Home | History | Annotate | Line # | Download | only in i387 
      1  1.1     jtc /*
      2  1.8    salo  * Written by J.T. Conklin <jtc (at) NetBSD.org>.
      3  1.3     jtc  * Public domain.
      4  1.1     jtc  */
      5  1.1     jtc 
      6  1.1     jtc #include <machine/asm.h>
      7  1.1     jtc 
      8  1.7    fvdl #include "abi.h"
      9  1.7    fvdl 
     10  1.9     dsl RCSID("$NetBSD: e_acos.S,v 1.9 2014/03/03 08:00:50 dsl Exp $")
     11  1.2     jtc 
     12  1.1     jtc /* acos = atan (sqrt(1 - x^2) / x) */
     13  1.1     jtc ENTRY(__ieee754_acos)
     14  1.7    fvdl 	XMM_ONE_ARG_DOUBLE_PROLOGUE
     15  1.7    fvdl 	fldl	ARG_DOUBLE_ONE		/* x */
     16  1.6  kleink 	fld	%st(0)
     17  1.1     jtc 	fmul	%st(0)			/* x^2 */
     18  1.5  simonb 	fld1
     19  1.1     jtc 	fsubp				/* 1 - x^2 */
     20  1.1     jtc 	fsqrt				/* sqrt (1 - x^2) */
     21  1.9     dsl 	fabs				/* Change -0.0 to +0.0 */
     22  1.1     jtc 	fxch	%st(1)
     23  1.1     jtc 	fpatan
     24  1.7    fvdl 	XMM_DOUBLE_EPILOGUE
     25  1.1     jtc 	ret
     26