File : system-xi-sparc-full.ads
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT RUN-TIME COMPONENTS --
4 -- --
5 -- S Y S T E M --
6 -- --
7 -- S p e c --
8 -- (Sparc/32 ELF Version) --
9 -- --
10 -- Copyright (C) 1992-2015, Free Software Foundation, Inc. --
11 -- --
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. --
15 -- --
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 3, 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. --
22 -- --
23 -- --
24 -- --
25 -- --
26 -- --
27 -- You should have received a copy of the GNU General Public License and --
28 -- a copy of the GCC Runtime Library Exception along with this program; --
29 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
30 -- <http://www.gnu.org/licenses/>. --
31 -- --
32 -- GNAT was originally developed by the GNAT team at New York University. --
33 -- Extensive contributions were provided by Ada Core Technologies Inc. --
34 -- --
35 ------------------------------------------------------------------------------
36
37 -- This is a Ravenscar bare board version of this package for SPARC targets.
38 -- Compared to the high integrity version of this package, it is extended
39 -- with support for exception handlers and controlled types.
40
41 pragma Restrictions (No_Exception_Registration);
42 pragma Profile (GNAT_Extended_Ravenscar);
43
44 package System is
45 pragma Pure;
46 -- Note that we take advantage of the implementation permission to make
47 -- this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada
48 -- 2005, this is Pure in any case (AI-362).
49
50 pragma No_Elaboration_Code_All;
51 -- Allow the use of that restriction in units that WITH this unit
52
53 type Name is (SYSTEM_NAME_GNAT);
54 System_Name : constant Name := SYSTEM_NAME_GNAT;
55
56 -- System-Dependent Named Numbers
57
58 Min_Int : constant := Long_Long_Integer'First;
59 Max_Int : constant := Long_Long_Integer'Last;
60
61 Max_Binary_Modulus : constant := 2 ** Long_Long_Integer'Size;
62 Max_Nonbinary_Modulus : constant := 2 ** Integer'Size - 1;
63
64 Max_Base_Digits : constant := Long_Long_Float'Digits;
65 Max_Digits : constant := Long_Long_Float'Digits;
66
67 Max_Mantissa : constant := 63;
68 Fine_Delta : constant := 2.0 ** (-Max_Mantissa);
69
70 Tick : constant := 0.000_001;
71
72 -- Storage-related Declarations
73
74 type Address is private;
75 pragma Preelaborable_Initialization (Address);
76 Null_Address : constant Address;
77
78 Storage_Unit : constant := 8;
79 Word_Size : constant := 32;
80 Memory_Size : constant := 2 ** 32;
81
82 -- Address comparison
83
84 function "<" (Left, Right : Address) return Boolean;
85 function "<=" (Left, Right : Address) return Boolean;
86 function ">" (Left, Right : Address) return Boolean;
87 function ">=" (Left, Right : Address) return Boolean;
88 function "=" (Left, Right : Address) return Boolean;
89
90 pragma Import (Intrinsic, "<");
91 pragma Import (Intrinsic, "<=");
92 pragma Import (Intrinsic, ">");
93 pragma Import (Intrinsic, ">=");
94 pragma Import (Intrinsic, "=");
95
96 -- Other System-Dependent Declarations
97
98 type Bit_Order is (High_Order_First, Low_Order_First);
99 Default_Bit_Order : constant Bit_Order := High_Order_First;
100 pragma Warnings (Off, Default_Bit_Order); -- kill constant condition warning
101
102 -- Priority-related Declarations (RM D.1)
103
104 -- 241 - 255 correspond to hardware interrupt levels 1 .. 15
105 -- 255 is the priority value that block all interrupts
106 -- 240 is the maximum value of priority that is not high enough to
107 -- require the blocking of one or more interrupts.
108
109 Max_Priority : constant Positive := 240;
110 Max_Interrupt_Priority : constant Positive := 255;
111
112 subtype Any_Priority is Integer range 0 .. 255;
113 subtype Priority is Any_Priority range 0 .. 240;
114 subtype Interrupt_Priority is Any_Priority range 241 .. 255;
115
116 Default_Priority : constant Priority := 120;
117 -- By default, the priority assigned is the one in the middle of the
118 -- Priority range.
119
120 private
121
122 type Address is mod Memory_Size;
123 Null_Address : constant Address := 0;
124
125 --------------------------------------
126 -- System Implementation Parameters --
127 --------------------------------------
128
129 -- These parameters provide information about the target that is used
130 -- by the compiler. They are in the private part of System, where they
131 -- can be accessed using the special circuitry in the Targparm unit
132 -- whose source should be consulted for more detailed descriptions
133 -- of the individual switch values.
134
135 Atomic_Sync_Default : constant Boolean := False;
136 Backend_Divide_Checks : constant Boolean := False;
137 Backend_Overflow_Checks : constant Boolean := True;
138 Command_Line_Args : constant Boolean := False;
139 Configurable_Run_Time : constant Boolean := True;
140 Denorm : constant Boolean := False;
141 Duration_32_Bits : constant Boolean := False;
142 Exit_Status_Supported : constant Boolean := False;
143 Fractional_Fixed_Ops : constant Boolean := False;
144 Frontend_Layout : constant Boolean := False;
145 Machine_Overflows : constant Boolean := False;
146 Machine_Rounds : constant Boolean := True;
147 Preallocated_Stacks : constant Boolean := True;
148 Signed_Zeros : constant Boolean := True;
149 Stack_Check_Default : constant Boolean := False;
150 Stack_Check_Probes : constant Boolean := False;
151 Stack_Check_Limits : constant Boolean := False;
152 Support_Aggregates : constant Boolean := True;
153 Support_Composite_Assign : constant Boolean := True;
154 Support_Composite_Compare : constant Boolean := True;
155 Support_Long_Shifts : constant Boolean := True;
156 Always_Compatible_Rep : constant Boolean := True;
157 Suppress_Standard_Library : constant Boolean := False;
158 Use_Ada_Main_Program_Name : constant Boolean := False;
159 Frontend_Exceptions : constant Boolean := False;
160 ZCX_By_Default : constant Boolean := True;
161 end System;