[thirdparty/gcc.git] / gcc / ada / system-darwin-ppc.ads

------------------------------------------------------------------------------
--                                                                          --
--                        GNAT RUN-TIME COMPONENTS                          --
--                                                                          --
--                               S Y S T E M                                --
--                                                                          --
--                                 S p e c                                  --
--                          (Darwin/PPC Version)                            --
--                                                                          --
--          Copyright (C) 1992-2009, Free Software Foundation, Inc.         --
--                                                                          --
-- This specification is derived from the Ada Reference Manual for use with --
-- GNAT. The copyright notice above, and the license provisions that follow --
-- apply solely to the  contents of the part following the private keyword. --
--                                                                          --
-- GNAT is free software;  you can  redistribute it  and/or modify it under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
--                                                                          --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception,   --
-- version 3.1, as published by the Free Software Foundation.               --
--                                                                          --
-- You should have received a copy of the GNU General Public License and    --
-- a copy of the GCC Runtime Library Exception along with this program;     --
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
-- <http://www.gnu.org/licenses/>.                                          --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

package System is
   pragma Pure;
   --  Note that we take advantage of the implementation permission to make
   --  this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada
   --  2005, this is Pure in any case (AI-362).

   type Name is (SYSTEM_NAME_GNAT);
   System_Name : constant Name := SYSTEM_NAME_GNAT;

   --  System-Dependent Named Numbers

   Min_Int               : constant := Long_Long_Integer'First;
   Max_Int               : constant := Long_Long_Integer'Last;

   Max_Binary_Modulus    : constant := 2 ** Long_Long_Integer'Size;
   Max_Nonbinary_Modulus : constant := 2 ** Integer'Size - 1;

   Max_Base_Digits       : constant := Long_Long_Float'Digits;
   Max_Digits            : constant := Long_Long_Float'Digits;

   Max_Mantissa          : constant := 63;
   Fine_Delta            : constant := 2.0 ** (-Max_Mantissa);

   Tick                  : constant := 0.01;

   --  Storage-related Declarations

   type Address is private;
   pragma Preelaborable_Initialization (Address);
   Null_Address : constant Address;

   Storage_Unit : constant := 8;
   Word_Size    : constant := 32;
   Memory_Size  : constant := 2 ** 32;

   --  Address comparison

   function "<"  (Left, Right : Address) return Boolean;
   function "<=" (Left, Right : Address) return Boolean;
   function ">"  (Left, Right : Address) return Boolean;
   function ">=" (Left, Right : Address) return Boolean;
   function "="  (Left, Right : Address) return Boolean;

   pragma Import (Intrinsic, "<");
   pragma Import (Intrinsic, "<=");
   pragma Import (Intrinsic, ">");
   pragma Import (Intrinsic, ">=");
   pragma Import (Intrinsic, "=");

   --  Other System-Dependent Declarations

   type Bit_Order is (High_Order_First, Low_Order_First);
   Default_Bit_Order : constant Bit_Order := High_Order_First;
   pragma Warnings (Off, Default_Bit_Order); -- kill constant condition warning

   --  Priority-related Declarations (RM D.1)

   --  The values defined here are derived from the following Darwin
   --  sources:
   --
   --  Libc/pthreads/pthread.c
   --    pthread_init calls host_info to retrieve the HOST_PRIORITY_INFO.
   --    This file includes "pthread_internals".
   --  Libc/pthreads/pthread_internals.h
   --    This file includes <mach/mach.h>.
   --  xnu/osfmk/mach/mach.h
   --    This file includes <mach/mach_types.h>.
   --  xnu/osfmk/mach/mach_types.h
   --    This file includes <mach/host_info.h>.
   --  xnu/osfmk/mach/host_info.h
   --    This file contains the definition of the host_info_t data structure
   --    and the function prototype for host_info.
   --  xnu/osfmk/kern/host.c
   --    This file defines the function host_info which sets the
   --    priority_info field of struct host_info_t. This file includes
   --    <kern/processor.h>.
   --  xnu/osfmk/kern/processor.h
   --    This file includes <kern/sched.h>.
   --  xnu/osfmk/kern/sched.h
   --    This file defines the values for each level of priority.

   Max_Interrupt_Priority : constant Positive := 63;
   Max_Priority           : constant Positive := Max_Interrupt_Priority - 1;

   subtype Any_Priority is Integer range 0 .. Max_Interrupt_Priority;
   subtype Priority is Any_Priority range 0 .. Max_Priority;
   subtype Interrupt_Priority is Any_Priority
     range Priority'Last + 1 .. Max_Interrupt_Priority;

   Default_Priority : constant Priority :=
                        (Priority'Last - Priority'First) / 2;

private

   type Address is mod Memory_Size;
   Null_Address : constant Address := 0;

   --------------------------------------
   -- System Implementation Parameters --
   --------------------------------------

   --  These parameters provide information about the target that is used
   --  by the compiler. They are in the private part of System, where they
   --  can be accessed using the special circuitry in the Targparm unit
   --  whose source should be consulted for more detailed descriptions
   --  of the individual switch values.

   Backend_Divide_Checks     : constant Boolean := False;
   Backend_Overflow_Checks   : constant Boolean := False;
   Command_Line_Args         : constant Boolean := True;
   Configurable_Run_Time     : constant Boolean := False;
   Denorm                    : constant Boolean := True;
   Duration_32_Bits          : constant Boolean := False;
   Exit_Status_Supported     : constant Boolean := True;
   Fractional_Fixed_Ops      : constant Boolean := False;
   Frontend_Layout           : constant Boolean := False;
   Machine_Overflows         : constant Boolean := False;
   Machine_Rounds            : constant Boolean := True;
   Preallocated_Stacks       : constant Boolean := False;
   Signed_Zeros              : constant Boolean := True;
   Stack_Check_Default       : constant Boolean := False;
   Stack_Check_Probes        : constant Boolean := False;
   Stack_Check_Limits        : constant Boolean := False;
   Support_64_Bit_Divides    : constant Boolean := True;
   Support_Aggregates        : constant Boolean := True;
   Support_Composite_Assign  : constant Boolean := True;
   Support_Composite_Compare : constant Boolean := True;
   Support_Long_Shifts       : constant Boolean := True;
   Always_Compatible_Rep     : constant Boolean := False;
   Suppress_Standard_Library : constant Boolean := False;
   Use_Ada_Main_Program_Name : constant Boolean := False;
   ZCX_By_Default            : constant Boolean := True;
   GCC_ZCX_Support           : constant Boolean := True;

end System;
Commit	Line	Data
c470d7c9 AC	1	------------------------------------------------------------------------------
	2	-- --
	3	-- GNAT RUN-TIME COMPONENTS --
	4	-- --
	5	-- S Y S T E M --
	6	-- --
	7	-- S p e c --
	8	-- (Darwin/PPC Version) --
	9	-- --
748086b7	10	-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
c470d7c9 AC	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- --
c470d7c9 AC	19	-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
c470d7c9 AC	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/>. --
c470d7c9 AC	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
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).
c470d7c9 AC	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;
c470d7c9 AC	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;
a538d226	65	pragma Preelaborable_Initialization (Address);
c470d7c9 AC	66	Null_Address : constant Address;
	67
	68	Storage_Unit : constant := 8;
	69	Word_Size : constant := 32;
	70	Memory_Size : constant := 2 ** 32;
	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
c470d7c9 AC	91
	92	-- Priority-related Declarations (RM D.1)
	93
	94	-- The values defined here are derived from the following Darwin
	95	-- sources:
	96	--
	97	-- Libc/pthreads/pthread.c
	98	-- pthread_init calls host_info to retrieve the HOST_PRIORITY_INFO.
	99	-- This file includes "pthread_internals".
	100	-- Libc/pthreads/pthread_internals.h
	101	-- This file includes <mach/mach.h>.
	102	-- xnu/osfmk/mach/mach.h
	103	-- This file includes <mach/mach_types.h>.
	104	-- xnu/osfmk/mach/mach_types.h
	105	-- This file includes <mach/host_info.h>.
	106	-- xnu/osfmk/mach/host_info.h
	107	-- This file contains the definition of the host_info_t data structure
	108	-- and the function prototype for host_info.
	109	-- xnu/osfmk/kern/host.c
	110	-- This file defines the function host_info which sets the
	111	-- priority_info field of struct host_info_t. This file includes
	112	-- <kern/processor.h>.
	113	-- xnu/osfmk/kern/processor.h
	114	-- This file includes <kern/sched.h>.
	115	-- xnu/osfmk/kern/sched.h
	116	-- This file defines the values for each level of priority.
	117
	118	Max_Interrupt_Priority : constant Positive := 63;
	119	Max_Priority : constant Positive := Max_Interrupt_Priority - 1;
	120
	121	subtype Any_Priority is Integer range 0 .. Max_Interrupt_Priority;
	122	subtype Priority is Any_Priority range 0 .. Max_Priority;
	123	subtype Interrupt_Priority is Any_Priority
	124	range Priority'Last + 1 .. Max_Interrupt_Priority;
	125
	126	Default_Priority : constant Priority :=
f28ded01	127	(Priority'Last - Priority'First) / 2;
c470d7c9 AC	128
	129	private
	130
	131	type Address is mod Memory_Size;
	132	Null_Address : constant Address := 0;
	133
	134	--------------------------------------
	135	-- System Implementation Parameters --
	136	--------------------------------------
	137
	138	-- These parameters provide information about the target that is used
	139	-- by the compiler. They are in the private part of System, where they
	140	-- can be accessed using the special circuitry in the Targparm unit
	141	-- whose source should be consulted for more detailed descriptions
	142	-- of the individual switch values.
	143
c470d7c9 AC	144	Backend_Divide_Checks : constant Boolean := False;
	145	Backend_Overflow_Checks : constant Boolean := False;
	146	Command_Line_Args : constant Boolean := True;
	147	Configurable_Run_Time : constant Boolean := False;
	148	Denorm : constant Boolean := True;
	149	Duration_32_Bits : constant Boolean := False;
	150	Exit_Status_Supported : constant Boolean := True;
	151	Fractional_Fixed_Ops : constant Boolean := False;
	152	Frontend_Layout : constant Boolean := False;
c470d7c9 AC	153	Machine_Overflows : constant Boolean := False;
c470d7c9 AC	154	Machine_Rounds : constant Boolean := True;
b23e28d5	155	Preallocated_Stacks : constant Boolean := False;
c470d7c9 AC	156	Signed_Zeros : constant Boolean := True;
	157	Stack_Check_Default : constant Boolean := False;
	158	Stack_Check_Probes : constant Boolean := False;
0312b364	159	Stack_Check_Limits : constant Boolean := False;
c470d7c9 AC	160	Support_64_Bit_Divides : constant Boolean := True;
	161	Support_Aggregates : constant Boolean := True;
	162	Support_Composite_Assign : constant Boolean := True;
	163	Support_Composite_Compare : constant Boolean := True;
	164	Support_Long_Shifts : constant Boolean := True;
81aa4e37	165	Always_Compatible_Rep : constant Boolean := False;
c470d7c9 AC	166	Suppress_Standard_Library : constant Boolean := False;
c470d7c9 AC	167	Use_Ada_Main_Program_Name : constant Boolean := False;
03eef11c AP	168	ZCX_By_Default : constant Boolean := True;
03eef11c AP	169	GCC_ZCX_Support : constant Boolean := True;
c470d7c9 AC	170
c470d7c9 AC	171	end System;