/*
* Copyright (C) 2014-2018 Sebastiano Vigna
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 3 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see .
*
*/
#include
/* The current state of the generator. */
static uint64_t s[2] = { 1, 1 };
static inline uint64_t rotl(const uint64_t x, int k) {
return (x << k) | (x >> (64 - k));
}
static uint64_t inline next(void) {
const uint64_t s0 = s[0];
uint64_t s1 = s[1];
const uint64_t result = rotl(s0 * 5, 7) * 9;
s1 ^= s0;
s[0] = rotl(s0, 24) ^ s1 ^ (s1 << 16); // a, b
s[1] = rotl(s1, 37); // c
return result;
}
#include "harness.c"