github.com/likebike/go--@v0.0.0-20190911215757-0bd925d16e96/go/src/math/atan2_386.s (about)

     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 Atan2(y, x float64) float64	// =atan(y/x)
     8  TEXT ·Atan2(SB),NOSPLIT,$0
     9  	FMOVD   y+0(FP), F0  // F0=y
    10  	FMOVD   x+8(FP), F0  // F0=x, F1=y
    11  	FPATAN               // F0=atan(F1/F0)
    12  	FMOVDP  F0, ret+16(FP)
    13  	RET