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1 /* w_ynf.c -- float version of w_yn.c.
2  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3  */
4
5 /*
6  * ====================================================
7  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8  *
9  * Developed at SunPro, a Sun Microsystems, Inc. business.
10  * Permission to use, copy, modify, and distribute this
11  * software is freely granted, provided that this notice
12  * is preserved.
13  * ====================================================
14  */
15
16 #ifndef lint
17 static char rcsid[] = "$FreeBSD$";
18 #endif
19
20 #include "math.h"
21 #include "math_private.h"
22
23 float
24 ynf(int n, float x)     /* wrapper ynf */
25 {
26 #ifdef _IEEE_LIBM
27         return __ieee754_ynf(n,x);
28 #else
29         float z;
30         z = __ieee754_ynf(n,x);
31         if(_LIB_VERSION == _IEEE_ || isnanf(x) ) return z;
32         if(x <= (float)0.0){
33                 if(x==(float)0.0)
34                     /* d= -one/(x-x); */
35                     return (float)__kernel_standard((double)n,(double)x,112);
36                 else
37                     /* d = zero/(x-x); */
38                     return (float)__kernel_standard((double)n,(double)x,113);
39         }
40         if(x>(float)X_TLOSS) {
41             /* yn(x>X_TLOSS,n) */
42             return (float)__kernel_standard((double)n,(double)x,139);
43         } else
44             return z;
45 #endif
46 }