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diff --git a/src/math/atan_386.s b/src/math/atan_386.s
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-// 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.
-
-#include "textflag.h"
-
-// func Atan(x float64) float64
-TEXT ·Atan(SB),NOSPLIT,$0
- FMOVD x+0(FP), F0 // F0=x
- FLD1 // F0=1, F1=x
- FPATAN // F0=atan(F1/F0)
- FMOVDP F0, ret+8(FP)
- RET