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/* @(#)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 <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
# 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
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