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Optimize pcg32_random_r utilizing more instruction level parallelism #17

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Optimize pcg32_random_r utilizing more instruction level parallelism #17

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2 changes: 1 addition & 1 deletion pcg_basic.c
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Original file line number Diff line number Diff line change
Expand Up @@ -61,7 +61,7 @@ uint32_t pcg32_random_r(pcg32_random_t* rng)
{
uint64_t oldstate = rng->state;
rng->state = oldstate * 6364136223846793005ULL + rng->inc;
uint32_t xorshifted = ((oldstate >> 18u) ^ oldstate) >> 27u;
uint32_t xorshifted = oldstate >> 27 ^ oldstate >> 45;
uint32_t rot = oldstate >> 59u;
return (xorshifted >> rot) | (xorshifted << ((-rot) & 31));
}
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