projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| cc4f0de1 AC |
1 | ------------------------------------------------------------------------------ |
| 2 | -- -- | |
| 3 | -- GNAT COMPILER COMPONENTS -- | |
| 4 | -- -- | |
| 5 | -- S Y S T E M . A D D R E S S _ O P E R A T I O N S -- | |
| 6 | -- -- | |
| 7 | -- B o d y -- | |
| 8 | -- -- | |
| 748086b7 | 9 | -- Copyright (C) 2004-2009, Free Software Foundation, Inc. -- |
| cc4f0de1 AC |
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- -- | |
| 748086b7 | 13 | -- ware Foundation; either version 3, or (at your option) any later ver- -- |
| cc4f0de1 AC |
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 -- | |
| 748086b7 JJ |
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/>. -- | |
| cc4f0de1 AC |
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 | ||
| 2d9ea47f RD |
32 | pragma Warnings (Off); |
| 33 | pragma Compiler_Unit; | |
| 34 | pragma Warnings (On); | |
| 35 | ||
| cecaf88a | 36 | with Ada.Unchecked_Conversion; |
| cc4f0de1 AC |
37 | |
| 38 | package body System.Address_Operations is | |
| 39 | ||
| 40 | type IA is mod 2 ** Address'Size; | |
| 41 | -- The type used to provide the actual desired operations | |
| 42 | ||
| cecaf88a RD |
43 | function I is new Ada.Unchecked_Conversion (Address, IA); |
| 44 | function A is new Ada.Unchecked_Conversion (IA, Address); | |
| cc4f0de1 AC |
45 | -- The operations are implemented by unchecked conversion to type IA, |
| 46 | -- followed by doing the intrinsic operation on the IA values, followed | |
| 47 | -- by converting the result back to type Address. | |
| 48 | ||
| 49 | ---------- | |
| 50 | -- AddA -- | |
| 51 | ---------- | |
| 52 | ||
| 53 | function AddA (Left, Right : Address) return Address is | |
| 54 | begin | |
| 55 | return A (I (Left) + I (Right)); | |
| 56 | end AddA; | |
| 57 | ||
| 58 | ---------- | |
| 59 | -- AndA -- | |
| 60 | ---------- | |
| 61 | ||
| 62 | function AndA (Left, Right : Address) return Address is | |
| 63 | begin | |
| 64 | return A (I (Left) and I (Right)); | |
| 65 | end AndA; | |
| 66 | ||
| 67 | ---------- | |
| 68 | -- DivA -- | |
| 69 | ---------- | |
| 70 | ||
| 71 | function DivA (Left, Right : Address) return Address is | |
| 72 | begin | |
| 73 | return A (I (Left) / I (Right)); | |
| 74 | end DivA; | |
| 75 | ||
| 76 | ---------- | |
| 77 | -- ModA -- | |
| 78 | ---------- | |
| 79 | ||
| 80 | function ModA (Left, Right : Address) return Address is | |
| 81 | begin | |
| d935a36e | 82 | return A (I (Left) mod I (Right)); |
| cc4f0de1 AC |
83 | end ModA; |
| 84 | ||
| 85 | --------- | |
| 86 | -- MulA -- | |
| 87 | --------- | |
| 88 | ||
| 89 | function MulA (Left, Right : Address) return Address is | |
| 90 | begin | |
| 91 | return A (I (Left) * I (Right)); | |
| 92 | end MulA; | |
| 93 | ||
| 94 | --------- | |
| 95 | -- OrA -- | |
| 96 | --------- | |
| 97 | ||
| 98 | function OrA (Left, Right : Address) return Address is | |
| 99 | begin | |
| 100 | return A (I (Left) or I (Right)); | |
| 101 | end OrA; | |
| 102 | ||
| 103 | ---------- | |
| 104 | -- SubA -- | |
| 105 | ---------- | |
| 106 | ||
| 107 | function SubA (Left, Right : Address) return Address is | |
| 108 | begin | |
| 109 | return A (I (Left) - I (Right)); | |
| 110 | end SubA; | |
| 111 | ||
| 112 | end System.Address_Operations; |