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Diffstat (limited to 'gcc-4.2.1/gcc/ada/s-stoele.ads')
| -rw-r--r-- | gcc-4.2.1/gcc/ada/s-stoele.ads | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/gcc-4.2.1/gcc/ada/s-stoele.ads b/gcc-4.2.1/gcc/ada/s-stoele.ads new file mode 100644 index 000000000..ca50e03e8 --- /dev/null +++ b/gcc-4.2.1/gcc/ada/s-stoele.ads @@ -0,0 +1,110 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S Y S T E M . S T O R A G E _ E L E M E N T S -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 2002-2005 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 implementation dependent sections of this file. -- +-- -- +-- 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 2, 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. See the GNU General Public License -- +-- for more details. You should have received a copy of the GNU General -- +-- Public License distributed with GNAT; see file COPYING. If not, write -- +-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- +-- Boston, MA 02110-1301, USA. -- +-- -- +-- As a special exception, if other files instantiate generics from this -- +-- unit, or you link this unit with other files to produce an executable, -- +-- this unit does not by itself cause the resulting executable to be -- +-- covered by the GNU General Public License. This exception does not -- +-- however invalidate any other reasons why the executable file might be -- +-- covered by the GNU Public License. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- Warning: declarations in this package are ambiguous with respect to the +-- extra declarations that can be introduced into System using Extend_System. +-- It is a good idea to avoid use clauses for this package! + +package System.Storage_Elements 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). + + -- We also add the pragma Pure_Function to the operations in this package, + -- because otherwise functions with parameters derived from Address are + -- treated as non-pure by the back-end (see exp_ch6.adb). This is because + -- in many cases such a parameter is used to hide read/out access to + -- objects, and it would be unsafe to treat such functions as pure. + + type Storage_Offset is range + -(2 ** (Integer'(Standard'Address_Size) - 1)) .. + +(2 ** (Integer'(Standard'Address_Size) - 1)) - Long_Long_Integer'(1); + + subtype Storage_Count is Storage_Offset range 0 .. Storage_Offset'Last; + + type Storage_Element is mod 2 ** Storage_Unit; + for Storage_Element'Size use Storage_Unit; + + type Storage_Array is + array (Storage_Offset range <>) of aliased Storage_Element; + for Storage_Array'Component_Size use Storage_Unit; + + -- Address arithmetic + + function "+" (Left : Address; Right : Storage_Offset) return Address; + pragma Convention (Intrinsic, "+"); + pragma Inline_Always ("+"); + pragma Pure_Function ("+"); + + function "+" (Left : Storage_Offset; Right : Address) return Address; + pragma Convention (Intrinsic, "+"); + pragma Inline_Always ("+"); + pragma Pure_Function ("+"); + + function "-" (Left : Address; Right : Storage_Offset) return Address; + pragma Convention (Intrinsic, "-"); + pragma Inline_Always ("-"); + pragma Pure_Function ("-"); + + function "-" (Left, Right : Address) return Storage_Offset; + pragma Convention (Intrinsic, "-"); + pragma Inline_Always ("-"); + pragma Pure_Function ("-"); + + function "mod" + (Left : Address; + Right : Storage_Offset) return Storage_Offset; + pragma Convention (Intrinsic, "mod"); + pragma Inline_Always ("mod"); + pragma Pure_Function ("mod"); + + -- Conversion to/from integers + + type Integer_Address is mod Memory_Size; + + function To_Address (Value : Integer_Address) return Address; + pragma Convention (Intrinsic, To_Address); + pragma Inline_Always (To_Address); + pragma Pure_Function (To_Address); + + function To_Integer (Value : Address) return Integer_Address; + pragma Convention (Intrinsic, To_Integer); + pragma Inline_Always (To_Integer); + pragma Pure_Function (To_Integer); + +end System.Storage_Elements; |