| 129 |
|
* calls to nextSeed(): Each instance carries the state of this |
| 130 |
|
* generator as nextSplit. Gammas are treated as 57bit values, |
| 131 |
|
* advancing by adding GAMMA_GAMMA mod GAMMA_PRIME, and bit-mixed |
| 132 |
< |
* with a 57-bit version of mix, using the "Mix01" multiplicative |
| 132 |
> |
* with a 57-bit version of mix, using the "Mix13" multiplicative |
| 133 |
|
* constants for MurmurHash3 described by David Stafford |
| 134 |
|
* (http://zimbry.blogspot.com/2011/09/better-bit-mixing-improving-on.html). |
| 135 |
|
* The value of GAMMA_GAMMA is arbitrary (except must be at least |
| 262 |
|
* above for explanation. |
| 263 |
|
*/ |
| 264 |
|
private static long mix57(long z) { |
| 265 |
< |
z ^= (z >>> 33); |
| 266 |
< |
z *= 0x7fb5d329728ea185L; |
| 265 |
> |
z = (z ^ (z >>> 30)) * 0xbf58476d1ce4e5b9L; |
| 266 |
|
z &= 0x01FFFFFFFFFFFFFFL; |
| 267 |
< |
z ^= (z >>> 33); |
| 269 |
< |
z *= 0x81dadef4bc2dd44dL; |
| 267 |
> |
z = (z ^ (z >>> 27)) * 0x94d049bb133111ebL; |
| 268 |
|
z &= 0x01FFFFFFFFFFFFFFL; |
| 269 |
< |
z ^= (z >>> 33); |
| 269 |
> |
z ^= (z >>> 31); |
| 270 |
|
return z; |
| 271 |
|
} |
| 272 |
|
|
