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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.
+
+// func Atan(x float64) float64
+TEXT ·Atan(SB),7,$0
+ FMOVD x+0(FP), F0 // F0=x
+ FLD1 // F0=1, F1=x
+ FPATAN // F0=atan(F1/F0)
+ FMOVDP F0, r+8(FP)
+ RET