--- /dev/null	Sat May 10 12:09:52 2014
+++ new/usr/src/lib/libmvec/common/__vlog.c	Sat May 10 12:09:52 2014
@@ -0,0 +1,787 @@
+/*
+ * 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 2005 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*
+ * __vlog: double precision vector log
+ *
+ * Algorithm:
+ *
+ * Write x = 2^n z where 1 - 2^-10 <= z < 2 - 2^-9.  Let m = z
+ * rounded to nine significant bits, so m = 1 + 2^-8 k, where
+ * 0 <= k <= 255.  Let d = z - m.  Then
+ *
+ * log(x) = n log(2) + log(m) + log(1+(d/m))
+ *
+ * Let ln2hi = log(2) rounded to a multiple of 2^-42 and ln2lo
+ * ~ log(2) - ln2hi.  From a table, obtain mh and ml such that
+ * mh = log(m) rounded to a multiple of 2^-42 and ml ~ log(m) -
+ * mh.  From the same table, obtain rh and rl such that rh = 1/m
+ * rounded to a multiple of 2^-10 and rl ~ 1/m - rh.  For |y| <=
+ * 2^-9, approximate log(1+y) by a polynomial y+p(y) where p(y)
+ * := y*y*(-1/2+y*(P3+y*(P4+y*(P5+y*P6)))).  Now letting s =
+ * d*rh + d*rl in double precision, we can compute the sum above
+ * accurately as
+ *
+ * (n*ln2hi + mh) + (d*rh + (d*rl + (n*ln2lo + ml) + p(s)))
+ *
+ * When x is subnormal, we first scale it to the normal range,
+ * adjusting n accordingly.
+ *
+ * Accuracy:
+ *
+ * The largest error observed is less than 0.8 ulps.
+ */
+
+#include <sys/isa_defs.h>
+
+#ifdef _LITTLE_ENDIAN
+#define	HI(x)	*(1+(int *)&x)
+#define	LO(x)	*(unsigned *)&x
+#define	HIWORD	1
+#define	LOWORD	0
+#else
+#define	HI(x)	*(int *)&x
+#define	LO(x)	*(1+(unsigned *)&x)
+#define	HIWORD	0
+#define	LOWORD	1
+#endif
+
+#ifdef __RESTRICT
+#define	restrict _Restrict
+#else
+#define	restrict
+#endif
+
+static const double TBL[] = {
+	1.00000000000000000000e+00,  0.00000000000000000000e+00,
+	0.00000000000000000000e+00,  0.00000000000000000000e+00,
+	9.96093750000000000000e-01,  1.51994163424124515728e-05,
+	3.89864041562759666704e-03,  2.97263469009289512726e-14,
+	9.92187500000000000000e-01,  6.05620155038759681518e-05,
+	7.78214044203195953742e-03,  2.29894100462035112076e-14,
+	9.88281250000000000000e-01,  1.35738416988416988208e-04,
+	1.16506172200843138853e-02, -1.09039749717359319029e-13,
+	9.84375000000000000000e-01,  2.40384615384615397959e-04,
+	1.55041865359635266941e-02,  1.72745674997061065553e-15,
+	9.80468750000000000000e-01,  3.74161877394636028203e-04,
+	1.93429628432113531744e-02, -8.04185385052258635682e-14,
+	9.77539062500000000000e-01, -4.39825858778625927714e-04,
+	2.31670592816044518258e-02, -7.00735970431003565857e-14,
+	9.73632812500000000000e-01, -2.48782081749049442231e-04,
+	2.69765876983001362532e-02, -9.80605051684317662887e-14,
+	9.69726562500000000000e-01, -2.95928030303030311244e-05,
+	3.07716586667083902285e-02,  4.52981425779092882775e-14,
+	9.65820312500000000000e-01,  2.17423349056603779517e-04,
+	3.45523815067281248048e-02, -6.83913974232877736961e-14,
+	9.62890625000000000000e-01, -4.84609962406015010693e-04,
+	3.83188643020275776507e-02,  1.09021543022033016421e-13,
+	9.58984375000000000000e-01, -1.82876872659176042957e-04,
+	4.20712139207353175152e-02, -4.82631400055112824008e-14,
+	9.55078125000000000000e-01,  1.45755597014925360189e-04,
+	4.58095360313564015087e-02, -6.21983419947579227529e-14,
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+	4.95339351223265111912e-02, -4.98803091079814255646e-14,
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+	6.47185044995239877608e-01,  6.96725146472247760395e-14,
+	5.22460937500000000000e-01, -1.19579081632653055071e-05,
+	6.49227946625160257099e-01, -5.04382083563449091526e-14,
+	5.21484375000000000000e-01, -9.94462830957230209915e-05,
+	6.51266683315043337643e-01, -8.52342468131615437746e-14,
+	5.20507812500000000000e-01, -1.82609247967479665321e-04,
+	6.53301272012640765752e-01,  1.04873006903856996874e-13,
+	5.19531250000000000000e-01, -2.61473123732251517670e-04,
+	6.55331729563158660312e-01, -3.10282172335227455825e-14,
+	5.18554687500000000000e-01, -3.36064018218623454786e-04,
+	6.57358072708348117885e-01,  1.19122567102055698791e-14,
+	5.17578125000000000000e-01, -4.06407828282828297722e-04,
+	6.59380318089233696810e-01, -1.05870694633429062178e-13,
+	5.16601562500000000000e-01, -4.72530241935483884957e-04,
+	6.61398482245431296178e-01, -6.62879179039074743232e-14,
+	5.14648437500000000000e-01,  4.42105759557344087183e-04,
+	6.63412581616967145237e-01,  9.91058598099467920662e-14,
+	5.13671875000000000000e-01,  3.84349899598393583006e-04,
+	6.65422632545187298092e-01, -9.68491419671810783613e-14,
+	5.12695312500000000000e-01,  3.30739604208416838882e-04,
+	6.67428651271848139004e-01,  1.08050943383646665619e-13,
+	5.11718750000000000000e-01,  2.81249999999999978750e-04,
+	6.69430653942526987521e-01,  1.02279777907416200886e-13,
+	5.10742187500000000000e-01,  2.35856412175648700539e-04,
+	6.71428656605257856427e-01,  4.44668903784876907111e-14,
+	5.09765625000000000000e-01,  1.94534362549800786662e-04,
+	6.73422675212123067467e-01,  4.36528304869414810551e-14,
+	5.08789062500000000000e-01,  1.57259567594433401650e-04,
+	6.75412725620162746054e-01,  1.39850267837821649808e-14,
+	5.07812500000000000000e-01,  1.24007936507936501053e-04,
+	6.77398823591829568613e-01, -2.34278036379790696248e-14,
+	5.06835937500000000000e-01,  9.47555693069306959140e-05,
+	6.79380984795898257289e-01, -1.00907141981183426552e-13,
+	5.05859375000000000000e-01,  6.94787549407114679145e-05,
+	6.81359224807920327294e-01, -1.72583456150091690167e-14,
+	5.04882812500000000000e-01,  4.81539694280078915244e-05,
+	6.83333559111588328960e-01,  3.23592040115024425781e-14,
+	5.03906250000000000000e-01,  3.07578740157480310692e-05,
+	6.85304003098963221419e-01, -4.38048746232309815355e-14,
+	5.02929687500000000000e-01,  1.72673133595284864178e-05,
+	6.87270572070929119946e-01,  3.11475515031130920163e-14,
+	5.01953125000000000000e-01,  7.65931372549019597214e-06,
+	6.89233281238784911693e-01,  2.40686318405286681994e-14,
+	5.00976562500000000000e-01,  1.91108121330724059841e-06,
+	6.91192145724244255689e-01, -1.02296829368141946888e-13,
+};
+
+static const double C[] = {
+	6.93147180559890330187e-01,
+	5.49792301870837115524e-14,
+	-0.5,
+	3.33333333332438282293284931714682042701467889609e-0001,
+	-2.49999999998669026809069285994497705748522309858e-0001,
+	2.00000758613044543658508591796951886624273250472e-0001,
+	-1.66667492411916229281646821123333564982955309481e-0001,
+	4503599627370496.0,
+	0.0
+};
+
+#define	ln2hi	C[0]
+#define	ln2lo	C[1]
+#define	mhalf	C[2]
+#define	P3	C[3]
+#define	P4	C[4]
+#define	P5	C[5]
+#define	P6	C[6]
+#define	two52	C[7]
+#define	zero	C[8]
+
+#define	PROCESS(N)							\
+	i##N = (i##N + 0x800) & ~0xfff;					\
+	e = (i##N & 0x7ff00000) - 0x3ff00000;				\
+	z##N.i[HIWORD] -= e;						\
+	w##N.i[HIWORD] = i##N - e;					\
+	w##N.i[LOWORD] = 0;						\
+	n##N += (e >> 20);						\
+	i##N = (i##N >> 10) & 0x3fc;					\
+	d##N = z##N.d - w##N.d;					\
+	h##N = d##N * TBL[i##N];					\
+	l##N = d##N * TBL[i##N+1];					\
+	s##N = h##N + l##N;						\
+	b##N = (s##N * s##N) * (mhalf + s##N * (P3 + s##N * (P4 +	\
+	    s##N * (P5 + s##N * P6))));					\
+	*y = (n##N * ln2hi + TBL[i##N+2]) + (h##N + (l##N +		\
+	    (n##N * ln2lo + TBL[i##N+3]) + b##N));			\
+	y += stridey
+
+#define	PREPROCESS(N, index, label)					\
+	i##N = HI(*x);							\
+	z##N.d = *x;							\
+	x += stridex;							\
+	n##N = 0;							\
+	if ((i##N & 0x7ff00000) == 0x7ff00000) { /* inf or NaN */	\
+		y[index] = z##N.d * ((i##N < 0)? zero : z##N.d);	\
+		goto label;						\
+	} else if (i##N < 0x00100000) { /* subnormal, negative, zero */	\
+		if (((i##N << 1) | z##N.i[LOWORD]) == 0) {		\
+			y[index] = mhalf / zero;			\
+			goto label;					\
+		} else if (i##N < 0) {					\
+			y[index] = zero / zero;				\
+			goto label;					\
+		}							\
+		z##N.d *= two52;					\
+		n##N = -52;						\
+		i##N = z##N.i[HIWORD];				\
+	}
+
+void
+__vlog(int n, double *restrict x, int stridex, double *restrict y,
+	int stridey)
+{
+	union {
+		unsigned	i[2];
+		double		d;
+	} z0, z1, z2, z3, w0, w1, w2, w3;
+	double	b0, b1, b2, b3;
+	double	d0, d1, d2, d3;
+	double	h0, h1, h2, h3;
+	double	l0, l1, l2, l3;
+	double	s0, s1, s2, s3;
+	int	i0, i1, i2, i3, e;
+	int	n0, n1, n2, n3;
+
+	w0.i[LOWORD] = 0;
+	w1.i[LOWORD] = 0;
+	w2.i[LOWORD] = 0;
+	w3.i[LOWORD] = 0;
+
+	y -= stridey;
+
+	for (;;) {
+begin:
+		y += stridey;
+
+		if (--n < 0)
+			break;
+
+		PREPROCESS(0, 0, begin);
+
+		if (--n < 0)
+			goto process1;
+
+		PREPROCESS(1, stridey, process1);
+
+		if (--n < 0)
+			goto process2;
+
+		PREPROCESS(2, (stridey << 1), process2);
+
+		if (--n < 0)
+			goto process3;
+
+		PREPROCESS(3, (stridey << 1) + stridey, process3);
+
+		i0 = (i0 + 0x800) & ~0xfff;
+		e = (i0 & 0x7ff00000) - 0x3ff00000;
+		z0.i[HIWORD] -= e;
+		w0.i[HIWORD] = i0 - e;
+		n0 += (e >> 20);
+		i0 = (i0 >> 10) & 0x3fc;
+
+		i1 = (i1 + 0x800) & ~0xfff;
+		e = (i1 & 0x7ff00000) - 0x3ff00000;
+		z1.i[HIWORD] -= e;
+		w1.i[HIWORD] = i1 - e;
+		n1 += (e >> 20);
+		i1 = (i1 >> 10) & 0x3fc;
+
+		i2 = (i2 + 0x800) & ~0xfff;
+		e = (i2 & 0x7ff00000) - 0x3ff00000;
+		z2.i[HIWORD] -= e;
+		w2.i[HIWORD] = i2 - e;
+		n2 += (e >> 20);
+		i2 = (i2 >> 10) & 0x3fc;
+
+		i3 = (i3 + 0x800) & ~0xfff;
+		e = (i3 & 0x7ff00000) - 0x3ff00000;
+		z3.i[HIWORD] -= e;
+		w3.i[HIWORD] = i3 - e;
+		n3 += (e >> 20);
+		i3 = (i3 >> 10) & 0x3fc;
+
+		d0 = z0.d - w0.d;
+		d1 = z1.d - w1.d;
+		d2 = z2.d - w2.d;
+		d3 = z3.d - w3.d;
+
+		h0 = d0 * TBL[i0];
+		h1 = d1 * TBL[i1];
+		h2 = d2 * TBL[i2];
+		h3 = d3 * TBL[i3];
+
+		l0 = d0 * TBL[i0+1];
+		l1 = d1 * TBL[i1+1];
+		l2 = d2 * TBL[i2+1];
+		l3 = d3 * TBL[i3+1];
+
+		s0 = h0 + l0;
+		s1 = h1 + l1;
+		s2 = h2 + l2;
+		s3 = h3 + l3;
+
+		b0 = (s0 * s0) * (mhalf + s0 * (P3 + s0 * (P4 +
+		    s0 * (P5 + s0 * P6))));
+		b1 = (s1 * s1) * (mhalf + s1 * (P3 + s1 * (P4 +
+		    s1 * (P5 + s1 * P6))));
+		b2 = (s2 * s2) * (mhalf + s2 * (P3 + s2 * (P4 +
+		    s2 * (P5 + s2 * P6))));
+		b3 = (s3 * s3) * (mhalf + s3 * (P3 + s3 * (P4 +
+		    s3 * (P5 + s3 * P6))));
+
+		*y = (n0 * ln2hi + TBL[i0+2]) + (h0 + (l0 +
+		    (n0 * ln2lo + TBL[i0+3]) + b0));
+		y += stridey;
+		*y = (n1 * ln2hi + TBL[i1+2]) + (h1 + (l1 +
+		    (n1 * ln2lo + TBL[i1+3]) + b1));
+		y += stridey;
+		*y = (n2 * ln2hi + TBL[i2+2]) + (h2 + (l2 +
+		    (n2 * ln2lo + TBL[i2+3]) + b2));
+		y += stridey;
+		*y = (n3 * ln2hi + TBL[i3+2]) + (h3 + (l3 +
+		    (n3 * ln2lo + TBL[i3+3]) + b3));
+		continue;
+
+process1:
+		PROCESS(0);
+		continue;
+
+process2:
+		PROCESS(0);
+		PROCESS(1);
+		continue;
+
+process3:
+		PROCESS(0);
+		PROCESS(1);
+		PROCESS(2);
+	}
+}
