Level (0=nonexist, 1=minimal, 2=reasonable, 3=full)

Memory access
1 fetch
1 store
2 xchg

lop+mov
1 nand
2 cpy1, and, or, xor
3 set0, set1, nand, nor, xnor, cpy2, not1, not2, . . .

arithmic
1 add
2 sub, neg
3 mul, div

bop
1 rl
3 sl, sr, rr, sar

branching
1 b, bz
2 ba, baz