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use mrand in baground

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nikola
2024-12-02 01:11:33 +01:00
parent d77cca5527
commit 7d9b16cac8
4 changed files with 26 additions and 20 deletions
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25
src/values/mrand.cpp
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@@ -3,7 +3,6 @@
#include "values/mrand.hpp"
static uint32_t rprand_state[4] = {0};
static uint64_t rprand_seed = 0;
static inline uint32_t my_rotate_left(const uint32_t x, int k)
{
@@ -27,7 +26,7 @@ uint32_t my_rprand_xoshiro(uint32_t state[4])
return result;
}
uint64_t rprand_splitmix64()
uint64_t rprand_splitmix64(uint64_t &rprand_seed)
{
uint64_t z = (rprand_seed += 0x9e3779b97f4a7c15);
z = (z ^ (z >> 30)) * 0xbf58476d1ce4e5b9;
@@ -39,14 +38,14 @@ namespace mrand
{
void setSeed(unsigned long long seed)
{
rprand_seed = (uint64_t)seed; // Set SplitMix64 seed for further use
uint64_t rprand_seed = (uint64_t)seed; // Set SplitMix64 seed for further use
// To generate the Xoshiro128** state, we use SplitMix64 generator first
// We generate 4 pseudo-random 64bit numbers that we combine using their LSB|MSB
rprand_state[0] = (uint32_t)(rprand_splitmix64() & 0xffffffff);
rprand_state[1] = (uint32_t)((rprand_splitmix64() & 0xffffffff00000000) >> 32);
rprand_state[2] = (uint32_t)(rprand_splitmix64() & 0xffffffff);
rprand_state[3] = (uint32_t)((rprand_splitmix64() & 0xffffffff00000000) >> 32);
rprand_state[0] = (uint32_t)(rprand_splitmix64(rprand_seed) & 0xffffffff);
rprand_state[1] = (uint32_t)((rprand_splitmix64(rprand_seed) & 0xffffffff00000000) >> 32);
rprand_state[2] = (uint32_t)(rprand_splitmix64(rprand_seed) & 0xffffffff);
rprand_state[3] = (uint32_t)((rprand_splitmix64(rprand_seed) & 0xffffffff00000000) >> 32);
}
int getValue(int min, int max)
@@ -60,4 +59,16 @@ namespace mrand
{
return my_rprand_xoshiro(rprand_state) / 4294967295.0f;
}
int getValue(int min, int max, uint32_t state[4])
{
int value = my_rprand_xoshiro(state) % (std::abs(max - min) + 1) + min;
return value;
}
float getFloat(uint32_t state[4])
{
return my_rprand_xoshiro(state) / 4294967295.0f;
}
}