1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
8 -- (LynxOS x86 Version) --
10 -- Copyright (C) 1992-2008, Free Software Foundation, Inc. --
12 -- This specification is derived from the Ada Reference Manual for use with --
13 -- GNAT. The copyright notice above, and the license provisions that follow --
14 -- apply solely to the contents of the part following the private keyword. --
16 -- GNAT is free software; you can redistribute it and/or modify it under --
17 -- terms of the GNU General Public License as published by the Free Soft- --
18 -- ware Foundation; either version 2, or (at your option) any later ver- --
19 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
20 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
21 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
22 -- for more details. You should have received a copy of the GNU General --
23 -- Public License distributed with GNAT; see file COPYING. If not, write --
24 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
25 -- Boston, MA 02110-1301, USA. --
27 -- As a special exception, if other files instantiate generics from this --
28 -- unit, or you link this unit with other files to produce an executable, --
29 -- this unit does not by itself cause the resulting executable to be --
30 -- covered by the GNU General Public License. This exception does not --
31 -- however invalidate any other reasons why the executable file might be --
32 -- covered by the GNU Public License. --
34 -- GNAT was originally developed by the GNAT team at New York University. --
35 -- Extensive contributions were provided by Ada Core Technologies Inc. --
37 ------------------------------------------------------------------------------
41 -- Note that we take advantage of the implementation permission to make
42 -- this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada
43 -- 2005, this is Pure in any case (AI-362).
45 type Name
is (SYSTEM_NAME_GNAT
);
46 System_Name
: constant Name
:= SYSTEM_NAME_GNAT
;
48 -- System-Dependent Named Numbers
50 Min_Int
: constant := Long_Long_Integer'First;
51 Max_Int
: constant := Long_Long_Integer'Last;
53 Max_Binary_Modulus
: constant := 2 ** Long_Long_Integer'Size;
54 Max_Nonbinary_Modulus
: constant := 2 ** Integer'Size - 1;
56 Max_Base_Digits
: constant := Long_Long_Float'Digits;
57 Max_Digits
: constant := Long_Long_Float'Digits;
59 Max_Mantissa
: constant := 63;
60 Fine_Delta
: constant := 2.0 ** (-Max_Mantissa
);
62 Tick
: constant := 0.01;
64 -- Storage-related Declarations
66 type Address
is private;
67 pragma Preelaborable_Initialization
(Address
);
68 Null_Address
: constant Address
;
70 Storage_Unit
: constant := 8;
71 Word_Size
: constant := 32;
72 Memory_Size
: constant := 2 ** 32;
76 function "<" (Left
, Right
: Address
) return Boolean;
77 function "<=" (Left
, Right
: Address
) return Boolean;
78 function ">" (Left
, Right
: Address
) return Boolean;
79 function ">=" (Left
, Right
: Address
) return Boolean;
80 function "=" (Left
, Right
: Address
) return Boolean;
82 pragma Import
(Intrinsic
, "<");
83 pragma Import
(Intrinsic
, "<=");
84 pragma Import
(Intrinsic
, ">");
85 pragma Import
(Intrinsic
, ">=");
86 pragma Import
(Intrinsic
, "=");
88 -- Other System-Dependent Declarations
90 type Bit_Order
is (High_Order_First
, Low_Order_First
);
91 Default_Bit_Order
: constant Bit_Order
:= Low_Order_First
;
92 pragma Warnings
(Off
, Default_Bit_Order
); -- kill constant condition warning
94 -- Priority-related Declarations (RM D.1)
96 -- 17 is the system determined default priority for user applications
99 -- The standard (Rm 13.7) requires that Default_Priority has the value:
101 -- (Priority'First + Priority'Last) / 2
103 -- To allow an appropriate value for Default_Priority and expose a useful
104 -- range of priorities to the user, we use a range of 0 .. 34 for subtype
107 -- The rest of the range allowed by the system from 35 to 255 is made
108 -- available here in Interrupt_Priority.
110 Max_Priority
: constant Positive := 34;
111 Max_Interrupt_Priority
: constant Positive := 255;
113 subtype Any_Priority
is Integer range 0 .. 255;
114 subtype Priority
is Any_Priority
range 0 .. 34;
115 subtype Interrupt_Priority
is Any_Priority
range 35 .. 255;
117 Default_Priority
: constant Priority
:= 17;
121 type Address
is mod Memory_Size
;
122 Null_Address
: constant Address
:= 0;
124 --------------------------------------
125 -- System Implementation Parameters --
126 --------------------------------------
128 -- These parameters provide information about the target that is used
129 -- by the compiler. They are in the private part of System, where they
130 -- can be accessed using the special circuitry in the Targparm unit
131 -- whose source should be consulted for more detailed descriptions
132 -- of the individual switch values.
134 Backend_Divide_Checks
: constant Boolean := False;
135 Backend_Overflow_Checks
: constant Boolean := False;
136 Command_Line_Args
: constant Boolean := True;
137 Configurable_Run_Time
: constant Boolean := False;
138 Denorm
: constant Boolean := True;
139 Duration_32_Bits
: constant Boolean := False;
140 Exit_Status_Supported
: constant Boolean := True;
141 Fractional_Fixed_Ops
: constant Boolean := False;
142 Frontend_Layout
: constant Boolean := False;
143 Machine_Overflows
: constant Boolean := False;
144 Machine_Rounds
: constant Boolean := True;
145 Preallocated_Stacks
: constant Boolean := False;
146 Signed_Zeros
: constant Boolean := True;
147 Stack_Check_Default
: constant Boolean := False;
148 Stack_Check_Probes
: constant Boolean := True;
149 Stack_Check_Limits
: constant Boolean := False;
150 Support_64_Bit_Divides
: constant Boolean := True;
151 Support_Aggregates
: constant Boolean := True;
152 Support_Composite_Assign
: constant Boolean := True;
153 Support_Composite_Compare
: constant Boolean := True;
154 Support_Long_Shifts
: constant Boolean := True;
155 Always_Compatible_Rep
: constant Boolean := False;
156 Suppress_Standard_Library
: constant Boolean := False;
157 Use_Ada_Main_Program_Name
: constant Boolean := False;
158 ZCX_By_Default
: constant Boolean := False;
159 GCC_ZCX_Support
: constant Boolean := False;