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
|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
#include "simplerhash.h"
// Table of primes and their magic-number-divide constant.
// For more info see the book "Hacker's Delight" chapter 10.9 "Unsigned Division by Divisors >= 1"
// These were selected by looking for primes, each roughly twice as big as the next, having
// 32-bit magic numbers, (because the algorithm for using 33-bit magic numbers is slightly slower).
//
const PrimeInfo primeInfo[] =
{
PrimeInfo(9, 0x38e38e39, 1),
PrimeInfo(23, 0xb21642c9, 4),
PrimeInfo(59, 0x22b63cbf, 3),
PrimeInfo(131, 0xfa232cf3, 7),
PrimeInfo(239, 0x891ac73b, 7),
PrimeInfo(433, 0x975a751, 4),
PrimeInfo(761, 0x561e46a5, 8),
PrimeInfo(1399, 0xbb612aa3, 10),
PrimeInfo(2473, 0x6a009f01, 10),
PrimeInfo(4327, 0xf2555049, 12),
PrimeInfo(7499, 0x45ea155f, 11),
PrimeInfo(12973, 0x1434f6d3, 10),
PrimeInfo(22433, 0x2ebe18db, 12),
PrimeInfo(46559, 0xb42bebd5, 15),
PrimeInfo(96581, 0xadb61b1b, 16),
PrimeInfo(200341, 0x29df2461, 15),
PrimeInfo(415517, 0xa181c46d, 18),
PrimeInfo(861719, 0x4de0bde5, 18),
PrimeInfo(1787021, 0x9636c46f, 20),
PrimeInfo(3705617, 0x4870adc1, 20),
PrimeInfo(7684087, 0x8bbc5b83, 22),
PrimeInfo(15933877, 0x86c65361, 23),
PrimeInfo(33040633, 0x40fec79b, 23),
PrimeInfo(68513161, 0x7d605cd1, 25),
PrimeInfo(142069021, 0xf1da390b, 27),
PrimeInfo(294594427, 0x74a2507d, 27),
PrimeInfo(733045421, 0x5dbec447, 28),
};
|
