math/w_lgamma_r_compat.c

   1 /* @(#)wr_lgamma.c 5.1 93/09/24 */
   2 /*
   3  * ====================================================
   4  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   5  *
   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  * ====================================================
  11  */
  12
  13 /*
  14  * wrapper double lgamma_r(double x, int *signgamp)
  15  */
  16
  17 #include <math.h>
  18 #include <math_private.h>
  19 #include <math-svid-compat.h>
  20 #include <libm-alias-double.h>
  21
  22
  23 #if LIBM_SVID_COMPAT
  24 double
  25 __lgamma_r(double x, int *signgamp)
  26 {
  27         double y = __ieee754_lgamma_r(x,signgamp);
  28         if(__builtin_expect(!isfinite(y), 0)
  29            && isfinite(x) && _LIB_VERSION != _IEEE_)
  30                 return __kernel_standard(x, x,
  31                                          __floor(x)==x&&x<=0.0
  32                                          ? 15 /* lgamma pole */
  33                                          : 14); /* lgamma overflow */
  34
  35         return y;
  36 }
  37 libm_alias_double_r (__lgamma, lgamma, _r)
  38 #endif