/*      $OpenBSD: s_cos.S,v 1.3 2016/09/12 19:47:02 guenther Exp $ */
/*
 * Written by J.T. Conklin <jtc@netbsd.org>.
 * Public domain.
 */

#include "DEFS.h"

ENTRY(cos)
        fldl    4(%esp)
        fcos
        fnstsw  %ax
        andw    $0x400,%ax
        jnz     1f
        ret     
1:      fldpi
        fadd    %st(0)
        fxch    %st(1)
2:      fprem1
        fnstsw  %ax
        andw    $0x400,%ax
        jnz     2b
        fstp    %st(1)
        fcos
        ret
END_STD(cos)