1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- I N T E R F A C E S --
9 -- Copyright (C) 2002-2005 Free Software Foundation, Inc. --
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. --
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. --
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. --
33 -- GNAT was originally developed by the GNAT team at New York University. --
34 -- Extensive contributions were provided by Ada Core Technologies Inc. --
36 ------------------------------------------------------------------------------
38 -- This is the OpenVMS version of this package which adds Float_Representation
39 -- pragmas to the IEEE floating point types to ensure they remain IEEE in
40 -- the presence of a configuration pragma Float_Representation (Vax_Float).
42 -- It assumes integer sizes of 8, 16, 32 and 64 are available, and that IEEE
43 -- floating-point formats are available.
48 type Integer_8
is range -2 ** 7 .. 2 ** 7 - 1;
49 for Integer_8
'Size use 8;
51 type Integer_16
is range -2 ** 15 .. 2 ** 15 - 1;
52 for Integer_16
'Size use 16;
54 type Integer_32
is range -2 ** 31 .. 2 ** 31 - 1;
55 for Integer_32
'Size use 32;
57 type Integer_64
is range -2 ** 63 .. 2 ** 63 - 1;
58 for Integer_64
'Size use 64;
60 type Unsigned_8
is mod 2 ** 8;
61 for Unsigned_8
'Size use 8;
63 type Unsigned_16
is mod 2 ** 16;
64 for Unsigned_16
'Size use 16;
66 type Unsigned_32
is mod 2 ** 32;
67 for Unsigned_32
'Size use 32;
69 type Unsigned_64
is mod 2 ** 64;
70 for Unsigned_64
'Size use 64;
74 Amount
: Natural) return Unsigned_8
;
78 Amount
: Natural) return Unsigned_8
;
80 function Shift_Right_Arithmetic
82 Amount
: Natural) return Unsigned_8
;
86 Amount
: Natural) return Unsigned_8
;
90 Amount
: Natural) return Unsigned_8
;
94 Amount
: Natural) return Unsigned_16
;
98 Amount
: Natural) return Unsigned_16
;
100 function Shift_Right_Arithmetic
101 (Value
: Unsigned_16
;
102 Amount
: Natural) return Unsigned_16
;
105 (Value
: Unsigned_16
;
106 Amount
: Natural) return Unsigned_16
;
108 function Rotate_Right
109 (Value
: Unsigned_16
;
110 Amount
: Natural) return Unsigned_16
;
113 (Value
: Unsigned_32
;
114 Amount
: Natural) return Unsigned_32
;
117 (Value
: Unsigned_32
;
118 Amount
: Natural) return Unsigned_32
;
120 function Shift_Right_Arithmetic
121 (Value
: Unsigned_32
;
122 Amount
: Natural) return Unsigned_32
;
125 (Value
: Unsigned_32
;
126 Amount
: Natural) return Unsigned_32
;
128 function Rotate_Right
129 (Value
: Unsigned_32
;
130 Amount
: Natural) return Unsigned_32
;
133 (Value
: Unsigned_64
;
134 Amount
: Natural) return Unsigned_64
;
137 (Value
: Unsigned_64
;
138 Amount
: Natural) return Unsigned_64
;
140 function Shift_Right_Arithmetic
141 (Value
: Unsigned_64
;
142 Amount
: Natural) return Unsigned_64
;
145 (Value
: Unsigned_64
;
146 Amount
: Natural) return Unsigned_64
;
148 function Rotate_Right
149 (Value
: Unsigned_64
;
150 Amount
: Natural) return Unsigned_64
;
152 pragma Import
(Intrinsic
, Shift_Left
);
153 pragma Import
(Intrinsic
, Shift_Right
);
154 pragma Import
(Intrinsic
, Shift_Right_Arithmetic
);
155 pragma Import
(Intrinsic
, Rotate_Left
);
156 pragma Import
(Intrinsic
, Rotate_Right
);
158 -- Floating point types. We use the digits value to define the IEEE
159 -- forms, otherwise a configuration pragma specifying VAX float can
160 -- default the digits to an illegal value for IEEE.
162 -- Note: it is harmless, and explicitly permitted, to include additional
163 -- types in interfaces, so it is not wrong to have IEEE_Extended_Float
164 -- defined even if the extended format is not available.
166 type IEEE_Float_32
is digits 6;
167 pragma Float_Representation
(IEEE_Float
, IEEE_Float_32
);
169 type IEEE_Float_64
is digits 15;
170 pragma Float_Representation
(IEEE_Float
, IEEE_Float_64
);
172 type IEEE_Extended_Float
is digits 15;
173 pragma Float_Representation
(IEEE_Float
, IEEE_Extended_Float
);