gcc/ada/s-expgen.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUNTIME COMPONENTS                          --
   4 --                                                                          --
   5 --                       S Y S T E M . E X P _ G E N                         --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --                                                                          --
  10 --     Copyright (C) 1992,1993,1994,1995 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 2,  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.  See the GNU General Public License --
  18 -- for  more details.  You should have  received  a copy of the GNU General --
  19 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  20 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  21 -- MA 02111-1307, USA.                                                      --
  22 --                                                                          --
  23 -- As a special exception,  if other files  instantiate  generics from this --
  24 -- unit, or you link  this unit with other files  to produce an executable, --
  25 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  26 -- covered  by the  GNU  General  Public  License.  This exception does not --
  27 -- however invalidate  any other reasons why  the executable file  might be --
  28 -- covered by the  GNU Public License.                                      --
  29 --                                                                          --
  30 -- GNAT was originally developed  by the GNAT team at  New York University. --
  31 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  This package contains the generic functions which are instantiated with
  36 --  predefined integer and real types to generate the runtime exponentiation
  37 --  functions called by expanded code generated by Expand_Op_Expon. This
  38 --  version of the package contains routines that are compiled with overflow
  39 --  checks enabled, so they are called for exponentiation operations which
  40 --  require overflow checking
  41
  42 package System.Exp_Gen is
  43 pragma Pure (System.Exp_Gen);
  44
  45    --  Exponentiation for float types (checks on)
  46
  47    generic
  48       type Type_Of_Base is digits <>;
  49
  50    function Exp_Float_Type
  51      (Left  : Type_Of_Base;
  52       Right : Integer)
  53       return  Type_Of_Base;
  54
  55    --  Exponentiation for signed integer types (checks on)
  56
  57    generic
  58       type Type_Of_Base is range <>;
  59
  60    function Exp_Integer_Type
  61      (Left  : Type_Of_Base;
  62       Right : Natural)
  63       return  Type_Of_Base;
  64
  65 end System.Exp_Gen;