1
2/* @(#)w_acos.c 1.3 95/01/18 */
3/*
4 * ====================================================
5 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
6 *
7 * Developed at SunSoft, a Sun Microsystems, Inc. business.
8 * Permission to use, copy, modify, and distribute this
9 * software is freely granted, provided that this notice
10 * is preserved.
11 * ====================================================
12 */
13
14/*
15 * wrap_acos(x)
16 */
17
18#include "fdlibm.h"
19
20
21#ifdef __STDC__
22	double ieee_acos(double x)		/* wrapper acos */
23#else
24	double ieee_acos(x)			/* wrapper acos */
25	double x;
26#endif
27{
28#ifdef _IEEE_LIBM
29	return __ieee754_acos(x);
30#else
31	double z;
32	z = __ieee754_acos(x);
33	if(_LIB_VERSION == _IEEE_ || ieee_isnan(x)) return z;
34	if(ieee_fabs(x)>1.0) {
35	        return __kernel_standard(x,x,1); /* ieee_acos(|x|>1) */
36	} else
37	    return z;
38#endif
39}
40