1 /* go-new-map.c -- allocate a new map.
3 Copyright 2009 The Go Authors. All rights reserved.
4 Use of this source code is governed by a BSD-style
5 license that can be found in the LICENSE file. */
11 /* List of prime numbers, copied from libstdc++/src/hashtable.c. */
13 static const unsigned long prime_list
[] = /* 256 + 1 or 256 + 48 + 1 */
15 2ul, 3ul, 5ul, 7ul, 11ul, 13ul, 17ul, 19ul, 23ul, 29ul, 31ul,
16 37ul, 41ul, 43ul, 47ul, 53ul, 59ul, 61ul, 67ul, 71ul, 73ul, 79ul,
17 83ul, 89ul, 97ul, 103ul, 109ul, 113ul, 127ul, 137ul, 139ul, 149ul,
18 157ul, 167ul, 179ul, 193ul, 199ul, 211ul, 227ul, 241ul, 257ul,
19 277ul, 293ul, 313ul, 337ul, 359ul, 383ul, 409ul, 439ul, 467ul,
20 503ul, 541ul, 577ul, 619ul, 661ul, 709ul, 761ul, 823ul, 887ul,
21 953ul, 1031ul, 1109ul, 1193ul, 1289ul, 1381ul, 1493ul, 1613ul,
22 1741ul, 1879ul, 2029ul, 2179ul, 2357ul, 2549ul, 2753ul, 2971ul,
23 3209ul, 3469ul, 3739ul, 4027ul, 4349ul, 4703ul, 5087ul, 5503ul,
24 5953ul, 6427ul, 6949ul, 7517ul, 8123ul, 8783ul, 9497ul, 10273ul,
25 11113ul, 12011ul, 12983ul, 14033ul, 15173ul, 16411ul, 17749ul,
26 19183ul, 20753ul, 22447ul, 24281ul, 26267ul, 28411ul, 30727ul,
27 33223ul, 35933ul, 38873ul, 42043ul, 45481ul, 49201ul, 53201ul,
28 57557ul, 62233ul, 67307ul, 72817ul, 78779ul, 85229ul, 92203ul,
29 99733ul, 107897ul, 116731ul, 126271ul, 136607ul, 147793ul,
30 159871ul, 172933ul, 187091ul, 202409ul, 218971ul, 236897ul,
31 256279ul, 277261ul, 299951ul, 324503ul, 351061ul, 379787ul,
32 410857ul, 444487ul, 480881ul, 520241ul, 562841ul, 608903ul,
33 658753ul, 712697ul, 771049ul, 834181ul, 902483ul, 976369ul,
34 1056323ul, 1142821ul, 1236397ul, 1337629ul, 1447153ul, 1565659ul,
35 1693859ul, 1832561ul, 1982627ul, 2144977ul, 2320627ul, 2510653ul,
36 2716249ul, 2938679ul, 3179303ul, 3439651ul, 3721303ul, 4026031ul,
37 4355707ul, 4712381ul, 5098259ul, 5515729ul, 5967347ul, 6456007ul,
38 6984629ul, 7556579ul, 8175383ul, 8844859ul, 9569143ul, 10352717ul,
39 11200489ul, 12117689ul, 13109983ul, 14183539ul, 15345007ul,
40 16601593ul, 17961079ul, 19431899ul, 21023161ul, 22744717ul,
41 24607243ul, 26622317ul, 28802401ul, 31160981ul, 33712729ul,
42 36473443ul, 39460231ul, 42691603ul, 46187573ul, 49969847ul,
43 54061849ul, 58488943ul, 63278561ul, 68460391ul, 74066549ul,
44 80131819ul, 86693767ul, 93793069ul, 101473717ul, 109783337ul,
45 118773397ul, 128499677ul, 139022417ul, 150406843ul, 162723577ul,
46 176048909ul, 190465427ul, 206062531ul, 222936881ul, 241193053ul,
47 260944219ul, 282312799ul, 305431229ul, 330442829ul, 357502601ul,
48 386778277ul, 418451333ul, 452718089ul, 489790921ul, 529899637ul,
49 573292817ul, 620239453ul, 671030513ul, 725980837ul, 785430967ul,
50 849749479ul, 919334987ul, 994618837ul, 1076067617ul, 1164186217ul,
51 1259520799ul, 1362662261ul, 1474249943ul, 1594975441ul, 1725587117ul,
52 1866894511ul, 2019773507ul, 2185171673ul, 2364114217ul, 2557710269ul,
53 2767159799ul, 2993761039ul, 3238918481ul, 3504151727ul, 3791104843ul,
54 4101556399ul, 4294967291ul,
55 #if __SIZEOF_LONG__ >= 8
56 6442450933ul, 8589934583ul, 12884901857ul, 17179869143ul,
57 25769803693ul, 34359738337ul, 51539607367ul, 68719476731ul,
58 103079215087ul, 137438953447ul, 206158430123ul, 274877906899ul,
59 412316860387ul, 549755813881ul, 824633720731ul, 1099511627689ul,
60 1649267441579ul, 2199023255531ul, 3298534883309ul, 4398046511093ul,
61 6597069766607ul, 8796093022151ul, 13194139533241ul, 17592186044399ul,
62 26388279066581ul, 35184372088777ul, 52776558133177ul, 70368744177643ul,
63 105553116266399ul, 140737488355213ul, 211106232532861ul, 281474976710597ul,
64 562949953421231ul, 1125899906842597ul, 2251799813685119ul,
65 4503599627370449ul, 9007199254740881ul, 18014398509481951ul,
66 36028797018963913ul, 72057594037927931ul, 144115188075855859ul,
67 288230376151711717ul, 576460752303423433ul,
68 1152921504606846883ul, 2305843009213693951ul,
69 4611686018427387847ul, 9223372036854775783ul,
70 18446744073709551557ul
74 /* Return the next number from PRIME_LIST >= N. */
77 __go_map_next_prime (uintptr_t n
)
83 high
= sizeof prime_list
/ sizeof prime_list
[0];
88 mid
= (low
+ high
) / 2;
90 /* Here LOW <= MID < HIGH. */
92 if (prime_list
[mid
] < n
)
94 else if (prime_list
[mid
] > n
)
99 if (low
>= sizeof prime_list
/ sizeof prime_list
[0])
101 return prime_list
[low
];
104 /* Allocate a new map. */
107 __go_new_map (const struct __go_map_descriptor
*descriptor
, uintptr_t entries
)
110 struct __go_map
*ret
;
112 ientries
= (int) entries
;
113 if (ientries
< 0 || (uintptr_t) ientries
!= entries
)
114 runtime_panicstring ("map size out of range");
119 entries
= __go_map_next_prime (entries
);
120 ret
= (struct __go_map
*) __go_alloc (sizeof (struct __go_map
));
121 ret
->__descriptor
= descriptor
;
122 ret
->__element_count
= 0;
123 ret
->__bucket_count
= entries
;
124 ret
->__buckets
= (void **) __go_alloc (entries
* sizeof (void *));
125 __builtin_memset (ret
->__buckets
, 0, entries
* sizeof (void *));