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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 | -- -- | |
748086b7 | 10 | -- Copyright (C) 1992-2009, Free Software Foundation, Inc. -- |
84481f76 RK |
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- -- | |
748086b7 | 18 | -- ware Foundation; either version 3, or (at your option) any later ver- -- |
84481f76 RK |
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 -- | |
748086b7 JJ |
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/>. -- | |
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31 | -- -- |
32 | -- GNAT was originally developed by the GNAT team at New York University. -- | |
71ff80dc | 33 | -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
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34 | -- -- |
35 | ------------------------------------------------------------------------------ | |
36 | ||
37 | package System is | |
009186e0 AC |
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). | |
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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; | |
a538d226 | 52 | Max_Nonbinary_Modulus : constant := 2 ** Integer'Size - 1; |
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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 | ||
bcea76b6 | 60 | Tick : constant := 0.01; |
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61 | |
62 | -- Storage-related Declarations | |
63 | ||
64 | type Address is private; | |
a538d226 | 65 | pragma Preelaborable_Initialization (Address); |
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66 | Null_Address : constant Address; |
67 | ||
07fc65c4 GB |
68 | Storage_Unit : constant := 8; |
69 | Word_Size : constant := 32; | |
70 | Memory_Size : constant := 2 ** 32; | |
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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 := High_Order_First; | |
f28ded01 | 90 | pragma Warnings (Off, Default_Bit_Order); -- kill constant condition warning |
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91 | |
92 | -- Priority-related Declarations (RM D.1) | |
93 | ||
07fc65c4 | 94 | Max_Priority : constant Positive := 30; |
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95 | Max_Interrupt_Priority : constant Positive := 31; |
96 | ||
07fc65c4 GB |
97 | subtype Any_Priority is Integer range 0 .. 31; |
98 | subtype Priority is Any_Priority range 0 .. 30; | |
99 | subtype Interrupt_Priority is Any_Priority range 31 .. 31; | |
84481f76 | 100 | |
07fc65c4 | 101 | Default_Priority : constant Priority := 15; |
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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 | ||
07fc65c4 GB |
118 | Backend_Divide_Checks : constant Boolean := False; |
119 | Backend_Overflow_Checks : constant Boolean := False; | |
84481f76 | 120 | Command_Line_Args : constant Boolean := True; |
fbf5a39b | 121 | Configurable_Run_Time : constant Boolean := False; |
bcea76b6 | 122 | Denorm : constant Boolean := True; |
fbf5a39b | 123 | Duration_32_Bits : constant Boolean := False; |
bcea76b6 | 124 | Exit_Status_Supported : constant Boolean := True; |
07fc65c4 | 125 | Fractional_Fixed_Ops : constant Boolean := False; |
84481f76 | 126 | Frontend_Layout : constant Boolean := False; |
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127 | Machine_Overflows : constant Boolean := False; |
128 | Machine_Rounds : constant Boolean := True; | |
b23e28d5 | 129 | Preallocated_Stacks : constant Boolean := False; |
ad9945b5 | 130 | Signed_Zeros : constant Boolean := True; |
84481f76 | 131 | Stack_Check_Default : constant Boolean := False; |
f28ded01 | 132 | Stack_Check_Probes : constant Boolean := True; |
0312b364 | 133 | Stack_Check_Limits : constant Boolean := False; |
fbf5a39b AC |
134 | Support_64_Bit_Divides : constant Boolean := True; |
135 | Support_Aggregates : constant Boolean := True; | |
136 | Support_Composite_Assign : constant Boolean := True; | |
137 | Support_Composite_Compare : constant Boolean := True; | |
138 | Support_Long_Shifts : constant Boolean := True; | |
0312b364 | 139 | Always_Compatible_Rep : constant Boolean := True; |
fbf5a39b | 140 | Suppress_Standard_Library : constant Boolean := False; |
84481f76 | 141 | Use_Ada_Main_Program_Name : constant Boolean := False; |
084c663c | 142 | ZCX_By_Default : constant Boolean := True; |
bcea76b6 | 143 | GCC_ZCX_Support : constant Boolean := True; |
fbf5a39b | 144 | |
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145 | -------------------------- |
146 | -- Underlying Priorities -- | |
147 | --------------------------- | |
148 | ||
149 | -- Important note: this section of the file must come AFTER the | |
150 | -- definition of the system implementation parameters to ensure | |
151 | -- that the value of these parameters is available for analysis | |
152 | -- of the declarations here (using Rtsfind at compile time). | |
153 | ||
154 | -- The underlying priorities table provides a generalized mechanism | |
155 | -- for mapping from Ada priorities to system priorities. In some | |
156 | -- cases a 1-1 mapping is not the convenient or optimal choice. | |
157 | ||
158 | -- For HP/UX DCE Threads, we use the full range of 31 priorities | |
159 | -- in the Ada model, but map them by compression onto the more limited | |
160 | -- range of priorities available in HP/UX. | |
161 | -- For POSIX Threads, this table is ignored. | |
162 | ||
163 | -- To replace the default values of the Underlying_Priorities mapping, | |
164 | -- copy this source file into your build directory, edit the file to | |
165 | -- reflect your desired behavior, and recompile with the command: | |
166 | ||
167 | -- $ gcc -c -O2 -gnatpgn system.ads | |
168 | ||
169 | -- then recompile the run-time parts that depend on this package: | |
170 | ||
171 | -- $ gnatmake -a -gnatn -O2 <your application> | |
172 | ||
173 | -- then force rebuilding your application if you need different options: | |
174 | ||
175 | -- $ gnatmake -f <your options> <your application> | |
176 | ||
177 | type Priorities_Mapping is array (Any_Priority) of Integer; | |
178 | pragma Suppress_Initialization (Priorities_Mapping); | |
179 | -- Suppress initialization in case gnat.adc specifies Normalize_Scalars | |
180 | ||
181 | Underlying_Priorities : constant Priorities_Mapping := | |
182 | ||
183 | (Priority'First => 16, | |
184 | ||
185 | 1 => 17, | |
186 | 2 => 18, | |
187 | 3 => 18, | |
188 | 4 => 18, | |
189 | 5 => 18, | |
190 | 6 => 19, | |
191 | 7 => 19, | |
192 | 8 => 19, | |
193 | 9 => 20, | |
194 | 10 => 20, | |
195 | 11 => 21, | |
196 | 12 => 21, | |
197 | 13 => 22, | |
198 | 14 => 23, | |
199 | ||
200 | Default_Priority => 24, | |
201 | ||
202 | 16 => 25, | |
203 | 17 => 25, | |
204 | 18 => 25, | |
205 | 19 => 26, | |
206 | 20 => 26, | |
207 | 21 => 26, | |
208 | 22 => 27, | |
209 | 23 => 27, | |
210 | 24 => 27, | |
211 | 25 => 28, | |
212 | 26 => 28, | |
213 | 27 => 29, | |
214 | 28 => 29, | |
215 | 29 => 30, | |
216 | ||
217 | Priority'Last => 30, | |
218 | ||
219 | Interrupt_Priority => 31); | |
220 | ||
221 | end System; |