New language: Ada
From-SVN: r45947
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Richard Kenner
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gcc/ada/system.ads
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------------------------------------------------------------------------------
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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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-- (Compiler Version) --
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-- --
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-- $Revision: 1.48 $
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-- --
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-- Copyright (C) 1992-2001 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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-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
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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 := Standard'Tick;
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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 := Standard'Storage_Unit;
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Word_Size : constant := Standard'Word_Size;
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Memory_Size : constant := 2 ** Standard'Address_Size;
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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 :=
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Bit_Order'Val (Standard'Default_Bit_Order);
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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
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range 0 .. Standard'Max_Interrupt_Priority;
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subtype Priority is Any_Priority
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range 0 .. Standard'Max_Priority;
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-- Functional notation is needed in the following to avoid visibility
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-- problems when this package is compiled through rtsfind in the middle
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-- of another compilation.
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subtype Interrupt_Priority is Any_Priority
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range
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Standard."+" (Standard'Max_Priority, 1) ..
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Standard'Max_Interrupt_Priority;
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Default_Priority : constant Priority :=
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Standard."/" (Standard."+" (Priority'First, Priority'Last), 2);
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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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-- This version of system.ads is used only for building the compiler.
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-- We really ought to use the proper target system (i.e. the one that
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-- corresponds to the host for the compiler), but that causes as yet
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-- unsolved makefile problems. For the most part the setting of these
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-- parameters is not too critical for the compiler version (e.g. we
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-- do not use floating-point anyway in the compiler).
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AAMP : constant Boolean := False;
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Command_Line_Args : constant Boolean := True;
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Denorm : constant Boolean := True;
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Frontend_Layout : constant Boolean := False;
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Functions_Return_By_DSP : constant Boolean := False;
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Long_Shifts_Inlined : constant Boolean := True;
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High_Integrity_Mode : 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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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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end System;
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