8d468fc04afdc979ba2b3b31801c1c1c7801e123
[dragonfly.git] / lib / msun / src / w_y0f.c
1 /* w_y0f.c -- float version of w_y0.c.
2  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3  *
4  * $FreeBSD: src/lib/msun/src/w_y0f.c,v 1.3 1999/08/28 00:07:10 peter Exp $
5  * $DragonFly: src/lib/msun/src/Attic/w_y0f.c,v 1.2 2003/06/17 04:26:53 dillon Exp $
6  */
7
8 /*
9  * ====================================================
10  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
11  *
12  * Developed at SunPro, a Sun Microsystems, Inc. business.
13  * Permission to use, copy, modify, and distribute this
14  * software is freely granted, provided that this notice
15  * is preserved.
16  * ====================================================
17  */
18
19 /*
20  * wrapper y0f(float x)
21  */
22
23 #include "math.h"
24 #include "math_private.h"
25
26 #ifdef __STDC__
27         float y0f(float x)              /* wrapper y0f */
28 #else
29         float y0f(x)                    /* wrapper y0f */
30         float x;
31 #endif
32 {
33 #ifdef _IEEE_LIBM
34         return __ieee754_y0f(x);
35 #else
36         float z;
37         z = __ieee754_y0f(x);
38         if(_LIB_VERSION == _IEEE_ || isnanf(x) ) return z;
39         if(x <= (float)0.0){
40                 if(x==(float)0.0)
41                     /* d= -one/(x-x); */
42                     return (float)__kernel_standard((double)x,(double)x,108);
43                 else
44                     /* d = zero/(x-x); */
45                     return (float)__kernel_standard((double)x,(double)x,109);
46         }
47         if(x>(float)X_TLOSS) {
48                 /* y0(x>X_TLOSS) */
49                 return (float)__kernel_standard((double)x,(double)x,135);
50         } else
51             return z;
52 #endif
53 }