1 /* Copyright (C) 2011-2016 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19 #include <math.h>
20 #include "math_private.h"
21 #if defined(__UCLIBC_HAS_FENV__)
22 #include <fenv.h>
23 #endif
24 /* wrapper jn */
25 double
jn(int n,double x)26 jn (int n, double x)
27 {
28 #if defined(__UCLIBC_HAS_FENV__)
29 if (__builtin_expect (isgreater (fabs (x), X_TLOSS), 0)
30 && _LIB_VERSION != _IEEE_ && _LIB_VERSION != _POSIX_)
31 /* jn(n,|x|>X_TLOSS) */
32 return __kernel_standard (n, x, 38);
33 #endif /* __UCLIBC_HAS_FENV__ */
34 return __ieee754_jn (n, x);
35 }
36
37 /* wrapper yn */
38 double
yn(int n,double x)39 yn (int n, double x)
40 {
41 #if defined(__UCLIBC_HAS_FENV__)
42 if (__builtin_expect (islessequal (x, 0.0) || isgreater (x, X_TLOSS), 0)
43 && _LIB_VERSION != _IEEE_)
44 {
45 if (x < 0.0)
46 {
47 /* d = zero/(x-x) */
48 feraiseexcept (FE_INVALID);
49 return __kernel_standard (n, x, 13);
50 }
51 else if (x == 0.0)
52 {
53 /* d = -one/(x-x) */
54 feraiseexcept (FE_DIVBYZERO);
55 return __kernel_standard (n, x, 12);
56 }
57 else if (_LIB_VERSION != _POSIX_)
58 /* yn(n,x>X_TLOSS) */
59 return __kernel_standard (n, x, 39);
60 }
61 #endif /* __UCLIBC_HAS_FENV__ */
62 return __ieee754_yn (n, x);
63 }
64