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/*
This file is part of ctak.
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 ctak. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef XORSHIFT_H
#define XORSHIFT_H
#include <stdint.h>
extern uint64_t xors;
#define XORSHIFT64 \
{ \
xors ^= xors >> 12; \
xors ^= xors << 25; \
xors ^= xors >> 27; \
}
#define RANDOM64 (xors * 0x2545F4914F6CDD1D)
#define RANDOM32 ((uint32_t)(RANDOM64>>32))
static inline uint64_t rand64(void) {
XORSHIFT64;
return RANDOM64;
}
static inline uint32_t rand32(void) {
XORSHIFT64;
return RANDOM32;
}
#endif
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