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Diffstat (limited to 'gcc-4.3.1/gcc/ada/s-stoele.adb')
-rw-r--r-- | gcc-4.3.1/gcc/ada/s-stoele.adb | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/gcc-4.3.1/gcc/ada/s-stoele.adb b/gcc-4.3.1/gcc/ada/s-stoele.adb new file mode 100644 index 000000000..67aae726e --- /dev/null +++ b/gcc-4.3.1/gcc/ada/s-stoele.adb @@ -0,0 +1,105 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S Y S T E M . S T O R A G E _ E L E M E N T S -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1992-2007, Free Software Foundation, Inc. -- +-- -- +-- 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. -- +-- -- +------------------------------------------------------------------------------ + +pragma Warnings (Off); +pragma Compiler_Unit; +pragma Warnings (On); + +with Ada.Unchecked_Conversion; + +package body System.Storage_Elements is + + pragma Suppress (All_Checks); + + function To_Address is + new Ada.Unchecked_Conversion (Storage_Offset, Address); + function To_Offset is + new Ada.Unchecked_Conversion (Address, Storage_Offset); + + -- Conversion to/from integers + + -- These functions must be place first because they are inlined_always + -- and are used and inlined in other subprograms defined in this unit. + + function To_Integer (Value : Address) return Integer_Address is + begin + return Integer_Address (Value); + end To_Integer; + + function To_Address (Value : Integer_Address) return Address is + begin + return Address (Value); + end To_Address; + + -- Address arithmetic + + function "+" (Left : Address; Right : Storage_Offset) return Address is + begin + return To_Address (To_Integer (Left) + To_Integer (To_Address (Right))); + end "+"; + + function "+" (Left : Storage_Offset; Right : Address) return Address is + begin + return To_Address (To_Integer (To_Address (Left)) + To_Integer (Right)); + end "+"; + + function "-" (Left : Address; Right : Storage_Offset) return Address is + begin + return To_Address (To_Integer (Left) - To_Integer (To_Address (Right))); + end "-"; + + function "-" (Left, Right : Address) return Storage_Offset is + begin + return To_Offset (To_Address (To_Integer (Left) - To_Integer (Right))); + end "-"; + + function "mod" + (Left : Address; + Right : Storage_Offset) return Storage_Offset + is + begin + if Right > 0 then + return Storage_Offset + (To_Integer (Left) mod Integer_Address (Right)); + + -- The negative case makes no sense since it is a case of a mod where + -- the left argument is unsigned and the right argument is signed. In + -- accordance with the (spirit of the) permission of RM 13.7.1(16), + -- we raise CE, and also include the zero case here. Yes, the RM says + -- PE, but this really is so obviously more like a constraint error. + + else + raise Constraint_Error; + end if; + end "mod"; +end System.Storage_Elements; |