gcc/ada/get_targ.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                             G E T _ T A R G                              --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2018, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
  19 -- http://www.gnu.org/licenses for a complete copy of the license.          --
  20 --                                                                          --
  21 -- GNAT was originally developed  by the GNAT team at  New York University. --
  22 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  23 --                                                                          --
  24 ------------------------------------------------------------------------------
  25
  26 --  Version for use with GCC
  27
  28 package body Get_Targ is
  29
  30    --  Functions returning individual run-time values. For the standard (GCC)
  31    --  back end, these come from C interface functions (one for each value).
  32
  33    -----------------------
  34    -- Get_Bits_Per_Unit --
  35    -----------------------
  36
  37    function Get_Bits_Per_Unit return Pos is
  38       function C_Get_Bits_Per_Unit return Pos;
  39       pragma Import (C, C_Get_Bits_Per_Unit,
  40                         "get_target_bits_per_unit");
  41    begin
  42       return C_Get_Bits_Per_Unit;
  43    end Get_Bits_Per_Unit;
  44
  45    -----------------------
  46    -- Get_Bits_Per_Word --
  47    -----------------------
  48
  49    function Get_Bits_Per_Word return Pos is
  50       function C_Get_Bits_Per_Word return Pos;
  51       pragma Import (C, C_Get_Bits_Per_Word,
  52                         "get_target_bits_per_word");
  53    begin
  54       return C_Get_Bits_Per_Word;
  55    end Get_Bits_Per_Word;
  56
  57    -------------------
  58    -- Get_Char_Size --
  59    -------------------
  60
  61    function Get_Char_Size return Pos is
  62       function C_Get_Char_Size return Pos;
  63       pragma Import (C, C_Get_Char_Size,
  64                         "get_target_char_size");
  65    begin
  66       return C_Get_Char_Size;
  67    end Get_Char_Size;
  68
  69    ----------------------
  70    -- Get_Wchar_T_Size --
  71    ----------------------
  72
  73    function Get_Wchar_T_Size return Pos is
  74       function C_Get_Wchar_T_Size return Pos;
  75       pragma Import (C, C_Get_Wchar_T_Size,
  76                         "get_target_wchar_t_size");
  77    begin
  78       return C_Get_Wchar_T_Size;
  79    end Get_Wchar_T_Size;
  80
  81    --------------------
  82    -- Get_Short_Size --
  83    --------------------
  84
  85    function Get_Short_Size return Pos is
  86       function C_Get_Short_Size return Pos;
  87       pragma Import (C, C_Get_Short_Size,
  88                         "get_target_short_size");
  89    begin
  90       return C_Get_Short_Size;
  91    end Get_Short_Size;
  92
  93    ------------------
  94    -- Get_Int_Size --
  95    ------------------
  96
  97    function Get_Int_Size return Pos is
  98       function C_Get_Int_Size return Pos;
  99       pragma Import (C, C_Get_Int_Size,
 100                         "get_target_int_size");
 101    begin
 102       return C_Get_Int_Size;
 103    end Get_Int_Size;
 104
 105    -------------------
 106    -- Get_Long_Size --
 107    -------------------
 108
 109    function Get_Long_Size return Pos is
 110       function C_Get_Long_Size return Pos;
 111       pragma Import (C, C_Get_Long_Size,
 112                         "get_target_long_size");
 113    begin
 114       return C_Get_Long_Size;
 115    end Get_Long_Size;
 116
 117    ------------------------
 118    -- Get_Long_Long_Size --
 119    ------------------------
 120
 121    function Get_Long_Long_Size return Pos is
 122       function C_Get_Long_Long_Size return Pos;
 123       pragma Import (C, C_Get_Long_Long_Size,
 124                         "get_target_long_long_size");
 125    begin
 126       return C_Get_Long_Long_Size;
 127    end Get_Long_Long_Size;
 128
 129    ----------------------
 130    -- Get_Pointer_Size --
 131    ----------------------
 132
 133    function Get_Pointer_Size return Pos is
 134       function C_Get_Pointer_Size return Pos;
 135       pragma Import (C, C_Get_Pointer_Size,
 136                         "get_target_pointer_size");
 137    begin
 138       return C_Get_Pointer_Size;
 139    end Get_Pointer_Size;
 140
 141    ---------------------------
 142    -- Get_Maximum_Alignment --
 143    ---------------------------
 144
 145    function Get_Maximum_Alignment return Pos is
 146       function C_Get_Maximum_Alignment return Pos;
 147       pragma Import (C, C_Get_Maximum_Alignment,
 148                         "get_target_maximum_alignment");
 149    begin
 150       return C_Get_Maximum_Alignment;
 151    end Get_Maximum_Alignment;
 152
 153    ------------------------
 154    -- Get_Float_Words_BE --
 155    ------------------------
 156
 157    function Get_Float_Words_BE return Nat is
 158       function C_Get_Float_Words_BE return Nat;
 159       pragma Import (C, C_Get_Float_Words_BE,
 160                         "get_target_float_words_be");
 161    begin
 162       return C_Get_Float_Words_BE;
 163    end Get_Float_Words_BE;
 164
 165    ------------------
 166    -- Get_Words_BE --
 167    ------------------
 168
 169    function Get_Words_BE return Nat is
 170       function C_Get_Words_BE return Nat;
 171       pragma Import (C, C_Get_Words_BE,
 172                         "get_target_words_be");
 173    begin
 174       return C_Get_Words_BE;
 175    end Get_Words_BE;
 176
 177    ------------------
 178    -- Get_Bytes_BE --
 179    ------------------
 180
 181    function Get_Bytes_BE return Nat is
 182       function C_Get_Bytes_BE return Nat;
 183       pragma Import (C, C_Get_Bytes_BE,
 184                         "get_target_bytes_be");
 185    begin
 186       return C_Get_Bytes_BE;
 187    end Get_Bytes_BE;
 188
 189    -----------------
 190    -- Get_Bits_BE --
 191    -----------------
 192
 193    function Get_Bits_BE return Nat is
 194       function C_Get_Bits_BE return Nat;
 195       pragma Import (C, C_Get_Bits_BE,
 196                         "get_target_bits_be");
 197    begin
 198       return C_Get_Bits_BE;
 199    end Get_Bits_BE;
 200
 201    ---------------------
 202    -- Get_Short_Enums --
 203    ---------------------
 204
 205    function Get_Short_Enums return Int is
 206       flag_short_enums : Int;
 207       pragma Import (C, flag_short_enums);
 208    begin
 209       return flag_short_enums;
 210    end Get_Short_Enums;
 211
 212    --------------------------
 213    -- Get_Strict_Alignment --
 214    --------------------------
 215
 216    function Get_Strict_Alignment return Nat is
 217       function C_Get_Strict_Alignment return Nat;
 218       pragma Import (C, C_Get_Strict_Alignment,
 219                         "get_target_strict_alignment");
 220    begin
 221       return C_Get_Strict_Alignment;
 222    end Get_Strict_Alignment;
 223
 224    ------------------------------------
 225    -- Get_System_Allocator_Alignment --
 226    ------------------------------------
 227
 228    function Get_System_Allocator_Alignment return Nat is
 229       function C_Get_System_Allocator_Alignment return Nat;
 230       pragma Import (C, C_Get_System_Allocator_Alignment,
 231                         "get_target_system_allocator_alignment");
 232    begin
 233       return C_Get_System_Allocator_Alignment;
 234    end Get_System_Allocator_Alignment;
 235
 236    --------------------------------
 237    -- Get_Double_Float_Alignment --
 238    --------------------------------
 239
 240    function Get_Double_Float_Alignment return Nat is
 241       function C_Get_Double_Float_Alignment return Nat;
 242       pragma Import (C, C_Get_Double_Float_Alignment,
 243                         "get_target_double_float_alignment");
 244    begin
 245       return C_Get_Double_Float_Alignment;
 246    end Get_Double_Float_Alignment;
 247
 248    ---------------------------------
 249    -- Get_Double_Scalar_Alignment --
 250    ---------------------------------
 251
 252    function Get_Double_Scalar_Alignment return Nat is
 253       function C_Get_Double_Scalar_Alignment return Nat;
 254       pragma Import (C, C_Get_Double_Scalar_Alignment,
 255                         "get_target_double_scalar_alignment");
 256    begin
 257       return C_Get_Double_Scalar_Alignment;
 258    end Get_Double_Scalar_Alignment;
 259
 260    ------------------------------
 261    -- Get_Back_End_Config_File --
 262    ------------------------------
 263
 264    function Get_Back_End_Config_File return String_Ptr is
 265    begin
 266       return null;
 267    end Get_Back_End_Config_File;
 268
 269    ----------------------
 270    -- Digits_From_Size --
 271    ----------------------
 272
 273    function Digits_From_Size (Size : Pos) return Pos is
 274    begin
 275       case Size is
 276          when  32    => return  6;
 277          when  48    => return  9;
 278          when  64    => return 15;
 279          when  96    => return 18;
 280          when 128    => return 18;
 281          when others => raise Program_Error;
 282       end case;
 283    end Digits_From_Size;
 284
 285    -----------------------------
 286    -- Get_Max_Unaligned_Field --
 287    -----------------------------
 288
 289    function Get_Max_Unaligned_Field return Pos is
 290    begin
 291       return 64;  -- Can be different on some targets (e.g., AAMP)
 292    end Get_Max_Unaligned_Field;
 293
 294    -----------------------------
 295    -- Register_Back_End_Types --
 296    -----------------------------
 297
 298    procedure Register_Back_End_Types (Call_Back : Register_Type_Proc) is
 299       procedure Enumerate_Modes (Call_Back : Register_Type_Proc);
 300       pragma Import (C, Enumerate_Modes, "enumerate_modes");
 301    begin
 302       Enumerate_Modes (Call_Back);
 303    end Register_Back_End_Types;
 304
 305    ---------------------
 306    -- Width_From_Size --
 307    ---------------------
 308
 309    function Width_From_Size (Size : Pos) return Pos is
 310    begin
 311       case Size is
 312          when  8     => return  4;
 313          when 16     => return  6;
 314          when 32     => return 11;
 315          when 64     => return 21;
 316          when others => raise Program_Error;
 317       end case;
 318    end Width_From_Size;
 319
 320 end Get_Targ;