swift ring partitioning

gistfile1.txt

power  shift       count
---------------------------------------
32      0     4294967296
31      1     2147483648
30      2     1073741824
29      3      536870912
28      4      268435456
27      5      134217728
26      6       67108864
25      7       33554432
===========================================================
24      8       16777216 (clayg: would freak out if higher)
23      9        8388608
-----------------------------------------------------------
22     10        4194304 (clayg: more likely upper bound)
21     11        2097152
20     12        1048576 (rax uses this?)
19     13         524288
18     14         262144
17     15         131072
16     16          65536
15     17          32768
14     18          16384
13     19           8192
12     20           4096
11     21           2048
10     22           1024
-----------------------------------------------------------
9      23            512
8      24            256
7      25            128
6      26             64
5      27             32
4      28             16
3      29              8
2      30              4
1      31              2