25 lines
444 B
ArmAsm
25 lines
444 B
ArmAsm
/*
|
|
* Written by J.T. Conklin <jtc@NetBSD.org>.
|
|
* Public domain.
|
|
*/
|
|
|
|
#include <machine/asm.h>
|
|
|
|
#include "abi.h"
|
|
|
|
RCSID("$NetBSD: e_acos.S,v 1.8 2003/07/26 19:24:57 salo Exp $")
|
|
|
|
/* acos = atan (sqrt(1 - x^2) / x) */
|
|
ENTRY(__ieee754_acos)
|
|
XMM_ONE_ARG_DOUBLE_PROLOGUE
|
|
fldl ARG_DOUBLE_ONE /* x */
|
|
fld %st(0)
|
|
fmul %st(0) /* x^2 */
|
|
fld1
|
|
fsubp /* 1 - x^2 */
|
|
fsqrt /* sqrt (1 - x^2) */
|
|
fxch %st(1)
|
|
fpatan
|
|
XMM_DOUBLE_EPILOGUE
|
|
ret
|