blob: 673cbaf78ea57804eb5e89e04397e10d97837dea (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
-- PSL - Small QM reduction
-- Copyright (C) 2002-2016 Tristan Gingold
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 2 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program. If not, see <gnu.org/licenses>.
with PSL.Nodes; use PSL.Nodes;
with Interfaces; use Interfaces;
package PSL.QM is
type Primes_Set (<>) is private;
function Build_Primes (N : Node) return Primes_Set;
function Build_Node (Ps : Primes_Set) return Node;
function Reduce (N : Node) return Node;
-- The maximum number of terms that this package can handle.
-- The algorithm is in O(2**n)
Max_Terms : constant Natural := 12;
type Term_Assoc_Type is array (1 .. Max_Terms) of Node;
Term_Assoc : Term_Assoc_Type := (others => Null_Node);
Nbr_Terms : Natural := 0;
procedure Reset;
procedure Disp_Primes_Set (Ps : Primes_Set);
private
-- Scalar type used to represent a vector of booleans for terms.
subtype Vector_Type is Unsigned_16;
pragma Assert (Vector_Type'Modulus >= 2 ** Max_Terms);
-- States of a vector of term.
-- If SET is 0, this is a don't care: the term has no influence.
-- If SET is 1, the value of the term is in VAL.
type Prime_Type is record
Val : Unsigned_16;
Set : Unsigned_16;
end record;
subtype Len_Type is Natural range 0 .. 2 ** Max_Terms;
type Set_Type is array (Natural range <>) of Prime_Type;
-- A set of primes is a collection of at most MAX prime.
type Primes_Set (Max : Len_Type) is record
Nbr : Len_Type := 0;
Set : Set_Type (1 .. Max);
end record;
end PSL.QM;
|
