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no more repeating code in xoshiro/xoroshiro

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timerix
2022-10-24 04:32:06 +06:00
parent f33804f5b8
commit 66935ae437
21 changed files with 214 additions and 204 deletions
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18
src/random/xoshiro/64bitValue/xoshiro256plusplus.c
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@@ -6,7 +6,7 @@ worldwide. This software is distributed without any warranty.
See <http://creativecommons.org/publicdomain/zero/1.0/>. */
#include "../../krandom.h"
#include "xoshiro256.h"
/* This is xoshiro256++ 1.0, one of our all-purpose, rock-solid generators.
It has excellent (sub-ns) speed, a state (256 bits) that is large
@@ -23,12 +23,8 @@ static inline uint64 rotl(const uint64 x, int k) {
return (x << k) | (x>>(64 - k));
}
typedef union {
uint64 s[4];
} _state_t;
uint64 xoshiro256plusplus_next(void* _state) {
_state_t* state=_state;
xoshiro256_state* state=_state;
const uint64 result=rotl(state->s[0] + state->s[3], 23) + state->s[0];
const uint64 t=state->s[1] << 17;
state->s[2] ^= state->s[0];
@@ -39,13 +35,3 @@ uint64 xoshiro256plusplus_next(void* _state) {
state->s[3]=rotl(state->s[3], 45);
return result;
}
void* xoshiro256plusplus_init(uint64 seed){
_state_t* state=malloc(sizeof(_state_t));
splitmix64_state splitmix=splitmix64_init(seed);
state->s[0]=splitmix64_next(splitmix);
state->s[1]=splitmix64_next(splitmix);
state->s[2]=splitmix64_next(splitmix);
state->s[3]=splitmix64_next(splitmix);
return state;
}