gcc/ada/sem_vfpt.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                             S E M _ V F P T                              --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1997-2010, 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 with CStand;   use CStand;
  27 with Einfo;    use Einfo;
  28 with Opt;      use Opt;
  29 with Stand;    use Stand;
  30 with Targparm; use Targparm;
  31
  32 package body Sem_VFpt is
  33
  34    -----------------
  35    -- Set_D_Float --
  36    -----------------
  37
  38    procedure Set_D_Float (E : Entity_Id) is
  39       VAXDF_Digits : constant := 9;
  40
  41    begin
  42       Init_Size         (Base_Type (E), 64);
  43       Init_Alignment    (Base_Type (E));
  44       Init_Digits_Value (Base_Type (E), VAXDF_Digits);
  45       Set_Float_Rep     (Base_Type (E), VAX_Native);
  46       Set_Float_Bounds  (Base_Type (E));
  47
  48       Init_Size         (E, 64);
  49       Init_Alignment    (E);
  50       Init_Digits_Value (E, VAXDF_Digits);
  51       Set_Scalar_Range  (E, Scalar_Range (Base_Type (E)));
  52    end Set_D_Float;
  53
  54    -----------------
  55    -- Set_F_Float --
  56    -----------------
  57
  58    procedure Set_F_Float (E : Entity_Id) is
  59       VAXFF_Digits : constant := 6;
  60
  61    begin
  62       Init_Size         (Base_Type (E), 32);
  63       Init_Alignment    (Base_Type (E));
  64       Init_Digits_Value (Base_Type (E), VAXFF_Digits);
  65       Set_Float_Rep     (Base_Type (E), VAX_Native);
  66       Set_Float_Bounds  (Base_Type (E));
  67
  68       Init_Size         (E, 32);
  69       Init_Alignment    (E);
  70       Init_Digits_Value (E, VAXFF_Digits);
  71       Set_Scalar_Range  (E, Scalar_Range (Base_Type (E)));
  72    end Set_F_Float;
  73
  74    -----------------
  75    -- Set_G_Float --
  76    -----------------
  77
  78    procedure Set_G_Float (E : Entity_Id) is
  79       VAXGF_Digits : constant := 15;
  80
  81    begin
  82       Init_Size         (Base_Type (E), 64);
  83       Init_Alignment    (Base_Type (E));
  84       Init_Digits_Value (Base_Type (E), VAXGF_Digits);
  85       Set_Float_Rep     (Base_Type (E), VAX_Native);
  86       Set_Float_Bounds  (Base_Type (E));
  87
  88       Init_Size         (E, 64);
  89       Init_Alignment    (E);
  90       Init_Digits_Value (E, VAXGF_Digits);
  91       Set_Scalar_Range  (E, Scalar_Range (Base_Type (E)));
  92    end Set_G_Float;
  93
  94    -------------------
  95    -- Set_IEEE_Long --
  96    -------------------
  97
  98    procedure Set_IEEE_Long (E : Entity_Id) is
  99       IEEEL_Digits : constant := 15;
 100
 101    begin
 102       Init_Size         (Base_Type (E), 64);
 103       Init_Alignment    (Base_Type (E));
 104       Init_Digits_Value (Base_Type (E), IEEEL_Digits);
 105       Set_Float_Rep     (Base_Type (E), IEEE_Binary);
 106       Set_Float_Bounds  (Base_Type (E));
 107
 108       Init_Size         (E, 64);
 109       Init_Alignment    (E);
 110       Init_Digits_Value (E, IEEEL_Digits);
 111       Set_Scalar_Range  (E, Scalar_Range (Base_Type (E)));
 112    end Set_IEEE_Long;
 113
 114    --------------------
 115    -- Set_IEEE_Short --
 116    --------------------
 117
 118    procedure Set_IEEE_Short (E : Entity_Id) is
 119       IEEES_Digits : constant := 6;
 120
 121    begin
 122       Init_Size         (Base_Type (E), 32);
 123       Init_Alignment    (Base_Type (E));
 124       Init_Digits_Value (Base_Type (E), IEEES_Digits);
 125       Set_Float_Rep     (Base_Type (E), IEEE_Binary);
 126       Set_Float_Bounds  (Base_Type (E));
 127
 128       Init_Size         (E, 32);
 129       Init_Alignment    (E);
 130       Init_Digits_Value (E, IEEES_Digits);
 131       Set_Scalar_Range  (E, Scalar_Range (Base_Type (E)));
 132    end Set_IEEE_Short;
 133
 134    ------------------------------
 135    -- Set_Standard_Fpt_Formats --
 136    ------------------------------
 137
 138    procedure Set_Standard_Fpt_Formats is
 139    begin
 140       --  IEEE case
 141
 142       if Opt.Float_Format = 'I' then
 143          Set_IEEE_Short (Standard_Float);
 144          Set_IEEE_Long  (Standard_Long_Float);
 145          Set_IEEE_Long  (Standard_Long_Long_Float);
 146
 147       --  Vax float case
 148
 149       else
 150          Set_F_Float (Standard_Float);
 151
 152          if Opt.Float_Format_Long = 'D' then
 153             Set_D_Float (Standard_Long_Float);
 154          else
 155             Set_G_Float (Standard_Long_Float);
 156          end if;
 157
 158          --  Note: Long_Long_Float gets set only in the real VMS case,
 159          --  because this gives better results for testing out the use
 160          --  of VAX float on non-VMS environments with the -gnatdm switch.
 161
 162          if OpenVMS_On_Target then
 163             Set_G_Float (Standard_Long_Long_Float);
 164          end if;
 165       end if;
 166    end Set_Standard_Fpt_Formats;
 167
 168 end Sem_VFpt;