It's the offset from a memory location at a multiple of 4/8 bytes. So you only get 3/7 different states of unalignedness. Unaligned memory accesses below the by

It's the offset from a memory location at a multiple of 4/8 bytes. So you only get 3/7 different states of unalignedness. Unaligned memory accesses below the byte granularity are quite rare, I guess.