1 | /* w_lgammal.c -- long double version of w_lgamma.c. |
2 | * Conversion to long double by Ulrich Drepper, |
3 | * Cygnus Support, drepper@cygnus.com. |
4 | */ |
5 | |
6 | /* |
7 | * ==================================================== |
8 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
9 | * |
10 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
11 | * Permission to use, copy, modify, and distribute this |
12 | * software is freely granted, provided that this notice |
13 | * is preserved. |
14 | * ==================================================== |
15 | */ |
16 | |
17 | /* long double lgammal(long double x) |
18 | * Return the logarithm of the Gamma function of x. |
19 | * |
20 | * Method: call __ieee754_lgammal_r |
21 | */ |
22 | |
23 | #include <math.h> |
24 | #include <math_private.h> |
25 | #include <math-svid-compat.h> |
26 | #include <libm-alias-ldouble.h> |
27 | |
28 | #include <lgamma-compat.h> |
29 | |
30 | #if BUILD_LGAMMA |
31 | long double |
32 | LGFUNC (__lgammal) (long double x) |
33 | { |
34 | long double y = CALL_LGAMMA (long double, __ieee754_lgammal_r, x); |
35 | if(__builtin_expect(!isfinite(y), 0) |
36 | && isfinite(x) && _LIB_VERSION != _IEEE_) |
37 | return __kernel_standard_l(x, x, |
38 | floorl(x)==x&&x<=0.0L |
39 | ? 215 /* lgamma pole */ |
40 | : 214); /* lgamma overflow */ |
41 | |
42 | return y; |
43 | } |
44 | # if USE_AS_COMPAT |
45 | compat_symbol (libm, __lgammal_compat, lgammal, LGAMMA_OLD_VER); |
46 | # else |
47 | versioned_symbol (libm, __lgammal, lgammal, LGAMMA_NEW_VER); |
48 | libm_alias_ldouble_other (__lgamma, lgamma) |
49 | # endif |
50 | # if GAMMA_ALIAS |
51 | strong_alias (LGFUNC (__lgammal), __gammal) |
52 | weak_alias (__gammal, gammal) |
53 | # endif |
54 | #endif |
55 | |