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1994-05-19
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6KB
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181 lines
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- I N T E R F A C E S --
-- --
-- S p e c --
-- --
-- $Revision: 1.4 $ --
-- --
-- Copyright (c) 1992,1993,1994 NYU, All Rights Reserved --
-- --
-- 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, 675 Mass Ave, Cambridge, MA 02139, USA. --
-- --
------------------------------------------------------------------------------
-- At the moment there is only one version of this source package available.
-- It assumes integer sizes of 8, 16, 32 and 64 are available, and that the
-- floating-point formats are IEEE compatible. Specialization of this file
-- may be required later if these assumptions are not correct for some target,
package Interfaces is
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 Convention (Intrinsic, Shift_Left);
pragma Convention (Intrinsic, Shift_Right);
pragma Convention (Intrinsic, Shift_Right_Arithmetic);
pragma Convention (Intrinsic, Rotate_Left);
pragma Convention (Intrinsic, Rotate_Right);
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 assume that we are on an IEEE machine, and
-- that the types Short_Float and Long_Float in Standard refer to the
-- 32-bit short and 64-bit long IEEE forms. Furthermore, if there is
-- an extended float, we assume that it is available as Long_Long_Float.
-- 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_Short_Float is new Short_Float;
type IEEE_Long_Float is new Long_Float;
type IEEE_Extended_Float is new Long_Long_Float;
end Interfaces;