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ffa_ch1_genesis.kv      1 ------------------------------------------------------------------------------
ffa_ch1_genesis.kv      2 ------------------------------------------------------------------------------
ffa_ch1_genesis.kv      3 -- This file is part of 'Finite Field Arithmetic', aka 'FFA'.               --
ffa_ch1_genesis.kv      4 --                                                                          --
ffa_ch15_gcd.kv         5 -- (C) 2019 Stanislav Datskovskiy ( www.loper-os.org )                      --
ffa_ch1_genesis.kv      6 -- http://wot.deedbot.org/17215D118B7239507FAFED98B98228A001ABFFC7.html     --
ffa_ch1_genesis.kv      7 --                                                                          --
ffa_ch1_genesis.kv      8 -- You do not have, nor can you ever acquire the right to use, copy or      --
ffa_ch1_genesis.kv      9 -- distribute this software ; Should you use this software for any purpose, --
ffa_ch1_genesis.kv     10 -- or copy and distribute it to anyone or in any manner, you are breaking   --
ffa_ch1_genesis.kv     11 -- the laws of whatever soi-disant jurisdiction, and you promise to         --
ffa_ch1_genesis.kv     12 -- continue doing so for the indefinite future. In any case, please         --
ffa_ch1_genesis.kv     13 -- always : read and understand any software ; verify any PGP signatures    --
ffa_ch1_genesis.kv     14 -- that you use - for any purpose.                                          --
ffa_ch1_genesis.kv     15 --                                                                          --
ffa_ch1_genesis.kv     16 -- See also http://trilema.com/2015/a-new-software-licensing-paradigm .     --
ffa_ch1_genesis.kv     17 ------------------------------------------------------------------------------
ffa_ch1_genesis.kv     18 ------------------------------------------------------------------------------
ffa_ch1_genesis.kv     19 
ffa_ch1_genesis.kv     20 with Words;   use Words;
ffa_ch1_genesis.kv     21 with FZ_Type; use FZ_Type;
ffa_ch1_genesis.kv     22 
ffa_ch10_karatsub...   23 
ffa_ch1_genesis.kv     24 -- Fundamental Arithmetic operators on FZ:
ffa_ch1_genesis.kv     25 package FZ_Arith is
ffa_ch1_genesis.kv     26    
ffa_ch1_genesis.kv     27    pragma Pure;
ffa_ch1_genesis.kv     28    
ffa_ch10_karatsub...   29    -- Destructive Add: X := X + Y; Overflow := Carry; optional OF_In
ffa_ch10_karatsub...   30    procedure FZ_Add_D(X          : in out FZ;
ffa_ch10_karatsub...   31                       Y          : in     FZ;
ffa_ch10_karatsub...   32                       Overflow   : out    WBool;
ffa_ch10_karatsub...   33                       OF_In      : in     WBool := 0);
ffa_ch11_tuning_a...   34    pragma Inline_Always(FZ_Add_D);
ffa_ch10_karatsub...   35    
ffa_ch10_karatsub...   36       -- Destructive Add: X := X + W; Overflow := Carry
ffa_ch10_karatsub...   37    procedure FZ_Add_D_W(X        : in out FZ;
ffa_ch10_karatsub...   38                         W        : in     Word;
ffa_ch10_karatsub...   39                         Overflow : out    WBool);
ffa_ch11_tuning_a...   40    pragma Inline_Always(FZ_Add_D_W);
ffa_ch10_karatsub...   41    
ffa_ch1_genesis.kv     42    -- Sum := X + Y; Overflow := Carry
ffa_ch1_genesis.kv     43    procedure FZ_Add(X          : in    FZ;
ffa_ch1_genesis.kv     44                     Y          : in    FZ;
ffa_ch1_genesis.kv     45                     Sum        : out   FZ;
ffa_ch1_genesis.kv     46                     Overflow   : out   WBool);
ffa_ch11_tuning_a...   47    pragma Inline_Always(FZ_Add);
ffa_ch1_genesis.kv     48    
ffa_ch5_egypt.kv       49    -- Gate = 1: Sum := X + Y; Overflow := Carry
ffa_ch5_egypt.kv       50    -- Gate = 0: Sum := X;     Overflow := 0
ffa_ch5_egypt.kv       51    procedure FZ_Add_Gated_O(X          : in  FZ;
ffa_ch5_egypt.kv       52                             Y          : in  FZ;
ffa_ch5_egypt.kv       53                             Gate       : in  WBool;
ffa_ch5_egypt.kv       54                             Sum        : out FZ;
ffa_ch5_egypt.kv       55                             Overflow   : out WBool);
ffa_ch11_tuning_a...   56    pragma Inline_Always(FZ_Add_Gated_O);
ffa_ch5_egypt.kv       57    
ffa_ch5_egypt.kv       58    -- Same as FZ_Add_Gated_O, but without Overflow output
ffa_ch5_egypt.kv       59    procedure FZ_Add_Gated(X          : in  FZ;
ffa_ch5_egypt.kv       60                           Y          : in  FZ;
ffa_ch5_egypt.kv       61                           Gate       : in  WBool;
ffa_ch5_egypt.kv       62                           Sum        : out FZ);
ffa_ch11_tuning_a...   63    pragma Inline_Always(FZ_Add_Gated);
ffa_ch5_egypt.kv       64    
ffa_ch12_karatsub...   65    -- Destructive Sub: X := X - Y; Underflow := Borrow
ffa_ch12_karatsub...   66    procedure FZ_Sub_D(X          : in out FZ;
ffa_ch12_karatsub...   67                       Y          : in     FZ;
ffa_ch12_karatsub...   68                       Underflow  : out    WBool);
ffa_ch12_karatsub...   69    pragma Inline_Always(FZ_Sub_D);
ffa_ch12_karatsub...   70    
ffa_ch1_genesis.kv     71    -- Difference := X - Y; Underflow := Borrow
ffa_ch1_genesis.kv     72    procedure FZ_Sub(X          : in  FZ;
ffa_ch1_genesis.kv     73                     Y          : in  FZ;
ffa_ch1_genesis.kv     74                     Difference : out FZ;
ffa_ch1_genesis.kv     75                     Underflow  : out WBool);
ffa_ch11_tuning_a...   76    pragma Inline_Always(FZ_Sub);
ffa_ch1_genesis.kv     77    
ffa_ch10_karatsub...   78    -- Destructive: If Cond is 1, NotN := ~N; otherwise NotN := N.
ffa_ch10_karatsub...   79    procedure FZ_Not_Cond_D(N    : in out FZ;
ffa_ch10_karatsub...   80                            Cond : in     WBool);
ffa_ch11_tuning_a...   81    pragma Inline_Always(FZ_Not_Cond_D);
ffa_ch10_karatsub...   82    
ffa_ch10_karatsub...   83    -- Subtractor that gets absolute value if underflowed, in const. time
ffa_ch10_karatsub...   84    procedure FZ_Sub_Abs(X          : in FZ;
ffa_ch10_karatsub...   85                         Y          : in FZ;
ffa_ch10_karatsub...   86                         Difference : out FZ;
ffa_ch10_karatsub...   87                         Underflow  : out WBool);
ffa_ch11_tuning_a...   88    pragma Inline_Always(FZ_Sub_Abs);
ffa_ch10_karatsub...   89    
ffa_ch1_genesis.kv     90 end FZ_Arith;