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1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT RUN-TIME COMPONENTS --
4 -- --
5 -- S Y S T E M . P A C K _ 1 2 --
6 -- --
7 -- S p e c --
8 -- --
9 -- Copyright (C) 1992-2014, 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 3, 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. --
17 -- --
18 -- As a special exception under Section 7 of GPL version 3, you are granted --
19 -- additional permissions described in the GCC Runtime Library Exception, --
20 -- version 3.1, as published by the Free Software Foundation. --
21 -- --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
26 -- --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
29 -- --
30 ------------------------------------------------------------------------------
32 -- Handling of packed arrays with Component_Size = 12
34 package System.Pack_12 is
35 pragma Preelaborate;
37 Bits : constant := 12;
39 type Bits_12 is mod 2 ** Bits;
40 for Bits_12'Size use Bits;
42 -- In all subprograms below, Rev_SSO is set True if the array has the
43 -- non-default scalar storage order.
45 function Get_12
46 (Arr : System.Address;
47 N : Natural;
48 Rev_SSO : Boolean) return Bits_12 with Inline;
49 -- Arr is the address of the packed array, N is the zero-based
50 -- subscript. This element is extracted and returned.
52 procedure Set_12
53 (Arr : System.Address;
54 N : Natural;
55 E : Bits_12;
56 Rev_SSO : Boolean) with Inline;
57 -- Arr is the address of the packed array, N is the zero-based
58 -- subscript. This element is set to the given value.
60 function GetU_12
61 (Arr : System.Address;
62 N : Natural;
63 Rev_SSO : Boolean) return Bits_12 with Inline;
64 -- Arr is the address of the packed array, N is the zero-based
65 -- subscript. This element is extracted and returned. This version
66 -- is used when Arr may represent an unaligned address.
68 procedure SetU_12
69 (Arr : System.Address;
70 N : Natural;
71 E : Bits_12;
72 Rev_SSO : Boolean) with Inline;
73 -- Arr is the address of the packed array, N is the zero-based
74 -- subscript. This element is set to the given value. This version
75 -- is used when Arr may represent an unaligned address
77 end System.Pack_12;