POK
j0f.c
1 /*
2  * POK header
3  *
4  * The following file is a part of the POK project. Any modification should
5  * made according to the POK licence. You CANNOT use this file or a part of
6  * this file is this part of a file for your own project
7  *
8  * For more information on the POK licence, please see our LICENCE FILE
9  *
10  * Please follow the coding guidelines described in doc/CODING_GUIDELINES
11  *
12  * Copyright (c) 2007-2009 POK team
13  *
14  * Created by julien on Fri Jan 30 14:41:34 2009
15  */
16 
17 /* w_j0f.c -- float version of w_j0.c.
18  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
19  */
20 
21 /*
22  * ====================================================
23  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
24  *
25  * Developed at SunPro, a Sun Microsystems, Inc. business.
26  * Permission to use, copy, modify, and distribute this
27  * software is freely granted, provided that this notice
28  * is preserved.
29  * ====================================================
30  */
31 
32 #ifdef POK_NEEDS_LIBMATH
33 
34 /*
35  * wrapper j0f(float x), y0f(float x)
36  */
37 
38 #include <libm.h>
39 #include "math_private.h"
40 
41 float
42 j0f(float x) /* wrapper j0f */
43 {
44 #ifdef _IEEE_LIBM
45  return __ieee754_j0f(x);
46 #else
47  float z = __ieee754_j0f(x);
48  if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;
49  if(fabsf(x)>(float)X_TLOSS) {
50  /* j0f(|x|>X_TLOSS) */
51  return (float)__kernel_standard((double)x,(double)x,134);
52  } else
53  return z;
54 #endif
55 }
56 
57 float
58 y0f(float x) /* wrapper y0f */
59 {
60 #ifdef _IEEE_LIBM
61  return __ieee754_y0f(x);
62 #else
63  float z;
64  z = __ieee754_y0f(x);
65  if(_LIB_VERSION == _IEEE_ || isnanf(x) ) return z;
66  if(x <= (float)0.0){
67  if(x==(float)0.0)
68  /* d= -one/(x-x); */
69  return (float)__kernel_standard((double)x,(double)x,108);
70  else
71  /* d = zero/(x-x); */
72  return (float)__kernel_standard((double)x,(double)x,109);
73  }
74  if(x>(float)X_TLOSS) {
75  /* y0(x>X_TLOSS) */
76  return (float)__kernel_standard((double)x,(double)x,135);
77  } else
78  return z;
79 #endif
80 }
81 
82 #endif