From f154da9e12608589e8d5f0508f908a0c3e88a1bb Mon Sep 17 00:00:00 2001 From: Tianon Gravi Date: Thu, 15 Jan 2015 11:54:00 -0700 Subject: Imported Upstream version 1.4 --- src/math/signbit.go | 10 ++++++++++ 1 file changed, 10 insertions(+) create mode 100644 src/math/signbit.go (limited to 'src/math/signbit.go') diff --git a/src/math/signbit.go b/src/math/signbit.go new file mode 100644 index 000000000..670cc1a66 --- /dev/null +++ b/src/math/signbit.go @@ -0,0 +1,10 @@ +// 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 math + +// Signbit returns true if x is negative or negative zero. +func Signbit(x float64) bool { + return Float64bits(x)&(1<<63) != 0 +} -- cgit v1.2.3