cfinv

Condition Flag Invert

CFINV

Inverts the C (Carry) flag.

Details

Inverts the Carry flag (C) in the condition flags register. This instruction is AArch64-only and requires the FEAT_FlagM extension. All other condition flags (N, Z, V) remain unchanged. The operation is not privileged.

Pseudocode Operation

C ← NOT C

Example

CFINV

Encoding

Binary Layout

1101010100000

000

0100

0000

000

11111

Format System

Opcode 0xD500401F

Extension FEAT_FlagM

Operands

Reference (Arm A64 ISA)

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0xD500401F	CFINV		A64		1101010100000 \| 000 \| 0100 \| 0000 \| 000 \| 11111

Description

Invert Carry Flag. This instruction inverts the value of the PSTATE.C flag.

Operation

PSTATE.C = NOT(PSTATE.C);