-- --
-- S p e c --
-- --
--- Copyright (C) 1992-2005 Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
-- --
-- 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- --
+-- ware Foundation; either version 3, 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. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
--- 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. --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
------------------------------------------------------------------------------
-- This package contains definitions of standard unsigned types that
--- correspond in size to the standard signed types declared in Standard.
+-- correspond in size to the standard signed types declared in Standard,
-- and (unlike the types in Interfaces) have corresponding names. It
-- also contains some related definitions for other specialized types
-- used by the compiler in connection with packed array types.
+pragma Warnings (Off);
+pragma Compiler_Unit;
+pragma Warnings (On);
+
package System.Unsigned_Types is
-pragma Pure (Unsigned_Types);
+ pragma Pure;
type Short_Short_Unsigned is mod 2 ** Short_Short_Integer'Size;
type Short_Unsigned is mod 2 ** Short_Integer'Size;
type Packed_Byte is mod 2 ** 8;
for Packed_Byte'Size use 8;
- -- Component type for Packed_Butes array
+ -- Component type for Packed_Bytes array
type Packed_Bytes1 is array (Natural range <>) of Packed_Byte;
for Packed_Bytes1'Alignment use 1;
-- for details.
type Packed_Bytes2 is new Packed_Bytes1;
- for Packed_Bytes2'Alignment use 2;
+ for Packed_Bytes2'Alignment use Integer'Min (2, Standard'Maximum_Alignment);
-- This is the type used to implement packed arrays where an alignment
- -- of 2 is helpful for maximum efficiency of the get and set routines
- -- in the corresponding library unit. This is true of all component
- -- sizes that are even but not divisible by 4 (other than 2 for which
- -- we use direct masking operations). In such cases, the clusters can
- -- be assumed to be 2-byte aligned if the array is aligned. See for
+ -- of 2 (is possible) is helpful for maximum efficiency of the get and
+ -- set routines in the corresponding library unit. This is true of all
+ -- component sizes that are even but not divisible by 4 (other than 2 for
+ -- which we use direct masking operations). In such cases, the clusters
+ -- can be assumed to be 2-byte aligned if the array is aligned. See for
-- example System.Pack_10 in file s-pack10).
type Packed_Bytes4 is new Packed_Bytes1;
for Packed_Bytes4'Alignment use Integer'Min (4, Standard'Maximum_Alignment);
-- This is the type used to implement packed arrays where an alignment
- -- of 4 is helpful for maximum efficiency of the get and set routines
- -- in the corresponding library unit. This is true of all component
- -- sizes that are divisible by 4 (other than powers of 2, which are
- -- either handled by direct masking or not packed at all). In such cases
- -- the clusters can be assumed to be 4-byte aligned if the array is
- -- aligned (see System.Pack_12 in file s-pack12 as an example).
+ -- of 4 (if possible) is helpful for maximum efficiency of the get and
+ -- set routines in the corresponding library unit. This is true of all
+ -- component sizes that are divisible by 4 (other than powers of 2, which
+ -- are either handled by direct masking or not packed at all). In such
+ -- cases the clusters can be assumed to be 4-byte aligned if the array
+ -- is aligned (see System.Pack_12 in file s-pack12 as an example).
type Bits_1 is mod 2**1;
type Bits_2 is mod 2**2;
function Shift_Left
(Value : Short_Short_Unsigned;
- Amount : Natural)
- return Short_Short_Unsigned;
+ Amount : Natural) return Short_Short_Unsigned;
function Shift_Right
(Value : Short_Short_Unsigned;
- Amount : Natural)
- return Short_Short_Unsigned;
+ Amount : Natural) return Short_Short_Unsigned;
function Shift_Right_Arithmetic
(Value : Short_Short_Unsigned;
- Amount : Natural)
- return Short_Short_Unsigned;
+ Amount : Natural) return Short_Short_Unsigned;
function Rotate_Left
(Value : Short_Short_Unsigned;
- Amount : Natural)
- return Short_Short_Unsigned;
+ Amount : Natural) return Short_Short_Unsigned;
function Rotate_Right
(Value : Short_Short_Unsigned;
- Amount : Natural)
- return Short_Short_Unsigned;
+ Amount : Natural) return Short_Short_Unsigned;
function Shift_Left
(Value : Short_Unsigned;
- Amount : Natural)
- return Short_Unsigned;
+ Amount : Natural) return Short_Unsigned;
function Shift_Right
(Value : Short_Unsigned;
- Amount : Natural)
- return Short_Unsigned;
+ Amount : Natural) return Short_Unsigned;
function Shift_Right_Arithmetic
(Value : Short_Unsigned;
- Amount : Natural)
- return Short_Unsigned;
+ Amount : Natural) return Short_Unsigned;
function Rotate_Left
(Value : Short_Unsigned;
- Amount : Natural)
- return Short_Unsigned;
+ Amount : Natural) return Short_Unsigned;
function Rotate_Right
(Value : Short_Unsigned;
- Amount : Natural)
- return Short_Unsigned;
+ Amount : Natural) return Short_Unsigned;
function Shift_Left
(Value : Unsigned;
- Amount : Natural)
- return Unsigned;
+ Amount : Natural) return Unsigned;
function Shift_Right
(Value : Unsigned;
- Amount : Natural)
- return Unsigned;
+ Amount : Natural) return Unsigned;
function Shift_Right_Arithmetic
(Value : Unsigned;
- Amount : Natural)
- return Unsigned;
+ Amount : Natural) return Unsigned;
function Rotate_Left
(Value : Unsigned;
- Amount : Natural)
- return Unsigned;
+ Amount : Natural) return Unsigned;
function Rotate_Right
(Value : Unsigned;
- Amount : Natural)
- return Unsigned;
+ Amount : Natural) return Unsigned;
function Shift_Left
(Value : Long_Unsigned;
- Amount : Natural)
- return Long_Unsigned;
+ Amount : Natural) return Long_Unsigned;
function Shift_Right
(Value : Long_Unsigned;
- Amount : Natural)
- return Long_Unsigned;
+ Amount : Natural) return Long_Unsigned;
function Shift_Right_Arithmetic
(Value : Long_Unsigned;
- Amount : Natural)
- return Long_Unsigned;
+ Amount : Natural) return Long_Unsigned;
function Rotate_Left
(Value : Long_Unsigned;
- Amount : Natural)
- return Long_Unsigned;
+ Amount : Natural) return Long_Unsigned;
function Rotate_Right
(Value : Long_Unsigned;
- Amount : Natural)
- return Long_Unsigned;
+ Amount : Natural) return Long_Unsigned;
function Shift_Left
(Value : Long_Long_Unsigned;
- Amount : Natural)
- return Long_Long_Unsigned;
+ Amount : Natural) return Long_Long_Unsigned;
function Shift_Right
(Value : Long_Long_Unsigned;
- Amount : Natural)
- return Long_Long_Unsigned;
+ Amount : Natural) return Long_Long_Unsigned;
function Shift_Right_Arithmetic
(Value : Long_Long_Unsigned;
- Amount : Natural)
- return Long_Long_Unsigned;
+ Amount : Natural) return Long_Long_Unsigned;
function Rotate_Left
(Value : Long_Long_Unsigned;
- Amount : Natural)
- return Long_Long_Unsigned;
+ Amount : Natural) return Long_Long_Unsigned;
function Rotate_Right
(Value : Long_Long_Unsigned;
- Amount : Natural)
- return Long_Long_Unsigned;
+ Amount : Natural) return Long_Long_Unsigned;
pragma Import (Intrinsic, Shift_Left);
pragma Import (Intrinsic, Shift_Right);
pragma Import (Intrinsic, Rotate_Left);
pragma Import (Intrinsic, Rotate_Right);
- -- The following definitions are obsolsecent. They were needed by the
+ -- The following definitions are obsolescent. They were needed by the
-- previous version of the compiler and runtime, but are not needed
-- by the current version. We retain them to help with bootstrap path
-- problems. Also they seem harmless, and if any user programs have
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