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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Simple xorshift PRNG
- * see http://www.jstatsoft.org/v08/i14/paper
- *
- * Copyright (c) 2012 Michael Walle
- * Michael Walle <michael@walle.cc>
- */
- #include <common.h>
- #include <rand.h>
- static unsigned int y = 1U;
- unsigned int rand_r(unsigned int *seedp)
- {
- *seedp ^= (*seedp << 13);
- *seedp ^= (*seedp >> 17);
- *seedp ^= (*seedp << 5);
- return *seedp;
- }
- unsigned int rand(void)
- {
- return rand_r(&y);
- }
- void srand(unsigned int seed)
- {
- y = seed;
- }
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