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 --     Copyright (C) 1992,1993,1994,1995 Free Software Foundation, Inc.     --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  20 -- MA 02111-1307, USA.                                                      --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 --  This package contains the generic functions which are instantiated with
  35 --  predefined integer and real types to generate the runtime exponentiation
  36 --  functions called by expanded code generated by Expand_Op_Expon. This
  37 --  version of the package contains routines that are compiled with overflow
  38 --  checks enabled, so they are called for exponentiation operations which
  39 --  require overflow checking
  40
  41 package System.Exp_Gen is
  42 pragma Pure (System.Exp_Gen);
  43
  44    --  Exponentiation for float types (checks on)
  45
  46    generic
  47       type Type_Of_Base is digits <>;
  48
  49    function Exp_Float_Type
  50      (Left  : Type_Of_Base;
  51       Right : Integer)
  52       return  Type_Of_Base;
  53
  54    --  Exponentiation for signed integer types (checks on)
  55
  56    generic
  57       type Type_Of_Base is range <>;
  58
  59    function Exp_Integer_Type
  60      (Left  : Type_Of_Base;
  61       Right : Natural)
  62       return  Type_Of_Base;
  63
  64 end System.Exp_Gen;