gcc/ada/libgnat/s-arit64.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                      S Y S T E M . A R I T H _ 6 4                       --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2023, 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 with System.Arith_Double;
  33
  34 package body System.Arith_64
  35   with SPARK_Mode
  36 is
  37
  38    subtype Uns64 is Interfaces.Unsigned_64;
  39    subtype Uns32 is Interfaces.Unsigned_32;
  40
  41    use Interfaces;
  42
  43    package Impl is new Arith_Double (Int64, Uns64, Uns32);
  44
  45    function Add_With_Ovflo_Check64 (X, Y : Int64) return Int64
  46      renames Impl.Add_With_Ovflo_Check;
  47
  48    function Subtract_With_Ovflo_Check64 (X, Y : Int64) return Int64
  49      renames Impl.Subtract_With_Ovflo_Check;
  50
  51    function Multiply_With_Ovflo_Check64 (X, Y : Int64) return Int64
  52      renames Impl.Multiply_With_Ovflo_Check;
  53
  54    procedure Scaled_Divide64
  55      (X, Y, Z : Int64;
  56       Q, R    : out Int64;
  57       Round   : Boolean)
  58      renames Impl.Scaled_Divide;
  59
  60    procedure Double_Divide64
  61      (X, Y, Z : Int64;
  62       Q, R    : out Int64;
  63       Round   : Boolean)
  64      renames Impl.Double_Divide;
  65
  66 end System.Arith_64;