// 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. | |
package math | |
// Copysign(x, y) returns a value with the magnitude | |
// of x and the sign of y. | |
func Copysign(x, y float64) float64 { | |
const sign = 1 << 63 | |
return Float64frombits(Float64bits(x)&^sign | Float64bits(y)&sign) | |
} |