# CLUI — Clear User Interrupt Flag

Opcode/Instruction | Op/En | 64/32 bit Mode Support | CPUID Feature Flag | Description
--- | --- | --- | --- | ---
F3 0F 01 EE CLUI | ZO | V/I | UINTR | Clear user interrupt flag; user interrupts blocked when user interrupt flag cleared.

## Instruction Operand Encoding ¶

Op/En | Tuple | Operand 1 | Operand 2 | Operand 3 | Operand 4
--- | --- | --- | --- | --- | ---
ZO | N/A | N/A | N/A | N/A | N/A

### Description ¶

CLUI clears the user interrupt flag (UIF). Its effect takes place immediately: a user interrupt cannot be delivered on the instruction boundary following CLUI.

An execution of CLUI inside a transactional region causes a transactional abort; the abort loads EAX as it would have had it been caused due to an execution of CLI.

### Operation ¶

    UIF := 0;

### Flags Affected ¶

None.

## Protected Mode Exceptions ¶

#UD | The CLUI instruction is not recognized in protected mode.

## Real-Address Mode Exceptions ¶

#UD | The CLUI instruction is not recognized in real-address mode.

## Virtual-8086 Mode Exceptions ¶

#UD | The CLUI instruction is not recognized in virtual-8086 mode.

## Compatibility Mode Exceptions ¶

#UD | The CLUI instruction is not recognized in compatibility mode.

## 64-Bit Mode Exceptions ¶

#UD | If the LOCK prefix is used.
If executed inside an enclave.
If CR4.UINTR = 0.
If CPUID.07H.0H:EDX.UINTR[bit 5] = 0.