math/w_lgammaf_r_compat.c

   1 /* w_lgammaf_r.c -- float version of w_lgamma_r.c.
   2  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
   3  */
   4
   5 /*
   6  * ====================================================
   7  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   8  *
   9  * Developed at SunPro, a Sun Microsystems, Inc. business.
  10  * Permission to use, copy, modify, and distribute this
  11  * software is freely granted, provided that this notice
  12  * is preserved.
  13  * ====================================================
  14  */
  15
  16 /*
  17  * wrapper float lgammaf_r(float x, int *signgamp)
  18  */
  19
  20 #include <math.h>
  21 #include <math_private.h>
  22 #include <math-svid-compat.h>
  23 #include <libm-alias-float.h>
  24
  25
  26 #if LIBM_SVID_COMPAT
  27 float
  28 __lgammaf_r(float x, int *signgamp)
  29 {
  30         float y = __ieee754_lgammaf_r(x,signgamp);
  31         if(__builtin_expect(!isfinite(y), 0)
  32            && isfinite(x) && _LIB_VERSION != _IEEE_)
  33                 return __kernel_standard_f(x, x,
  34                                            floorf(x)==x&&x<=0.0f
  35                                            ? 115 /* lgamma pole */
  36                                            : 114); /* lgamma overflow */
  37
  38         return y;
  39 }
  40 libm_alias_float_r (__lgamma, lgamma, _r)
  41 #endif