1 files changed, 21 insertions, 0 deletions
diff --git a/libgo/go/cmath/isinf.go b/libgo/go/cmath/isinf.go
new file mode 100644
index 00000000000..f17a752ecb0
--- /dev/null
+++ b/libgo/go/cmath/isinf.go
@@ -0,0 +1,21 @@
+// 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"
+
+// IsInf returns true if either real(x) or imag(x) is an infinity.
+func IsInf(x complex128) bool {
+	if math.IsInf(real(x), 0) || math.IsInf(imag(x), 0) {
+		return true
+	}
+	return false
+}
+
+// Inf returns a complex infinity, cmplx(+Inf, +Inf).
+func Inf() complex128 {
+	inf := math.Inf(1)
+	return cmplx(inf, inf)
+}