gcc/ada/a-numaux-vms.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                     A D A . N U M E R I C S . A U X                      --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                             (VMS Version)                                --
   9 --                                                                          --
  10 --          Copyright (C) 2003-2011, Free Software Foundation, Inc.         --
  11 --                                                                          --
  12 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  13 -- terms of the  GNU General Public License as published  by the Free Soft- --
  14 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  15 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  16 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  17 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  18 --                                                                          --
  19 -- As a special exception under Section 7 of GPL version 3, you are granted --
  20 -- additional permissions described in the GCC Runtime Library Exception,   --
  21 -- version 3.1, as published by the Free Software Foundation.               --
  22 --                                                                          --
  23 -- You should have received a copy of the GNU General Public License and    --
  24 -- a copy of the GCC Runtime Library Exception along with this program;     --
  25 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  26 -- <http://www.gnu.org/licenses/>.                                          --
  27 --                                                                          --
  28 -- GNAT was originally developed  by the GNAT team at  New York University. --
  29 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  30 --                                                                          --
  31 ------------------------------------------------------------------------------
  32
  33 --  This package provides the basic computational interface for the generic
  34 --  elementary functions. The C library version interfaces with the routines
  35 --  in the C mathematical library, and is thus quite portable, although it may
  36 --  not necessarily meet the requirements for accuracy in the numerics annex.
  37
  38 --  This is the VMS version
  39
  40 package Ada.Numerics.Aux is
  41    pragma Pure;
  42
  43    type Double is digits 15;
  44    pragma Float_Representation (IEEE_Float, Double);
  45    --  Type Double is the type used to call the C routines. Note that this
  46    --  is IEEE format even when running on VMS with VAX_Native representation
  47    --  since we use the IEEE version of the C library with VMS.
  48
  49    --  We import these functions directly from C. Note that we label them
  50    --  all as pure functions, because indeed all of them are in fact pure!
  51
  52    function Sin (X : Double) return Double;
  53    pragma Import (C, Sin, "MATH$SIN_T");
  54    pragma Pure_Function (Sin);
  55
  56    function Cos (X : Double) return Double;
  57    pragma Import (C, Cos, "MATH$COS_T");
  58    pragma Pure_Function (Cos);
  59
  60    function Tan (X : Double) return Double;
  61    pragma Import (C, Tan, "MATH$TAN_T");
  62    pragma Pure_Function (Tan);
  63
  64    function Exp (X : Double) return Double;
  65    pragma Import (C, Exp, "MATH$EXP_T");
  66    pragma Pure_Function (Exp);
  67
  68    function Sqrt (X : Double) return Double;
  69    pragma Import (C, Sqrt, "MATH$SQRT_T");
  70    pragma Pure_Function (Sqrt);
  71
  72    function Log (X : Double) return Double;
  73    pragma Import (C, Log, "DECC$TLOG_2");
  74    pragma Pure_Function (Log);
  75
  76    function Acos (X : Double) return Double;
  77    pragma Import (C, Acos, "MATH$ACOS_T");
  78    pragma Pure_Function (Acos);
  79
  80    function Asin (X : Double) return Double;
  81    pragma Import (C, Asin, "MATH$ASIN_T");
  82    pragma Pure_Function (Asin);
  83
  84    function Atan (X : Double) return Double;
  85    pragma Import (C, Atan, "MATH$ATAN_T");
  86    pragma Pure_Function (Atan);
  87
  88    function Sinh (X : Double) return Double;
  89    pragma Import (C, Sinh, "MATH$SINH_T");
  90    pragma Pure_Function (Sinh);
  91
  92    function Cosh (X : Double) return Double;
  93    pragma Import (C, Cosh, "MATH$COSH_T");
  94    pragma Pure_Function (Cosh);
  95
  96    function Tanh (X : Double) return Double;
  97    pragma Import (C, Tanh, "MATH$TANH_T");
  98    pragma Pure_Function (Tanh);
  99
 100    function Pow (X, Y : Double) return Double;
 101    pragma Import (C, Pow, "DECC$TPOW_2");
 102    pragma Pure_Function (Pow);
 103
 104 end Ada.Numerics.Aux;