------------------------------------------------------------------------------
------------------------------------------------------------------------------
-- This file is part of 'Finite Field Arithmetic', aka 'FFA'.               --
--                                                                          --
-- (C) 2017 Stanislav Datskovskiy ( www.loper-os.org )                      --
-- http://wot.deedbot.org/17215D118B7239507FAFED98B98228A001ABFFC7.html     --
--                                                                          --
-- You do not have, nor can you ever acquire the right to use, copy or      --
-- distribute this software ; Should you use this software for any purpose, --
-- or copy and distribute it to anyone or in any manner, you are breaking   --
-- the laws of whatever soi-disant jurisdiction, and you promise to         --
-- continue doing so for the indefinite future. In any case, please         --
-- always : read and understand any software ; verify any PGP signatures    --
-- that you use - for any purpose.                                          --
--                                                                          --
-- See also http://trilema.com/2015/a-new-software-licensing-paradigm .     --
------------------------------------------------------------------------------
------------------------------------------------------------------------------

-- From Ada:
with Ada.Text_IO; use Ada.Text_IO;

-- From FFA:
with Words;    use Words;
with FZ_Type;  use FZ_Type;

-- FFA Ch. 3
with FZ_Shift; use FZ_Shift;

-- From the Demo:
with FFA_IO;   use FFA_IO;


package body Demo_Ch3 is
   
   procedure Demo_Shifts is
      
      X : FZ(1 .. 4) := ( 16#083e16f27091f65f#,  16#74c01a9c3ce54f80#,
                          16#9fd0913737c3fcbe#,  16#fa55f3f5459a9e79# );
      
      Z : FZ(1 .. 4) := ( 0,  0,  0,  0 );
      
      -- Overflow
      O : Word := 0;
      
   begin
      
      Put_Line("~~~ Ch. 3 : Shifts ~~~");
      New_Line;
      
      Put_Line("X         =");
      Dump(X);
      New_Line;
      New_Line;
      
      -- Left Shifts:
      
      FZ_ShiftLeft_O(X, Z, 1, O);
      Put_Line("X << 1    =");
      Dump(Z);
      New_Line;
      Put_Line("Overflow  = ");
      Dump(O);
      New_Line;
      
      FZ_ShiftLeft_O(X, Z, 13, O);
      Put_Line("X << 13   =");
      Dump(Z);
      New_Line;
      Put_Line("Overflow  = ");
      Dump(O);
      New_Line;
      
      FZ_ShiftLeft_O(X, Z, 40, O);
      Put_Line("X << 40   =");
      Dump(Z);
      New_Line;
      Put_Line("Overflow  = ");
      Dump(O);
      New_Line;
      
      -- Right Shifts:
      
      FZ_ShiftRight_O(X, Z, 1, O);
      Put_Line("X >> 1    =");
      Dump(Z);
      New_Line;
      Put_Line("Overflow  = ");
      Dump(O);
      New_Line;
      
      FZ_ShiftRight_O(X, Z, 13, O);
      Put_Line("X >> 13   =");
      Dump(Z);
      New_Line;
      Put_Line("Overflow  = ");
      Dump(O);
      New_Line;
      
      FZ_ShiftRight_O(X, Z, 40, O);
      Put_Line("X >> 40   =");
      Dump(Z);
      New_Line;
      Put_Line("Overflow  = ");
      Dump(O);
      New_Line;
      
   end Demo_Shifts;
   
end Demo_Ch3;