WORD_SIZE
int words = bytes / WORD_SIZE;
addr = (reg / WORD_SIZE) % (BANK_SIZE / WORD_SIZE);
reg += WORD_SIZE;
.stride = WORD_SIZE,
.word_size = WORD_SIZE,
#define WORD_BITS (WORD_SIZE * BITS_PER_BYTE)
#define WORDS_PER_CHUNK (RIM_CHUNK_SIZE/WORD_SIZE)
ret = delta_bytes/WORD_SIZE;