1 // Copyright 2010 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 #include "textflag.h" 6 7 // func Atan(x float64) float64 8 TEXT Atan(SB),NOSPLIT,$0 9 FMOVD x+0(FP), F0 // F0=x 10 FLD1 // F0=1, F1=x 11 FPATAN // F0=atan(F1/F0) 12 FMOVDP F0, ret+8(FP) 13 RET 14
