1
2/*
3 * Copyright (c) 1998, 2001, Oracle and/or its affiliates. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation. Oracle designates this
9 * particular file as subject to the "Classpath" exception as provided
10 * by Oracle in the LICENSE file that accompanied this code.
11 *
12 * This code is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * version 2 for more details (a copy is included in the LICENSE file that
16 * accompanied this code).
17 *
18 * You should have received a copy of the GNU General Public License version
19 * 2 along with this work; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
21 *
22 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
23 * or visit www.oracle.com if you need additional information or have any
24 * questions.
25 */
26
27/*
28 * wrap_acos(x)
29 */
30
31#include "fdlibm.h"
32
33
34#ifdef __STDC__
35 double acos(double x) /* wrapper acos */
36#else
37 double acos(x) /* wrapper acos */
38 double x;
39#endif
40{
41#ifdef _IEEE_LIBM
42 return __ieee754_acos(x);
43#else
44 double z;
45 z = __ieee754_acos(x);
46 if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
47 if(fabs(x)>1.0) {
48 return __kernel_standard(x,x,1); /* acos(|x|>1) */
49 } else
50 return z;
51#endif
52}
53