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[glibc.git] / math / w_acos.c
blob5a1158ea7a8c695fb885b25f28b5f6245695cf70
1 /* @(#)w_acos.c 5.1 93/09/24 */
2 /*
3 * ====================================================
4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
6 * Developed at SunPro, a Sun Microsystems, Inc. business.
7 * Permission to use, copy, modify, and distribute this
8 * software is freely granted, provided that this notice
9 * is preserved.
10 * ====================================================
13 #if defined(LIBM_SCCS) && !defined(lint)
14 static char rcsid[] = "$NetBSD: w_acos.c,v 1.6 1995/05/10 20:48:26 jtc Exp $";
15 #endif
18 * wrap_acos(x)
21 #include "math.h"
22 #include "math_private.h"
25 #ifdef __STDC__
26 double __acos(double x) /* wrapper acos */
27 #else
28 double __acos(x) /* wrapper acos */
29 double x;
30 #endif
32 #ifdef _IEEE_LIBM
33 return __ieee754_acos(x);
34 #else
35 double z;
36 z = __ieee754_acos(x);
37 if(_LIB_VERSION == _IEEE_ || __isnan(x)) return z;
38 if(fabs(x)>1.0) {
39 return __kernel_standard(x,x,1); /* acos(|x|>1) */
40 } else
41 return z;
42 #endif
44 weak_alias (__acos, acos)
45 #ifdef NO_LONG_DOUBLE
46 strong_alias (__acos, __acosl)
47 weak_alias (__acos, acosl)
48 #endif