math/w_lgammaf_r_compat.c

   1 /* w_lgammaf_r.c -- float version of w_lgamma_r.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 /*
  16  * wrapper float lgammaf_r(float x, int *signgamp)
  17  */
  18
  19 #include <math.h>
  20 #include <math_private.h>
  21 #include <math-svid-compat.h>
  22 #include <libm-alias-float.h>
  23
  24
  25 #if LIBM_SVID_COMPAT
  26 float
  27 __lgammaf_r(float x, int *signgamp)
  28 {
  29         float y = __ieee754_lgammaf_r(x,signgamp);
  30         if(__builtin_expect(!isfinite(y), 0)
  31            && isfinite(x) && _LIB_VERSION != _IEEE_)
  32                 return __kernel_standard_f(x, x,
  33                                            floorf(x)==x&&x<=0.0f
  34                                            ? 115 /* lgamma pole */
  35                                            : 114); /* lgamma overflow */
  36
  37         return y;
  38 }
  39 libm_alias_float_r (__lgamma, lgamma, _r)
  40 #endif