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--                                                                          --

--                         GNAT COMPILER COMPONENTS                         --

--                                                                          --

--                           I N T E R F A C E S                            --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--          Copyright (C) 2002-2005 Free Software Foundation, Inc.          --

--                                                                          --

-- This specification is derived from the Ada Reference Manual for use with --

-- GNAT. The copyright notice above, and the license provisions that follow --

-- apply solely to the implementation dependent sections of this file.      --

--                                                                          --

-- GNAT is free software;  you can  redistribute it  and/or modify it under --

-- terms of the  GNU General Public License as published  by the Free Soft- --

-- ware  Foundation;  either version 2,  or (at your option) any later ver- --

-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --

-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --

-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --

-- for  more details.  You should have  received  a copy of the GNU General --

-- Public License  distributed with GNAT;  see file COPYING.  If not, write --

-- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --

-- Boston, MA 02110-1301, USA.                                              --

--                                                                          --

-- As a special exception,  if other files  instantiate  generics from this --

-- unit, or you link  this unit with other files  to produce an executable, --

-- this  unit  does not  by itself cause  the resulting  executable  to  be --

-- covered  by the  GNU  General  Public  License.  This exception does not --

-- however invalidate  any other reasons why  the executable file  might be --

-- covered by the  GNU Public License.                                      --

--                                                                          --

-- GNAT was originally developed  by the GNAT team at  New York University. --

-- Extensive contributions were provided by Ada Core Technologies Inc.      --

--                                                                          --

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--  This is the OpenVMS version of this package which adds Float_Representation

--  pragmas to the IEEE floating point types to ensure they remain IEEE in

--  the presence of a configuration pragma Float_Representation (Vax_Float).

--  It assumes integer sizes of 8, 16, 32 and 64 are available, and that IEEE

--  floating-point formats are available.

package Interfaces is

   pragma Pure;

   type Integer_8  is range -2 **  7 .. 2 **  7 - 1;

   for Integer_8'Size use  8;

   type Integer_16 is range -2 ** 15 .. 2 ** 15 - 1;

   for Integer_16'Size use 16;

   type Integer_32 is range -2 ** 31 .. 2 ** 31 - 1;

   for Integer_32'Size use 32;

   type Integer_64 is range -2 ** 63 .. 2 ** 63 - 1;

   for Integer_64'Size use 64;

   type Unsigned_8  is mod 2 **  8;

   for Unsigned_8'Size use  8;

   type Unsigned_16 is mod 2 ** 16;

   for Unsigned_16'Size use 16;

   type Unsigned_32 is mod 2 ** 32;

   for Unsigned_32'Size use 32;

   type Unsigned_64 is mod 2 ** 64;

   for Unsigned_64'Size use 64;

   function Shift_Left

     (Value  : Unsigned_8;

      Amount : Natural) return Unsigned_8;

   function Shift_Right

     (Value  : Unsigned_8;

      Amount : Natural) return Unsigned_8;

   function Shift_Right_Arithmetic

     (Value  : Unsigned_8;

      Amount : Natural) return Unsigned_8;

   function Rotate_Left

     (Value  : Unsigned_8;

      Amount : Natural) return Unsigned_8;

   function Rotate_Right

     (Value  : Unsigned_8;

      Amount : Natural) return Unsigned_8;

   function Shift_Left

     (Value  : Unsigned_16;

      Amount : Natural) return Unsigned_16;

   function Shift_Right

     (Value  : Unsigned_16;

      Amount : Natural) return Unsigned_16;

   function Shift_Right_Arithmetic

     (Value  : Unsigned_16;

      Amount : Natural) return Unsigned_16;

   function Rotate_Left

     (Value  : Unsigned_16;

      Amount : Natural) return Unsigned_16;

   function Rotate_Right

     (Value  : Unsigned_16;

      Amount : Natural) return Unsigned_16;

   function Shift_Left

     (Value  : Unsigned_32;

      Amount : Natural) return Unsigned_32;

   function Shift_Right

     (Value  : Unsigned_32;

      Amount : Natural) return Unsigned_32;

   function Shift_Right_Arithmetic

     (Value  : Unsigned_32;

      Amount : Natural) return Unsigned_32;

   function Rotate_Left

     (Value  : Unsigned_32;

      Amount : Natural) return Unsigned_32;

   function Rotate_Right

     (Value  : Unsigned_32;

      Amount : Natural) return Unsigned_32;

   function Shift_Left

     (Value  : Unsigned_64;

      Amount : Natural) return Unsigned_64;

   function Shift_Right

     (Value  : Unsigned_64;

      Amount : Natural) return Unsigned_64;

   function Shift_Right_Arithmetic

     (Value  : Unsigned_64;

      Amount : Natural) return Unsigned_64;

   function Rotate_Left

     (Value  : Unsigned_64;

      Amount : Natural) return Unsigned_64;

   function Rotate_Right

     (Value  : Unsigned_64;

      Amount : Natural) return Unsigned_64;

   pragma Import (Intrinsic, Shift_Left);

   pragma Import (Intrinsic, Shift_Right);

   pragma Import (Intrinsic, Shift_Right_Arithmetic);

   pragma Import (Intrinsic, Rotate_Left);

   pragma Import (Intrinsic, Rotate_Right);

   --  Floating point types. We use the digits value to define the IEEE

   --  forms, otherwise a configuration pragma specifying VAX float can

   --  default the digits to an illegal value for IEEE.

   --  Note: it is harmless, and explicitly permitted, to include additional

   --  types in interfaces, so it is not wrong to have IEEE_Extended_Float

   --  defined even if the extended format is not available.

   type IEEE_Float_32       is digits 6;

   pragma Float_Representation (IEEE_Float, IEEE_Float_32);

   type IEEE_Float_64       is digits 15;

   pragma Float_Representation (IEEE_Float, IEEE_Float_64);

   type IEEE_Extended_Float is digits 15;

   pragma Float_Representation (IEEE_Float, IEEE_Extended_Float);

end Interfaces;