nop
nop · nops
A no-op; a CPU instruction that does nothingA no-op; a CPU instruction that does nothing.
UK/nɒp/US/nɔp/
Meaning
1 sensesA no-op; a CPU instruction that does nothing.
2004, Patterson et al, Computer Organization and Design: The Hardware/Software Interface Notice that in computing CPI or IPC, we do not count any nops executed as useful instructions.