1 static uint64_t s[ 16 ] = {
2 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL,
3 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL,
4 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL,
5 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL, 0xAAAAAAAAAAAAAAAAULL
6 };
7
8 static uint64_t __inline xrand(void) {
9 static int p;
10 uint64_t s0 = s[ p ];
11 uint64_t s1 = s[ p = ( p + 1 ) & 15 ];
12 s1 ^= s1 << 31; // a
13 s1 ^= s1 >> 11; // b
14 s0 ^= s0 >> 30; // c
15 return ( s[ p ] = s0 ^ s1 ) * 1181783497276652981LL;
16 }
随机数生成太多了，网上一搜一大片， 慢慢积累把
