// 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. | |
// Copyright ©2017 The Gonum 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 math32 | |
import "math" | |
// Signbit returns true if x is negative or negative zero. | |
func Signbit(x float32) bool { | |
return math.Float32bits(x)&(1<<31) != 0 | |
} |