Add the DragonFly cvs id and perform general cleanups on cvs/rcs/sccs ids. Most
[dragonfly.git] / lib / msun / src / w_yn.c
1 /* from: @(#)w_jn.c 5.1 93/09/24 */
2 /*
3  * ====================================================
4  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
5  *
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  * ====================================================
11  *
12  * $FreeBSD: src/lib/msun/src/w_yn.c,v 1.3 1999/08/28 00:07:11 peter Exp $
13  * $DragonFly: src/lib/msun/src/Attic/w_yn.c,v 1.2 2003/06/17 04:26:54 dillon Exp $
14  */
15
16 /*
17  * wrapper yn(int n, double x)
18  */
19
20 #include "math.h"
21 #include "math_private.h"
22
23 #ifdef __STDC__
24         double yn(int n, double x)      /* wrapper yn */
25 #else
26         double yn(n,x)                  /* wrapper yn */
27         double x; int n;
28 #endif
29 {
30 #ifdef _IEEE_LIBM
31         return __ieee754_yn(n,x);
32 #else
33         double z;
34         z = __ieee754_yn(n,x);
35         if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
36         if(x <= 0.0){
37                 if(x==0.0)
38                     /* d= -one/(x-x); */
39                     return __kernel_standard((double)n,x,12);
40                 else
41                     /* d = zero/(x-x); */
42                     return __kernel_standard((double)n,x,13);
43         }
44         if(x>X_TLOSS) {
45             return __kernel_standard((double)n,x,39); /* yn(x>X_TLOSS,n) */
46         } else
47             return z;
48 #endif
49 }