root/src/pkg/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 "../../cmd/ld/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
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