/*
 * Written by J.T. Conklin <jtc@NetBSD.org>.
 * Public domain.
 */

#include <machine/asm.h>

#include "abi.h"

RCSID("$NetBSD: e_asin.S,v 1.7 2003/07/26 19:24:58 salo Exp $")

/* asin = atan (x / sqrt(1 - x^2)) */
ENTRY(__ieee754_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