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// 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
}