cmp

The compare instructions perform works like sub but does not update the accumulator. It only updates all flags accordingly.

Instruction	Encoding	Semantics	Cycles
cmp acc, reg8	01 111 rrr	set flags corresponding to $\mathit{acc} - \mathit{reg8}$	3/41/52
cmp acc, imm8	00 111 011 imm8	set flags corresponding to $\mathit{acc} - \mathit{imm8}$	3

1. 4 cycles for unprefixed cmp acc, [pi]
2. 5 cycles for cmp acc, [pi] with prefix_a16 (the sequence prefix_a16; cmp acc, [pi] takes 6 cycles)