1// Copyright 2009 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
5package math
6
7// Abs returns the absolute value of x.
8//
9// Special cases are:
10//	Abs(±Inf) = +Inf
11//	Abs(NaN) = NaN
12
13//extern fabs
14func libc_fabs(float64) float64
15
16func Abs(x float64) float64 {
17	return libc_fabs(x)
18}
19
20func abs(x float64) float64 {
21	return Float64frombits(Float64bits(x) &^ (1 << 63))
22}
23