| Charles L. Dorian | 9aa8f95 | 2010-04-08 13:24:04 -0700 | [diff] [blame] | 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 | } | ||||