gcc/ada/s-vaflop.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --           S Y S T E M . V A X _ F L O A T _ O P E R A T I O N S          --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1997-2012, 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.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 --  This is a dummy body for use on non-Alpha systems so that the library
  33 --  can compile. This dummy version uses ordinary conversions and other
  34 --  arithmetic operations. It is used only for testing purposes in the
  35 --  case where the -gnatdm switch is used to force testing of VMS features
  36 --  on non-VMS systems.
  37
  38 with System.IO;
  39
  40 package body System.Vax_Float_Operations is
  41    pragma Warnings (Off);
  42    --  Warnings about infinite recursion when the -gnatdm switch is used
  43
  44    -----------
  45    -- Abs_F --
  46    -----------
  47
  48    function Abs_F (X : F) return F is
  49    begin
  50       return abs X;
  51    end Abs_F;
  52
  53    -----------
  54    -- Abs_G --
  55    -----------
  56
  57    function Abs_G (X : G) return G is
  58    begin
  59       return abs X;
  60    end Abs_G;
  61
  62    -----------
  63    -- Add_F --
  64    -----------
  65
  66    function Add_F (X, Y : F) return F is
  67    begin
  68       return X + Y;
  69    end Add_F;
  70
  71    -----------
  72    -- Add_G --
  73    -----------
  74
  75    function Add_G (X, Y : G) return G is
  76    begin
  77       return X + Y;
  78    end Add_G;
  79
  80    ------------
  81    -- D_To_G --
  82    ------------
  83
  84    function D_To_G (X : D) return G is
  85    begin
  86       return G (X);
  87    end D_To_G;
  88
  89    --------------------
  90    -- Debug_Output_D --
  91    --------------------
  92
  93    procedure Debug_Output_D (Arg : D) is
  94    begin
  95       System.IO.Put (D'Image (Arg));
  96    end Debug_Output_D;
  97
  98    --------------------
  99    -- Debug_Output_F --
 100    --------------------
 101
 102    procedure Debug_Output_F (Arg : F) is
 103    begin
 104       System.IO.Put (F'Image (Arg));
 105    end Debug_Output_F;
 106
 107    --------------------
 108    -- Debug_Output_G --
 109    --------------------
 110
 111    procedure Debug_Output_G (Arg : G) is
 112    begin
 113       System.IO.Put (G'Image (Arg));
 114    end Debug_Output_G;
 115
 116    --------------------
 117    -- Debug_String_D --
 118    --------------------
 119
 120    Debug_String_Buffer : String (1 .. 32);
 121    --  Buffer used by all Debug_String_x routines for returning result
 122
 123    function Debug_String_D (Arg : D) return System.Address is
 124       Image_String : constant String := D'Image (Arg) & ASCII.NUL;
 125       Image_Size   : constant Integer := Image_String'Length;
 126
 127    begin
 128       Debug_String_Buffer (1 .. Image_Size) := Image_String;
 129       return Debug_String_Buffer (1)'Address;
 130    end Debug_String_D;
 131
 132    --------------------
 133    -- Debug_String_F --
 134    --------------------
 135
 136    function Debug_String_F (Arg : F) return System.Address is
 137       Image_String : constant String := F'Image (Arg) & ASCII.NUL;
 138       Image_Size   : constant Integer := Image_String'Length;
 139
 140    begin
 141       Debug_String_Buffer (1 .. Image_Size) := Image_String;
 142       return Debug_String_Buffer (1)'Address;
 143    end Debug_String_F;
 144
 145    --------------------
 146    -- Debug_String_G --
 147    --------------------
 148
 149    function Debug_String_G (Arg : G) return System.Address is
 150       Image_String : constant String := G'Image (Arg) & ASCII.NUL;
 151       Image_Size   : constant Integer := Image_String'Length;
 152
 153    begin
 154       Debug_String_Buffer (1 .. Image_Size) := Image_String;
 155       return Debug_String_Buffer (1)'Address;
 156    end Debug_String_G;
 157
 158    -----------
 159    -- Div_F --
 160    -----------
 161
 162    function Div_F (X, Y : F) return F is
 163    begin
 164       return X / Y;
 165    end Div_F;
 166
 167    -----------
 168    -- Div_G --
 169    -----------
 170
 171    function Div_G (X, Y : G) return G is
 172    begin
 173       return X / Y;
 174    end Div_G;
 175
 176    ----------
 177    -- Eq_F --
 178    ----------
 179
 180    function Eq_F (X, Y : F) return Boolean is
 181    begin
 182       return X = Y;
 183    end Eq_F;
 184
 185    ----------
 186    -- Eq_G --
 187    ----------
 188
 189    function Eq_G (X, Y : G) return Boolean is
 190    begin
 191       return X = Y;
 192    end Eq_G;
 193
 194    ------------
 195    -- F_To_G --
 196    ------------
 197
 198    function F_To_G (X : F) return G is
 199    begin
 200       return G (X);
 201    end F_To_G;
 202
 203    ------------
 204    -- F_To_Q --
 205    ------------
 206
 207    function F_To_Q (X : F) return Q is
 208    begin
 209       return Q (X);
 210    end F_To_Q;
 211
 212    ------------
 213    -- F_To_S --
 214    ------------
 215
 216    function F_To_S (X : F) return S is
 217    begin
 218       return S (X);
 219    end F_To_S;
 220
 221    ------------
 222    -- G_To_D --
 223    ------------
 224
 225    function G_To_D (X : G) return D is
 226    begin
 227       return D (X);
 228    end G_To_D;
 229
 230    ------------
 231    -- G_To_F --
 232    ------------
 233
 234    function G_To_F (X : G) return F is
 235    begin
 236       return F (X);
 237    end G_To_F;
 238
 239    ------------
 240    -- G_To_Q --
 241    ------------
 242
 243    function G_To_Q (X : G) return Q is
 244    begin
 245       return Q (X);
 246    end G_To_Q;
 247
 248    ------------
 249    -- G_To_T --
 250    ------------
 251
 252    function G_To_T (X : G) return T is
 253    begin
 254       return T (X);
 255    end G_To_T;
 256
 257    ----------
 258    -- Le_F --
 259    ----------
 260
 261    function Le_F (X, Y : F) return Boolean is
 262    begin
 263       return X <= Y;
 264    end Le_F;
 265
 266    ----------
 267    -- Le_G --
 268    ----------
 269
 270    function Le_G (X, Y : G) return Boolean is
 271    begin
 272       return X <= Y;
 273    end Le_G;
 274
 275    ----------
 276    -- Lt_F --
 277    ----------
 278
 279    function Lt_F (X, Y : F) return Boolean is
 280    begin
 281       return X < Y;
 282    end Lt_F;
 283
 284    ----------
 285    -- Lt_G --
 286    ----------
 287
 288    function Lt_G (X, Y : G) return Boolean is
 289    begin
 290       return X < Y;
 291    end Lt_G;
 292
 293    -----------
 294    -- Mul_F --
 295    -----------
 296
 297    function Mul_F (X, Y : F) return F is
 298    begin
 299       return X * Y;
 300    end Mul_F;
 301
 302    -----------
 303    -- Mul_G --
 304    -----------
 305
 306    function Mul_G (X, Y : G) return G is
 307    begin
 308       return X * Y;
 309    end Mul_G;
 310
 311    ----------
 312    -- Ne_F --
 313    ----------
 314
 315    function Ne_F (X, Y : F) return Boolean is
 316    begin
 317       return X /= Y;
 318    end Ne_F;
 319
 320    ----------
 321    -- Ne_G --
 322    ----------
 323
 324    function Ne_G (X, Y : G) return Boolean is
 325    begin
 326       return X /= Y;
 327    end Ne_G;
 328
 329    -----------
 330    -- Neg_F --
 331    -----------
 332
 333    function Neg_F (X : F) return F is
 334    begin
 335       return -X;
 336    end Neg_F;
 337
 338    -----------
 339    -- Neg_G --
 340    -----------
 341
 342    function Neg_G (X : G) return G is
 343    begin
 344       return -X;
 345    end Neg_G;
 346
 347    --------
 348    -- pd --
 349    --------
 350
 351    procedure pd (Arg : D) is
 352    begin
 353       System.IO.Put_Line (D'Image (Arg));
 354    end pd;
 355
 356    --------
 357    -- pf --
 358    --------
 359
 360    procedure pf (Arg : F) is
 361    begin
 362       System.IO.Put_Line (F'Image (Arg));
 363    end pf;
 364
 365    --------
 366    -- pg --
 367    --------
 368
 369    procedure pg (Arg : G) is
 370    begin
 371       System.IO.Put_Line (G'Image (Arg));
 372    end pg;
 373
 374    ------------
 375    -- Q_To_F --
 376    ------------
 377
 378    function Q_To_F (X : Q) return F is
 379    begin
 380       return F (X);
 381    end Q_To_F;
 382
 383    ------------
 384    -- Q_To_G --
 385    ------------
 386
 387    function Q_To_G (X : Q) return G is
 388    begin
 389       return G (X);
 390    end Q_To_G;
 391
 392    ------------
 393    -- S_To_F --
 394    ------------
 395
 396    function S_To_F (X : S) return F is
 397    begin
 398       return F (X);
 399    end S_To_F;
 400
 401    --------------
 402    -- Return_D --
 403    --------------
 404
 405    function Return_D (X : D) return D is
 406    begin
 407       return X;
 408    end Return_D;
 409
 410    --------------
 411    -- Return_F --
 412    --------------
 413
 414    function Return_F (X : F) return F is
 415    begin
 416       return X;
 417    end Return_F;
 418
 419    --------------
 420    -- Return_G --
 421    --------------
 422
 423    function Return_G (X : G) return G is
 424    begin
 425       return X;
 426    end Return_G;
 427
 428    -----------
 429    -- Sub_F --
 430    -----------
 431
 432    function Sub_F (X, Y : F) return F is
 433    begin
 434       return X - Y;
 435    end Sub_F;
 436
 437    -----------
 438    -- Sub_G --
 439    -----------
 440
 441    function Sub_G (X, Y : G) return G is
 442    begin
 443       return X - Y;
 444    end Sub_G;
 445
 446    ------------
 447    -- T_To_D --
 448    ------------
 449
 450    function T_To_D (X : T) return D is
 451    begin
 452       return G_To_D (T_To_G (X));
 453    end T_To_D;
 454
 455    ------------
 456    -- T_To_G --
 457    ------------
 458
 459    function T_To_G (X : T) return G is
 460    begin
 461       return G (X);
 462    end T_To_G;
 463
 464    -------------
 465    -- Valid_D --
 466    -------------
 467
 468    --  For now, convert to IEEE and do Valid test on result. This is not quite
 469    --  accurate, but is good enough in practice.
 470
 471    function Valid_D (Arg : D) return Boolean is
 472       Val : constant T := G_To_T (D_To_G (Arg));
 473    begin
 474       return Val'Valid;
 475    end Valid_D;
 476
 477    -------------
 478    -- Valid_F --
 479    -------------
 480
 481    --  For now, convert to IEEE and do Valid test on result. This is not quite
 482    --  accurate, but is good enough in practice.
 483
 484    function Valid_F (Arg : F) return Boolean is
 485       Val : constant S := F_To_S (Arg);
 486    begin
 487       return Val'Valid;
 488    end Valid_F;
 489
 490    -------------
 491    -- Valid_G --
 492    -------------
 493
 494    --  For now, convert to IEEE and do Valid test on result. This is not quite
 495    --  accurate, but is good enough in practice.
 496
 497    function Valid_G (Arg : G) return Boolean is
 498       Val : constant T := G_To_T (Arg);
 499    begin
 500       return Val'Valid;
 501    end Valid_G;
 502
 503 end System.Vax_Float_Operations;