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Diffstat (limited to 'gcc-4.9/gcc/ada/get_targ.ads')
| -rw-r--r-- | gcc-4.9/gcc/ada/get_targ.ads | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/ada/get_targ.ads b/gcc-4.9/gcc/ada/get_targ.ads new file mode 100644 index 000000000..98be7c9a7 --- /dev/null +++ b/gcc-4.9/gcc/ada/get_targ.ads @@ -0,0 +1,148 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- G E T _ T A R G -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 1992-2014, 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 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. 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 COPYING3. If not, go to -- +-- http://www.gnu.org/licenses for a complete copy of the license. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This package provides an Import to the C functions which provide +-- values related to types on the target system. It is only needed for +-- exp_dbug and the elaboration of ttypes, via the Set_Targs package. +-- It also contains the routine for registering floating-point types. + +-- NOTE: Any changes in this package must be reflected in aa_getta.adb +-- and any other version in the various back ends. + +-- Note that all these values return sizes of C types with corresponding +-- names. This allows GNAT to define the corresponding Ada types to have +-- the same representation. There is one exception to this general rule: +-- the Wide_Character_Type uses twice the size of a C char, instead of the +-- size of wchar_t. + +with Einfo; use Einfo; +with Types; use Types; + +package Get_Targ is + + -- Functions returning individual runtime values + + function Get_Bits_Per_Unit return Pos; + -- System.Storage_Unit + + function Get_Bits_Per_Word return Pos; + -- System.Word_Size + + function Get_Char_Size return Pos; + -- Size of Standard.Character + + function Get_Wchar_T_Size return Pos; + -- Size of Interfaces.C.wchar_t + + function Get_Short_Size return Pos; + -- Size of Standard.Short_Integer + + function Get_Int_Size return Pos; + -- Size of Standard.Integer + + function Get_Long_Size return Pos; + -- Size of Standard.Long_Integer + + function Get_Long_Long_Size return Pos; + -- Size of Standard.Long_Long_Integer + + function Get_Float_Size return Pos; + -- Size of Standard.Float + + function Get_Double_Size return Pos; + -- Size of Standard.Long_Float + + function Get_Long_Double_Size return Pos; + -- Size of Standard.Long_Long_Float + + function Get_Pointer_Size return Pos; + -- Size of System.Address + + function Get_Maximum_Alignment return Pos; + -- Maximum supported alignment + + function Get_Float_Words_BE return Nat; + -- Non-zero iff float words big endian + + function Get_Words_BE return Nat; + -- Non-zero iff integer words big endian + + function Get_Bytes_BE return Nat; + -- Non-zero iff bytes big-endian + + function Get_Bits_BE return Nat; + -- Non-zero iff bit order big endian + + function Get_Strict_Alignment return Nat; + -- Non-zero if target requires strict alignent + + function Get_System_Allocator_Alignment return Nat; + -- Alignment guaranteed by malloc falls + + function Get_Double_Float_Alignment return Nat; + -- Alignment required for Long_Float or 0 if no special requirement + + function Get_Double_Scalar_Alignment return Nat; + -- Alignment required for Long_Long_Integer or larger integer types + -- or 0 if no special requirement. + + function Get_Short_Enums return Int; + -- Returns non-zero if we are in short enums mode, where foreign convention + -- (in particular C and C++) enumeration types will be sized as in Ada, + -- using the shortest possibility from 8,16,32 bits, signed or unsigned. + -- A zero value means Short_Enums are not in use, and in this case all + -- foreign convention enumeration types are given the same size as c int. + + -- Other subprograms + + function Get_Max_Unaligned_Field return Pos; + -- Returns the maximum supported size in bits for a field that is + -- not aligned on a storage unit boundary. + + function Width_From_Size (Size : Pos) return Pos; + function Digits_From_Size (Size : Pos) return Pos; + -- Calculate values for 'Width or 'Digits from 'Size + + type C_String is array (0 .. 255) of aliased Character; + pragma Convention (C, C_String); + + type Register_Type_Proc is access procedure + (C_Name : C_String; -- Nul-terminated string with name of type + Digs : Natural; -- Digits for floating point, 0 otherwise + Complex : Boolean; -- True iff type has real and imaginary parts + Count : Natural; -- Number of elements in vector, 0 otherwise + Float_Rep : Float_Rep_Kind; -- Representation used for fpt type + Precision : Positive; -- Precision of representation in bits + Size : Positive; -- Size of representation in bits + Alignment : Natural); -- Required alignment in bits + pragma Convention (C, Register_Type_Proc); + -- Call back procedure for Register_Back_End_Types. This is to be used by + -- Create_Standard to create predefined types for all types supported by + -- the back end. + + procedure Register_Back_End_Types (Call_Back : Register_Type_Proc); + -- Calls the Call_Back function with information for each supported type + +end Get_Targ; |