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) 2002-2011, 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
36package Interfaces is
37   pragma Pure;
38
39   --  All identifiers in this unit are implementation defined
40
41   pragma Implementation_Defined;
42
43   type Integer_8  is range -2 **  7 .. 2 **  7 - 1;
44   for Integer_8'Size use  8;
45
46   type Integer_16 is range -2 ** 15 .. 2 ** 15 - 1;
47   for Integer_16'Size use 16;
48
49   type Integer_32 is range -2 ** 31 .. 2 ** 31 - 1;
50   for Integer_32'Size use 32;
51
52   type Integer_64 is range -2 ** 63 .. 2 ** 63 - 1;
53   for Integer_64'Size use 64;
54
55   type Unsigned_8  is mod 2 **  8;
56   for Unsigned_8'Size use  8;
57
58   type Unsigned_16 is mod 2 ** 16;
59   for Unsigned_16'Size use 16;
60
61   type Unsigned_32 is mod 2 ** 32;
62   for Unsigned_32'Size use 32;
63
64   type Unsigned_64 is mod 2 ** 64;
65   for Unsigned_64'Size use 64;
66
67   function Shift_Left
68     (Value  : Unsigned_8;
69      Amount : Natural) return Unsigned_8;
70
71   function Shift_Right
72     (Value  : Unsigned_8;
73      Amount : Natural) return Unsigned_8;
74
75   function Shift_Right_Arithmetic
76     (Value  : Unsigned_8;
77      Amount : Natural) return Unsigned_8;
78
79   function Rotate_Left
80     (Value  : Unsigned_8;
81      Amount : Natural) return Unsigned_8;
82
83   function Rotate_Right
84     (Value  : Unsigned_8;
85      Amount : Natural) return Unsigned_8;
86
87   function Shift_Left
88     (Value  : Unsigned_16;
89      Amount : Natural) return Unsigned_16;
90
91   function Shift_Right
92     (Value  : Unsigned_16;
93      Amount : Natural) return Unsigned_16;
94
95   function Shift_Right_Arithmetic
96     (Value  : Unsigned_16;
97      Amount : Natural) return Unsigned_16;
98
99   function Rotate_Left
100     (Value  : Unsigned_16;
101      Amount : Natural) return Unsigned_16;
102
103   function Rotate_Right
104     (Value  : Unsigned_16;
105      Amount : Natural) return Unsigned_16;
106
107   function Shift_Left
108     (Value  : Unsigned_32;
109      Amount : Natural) return Unsigned_32;
110
111   function Shift_Right
112     (Value  : Unsigned_32;
113      Amount : Natural) return Unsigned_32;
114
115   function Shift_Right_Arithmetic
116     (Value  : Unsigned_32;
117      Amount : Natural) return Unsigned_32;
118
119   function Rotate_Left
120     (Value  : Unsigned_32;
121      Amount : Natural) return Unsigned_32;
122
123   function Rotate_Right
124     (Value  : Unsigned_32;
125      Amount : Natural) return Unsigned_32;
126
127   function Shift_Left
128     (Value  : Unsigned_64;
129      Amount : Natural) return Unsigned_64;
130
131   function Shift_Right
132     (Value  : Unsigned_64;
133      Amount : Natural) return Unsigned_64;
134
135   function Shift_Right_Arithmetic
136     (Value  : Unsigned_64;
137      Amount : Natural) return Unsigned_64;
138
139   function Rotate_Left
140     (Value  : Unsigned_64;
141      Amount : Natural) return Unsigned_64;
142
143   function Rotate_Right
144     (Value  : Unsigned_64;
145      Amount : Natural) return Unsigned_64;
146
147   pragma Import (Intrinsic, Shift_Left);
148   pragma Import (Intrinsic, Shift_Right);
149   pragma Import (Intrinsic, Shift_Right_Arithmetic);
150   pragma Import (Intrinsic, Rotate_Left);
151   pragma Import (Intrinsic, Rotate_Right);
152
153   --  IEEE Floating point types. Note that the form of these definitions
154   --  ensures that the work on VMS, even if the standard library is compiled
155   --  using a Float_Representation pragma for Vax_Float.
156
157   pragma Warnings (Off);
158   --  Turn off warnings for targets not providing IEEE floating-point types
159
160   type IEEE_Float_32 is digits 6;
161   pragma Float_Representation (IEEE_Float, IEEE_Float_32);
162
163   type IEEE_Float_64 is digits 15;
164   pragma Float_Representation (IEEE_Float, IEEE_Float_64);
165
166   --  If there is an IEEE extended float available on the machine, we assume
167   --  that it is available as Long_Long_Float.
168
169   --  Note: it is harmless, and explicitly permitted, to include additional
170   --  types in interfaces, so it is not wrong to have IEEE_Extended_Float
171   --  defined even if the extended format is not available.
172
173   type IEEE_Extended_Float is new Long_Long_Float;
174
175end Interfaces;
176