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/*
* Copyright © 2016 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef IGT_RAND_H
#define IGT_RAND_H
#include <stdint.h>
uint32_t hars_petruska_f54_1_random(uint32_t *state);
uint32_t hars_petruska_f54_1_random_seed(uint32_t seed);
uint32_t hars_petruska_f54_1_random_unsafe(void);
static inline void hars_petruska_f54_1_random_perturb(uint32_t xor)
{
uint32_t seed = hars_petruska_f54_1_random_seed(0) ^ xor;
hars_petruska_f54_1_random_seed(seed);
hars_petruska_f54_1_random_seed(hars_petruska_f54_1_random_unsafe());
}
/* Returns: pseudo-random number in interval [0, ep_ro) */
static inline uint32_t hars_petruska_f54_1_random_unsafe_max(uint32_t ep_ro)
{
return ((uint64_t)hars_petruska_f54_1_random_unsafe() * ep_ro) >> 32;
}
#endif /* IGT_RAND_H */
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