| /* @(#)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> |
| #include <math-svid-compat.h> |
| #include <libm-alias-double.h> |
| |
| #include <lgamma-compat.h> |
| |
| #if BUILD_LGAMMA |
| double |
| LGFUNC (__lgamma) (double x) |
| { |
| double y = CALL_LGAMMA (double, __ieee754_lgamma_r, x); |
| if(__builtin_expect(!isfinite(y), 0) |
| && isfinite(x) && _LIB_VERSION != _IEEE_) |
| return __kernel_standard(x, x, |
| __floor(x)==x&&x<=0.0 |
| ? 15 /* lgamma pole */ |
| : 14); /* lgamma overflow */ |
| |
| return y; |
| } |
| # if USE_AS_COMPAT |
| compat_symbol (libm, __lgamma_compat, lgamma, LGAMMA_OLD_VER); |
| # ifdef NO_LONG_DOUBLE |
| strong_alias (__lgamma_compat, __lgammal_compat) |
| compat_symbol (libm, __lgammal_compat, lgammal, LGAMMA_OLD_VER); |
| # endif |
| # else |
| versioned_symbol (libm, __lgamma, lgamma, LGAMMA_NEW_VER); |
| # ifdef NO_LONG_DOUBLE |
| strong_alias (__lgamma, __lgammal) |
| versioned_symbol (libm, __lgammal, lgammal, LGAMMA_NEW_VER); |
| # endif |
| libm_alias_double_other (__lgamma, lgamma) |
| # endif |
| # if GAMMA_ALIAS |
| strong_alias (LGFUNC (__lgamma), __gamma) |
| weak_alias (__gamma, gamma) |
| # ifdef NO_LONG_DOUBLE |
| strong_alias (__gamma, __gammal) |
| weak_alias (__gamma, gammal) |
| # endif |
| # endif |
| #endif |
