// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package math
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// Copysign returns a value with the magnitude
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// of x and the sign of y.
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func Copysign(x, y float64) float64 {
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const sign = 1 << 63
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return Float64frombits(Float64bits(x)&^sign | Float64bits(y)&sign)
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}
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