File : s-gcc.ads
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- S Y S T E M . G C C --
6 -- --
7 -- S p e c --
8 -- --
9 -- Copyright (C) 2013-2014, 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 -- --
19 -- --
20 -- --
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 ------------------------------------------------------------------------------
31
32 -- Parent package for Ada implementation of libgcc
33
34 pragma Restrictions (No_Elaboration_Code);
35
36 with Interfaces;
37
38 package System.GCC is
39 pragma Pure;
40
41 subtype Unsigned_64 is Interfaces.Unsigned_64;
42 subtype Integer_64 is Interfaces.Integer_64;
43 subtype Unsigned_32 is Interfaces.Unsigned_32;
44 -- Renaming to avoid full names in specifications
45
46 procedure Split
47 (Val : Unsigned_64;
48 Hi : out Unsigned_32;
49 Lo : out Unsigned_32);
50 pragma Inline (Split);
51 -- Extract the most significant word of Val to Hi and the least one to Lo.
52 -- The code generated by the compiler should be stand-alone and highly
53 -- efficient.
54
55 function Merge (Hi : Unsigned_32; Lo : Unsigned_32) return Unsigned_64;
56 pragma Inline (Merge);
57 -- Create an unsigned_64 from Hi and Lo. The code generated by the
58 -- compiler should be stand-alone and highly efficient.
59
60 end System.GCC;