From 5ff4c17907d5b19510a62e08fd8d3b11e62b431d Mon Sep 17 00:00:00 2001
From: Ondřej Surý <ondrej@sury.org>
Date: Tue, 13 Sep 2011 13:13:40 +0200
Subject: Imported Upstream version 60

---
 src/pkg/cmath/phase.go | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 src/pkg/cmath/phase.go

(limited to 'src/pkg/cmath/phase.go')

diff --git a/src/pkg/cmath/phase.go b/src/pkg/cmath/phase.go
new file mode 100644
index 000000000..2d67aa34c
--- /dev/null
+++ b/src/pkg/cmath/phase.go
@@ -0,0 +1,11 @@
+// Copyright 2010 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 cmath
+
+import "math"
+
+// Phase returns the phase (also called the argument) of x.
+// The returned value is in the range [-Pi, Pi].
+func Phase(x complex128) float64 { return math.Atan2(imag(x), real(x)) }
-- 
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