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) 2002-2004 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 additions to thie 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,  59 Temple Place - Suite 330,  Boston, --
  24 -- MA 02111-1307, 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 --  Assumes integer sizes of 8, 16, 32 and 64 are available, and that the
  39 --  floating-point formats are IEEE compatible.
  40
  41 --  Note: There is a specialized version of this package for OpenVMS.
  42
  43 package Interfaces is
  44 pragma Pure (Interfaces);
  45
  46    type Integer_8  is range -2 **  7 .. 2 **  7 - 1;
  47    for Integer_8'Size use  8;
  48
  49    type Integer_16 is range -2 ** 15 .. 2 ** 15 - 1;
  50    for Integer_16'Size use 16;
  51
  52    type Integer_32 is range -2 ** 31 .. 2 ** 31 - 1;
  53    for Integer_32'Size use 32;
  54
  55    type Integer_64 is range -2 ** 63 .. 2 ** 63 - 1;
  56    for Integer_64'Size use 64;
  57
  58    type Unsigned_8  is mod 2 **  8;
  59    for Unsigned_8'Size use  8;
  60
  61    type Unsigned_16 is mod 2 ** 16;
  62    for Unsigned_16'Size use 16;
  63
  64    type Unsigned_32 is mod 2 ** 32;
  65    for Unsigned_32'Size use 32;
  66
  67    type Unsigned_64 is mod 2 ** 64;
  68    for Unsigned_64'Size use 64;
  69
  70    function Shift_Left
  71      (Value  : Unsigned_8;
  72       Amount : Natural) return Unsigned_8;
  73
  74    function Shift_Right
  75      (Value  : Unsigned_8;
  76       Amount : Natural) return Unsigned_8;
  77
  78    function Shift_Right_Arithmetic
  79      (Value  : Unsigned_8;
  80       Amount : Natural) return Unsigned_8;
  81
  82    function Rotate_Left
  83      (Value  : Unsigned_8;
  84       Amount : Natural) return Unsigned_8;
  85
  86    function Rotate_Right
  87      (Value  : Unsigned_8;
  88       Amount : Natural) return Unsigned_8;
  89
  90    function Shift_Left
  91      (Value  : Unsigned_16;
  92       Amount : Natural) return    Unsigned_16;
  93
  94    function Shift_Right
  95      (Value  : Unsigned_16;
  96       Amount : Natural) return Unsigned_16;
  97
  98    function Shift_Right_Arithmetic
  99      (Value  : Unsigned_16;
 100       Amount : Natural) return Unsigned_16;
 101
 102    function Rotate_Left
 103      (Value  : Unsigned_16;
 104       Amount : Natural) return Unsigned_16;
 105
 106    function Rotate_Right
 107      (Value  : Unsigned_16;
 108       Amount : Natural) return Unsigned_16;
 109
 110    function Shift_Left
 111      (Value  : Unsigned_32;
 112       Amount : Natural) return Unsigned_32;
 113
 114    function Shift_Right
 115      (Value  : Unsigned_32;
 116       Amount : Natural) return Unsigned_32;
 117
 118    function Shift_Right_Arithmetic
 119      (Value  : Unsigned_32;
 120       Amount : Natural) return Unsigned_32;
 121
 122    function Rotate_Left
 123      (Value  : Unsigned_32;
 124       Amount : Natural) return Unsigned_32;
 125
 126    function Rotate_Right
 127      (Value  : Unsigned_32;
 128       Amount : Natural) return Unsigned_32;
 129
 130    function Shift_Left
 131      (Value  : Unsigned_64;
 132       Amount : Natural) return Unsigned_64;
 133
 134    function Shift_Right
 135      (Value  : Unsigned_64;
 136       Amount : Natural) return Unsigned_64;
 137
 138    function Shift_Right_Arithmetic
 139      (Value  : Unsigned_64;
 140       Amount : Natural) return Unsigned_64;
 141
 142    function Rotate_Left
 143      (Value  : Unsigned_64;
 144       Amount : Natural) return Unsigned_64;
 145
 146    function Rotate_Right
 147      (Value  : Unsigned_64;
 148       Amount : Natural) return Unsigned_64;
 149
 150    pragma Import (Intrinsic, Shift_Left);
 151    pragma Import (Intrinsic, Shift_Right);
 152    pragma Import (Intrinsic, Shift_Right_Arithmetic);
 153    pragma Import (Intrinsic, Rotate_Left);
 154    pragma Import (Intrinsic, Rotate_Right);
 155
 156    --  Floating point types. We assume that we are on an IEEE machine, and
 157    --  that the types Short_Float and Long_Float in Standard refer to the
 158    --  32-bit short and 64-bit long IEEE forms. Furthermore, if there is
 159    --  an extended float, we assume that it is available as Long_Long_Float.
 160    --  Note: it is harmless, and explicitly permitted, to include additional
 161    --  types in interfaces, so it is not wrong to have IEEE_Extended_Float
 162    --  defined even if the extended format is not available.
 163
 164    type IEEE_Float_32       is new Short_Float;
 165    type IEEE_Float_64       is new Long_Float;
 166    type IEEE_Extended_Float is new Long_Long_Float;
 167
 168 end Interfaces;