1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
8 -- (VxWorks Version PPC) --
10 -- Copyright (C) 1992-2004 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, 59 Temple Place - Suite 330, Boston, --
25 -- MA 02111-1307, 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
42 -- make this unit Pure instead of Preelaborable, see RM 13.7(36)
44 type Name
is (SYSTEM_NAME_GNAT
);
45 System_Name
: constant Name
:= SYSTEM_NAME_GNAT
;
47 -- System-Dependent Named Numbers
49 Min_Int
: constant := Long_Long_Integer'First;
50 Max_Int
: constant := Long_Long_Integer'Last;
52 Max_Binary_Modulus
: constant := 2 ** Long_Long_Integer'Size;
53 Max_Nonbinary_Modulus
: constant := Integer'Last;
55 Max_Base_Digits
: constant := Long_Long_Float'Digits;
56 Max_Digits
: constant := Long_Long_Float'Digits;
58 Max_Mantissa
: constant := 63;
59 Fine_Delta
: constant := 2.0 ** (-Max_Mantissa
);
61 Tick
: constant := 1.0 / 60.0;
63 -- Storage-related Declarations
65 type Address
is private;
66 Null_Address
: constant Address
;
68 Storage_Unit
: constant := 8;
69 Word_Size
: constant := 32;
70 Memory_Size
: constant := 2 ** 32;
74 function "<" (Left
, Right
: Address
) return Boolean;
75 function "<=" (Left
, Right
: Address
) return Boolean;
76 function ">" (Left
, Right
: Address
) return Boolean;
77 function ">=" (Left
, Right
: Address
) return Boolean;
78 function "=" (Left
, Right
: Address
) return Boolean;
80 pragma Import
(Intrinsic
, "<");
81 pragma Import
(Intrinsic
, "<=");
82 pragma Import
(Intrinsic
, ">");
83 pragma Import
(Intrinsic
, ">=");
84 pragma Import
(Intrinsic
, "=");
86 -- Other System-Dependent Declarations
88 type Bit_Order
is (High_Order_First
, Low_Order_First
);
89 Default_Bit_Order
: constant Bit_Order
:= High_Order_First
;
91 -- Priority-related Declarations (RM D.1)
93 -- 256 is reserved for the VxWorks kernel
94 -- 248 - 255 correspond to hardware interrupt levels 0 .. 7
95 -- 247 is a catchall default "interrupt" priority for signals,
96 -- allowing higher priority than normal tasks, but lower than
97 -- hardware priority levels. Protected Object ceilings can
98 -- override these values.
99 -- 246 is used by the Interrupt_Manager task
101 Max_Priority
: constant Positive := 245;
102 Max_Interrupt_Priority
: constant Positive := 255;
104 subtype Any_Priority
is Integer range 0 .. 255;
105 subtype Priority
is Any_Priority
range 0 .. 245;
106 subtype Interrupt_Priority
is Any_Priority
range 246 .. 255;
108 Default_Priority
: constant Priority
:= 122;
112 type Address
is mod Memory_Size
;
113 Null_Address
: constant Address
:= 0;
115 --------------------------------------
116 -- System Implementation Parameters --
117 --------------------------------------
119 -- These parameters provide information about the target that is used
120 -- by the compiler. They are in the private part of System, where they
121 -- can be accessed using the special circuitry in the Targparm unit
122 -- whose source should be consulted for more detailed descriptions
123 -- of the individual switch values.
125 AAMP
: constant Boolean := False;
126 Backend_Divide_Checks
: constant Boolean := False;
127 Backend_Overflow_Checks
: constant Boolean := False;
128 Command_Line_Args
: constant Boolean := False;
129 Configurable_Run_Time
: constant Boolean := False;
130 Denorm
: constant Boolean := True;
131 Duration_32_Bits
: constant Boolean := False;
132 Exit_Status_Supported
: constant Boolean := True;
133 Fractional_Fixed_Ops
: constant Boolean := False;
134 Frontend_Layout
: constant Boolean := False;
135 Functions_Return_By_DSP
: constant Boolean := False;
136 Machine_Overflows
: constant Boolean := False;
137 Machine_Rounds
: constant Boolean := True;
138 OpenVMS
: constant Boolean := False;
139 Signed_Zeros
: constant Boolean := True;
140 Stack_Check_Default
: constant Boolean := False;
141 Stack_Check_Probes
: constant Boolean := False;
142 Support_64_Bit_Divides
: constant Boolean := True;
143 Support_Aggregates
: constant Boolean := True;
144 Support_Composite_Assign
: constant Boolean := True;
145 Support_Composite_Compare
: constant Boolean := True;
146 Support_Long_Shifts
: constant Boolean := True;
147 Suppress_Standard_Library
: constant Boolean := False;
148 Use_Ada_Main_Program_Name
: constant Boolean := True;
149 ZCX_By_Default
: constant Boolean := False;
150 GCC_ZCX_Support
: constant Boolean := True;
151 Front_End_ZCX_Support
: constant Boolean := False;
153 -- Obsolete entries, to be removed eventually (bootstrap issues!)
155 High_Integrity_Mode
: constant Boolean := False;
156 Long_Shifts_Inlined
: constant Boolean := False;