CLC (Clear Carry Flag)

Opcodes

Opcode Instruction Op/En 64-bit Mode Compat/Leg Mode Description
F8 CLC NP Valid Valid Clear CF flag.

Instruction Operand Encoding

Op/En Operand 1 Operand 2 Operand 3 Operand 4
NP NA NA NA NA

Description

Clears the CF flag in the EFLAGS register. Operation is the same in all modes.

Operation

CF ← 0;

Flags Affected

The CF flag is set to 0. The OF, ZF, SF, AF, and PF flags are unaffected.

Exceptions (All Operating Modes)

#UD

If the LOCK prefix is used.