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ffa_ch3_shifts.kv       1 ------------------------------------------------------------------------------
ffa_ch3_shifts.kv       2 ------------------------------------------------------------------------------
ffa_ch3_shifts.kv       3 -- This file is part of 'Finite Field Arithmetic', aka 'FFA'.               --
ffa_ch3_shifts.kv       4 --                                                                          --
ffa_ch3_shifts.kv       5 -- (C) 2017 Stanislav Datskovskiy ( www.loper-os.org )                      --
ffa_ch3_shifts.kv       6 -- http://wot.deedbot.org/17215D118B7239507FAFED98B98228A001ABFFC7.html     --
ffa_ch3_shifts.kv       7 --                                                                          --
ffa_ch3_shifts.kv       8 -- You do not have, nor can you ever acquire the right to use, copy or      --
ffa_ch3_shifts.kv       9 -- distribute this software ; Should you use this software for any purpose, --
ffa_ch3_shifts.kv      10 -- or copy and distribute it to anyone or in any manner, you are breaking   --
ffa_ch3_shifts.kv      11 -- the laws of whatever soi-disant jurisdiction, and you promise to         --
ffa_ch3_shifts.kv      12 -- continue doing so for the indefinite future. In any case, please         --
ffa_ch3_shifts.kv      13 -- always : read and understand any software ; verify any PGP signatures    --
ffa_ch3_shifts.kv      14 -- that you use - for any purpose.                                          --
ffa_ch3_shifts.kv      15 --                                                                          --
ffa_ch3_shifts.kv      16 -- See also http://trilema.com/2015/a-new-software-licensing-paradigm .     --
ffa_ch3_shifts.kv      17 ------------------------------------------------------------------------------
ffa_ch3_shifts.kv      18 ------------------------------------------------------------------------------
ffa_ch3_shifts.kv      19 
ffa_ch2_logicals.kv    20 with W_Pred;   use W_Pred;
ffa_ch2_logicals.kv    21 with FZ_Arith; use FZ_Arith;
ffa_ch2_logicals.kv    22 
ffa_ch2_logicals.kv    23 
ffa_ch2_logicals.kv    24 package body FZ_Cmp is
ffa_ch2_logicals.kv    25    
ffa_ch2_logicals.kv    26    ---------------------------------------------
ffa_ch2_logicals.kv    27    -- Arithmetical Predicate Operations on FZ --
ffa_ch2_logicals.kv    28    ---------------------------------------------
ffa_ch2_logicals.kv    29    
ffa_ch2_logicals.kv    30    -- 1 iff X == Y (branch-free); else 0
ffa_ch2_logicals.kv    31    function FZ_EqP(X : in FZ; Y : in FZ) return WBool is
ffa_ch2_logicals.kv    32       A : WBool := 1;
ffa_ch2_logicals.kv    33    begin
ffa_ch2_logicals.kv    34       for i in X'Range loop
ffa_ch2_logicals.kv    35          A := A and W_EqP(X(i), Y(i));
ffa_ch2_logicals.kv    36       end loop;
ffa_ch2_logicals.kv    37       return A;
ffa_ch2_logicals.kv    38    end FZ_EqP;
ffa_ch2_logicals.kv    39    
ffa_ch2_logicals.kv    40    
ffa_ch2_logicals.kv    41    -- 1 iff X < Y (branch-free); else 0
ffa_ch2_logicals.kv    42    function FZ_LessThanP(X : in FZ; Y : in FZ) return WBool is
ffa_ch2_logicals.kv    43       Scratch : FZ(X'Range);
ffa_ch2_logicals.kv    44       Borrow  : WBool := 0;
ffa_ch2_logicals.kv    45    begin
ffa_ch2_logicals.kv    46       FZ_Sub(X, Y, Scratch, Borrow);
ffa_ch2_logicals.kv    47       return Borrow;
ffa_ch2_logicals.kv    48    end FZ_LessThanP;
ffa_ch2_logicals.kv    49    
ffa_ch2_logicals.kv    50    
ffa_ch2_logicals.kv    51    -- 1 iff X > Y (branch-free); else 0
ffa_ch2_logicals.kv    52    function FZ_GreaterThanP(X : in FZ; Y: in FZ) return WBool is
ffa_ch2_logicals.kv    53       Scratch : FZ(X'Range);
ffa_ch2_logicals.kv    54       Borrow  : WBool := 0;
ffa_ch2_logicals.kv    55    begin
ffa_ch2_logicals.kv    56       FZ_Sub(Y, X, Scratch, Borrow);
ffa_ch2_logicals.kv    57       return Borrow;
ffa_ch2_logicals.kv    58    end FZ_GreaterThanP;
ffa_ch2_logicals.kv    59    
ffa_ch2_logicals.kv    60 end FZ_Cmp;