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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT COMPILER COMPONENTS --
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4 -- --
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5 -- S Y S T E M . A D D R E S S _ O P E R A T I O N S --
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6 -- --
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7 -- B o d y --
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8 -- --
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9 -- Copyright (C) 2004-2017, Free Software Foundation, Inc. --
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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17 -- --
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18 -- As a special exception under Section 7 of GPL version 3, you are granted --
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19 -- additional permissions described in the GCC Runtime Library Exception, --
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20 -- version 3.1, as published by the Free Software Foundation. --
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21 -- --
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22 -- You should have received a copy of the GNU General Public License and --
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23 -- a copy of the GCC Runtime Library Exception along with this program; --
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24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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25 -- <http://www.gnu.org/licenses/>. --
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26 -- --
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27 -- GNAT was originally developed by the GNAT team at New York University. --
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28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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29 -- --
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30 ------------------------------------------------------------------------------
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31
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32 pragma Compiler_Unit_Warning;
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33
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34 with Ada.Unchecked_Conversion;
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35
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36 package body System.Address_Operations is
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37
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38 type IA is mod 2 ** Address'Size;
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39 -- The type used to provide the actual desired operations
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40
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41 function I is new Ada.Unchecked_Conversion (Address, IA);
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42 function A is new Ada.Unchecked_Conversion (IA, Address);
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43 -- The operations are implemented by unchecked conversion to type IA,
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44 -- followed by doing the intrinsic operation on the IA values, followed
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45 -- by converting the result back to type Address.
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46
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47 ----------
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48 -- AddA --
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49 ----------
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50
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51 function AddA (Left, Right : Address) return Address is
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52 begin
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53 return A (I (Left) + I (Right));
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54 end AddA;
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55
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56 ----------
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57 -- AndA --
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58 ----------
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59
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60 function AndA (Left, Right : Address) return Address is
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61 begin
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62 return A (I (Left) and I (Right));
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63 end AndA;
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64
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65 ----------
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66 -- DivA --
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67 ----------
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68
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69 function DivA (Left, Right : Address) return Address is
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70 begin
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71 return A (I (Left) / I (Right));
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72 end DivA;
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73
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74 ----------
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75 -- ModA --
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76 ----------
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77
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78 function ModA (Left, Right : Address) return Address is
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79 begin
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80 return A (I (Left) mod I (Right));
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81 end ModA;
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82
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83 ---------
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84 -- MulA --
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85 ---------
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86
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87 function MulA (Left, Right : Address) return Address is
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88 begin
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89 return A (I (Left) * I (Right));
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90 end MulA;
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91
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92 ---------
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93 -- OrA --
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94 ---------
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95
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96 function OrA (Left, Right : Address) return Address is
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97 begin
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98 return A (I (Left) or I (Right));
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99 end OrA;
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100
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101 ----------
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102 -- SubA --
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103 ----------
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104
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105 function SubA (Left, Right : Address) return Address is
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106 begin
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107 return A (I (Left) - I (Right));
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108 end SubA;
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109
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110 end System.Address_Operations;
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