150 lines
7.1 KiB
Ada
150 lines
7.1 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- S Y S T E M --
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-- --
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-- S p e c --
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-- (GNU-Linux/x86 Version) --
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-- --
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-- Copyright (C) 1992-2003 Free Software Foundation, Inc. --
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-- --
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-- This specification is derived from the Ada Reference Manual for use with --
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-- GNAT. The copyright notice above, and the license provisions that follow --
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-- apply solely to the contents of the part following the private keyword. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 2, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING. If not, write --
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-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
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-- MA 02111-1307, USA. --
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-- --
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-- As a special exception, if other files instantiate generics from this --
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-- unit, or you link this unit with other files to produce an executable, --
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-- this unit does not by itself cause the resulting executable to be --
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-- covered by the GNU General Public License. This exception does not --
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-- however invalidate any other reasons why the executable file might be --
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-- covered by the GNU Public License. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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package System is
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pragma Pure (System);
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-- Note that we take advantage of the implementation permission to
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-- make this unit Pure instead of Preelaborable, see RM 13.7(36)
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type Name is (SYSTEM_NAME_GNAT);
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System_Name : constant Name := SYSTEM_NAME_GNAT;
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-- System-Dependent Named Numbers
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Min_Int : constant := Long_Long_Integer'First;
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Max_Int : constant := Long_Long_Integer'Last;
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Max_Binary_Modulus : constant := 2 ** Long_Long_Integer'Size;
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Max_Nonbinary_Modulus : constant := Integer'Last;
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Max_Base_Digits : constant := Long_Long_Float'Digits;
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Max_Digits : constant := Long_Long_Float'Digits;
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Max_Mantissa : constant := 63;
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Fine_Delta : constant := 2.0 ** (-Max_Mantissa);
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Tick : constant := 0.000_001;
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-- Storage-related Declarations
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type Address is private;
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Null_Address : constant Address;
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Storage_Unit : constant := 8;
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Word_Size : constant := 64;
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Memory_Size : constant := 2 ** 64;
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-- Address comparison
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function "<" (Left, Right : Address) return Boolean;
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function "<=" (Left, Right : Address) return Boolean;
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function ">" (Left, Right : Address) return Boolean;
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function ">=" (Left, Right : Address) return Boolean;
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function "=" (Left, Right : Address) return Boolean;
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pragma Import (Intrinsic, "<");
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pragma Import (Intrinsic, "<=");
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pragma Import (Intrinsic, ">");
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pragma Import (Intrinsic, ">=");
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pragma Import (Intrinsic, "=");
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-- Other System-Dependent Declarations
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type Bit_Order is (High_Order_First, Low_Order_First);
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Default_Bit_Order : constant Bit_Order := Low_Order_First;
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-- Priority-related Declarations (RM D.1)
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Max_Priority : constant Positive := 30;
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Max_Interrupt_Priority : constant Positive := 31;
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subtype Any_Priority is Integer range 0 .. 31;
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subtype Priority is Any_Priority range 0 .. 30;
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subtype Interrupt_Priority is Any_Priority range 31 .. 31;
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Default_Priority : constant Priority := 15;
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private
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type Address is mod Memory_Size;
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Null_Address : constant Address := 0;
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--------------------------------------
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-- System Implementation Parameters --
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--------------------------------------
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-- These parameters provide information about the target that is used
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-- by the compiler. They are in the private part of System, where they
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-- can be accessed using the special circuitry in the Targparm unit
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-- whose source should be consulted for more detailed descriptions
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-- of the individual switch values.
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AAMP : constant Boolean := False;
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Backend_Divide_Checks : constant Boolean := False;
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Backend_Overflow_Checks : constant Boolean := False;
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Command_Line_Args : constant Boolean := True;
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Configurable_Run_Time : constant Boolean := False;
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Denorm : constant Boolean := True;
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Duration_32_Bits : constant Boolean := False;
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Exit_Status_Supported : constant Boolean := True;
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Fractional_Fixed_Ops : constant Boolean := False;
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Frontend_Layout : constant Boolean := False;
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Functions_Return_By_DSP : constant Boolean := False;
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Machine_Overflows : constant Boolean := False;
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Machine_Rounds : constant Boolean := True;
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OpenVMS : constant Boolean := False;
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Signed_Zeros : constant Boolean := True;
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Stack_Check_Default : constant Boolean := False;
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Stack_Check_Probes : constant Boolean := False;
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Support_64_Bit_Divides : constant Boolean := True;
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Support_Aggregates : constant Boolean := True;
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Support_Composite_Assign : constant Boolean := True;
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Support_Composite_Compare : constant Boolean := True;
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Support_Long_Shifts : constant Boolean := True;
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Suppress_Standard_Library : constant Boolean := False;
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Use_Ada_Main_Program_Name : constant Boolean := False;
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ZCX_By_Default : constant Boolean := False;
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GCC_ZCX_Support : constant Boolean := False;
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Front_End_ZCX_Support : constant Boolean := False;
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-- Obsolete entries, to be removed eventually (bootstrap issues!)
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High_Integrity_Mode : constant Boolean := False;
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Long_Shifts_Inlined : constant Boolean := True;
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end System;
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