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Diffstat (limited to 'gcc-4.2.1/gcc/ada/ttypes.ads')
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diff --git a/gcc-4.2.1/gcc/ada/ttypes.ads b/gcc-4.2.1/gcc/ada/ttypes.ads deleted file mode 100644 index 4eb8c82ba..000000000 --- a/gcc-4.2.1/gcc/ada/ttypes.ads +++ /dev/null @@ -1,210 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT COMPILER COMPONENTS -- --- -- --- T T Y P E S -- --- -- --- S p e c -- --- -- --- Copyright (C) 1992-2005, 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. -- --- -- --- GNAT was originally developed by the GNAT team at New York University. -- --- Extensive contributions were provided by Ada Core Technologies Inc. -- --- -- ------------------------------------------------------------------------------- - --- This package contains constants describing target properties - -with Types; use Types; -with Get_Targ; use Get_Targ; - -package Ttypes is - - ------------------------------ - -- Host/Target Dependencies -- - ------------------------------ - - -- It is vital to maintain a clear distinction between properties of - -- types on the host and types on the target, since in the general - -- case of a cross-compiler these will be different. - - -- This package and its companion Ttypef provide definitions of values - -- that describe the properties of the target types. All instances of - -- target dependencies, including the definitions of such packages as - -- Standard and System depend directly or indirectly on the definitions - -- in the Ttypes and Ttypef packages. - - -- In the source of the compiler, references to attributes such as - -- Integer'Size will give information regarding the host types (i.e. - -- the types within the compiler itself). Such references are therefore - -- almost always suspicious (it is hard for example to see that the - -- code in the compiler should even be using type Integer very much, - -- and certainly this code should not depend on the size of Integer). - - -- On the other hand, it is perfectly reasonable for the compiler to - -- require access to the size of type Integer for the target machine, - -- e.g. in constructing the internal representation of package Standard. - -- For this purpose, instead of referencing the attribute Integer'Size, - -- a reference to Ttypes.Standard_Integer_Size will provide the needed - -- value for the target type. - - -- Two approaches are used for handling target dependent values in the - -- standard library packages. Package Standard is handled specially, - -- being constructed internally (by package Stand). Target dependent - -- values needed in Stand are obtained by direct reference to Ttypes - -- and Ttypef. - - -- For package System, the required constant values are obtained by - -- referencing appropriate attributes. Ada 95 already defines most of - -- the required attributes, and GNAT specific attributes have been - -- defined to cover the remaining cases (such as Storage_Unit). The - -- evaluation of these attributes obtains the required target dependent - -- values from Ttypes and Ttypef. The additional attributes that have - -- been added to GNAT (Address_Size, Storage_Unit, Word_Size, Max_Priority, - -- and Max_Interrupt_Priority) are for almost all purposes redundant with - -- respect to the corresponding references to System constants. For example - -- in a program, System.Address_Size and Standard'Address_Size yield the - -- same value. The critical use of the attribute is in writing the System - -- declaration of Address_Size which of course cannot refer to itself. By - -- this means we achieve complete target independence in the source code - -- of package System, i.e. there is only one copy of the source of System - -- for all targets. - - -- Note that during compilation there are two versions of package System - -- around. The version that is directly WITH'ed by compiler packages - -- contains host-dependent definitions, which is what is needed in that - -- case (for example, System.Storage_Unit referenced in the source of the - -- compiler refers to the storage unit of the host, not the target. This - -- means that, like attribute references, any references to constants in - -- package System in the compiler code are suspicious, since it is strange - -- for the compiler to have such host dependencies. If the compiler needs - -- to access the target dependent values of such quantities as Storage_Unit - -- then it should reference the constants in this package (Ttypes), rather - -- than referencing System.Storage_Unit, or Standard'Storage_Unit, both of - -- which would yield the host value. - - --------------------------------------------------- - -- Target-Dependent Values for Types in Standard -- - --------------------------------------------------- - - -- Note: GNAT always supplies all the following integer and float types, - -- but depending on the machine, some of the types may be identical. For - -- example, on some machines, Short_Float may be the same as Float, and - -- Long_Long_Float may be the same as Long_Float. - - Standard_Short_Short_Integer_Size : constant Pos := Get_Char_Size; - Standard_Short_Short_Integer_Width : constant Pos := - Width_From_Size (Standard_Short_Short_Integer_Size); - - Standard_Short_Integer_Size : constant Pos := Get_Short_Size; - Standard_Short_Integer_Width : constant Pos := - Width_From_Size (Standard_Short_Integer_Size); - - Standard_Integer_Size : constant Pos := Get_Int_Size; - Standard_Integer_Width : constant Pos := - Width_From_Size (Standard_Integer_Size); - - Standard_Long_Integer_Size : constant Pos := Get_Long_Size; - Standard_Long_Integer_Width : constant Pos := - Width_From_Size (Standard_Long_Integer_Size); - - Standard_Long_Long_Integer_Size : constant Pos := Get_Long_Long_Size; - Standard_Long_Long_Integer_Width : constant Pos := - Width_From_Size (Standard_Long_Long_Integer_Size); - - Standard_Short_Float_Size : constant Pos := Get_Float_Size; - Standard_Short_Float_Digits : constant Pos := - Digits_From_Size (Standard_Short_Float_Size); - - Standard_Float_Size : constant Pos := Get_Float_Size; - Standard_Float_Digits : constant Pos := - Digits_From_Size (Standard_Float_Size); - - Standard_Long_Float_Size : constant Pos := Get_Double_Size; - Standard_Long_Float_Digits : constant Pos := - Digits_From_Size (Standard_Long_Float_Size); - - Standard_Long_Long_Float_Size : constant Pos := Get_Long_Double_Size; - Standard_Long_Long_Float_Digits : constant Pos := - Digits_From_Size (Standard_Long_Long_Float_Size); - - Standard_Character_Size : constant Pos := Get_Char_Size; - - Standard_Wide_Character_Size : constant Pos := 16; - Standard_Wide_Wide_Character_Size : constant Pos := 32; - -- Standard wide character sizes - - -- Note: there is no specific control over the representation of - -- enumeration types. The convention used is that if an enumeration - -- type has fewer than 2**(Character'Size) elements, then the size - -- used is Character'Size, otherwise Integer'Size is used. - - -- Similarly, the size of fixed-point types depends on the size of the - -- corresponding integer type, which is the smallest predefined integer - -- type capable of representing the required range of values. - - ------------------------------------------------- - -- Target-Dependent Values for Types in System -- - ------------------------------------------------- - - System_Address_Size : constant Pos := Get_Pointer_Size; - -- System.Address'Size (also size of all thin pointers) - - System_Max_Binary_Modulus_Power : constant Pos := - Standard_Long_Long_Integer_Size; - - System_Max_Nonbinary_Modulus_Power : constant Pos := - Standard_Integer_Size - 1; - - System_Storage_Unit : constant Pos := Get_Bits_Per_Unit; - System_Word_Size : constant Pos := Get_Bits_Per_Word; - - System_Tick_Nanoseconds : constant Pos := 1_000_000_000; - -- Value of System.Tick in nanoseconds. At the moment, this is a fixed - -- constant (with value of 1.0 seconds), but later we should add this - -- value to the GCC configuration file so that its value can be made - -- configuration dependent. - - ----------------------------------------------------- - -- Target-Dependent Values for Types in Interfaces -- - ----------------------------------------------------- - - Interfaces_Wchar_T_Size : constant Pos := Get_Wchar_T_Size; - - ---------------------------------------- - -- Other Target-Dependent Definitions -- - ---------------------------------------- - - Maximum_Alignment : constant Pos := Get_Maximum_Alignment; - -- The maximum alignment, in storage units, that an object or - -- type may require on the target machine. - - Max_Unaligned_Field : constant Pos := Get_Max_Unaligned_Field; - -- The maximum supported size in bits for a field that is not aligned - -- on a storage unit boundary. - - Bytes_Big_Endian : Boolean := Get_Bytes_BE /= 0; - -- Important note: for Ada purposes, the important setting is the bytes - -- endianness (Bytes_Big_Endian), not the bits value (Bits_Big_Endian). - -- This is because Ada bit addressing must be compatible with the byte - -- ordering (otherwise we would end up with non-contiguous fields). It - -- is rare for the two to be different, but if they are, Bits_Big_Endian - -- is relevant only for the generation of instructions with bit numbers, - -- and thus relevant only to the back end. Note that this is a variable - -- rather than a constant, since it can be modified (flipped) by -gnatd8. - - Target_Strict_Alignment : Boolean := Get_Strict_Alignment /= 0; - -- True if instructions will fail if data is misaligned - -end Ttypes; |