libm/w_lgammaf_r.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
  23 libm_hidden_proto(lgammaf_r)
  24 float
  25 lgammaf_r (float x, int *signgamp)
  26 {
  27 #if __UCLIBC_HAS_FENV__
  28         float y = (float) __ieee754_lgamma_r ((double)x,signgamp);
  29         if(__builtin_expect(!isfinite(y), 0)
  30            && isfinite(x) && _LIB_VERSION != _IEEE_)
  31                 return __kernel_standard_f(x, x,
  32                                            floorf(x)==x&&x<=0.0f
  33                                            ? 115 /* lgamma pole */
  34                                            : 114); /* lgamma overflow */
  35
  36         return y;
  37 #else
  38         return (float) __ieee754_lgamma_r ((double)x,signgamp);
  39 #endif
  40 }
  41 libm_hidden_def(lgammaf_r)