1  /* file: lgamma.c */
       2  
       3  
       4  // Copyright (c) 2002 Intel Corporation
       5  // All rights reserved.
       6  //
       7  //
       8  // Redistribution and use in source and binary forms, with or without
       9  // modification, are permitted provided that the following conditions are
      10  // met:
      11  //
      12  // * Redistributions of source code must retain the above copyright
      13  // notice, this list of conditions and the following disclaimer.
      14  //
      15  // * Redistributions in binary form must reproduce the above copyright
      16  // notice, this list of conditions and the following disclaimer in the
      17  // documentation and/or other materials provided with the distribution.
      18  //
      19  // * The name of Intel Corporation may not be used to endorse or promote
      20  // products derived from this software without specific prior written
      21  // permission.
      22  
      23  //
      24  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      25  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      26  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      27  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR ITS
      28  // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
      29  // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
      30  // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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      32  // OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY OR TORT (INCLUDING
      33  // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
      34  // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      35  //
      36  // Intel Corporation is the author of this code, and requests that all
      37  // problem reports or change requests be submitted to it directly at
      38  // http://www.intel.com/software/products/opensource/libraries/num.htm.
      39  //
      40  //
      41  
      42  // History
      43  //==============================================================
      44  // 02/04/02: Initial version
      45  // 02/22/02: Removed lgammaf/gammaf
      46  //
      47  /*
      48  //   FUNCTIONS:    double  lgamma(double x)
      49  //                 double  gamma(double x)
      50  //                 Natural logarithm of GAMMA function
      51  */
      52  
      53  #include "libm_support.h"
      54  
      55  #include <math.h>
      56  #include <math_private.h>
      57  
      58  #include <lgamma-compat.h>
      59  
      60  extern double __libm_lgamma(double /*x*/, int* /*signgam*/, int /*signgamsz*/);
      61  
      62  #if BUILD_LGAMMA
      63  double LGFUNC (lgamma) (double x)
      64  {
      65      return CALL_LGAMMA (double, __libm_lgamma, x);
      66  }
      67  # if USE_AS_COMPAT
      68  compat_symbol (libm, __lgamma_compat, lgamma, LGAMMA_OLD_VER);
      69  # else
      70  versioned_symbol (libm, __ieee754_lgamma, lgamma, LGAMMA_NEW_VER);
      71  libm_alias_double_other (__ieee754_lgamma, lgamma)
      72  # endif
      73  # if GAMMA_ALIAS
      74  strong_alias (LGFUNC (lgamma), __ieee754_gamma)
      75  weak_alias (__ieee754_gamma, gamma)
      76  # endif
      77  #endif