1  /* w_lgammal.c -- long double version of w_lgamma.c.
       2   */
       3  
       4  /*
       5   * ====================================================
       6   * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
       7   *
       8   * Developed at SunPro, a Sun Microsystems, Inc. business.
       9   * Permission to use, copy, modify, and distribute this
      10   * software is freely granted, provided that this notice
      11   * is preserved.
      12   * ====================================================
      13   */
      14  
      15  /* long double lgammal(long double x)
      16   * Return the logarithm of the Gamma function of x.
      17   *
      18   * Method: call __ieee754_lgammal_r
      19   */
      20  
      21  #include <math.h>
      22  #include <math_private.h>
      23  #include <math-svid-compat.h>
      24  #include <libm-alias-ldouble.h>
      25  
      26  #include <lgamma-compat.h>
      27  
      28  #if BUILD_LGAMMA
      29  long double
      30  LGFUNC (__lgammal) (long double x)
      31  {
      32  	long double y = CALL_LGAMMA (long double, __ieee754_lgammal_r, x);
      33  	if(__builtin_expect(!isfinite(y), 0)
      34  	   && isfinite(x) && _LIB_VERSION != _IEEE_)
      35  		return __kernel_standard_l(x, x,
      36  					   floorl(x)==x&&x<=0.0L
      37  					   ? 215 /* lgamma pole */
      38  					   : 214); /* lgamma overflow */
      39  
      40  	return y;
      41  }
      42  # if USE_AS_COMPAT
      43  compat_symbol (libm, __lgammal_compat, lgammal, LGAMMA_OLD_VER);
      44  # else
      45  versioned_symbol (libm, __lgammal, lgammal, LGAMMA_NEW_VER);
      46  libm_alias_ldouble_other (__lgamma, lgamma)
      47  # endif
      48  # if GAMMA_ALIAS
      49  strong_alias (LGFUNC (__lgammal), __gammal)
      50  weak_alias (__gammal, gammal)
      51  # endif
      52  #endif