1 | /* |
2 | * Copyright (c) 2015-2016, Intel Corporation |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without |
5 | * modification, are permitted provided that the following conditions are met: |
6 | * |
7 | * * Redistributions of source code must retain the above copyright notice, |
8 | * this list of conditions and the following disclaimer. |
9 | * * Redistributions in binary form must reproduce the above copyright |
10 | * notice, this list of conditions and the following disclaimer in the |
11 | * documentation and/or other materials provided with the distribution. |
12 | * * Neither the name of Intel Corporation nor the names of its contributors |
13 | * may be used to endorse or promote products derived from this software |
14 | * without specific prior written permission. |
15 | * |
16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
26 | * POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
28 | |
29 | /** \file |
30 | * \brief Multibit: lookup tables and support code. |
31 | * |
32 | * This C file contains the constant tables used by multibit, so we don't end |
33 | * up creating copies of them for every unit that uses it. |
34 | */ |
35 | |
36 | #include "multibit.h" |
37 | #include "ue2common.h" |
38 | |
39 | const u8 mmbit_keyshift_lut[32] = { |
40 | 30, 30, 24, 24, 24, 24, 24, 24, 18, 18, 18, |
41 | 18, 18, 18, 12, 12, 12, 12, 12, 12, 6, 6, |
42 | 6, 6, 6, 6, 0, 0, 0, 0, 0, 0 |
43 | }; |
44 | |
45 | // The only actually valid values of ks are as shown in the LUT above, but a |
46 | // division is just too expensive. |
47 | const u8 mmbit_maxlevel_from_keyshift_lut[32] = { |
48 | 0, 0, 0, 0, 0, 0, |
49 | 1, 1, 1, 1, 1, 1, |
50 | 2, 2, 2, 2, 2, 2, |
51 | 3, 3, 3, 3, 3, 3, |
52 | 4, 4, 4, 4, 4, 4, |
53 | 5, 5 |
54 | }; |
55 | |
56 | const u8 mmbit_maxlevel_direct_lut[32] = { |
57 | 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, |
58 | 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, |
59 | 1, 1, 1, 1, 0, 0, 0, 0, 0, 0 |
60 | }; |
61 | |
62 | #define ZERO_TO_LUT(x) ((1ULL << x) - 1) |
63 | |
64 | const u64a mmbit_zero_to_lut[65] = { |
65 | ZERO_TO_LUT(0), |
66 | ZERO_TO_LUT(1), |
67 | ZERO_TO_LUT(2), |
68 | ZERO_TO_LUT(3), |
69 | ZERO_TO_LUT(4), |
70 | ZERO_TO_LUT(5), |
71 | ZERO_TO_LUT(6), |
72 | ZERO_TO_LUT(7), |
73 | ZERO_TO_LUT(8), |
74 | ZERO_TO_LUT(9), |
75 | ZERO_TO_LUT(10), |
76 | ZERO_TO_LUT(11), |
77 | ZERO_TO_LUT(12), |
78 | ZERO_TO_LUT(13), |
79 | ZERO_TO_LUT(14), |
80 | ZERO_TO_LUT(15), |
81 | ZERO_TO_LUT(16), |
82 | ZERO_TO_LUT(17), |
83 | ZERO_TO_LUT(18), |
84 | ZERO_TO_LUT(19), |
85 | ZERO_TO_LUT(20), |
86 | ZERO_TO_LUT(21), |
87 | ZERO_TO_LUT(22), |
88 | ZERO_TO_LUT(23), |
89 | ZERO_TO_LUT(24), |
90 | ZERO_TO_LUT(25), |
91 | ZERO_TO_LUT(26), |
92 | ZERO_TO_LUT(27), |
93 | ZERO_TO_LUT(28), |
94 | ZERO_TO_LUT(29), |
95 | ZERO_TO_LUT(30), |
96 | ZERO_TO_LUT(31), |
97 | ZERO_TO_LUT(32), |
98 | ZERO_TO_LUT(33), |
99 | ZERO_TO_LUT(34), |
100 | ZERO_TO_LUT(35), |
101 | ZERO_TO_LUT(36), |
102 | ZERO_TO_LUT(37), |
103 | ZERO_TO_LUT(38), |
104 | ZERO_TO_LUT(39), |
105 | ZERO_TO_LUT(40), |
106 | ZERO_TO_LUT(41), |
107 | ZERO_TO_LUT(42), |
108 | ZERO_TO_LUT(43), |
109 | ZERO_TO_LUT(44), |
110 | ZERO_TO_LUT(45), |
111 | ZERO_TO_LUT(46), |
112 | ZERO_TO_LUT(47), |
113 | ZERO_TO_LUT(48), |
114 | ZERO_TO_LUT(49), |
115 | ZERO_TO_LUT(50), |
116 | ZERO_TO_LUT(51), |
117 | ZERO_TO_LUT(52), |
118 | ZERO_TO_LUT(53), |
119 | ZERO_TO_LUT(54), |
120 | ZERO_TO_LUT(55), |
121 | ZERO_TO_LUT(56), |
122 | ZERO_TO_LUT(57), |
123 | ZERO_TO_LUT(58), |
124 | ZERO_TO_LUT(59), |
125 | ZERO_TO_LUT(60), |
126 | ZERO_TO_LUT(61), |
127 | ZERO_TO_LUT(62), |
128 | ZERO_TO_LUT(63), |
129 | ~0ULL |
130 | }; |
131 | |
132 | const u32 mmbit_root_offset_from_level[7] = { |
133 | 0, |
134 | 1, |
135 | 1 + (1 << MMB_KEY_SHIFT), |
136 | 1 + (1 << MMB_KEY_SHIFT) + (1 << MMB_KEY_SHIFT * 2), |
137 | 1 + (1 << MMB_KEY_SHIFT) + (1 << MMB_KEY_SHIFT * 2) + (1 << MMB_KEY_SHIFT * 3), |
138 | 1 + (1 << MMB_KEY_SHIFT) + (1 << MMB_KEY_SHIFT * 2) + (1 << MMB_KEY_SHIFT * 3) + (1 << MMB_KEY_SHIFT * 4), |
139 | 1 + (1 << MMB_KEY_SHIFT) + (1 << MMB_KEY_SHIFT * 2) + (1 << MMB_KEY_SHIFT * 3) + (1 << MMB_KEY_SHIFT * 4) + (1 << MMB_KEY_SHIFT * 5), |
140 | }; |
141 | |