| /* @(#)w_lgamma.c 5.1 93/09/24 */ |
| /* |
| * ==================================================== |
| * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
| * |
| * Developed at SunPro, a Sun Microsystems, Inc. business. |
| * Permission to use, copy, modify, and distribute this |
| * software is freely granted, provided that this notice |
| * is preserved. |
| * ==================================================== |
| */ |
| |
| /* double lgamma(double x) |
| * Return the logarithm of the Gamma function of x. |
| * |
| * Method: call __ieee754_lgamma_r |
| */ |
| |
| #include <math.h> |
| #include <math_private.h> |
| |
| double |
| __lgamma(double x) |
| { |
| int local_signgam = 0; |
| double y = __ieee754_lgamma_r(x, |
| _LIB_VERSION != _ISOC_ |
| /* ISO C99 does not define the |
| global variable. */ |
| ? &signgam |
| : &local_signgam); |
| if(__builtin_expect(!__finite(y), 0) |
| && __finite(x) && _LIB_VERSION != _IEEE_) |
| return __kernel_standard(x, x, |
| __floor(x)==x&&x<=0.0 |
| ? 15 /* lgamma pole */ |
| : 14); /* lgamma overflow */ |
| |
| return y; |
| } |
| weak_alias (__lgamma, lgamma) |
| strong_alias (__lgamma, __gamma) |
| weak_alias (__gamma, gamma) |
| #ifdef NO_LONG_DOUBLE |
| strong_alias (__lgamma, __lgammal) |
| weak_alias (__lgamma, lgammal) |
| strong_alias (__gamma, __gammal) |
| weak_alias (__gamma, gammal) |
| #endif |
