projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| ee188d55 RM |
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 | #if defined(LIBM_SCCS) && !defined(lint) | |
| 18 | static char rcsid[] = "$NetBSD: $"; | |
| 19 | #endif | |
| 20 | ||
| 21 | /* long double lgammal(long double x) | |
| 22 | * Return the logarithm of the Gamma function of x. | |
| 23 | * | |
| 24 | * Method: call __ieee754_lgammal_r | |
| 25 | */ | |
| 26 | ||
| 27 | #include "math.h" | |
| 28 | #include "math_private.h" | |
| 29 | ||
| ee188d55 RM |
30 | #ifdef __STDC__ |
| 31 | long double __lgammal(long double x) | |
| 32 | #else | |
| 33 | long double __lgammal(x) | |
| 34 | long double x; | |
| 35 | #endif | |
| 36 | { | |
| 37 | #ifdef _IEEE_LIBM | |
| b9337b6a | 38 | return __ieee754_lgammal_r(x,&signgam); |
| ee188d55 RM |
39 | #else |
| 40 | long double y; | |
| b9337b6a UD |
41 | int local_signgam; |
| 42 | y = __ieee754_lgammal_r(x,&local_signgam); | |
| 43 | if (_LIB_VERSION != _ISOC_) | |
| 44 | /* ISO C 9x does not define the global variable. */ | |
| 45 | signgam = local_signgam; | |
| ee188d55 RM |
46 | if(_LIB_VERSION == _IEEE_) return y; |
| 47 | if(!__finitel(y)&&__finitel(x)) { | |
| 48 | if(__floorl(x)==x&&x<=0.0) | |
| 49 | return __kernel_standard(x,x,215); /* lgamma pole */ | |
| 50 | else | |
| 51 | return __kernel_standard(x,x,214); /* lgamma overflow */ | |
| 52 | } else | |
| 53 | return y; | |
| 54 | #endif | |
| 55 | } | |
| 56 | weak_alias (__lgammal, lgammal) | |
| e852e889 UD |
57 | strong_alias (__lgammal, __gammal) |
| 58 | weak_alias (__gammal, gammal) |