BGE_RSS_KEYREG_SIZE
((i) * BGE_RSS_KEYREG_SIZE))
(k[(x) * BGE_RSS_KEYREG_SIZE] << 24 | \
k[(x) * BGE_RSS_KEYREG_SIZE + 1] << 16 | \
k[(x) * BGE_RSS_KEYREG_SIZE + 2] << 8 | \
k[(x) * BGE_RSS_KEYREG_SIZE + 3])
uint8_t key[BGE_RSS_KEYREG_CNT * BGE_RSS_KEYREG_SIZE];