1/*	$OpenBSD: e_asin.S,v 1.4 2016/09/12 19:47:02 guenther Exp $ */
2/*
3 * Written by J.T. Conklin <jtc@netbsd.org>.
4 * Public domain.
5 */
6
7#include "DEFS.h"
8
9/* asin = atan (x / sqrt(1 - x^2)) */
10ENTRY(asin)
11	fldl	4(%esp)			/* x */
12	fst	%st(1)
13	fmul	%st(0)			/* x^2 */
14	fld1
15	fsubp				/* 1 - x^2 */
16	fsqrt				/* sqrt (1 - x^2) */
17	fpatan
18	ret
19END_STD(asin)
20