[thirdparty/gcc.git] / gcc / ada / system-irix-n32.ads

------------------------------------------------------------------------------
--                                                                          --
--                        GNAT RUN-TIME COMPONENTS                          --
--                                                                          --
--                               S Y S T E M                                --
--                                                                          --
--                                 S p e c                                  --
--                           (SGI Irix, n32 ABI)                            --
--                                                                          --
--          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 := 64;
   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)

   --  IRIX priorities as defined by realtime(5):
   --
   --  255        is for system-level interrupts
   --  240 - 254  are suggested for hard real-time threads
   --  200 - 239  are used by system device driver interrupt threads
   --  110 - 199  are suggested for interactive real-time applications
   --   90 - 109  are used by system daemon threads
   --    0 -  89  are suggested for soft real-time applications
   --
   --  We don't express the full range of IRIX priorities.  For now, we
   --  handle only the subset for soft real-time applications.

   Max_Priority           : constant Positive := 88;
   Max_Interrupt_Priority : constant Positive := 89;

   subtype Any_Priority       is Integer      range  0 .. 89;
   subtype Priority           is Any_Priority range  0 .. 88;
   subtype Interrupt_Priority is Any_Priority range 89 .. 89;

   Default_Priority : constant Priority := 44;

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 := False;
   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 := True;
   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 := True;
   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;

   --  Note: Denorm is False because denormals are not supported on the
   --  R10000, and we want the code to be valid for this processor.

end System;
Commit	Line	Data
84481f76 RK	1	------------------------------------------------------------------------------
	2	-- --
	3	-- GNAT RUN-TIME COMPONENTS --
	4	-- --
	5	-- S Y S T E M --
	6	-- --
	7	-- S p e c --
	8	-- (SGI Irix, n32 ABI) --
	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- --
84481f76 RK	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/>. --
84481f76 RK	31	-- --
84481f76 RK	32	-- GNAT was originally developed by the GNAT team at New York University. --
71ff80dc	33	-- Extensive contributions were provided by Ada Core Technologies Inc. --
84481f76 RK	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).
84481f76 RK	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;
84481f76 RK	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
fbf5a39b	60	Tick : constant := 0.01;
84481f76 RK	61
	62	-- Storage-related Declarations
	63
	64	type Address is private;
a538d226	65	pragma Preelaborable_Initialization (Address);
84481f76 RK	66	Null_Address : constant Address;
84481f76 RK	67
07fc65c4 GB	68	Storage_Unit : constant := 8;
	69	Word_Size : constant := 64;
	70	Memory_Size : constant := 2 ** 32;
84481f76 RK	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
84481f76 RK	91
	92	-- Priority-related Declarations (RM D.1)
	93
5d09245e AC	94	-- IRIX priorities as defined by realtime(5):
	95	--
	96	-- 255 is for system-level interrupts
	97	-- 240 - 254 are suggested for hard real-time threads
	98	-- 200 - 239 are used by system device driver interrupt threads
	99	-- 110 - 199 are suggested for interactive real-time applications
	100	-- 90 - 109 are used by system daemon threads
	101	-- 0 - 89 are suggested for soft real-time applications
	102	--
	103	-- We don't express the full range of IRIX priorities. For now, we
	104	-- handle only the subset for soft real-time applications.
	105
	106	Max_Priority : constant Positive := 88;
	107	Max_Interrupt_Priority : constant Positive := 89;
	108
	109	subtype Any_Priority is Integer range 0 .. 89;
	110	subtype Priority is Any_Priority range 0 .. 88;
	111	subtype Interrupt_Priority is Any_Priority range 89 .. 89;
	112
	113	Default_Priority : constant Priority := 44;
84481f76 RK	114
	115	private
	116
	117	type Address is mod Memory_Size;
	118	Null_Address : constant Address := 0;
	119
	120	--------------------------------------
	121	-- System Implementation Parameters --
	122	--------------------------------------
	123
	124	-- These parameters provide information about the target that is used
	125	-- by the compiler. They are in the private part of System, where they
	126	-- can be accessed using the special circuitry in the Targparm unit
	127	-- whose source should be consulted for more detailed descriptions
	128	-- of the individual switch values.
	129
07fc65c4 GB	130	Backend_Divide_Checks : constant Boolean := False;
07fc65c4 GB	131	Backend_Overflow_Checks : constant Boolean := False;
84481f76	132	Command_Line_Args : constant Boolean := True;
fbf5a39b	133	Configurable_Run_Time : constant Boolean := False;
84481f76	134	Denorm : constant Boolean := False;
fbf5a39b AC	135	Duration_32_Bits : constant Boolean := False;
fbf5a39b AC	136	Exit_Status_Supported : constant Boolean := True;
07fc65c4	137	Fractional_Fixed_Ops : constant Boolean := False;
84481f76	138	Frontend_Layout : constant Boolean := False;
84481f76 RK	139	Machine_Overflows : constant Boolean := False;
84481f76 RK	140	Machine_Rounds : constant Boolean := True;
b23e28d5	141	Preallocated_Stacks : constant Boolean := False;
84481f76 RK	142	Signed_Zeros : constant Boolean := True;
	143	Stack_Check_Default : constant Boolean := False;
	144	Stack_Check_Probes : constant Boolean := True;
0312b364	145	Stack_Check_Limits : constant Boolean := False;
fbf5a39b AC	146	Support_64_Bit_Divides : constant Boolean := True;
	147	Support_Aggregates : constant Boolean := True;
	148	Support_Composite_Assign : constant Boolean := True;
	149	Support_Composite_Compare : constant Boolean := True;
	150	Support_Long_Shifts : constant Boolean := True;
0312b364	151	Always_Compatible_Rep : constant Boolean := True;
fbf5a39b	152	Suppress_Standard_Library : constant Boolean := False;
84481f76	153	Use_Ada_Main_Program_Name : constant Boolean := False;
084c663c AC	154	ZCX_By_Default : constant Boolean := True;
084c663c AC	155	GCC_ZCX_Support : constant Boolean := True;
84481f76 RK	156
	157	-- Note: Denorm is False because denormals are not supported on the
	158	-- R10000, and we want the code to be valid for this processor.
	159
	160	end System;