File : s-gccshi.ads
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- S Y S T E M . G C C . S H I F T S --
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 -- Ada implementation of libgcc: 64-bit shifts
33
34 pragma Restrictions (No_Elaboration_Code);
35
36 package System.GCC.Shifts is
37 pragma Pure;
38
39 function Lshrdi3 (Val : Unsigned_64; Count : Integer) return Unsigned_64;
40 pragma Export (C, Lshrdi3, "__lshrdi3");
41 -- Logical right rotation of Val by Count position. Return 0 if Count is
42 -- greater or equal than 64, and Val if less than 1.
43
44 function Ashrdi3 (Val : Unsigned_64; Count : Integer) return Unsigned_64;
45 pragma Export (C, Ashrdi3, "__ashrdi3");
46 -- Arithmetic right rotation of Val by Count position. Return 0 or -1 if
47 -- Count is greater or equal than 64, and Val if less than 1.
48
49 function Ashldi3 (Val : Unsigned_64; Count : Integer) return Unsigned_64;
50 pragma Export (C, Ashldi3, "__ashldi3");
51 -- Left rotation of Val by Count position. Return 0 if Count is greater or
52 -- equal than 64, and Val if less than 1.
53
54 end System.GCC.Shifts;