/* $OpenBSD: e_asin.S,v 1.3 2008/09/07 20:36:08 martynas Exp $ */ /* * Written by J.T. Conklin <jtc@NetBSD.org>. * Public domain. */ #include <machine/asm.h> #include "abi.h" /* asin = atan (x / sqrt(1 - x^2)) */ ENTRY(asin) 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) */ fpatan XMM_DOUBLE_EPILOGUE ret