From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001
From: upstream source tree <ports@midipix.org>
Date: Sun, 15 Mar 2015 20:14:05 -0400
Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified
 gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream
 tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.
---
 libgo/go/math/tanh.go | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 libgo/go/math/tanh.go

(limited to 'libgo/go/math/tanh.go')

diff --git a/libgo/go/math/tanh.go b/libgo/go/math/tanh.go
new file mode 100644
index 000000000..8bcf2ddac
--- /dev/null
+++ b/libgo/go/math/tanh.go
@@ -0,0 +1,28 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package math
+
+
+/*
+	Floating-point hyperbolic tangent.
+
+	Sinh and Cosh are called except for large arguments, which
+	would cause overflow improperly.
+*/
+
+// Tanh computes the hyperbolic tangent of x.
+func Tanh(x float64) float64 {
+	if x < 0 {
+		x = -x
+		if x > 21 {
+			return -1
+		}
+		return -Sinh(x) / Cosh(x)
+	}
+	if x > 21 {
+		return 1
+	}
+	return Sinh(x) / Cosh(x)
+}
-- 
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