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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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15
src/random/xoroshiro/32bitValue/xoroshiro64star.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 "xoroshiro64.h"
/*
This is xoroshiro64* 1.0, our best and fastest 32-bit small-state
@@ -27,13 +27,8 @@ static inline uint32 rotl(const uint32 x, int k) {
return (x << k) | (x >> (32 - k));
}
typedef union {
uint64 merged;
uint32 s[2];
} _state_t;
uint32 xoroshiro64star_next(void* _state) {
_state_t* state=_state;
xoroshiro64_state* state=_state;
const uint32 s0 = state->s[0];
uint32 s1 = state->s[1];
const uint32 result = s0 * 0x9E3779BB;
@@ -45,9 +40,9 @@ uint32 xoroshiro64star_next(void* _state) {
return result;
}
void* xoroshiro64star_init(uint64 seed){
_state_t* state=malloc(sizeof(_state_t));
splitmix64_state splitmix=splitmix64_init(seed);
void* xoroshiro64_init(uint64 seed){
xoroshiro64_state* state=malloc(sizeof(xoroshiro64_state));
splitmix64_state* splitmix=splitmix64_init(seed);
state->merged=splitmix64_next(splitmix);
return state;
}