1  /* w_lgammaf.c -- float version of w_lgamma.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  #include <math.h>
      16  #include <math_private.h>
      17  #include <math-svid-compat.h>
      18  #include <libm-alias-float.h>
      19  
      20  #include <lgamma-compat.h>
      21  
      22  #if BUILD_LGAMMA
      23  float
      24  LGFUNC (__lgammaf) (float x)
      25  {
      26  	float y = CALL_LGAMMA (float, __ieee754_lgammaf_r, x);
      27  	if(__builtin_expect(!isfinite(y), 0)
      28  	   && isfinite(x) && _LIB_VERSION != _IEEE_)
      29  		return __kernel_standard_f(x, x,
      30  					   floorf(x)==x&&x<=0.0f
      31  					   ? 115 /* lgamma pole */
      32  					   : 114); /* lgamma overflow */
      33  
      34  	return y;
      35  }
      36  # if USE_AS_COMPAT
      37  compat_symbol (libm, __lgammaf_compat, lgammaf, LGAMMA_OLD_VER);
      38  # else
      39  versioned_symbol (libm, __lgammaf, lgammaf, LGAMMA_NEW_VER);
      40  libm_alias_float_other (__lgamma, lgamma)
      41  # endif
      42  # if GAMMA_ALIAS
      43  strong_alias (LGFUNC (__lgammaf), __gammaf)
      44  weak_alias (__gammaf, gammaf)
      45  # endif
      46  #endif