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go/src/math/copysign.go
Russ Cox c007ce824d build: move package sources from src/pkg to src
Preparation was in CL 134570043.
This CL contains only the effect of 'hg mv src/pkg/* src'.
For more about the move, see golang.org/s/go14nopkg.
2014-09-08 00:08:51 -04:00

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Go

// 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 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)
}