POK
j1f.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_j1f.c -- float version of w_j1.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 of j1f,y1f
36  */
37 
38 #include <libm.h>
39 #include "math_private.h"
40 
41 float
42 j1f(float x) /* wrapper j1f */
43 {
44 #ifdef _IEEE_LIBM
45  return __ieee754_j1f(x);
46 #else
47  float z;
48  z = __ieee754_j1f(x);
49  if(_LIB_VERSION == _IEEE_ || isnanf(x) ) return z;
50  if(fabsf(x)>(float)X_TLOSS) {
51  /* j1(|x|>X_TLOSS) */
52  return (float)__kernel_standard((double)x,(double)x,136);
53  } else
54  return z;
55 #endif
56 }
57 
58 float
59 y1f(float x) /* wrapper y1f */
60 {
61 #ifdef _IEEE_LIBM
62  return __ieee754_y1f(x);
63 #else
64  float z;
65  z = __ieee754_y1f(x);
66  if(_LIB_VERSION == _IEEE_ || isnanf(x) ) return z;
67  if(x <= (float)0.0){
68  if(x==(float)0.0)
69  /* d= -one/(x-x); */
70  return (float)__kernel_standard((double)x,(double)x,110);
71  else
72  /* d = zero/(x-x); */
73  return (float)__kernel_standard((double)x,(double)x,111);
74  }
75  if(x>(float)X_TLOSS) {
76  /* y1(x>X_TLOSS) */
77  return (float)__kernel_standard((double)x,(double)x,137);
78  } else
79  return z;
80 #endif
81 }
82 
83 #endif