/*      $OpenBSD: e_asin.S,v 1.4 2016/09/12 19:47:02 guenther Exp $ */
/*
 * Written by J.T. Conklin <jtc@netbsd.org>.
 * Public domain.
 */

#include "DEFS.h"

/* asin = atan (x / sqrt(1 - x^2)) */
ENTRY(asin)
        fldl    4(%esp)                 /* x */
        fst     %st(1)
        fmul    %st(0)                  /* x^2 */
        fld1
        fsubp                           /* 1 - x^2 */
        fsqrt                           /* sqrt (1 - x^2) */
        fpatan
        ret
END_STD(asin)