1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME COMPONENTS -- 4-- -- 5-- S Y S T E M -- 6-- -- 7-- S p e c -- 8-- (Darwin/PPC64 Version) -- 9-- -- 10-- Copyright (C) 2011-2012, 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 37package 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 := 0.01; 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 := High_Order_First; 90 pragma Warnings (Off, Default_Bit_Order); -- kill constant condition warning 91 92 -- Priority-related Declarations (RM D.1) 93 94 -- The values defined here are copied from the ppc version. 95 96 Max_Interrupt_Priority : constant Positive := 63; 97 Max_Priority : constant Positive := Max_Interrupt_Priority - 1; 98 99 subtype Any_Priority is Integer range 0 .. Max_Interrupt_Priority; 100 subtype Priority is Any_Priority range 0 .. Max_Priority; 101 subtype Interrupt_Priority is Any_Priority 102 range Priority'Last + 1 .. Max_Interrupt_Priority; 103 104 Default_Priority : constant Priority := 105 (Priority'Last - Priority'First) / 2; 106 107private 108 109 type Address is mod Memory_Size; 110 Null_Address : constant Address := 0; 111 112 -------------------------------------- 113 -- System Implementation Parameters -- 114 -------------------------------------- 115 116 -- These parameters provide information about the target that is used 117 -- by the compiler. They are in the private part of System, where they 118 -- can be accessed using the special circuitry in the Targparm unit 119 -- whose source should be consulted for more detailed descriptions 120 -- of the individual switch values. 121 122 Backend_Divide_Checks : constant Boolean := False; 123 Backend_Overflow_Checks : constant Boolean := True; 124 Command_Line_Args : constant Boolean := True; 125 Configurable_Run_Time : constant Boolean := False; 126 Denorm : constant Boolean := True; 127 Duration_32_Bits : constant Boolean := False; 128 Exit_Status_Supported : constant Boolean := True; 129 Fractional_Fixed_Ops : constant Boolean := False; 130 Frontend_Layout : constant Boolean := False; 131 Machine_Overflows : constant Boolean := False; 132 Machine_Rounds : constant Boolean := True; 133 Preallocated_Stacks : constant Boolean := False; 134 Signed_Zeros : constant Boolean := True; 135 Stack_Check_Default : constant Boolean := False; 136 Stack_Check_Probes : constant Boolean := False; 137 Stack_Check_Limits : constant Boolean := False; 138 Support_64_Bit_Divides : constant Boolean := True; 139 Support_Aggregates : constant Boolean := True; 140 Support_Atomic_Primitives : constant Boolean := True; 141 Support_Composite_Assign : constant Boolean := True; 142 Support_Composite_Compare : constant Boolean := True; 143 Support_Long_Shifts : constant Boolean := True; 144 Always_Compatible_Rep : constant Boolean := False; 145 Suppress_Standard_Library : constant Boolean := False; 146 Use_Ada_Main_Program_Name : constant Boolean := False; 147 ZCX_By_Default : constant Boolean := True; 148 149end System; 150