File : fz_shift.ads
1 ------------------------------------------------------------------------------
2 ------------------------------------------------------------------------------
3 -- This file is part of 'Finite Field Arithmetic', aka 'FFA'. --
4 -- --
5 -- (C) 2017 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_Shift is
25
26 pragma Pure;
27
28 --------------------------------------------------------------
29 -- Shift Right
30 --------------------------------------------------------------
31
32 -- ShiftedN := N >> Count (with Overflow Input and Output)
33 procedure FZ_ShiftRight_O_I(N : in FZ;
34 ShiftedN : out FZ;
35 Count : in WBit_Index;
36 Overflow : out Word;
37 OF_in : in Word);
38 pragma Inline_Always(FZ_ShiftRight_O_I);
39
40 -- ShiftedN := N >> Count (with Overflow Output only)
41 procedure FZ_ShiftRight_O(N : in FZ;
42 ShiftedN : out FZ;
43 Count : in WBit_Index;
44 Overflow : out Word);
45 pragma Inline_Always(FZ_ShiftRight_O);
46
47 -- ShiftedN := N >> Count (no Overflow output or input)
48 procedure FZ_ShiftRight(N : in FZ;
49 ShiftedN : out FZ;
50 Count : in WBit_Index);
51 pragma Inline_Always(FZ_ShiftRight);
52
53 --------------------------------------------------------------
54 -- Shift Left
55 --------------------------------------------------------------
56
57 -- ShiftedN := N << Count (with Overflow Input and Output)
58 procedure FZ_ShiftLeft_O_I(N : in FZ;
59 ShiftedN : out FZ;
60 Count : in WBit_Index;
61 Overflow : out Word;
62 OF_in : in Word);
63 pragma Inline_Always(FZ_ShiftLeft_O_I);
64
65 -- ShiftedN := N << Count (with Overflow Output only)
66 procedure FZ_ShiftLeft_O(N : in FZ;
67 ShiftedN : out FZ;
68 Count : in WBit_Index;
69 Overflow : out Word);
70 pragma Inline_Always(FZ_ShiftLeft_O);
71
72 -- ShiftedN := N << Count (no Overflow output or input)
73 procedure FZ_ShiftLeft(N : in FZ;
74 ShiftedN : out FZ;
75 Count : in WBit_Index);
76 pragma Inline_Always(FZ_ShiftLeft);
77
78 end FZ_Shift;