From 7ce331c01ce6eb7b3f5c715a38a24359da9c6ee2 Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Thu, 22 Nov 2001 14:04:29 +0000
Subject: Totally rework the math library, this time based on the MacOs X math
 library (which is itself based on the math lib from FreeBSD).  -Erik

---
 libm/w_atanh.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 libm/w_atanh.c

(limited to 'libm/w_atanh.c')

diff --git a/libm/w_atanh.c b/libm/w_atanh.c
new file mode 100644
index 000000000..e0716c2b3
--- /dev/null
+++ b/libm/w_atanh.c
@@ -0,0 +1,47 @@
+/* @(#)w_atanh.c 5.1 93/09/24 */
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice 
+ * is preserved.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: w_atanh.c,v 1.6 1995/05/10 20:48:43 jtc Exp $";
+#endif
+
+/* 
+ * wrapper atanh(x)
+ */
+
+#include "math.h"
+#include "math_private.h"
+
+
+#ifdef __STDC__
+	double atanh(double x)		/* wrapper atanh */
+#else
+	double atanh(x)			/* wrapper atanh */
+	double x;
+#endif
+{
+#ifdef _IEEE_LIBM
+	return __ieee754_atanh(x);
+#else
+	double z,y;
+	z = __ieee754_atanh(x);
+	if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
+	y = fabs(x);
+	if(y>=1.0) {
+	    if(y>1.0)
+	        return __kernel_standard(x,x,30); /* atanh(|x|>1) */
+	    else 
+	        return __kernel_standard(x,x,31); /* atanh(|x|==1) */
+	} else
+	    return z;
+#endif
+}
-- 
cgit v1.2.3