The one-cycle instruction is 1us, such as NOP, MOV Rn, #data, etc.
The double loop instruction is 2us, such as SJMP.
Four-cycle instruction is 4us, such as DIV, MUL and so on.
If the crystal oscillator is 1 1.0592MHz, then a period is 1.085us, which means that the time is 1.085 times the period of 12M.