gcc/ada/interfac.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                           I N T E R F A C E S                            --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2002-2014, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- This specification is derived from the Ada Reference Manual for use with --
  12 -- GNAT. The copyright notice above, and the license provisions that follow --
  13 -- apply solely to the implementation dependent sections of this file.      --
  14 --                                                                          --
  15 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  16 -- terms of the  GNU General Public License as published  by the Free Soft- --
  17 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  18 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  19 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  20 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  21 --                                                                          --
  22 -- As a special exception under Section 7 of GPL version 3, you are granted --
  23 -- additional permissions described in the GCC Runtime Library Exception,   --
  24 -- version 3.1, as published by the Free Software Foundation.               --
  25 --                                                                          --
  26 -- You should have received a copy of the GNU General Public License and    --
  27 -- a copy of the GCC Runtime Library Exception along with this program;     --
  28 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  29 -- <http://www.gnu.org/licenses/>.                                          --
  30 --                                                                          --
  31 -- GNAT was originally developed  by the GNAT team at  New York University. --
  32 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 pragma Compiler_Unit_Warning;
  37
  38 package Interfaces is
  39    pragma Pure;
  40
  41    --  All identifiers in this unit are implementation defined
  42
  43    pragma Implementation_Defined;
  44
  45    type Integer_8  is range -2 **  7 .. 2 **  7 - 1;
  46    for Integer_8'Size use  8;
  47
  48    type Integer_16 is range -2 ** 15 .. 2 ** 15 - 1;
  49    for Integer_16'Size use 16;
  50
  51    type Integer_32 is range -2 ** 31 .. 2 ** 31 - 1;
  52    for Integer_32'Size use 32;
  53
  54    type Integer_64 is new Long_Long_Integer;
  55    for Integer_64'Size use 64;
  56    --  Note: we use Long_Long_Integer'First instead of -2 ** 63 to allow this
  57    --  unit to compile when using custom target configuration files where the
  58    --  maximum integer is 32 bits. This is useful for static analysis tools
  59    --  such as SPARK or CodePeer. In the normal case Long_Long_Integer is
  60    --  always 64-bits so we get the desired 64-bit type.
  61
  62    type Unsigned_8  is mod 2 ** 8;
  63    for Unsigned_8'Size use  8;
  64
  65    type Unsigned_16 is mod 2 ** 16;
  66    for Unsigned_16'Size use 16;
  67
  68    type Unsigned_32 is mod 2 ** 32;
  69    for Unsigned_32'Size use 32;
  70
  71    type Unsigned_64 is mod 2 ** Long_Long_Integer'Size;
  72    for Unsigned_64'Size use 64;
  73    --  See comment on Integer_64 above
  74
  75    function Shift_Left
  76      (Value  : Unsigned_8;
  77       Amount : Natural) return Unsigned_8;
  78
  79    function Shift_Right
  80      (Value  : Unsigned_8;
  81       Amount : Natural) return Unsigned_8;
  82
  83    function Shift_Right_Arithmetic
  84      (Value  : Unsigned_8;
  85       Amount : Natural) return Unsigned_8;
  86
  87    function Rotate_Left
  88      (Value  : Unsigned_8;
  89       Amount : Natural) return Unsigned_8;
  90
  91    function Rotate_Right
  92      (Value  : Unsigned_8;
  93       Amount : Natural) return Unsigned_8;
  94
  95    function Shift_Left
  96      (Value  : Unsigned_16;
  97       Amount : Natural) return Unsigned_16;
  98
  99    function Shift_Right
 100      (Value  : Unsigned_16;
 101       Amount : Natural) return Unsigned_16;
 102
 103    function Shift_Right_Arithmetic
 104      (Value  : Unsigned_16;
 105       Amount : Natural) return Unsigned_16;
 106
 107    function Rotate_Left
 108      (Value  : Unsigned_16;
 109       Amount : Natural) return Unsigned_16;
 110
 111    function Rotate_Right
 112      (Value  : Unsigned_16;
 113       Amount : Natural) return Unsigned_16;
 114
 115    function Shift_Left
 116      (Value  : Unsigned_32;
 117       Amount : Natural) return Unsigned_32;
 118
 119    function Shift_Right
 120      (Value  : Unsigned_32;
 121       Amount : Natural) return Unsigned_32;
 122
 123    function Shift_Right_Arithmetic
 124      (Value  : Unsigned_32;
 125       Amount : Natural) return Unsigned_32;
 126
 127    function Rotate_Left
 128      (Value  : Unsigned_32;
 129       Amount : Natural) return Unsigned_32;
 130
 131    function Rotate_Right
 132      (Value  : Unsigned_32;
 133       Amount : Natural) return Unsigned_32;
 134
 135    function Shift_Left
 136      (Value  : Unsigned_64;
 137       Amount : Natural) return Unsigned_64;
 138
 139    function Shift_Right
 140      (Value  : Unsigned_64;
 141       Amount : Natural) return Unsigned_64;
 142
 143    function Shift_Right_Arithmetic
 144      (Value  : Unsigned_64;
 145       Amount : Natural) return Unsigned_64;
 146
 147    function Rotate_Left
 148      (Value  : Unsigned_64;
 149       Amount : Natural) return Unsigned_64;
 150
 151    function Rotate_Right
 152      (Value  : Unsigned_64;
 153       Amount : Natural) return Unsigned_64;
 154
 155    pragma Import (Intrinsic, Shift_Left);
 156    pragma Import (Intrinsic, Shift_Right);
 157    pragma Import (Intrinsic, Shift_Right_Arithmetic);
 158    pragma Import (Intrinsic, Rotate_Left);
 159    pragma Import (Intrinsic, Rotate_Right);
 160
 161    --  IEEE Floating point types
 162
 163    type IEEE_Float_32 is digits 6;
 164    for IEEE_Float_32'Size use 32;
 165
 166    type IEEE_Float_64 is digits 15;
 167    for IEEE_Float_64'Size use 64;
 168
 169    --  If there is an IEEE extended float available on the machine, we assume
 170    --  that it is available as Long_Long_Float.
 171
 172    --  Note: it is harmless, and explicitly permitted, to include additional
 173    --  types in interfaces, so it is not wrong to have IEEE_Extended_Float
 174    --  defined even if the extended format is not available.
 175
 176    type IEEE_Extended_Float is new Long_Long_Float;
 177
 178 end Interfaces;