newlib/libm/mathfp/erf_gamma.c

   1 /* erf_gamma.c -- float version of er_gamma.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 /* gammaf_r(x, signgamp)
  18  * Reentrant version of the logarithm of the Gamma function
  19  * with user provided pointer for the sign of Gamma(x).
  20  *
  21  * Method: See lgammaf_r
  22  */
  23
  24 #include "fdlibm.h"
  25
  26 #ifdef __STDC__
  27         float gammaf_r(float x, int *signgamp)
  28 #else
  29         float gammaf_r(x,signgamp)
  30         float x; int *signgamp;
  31 #endif
  32 {
  33         return expf (lgammaf_r(x,signgamp));
  34 }
  35
  36 float gammaf(float x)
  37 {
  38   return gammaf_r(x, &(_REENT_SIGNGAM(_REENT)));
  39 }