w_asin.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41


/* @(#)w_asin.c 1.3 95/01/18 */
/*
 * ====================================================
 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
 *
 * Developed at SunSoft, a Sun Microsystems, Inc. business.
 * Permission to use, copy, modify, and distribute this
 * software is freely granted, provided that this notice 
 * is preserved.
 * ====================================================
 *
 */

/* 
 * wrapper ieee_asin(x)
 */


#include "fdlibm.h"


#ifdef __STDC__
	double ieee_asin(double x)		/* wrapper asin */
#else
	double ieee_asin(x)			/* wrapper asin */
	double x;
#endif
{
#ifdef _IEEE_LIBM
	return __ieee754_asin(x);
#else
	double z;
	z = __ieee754_asin(x);
	if(_LIB_VERSION == _IEEE_ || ieee_isnan(x)) return z;
	if(ieee_fabs(x)>1.0) {
	        return __kernel_standard(x,x,2); /* ieee_asin(|x|>1) */
	} else
	    return z;
#endif
}