lib/libm/src/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 #include <sys/cdefs.h>
  17 #if defined(LIBM_SCCS) && !defined(lint)
  18 __RCSID("$NetBSD: w_lgammaf_r.c,v 1.7 2002/05/26 22:02:02 wiz Exp $");
  19 #endif
  20
  21 /*
  22  * wrapper float lgammaf_r(float x, int *signgamp)
  23  */
  24
  25 #include "math.h"
  26 #include "math_private.h"
  27
  28 float
  29 lgammaf_r(float x, int *signgamp) /* wrapper lgammaf_r */
  30 {
  31 #ifdef _IEEE_LIBM
  32         return __ieee754_lgammaf_r(x,signgamp);
  33 #else
  34         float y;
  35         y = __ieee754_lgammaf_r(x,signgamp);
  36         if(_LIB_VERSION == _IEEE_) return y;
  37         if(!finitef(y)&&finitef(x)) {
  38             if(floorf(x)==x&&x<=(float)0.0)
  39                 /* lgamma pole */
  40                 return (float)__kernel_standard((double)x,(double)x,115);
  41             else
  42                 /* lgamma overflow */
  43                 return (float)__kernel_standard((double)x,(double)x,114);
  44         } else
  45             return y;
  46 #endif
  47 }