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. 4 5 package math 6 7 // Signbit returns true if x is negative or negative zero. 8 func Signbit(x float64) bool { 9 return Float64bits(x)&(1<<63) != 0 10 } 11
