* config/arm/elf.h (ASM_OUTPUT_ALIGNED_COMMON): Remove definition.
[official-gcc.git] / gcc / ada / 5hsystem.ads
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1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT RUN-TIME COMPONENTS --
4 -- --
5 -- S Y S T E M --
6 -- --
7 -- S p e c --
8 -- (HP-UX Version) --
9 -- --
10 -- Copyright (C) 1992-2003 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 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. --
26 -- --
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. --
33 -- --
34 -- GNAT was originally developed by the GNAT team at New York University. --
35 -- Extensive contributions were provided by Ada Core Technologies Inc. --
36 -- --
37 ------------------------------------------------------------------------------
39 package System is
40 pragma Pure (System);
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 := 0.01;
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;
72 -- Address comparison
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 Max_Priority : constant Positive := 30;
94 Max_Interrupt_Priority : constant Positive := 31;
96 subtype Any_Priority is Integer range 0 .. 31;
97 subtype Priority is Any_Priority range 0 .. 30;
98 subtype Interrupt_Priority is Any_Priority range 31 .. 31;
100 Default_Priority : constant Priority := 15;
102 private
104 pragma Linker_Options ("-lpthread");
105 -- To ease supporting --enable-threads=posix at configure-time.
107 type Address is mod Memory_Size;
108 Null_Address : constant Address := 0;
110 --------------------------------------
111 -- System Implementation Parameters --
112 --------------------------------------
114 -- These parameters provide information about the target that is used
115 -- by the compiler. They are in the private part of System, where they
116 -- can be accessed using the special circuitry in the Targparm unit
117 -- whose source should be consulted for more detailed descriptions
118 -- of the individual switch values.
120 AAMP : constant Boolean := False;
121 Backend_Divide_Checks : constant Boolean := False;
122 Backend_Overflow_Checks : constant Boolean := False;
123 Command_Line_Args : constant Boolean := True;
124 Denorm : constant Boolean := True;
125 Exit_Status_Supported : constant Boolean := True;
126 Fractional_Fixed_Ops : constant Boolean := False;
127 Frontend_Layout : constant Boolean := False;
128 Functions_Return_By_DSP : constant Boolean := False;
129 Long_Shifts_Inlined : constant Boolean := False;
130 High_Integrity_Mode : constant Boolean := False;
131 Machine_Overflows : constant Boolean := False;
132 Machine_Rounds : constant Boolean := True;
133 OpenVMS : constant Boolean := False;
134 Signed_Zeros : constant Boolean := False;
135 Stack_Check_Default : constant Boolean := False;
136 Stack_Check_Probes : constant Boolean := False;
137 Use_Ada_Main_Program_Name : constant Boolean := False;
138 ZCX_By_Default : constant Boolean := True;
139 GCC_ZCX_Support : constant Boolean := True;
140 Front_End_ZCX_Support : constant Boolean := False;
142 --------------------------
143 -- Underlying Priorities --
144 ---------------------------
146 -- Important note: this section of the file must come AFTER the
147 -- definition of the system implementation parameters to ensure
148 -- that the value of these parameters is available for analysis
149 -- of the declarations here (using Rtsfind at compile time).
151 -- The underlying priorities table provides a generalized mechanism
152 -- for mapping from Ada priorities to system priorities. In some
153 -- cases a 1-1 mapping is not the convenient or optimal choice.
155 -- For HP/UX DCE Threads, we use the full range of 31 priorities
156 -- in the Ada model, but map them by compression onto the more limited
157 -- range of priorities available in HP/UX.
158 -- For POSIX Threads, this table is ignored.
160 -- To replace the default values of the Underlying_Priorities mapping,
161 -- copy this source file into your build directory, edit the file to
162 -- reflect your desired behavior, and recompile with the command:
164 -- $ gcc -c -O2 -gnatpgn system.ads
166 -- then recompile the run-time parts that depend on this package:
168 -- $ gnatmake -a -gnatn -O2 <your application>
170 -- then force rebuilding your application if you need different options:
172 -- $ gnatmake -f <your options> <your application>
174 type Priorities_Mapping is array (Any_Priority) of Integer;
175 pragma Suppress_Initialization (Priorities_Mapping);
176 -- Suppress initialization in case gnat.adc specifies Normalize_Scalars
178 Underlying_Priorities : constant Priorities_Mapping :=
180 (Priority'First => 16,
182 1 => 17,
183 2 => 18,
184 3 => 18,
185 4 => 18,
186 5 => 18,
187 6 => 19,
188 7 => 19,
189 8 => 19,
190 9 => 20,
191 10 => 20,
192 11 => 21,
193 12 => 21,
194 13 => 22,
195 14 => 23,
197 Default_Priority => 24,
199 16 => 25,
200 17 => 25,
201 18 => 25,
202 19 => 26,
203 20 => 26,
204 21 => 26,
205 22 => 27,
206 23 => 27,
207 24 => 27,
208 25 => 28,
209 26 => 28,
210 27 => 29,
211 28 => 29,
212 29 => 30,
214 Priority'Last => 30,
216 Interrupt_Priority => 31);
218 end System;