1 files changed, 90 insertions, 0 deletions
diff --git a/usr/src/lib/libm/common/Q/sinhl.c b/usr/src/lib/libm/common/Q/sinhl.c
new file mode 100644
index 0000000000..dc37e457a7
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+++ b/usr/src/lib/libm/common/Q/sinhl.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 sinhl = __sinhl
+
+#include "libm.h"
+#include "longdouble.h"
+
+/*
+ * sinhl(X)
+ * RETURN THE HYPERBOLIC SINE OF X
+ *
+ * Method :
+ *	1. reduce x to non-negative by sinhl(-x) = - sinhl(x).
+ *	2.
+ *
+ *					     expm1l(x) + expm1l(x)/(expm1l(x)+1)
+ *	0 <= x <= lnovft	: sinhl(x) := --------------------------------
+ *							     2
+ *
+ *     lnovft <= x <  INF	: sinhl(x) := expl(x-MEP1*ln2)*2**ME
+ *
+ * here
+ *	lnovft:		logrithm of the overflow threshold
+ *			= MEP1*ln2 chopped to machine precision.
+ *	ME		maximum exponent
+ *	MEP1		maximum exponent plus 1
+ *
+ * Special cases:
+ *	sinhl(x) is x if x is +INF, -INF, or NaN.
+ *	only sinhl(0)=0 is exact for finite argument.
+ *
+ */
+
+#define	ME	16383
+#define	MEP1	16384
+#define	LNOVFT	1.135652340629414394949193107797076342845e+4L
+		/* last 32 bits of LN2HI is zero */
+#define	LN2HI   6.931471805599453094172319547495844850203e-0001L
+#define	LN2LO   1.667085920830552208890449330400379754169e-0025L
+
+static const long double
+	half	= 0.5L,
+	one	= 1.0L,
+	ln2hi	= LN2HI,
+	ln2lo	= LN2LO,
+	lnovftL	= LNOVFT;
+
+long double
+sinhl(long double x) {
+	long double r, t;
+
+	if (!finitel(x))
+		return (x + x);	/* sinh of NaN or +-INF is itself */
+	r = fabsl(x);
+	if (r < lnovftL) {
+		t = expm1l(r);
+		r = copysignl((t + t / (one + t)) * half, x);
+	} else {
+		r = copysignl(expl((r - MEP1 * ln2hi) - MEP1 * ln2lo), x);
+		r = scalbnl(r, ME);
+	}
+	return (r);
+}