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