693 Opensource replacement of sunwlibm

Reviewed by: Igor Kozhukhov ikozhukhov@gmail.com
Reviewed by: Keith M Wesolowski <keith.wesolowski@joyent.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Approved by: Dan McDonald <danmcd@omniti.com>

1 files changed, 60 insertions, 0 deletions

diff --git a/usr/src/lib/libm/common/Q/asinhl.c b/usr/src/lib/libm/common/Q/asinhl.c
new file mode 100644
index 0000000000..32f9d4b086
--- /dev/null
+++ b/usr/src/lib/libm/common/Q/asinhl.c
@@ -0,0 +1,60 @@
+/*
+ * 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 asinhl = __asinhl
+#endif
+
+#include "libm.h"
+
+static const long double
+	ln2	= 6.931471805599453094172321214581765680755e-0001L,
+	one	= 1.0L,
+	big	= 1.0e+20L,
+	tiny	= 1.0e-20L;
+
+long double
+asinhl(long double x) {
+	long double t, w;
+	volatile long double dummy;
+
+	w = fabsl(x);
+	if (isnanl(x))
+		return (x + x);	/* x is NaN */
+	if (w < tiny) {
+#ifndef lint
+		dummy = x + big;	/* inexact if x != 0 */
+#endif
+		return (x);	/* tiny x */
+	} else if (w < big) {
+		t = one / w;
+		return (copysignl(log1pl(w + w / (t + sqrtl(one + t * t))), x));
+	} else
+		return (copysignl(logl(w) + ln2, x));
+}