sysdeps/ia64/fpu/w_lgamma.c

   1 /* file: lgamma.c */
   2
   3
   4 // Copyright (c) 2002 Intel Corporation
   5 // All rights reserved.
   6 //
   7 // Contributed 2002 by the Intel Numerics Group, Intel Corporation
   8 //
   9 // Redistribution and use in source and binary forms, with or without
  10 // modification, are permitted provided that the following conditions are
  11 // met:
  12 //
  13 // * Redistributions of source code must retain the above copyright
  14 // notice, this list of conditions and the following disclaimer.
  15 //
  16 // * Redistributions in binary form must reproduce the above copyright
  17 // notice, this list of conditions and the following disclaimer in the
  18 // documentation and/or other materials provided with the distribution.
  19 //
  20 // * The name of Intel Corporation may not be used to endorse or promote
  21 // products derived from this software without specific prior written
  22 // permission.
  23
  24 //
  25 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  26 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  27 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  28 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR ITS
  29 // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  30 // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  31 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  32 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  33 // OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY OR TORT (INCLUDING
  34 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36 //
  37 // Intel Corporation is the author of this code, and requests that all
  38 // problem reports or change requests be submitted to it directly at
  39 // http://www.intel.com/software/products/opensource/libraries/num.htm.
  40 //
  41 //
  42
  43 // History
  44 //==============================================================
  45 // 02/04/02: Initial version
  46 // 02/22/02: Removed lgammaf/gammaf
  47 //
  48 /*
  49 //   FUNCTIONS:    double  lgamma(double x)
  50 //                 double  gamma(double x)
  51 //                 Natural logarithm of GAMMA function
  52 */
  53
  54 #include "libm_support.h"
  55
  56
  57 extern double __libm_lgamma(double /*x*/, int* /*signgam*/, int /*signgamsz*/);
  58
  59
  60 double __ieee754_lgamma(double x)
  61 {
  62 #ifdef __POSIX__
  63     extern int    signgam;
  64 #else
  65     int    signgam;
  66 #endif
  67     return __libm_lgamma(x, &signgam, sizeof(signgam));
  68 }
  69 weak_alias (__ieee754_lgamma, lgamma)
  70
  71 double __ieee754_gamma(double x)
  72 {
  73 #ifdef __POSIX__
  74     extern int    signgam;
  75 #else
  76     int    signgam;
  77 #endif
  78     return __libm_lgamma(x, &signgam, sizeof(signgam));
  79 }
  80 weak_alias (__ieee754_gamma, gamma)