OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [ada/] [system-tru64.ads] - Blame information for rev 706

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 706 jeremybenn
------------------------------------------------------------------------------
2
--                                                                          --
3
--                        GNAT RUN-TIME COMPONENTS                          --
4
--                                                                          --
5
--                               S Y S T E M                                --
6
--                                                                          --
7
--                                 S p e c                                  --
8
--                           (DEC Unix Version)                             --
9
--                                                                          --
10
--          Copyright (C) 1992-2011, 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
-- As a special exception under Section 7 of GPL version 3, you are granted --
24
-- additional permissions described in the GCC Runtime Library Exception,   --
25
-- version 3.1, as published by the Free Software Foundation.               --
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
package System is
38
   pragma Pure;
39
   --  Note that we take advantage of the implementation permission to make
40
   --  this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada
41
   --  2005, this is Pure in any case (AI-362).
42
 
43
   type Name is (SYSTEM_NAME_GNAT);
44
   System_Name : constant Name := SYSTEM_NAME_GNAT;
45
 
46
   --  System-Dependent Named Numbers
47
 
48
   Min_Int               : constant := Long_Long_Integer'First;
49
   Max_Int               : constant := Long_Long_Integer'Last;
50
 
51
   Max_Binary_Modulus    : constant := 2 ** Long_Long_Integer'Size;
52
   Max_Nonbinary_Modulus : constant := 2 ** Integer'Size - 1;
53
 
54
   Max_Base_Digits       : constant := Long_Long_Float'Digits;
55
   Max_Digits            : constant := Long_Long_Float'Digits;
56
 
57
   Max_Mantissa          : constant := 63;
58
   Fine_Delta            : constant := 2.0 ** (-Max_Mantissa);
59
 
60
   Tick                  : constant := 1.0 / 1024.0;
61
 
62
   --  Storage-related Declarations
63
 
64
   type Address is private;
65
   pragma Preelaborable_Initialization (Address);
66
   Null_Address : constant Address;
67
 
68
   Storage_Unit : constant := 8;
69
   Word_Size    : constant := 64;
70
   Memory_Size  : constant := 2 ** 64;
71
 
72
   --  Address comparison
73
 
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;
79
 
80
   pragma Import (Intrinsic, "<");
81
   pragma Import (Intrinsic, "<=");
82
   pragma Import (Intrinsic, ">");
83
   pragma Import (Intrinsic, ">=");
84
   pragma Import (Intrinsic, "=");
85
 
86
   --  Other System-Dependent Declarations
87
 
88
   type Bit_Order is (High_Order_First, Low_Order_First);
89
   Default_Bit_Order : constant Bit_Order := Low_Order_First;
90
   pragma Warnings (Off, Default_Bit_Order); -- kill constant condition warning
91
 
92
   --  Priority-related Declarations (RM D.1)
93
 
94
   Max_Priority           : constant Positive := 60;
95
   Max_Interrupt_Priority : constant Positive := 63;
96
 
97
   subtype Any_Priority       is Integer      range  0 .. 63;
98
   subtype Priority           is Any_Priority range  0 .. 60;
99
   subtype Interrupt_Priority is Any_Priority range 61 .. 63;
100
 
101
   Default_Priority : constant Priority := 30;
102
 
103
private
104
 
105
   type Address is mod Memory_Size;
106
   Null_Address : constant Address := 0;
107
 
108
   --------------------------------------
109
   -- System Implementation Parameters --
110
   --------------------------------------
111
 
112
   --  These parameters provide information about the target that is used
113
   --  by the compiler. They are in the private part of System, where they
114
   --  can be accessed using the special circuitry in the Targparm unit
115
   --  whose source should be consulted for more detailed descriptions
116
   --  of the individual switch values.
117
 
118
   Backend_Divide_Checks     : constant Boolean := False;
119
   Backend_Overflow_Checks   : constant Boolean := True;
120
   Command_Line_Args         : constant Boolean := True;
121
   Configurable_Run_Time     : constant Boolean := False;
122
   Denorm                    : constant Boolean := False;
123
   Duration_32_Bits          : constant Boolean := False;
124
   Exit_Status_Supported     : constant Boolean := True;
125
   Fractional_Fixed_Ops      : constant Boolean := False;
126
   Frontend_Layout           : constant Boolean := False;
127
   Machine_Overflows         : constant Boolean := False;
128
   Machine_Rounds            : constant Boolean := True;
129
   Preallocated_Stacks       : constant Boolean := False;
130
   Signed_Zeros              : constant Boolean := True;
131
   Stack_Check_Default       : constant Boolean := True;
132
   Stack_Check_Probes        : constant Boolean := True;
133
   Stack_Check_Limits        : constant Boolean := False;
134
   Support_Aggregates        : constant Boolean := True;
135
   Support_Composite_Assign  : constant Boolean := True;
136
   Support_Composite_Compare : constant Boolean := True;
137
   Support_Long_Shifts       : constant Boolean := True;
138
   Always_Compatible_Rep     : constant Boolean := True;
139
   Suppress_Standard_Library : constant Boolean := False;
140
   Use_Ada_Main_Program_Name : constant Boolean := False;
141
   ZCX_By_Default            : constant Boolean := True;
142
 
143
   --  Note: Denorm is False because denormals are only handled properly
144
   --  if the -mieee switch is set, and we do not require this usage.
145
 
146
   ---------------------------
147
   -- Underlying Priorities --
148
   ---------------------------
149
 
150
   --  Important note: this section of the file must come AFTER the
151
   --  definition of the system implementation parameters to ensure
152
   --  that the value of these parameters is available for analysis
153
   --  of the declarations here (using Rtsfind at compile time).
154
 
155
   --  The underlying priorities table provides a generalized mechanism
156
   --  for mapping from Ada priorities to system priorities. In some
157
   --  cases a 1-1 mapping is not the convenient or optimal choice.
158
 
159
   --  For Dec Unix 4.0d, we use a default 1-to-1 mapping that provides
160
   --  the full range of 64 priorities available from the operating system.
161
 
162
   --  On DU prior to 4.0d, less than 64 priorities are available so there
163
   --  are two possibilities:
164
 
165
   --    Limit your range of priorities to the range provided by the
166
   --    OS (e.g 16 .. 32 on 4.0b)
167
 
168
   --    Replace the standard table as described below
169
 
170
   --  To replace the default values of the Underlying_Priorities mapping,
171
   --  copy this source file into your build directory, edit the file to
172
   --  reflect your desired behavior, and recompile with the command:
173
 
174
   --     $ gcc -c -O3 -gnatpgn system.ads
175
 
176
   --  then recompile the run-time parts that depend on this package:
177
 
178
   --     $ gnatmake -a -gnatn -O3 <your application>
179
 
180
   --  then force rebuilding your application if you need different options:
181
 
182
   --     $ gnatmake -f <your options> <your application>
183
 
184
   type Priorities_Mapping is array (Any_Priority) of Integer;
185
   pragma Suppress_Initialization (Priorities_Mapping);
186
   --  Suppress initialization in case gnat.adc specifies Normalize_Scalars
187
 
188
   Underlying_Priorities : constant Priorities_Mapping :=
189
 
190
     (Priority'First => 0,
191
 
192
       1 =>  1,  2 =>  2,  3 =>  3,  4 =>  4,  5 =>  5,
193
       6 =>  6,  7 =>  7,  8 =>  8,  9 =>  9, 10 => 10,
194
      11 => 11, 12 => 12, 13 => 13, 14 => 14, 15 => 15,
195
      16 => 16, 17 => 17, 18 => 18, 19 => 19, 20 => 20,
196
      21 => 21, 22 => 22, 23 => 23, 24 => 24, 25 => 25,
197
      26 => 26, 27 => 27, 28 => 28, 29 => 29,
198
 
199
      Default_Priority => 30,
200
 
201
      31 => 31, 32 => 32, 33 => 33, 34 => 34, 35 => 35,
202
      36 => 36, 37 => 37, 38 => 38, 39 => 39, 40 => 40,
203
      41 => 41, 42 => 42, 43 => 43, 44 => 44, 45 => 45,
204
      46 => 46, 47 => 47, 48 => 48, 49 => 49, 50 => 50,
205
      51 => 51, 52 => 52, 53 => 53, 54 => 54, 55 => 55,
206
      56 => 56, 57 => 57, 58 => 58, 59 => 59,
207
 
208
      Priority'Last => 60,
209
 
210
      61 => 61, 62 => 62,
211
 
212
      Interrupt_Priority'Last => 63);
213
 
214
end System;

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.