arch_get_random_longs
longs = arch_get_random_longs(&rng_seed[i], ARRAY_SIZE(rng_seed) - i);
longs = arch_get_random_longs(&block.rdseed[i], ARRAY_SIZE(block.rdseed) - i);
longs = arch_get_random_longs(entropy, ARRAY_SIZE(entropy) - i);