Remove last remnants of RANLIB
[glibc.git] / math / w_tgamma.c
blob976b5fb95c3619b91a8f9d56254371bb121a6ee2
1 /* @(#)w_gamma.c 5.1 93/09/24 */
2 /*
3 * ====================================================
4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
6 * Developed at SunPro, a Sun Microsystems, Inc. business.
7 * Permission to use, copy, modify, and distribute this
8 * software is freely granted, provided that this notice
9 * is preserved.
10 * ====================================================
13 /* double gamma(double x)
14 * Return the logarithm of the Gamma function of x or the Gamma function of x,
15 * depending on the library mode.
18 #include <math.h>
19 #include <math_private.h>
21 double
22 __tgamma(double x)
24 int local_signgam;
25 double y = __ieee754_gamma_r(x,&local_signgam);
27 if(__builtin_expect(!__finite(y), 0)&&__finite(x)
28 && _LIB_VERSION != _IEEE_) {
29 if (x == 0.0)
30 return __kernel_standard(x,x,50); /* tgamma pole */
31 else if(__floor(x)==x&&x<0.0)
32 return __kernel_standard(x,x,41); /* tgamma domain */
33 else
34 return __kernel_standard(x,x,40); /* tgamma overflow */
36 return local_signgam < 0 ? -y : y;
38 weak_alias (__tgamma, tgamma)
39 #ifdef NO_LONG_DOUBLE
40 strong_alias (__tgamma, __tgammal)
41 weak_alias (__tgamma, tgammal)
42 #endif