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Kokkos_UnorderedMap_impl.cpp
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Kokkos_UnorderedMap_impl.cpp
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/*
//@HEADER
// ************************************************************************
//
// Kokkos v. 2.0
// Copyright (2014) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact H. Carter Edwards (hcedwar@sandia.gov)
//
// ************************************************************************
//@HEADER
*/
#include <Kokkos_UnorderedMap.hpp>
namespace
Kokkos
{
namespace
Impl
{
uint32_t
find_hash_size
(
uint32_t
size
)
{
if
(
size
==
0u
)
return
0u
;
// these primes try to preserve randomness of hash
static
const
uint32_t
primes
[]
=
{
3
,
7
,
13
,
23
,
53
,
97
,
193
,
389
,
769
,
1543
,
2237
,
2423
,
2617
,
2797
,
2999
,
3167
,
3359
,
3539
,
3727
,
3911
,
4441
,
4787
,
5119
,
5471
,
5801
,
6143
,
6521
,
6827
,
7177
,
7517
,
7853
,
8887
,
9587
,
10243
,
10937
,
11617
,
12289
,
12967
,
13649
,
14341
,
15013
,
15727
,
17749
,
19121
,
20479
,
21859
,
23209
,
24593
,
25939
,
27329
,
28669
,
30047
,
31469
,
35507
,
38231
,
40961
,
43711
,
46439
,
49157
,
51893
,
54617
,
57347
,
60077
,
62801
,
70583
,
75619
,
80669
,
85703
,
90749
,
95783
,
100823
,
105871
,
110909
,
115963
,
120997
,
126031
,
141157
,
151237
,
161323
,
171401
,
181499
,
191579
,
201653
,
211741
,
221813
,
231893
,
241979
,
252079
,
282311
,
302483
,
322649
,
342803
,
362969
,
383143
,
403301
,
423457
,
443629
,
463787
,
483953
,
504121
,
564617
,
604949
,
645313
,
685609
,
725939
,
766273
,
806609
,
846931
,
887261
,
927587
,
967919
,
1008239
,
1123477
,
1198397
,
1273289
,
1348177
,
1423067
,
1497983
,
1572869
,
1647761
,
1722667
,
1797581
,
1872461
,
1947359
,
2022253
,
2246953
,
2396759
,
2546543
,
2696363
,
2846161
,
2995973
,
3145739
,
3295541
,
3445357
,
3595117
,
3744941
,
3894707
,
4044503
,
4493921
,
4793501
,
5093089
,
5392679
,
5692279
,
5991883
,
6291469
,
6591059
,
6890641
,
7190243
,
7489829
,
7789447
,
8089033
,
8987807
,
9586981
,
10186177
,
10785371
,
11384539
,
11983729
,
12582917
,
13182109
,
13781291
,
14380469
,
14979667
,
15578861
,
16178053
,
17895707
,
19014187
,
20132683
,
21251141
,
22369661
,
23488103
,
24606583
,
25725083
,
26843549
,
27962027
,
29080529
,
30198989
,
31317469
,
32435981
,
35791397
,
38028379
,
40265327
,
42502283
,
44739259
,
46976221
,
49213237
,
51450131
,
53687099
,
55924061
,
58161041
,
60397993
,
62634959
,
64871921
,
71582857
,
76056727
,
80530643
,
85004567
,
89478503
,
93952427
,
98426347
,
102900263
,
107374217
,
111848111
,
116322053
,
120795971
,
125269877
,
129743807
,
143165587
,
152113427
,
161061283
,
170009141
,
178956983
,
187904819
,
196852693
,
205800547
,
214748383
,
223696237
,
232644089
,
241591943
,
250539763
,
259487603
,
268435399
};
const
uint32_t
num_primes
=
sizeof
(
primes
)
/
sizeof
(
uint32_t
);
uint32_t
hsize
=
primes
[
num_primes
-
1
]
;
for
(
uint32_t
i
=
0
;
i
<
num_primes
;
++
i
)
{
if
(
size
<=
primes
[
i
])
{
hsize
=
primes
[
i
];
break
;
}
}
return
hsize
;
}
}}
// namespace Kokkos::Impl
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