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more cleanup

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This commit is contained in:
Adam Ierymenko 2019-08-14 15:12:49 -07:00
parent 4da8036222
commit 6947a6b1d4
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GPG key ID: 1657198823E52A61
2 changed files with 14 additions and 12 deletions
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21
node/Utils.cpp
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@ -400,17 +400,20 @@ uint64_t Utils::random()
{
// https://en.wikipedia.org/wiki/Xorshift#xoshiro256**
static Mutex l;
static uint64_t s[4] = { Utils::getSecureRandom64(),Utils::getSecureRandom64(),Utils::getSecureRandom64(),Utils::getSecureRandom64() };
static uint64_t s0 = Utils::getSecureRandom64();
static uint64_t s1 = Utils::getSecureRandom64();
static uint64_t s2 = Utils::getSecureRandom64();
static uint64_t s3 = Utils::getSecureRandom64();
l.lock();
const uint64_t result = ROL64(s[1] * 5,7) * 9;
const uint64_t t = s[1] << 17;
s[2] ^= s[0];
s[3] ^= s[1];
s[1] ^= s[2];
s[0] ^= s[3];
s[2] ^= t;
s[3] = ROL64(s[3],45);
const uint64_t result = ROL64(s1 * 5,7) * 9;
const uint64_t t = s1 << 17;
s2 ^= s0;
s3 ^= s1;
s1 ^= s2;
s0 ^= s3;
s2 ^= t;
s3 = ROL64(s3,45);
l.unlock();
return result;