libm/w_lgamma_r.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
  20 libm_hidden_proto(lgamma_r)
  21 double
  22 lgamma_r(double x, int *signgamp)
  23 {
  24 #if defined(__UCLIBC_HAS_FENV__)
  25         double y = __ieee754_lgamma_r(x,signgamp);
  26         if(__builtin_expect(!isfinite(y), 0)
  27            && isfinite(x) && _LIB_VERSION != _IEEE_)
  28                 return __kernel_standard(x, x,
  29                                          floor(x)==x&&x<=0.0
  30                                          ? 15 /* lgamma pole */
  31                                          : 14); /* lgamma overflow */
  32
  33         return y;
  34 #else
  35         return __ieee754_lgamma_r(x,signgamp);
  36 #endif /* __UCLIBC_HAS_FENV__ */
  37 }
  38 libm_hidden_def(lgamma_r)