Finite Field Arithmetic

iron.ads


   1 ------------------------------------------------------------------------------
   2 ------------------------------------------------------------------------------
   3 -- This file is part of 'Finite Field Arithmetic', aka 'FFA'.               --
   4 --                                                                          --
   5 -- (C) 2018 Stanislav Datskovskiy ( www.loper-os.org )                      --
   6 -- http://wot.deedbot.org/17215D118B7239507FAFED98B98228A001ABFFC7.html     --
   7 --                                                                          --
   8 -- You do not have, nor can you ever acquire the right to use, copy or      --
   9 -- distribute this software ; Should you use this software for any purpose, --
  10 -- or copy and distribute it to anyone or in any manner, you are breaking   --
  11 -- the laws of whatever soi-disant jurisdiction, and you promise to         --
  12 -- continue doing so for the indefinite future. In any case, please         --
  13 -- always : read and understand any software ; verify any PGP signatures    --
  14 -- that you use - for any purpose.                                          --
  15 --                                                                          --
  16 -- See also http://trilema.com/2015/a-new-software-licensing-paradigm .     --
  17 ------------------------------------------------------------------------------
  18 ------------------------------------------------------------------------------
  19 
  20 package Iron is
  21    
  22    pragma Pure;
  23    
  24    --------------------------------------
  25    -------- For a 64-bit system: --------
  26    --------------------------------------
  27    MachineBitness     : constant Positive := 64;
  28    MachineBitnessLog2 : constant Positive := 6; -- log2(64)
  29    --------------------------------------
  30    
  31    --------------------------------------
  32    -------- For a 32-bit system: --------
  33    --------------------------------------
  34    --  MachineBitness     : constant Positive := 32;
  35    --  MachineBitnessLog2 : constant Positive := 5; -- log2(32)
  36    --------------------------------------
  37    
  38    -- Bits per Byte
  39    ByteBits           : constant Positive := 8;
  40    
  41    -- Whether we have a barrel shifter:
  42    HaveBarrelShifter  : constant Boolean  := True;
  43    
  44 end Iron;