Intel Pentium CPU Instruction Set Reference
CLI instruction - Clear Interrupt Flag
| Code |
Mnemonic |
Description |
| FA |
CLI |
Clear interrupt flag; interrupts disabled when interrupt flag cleared |
Description
Clears the IF flag in the EFLAGS register. No other flags are affected. Clearing the IF flag causes the processor to ignore maskable external interrupts. The IF flag and the CLI and STI instruction have no affect on the generation of exceptions and NMI interrupts.
| Operands |
Bytes |
Clocks |
| |
1 |
7 |
NP |
Flags
| ID |
unaffected |
DF |
unaffected |
| VIP |
unaffected |
IF |
cleared to 0 if the CPL is equal to or less than the IOPL; otherwise, it is not affected |
| VIF |
unaffected |
TF |
unaffected |
| AC |
unaffected |
SF |
unaffected |
| VM |
unaffected |
ZF |
unaffected |
| RF |
unaffected |
AF |
unaffected |
| NT |
unaffected |
PF |
unaffected |
| IOPL |
unaffected |
CF |
unaffected |
| OF |
unaffected |
