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) 2002-2005, 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 2,  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.  See the GNU General Public License --
  21 -- for  more details.  You should have  received  a copy of the GNU General --
  22 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  23 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  24 -- Boston, MA 02110-1301, USA.                                              --
  25 --                                                                          --
  26 -- As a special exception,  if other files  instantiate  generics from this --
  27 -- unit, or you link  this unit with other files  to produce an executable, --
  28 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  29 -- covered  by the  GNU  General  Public  License.  This exception does not --
  30 -- however invalidate  any other reasons why  the executable file  might be --
  31 -- covered by the  GNU Public License.                                      --
  32 --                                                                          --
  33 -- GNAT was originally developed  by the GNAT team at  New York University. --
  34 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  35 --                                                                          --
  36 ------------------------------------------------------------------------------
  37
  38 package Interfaces is
  39    pragma Pure;
  40
  41    type Integer_8  is range -2 **  7 .. 2 **  7 - 1;
  42    for Integer_8'Size use  8;
  43
  44    type Integer_16 is range -2 ** 15 .. 2 ** 15 - 1;
  45    for Integer_16'Size use 16;
  46
  47    type Integer_32 is range -2 ** 31 .. 2 ** 31 - 1;
  48    for Integer_32'Size use 32;
  49
  50    type Integer_64 is range -2 ** 63 .. 2 ** 63 - 1;
  51    for Integer_64'Size use 64;
  52
  53    type Unsigned_8  is mod 2 **  8;
  54    for Unsigned_8'Size use  8;
  55
  56    type Unsigned_16 is mod 2 ** 16;
  57    for Unsigned_16'Size use 16;
  58
  59    type Unsigned_32 is mod 2 ** 32;
  60    for Unsigned_32'Size use 32;
  61
  62    type Unsigned_64 is mod 2 ** 64;
  63    for Unsigned_64'Size use 64;
  64
  65    function Shift_Left
  66      (Value  : Unsigned_8;
  67       Amount : Natural) return Unsigned_8;
  68
  69    function Shift_Right
  70      (Value  : Unsigned_8;
  71       Amount : Natural) return Unsigned_8;
  72
  73    function Shift_Right_Arithmetic
  74      (Value  : Unsigned_8;
  75       Amount : Natural) return Unsigned_8;
  76
  77    function Rotate_Left
  78      (Value  : Unsigned_8;
  79       Amount : Natural) return Unsigned_8;
  80
  81    function Rotate_Right
  82      (Value  : Unsigned_8;
  83       Amount : Natural) return Unsigned_8;
  84
  85    function Shift_Left
  86      (Value  : Unsigned_16;
  87       Amount : Natural) return Unsigned_16;
  88
  89    function Shift_Right
  90      (Value  : Unsigned_16;
  91       Amount : Natural) return Unsigned_16;
  92
  93    function Shift_Right_Arithmetic
  94      (Value  : Unsigned_16;
  95       Amount : Natural) return Unsigned_16;
  96
  97    function Rotate_Left
  98      (Value  : Unsigned_16;
  99       Amount : Natural) return Unsigned_16;
 100
 101    function Rotate_Right
 102      (Value  : Unsigned_16;
 103       Amount : Natural) return Unsigned_16;
 104
 105    function Shift_Left
 106      (Value  : Unsigned_32;
 107       Amount : Natural) return Unsigned_32;
 108
 109    function Shift_Right
 110      (Value  : Unsigned_32;
 111       Amount : Natural) return Unsigned_32;
 112
 113    function Shift_Right_Arithmetic
 114      (Value  : Unsigned_32;
 115       Amount : Natural) return Unsigned_32;
 116
 117    function Rotate_Left
 118      (Value  : Unsigned_32;
 119       Amount : Natural) return Unsigned_32;
 120
 121    function Rotate_Right
 122      (Value  : Unsigned_32;
 123       Amount : Natural) return Unsigned_32;
 124
 125    function Shift_Left
 126      (Value  : Unsigned_64;
 127       Amount : Natural) return Unsigned_64;
 128
 129    function Shift_Right
 130      (Value  : Unsigned_64;
 131       Amount : Natural) return Unsigned_64;
 132
 133    function Shift_Right_Arithmetic
 134      (Value  : Unsigned_64;
 135       Amount : Natural) return Unsigned_64;
 136
 137    function Rotate_Left
 138      (Value  : Unsigned_64;
 139       Amount : Natural) return Unsigned_64;
 140
 141    function Rotate_Right
 142      (Value  : Unsigned_64;
 143       Amount : Natural) return Unsigned_64;
 144
 145    pragma Import (Intrinsic, Shift_Left);
 146    pragma Import (Intrinsic, Shift_Right);
 147    pragma Import (Intrinsic, Shift_Right_Arithmetic);
 148    pragma Import (Intrinsic, Rotate_Left);
 149    pragma Import (Intrinsic, Rotate_Right);
 150
 151    --  IEEE Floating point types. Note that the form of these definitions
 152    --  ensures that the work on VMS, even if the standard library is compiled
 153    --  using a Float_Representation pragma for Vax_Float.
 154
 155    pragma Warnings (Off);
 156    --  Turn off warnings for targets not providing IEEE floating-point types
 157
 158    type IEEE_Float_32 is digits 6;
 159    pragma Float_Representation (IEEE_Float, IEEE_Float_32);
 160
 161    type IEEE_Float_64 is digits 15;
 162    pragma Float_Representation (IEEE_Float, IEEE_Float_64);
 163
 164    --  If there is an IEEE extended float available on the machine, we assume
 165    --  that it is available as Long_Long_Float.
 166
 167    --  Note: it is harmless, and explicitly permitted, to include additional
 168    --  types in interfaces, so it is not wrong to have IEEE_Extended_Float
 169    --  defined even if the extended format is not available.
 170
 171    type IEEE_Extended_Float is new Long_Long_Float;
 172
 173 end Interfaces;