* create necessary signal */
+	}
+	return (x);		/* exact output */
+}
+
+#define	zero	Zero[0]
+
+double
+remquo(double x, double y, int *quo) {
+	int hx, hy, sx, sq;
+	double v;
+	unsigned ly;
+
+	hx = __HI(x);		/* high word of x */
+	hy = __HI(y);		/* high word of y */
+	ly = __LO(y);		/* low  word of y */
+	sx = hx & 0x80000000;	/* sign of x */
+	sq = (hx ^ hy) & 0x80000000;	/* sign of x/y */
+	hx ^= sx;		/* |x| */
+	hy &= 0x7fffffff;	/* |y| */
+
+	/* purge off exception values */
+	*quo = 0;
+	if ((hy | ly) == 0 || hx >= 0x7ff00000 ||	/* y=0, or x !finite */
+	    (hy | ((ly | -ly) >> 31)) > 0x7ff00000)	/* or y is NaN */
+		return ((x * y) / (x * y));
+
+	y = fabs(y);
+	x = fabs(x);
+	if (hy <= 0x7fdfffff) {
+		x = fmodquo(x, y + y, quo);
+		*quo = ((*quo) & 0x3fffffff) << 1;
+	}
+	if (hy < 0x00200000) {
+		if (x + x > y) {
+			*quo += 1;
+			if (x == y)
+				x = zero;
+			else
+				x -= y;
+			if (x + x >= y) {
+				x -= y;
+				*quo += 1;
+			}
+		}
+	} else {
+		v = 0.5 * y;
+		if (x > v) {
+			*quo += 1;
+			if (x == y)
+				x = zero;
+			else
+				x -= y;
+			if (x >= v) {
+				x -= y;
+				*quo += 1;
+			}
+		}
+	}
+	if (sq != 0)
+		*quo = -(*quo);
+	return (sx == 0 ? x : -x);
+}
