1 // Copyright 2010 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
5 // Copyright ©2017 The Gonum Authors. All rights reserved.
6 // Use of this source code is governed by a BSD-style
7 // license that can be found in the LICENSE file.
13 // Signbit returns true if x is negative or negative zero.
14 func Signbit(x float32) bool {
15 return math.Float32bits(x)&(1<<31) != 0