---

---

 1 ------------------------------------------------------------------------------
 2 ------------------------------------------------------------------------------
 3 -- This file is part of 'Finite Field Arithmetic', aka 'FFA'. --
 4 -- --
 5 -- (C) 2019 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 with Words; use Words;
 21 with FZ_Type; use FZ_Type;
 22 
 23 
 24 package FZ_QShft is
 25  
 26  pragma Pure;
 27  
 28  -- Constant-time subword shift, for where there is no barrel shifter
 29  procedure FZ_Quiet_ShiftRight_SubW_Soft(N : in FZ;
 30  ShiftedN : in out FZ;
 31  Count : in WBit_Index);
 32  pragma Inline_Always(FZ_Quiet_ShiftRight_SubW_Soft);
 33  
 34  -- Constant-time subword shift, for where there is no barrel shifter
 35  procedure FZ_Quiet_ShiftLeft_SubW_Soft(N : in FZ;
 36  ShiftedN : in out FZ;
 37  Count : in WBit_Index);
 38  pragma Inline_Always(FZ_Quiet_ShiftLeft_SubW_Soft);
 39  
 40  -- Constant-time arbitrary right-shift.
 41  procedure FZ_Quiet_ShiftRight(N : in FZ;
 42  ShiftedN : in out FZ;
 43  Count : in FZBit_Index);
 44  pragma Inline_Always(FZ_Quiet_ShiftRight);
 45  
 46  -- Constant-time arbitrary left-shift.
 47  procedure FZ_Quiet_ShiftLeft(N : in FZ;
 48  ShiftedN : in out FZ;
 49  Count : in FZBit_Index);
 50  pragma Inline_Always(FZ_Quiet_ShiftLeft);
 51  
 52 end FZ_QShft;