------------------------------------------------------------------------------
------------------------------------------------------------------------------
-- 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 .     --
------------------------------------------------------------------------------
------------------------------------------------------------------------------

with W_Pred; use W_Pred;


package body FZ_Pred is
   
   ---------------------------------------------------------------------------
   -- Fundamental Predicate Operations on FZ (finite integers)
   ---------------------------------------------------------------------------
   
   -- 1 iff N == 0 (branch-free); else 0
   function FZ_ZeroP(N : in FZ) return WBool is
      A : WBool := 1;
   begin
      for i in N'Range loop
         A := A and W_ZeroP(N(i));
      end loop;
      return A;
   end FZ_ZeroP;
   pragma Inline_Always(FZ_ZeroP);
   
   
   -- 1 iff N != 0 (branch-free); else 0
   function FZ_NZeroP(N : in FZ) return WBool is
   begin
      return 1 xor FZ_ZeroP(N);
   end FZ_NZeroP;
   pragma Inline_Always(FZ_NZeroP);
   
   
   -- 1 iff N is odd
   function FZ_OddP(N : in FZ) return WBool is
   begin
      return W_OddP(N(N'First));
   end FZ_OddP;
   pragma Inline_Always(FZ_OddP);
   
end FZ_Pred;