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) 2002-2009, 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 package Interfaces is
  37    pragma Pure;
  38
  39    type Integer_8  is range -2 **  7 .. 2 **  7 - 1;
  40    for Integer_8'Size use  8;
  41
  42    type Integer_16 is range -2 ** 15 .. 2 ** 15 - 1;
  43    for Integer_16'Size use 16;
  44
  45    type Integer_32 is range -2 ** 31 .. 2 ** 31 - 1;
  46    for Integer_32'Size use 32;
  47
  48    type Integer_64 is range -2 ** 63 .. 2 ** 63 - 1;
  49    for Integer_64'Size use 64;
  50
  51    type Unsigned_8  is mod 2 **  8;
  52    for Unsigned_8'Size use  8;
  53
  54    type Unsigned_16 is mod 2 ** 16;
  55    for Unsigned_16'Size use 16;
  56
  57    type Unsigned_32 is mod 2 ** 32;
  58    for Unsigned_32'Size use 32;
  59
  60    type Unsigned_64 is mod 2 ** 64;
  61    for Unsigned_64'Size use 64;
  62
  63    function Shift_Left
  64      (Value  : Unsigned_8;
  65       Amount : Natural) return Unsigned_8;
  66
  67    function Shift_Right
  68      (Value  : Unsigned_8;
  69       Amount : Natural) return Unsigned_8;
  70
  71    function Shift_Right_Arithmetic
  72      (Value  : Unsigned_8;
  73       Amount : Natural) return Unsigned_8;
  74
  75    function Rotate_Left
  76      (Value  : Unsigned_8;
  77       Amount : Natural) return Unsigned_8;
  78
  79    function Rotate_Right
  80      (Value  : Unsigned_8;
  81       Amount : Natural) return Unsigned_8;
  82
  83    function Shift_Left
  84      (Value  : Unsigned_16;
  85       Amount : Natural) return Unsigned_16;
  86
  87    function Shift_Right
  88      (Value  : Unsigned_16;
  89       Amount : Natural) return Unsigned_16;
  90
  91    function Shift_Right_Arithmetic
  92      (Value  : Unsigned_16;
  93       Amount : Natural) return Unsigned_16;
  94
  95    function Rotate_Left
  96      (Value  : Unsigned_16;
  97       Amount : Natural) return Unsigned_16;
  98
  99    function Rotate_Right
 100      (Value  : Unsigned_16;
 101       Amount : Natural) return Unsigned_16;
 102
 103    function Shift_Left
 104      (Value  : Unsigned_32;
 105       Amount : Natural) return Unsigned_32;
 106
 107    function Shift_Right
 108      (Value  : Unsigned_32;
 109       Amount : Natural) return Unsigned_32;
 110
 111    function Shift_Right_Arithmetic
 112      (Value  : Unsigned_32;
 113       Amount : Natural) return Unsigned_32;
 114
 115    function Rotate_Left
 116      (Value  : Unsigned_32;
 117       Amount : Natural) return Unsigned_32;
 118
 119    function Rotate_Right
 120      (Value  : Unsigned_32;
 121       Amount : Natural) return Unsigned_32;
 122
 123    function Shift_Left
 124      (Value  : Unsigned_64;
 125       Amount : Natural) return Unsigned_64;
 126
 127    function Shift_Right
 128      (Value  : Unsigned_64;
 129       Amount : Natural) return Unsigned_64;
 130
 131    function Shift_Right_Arithmetic
 132      (Value  : Unsigned_64;
 133       Amount : Natural) return Unsigned_64;
 134
 135    function Rotate_Left
 136      (Value  : Unsigned_64;
 137       Amount : Natural) return Unsigned_64;
 138
 139    function Rotate_Right
 140      (Value  : Unsigned_64;
 141       Amount : Natural) return Unsigned_64;
 142
 143    pragma Import (Intrinsic, Shift_Left);
 144    pragma Import (Intrinsic, Shift_Right);
 145    pragma Import (Intrinsic, Shift_Right_Arithmetic);
 146    pragma Import (Intrinsic, Rotate_Left);
 147    pragma Import (Intrinsic, Rotate_Right);
 148
 149    --  IEEE Floating point types. Note that the form of these definitions
 150    --  ensures that the work on VMS, even if the standard library is compiled
 151    --  using a Float_Representation pragma for Vax_Float.
 152
 153    pragma Warnings (Off);
 154    --  Turn off warnings for targets not providing IEEE floating-point types
 155
 156    type IEEE_Float_32 is digits 6;
 157    pragma Float_Representation (IEEE_Float, IEEE_Float_32);
 158
 159    type IEEE_Float_64 is digits 15;
 160    pragma Float_Representation (IEEE_Float, IEEE_Float_64);
 161
 162    --  If there is an IEEE extended float available on the machine, we assume
 163    --  that it is available as Long_Long_Float.
 164
 165    --  Note: it is harmless, and explicitly permitted, to include additional
 166    --  types in interfaces, so it is not wrong to have IEEE_Extended_Float
 167    --  defined even if the extended format is not available.
 168
 169    type IEEE_Extended_Float is new Long_Long_Float;
 170
 171 end Interfaces;