Intel ITANIUM ARCHITECTURE - SOFTWARE DEVELOPERS MANUAL VOLUME 4 REV 2.3 Manual page 69

CLI—Clear Interrupt Flag (Continued)
FI;
FI;
IF Itanium System Environment AND CFLG.ii AND IF != OLD_IF
THEN IA-32_Intercept(System_Flag,CLI);
Flags Affected
The IF is cleared to 0 if the CPL is equal to or less than the IOPL; otherwise, the it is not
affected. The other flags in the EFLAGS register are unaffected.
Additional Itanium System Environment Exceptions
IA-32_Intercept
Protected Mode Exceptions
#GP(0)
Real Address Mode Exceptions
None.
Virtual 8086 Mode Exceptions
#GP(0)
4:62
FI;
FI;
ELSE (*CR4.PVI==0 *)
IF IOPL < CPL
THEN #GP(0);
ELSE IF <- 0;
FI;
FI;
ELSE (* Executing in Virtual-8086 mode *)
IF IOPL = 3
THEN
IF 
ELSE
IF CR4.VME= 0
THEN #GP(0);
ELSE VIF <- 0;
FI;
FI;
System Flag Intercept Trap if CFLG.ii is 1 and the IF flag changes
state.
If the CPL is greater (has less privilege) than the IOPL of the current
program or procedure.
If the CPL is greater (has less privilege) than the IOPL of the current
program or procedure.
Volume 4: Base IA-32 Instruction Reference